1 of 12 © A 364 - 07/01
- Application BrochureUniversal Reset Control 364
A 36407/01
120 V (ac)
24 V (ac)
Mix Demand
Boiler Demand
DHW Demand
Setpoint Demand
WWSD
Min / Max
Melting
Universal Reset Control 364Mixing, Boiler & DHW 158033
Menu Item
Features of the Universal Reset Control 364Please refer to Essay E 005: Control Functions and Benefits for a detailed description of these features.
ApplicationThe Universal Reset Control 364 is designed to maximize the comfort and efficiency provided by a hydronic heating system. The control automatically adjusts the boiler and mixed loop water temperatures that are delivered to the heating system by using outdoor reset. For a mixing device, the 364 can use either a vari-able speed injection pump or a floating action mixing valve. The mixed water temperature can be used to supply either a space heating system or a single zone snow melting system. The 364 is capable of controlling an indirect Domestic Hot Water (DHW) storage tank and / or a setpoint load. The temperature of individual zones can be controlled by connecting either a conventional thermostat system or a tekmar zone control to the 364.
� Characterized Heating Curve� Indoor Temperature Feedback� Warm Weather Shut Down� Boiler Outdoor Reset� Boiler Differential (Automatic)� Boiler Minimum Supply� Boiler Post Purge� Fire Delay� Boiler Mass� Boiler Enable� DHW Boiler Reset Override� DHW Priority� DHW Priority Override� DHW Post Purge
� DHW Mixing Purge� Setpoint Boiler Reset Override� Mixing Outdoor Reset� Floating Action Output� Variable Speed Output� Boiler Protection� System Protection� Boiler Load Reset� Slab Protection� Slab Outdoor Reset� Snow Melting Setpoint� Snow Idling Setpoint� Cold Weather Cut Off� Pump / Integrated Exercising
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© 2001
A 364 - 07/01
2 of 12
Concept DrawingThis is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system. It is up to the system designer to determine the necessary components for and configuration of the particular system being designed, including additional equipment, isola-tion relays (for loads greater than the control’s specified output ratings), and any safety devices which in the judgement of the designer are appropriate, in order to properly size, configure and design that system and to ensure compliance with building and safety code requirements.
tekmar Control Systems Ltd., Canada; tekmar Control Systems, Inc., U.S.A.; www.tekmarcontrols.comHead Office: 4611-23rd Street, Vernon, B.C. Canada, V1T 4K7; (250) 545-7749 Fax (250) 545-0650
- Application Mechanical
120 V (ac)
24 V (ac)
M MM
M M M
Remote Display Module (D1) 040
Outdoor Sensor(S1) 070
Boiler SupplySensor (S2) 071P1
P2
P4P3
V1
Z3 Z2 Z1
T3 T2 T1
Z6 Z5 Z4
T6 T5 T4
Mix SupplySensor (S3) 071
P5
A1
DHWTank
364
Class II Transformer
System OperationThe Universal Reset Control 364 provides full outdoor reset to three (or more) mixed zones and partial outdoor reset to three (or more) boiler zones. The output of the variable speed injection pump is modulated to provide a mixed supply water temperature to the mixed zones, and protect the boiler from flue gas condensation. The 364 also controls the supply of heat to an indirect Domestic Hot Water (DHW) tank. The boiler operates at the required temperature in order to satisfy all loads.
A1 = AquastatD1 = Remote Display Module 040P1 = Primary PumpP2 = Boiler System PumpP3 = Mix System PumpP4 = Variable Speed Injection PumpP5 = DHW PumpS1 = Outdoor Sensor 070S2 = Boiler Supply Sensor 071S3 = Mix Supply Sensor 071T1, .., T6 = ThermostatsV1 = Balancing Valve or Globe ValveZ1, .., Z3 = Mix Zone ValveZ4, .., Z6 = Boiler Zone Valve
A 364-107/01
3 of 12
© 2001
A 364 - 07/01
Concept DrawingThis is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system. It is up to the system designer to determine the necessary components for and configuration of the particular system being designed, including additional equipment, isola-tion relays (for loads greater than the control’s specified output ratings), and any safety devices which in the judgement of the designer are appropriate, in order to properly size, configure and design that system and to ensure compliance with building and safety code requirements.
tekmar Control Systems Ltd., Canada; tekmar Control Systems, Inc., U.S.A.; www.tekmarcontrols.comHead Office: 4611-23rd Street, Vernon, B.C. Canada, V1T 4K7; (250) 545-7749 Fax (250) 545-0650
- Application Electrical A 364-107/01
Essential Control SettingsDIP Switch = Mixing Reset MIX 10K = NONEMIXING = VAR Boil SENS = SUPDHW THRU = PUMP DHW SENS = NONE
C24 V (ac)R
N120 V (ac)
Class IITransformer
L
S1S2S3
D1
Boiler
Zone ValveMotor EndSwitches
P1A1
Z1...Z3 Z4...Z6
P2 P3 P5 P4
1Mix Power
DemandBoil SysPmp P2
DHW BoilerPmp/Vlv
Mix SysPmp P3
2 3BoilDem
4ComDem
5Setp/DHW
6
N LPrimP1
9 10 1211 13 14 15 16 17PwrMix
18Opn
19Cls/Var
7 8Do not apply power
3642.4A10A 10A 10A 10A 10A 10A
20Com
21Mix10K
22MixRet
23MixSup
24Com
25BoilZo in
26Boil
27Com
28DHW
29Out
30tN2
A1 = AquastatD1 = Remote Display Module 040P1 = Primary PumpP2 = Boiler System PumpP3 = Mix System PumpP4 = Variable Speed Injection PumpP5 = DHW PumpS1 = Outdoor Sensor 070S2 = Boiler Supply Sensor 071S3 = Mix Supply Sensor 071T1, .., T6 = ThermostatsV1 = Balancing Valve or Globe ValveZ1, .., Z3 = Mix Zone ValveZ4, .., Z6 = Boiler Zone Valve
© 2001
A 364 - 07/01
4 of 12
Concept DrawingThis is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system. It is up to the system designer to determine the necessary components for and configuration of the particular system being designed, including additional equipment, isola-tion relays (for loads greater than the control’s specified output ratings), and any safety devices which in the judgement of the designer are appropriate, in order to properly size, configure and design that system and to ensure compliance with building and safety code requirements.
tekmar Control Systems Ltd., Canada; tekmar Control Systems, Inc., U.S.A.; www.tekmarcontrols.comHead Office: 4611-23rd Street, Vernon, B.C. Canada, V1T 4K7; (250) 545-7749 Fax (250) 545-0650
- Application Mechanical A 364-207/01
System OperationThe Universal Reset Control 364 provides full outdoor reset to three (or more) mixed zones and partial outdoor reset to three (or more) boiler zones. The position of the mixing valve is modulated to provide a mixed supply water temperature to the mixed zones, and protect the boiler from flue gas condensation. The 364 also controls the supply of heat to an indirect Domestic Hot Water (DHW) tank. The boiler operates at the required temperature in order to satisfy all loads.
M M M
Remote DisplayModule (D1) 040
Outdoor Sensor(S2) 070
BoilerSupplySensor (S3) 071
P1
P2
V2
C1
S1
DHWTank
V3
Z3 Z2 Z1
T3 T2 T1R3 R2 R1
Z6 Z5 Z4
T6 T5 T4
Mix SupplySensor (S4) 071
V1M
∆P
M
120 V (ac)
24 V (ac)
364
Class II Transformer
C1 = Actuating Motor 011D1 = Remote Display Module 040P1 = Primary PumpP2 = Boiler System PumpR1, .., R3 = Relay 003S1 = DHW Sensor 071S2 = Outdoor Sensor 070S3 = Boiler Supply Sensor 071S4 = Mix Supply Sensor 071T1, .., T6 = ThermostatsV1 = DHW ValveV2 = 4-Way Mixing ValveV3 = Balancing Valve or Pressure Bypass ValveZ1, .., Z3 = Mix Zone PumpZ4, .., Z6 = Boiler Zone Valve
5 of 12
© 2001
A 364 - 07/01
Concept DrawingThis is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system. It is up to the system designer to determine the necessary components for and configuration of the particular system being designed, including additional equipment, isola-tion relays (for loads greater than the control’s specified output ratings), and any safety devices which in the judgement of the designer are appropriate, in order to properly size, configure and design that system and to ensure compliance with building and safety code requirements.
tekmar Control Systems Ltd., Canada; tekmar Control Systems, Inc., U.S.A.; www.tekmarcontrols.comHead Office: 4611-23rd Street, Vernon, B.C. Canada, V1T 4K7; (250) 545-7749 Fax (250) 545-0650
- Application Electrical A 364-207/01
Essential Control SettingsDIP Switch = Mixing Reset MIX 10K = NONE Boil SENS = SUP DHW THRU = VALVDHW SENS = DHW MIXING = FLOT
S3S4
Boiler
Zone ValveMotor EndSwitches
P1
Z4...Z6
P2 V1
C1
S1
S2
D1
ComC
Opnlimit
Clslimit
AuxSw
AuxSw
1 2 3 4 5 6 7Opn Cls
M 011
1Mix Power
DemandBoil SysPmp P2
DHW BoilerPmp/Vlv
Mix SysPmp P3
2 3BoilDem
4ComDem
5Setp/DHW
6
N LPrimP1
9 10 1211 13 14 15 16 17PwrMix
18Opn
19Cls/Var
7 8Do not apply power
3642.4A10A 10A 10A 10A 10A 10A
20Com
21Mix10K
22MixRet
23MixSup
24Com
25BoilZo in
26Boil
27Com
28DHW
29Out
30tN2
T1
T2
T3
Z1
Z2
Z3
R1
R2
R3
M
Class IITransformer
C24 V (ac)R
N120 V (ac) L
7812
6543
7812
6543
7812
6543
C1 = Actuating Motor 011D1 = Remote Display Module 040P1 = Primary PumpP2 = Boiler System PumpR1, .., R3 = Relay 003S1 = DHW Sensor 071S2 = Outdoor Sensor 070S3 = Boiler Supply Sensor 071S4 = Mix Supply Sensor 071T1, .., T6 = ThermostatsV1 = DHW ValveV2 = 4-Way Mixing ValveV3 = Balancing Valve or Pressure Bypass ValveZ1, .., Z3 = Mix Zone PumpZ4, .., Z6 = Boiler Zone Valve
© 2001
A 364 - 07/01
6 of 12
Concept DrawingThis is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system. It is up to the system designer to determine the necessary components for and configuration of the particular system being designed, including additional equipment, isola-tion relays (for loads greater than the control’s specified output ratings), and any safety devices which in the judgement of the designer are appropriate, in order to properly size, configure and design that system and to ensure compliance with building and safety code requirements.
tekmar Control Systems Ltd., Canada; tekmar Control Systems, Inc., U.S.A.; www.tekmarcontrols.comHead Office: 4611-23rd Street, Vernon, B.C. Canada, V1T 4K7; (250) 545-7749 Fax (250) 545-0650
- Application Mechanical A 364-307/01
System OperationThe Universal Reset Control 364 provides partial outdoor reset to three (or more) boiler zones and snow melting for a single zone system. The output of the variable speed injection pump is modulated to mix down the boiler supply fluid temperature to protect the slab from thermal stress and to protect the boiler from flue gas condensation. The 364 also controls the supply of heat to an indirect Domestic Hot Water (DHW) tank. The boiler operates at the required temperature in order to satisfy all loads.
A1 = AquastatD1 = Remote Start/Stop Module 039P1 = Primary PumpP2 = Boiler System PumpP3 = Mix System PumpP4 = Variable Speed Injection PumpP5 = DHW PumpS1 = Outdoor Sensor 070S2 = Boiler Supply Sensor 071S3 = Slab Sensor 072/073S4 = Mix Return Sensor 071S5 = Mix Supply Sensor 071T1, .., T3 = ThermostatsV1 = Balancing Valve or Globe ValveZ1, .., Z3 = Boiler Zone Valve
MM M
120 V (ac)
Outdoor Sensor(S1) 070
Remote Start /Stop Module (D1) 039
Slab Sensor (S3) 072/073
Mix Return Sensor (S4) 071
Mix Supply Sensor (S5) 071
Boiler Supply Sensor (S2) 071P3 P4
Z3 Z2 Z1
T3 T2 T1
P1
P2P5
A1
DHWTank
V1
24 V (ac)
364
Class II Transformer
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© 2001
A 364 - 07/01
Concept DrawingThis is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system. It is up to the system designer to determine the necessary components for and configuration of the particular system being designed, including additional equipment, isola-tion relays (for loads greater than the control’s specified output ratings), and any safety devices which in the judgement of the designer are appropriate, in order to properly size, configure and design that system and to ensure compliance with building and safety code requirements.
tekmar Control Systems Ltd., Canada; tekmar Control Systems, Inc., U.S.A.; www.tekmarcontrols.comHead Office: 4611-23rd Street, Vernon, B.C. Canada, V1T 4K7; (250) 545-7749 Fax (250) 545-0650
- Application Electrical A 364-307/01
Essential Control SettingsDIP Switch = Snow Melting MIXING = VARMIX 10K = SLAB DHW SENS = NONEBoil SENS = SUPDHW THRU = PUMP
C24 V (ac)R
N120 V (ac)
Class IITransformer
L
S1S2
Boiler
Zone ValveMotor EndSwitches
P1A1
Z1...Z3
P2 P3 P5 P4
S3
S4
S5
D1
1Mix Power
DemandBoil SysPmp P2
DHW BoilerPmp/Vlv
Mix SysPmp P3
2 3BoilDem
4ComDem
5Setp/DHW
6
N LPrimP1
9 10 1211 13 14 15 16 17PwrMix
18Opn
19Cls/Var
7 8Do not apply power
3642.4A10A 10A 10A 10A 10A 10A
20Com
21Mix10K
22MixRet
23MixSup
24Com
25BoilZo in
26Boil
27Com
28DHW
29Out
30tN2
A1 = AquastatD1 = Remote Start/Stop Module 039P1 = Primary PumpP2 = Boiler System PumpP3 = Mix System PumpP4 = Variable Speed Injection PumpP5 = DHW PumpS1 = Outdoor Sensor 070S2 = Boiler Supply Sensor 071S3 = Slab Sensor 072/073S4 = Mix Return Sensor 071S5 = Mix Supply Sensor 071T1, .., T3 = ThermostatsV1 = Balancing Valve or Globe ValveZ1, .., Z3 = Boiler Zone Valve
© 2001
A 364 - 07/01
8 of 12
Concept DrawingThis is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system. It is up to the system designer to determine the necessary components for and configuration of the particular system being designed, including additional equipment, isola-tion relays (for loads greater than the control’s specified output ratings), and any safety devices which in the judgement of the designer are appropriate, in order to properly size, configure and design that system and to ensure compliance with building and safety code requirements.
tekmar Control Systems Ltd., Canada; tekmar Control Systems, Inc., U.S.A.; www.tekmarcontrols.comHead Office: 4611-23rd Street, Vernon, B.C. Canada, V1T 4K7; (250) 545-7749 Fax (250) 545-0650
- Application Mechanical A 364-407/01
System OperationThe Universal Reset Control 364 and the Boiler Control 262 are combined to provide full outdoor reset to three (or more) mixed zones and partial outdoor reset to three (or more) boiler zones. The position of the mixing valve is modulated to provide a mixed supply water temperature to the mixed zones and protect the boiler from flue gas condensation. The 364 also controls the supply of heat to an indirect Domestic Hot Water (DHW) tank. The boilers operate at the required temperature in order to satisfy all loads.
A1 = AquastatC1 = Actuating Motor 011P1 = Primary PumpP2 = Boiler System PumpP3 = DHW PumpR1, .., R3 = Relay 003S1 = Boiler Supply Sensor 071S2, S3 = Outdoor Sensor 070S4 = Boiler Return Sensor 071S5 = Mix Supply Sensor 071T1, .., T6 = ThermostatsV1 = 4-Way Mixing ValveZ1, .., Z3 = Mix Zone PumpZ4, .., Z6 = Boiler Zone Valve
M M M
Outdoor Sensor(S3) 070
Outdoor Sensor(S2) 070
Boiler Return Sensor (S4) 071
Boiler SupplySensor (S1) 071
Mix SupplySensor (S5) 071 P1
P2
V1
C1 P3
Z3 Z2 Z1
R3 R2 R1T3 T2 T1
Z6 Z5 Z4
T6 T5 T4
A1
120 V (ac)
24 V (ac)
364 262
M
Class II Transformer
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© 2001
A 364 - 07/01
Concept DrawingThis is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system. It is up to the system designer to determine the necessary components for and configuration of the particular system being designed, including additional equipment, isola-tion relays (for loads greater than the control’s specified output ratings), and any safety devices which in the judgement of the designer are appropriate, in order to properly size, configure and design that system and to ensure compliance with building and safety code requirements.
tekmar Control Systems Ltd., Canada; tekmar Control Systems, Inc., U.S.A.; www.tekmarcontrols.comHead Office: 4611-23rd Street, Vernon, B.C. Canada, V1T 4K7; (250) 545-7749 Fax (250) 545-0650
- Application Electrical A 364-407/01
Essential Control Settings364: DIP Switch = Mixing Reset 262: MODE = 1 MIXING = FLOT STAGE 1 = AUTO Boil SENS = RET STAGE 2 = AUTO DHW THRU = VALV DHW SENS = NONE
S5
A1
C1
Zone ValveMotor EndSwitches
Z4...Z6
S4 S3
ComC
Opnlimit
Clslimit
AuxSw
AuxSw
1 2 3 4 5 6 7Opn Cls
M 011
Boiler#1
Boiler#2
S1
S2
T1
T2
T3
Z1
Z2
Z3
R1
R2
R3
Class IITransformer
C24 V (ac)R
N120 V (ac) L
P1 P2 P3
1Mix Power
DemandBoil SysPmp P2
DHW BoilerPmp/Vlv
Mix SysPmp P3
2 3BoilDem
4ComDem
5Setp/DHW
6
N LPrimP1
9 10 1211 13 14 15 16 17PwrMix
18Opn
19Cls/Var
7 8Do not apply power
3642.4A10A 10A 10A 10A 10A 10A
20Com
21Mix10K
22MixRet
23MixSup
24Com
25Boil
Zo in
26Boil
27Com
28DHW
29Out
30tN2
10A 10A 10A 10A 262
1Boiler Power
DemandDHW Stage Stage
Pmp/Vlv
2 3ComDem
4DHWDem
5SetpDem
6
N
7
L
8BoilP1
9 10 11
1
12
1
13
2
14
2
Do not apply power
15tN1/tN2
16Com
1710K
18UnOSw
19Com
20DHW
21Boil
22Out
7812
6543
7812
6543
7812
6543
A1 = AquastatC1 = Actuating Motor 011P1 = Primary PumpP2 = Boiler System PumpP3 = DHW PumpR1, .., R3 = Relay 003S1 = Boiler Supply Sensor 071S2, S3 = Outdoor Sensor 070S4 = Boiler Return Sensor 071S5 = Mix Supply Sensor 071T1, .., T6 = ThermostatsV1 = 4-Way Mixing ValveZ1, .., Z3 = Mix Zone PumpZ4, .., Z6 = Boiler Zone Valve
© 2001
A 364 - 07/01
10 of 12
Concept DrawingThis is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system. It is up to the system designer to determine the necessary components for and configuration of the particular system being designed, including additional equipment, isola-tion relays (for loads greater than the control’s specified output ratings), and any safety devices which in the judgement of the designer are appropriate, in order to properly size, configure and design that system and to ensure compliance with building and safety code requirements.
tekmar Control Systems Ltd., Canada; tekmar Control Systems, Inc., U.S.A.; www.tekmarcontrols.comHead Office: 4611-23rd Street, Vernon, B.C. Canada, V1T 4K7; (250) 545-7749 Fax (250) 545-0650
- Application Mechanical A 364-507/01
System OperationThe Universal Reset Control 364 and two Zone Control 368’s are combined to provide full outdoor reset to four mixed zones and partial outdoor reset to four boiler zones. The output of the variable speed injection pump is modulated to provide a mixed supply water temperature to the mixed zones, and protect the boiler from flue gas condensation. The 364 also controls the supply of heat to an indirect Domestic Hot Water (DHW) tank. The boiler operates at the required temperature in order to satisfy all loads.
A1 = AquastatD1 = Remote Display Module 040P1 = Primary PumpP2 = Variable Speed Injection PumpP3 = Mix System PumpP4 = DHW PumpS1 = Outdoor Sensor 070S2 = Boiler Supply Sensor 071S3 = Mix Supply Sensor 071V1 = Balancing Valve or Globe ValveZ1, .., Z4 = Mix Zone ValvesZ5, .., Z8 = Boiler Zone Pumps
Outdoor Sensor(S1) 070
Remote DisplayModule (D1) 040
P3 P2 P1
Z8 Z7 Z6 Z5Z4 Z3 Z2 Z1
P4
A1
DHWTank
Boiler SupplySensor (S2) 071
Mix SupplySensor (S3) 071
V1
120 V (ac)
24 V (ac)
RTU's 054RTU's 054
M M M M
Class II Transformer
368 368 364
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© 2001
A 364 - 07/01
Concept DrawingThis is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system. It is up to the system designer to determine the necessary components for and configuration of the particular system being designed, including additional equipment, isola-tion relays (for loads greater than the control’s specified output ratings), and any safety devices which in the judgement of the designer are appropriate, in order to properly size, configure and design that system and to ensure compliance with building and safety code requirements.
tekmar Control Systems Ltd., Canada; tekmar Control Systems, Inc., U.S.A.; www.tekmarcontrols.comHead Office: 4611-23rd Street, Vernon, B.C. Canada, V1T 4K7; (250) 545-7749 Fax (250) 545-0650
- Application Electrical
Class IITransformer
C24 V (ac)R
N120 V (ac) L
Boiler
P1A1Z1 Z3
Z2 Z4
Z5 Z7
Z6 Z8
P3 P4 P2
S2S3
S1
D1
H
H
H
H
H
H
H
H
MM
MM
1Mix Power
DemandBoil SysPmp P2
DHW BoilerPmp/Vlv
Mix SysPmp P3
2 3BoilDem
4ComDem
5Setp/DHW
6
N LPrimP1
9 10 1211 13 14 15 16 17PwrMix
18Opn
19Cls/Var
7 8Do not apply power
3642.4A10A 10A 10A 10A 10A 10A
20Com
21Mix10K
22MixRet
23MixSup
24Com
25BoilZo in
26Boil
27Com
28DHW
29Out
30tN2
1System Power
Pmp
2
Pmp
3
N
4
L
15Com1-2
16
1
17
2
18Com3-4
19
3
20
4
Do not apply power
5ComSen
6RTU
1
7RTU
2
8ComSen
9RTU
3
10RTU
4
11UnOSw
12ZoOut
13ComSen
14ZoIn
6A6A6A 368
1System Power
Pmp
2
Pmp
3
N
4
L
15Com1-2
16
1
17
2
18Com3-4
19
3
20
4
Do not apply power
5ComSen
6RTU
1
7RTU
2
8ComSen
9RTU
3
10RTU
4
11UnOSw
12ZoOut
13ComSen
14ZoIn
6A6A6A 368
A 364-507/01
Essential Control Settings364: DIP Switch = Mixing Reset MIX 10K = ZOIN MIXING = VAR Boil SENS = SUP DHW THRU = PUMP DHW SENS = NONE
A1 = AquastatD1 = Remote Display Module 040P1 = Primary PumpP2 = Variable Speed Injection PumpP3 = Mix System PumpP4 = DHW PumpS1 = Outdoor Sensor 070S2 = Boiler Supply Sensor 071
S3 = Mix Supply Sensor 071V1 = Balancing Valve or Globe ValveZ1, .., Z4 = Mix Zone ValvesZ5, .., Z8 = Boiler Zone Pumps
Product design, software and literature are Copyright © 2001 by:tekmar Control Systems Ltd. and tekmar Control Systems, Inc.
All specifications are subject to change without notice.Printed in Canada. A 364 - 07/01.
Control Systems
tekmar Control Systems Ltd., Canadatekmar Control Systems, Inc., U.S.A.Head Office: 4611 - 23rd StreetVernon, B.C. Canada V1T 4K7(250) 545-7749 Fax. (250) 545-0650Web Site: www.tekmarcontrols.com
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Specifi cations
The following are the recommended specifications for the Universal Reset Control 364.
• The control shall provide two outdoor reset temperatures. The outdoor reset strategy shall be characterized to the heating system and shall have adjustments for the outdoor design temperature, indoor design temperature, design supply tempera-ture and terminal unit.
• The control shall have the option to directly operate a variable speed injection pump or a mixing valve with a floating action actuator motor.
• The control shall have the option to provide heat through the mixing device to either a space heating system or a snow melt-ing system.
• The control shall have an adjustable Minimum Supply water temperature setting to help prevent condensation of flue gases and subsequent corrosion and blockage of the boiler’s heat exchanger and chimney.
• During extended periods of inactivity, the pumps and valves that are operated by the control shall be periodically exercised to prevent seizure during long idle periods.
• The control shall provide heat to the space heating system as needed unless the outdoor air temperature is warmer than the control’s Warm Weather Shut Down (WWSD) temperature setting.
• The control shall have the option of an automatic differential calculation for the operation of a single boiler in order to prevent short cycling.
• The control shall have the ability to directly control the boiler supply temperature or to send a boiler enable signal to another boiler operating control to allow for a staging control to be connected.
• The control shall have four separate lockable access levels to limit the number of adjustments available to various users.
• The control shall have a test button that activates a pre-programmed test sequence testing all of the control’s outputs.
• The control shall show a number of current sensor temperatures depending on the access level that has been selected.
• The control shall continuously monitor its temperature sensors and provide an error message upon a control or sensor failure.
• The control shall have the option of connecting a Remote Display Module to allow for remote monitoring and adjustment of the control.
• The control shall have the ability to operate a domestic hot water (DHW) system that uses either a zone valve or pump to control the flow to the DHW heat exchanger.
• The control shall have the ability to provide DHW priority and to limit the maximum allowed DHW priority period based on the outdoor air temperature.
• The control shall have the option of using either a DHW aquastat or a DHW sensor to control the DHW tank temperature.
• When operating a snow melting system, the control shall have the ability to limit the rate of rise of the snow melting supply temperature in order to prevent thermal shock of the snow melting system.
• The control shall have the ability to limit the amount of cool water being returned to the boiler through the mixing device in order to prevent low boiler operating temperatures and flue gas condensation.
• The control shall use slab outdoor reset when operating a snow melting system to prevent slab freeze up during sudden drops in outdoor temperature.
• The control shall have the option of connecting a Remote Start / Stop Module when operating in the snow melting mode.