1

IMPORTANTInstaller: This Manual is the property of the customer and

must be retained with the product formaintenance and operational purposes.

PRODUCT MANUAL

32rmx

2

INDEXpage

INTRODUCTION 3

DESCRIPTION 3

SAFETY WARNINGS 3

SPECIFICATIONImportant Points 4

DIMENSIONS 7

INSTALLATIONGeneral 8Commissioning 10Temperature Adjustment 10Circulating Flow Adjustment 11Reversed Inlets 12Top and Bottom Outlets 13

FAULT DIAGNOSIS 16

MAINTENANCEGeneral 20Removal/Installation Procedures 20

Cover Assembly 20Temperature Probe Assembly 20Potentiometer Assembly 21Control PCB Assembly 22Drive Unit 22

Internal Set 22Crank Arm Assembly 23Lower Seat 24

SPARE PARTSSpare Parts List 25Spare Parts Diagram 26/27

CUSTOMER CARE Back Cover

3

INTRODUCTIONThe 32rmx is a motorised mixing valve with electronic control. It is designed tocontrol the temperature of blend water in a multiple outlet distribution system, referto Figures 2 and 3.

DESCRIPTION

Rada products are precision-engineered and should give continued superior andsafe performance, provided:

1. They are installed, commissioned, operated and maintained in accordance withthe recommendations given in this Manual.

2. Periodic attention is given, as necessary, to maintain the product in goodfunctional order. Recommended guidelines are given in the MAINTENANCEsection.

The Rada 32rmx incorporates a "cold initiate" facility designed to provide a degreeof user protection against high water temperatures, should the power supply fail.The valve achieves this by storing reserve power adequate to close down its incominghot water supply, thereby allowing cold water only into the circuit.

SAFETY WARNINGS

4

SPECIFICATIONImportant Points1. The installation, commissioning and maintenance of this product must be carried

out in accordance with instructions given in this Manual, and must be conductedby designated, qualified and competent personnel.

2. Installations must comply with all Local/National Water Supply AuthorityRegulations/Bye-laws, and Building and Plumbing (UK:BS6700) Regulations.

3. Warning! Continued use of this product in conditions outside the limits listed inthis section can severely affect the performance and reduce the effective servicelife, and can present potential risk to users.

Design and Manufacturing Standard: BS3456.

Pressure Range: The Rada 32rmx requires nominally equal hot and cold waterpressures.

Maximum Static Pressure: 10 bar.

Maximum Operating Pressure: 7 bar Pressure Loss.

Blend Temperature Range

30 - 50oC (beyond these limits the performance accuracy reducesproportionately).

Environmental Conditions

Ambient Temperature Range: 0 - 60oC

Ambient Humidity Range: 0 - 100% RH

Electrical

Supply Voltage: 12V AC, through separate transformer, PT100 or PT220.

Power Consumption: 6 Watts.

Electronic Circuitry Protection: By 500mA Quick-blow fuse (fitted).

Cable Entry: Base threaded to accept 20 mm. conduit (not supplied).

Construction

Base: Gunmetal, nickel plated.

Cover Assembly: Aluminium, red textured painted finish, electrical chamberprotected against total immersion and ingress of dust to IP66.

Shuttle Connecting Rod and Seats: Stainless steel.

5

Hydraulics and Electronics Separation: Stainless steel flexible bellows masterseal plus three auxiliary "O" seals.

Bleed Hole: Provides early warning in the event of bellows or "O" seal deterioration.

Electronics: Plug in solid state microelectronic circuitry.

Motor: Low inertia servo motor with reduction gearbox protected by a currentlimiting circuit.

Temperature Probe Assembly: Interchangeable sub-assembly incorporating ahighly sensitive thermistor encapsulated in a rugged brass housing.

Temperature Display: Red, 2 digit LED display indicating outlet temperature.

Connections and Fixing

Connections: Inlet and outlet 1 1/4" BSP standard.

Configuration: Hot inlet on right, cold on left, top outlet.

Fixing: Designed for connection to exposed pipework, which must be adequatelysupported as the controller is not secured to any wall surface.

Interface

Allows input/output capability for remote monitoring and/or control, viaspecialised Rada control systems (Refer to; 830/840 Installation, Operation& Maintenance guide).

Care must be taken to ensure that other external signals or interferencedo not affect the 32rmx eletronics through this interface connection.

Performance

Circuit Temperature Control: Within + 2.0 oC of set temperature.

Digital Temperature Display Accuracy: + 1 oC within the range 30 oC - 60 oC.

Pressure Loss/Flow Rate

Pressure Loss/Flow Rate: (refer to Figure 1)

This is for the controller only at mid-blend and does not take account of pressureloss through checkvalves, in-line fittings, pipework or terminal fittings. Whencalculating the pump rate for the circuit allow 0.01 bar for pressure loss throughthe controller at 10 l/min.

6

FLOW RATE(litres/minute)

FLOW RATE(litres/minute)

PRESSURE LOSS (bar)

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

PRESSURE LOSS (bar)

1.0 2.0 3.0 4.0 5.0 6.0 7.0

Flow Rate/Pressure Loss GraphFigure 1

400

700

600

500

300

200

100

50

100

150

200

250

300

7

150

90

38

141

43

29

154

Dimensions in millimetres

127

DIMENSIONS

8

INSTALLATIONGeneralInstallation must be carried out in accordance with these instructions, andmust be conducted by designated, qualified and competent personnel.

1. Supply pipes must be flushed to clear debris before connecting the controller.

2. The plumbing circuit configuration should comply with relevant Rada guidancepublications.

3. With low pressure circuits care must be taken with circuit design to preventairlocks.

4. Do not use excessive force when making connections.

5. The Controller may be mounted in any attitude providing the temperature displayis visible and accessible for adjustment. Adjacent pipework should be rigidlysupported as the Controller has no wall bracket.

6. Supply pipework layout should be arranged to minimise the effect of hydraulicrestriction or other outlet usage upon the dynamic pressures at the mixing valveinlets. Recommended minimum supply line pipe diameter is 1" or 28 mm.

7. This product requires 13V AC supply. A separate transformer is available forthis purpose, reference PT100 (100/110V) or PT220 (220/240V). Installationdetails and specification are provided with each transformer (ref. P2623). TheRada 32rmx cable entry is threaded to accept 20 mm conduit if required, and ifused, a fitting that provides adequate sealing will be necessary.

8. When fitting the outlet pipe the thread must be of full form. This will prevent itfrom screwing too far into the valve and damaging the temperature probe, whichcan be seen protruding into the outlet bore.

9. Check that the valve bleed hole is not externally blocked. It can be foundopposite the outlet, just behind the base flange (refer to Figure 8). This is usedto give warnings of a leak in the bellows assembly. A secondary seal preventsingress of water to the electronics. If a leak is apparent the fault must be remediedwithout delay.

10. Prior to fitting the two modulating circuit dial thermometers, they should bechecked against each other at the intended circuit temperature. Any differenceshould be noted (see Circulating Flow Adjustment).

9

Strainer

Lockshield Valve

CheckvalveCold Water

Hot WaterDirect reading flowmeasurement andsetting Valve

Key to Symbols

Outlets

BlendCircuit

7.5m minimumto first outlet

Optionalbypassvalve

Pump Rada 32rmx

PressureReliefValve Hot

Water

Hightemp.circuit

Pressure Reducing Valve

Coldmain

Gate Valve Mira Thermometer Mixed Water

Schematic Arrangement (Unvented system)Figure 2

Outlets

BlendCircuit

7.5m minimumto first outlet

Optionalbypassvalve

Pump Rada 32rmx

StopValve

HotWater

Hightemp.circuit

Coldmain

ColdCistern

Schematic Arrangement (Vented system)Figure 3

10

Temperature AdjustmentFigure 4

CommissioningBefore turning on the electrical supply to the electronic valve, check the following:

1. Availability of hot water to the mixing valve.

2. Gate valves around the modulating circuit fully open.

Note! Bypass valve must be closed (if fitted).

3. The circulating pump and 32rmx transformer should be wired in parallel, fromthe same isolator unit.

4. If a time clock is used both the transformer and pump should be wired from thiscircuit, alternatively a cylinder mounted thermostat can be used to turn off thevalve when the hot water temperature approaches that of the blend. Operatingthe valve without hot water may shorten its life.

After checking the above turn on the electrical supply. The display will initially illuminatewith the outlet water temperature. The 32rmx will immediately turn to full hot toremove the deadleg of cold water in the hot line. It will then blend water atapproximately 45oC, as this temperature is set at the Factory before despatch.

Temperature Adjustment1. Allow the hot water supply to reach its working temperature.

2. SLIDE the nameplate to the right, away from the digital temperature display,exposing the temperature adjusting screw. The SET temperature will now bedisplayed.

3. With a SMALL screwdriver gently rotate the screw in the direction indicated foreither a rise or drop in the blend temperature, until the required blend setting isdisplayed. One turn of the screw adjusts approximately 5oC.

4. Slide the nameplate fully back to the left. The ACTUAL blend temperature willnow be displayed. Allow a few seconds for the blend temperature to settle.

11

Circulating Flow Adjustment1. A circulating pump with adjustable performance is recommended, to enable the

flow and temperature drop to be set.

2. With cistern fed supplies, it is possible to draw air into the circuit, near to thepump, if the pump is set at too high a flow rate. A gravity checkvalve on theaffected outlet will remedy this, if the pump speed cannot be lowered.

3. A temperature drop of at least 2oC is required around the modulating circuit,and a reduction in the flow rate along the circuit by adjusting the pump controls(either electrical or mechanical), or a flow setting valve should achieve this,whilst still complying with the minimum flow rate of 10 l/min. This should bedone with no draw-off taking place, and the fitting of a direct reading flowmeasurement and setting valve is recommended. The two temperatures areread from the outlet thermometer and return thermometer.

4. Since the temperature loss around the circuit should have been calculated priorto installation, by setting the temperature drop around the circuit, the minimumflow should at least be reached.

5. When setting the circuit temperature drop, sufficient time should be allowed forthe circuit conditions to settle between adjustments. This time will depend uponthe circuit length, usually between approximately 5 and 30 minutes. Once theflow has been set, no further adjustments due to ambient temperature orseasonal changes, should be necessary.

12

Reversed Inlets (refer to Figures 5 & 6)

The standard valve is supplied with: HOT - RIGHT, COLD - LEFT inlets and topoutlet. When inlets are reversed, it should be noted that the "cold initiate"facility is less effective. Should it be necessary to correct the reverse inlets, thefollowing procedure must be followed:

1. Isolate the power.

2. Remove the red cover by undoing the 4 cover screws and gently lift the coveraway from the base. The wire sets connecting the base and cover are sufficientlylong to enable the cover to be turned sideways. (Do not strain wires).

3. Locate the wires from the circuit board to the drive unit motor (red and black),removing plug C by gripping the plug BODY and gently pulling away.

4. Rotate plug C and replace. The red plug wire should now be adjacent to thegreen LED.

5. Replace the cover, taking care not to trap the control wires.

Supply to DriveUnit Motor

Supply fromTransformer

Supply toTemperature

Probe

TemperatureProbe

AB C

View on Base (Top Outlet)Figure 5

13

Cover Joint632 75

C

Control PCBAssembly

886 98

PotentiometerAssembly

851 81

DisplayAdjustment

PotentiometerScrew615 51

Power-OnLED

Motor DirectionLEDS - red and

green

Fuse 500mAQuick-Blow

290 33Interface Socket(Refer to page 5)

Top and Bottom Outlets (refer to Figures 7 & 8)

The valve is supplied top outlet. The valve can be inverted and used as bottomoutlet, however, please note that:

1. The bleed hole (normally on the underside of the valve) which provides a visualwarning of internal leakage, may now be mostly obscured from view.

2. To maintain full cold initiate effectivity, the inlets should now be orientatedHOT - LEFT, COLD - RIGHT.

3. The temperature read-out will now be inverted. If it is necessary to correct this,the following procedure should be followed:

3.1. Isolate the power.3.2. Remove the red cover by undoing the 4 cover screws and gently lifting

the cover away from the base. The wire sets connecting the base andcover are sufficiently long to enable the cover to be turned sideways.(Do not strain wires).

3.3. Disconnect plugs A, B and C from the PCB.Note! Always grip plug body only.

View Inside CoverFigure 6

Plug A

Plug B

Plug D

Plug C

Plug E

14

3.4. Loosen 2.5 mm hexagon socket cap screw in crank arm assembly(869 27) (refer to Figure 10).

3.5. Remove mounting plate screws (615 72) and slide assembly away fromthe cap (196 75). A 5.5 mm A/F spanner may be required.

3.6. Remove drive unit (853 06) from mounting plate (231 03) and remountdrive unit on the opposite side of the mounting plate. Ensure that thewhite washers (551 30) are on the drive shaft. Remount the assemblyon the opposite flats on the cap (refer to Figure 7).

3.7. Operate the push rod gently by hand until the connecting rod upperassembly is near vertical, in both planes.

3.8. Align the hexagon socket cap screw on the drive shaft flat and tighten.3.9. Replace the three plugs A, B and C onto the circuit board. The printing

on the circuit board adjacent to the plugs will indicate the position, i.e.plug A to "13.5V", plug B to "PROBE" and plug C to "MOTOR" (refer toFigure 6). Ensure that plug C orientation is correct it should be:If HOT inlet is now on RIGHT, then RED plug wire adjacent to RED LED.If HOT inlet is now on LEFT, then RED plug wire adjacent to GREENLED.

3.10. Replace the cover, taking care not to trap the wire sets, and tighten the4 cover screws.

Drive Unit853 06

Mounting Plate231 03

Spacers551 30

Crank Arms869 27

Mounting Plate Screw615 72Cap

196 75Bleed Hole

Section through ValveFigure 7

15

Cover Screw618 31

CoverAssembly

001 98

Temperature Probe792 97

Washer641 32

Mounting Plate231 03

Cap Screw618 31

Drive Unit853 06

Internal Set926 63Pillar Cap

274 13

Pillar113 37

B C

A

Main AssembliesFigure 8

16

FAULT DIAGNOSISSymptom Origin Cause Rectification1. Blend temperaturerises when idling.

(a) Blendcircuit fault.

1. Flow rate lessthan 10 l/min.

Reset circuit flow rate.Check for air locks, blocked filters,closed valves, pump failure etc.

2. Circuit returntemperature lessthan 2oC below setblend.

Ensure minimum temperature droparound circuit of 2oC.

(b) Systemfault.

1. Checkvalveproblem.

Ensure correct placement of c/v's -refer to Figures 2 and 3.Ensure correct operation of c/v's.

2. Water pressure. Ensure hot and cold maintainedpressures are balanced.Ensure blend return from circuit tocalorifier is allowing flow.

3. Flow problem. Check for air locks, blocked filters,closed valves, etc.

(c) 32rmxfault.

1. Crank armassembly loose.

Check crank arm cap screw is tighton drive shaft flat, secure withthread-locking adhesive.Check crank arm assemblyadjustment.

2. Shuttle/connecting rodloose.

Tighten connecting rod locknut(625 20).Check connecting rod adjustment(refer to Figure 11).Check correct placement of shuttlebearing (568 34), seal (631 53) andwasher (638 65)

2. Blend temperaturefluctuates more than+ 5oC.

(a) Systemfault.

1. Maintainedsupply pressuresunequal.

Ensure supply pressures arebalanced.Check for blocked filters, valves notopen, air locks. etc.

2. Supplytemperatures.

Check for reasonable temperaturedifferential between set blend andhot or cold supply.

(b) 32rmxfault.

1. Shuttle sticking. Clean/descale shuttle, renewseparator seal and lubricate.

2. Debris onseat(s).

Clean/descale upper and/or lowerseat.

3. Crank arm/con.rod loose.

Refer to 1(c)

4. Motor worn. Renew drive unit (853 06).

17

Symptom Origin Cause Rectification3. Display "blinking"(if this occurs duringidling only, refer tosymptom (1))

(a) Systemfault.

1. Reversed inlets. Refer to page 12.

2. Hot watertemperature toolow.

Increase HWS temperature.

(b) 32rmxfault.

1. Shuttle sticking.

4. Display shows hotor cold temperatureonly.

(a) Systemfault.

1. Inlets reversed. Refer to page 12.

2. Supply problem. Refer to 1(b).

3. Maintainedsupply pressuresunequal.

Refer to 2(a).

4. Cold watertemperature toohigh.

Investigate cause.

Clean/descale shuttle, renewseparator seal and lubricate.

2. Debris onseat(s).

Clean/descale upper and/or lowerseat.

3. Crank arm/con.rod loose.

Refer to 1(c).

4. Temperatureprobe fault.

Check calibration or renewassembly (792 97).

5. Potentiometerfault.

Refer to Figure 10.

6. Motor worn/failed.

Renew drive unit (853 06).

5. Constantdifference betweenblend circuit anddisplayedtemperatures.

(a) Systemfault.

1. Outletthermometerinaccurate.

Renew.

1. Temperatureprobe out ofcalibration.

Re-calibrate.(b) 32rmxfault.

6. Unable to adjustcircuit temperature.

(a) Systemfault.

1. Blend circuitreturn incorrect.

Refer to 1(a).

2. Supply problem. Refer to 1(b), 2(a).

1. Internalcomponentrequires attention.

Refer to 3(b).(b) 32rmxfault.

18

Symptom Origin Cause Rectification

7. Displayanomalies.

(b) 32rmxfault.

1. Valveattempting todisplay in excessof 100oC.

Adjust blend setting.Check temperature probecalibration.Renew temperature probe.Renew control PCB assembly.

(a) 32rmxfault.

1. Valveattempting todisplay less than0oC.

Check connection of temperatureprobe to control PCB assembly.Re-calibrate temperature probe.Renew temperature probe.Renew control PCB assembly.

(a) 32rmxfault.

1. Fault in displayor control PCBassembly.

Check for moisture in cover, ifpresent refer to symptom 11.Renew control PCB assembly.

Note: This is a display error only.The 32rmx performance should notbe affected.

. .

8. No display, nocontrol.

(a) Systemfault.

1. No power to/fromtransformer.

Check power supply.Check transformer supply fuse.

1. Internal powerconnection loose/not made.

Check and remake connection.(b) 32rmxfault.

9. High-pitched noisefrom 32 rmx.

(a) Systemfault.

1. Inlet pressurestoo unequal.

Refer to 2 (a).

1. Motor gearingworn.

Renew drive unit (853 06)(b) 32rmxfault.

2. Internal fusefailure.

Renew fuse (290 33) andinvestigate cause.

3. (If POWER LEDon) Control PCBfailure.

Renew Control PCB assembly(886 98)

10. Water leakingfrom bleed hole.

1. Seal letting by. Check/renew lower cap seal(630 85), bellows housing seal(630 37).

(a) 32rmxfault.

E E

(a) Systemfault.

1. Temperature inexcess of 100oC.

Check boiler temperature and coldwater availability.

i.e. incompletedisplay

i.e. no display but32rmx operates

2. Bellows failure. Renew bellows assembly (794 54).

19

Symptom Origin Cause Rectification

11. Water/moisturevisible in cover.

(a) 32rmxfault.

1.Seal leaking. Refer to 10(a), plus upper cap seal(631 14), cap/con. rod seal (631 41),temperature probe seal (631 30).

3. Temperatureprobe leaking.

Renew temperature probe assembly(792 97), see also Installation.

4. Moisture/waterleft in unit duringprevious servicing.

Interior of cover must be kept dry, asmoisture will condense and causecorrosion of PCB.

5. Damaged sealseating.

Renew cap (196 75) or body.

12. Damagedtemperature probe.

(a) Installationfault.

1.Outlet pipeconnection not fullform.

Remake outlet connection, (seeInstallation).Renew temperature probe assembly(792 97).

2. Bellows failure. Renew bellows assembly (794 54).

20

MAINTENANCE

GeneralMaintenance must be carried out in accordance with these instructions, andmust be conducted by designated, qualified and competent personnel.

Warning: Isolate the electrical power supply and if necessary the water supplybefore you remove/install components.

Use only silicone based lubricants with this product.

Periodically:

Lubricate the crank arm ball swivel (refer to Figure 12).

Examine the bleed hole for signs of water, renew the bellows assembly or related'O' seals if necessary.

When ordering spare parts, please state product type, i.e. Rada 32rmx ElectronicTemperature Controller and identify part name and number. Refer to the SPAREPARTS section.

Removal/Installation ProceduresIn the procedures that follow the numbers used after the component names arethose used in the spare parts diagrams at the rear of this manual.

1. Cover Assembly (001 98)

Remove 4 screws (618 31) and gently lift off cover. Remove interconnectingwires by gripping each PLUG BODY and pulling gently. When replacing coverensure that the wires are not trapped.

2. Temperature Probe Assembly (792 97) (refer to Figure 9)

Remove cover assembly.

Disconnect Plug B, then using a 12 mm A/F spanner undo the probe nut andremove. A quantity of water will issue from the hole. This MUST be preventedfrom entering the electronics and motor.

Renew seal (631 30) or assembly complete (792 97), as appropriate.

Caution: Take care not to damage the tip of the probe.

Note: After installation, the new temperature probe may require some re-calibration to compensate for possible slight variations in probe characteristics.This is achieved by adjusting the "display adjust potentiometer" (refer to Figure6), anticlockwise to increase, clockwise to decrease display reading, until thedisplayed "actual" temperature corresponds with that on the outlet thermometer.

21

3. Potentiometer Assembly (851 81) (refer to Figure 10)

Remove cover assembly.

Gently disconnect Plug D (refer to Figure 6).

Unscrew the potentiometer carrier from the cover.

If realignment only is required, position the actuator in the carrier, slot-endoutwards, re-engage the potentiometer drive slot with the blade of the actuatorthen push the potentiometer fully back into its carrier. Secure with adhesive.

Otherwise, renew the potentiometer assembly complete (851 81). Screw theassembly fully back into the cover. Reconnect plug D.

Note! The plug can be inserted either way round.

Note! If an incorrectly sized screwdriver is used, or the actuator is pushed hard,you may push the potentiometer out of the carrier.

Seal631 30

B

Temperature Probe Assembly (792 97)Figure 9

Potentiometer

Actuator

Potentiometer Assembly (851 81)Figure 10

Carrier

22

4. Control PCB Assembly (886 98)

Remove cover assembly.

Gently disconnect plugs A, B, C and also plugs D and E (refer to Figure 6).

Remove 3 circuit board screws (615 51). Carefully withdraw PCB assembly.Renew if required, installation is a reversal of the removal procedure.

5. Drive Unit (853 06)

The drive unit is not serviceable, and therefore should a fault be identified, thenrenewal will be necessary.

Remove cover assembly.

Remove 2 drive unit screws (615 51). (A 5.5 mm A/F spanner may berequired).

Loosen cap screw on crank arm assembly (869 27) using 2.5 mm hexagonwrench.

Slide drive unit from assembly, taking care not to lose white spacers (551 30).

Position new drive unit against mounting plate, inserting drive shaft throughplate and crank arm assembly, and aligning drive shaft flat with cap screw.Tighten cap screw and secure in position with thread locking adhesive.

Rotate drive unit until fixings align with mounting plate holes, then secure withdrive unit screws (615 51).

6. Internal Set (926 63)

Remove cover assembly.

Undo the 4 retaining screws and carefully lever out the internal set. A quantityof water will issue from the recess. The sequence of dismantling the internalset for maintenance is as follows:

6.1. Shuttle (011 02)Place a 5.5 mm A/F spanner on the connecting rod nut, just below theuniversal joint. Using a 5.5 mm A/F tubular spanner (nut runner) removethe bottom locking nut inside the shuttle, using the upper spanner toprevent rotation of the connecting rod. Remove the washer, "O" sealand gently ease the shuttle out.

6.2. Upper Seat (547 76) and Liner (013 05), including Separator Seal(633 11)Remove the liner by unscrewing from the internal set, taking care notto damage the bellows assembly (794 54). The bellows must not bestressed in any way. Clean components and renew seals, givingparticularly careful attention to separator seal (633 11) within the liner,which must be lubricated with Rocol MX66 or equivalent.

23

6.3. Bellows Assembly (794 54) (Refer to Figure 11 )Caution: Once removed, the bellows cannot be reused.Using a thin rod through the small aperture at the connecting rod lowerend to prevent rotation, loosen fully the connecting rod nut.Use the appropriate clip pliers and remove circlip (573 31). Again usingthin rod through aperture, rotate the connecting rod to release thebellows assembly and connecting rod from the crank arm assembly(869 27). The crank arm assembly can now be removed if required.Remove and discard the bellows assembly.Lubricate the bellows housing seal (630 37), and ease the new bellowsassembly evenly into the cap recess.Caution: Do not compress the corrugated bellows, as this will severelyshorten its active service life.On reassembling the connecting rod to the crank arm assembly, set thedimension shown to 2.5 - 3.00 mm. Tighten the connecting rod nut, andfix position with thread locking adhesive.

Crank Arm Assembly869 27Connecting

Rod Nut

Glacier Bearing568 22

Cap

Bellows Assemblyincluding Connecting Rod

794 54

Aperture Circlip573 31

Bellows Housing Seal630 37

Cap/Connecting Rod Seal631 41

2.5 - 3 mm

Bellows AssemblyFigure 11

7. Crank Arm Assembly (869 27) (refer to Figure 12 )

7.1. AdjustmentThis assembly can be adjusted, if necessary, without removal. This isachieved by loosening the locknut and rotating the adjusting screw.The adjustment should allow the link to rotate around the crank arm, butSHOULD NOT allow any loose play between the crank arm and link.Once adjusted, secure the locknut tight against the link assembly andfix position with thread-locking adhesive.

24

7.2. RemovalLoosen the cap screw with 2.5 mm A/F hexagon wrench. Slide theassembly from the drive shaft, taking care not to lose the whitespacers (551 30). Slide the new assembly onto the drive shaft,aligning the shaft flat with the cap screw. Tighten the cap screw, fixingin position with thread-locking adhesive.

Crank Arm

Locknut

Cap Screw

Spacer

Ball Swivel

Link

Crank Arm AssemblyFigure 12

551 30

Adjusting Screw

8. Lower Seat (547 51)

Remove cover assembly and internal set.

Using a 5 mm A/F hexagon wrench, remove the stainless steel screw (651 71)from the body. Clean as necessary and replace.

25

SPARE PARTSSpare Parts List001 98 Cover Assembly011 02 Shuttle013 05 Liner113 37 Pillar (4)196 75 Cap231 03 Mounting Plate274 13 Pillar Collar (4)290 33 Fuse 500mA (Quick-blow)547 51 Lower Seat547 76 Upper Seat551 30 Spacers615 51 Drive Unit Screw (2) and Control PCB Assembly Screw (3)615 71 Lower Seat Screw615 72 Mounting Plate Screw (2)618 31 Cap Screw (4) and Cover Screw (4)625 20 Connecting Rod Nut626 20 Mounting Plate Nut (2) and Drive Unit Nut (2)632 75 Cover Joint638 65 Connecting Rod Washer641 32 Washer (4)642 25 Mounting Plate Washer (2) and Drive Unit Washer (2)792 97 Thermistor Probe Assembly794 54 Bellows Assembly851 81 Potentiometer Assembly853 06 Drive Unit869 27 Crank Arm Assembly886 98 Control PCB Assembly926 63 Internal Set (supplied as an assembly)932 06 Display Panel/Bezel Assembly935 36 Service Pack - components identified 'A'

26

Spare Parts Diagram

615 51

View Inside Cover

792 97

932 06

113 37

274 13

926 63618 31

001 98641 32 618 31

851 81632 75

886 98

290 33

A

792 97

27

Spare Parts Diagram

615

72(2

)

625

20A

011

02

A01

3 05

196

75

A

551

30

853

06

615

51(2

)

547

76

638

65

794

54

615

7154

7 51

618

31

642

25(4

)62

6 20

(4)

231

03

869

27

A

926

63In

tern

al S

et

A

A

A

A

A

AA

A

28

5 T R Remove text reference to: ”Remote audio/visual warning”.11 T R Remove heading ”Interface” and paragraph 1 & 2.27 I R Show fibre washer position behind upper seat (547.76) as indicated “A” .

Pag

e Summary of Revisions

Stat

usFo

rmat

Key T = Text I = IIlustrationA = Addition R = RevisionB = Back cover F = Front cover

April 2002 - Revision: P2622/2 to P2622/3

Revisions and Corrections

29

Notes

30

Notes

31

Notes

32

Kohler Mira LimitedCromwell Road,Cheltenham, England,GL52 5EP, UK.Tel.: + 44 (0)1242 221221 Fax.: + 44 (0)1242 221925

CUSTOMER CARE

P2622/3

BS EN ISO 9001 : 1994Reg. No. FM 14648

GuaranteeThis product is guaranteed against any defect of materials or workmanship for one year fromthe date of purchase, provided that the product has been installed correctly and used inaccordance with the instructions supplied.Any part found to be defective during the guarantee period will be replaced or repaired - atour option - without charge, provided that the product has been properly used and maintained.Routine cleaning and maintenance should be carried out in accordance with the instructionssupplied.The product should not be modified or repaired except by a person authorised by Rada.Your statutory rights are in no way affected by this guarantee.

After Sales Service - how we can help youWe have a network of fully trained staff ready to provide assistance, should you experienceany difficulty operating your Rada equipment.

Spare PartsAll functional parts of Rada products are kept for up to ten years from the date of finalmanufacture.If during that period, our stock of a particular part is exhausted we will, as an alternative,provide an equivalent new product or part at a price equating to the cost of repair to the old,bearing in mind the age of the product.

Customer Care PolicyIf within a short time of installation the product does not function correctly, first check with theoperation and maintenance advice provided in this Manual to see if the difficulty can beovercome.Failing this, contact your installer to ensure that the product has been installed andcommissioned in full accord with our detailed installation instructions.If this does not resolve the difficulty, please ring your nearest Rada contact who will giveevery assistance and, if appropriate, arrange for the local Service Engineer or Agent to callon a mutually agreeable date.

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Rada is a registered trade mark of Kohler Mira Limited.The company reserves the right to alter product specificationswithout notice.

© Kohler Mira Limited, November 2001