EVAPCO Controller Users Manual...EVAPCO eco-Air fluid coolers are supplied with a thermowell (1/4” G threads) and a NTC temperature sensor. The thermowell and temperature sensor

EVAPCO Controller Users Manual

Bulletin 1130

For EVAPCO Authorized Parts and Service, Contact Your Local EVAPCO Representative or the Local Mr. GoodTower® Service Provider

EVAPCO...SPECIALISTS IN HEAT TRANSFER PRODUCTS AND SERVICES.Visit EVAPCO’s Website at: www.evapco.com

EVAPCO, Inc. — World Headquarters & Research/Development Center

EVAPCO, Inc. • P.O. Box 1300 • Westminster, MD 21158 USAPHONE: 410-756-2600 • FAX: 410-756-6450 • E-MAIL: [email protected]

EVAPCO, Inc.World HeadquartersP.O. Box 1300Westminster, MD 21158 USAPhone: 410-756-2600Fax: 410-756-6450E-mail: [email protected]

EVAPCO Asia/Pacific

EVAPCO Asia/Pacific Headquarters1159 Luoning Rd. Baoshan Industrial ZoneShanghai 200949, P.R. ChinaPhone: (86) 21-6687-7786Fax: (86) 21-6687-7008E-mail: [email protected]

EVAPCO Europe

EVAPCO Europe BVBAEuropean HeadquartersHeersteveldweg 19Industrieterrein Oost3700 Tongeren, BelgiumPhone: (32) 12-395029Fax: (32) 12-238527E-mail: [email protected]

EVAPCO East5151 Allendale LaneTaneytown, MD 21787 USA410-756-2600 p | 410-756-6450 [email protected] EastKey BuildingTaneytown, MD USA 410-756-2600 p [email protected] MidwestGreenup, IL USA 217-923-3431 [email protected] WestMadera, CA USA559-673-2207 p [email protected] IowaLake View, IA USA712-657-3223 p EVAPCO IowaSales & EngineeringMedford, MN USA507-446-8005 p [email protected] NewtonNewton, IL USA618-783-3433 p [email protected], IL USA 217-923-3431 [email protected]

EVAPCO-BLCT Dry Cooling, Inc. 1011 US Highway 22 WestBridgewater, NJ 08807 USA Phone: 1-908-379-2665E-mail: [email protected] Dry Cooling, Inc.7991 Shaffer ParkwayLittleton, CO 80127 USA Phone: 1-908-379-2665E-mail: [email protected] Parts Phone: 908-895-3236Spare Parts e-mail: [email protected] Power México S. de R.L. de C.V.Calle Iglesia No. 2, Torre ETizapan San Ángel, Del. Álvaro ObregónCiudad de México, D.F. México 01090Phone: +52 (55) 8421-9260e-mail: [email protected] Valves & Systems CorporationA wholly owned subsidiary of EVAPCO, Inc.Bryan, TX USA979-778-0095 p [email protected], Inc.A wholly owned subsidiary of EVAPCO, Inc.Lenexa, KS USA913-322-5165 p [email protected] Components, Inc.A wholly owned subsidiary of EVAPCO, Inc.Ramseur, NC USA336-824-2102 p [email protected] Alcoil, Inc.A wholly owned subsidiary of EVAPCO, Inc.York, PA USA717-347-7500 p [email protected]

EVAPCO Europe, S.r.l.Milan, Italy(39) 02-939-9041 [email protected] Europe, S.r.l.Sondrio, ItalyEVAPCO Europe GmbHMeerbusch, Germany(49) 2159 6956 18 p [email protected] Air SolutionsA wholly owned subsidiary of EVAPCO, Inc.Aabybro, Denmark (45) 9824 4999 p [email protected] Air Solutions GmbHGarbsen, Germany(49) 5137 93875-0 p [email protected] Egypt Engineering Industries Co.A licensed manufacturer of EVAPCO, Inc.Nasr City, Cairo, Egypt2 02 24022866/2 02 24044997 [email protected] / [email protected] S.A. (Pty.) Ltd.A licensed manufacturer of EVAPCO, Inc.Isando 1600, Republic of South Africa(27) 11-392-6630 p [email protected]

EVAPCO (Shanghai) Refrigeration Equipment Co., Ltd.Baoshan Industrial Zone Shanghai, P.R. China (86) 21-6687-7786 p [email protected] EVAPCO Refrigeration Equipment Co., Ltd.Huairou District Beijing, P.R. China 010-6166-7238 p [email protected] Australia (Pty.) Ltd.Riverstone NSW 2765, Australia(61) 2 9627-3322 p [email protected] Composites Sdn. BhdRawang, Selangor, Malaysia(60-3) 6092-2209 p EvapTech Asia Pacific Sdn. BhdA wholly owned subsidiary of EvapTech, Inc.Puchong, Selangor, Malaysia(60-3) 8070-7255 p [email protected]

EVAPCO North America

EVAPCO South America

EVAPCO Brasil Equipamentos Industriais Ltda.Al. Vênus, 151 – CEP: 13347-659Indaiatuba –São Paulo – Brasil(55+11) 5681-2000 [email protected] Technology ResourceCruz das Almas – IndaiatubaSão Paulo, Brasil 13308-20055 (11) [email protected]

For eco-Air™ Air Cooled and Adiabatic Fluid Coolers and Condensers

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Controller User Manual

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3EVAPCO Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Installation and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Panel Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Temperature/Pressure Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Wiring Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Operation and Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Screen Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Navigating the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Modifying a Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8Navigating the Scheduler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Operator Interface Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Welcome Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Standby Status Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Alarms Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16Main Menu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17On/Off Unit Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17View Setpoints Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18Clock/Scheduler Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18Input/Output Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20Error Log Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21Board Switch Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21Service Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22Manufacturer Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41Alarm Event Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

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Introduction

EVAPCO Controller

Congratulations on the purchase of your eco-Air unit with the EVAPCO Controller. The EVAPCO Controller will ensure that youreco-Air unit is operating in the most efficient manner possible while using minimal resources. Along with proper eco-Air unitmaintenance, the EVAPCO Controller will ensure that your eco-Air unit provide years of service at peak efficiency.

The EVAPCO Controller serves as a single connection point for the eco-Air unit and contains all of the protection and logic devicesrequired to run the eco-Air unit in the most efficient manner possible.

In order to reduce downtime, Evapco recommends keeping a stock of spare fuses. Consult the wiring diagram for the quantity,type, and fuse size required. Contact your local EVAPCO representative for replacement or spare parts.

This bulletin includes a description of the screens and parameters that are available through the display located on the front of theEVAPCO Controller. Also included in this bulletin are the functions of the EVAPCO Controller. Please note that the screensdisplayed on your EVAPCO Controller display may vary slightly from the images shown in this document.

Become familiar with the EVAPCO Controller by thoroughly reading and understanding the content of this bulletin. A detailed wiringdiagram can be found in the data pocket inside of the EVAPCO Controller.

If you should require any additional information about the operation or maintenance of this equipment, contact your local EVAPCOrepresentative. You may also visit www.evapco.com for more information.

Installation and Wiring

Safety

Qualified personnel should use proper care, procedures, and tools when operating, maintaining, or repairing this equipment or anyother connected equipment in order to prevent personal injury and/or property damage. The warnings listed below are to be usedas guidelines only.

Warning: EVAPCO eco-Air units should never be operated without fan screens and access doors properly secured and in place.

Warning: Avoid working on electrical circuits while they are live. Proper lock-out/tag-out and all applicable safety practices must be followed prior to servicing any equipment.

Warning: Before opening the panel door, allow sufficient time for VFD’s to discharge after removing power. VFD’s contain capacitive circuits which maintain a charge even after power is removed.

Warning: The three position selector switch is not intended to replace or act as a disconnect to disable the EVAPCO eco-Air unit and/or de-energize the EVAPCO Controller. Be sure to follow lock-out/tag-out and all applicable electrical safety practices before servicing any equipment.

Warning: Do not attempt to service or enter the eco-Air unit even if the unit status is indicated as being off. Unless power is completely removed from the eco-Air unit, it may be possible for the eco-Air unit to start at any time without notice.Be sure to follow lock-out/tag-out and all applicable electrical safety practices before servicing any equipment.

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The following safety issues need to be addressed by those responsible for the installation, maintenance, and repair of the EVAPCOController:

• Access to the control panel (including the disconnect switch(es)).• Sizing and protection of electrical circuits feeding the control panel(s) and branch circuits feeding the controlled equipment.• Proper grounding of electrical circuits.• Qualification of persons who will install, maintain, and service the electrical equipment.

Panel Installation Considerations

When the EVAPCO Controller does not ship factory mounted on the eco-Air unit, the EVAPCO Controller should be placed in closeproximity to the eco-Air unit to reduce the wire lengths required. If the EVAPCO Controller is within sight of or mounted on the eco-Air unit, the EVAPCO Controller may be used as the main electrical disconnect for the eco-Air unit. Otherwise, separate electricaldisconnects may be required. Consult applicable electrical codes to make this determination. Avoid mounting the EVAPCOController with a southern exposure. This will minimize the amount of solar heat gain the system will experience and will make iteasier to view the operator interface.

Temperature/Pressure Sensor Installation

EVAPCO eco-Air fluid coolers are supplied with a thermowell (1/4” G threads) and a NTC temperature sensor. The thermowell andtemperature sensor should be installed in the common return pipework of the eco-Air fluid cooler unit. Thermowells must beinstalled in the horizontal sections of the coil piping. A small amount of thermal paste should be added to the thermowell before theNTC sensor is inserted to ensure a more accurate fluid temperature measurement.

Figure 1The suggested temperature sensor location for fluid coolers. Piping shown by dashed lines provided and installed by others.

TEMPERATURE SENSOR TEMPERATURE SENSOR

EVAPCO eco-Air condensers are supplied with a pressure transducer (7/16”-20 UNF threads). The pressure transducer should belocated in the common compressor hot gas discharge pipework. It is recommended that a shut-off valve be located between thepipework and the pressure transducer to allow the transducer to be more easily replaced should it become damaged.

When the EVAPCO Controller ships factory mounted to the eco-Air unit, the supplied temperature or pressure sensor must bewired to the junction box location on the connection end of the eco-Air unit (Figure 3). If the EVAPCO Controller does not shipfactory mounted, the supplied temperature or pressure sensor must be wired to the EVAPCO Controller. Consult the suppliedwiring diagram for a determination if the junction box is supplied.

Each EVAPCO Controller is supplied with one ambient air sensor that is located on the bottom of the Controller enclosure. Shouldthe EVAPCO Controller be placed in a location where the ambient temperature (i.e. indoors) is not indicative of the ambienttemperature of the eco-Air unit, the ambient temperature sensor must be relocated to a more suitable location and the resultingopening in the enclosure must be sealed with a Type 4 plug.

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Figure 2The suggested pressure sensor location for condensers. Piping shown by dashed lines provided and installed by others.

Figure 3The junction box is highlighted and circled.

PRESSURE SENSOR PRESSURE SENSOR

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Wiring Considerations

Consult the supplied wiring diagram for detailed wiring information. All field wiring is indicated by dashed lines on the wiringdiagram.

All wiring in and out of the EVAPCO Controller should be with copper conductors and wire lengths must be kept as short aspossible. Consult the detailed wiring diagram for field wiring connections of each device. Applicable electrical codes for thelocation should be followed during the sizing and installation of the field wiring. All fittings attached to the EVAPCO Controllermust be Type 4. All wiring must be through the bottom of the EVAPCO Controller. Top entry into the EVAPCO Controller isnot permitted. Any damage caused to any component within or connected to the EVAPCO Controller due to a top entryconnection is not warrantable!

For wiring the EVAPCO Controller to each NEMA fan motor, Belden® VFD cable 295XX (XX denotes gauge) or equivalent shouldbe used. The shield of the VFD cable needs to be bonded to ground at both ends of the cable.

While the EVAPCO Controller does provide provisions for connection to a BAS, this connection is not required for the EVAPCOController to operate.

Operation and Servicing

On eco-Air units equipped with NEMA fan motor(s), the EVAPCO Controller contains a three position selector switch (Bypass-Off-Auto) located behind the HMI door. The operation of each position is as follows:

Auto: The Auto position allows the EVAPCO Controller to operate the eco-Air unit based on the logic programmed into theController. Note that the unit must be switched on before the eco-Air unit will begin to operate. Please see the On/Off UnitScreen section of this document for more information.

Off: In the Off position, the EVAPCO Controller will be powered; however, output commands will not be sent to any of theattached equipment. This position is used for programming the VFD.

Bypass: In the Bypass position, the logic program is bypassed which allows the fan motor(s) to energize independent ofsensor temperature or setpoints. Power is routed around the VFD and thus the fan motor(s) will operate at full power, across-the-line. The VFD will still be energized when the selector switch is in the Bypass position.

The door protecting the HMI must be shut unless an operator is using the HMI interface. This will protect the HMI interface fromcontamination and increase the life of the HMI.

The EVAPCO Controller is supplied with air filters that must be inspected every 90 days. Depending on the installationenvironment, more frequent inspection and/or replacement may be required. A dirty filter can cause the internal panel temperatureto increase and may cause component failure. Permanently removing the filter will allow dirt and particulates to enter the enclosureand may cause premature failure.

Please consult the proper Operation and Maintenance Instructions for start-up and maintenance guides for the eco-Air unitattached to the EVAPCO Controller.

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ALARM button. Direct shortcut to the Alarms Screen. This button will flash red if there is an active alarm.

PRG button (Program). Direct shortcut to the Main Menu Screen.

ESC button. Leaves a menu or an entry field without changing the value.

UP button. Scrolls up in the menu or changes a value.

ENT button. Goes to the selected submenu or accepts a modified value.

DOWN button. Scrolls down in the menu or changes a value.

Screen Navigation

Navigating the Display

The operator interface contains a LED display and six buttons that allow the user to navigate the various screens as well as viewand modify several setpoints that affect the operation of the eco-Air unit.

Table 1A description of the buttons located on the operator interface.

Button Function

Figure 4The operator interface of the EVAPCO Controller.

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Figure 5 provides an overview of the various screens and menus of the EVAPCO Controller.

Active Alarms

Pre-Cooling Stage Rotation Screen

Flush Timer Screen

Pre-Cooling Minimum On Time Screen

Pre-Cooling Increment/Decrement Screen

Fan Motor Status Screen

Alarms Screen

Standby Screen

Standby Status Screens Main Menu Screens

A. On/Off Unit

B. View Setpoints

C. Clock/Scheduler

D. Input/Output

E. Error Log

F. Board Switch

G. Service

H. Manufacturer

Figure 5Controller screen flowchart.

Modifying a Value

To change a parameter on a given screen, first navigate to the desired screen. In this example, the setpoint temperature will bemodified. Once at the desired screen, press the ENT button.

Figure 6The cursor next to the setpoint temperature.

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As seen in Figure 6, the cursor (the shaded block) is next to the setpoint value. To change the value, press the UP or DOWNbutton. To accept the value, press the ENT button.

Figure 7The cursor moved to the next setpoint. Note that the first setpoint value has changed.

Next, press the ESC button to return to the previous menu or repeatedly press the ENT button until the cursor moves to the top ofthe screen.

Figure 8The cursor is located in the top left of the screen.

Navigating the Scheduler

Several functions of the EVAPCO Controller are able to be scheduled to operate during certain periods of the year or at certaintimes of the day. In this example, consider a noise restriction from 8:00pm to 5:30am starting Sunday night and ending Fridaymorning. During the noise restriction hours, the fan speed will be limited to 85% via the Quiet Mode. After navigating to the properscheduler, the screen shown in Figure 9 will be displayed. The day of the week is indicated in the upper left corner.

Figure 9The Scheduler Screen.

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Each block represents a half hour period of time. First, press the ENT button four times until the first block is highlighted by thecursor. Note that this first block represents 12:00am to 12:30am.

Figure 10The 12:00am to 12:30am block is selected.

Press the UP or DOWN button to enable the Quiet Mode during the selected period of time. The selected block will become raisedindicating that the Quiet Mode will be active. Press the ENT button to move to the next half hour period (12:30am to 1:00am).

Figure 11Quiet Mode will be active from 12:00am to 12:30am.

Continue the steps above until the desired blocks are raised. As shown in Figure 12, the Quiet Mode will be active from 12:00am to5:30 am and 8:00pm to 12:00am on Monday.

Figure 12Quiet Mode is active from 12:00am to 5:30am and 8:00pm to 12:00am on Monday.

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Figure 15Tuesday’s schedule is now the same as Monday after the copy.

This schedule for Monday now may be copied to the other days of the week. Press the ENT button to place the cursor after thecopy to text shown on the display.

Next, use the UP or DOWN button to change the NO to YES and press the ENT button. After a few seconds, the YES will changeback to a NO, indicating that the copy was successful. Place the cursor next to the text that says MON. Press the UP or DOWNbutton to change the day to TUE, and press the ENT button. The scheduler for Tuesday should be identical to Monday.

Figure 13The day to copy to the current schedule to is highlighted by the cursor.

Use the UP button to change the copy to date to Tuesday and press the ENT button.

Figure 14After Selecting YES, Monday’s schedule will be copied to Tuesday.

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Repeat the steps above until the desired scheduled is set. Below is what the schedule of each day of the week should be for thisexample.

Figure 16The Quiet Mode weekly schedule for the presented example.

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Operator Interface Screens

Welcome Screen

When the EVAPCO Controller is first energized, the system will do a self-diagnostic test and load all of the interface screens. Whenthe EVAPCO logo (Figure 17) appears, loading is complete. Press the ESC button to proceed to the Standby Status Screens.

Standby Status Screens

The Standby Status Screens provide real time status of the various components of the eco-Air unit such as solenoid valves andfans as well as live data of parameters such as sensor probe values, setpoints, and timer values. Note that all values shown on theStandby Status Screens are read only. To view additional status screens, use the UP or DOWN buttons located on the operatorinterface.

The Standby Screen shown in Figure 18 displays the process temperature, ambient temperature, command fan speed, activesetpoint, and the process pressure. Note that the process pressure is only shown if the eco-Air unit is a condenser. Also, if the eco-Air unit is a condenser, the process or Outlet Temperature will be a temperature derived from the temperature versus pressurerelationship of the refrigerant (see the Service Screens section for more information).

If the eco-Air unit is equipped with a pre-cooling system, the status of the solenoid valve is shown at the bottom of the screen asshown in Figure 18.

Figure 17The EVAPCO Controller Welcome Screen.

Figure 18The Standby Screen.


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Pre-cooling system is inactive (solenoid valve is closed).

Pre-cooling system is active (solenoid valve is open).

Image Description

Table 2The states of the pre-cooling system status indicator.

A bell icon in the lower right corner of the standby screen (see Figure 19) indicates that there is an active alarm. Press the ALARMbutton to go directly to the Alarms Screen.

When the eco-Air unit is equipped with EC fan motors, the status and current speed of the fan motors may be viewed by pressingthe DOWN button.

Figure 19Standby Screen with an active alarm.

Figure 20The left screen displays the status of the fan motors. The right screen displays the live fan motor speeds in rpm.

EC fan motor is off or is not communicating with the controller.

EC fan motor is online and communicating with the controller.

Image Description

Table 3The states of the EC fan motor status indicator.

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Figure 21The increment and decrement timers of the pre-cooling system.

When the eco-Air unit is equipped with a pre-cooling system, several additional status screens indicate the various timersassociated with the control of the pre-cooling system. Figure 21 though Figure 24 will not be displayed unless the eco-Air unit isequipped with a pre-cooling system. Figure 21 displays incremental timers which indicate if the pre-cooling system is getting readyto activate (increase) or deactivate (decrease) based on the process temperature. For example, if the process setpoint is 95°F andthe process temperature rises past the setpoint, the increase timer will begin to count up. Once the timer reaches a predeterminedvalue, the pre-cooling system will activate. Conversely, if the process temperature falls below the process setpoint while the pre-cooling system is active, the decrease timer will begin to count up until a predetermined value is reached. Once the value isreached, the pre-cooling system will stop.

Figure 22The Stage Minimum On Time Status Screen.

Also, once activated, the pre-cooling system remains active for a predetermined amount of time. The times shown on the StageMinimum On Time Status Screen begin to count up until it reaches a predetermined value. The pre-cooling system will remainactive until the minimum on time is satisfied.

Figure 23The Flush Timers Status Screen.

When scheduled or manually enabled, the pre-cooling system will undergo a flushing and drying sequence for a predeterminedabout of time. Each cycle remains active until the timers shown on the flush timers status screen reach the appropriate duration.

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Figure 24The Stage Rotation Status Screen. In this case, stage four will activate first as indicated by the number one.

When the pre-cooling system contains multiple stages or solenoid valves, the solenoid or pre-cooling section that enables first willchange after all stages are switched off. For example, if the eco-Air unit contains two stages, the first time the pre-cooling systemactivates, stage one will be activated first followed by stage two. After both stages are switched off, the next time the pre-coolingsystem is activated, stage two will be activated first followed by stage one.

Figure 26Press the ENT button at this screen to view the alarm log.

All alarms are logged and are viewable by pressing the ENT button while at the screen shown in Figure 26. For more informationabout this screen, please see the Error Log Screen section of this document.

Alarms Screen

The Alarms Screen displays all active alarms. Navigate the alarms by pressing the UP and DOWN buttons on the operatorinterface. Refer to the Alarm Event Description for a description of the possible alarms. To dismiss alarms, press and hold theALARM button for several seconds.

Figure 25The Alarms Screen. In this example, there is an electrical valve fault.

Figure 28The On/Off Unit Screen.

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Main Menu Screen

The Main Menu Screen is available by touching the PRG button on the operator interface. The Main Menu Screen is used tonavigate to additional screens that allow users to modify the current operation of the system or to view additional monitoringinformation. To navigate between the different menu items, use the UP or DOWN arrow buttons on the operator interface. To selecta menu, place the black bar on the desired menu and press the ENT button.

Figure 27The Main Menu Screen.

On/Off Unit Screen

The On/Off Unit Screen shows and allows the operator to set the current operational status of the eco-Air unit. When the eco-Airunit is not controlled via an external source (i.e. BAS), the On/Off Unit Screen is the only way to disable the eco-Air unit withoutremoving power. Note that the EVAPCO Controller must be switched on locally before the unit will operate even if the EVAPCOController is being controlled via a BAS or digital input.

Unit is operational.Unit is being controlled via a BAS and may be enabled by sending an enable signalto the EVAPCO Controller.Unit is being controlled via a digital input and may be enabled by sending anenable signal to the EVAPCO Controller.Unit is turned off manually and may only be enabled via the On/Off Unit Screen.

Status Description

Table 4The operational states of the unit and their descriptions.

The various operational states of the eco-Air unit are explained in the following table:

UnitOn

OFFbyBMS

OFFbyDIN

OFFbyKEY

18


View Setpoints Screen

The View Setpoints Screen allows viewing of all setpoint parameters. For a detailed description of the setpoints and instructionson how to change the various setpoints and options, please see the Service Screens section of this document.

Clock/Scheduler Screens

The Clock/Scheduler Screens allows the internal clock of the EVAPCO Controller to be set as well as the scheduling of severalroutines. If enabled, the following routines may be programmed during certain periods of certain days:

Figure 29One of the screens that allows viewing, but not editing of setpoints and options.

Limits the maximum fan speed tothe value set for quiet operation.Switches the active setpoint to analternate value.The pre-cooling system is activatedto run water over the adiabatic pads.

There is noise restriction during night time periodsdue to close proximity of residences.The cooling load is for an office building whichdoes not require as much cooling during off hours.The unit installation site is located next to a field.The flush routine runs at night to rinse any debristhat may have been sucked onto the adiabaticpads during unit operation.

Routine Function Example Use

Table 5The various functions that may be scheduled hourly.

Quiet Mode

Setpoint 2

Flush

For instructions on setting the scheduler, please see the Navigating the Scheduler section of this document. Note that unlessthe desired routine is set to run via the scheduler (except the flush routine), the scheduler screen for that particular routine willnot be shown.

If equipped with a pre-cooling system, the pre-cooling system may be set to run only during certain dates. In climates that aresubject to freezing temperatures or if there is a reduced cooling load during certain periods of the year, the scheduler may be usedto disable the pre-cooling system. Note that all pipework that is susceptible to freezing must be heat traced in order to avoiddamage. When the scheduler is enabled, the pre-cooling system will only operate during the dates shown in the screen. Note thatthe date format for the period start and stop is day/month. When in the Released state, the pre-cooling system will activate whenrequired as long as all conditions (e.g. enabled for scheduler, ambient is above lower limit, etc.) are satisfied. When changed toLocked, the pre-cooling system will not activate even if additional cooling is required.

19


Figure 30The pre-cooling system scheduler. In this example, the pre-cooling system will only run from April 1st though October 31st.

Figure 31The pre-cooling system flushing parameters.

The amount of time that water flowsover the adiabatic pads.The amount of time that the fans run inreverse during the flushing routine.The fan speed (reverse) during the drycycle of the flushing routine.

0 minutes

0 minutes

0%

Parameter Description Default

Table 6The flushing routine parameters.

Flushing Time

Drying Time

Fan Speed

The pre-cooling system flush routine parameters may be adjusted via the screen shown in Figure 31. All parameters may beadjusted from the factory defaults. Note that only EC fan motors have the capability of spinning in reverse.

20


Figure 32The Clock Adjustment Screen.

The internal clock of the EVAPCO Controller may be set in the screen shown in Figure 32. If any of the scheduler functionality ofthe EVAPCO Controller is used, it is vital that the clock be set to the proper time. Also, the clock is used to add timestamps toalarms. Note that the date is in a dd/mm/yy format.

Figure 33The daylight savings clock adjustment parameters.

In order to ensure proper time keeping, the daylight savings adjustment must be accurate. Any adjustments to the daylightsavings transition parameters may be done on the screen shown in Figure 33.

Input/Output Screens

Figure 34 displays the current status of all digital inputs, digital outputs, analog inputs, and analog outputs of the EVAPCOController. This screen is primarily used for troubleshooting and start-up purposes to determine if the correct signals are being sentto and from the EVAPCO Controller.

Figure 34The Digital Input Status Screen. In this example, the controller is receiving a signal to instruct the unit to operate in quiet mode.

21


Error Log Screen

The Error Log Screen displays all logged alarms. To scroll through the log, press the UP or DOWN button on the operatorinterface. Each logged alarm will display the alarm, the alarm identifier number, the alarm number in the log, the date of the alarm,and the time of the alarm. For instructions on how to clear the alarm log, please see the Alarms Screen section of this document.

Figure 35An example of a logged alarm.

Board Switch Screen

The Board Switch Screen is not currently utilized in the EVAPCO Controller and it is in place for future developments.

Figure 36The Board Switch Screen.

22


Service Screens

The Service Screens allow the user to change setpoints, timers, and other parameters that affect the operation of the eco-Air unit.Before any settings or parameters may be modified, a password must first be entered. The default password is 1234. To enter thepassword, first use the UP button to select a 1 in the first position. Next, press the ENT button to move to the second position. Ifincorrect password is entered, the screen shown in Figure 37 is displayed.

Figure 37The message displayed when an incorrect password is entered.

Figure 38The service menu.

After entering the correct password, the service menu is displayed as shown in Figure 38.

Figure 39This screen allows the language to be changed.

After selecting Change Language, the screen shown in Figure 39 is shown. To change the language, press the ENT button onthe operator interface.

23


Figure 40The language start-up screen settings.

Pressing the UP or DOWN buttons will display the screen shown in Figure 40. If enabled, the EVAPCO Controller will prompt theuser to select a language each time the controller is powered on. After the show mask time has expired or the ESC button ispressed, the Standby Status Screens will be shown.

Selecting Setpoints displays a series of screens that allow various setpoints and options that directly affect the operation of theeco-Air unit to be adjusted. The screen shown in Figure 41 allows the process sensor to be changed. Note that the propersensor type and associated settings will be set at the factory and should not require modification. Also, some sensor typesrequire additional parameters to be set to ensure that the proper scale is being read by the EVAPCO Controller.

When set to No, the user will bepromoted to select a language eachtime the controller is powered on.The amount of time that the user has tochange the language when thecontroller is powered on.

Yes

60 seconds


Table 7The language screen parameters.

Figure 41The language screen parameters.

Disable LanguageMask at Start-up

Show Mask Time

24


The probe type connected to universal input U1.

The process value of the lower reading used to establish ascale. This is not required for all sensor types.The process value of the upper reading used to establish ascale. This is not required for all sensor types.The amount of time that is allowed to elapse after theconnection to the sensor is lost before an alarm is generated.

NTC if Dry Cooler 4-20 mA if CondenserVarious

Various

60 seconds


Table 8The parameters associated with the process sensor.

Probe Type

Minimum Value

Maximum Value

Alarm Delay

Figure 42The process measuring is set as temperature in this example.

The screen shown in Figure 42 allows the user to determine if the process sensor is measuring a temperature value or apressure value. Note that this setting will be set at the factory and should not require modification. For fluid coolers, the defaultsetting will be Temperature and for condensers the default setting will be Pressure.

Figure 43The refrigerant is chosen as R22 in this example.

If the eco-Air unit is a condenser, and the process measuring is set as Pressure in Figure 42, the screen shown in Figure 43 willbe shown. When the EVAPCO Controller ships from the factory, the proper refrigerant for the application is alreadyprogrammed. Refer to Table 9 for a list of the available refrigerants. If the desired refrigerant is not listed in Table 9, a customrefrigerant may be selected by selecting Enable.

25


Table 9The preprogramed refrigerants.

Preprogramed Refrigerants

R22R410AR600aR1270R422AR245Fa

R134aR507R717

R417AR423AR407F

R404AR290R744

R422dR407A

-

R407CR600R728

R413AR427A

-

Figure 44An example of the properties of a custom refrigerant.

Figure 45The plot created of the example custom refrigerant.

If a custom refrigerant is required, the temperature and pressure parameters may be entered on the screen shown in Figure 44.The seven data points describe the characteristics of the desired refrigerant and allow the EVAPCO Controller to perform alinear interpolation between the points to convert the measured pressure to a temperature. The resulting characteristic curve willbe similar to the one shown in Figure 45.

Tem

pera

ture

(°F)

Pressure (PSIG)

00 50

Point 1

Point 2

Point 3

Point 4

Point 5

Point 6

Point 7

100 150 200 250 300

20

40

60

80

100

120

140

26


Figure 46P or PID control may be selected from this screen.

The EVAPCO Controller provides two methods of automatic setpoint control: via P regulation or via PID regulation. Eithermethod of control may be selected from the screen shown in Figure 46.

Figure 47The P Regulator Parameters Screen.

The screen shown in Figure 47 is only visible if the P regulator is chosen.

Controls the fan speed by subtracting the process temperaturefrom the setpoint temperature and linearly ramping up the fanspeed to the current maximum value.Controls the fan speed by utilizing a feedback compensatorconsisting of a proportional, integral, and derivative value.

Parameter Description

Table 10The description of the possible fan speed control options.

P reg.

PID reg. (Default)

27


The value of temperature regulation band will determine how quickly the fan motors will react to changes of the processtemperature. For example, consider the following values:

As shown in Figure 48, if the process temperature would be 97.5°F, the command fan speed would be 50%. However, if theregulation band is set to 10°F and if the process temperature reaches 97.5°F, the command fan speed would be 25%. Thus asmall temperature regulation band will result in rapid changes in fan speed while a large temperature regulation band will resultin more gradual changes in fan speed.

95.0°F5.0°F0%

100%

Parameter Value

Setpoint 1Temperature Regulation Band

Minimum Fan SpeedMaximum Fan Speed

The primary process setpoint.

The secondary process setpoint that may be activated via thescheduler, ambient temperature, or digital input.Determines the temperature band between the minimum andmaximum fan speed.

Set According toSpecification

85°F

10°F


Table 11A description of the P regulator parameters.

Table 12The parameters of the P regulator example.

SP1.m.spd

SP2.m.spd

Temp. reg.band

Figure 48The 5°F and 10°F temperature regulation band samples.

Fan

Spee

d (%

)

Process Temperature (°F)

094 96 98 100 102 104 106

20

40

60

80

100

120

Setpoint

97.5°F

97.5°F

Setpoint+Reg. BandSetpoint+Reg. BandSetpoint+Reg. BandSetpoint+Reg. Band

5F Regulation Band Fan Speed

5F Regulation Band

10F Regulation Band Fan Speed

10F Regulation Band

28


Figure 49The PID Regulator Parameters Screen.

The screen in Figure 49 is only shown if the PID regulator is chosen in Figure 46. The PID regulator uses feedback as well astuning parameters to make the process temperature as close to the setpoint as possible. Note that there are several factors thatmay influence the behavior of a PID controller and the proper tuning parameters may vary from the factory defaults. PID regulationis the recommended method of control for the EVAPCO Controller.

Figure 50The various fan speed limits.

The Fan Speeds Screen shown in Figure 50 determine the various speeds at which the eco-Air unit runs in various modes. Notethat the fan speeds are set in percentage of the fan motor’s nameplate speed. The energy saving speed is not active unless theeco-Air unit is equipped with a pre-cooling system. The energy saving fan speed allows the pre-cooling system to activate once thefan speed reaches the energy saving value. Once the pre-cooling system is activated, the fan motors will continue to increase inspeed if the active setpoint is not met until the fan motors reach the maximum allowed fan speed. To disable the energy savingfunctionality, set the energy saving fan speed to the maximum allowed fan speed.

The quiet operation fan speed limits the speed of the fan motors whenever the Quiet Mode is activated. Quiet Mode may beactivated via the scheduler or a digital input. See Figure 57 for setup information.

The primary process setpoint.

The secondary process setpoint that may be activated via thescheduler, ambient temperature, or digital input.The proportional term of the PID.The integral term of the PID.The derivative term of the PID.

Set According toSpecification

85°F

4200


Table 13The parameters of the PID regulator.

SP1.m.spd

SP2.m.spd

GainTiTd

29


Figure 51The stage switch point temperatures.

If equipped with a pre-cooling system, the screen shown in Figure 51 will be accessible. The temperature switch points set aminimum temperature at which the pre-cooling system stages may become active. Note that this setting is not used for freezeprotection, but is instead intended to prevent the pads from operating during periods of the year when evaporativecooling is not required.

Table 15The stage switch point parameters.

The maximum speed that the fan motors will reach when QuietMode is not active.The maximum fan motor speed allowed when Quiet Mode isactivated via the scheduler or digital input.The fan speed at which the pre-cooling system will activate.The minimum speed at which the fan motors will spin.

100%

100%

100%0%


Table 14The parameters of the Fan Speeds Screen.

Max. Allowed

Quiet Operation

Energy SavingMin. Allowed

The minimum temperature above which the associated stageof the pre-cooling system may activate.

0°F Parameter Description Default

Stage 1-4

30


Figure 52The pre-cooling system on timers.

Figure 53The pre-cooling system minimum operating ambient temperature parameters.

Due to the orientation and low water usage of the pre-cooling system, it may take several minutes for the pre-cooling system tobecome fully effective. To prevent the pre-cooling system from cycling during short periods of time, a minimum run time for the pre-cooling system may be set. Once activated, the pre-cooling system will remain on until the minimum run time for the applicablestage is satisfied.

To help prevent the pre-cooling system from freezing, a minimum ambient operating temperature must be satisfied for the pre-cooling system to be active. If the ambient temperature falls below the minimum specified temperature, the pre-cooling system willdeactivate and will not become active again until the ambient temperature rises above the minimum specified temperature plus thespecified difference. For example, using the values shown in Figure 53, if the pre-cooling system is operating and the ambienttemperature falls below 40.0°F, the pre-cooling system will turn off and will not activate again until the ambient temperature reaches45.0°F. Note that all pipework that is susceptible to freezing must be heat traced in order to avoid damage.

Enables or disables the stage minimum on timers.

The minimum amount of time that the pre-cooling stageremains on once activated.

Yes

1200 seconds


Table 16The pre-cooling stage on time parameters.

Enable Stage On Time

Stage 1-4

31


Figure 54The Increase and Decrease Timer Parameters Screen.

In order to prevent minor fluctuations in the process temperature from quickly cycling the pre-cooling system on and off, anincrease and decrease timer is used. For example, using the values shown in Figure 54 and assuming a process setpointtemperature of 95.0°F, the process temperature must remain above 95.0°F for 15 seconds before the pre-cooling system willactivate. Conversely, if the pre-cooling system is active, the process temperature must remain below 95.0°F for 15 seconds beforethe pre-cooling system deactivates.

The minimum temperature at which the pre-cooling systemmay operate.Determines the ambient temperature at which the pre-coolingsystem may activate.

40.0°F

5.0°F


Table 17A description of the pre-cooling system minimum operating ambient temperatures.

Setpoint

Difference

The following feature is only applicable for eco-Air units that are equipped with EC fan motors. In the event that the EC fan motorslose communication with the EVAPCO Controller, the EC fan motors have the ability to run at a predetermined speed. This isinitiated if communication is lost for a set amount of time. For example, if the failsafe function was enabled, the EC fan motors willrun at 100% after 30 seconds of no response from the controller. Note that due to the nature of Modbus communication, the delaytime should not be set below 5 seconds since there is an inherent latency.

The amount of time that the process temperature must remain above the process setpoint before the pre-coolingstage activates.The amount of time that the process temperature must remainbelow the process setpoint before the pre-cooling stagedeactivates.

15 seconds

15 seconds


Table 18A description of the increase and decrease timer parameters.

Increase Time

Decrease Time

32


Figure 55The EC Fan Fail Safe Screen.

A secondary setpoint may be used to control the process temperature and may be activated via the scheduler, an ambienttemperature, or a digital input. If the secondary setpoint is to be activated via a digital input, consult the supplied wiring diagram todetermine the proper wiring configuration. If the secondary setpoint is to be set via an ambient temperature, additional parameterswill be shown as seen in Figure 56. Consider a situation where the secondary setpoint will become active when the ambienttemperature is 60.0°F with a differential temperature of 1.0°F. Until the ambient temperature reaches 61.0°F (the ambient setpointplus the differential), the primary setpoint will be used. Once the ambient temperature increases to 61.0°F, the secondary setpointwill become active until the ambient temperature drops below 60°F.

Enables or disables the failsafe feature.The amount of time that must elapse before the failsafe featureis activated.The fan motor speed at which the fans will run if the failsafefeature is initiated.

No30 seconds

100%


Table 19The failsafe mode parameters.

Enable FailsafeDelay Time

Speed

Figure 56The Secondary Setpoint Trigger Selection Screen is set to ambient.

33


The Quiet Mode limits the maximum allowable fan speed and may be activated via the scheduler or a digital input. To set themaximum fan speed allowed in Quiet Mode, please see Figure 50. If Quiet Mode is to be activated via a digital input, consult thesupplied wiring diagram to determine the proper wiring configuration. Note that limiting the maximum fan speed will impact thethermal performance of the eco-Air unit. Figure 57 allows the Quiet Mode trigger to be set.

The EVAPCO Controller may be configured to activate the attached eco-Air unit in several different manners: locally via theoperator interface, via a digital input, or via a building management system. Consult the supplied wiring diagram for the properwiring configuration should a digital input or the building management method of control are desired to be utilized. By default, theEVAPCO Controller will be set to local control via the operator interface. Note that is possible to use a building managementsystem to only monitor the EVAPCO Controller while setpoints and on/off control is done locally at the operator interface.

Sets the secondary setpoint trigger as disable, ambienttemperature, scheduler, or digital input.The temperature above which the secondary setpoint istriggered.Used in combination with the ambient setpoint to determine aband at which the secondary setpoint is active.

Disable

0.0°F

0.0°F


Table 20The secondary setpoint trigger parameters.

Setpoint 2 TriggerAmbient SetpointAmbient

Differential

Figure 57The Quiet Mode Trigger Selection Screen.

Sets the quiet mode trigger as disable, scheduler, or digital input. Disable


Table 21The possible parameters for the Quiet Mode trigger.

Quiet Mode Trigger

34


Figure 58The Unit Activation Selection Screen.

The EVAPCO Controller contains an internal buzzer that will sound in the event of an error or alarm. The buzzer may be activatedvia the screen shown in Figure 59.

Manual Management allows several operations of the EVAPCO Controller to be manually triggered or controlled. Note that whilebeing controlled manually, the EVAPCO Controller will not have the ability to maintain a specific process setpoint. The AnalogOutput of Fans Screen allows the fan speed to be manually adjusted to any speed between 0% and 100% once the ManualManagement function is enabled.

Allows the eco-Air unit to be activated via a digital input.Allows the eco-Air unit to be activated via a BAS.

NoNo


Table 22The eco-Air unit activation parameters.

Digital InputSupervisor

Allows the buzzer to sound in the event of an alarm or error. Yes (Buzzer Off)Parameter Description Default

Table 23The buzzer configuration parameters.

Disable Buzzer

Figure 59The Buzzer Configuration Screen.

35


Figure 60The Manual Fan Speed Adjustment Screen.

The Override Stages Screen allows any stage of the pre-cooling system to be enabled or disabled manually. Note that manuallyoverriding the pre-cooling system stages ignores all automatic logic such as minimum ambient temperature and minimum on timeonce activated.

Enables or disables the manual fan speed.

The manual fan speed setpoint.

Disable

0%

ManualManagement

Manual Speed

Description DefaultParameter

Table 24The manual fan speed parameters.

Manually opens or closes the pre-cooling system valve. OPENParameter Description Default

Table 25The pre-cooling system manual override parameters.

Stage 1-4

Figure 61The Override Pre-cooling Stages Screen.

36


The Override Stages Screen allows the ability to do the following:

• Force the fan motors to run at the maximum allowable speed (Figure 50),• Force a pre-cooling system flush (Figure 31), and• Force EC fan motors to reverse rotation at the speed specified in Figure 60.

All EVAPCO Controllers are able to communicate with a BAS via Modbus RTU. Consult the supplied wiring diagram for the properwiring configuration. The BAS configuration screen allows the various Modbus communication parameters to be set.

Figure 62The Manual Overrides Screen.

Figure 63The Modbus Parameter Configuration Screen.

Within the service settings submenu, there are several screens that allow for the adjustment of the working hours and sensor probevalues. The Working Hours Set Screen allows the working hours to be adjusted or set to zero as a reset. This could be used toreset an hour counter after maintenance or inspection has been performed.

The baud rate of the Modbus RTU signal: 1200, 2400, 4800,9600, 19200, 38400.The node address of the EVAPCO Controller: 1 to 207.The parity of the Modbus RTU signal: NONE, EVEN, ODDThe number of stop bits: 1 or 2.

19200

1EVEN

1


Table 26The Modbus RTU communication parameters.

Baud Rate

AddressParity

Stop Bit

37


The value of the process temperature and ambient temperature sensors may be adjusted with a linear offset if required via thescreen shown in Figure 65.

Figure 64The Working Hours Set Screen.

Figure 65The Probe Adjustment Screen.

The error log shown in Figure 35 may be cleared via the screen shown in Figure 66. Select YES to initiate the delete of the error log.

Figure 66The Error Log Clear Screen.

38


Figure 68The Information Screens.

The password to access the Service Screens may be set by the screen shown in Figure 67. Note that there is no way to recover acustom password and a complete initialization/reset of the EVAPCO Controller is required to change the password back to thedefault. The password shown on the screen is the current password.

The information screens display contain version details about the program loaded into the EVAPCO Controller and about theEVAPCO Controller itself. This information is read only and may be asked for when troubleshooting.

Figure 67The Change Password Screen.

The working hours screen displays the current working hours of the fan motors and pre-cooling system valves since the last resetof the working hours. To reset the working hours, see Figure 64.

Figure 69The Working Hours Screen.

39


In order to view or perform an I/O test, the eco-Air unit must be switched off (Figure 28). The test must first be enabled. After beingenabled, the digital outputs may be manually enabled or disabled. Note that enabling an output will cause the device attached tothe output to function.

When equipped with EC fan motors, it may be necessary to replace a fan motor. When an EC fan motor ships from themanufacturer, it is programmed with a default Modbus address of 1. Once the replace fan configuration submenu is chosen,navigate to the fan that needs to be replaced. Use the UP or DOWN buttons to navigate between the different fan addresses. Next,set the current address to 1 and set change now to YES. After a several minutes, several messages will be displayed as describedin Table 27. Cycle power to both the EVAPCO Controller and the newly replaced EC fan motor. The new EC fan will now beprogrammed to the proper Modbus address.

Figure 70The I/O Test Screen.

Figure 71An example of replacing EC fan motor number four.

Rebooting fan firmwareFan electronics are rebootingController is attempting to reconnect with fan motorFan motor is programmed with new address

Message Action

Table 27The messages seen while assigning a new address to an EC fan motor.

Reboot FWWait offlineWait online

End procedure

40


Manufacturer Screens

The Manufacturer Screens are for use by EVAPCO authorized factory technicians to configure the EVAPCO Controller.

Figure 72The manufacturer menu within the main menu.

41


Terminology

BAS (Building Automation System): A system that allows users to control multiple equipment from a central location.

PID (Proportional-Integral-Derivative) Controller: A control loop feedback mechanism used in industrial control systems. Byadjusting control outputs, a PID controller attempts to minimize the difference between a measured process variable and a desiredsetpoint.

PLC (Programmable Logic Controller): A programmable microprocessor that performs switching, timing, and process control tasks.

VFD (Variable Frequency Drive): A controller that drives an electric motor by varying the input frequency and voltage to theelectric motor.

42


Alarm Event Description

The sensor probe connected to universal input U1 is not providing the expected feedback.The sensor probe connected to universal input U2 is not providing the expected feedback.The sensor probe connected to universal input U3 is not providing the expected feedback.The sensor probe connected to universal input U4 is not providing the expected feedback.The sensor probe connected to universal input U5 is not providing the expected feedback.The controller internal clock board is malfunctioning.The controller internal memory is malfunctioning.The power for the pre-cooling system valves is not active.The controller is unable to communicate with EC fan motor 1.The controller is unable to communicate with EC fan motor 2.The controller is unable to communicate with EC fan motor 3.The controller is unable to communicate with EC fan motor 4.The controller is unable to communicate with EC fan motor 5.The controller is unable to communicate with EC fan motor 6.The controller is unable to communicate with EC fan motor 7.The controller is unable to communicate with EC fan motor 8.The controller is unable to communicate with EC fan motor 9.The controller is unable to communicate with EC fan motor 10.The controller is unable to communicate with EC fan motor 11.The controller is unable to communicate with EC fan motor 12.The controller is unable to communicate with EC fan motor 13.The controller is unable to communicate with EC fan motor 14.The controller is unable to communicate with EC fan motor 15.The controller is unable to communicate with EC fan motor 16.The controller is unable to communicate with EC fan motor 17.The controller is unable to communicate with EC fan motor 18.The controller is unable to communicate with EC fan motor 19.The controller is unable to communicate with EC fan motor 20.

Alarm DescriptionAlarm Probe 1Alarm Probe 2Alarm Probe 3Alarm Probe 4Alarm Probe 5

Clock Board FaultExtended Memory FaultElectrical Fault Valves

Offline EBM Fan 1Offline EBM Fan 2Offline EBM Fan 3Offline EBM Fan 4Offline EBM Fan 5Offline EBM Fan 6Offline EBM Fan 7Offline EBM Fan 8Offline EBM Fan 9

Offline EBM Fan 10Offline EBM Fan 11Offline EBM Fan 12Offline EBM Fan 13Offline EBM Fan 14Offline EBM Fan 15Offline EBM Fan 16Offline EBM Fan 17Offline EBM Fan 18Offline EBM Fan 19Offline EBM Fan 20

43


Notes:

EVAPCO, Inc. • P.O. Box 1300 • Westminster, MD 21158 USAPHONE: 410-756-2600 • FAX: 410-756-6450 • E-MAIL: [email protected]

©2018 EVAPCO, Inc.

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Documents

EVAPCO Controller Users Manual...EVAPCO eco-Air fluid coolers are supplied with a thermowell (1/4” G threads) and a NTC temperature sensor. The thermowell and temperature sensor