This quick reference guide is a summary of the complete installation procedure. It serves as a reminder once the generalinstallation instructions have been readand understood.

The general installation instructions mustbe followed in full to ensure correctoperation of the valves.

1. Check correct valve has been chosenagainst system conditions.

2. Flush installation thoroughly BEFOREfitting chosen Proflow Suremix valve.

3. Install valve using the fittings providedincluding check valves and strainers.

4. Set to the required temperature.

5. Operate valve until completely satisfiedit is functioning correctly.

6. Perform fail-safe shut-off test.

7. Record set temperature and test resultsfor future reference.

8. Install partner clip for additional anti-tamper protection.

Quick installation guide

This section refers to the Proflow SuremixHCX - a Type 3 Thermostatic Mixing Valvewhich conforms to NHS Estates ModelEngineering Specification D08, and isapproved under the TMV 3 Scheme.

Type 3 Thermostatic Mixing Valves aresuitable for use when the hot and coldwater supplies to the valves are normallywithin the limits specified in the tablebelow (conditions for normal use) for eachoperating range, and where the mixed watertemperature is set on commissioning of thevalves for each purpose. Only thermostaticmixing valves with no user-accessibleadjustment of the mixed water temperatureshould be used where more than one outletmay discharge simultaneously whenoperated by more than one user at thesame time.

Type 3 Thermostatic Mixing Valves withuser-accessible adjustment may not be usedfor supply to different maximum mixedwater temperatures, e.g. Showers / bathmixers, unless the movement of the divertermechanism or some other device willautomatically adjust the temperatures tothe maximum mixed water temperatureallowed for that mixed water outlet.

Flow characteristics

Dimensions for Proflow Suremix HCX

NoteValves operated outside these conditionscannot be guaranteed to operate as Type 3valves.

UKWFBS acceptance number 002078

Specification data

Installation instructions for Proflow Suremix HCXBefore installing Proflow Suremix HCXvalves, it is essential that users check thatthe designation of the valve matches theapplication flow rate, temperature anddynamic pressures to all the terminalfittings to be served. Isolating valves mustbe fitted in an accessible position prior tothe Proflow Suremix HCX in order tofacilitate servicing.

For optimum performance it isrecommended that the supply pressures areas close to equal as possible and wherenecessary a pressure reducing valve, such asthe E2000, should be installed in theappropriate higher pressure supply. Checkthat supply temperatures are within thepermitted range for each valve chosen andcomply with guidance information on theprevention of Legionella.

Take care when connecting the supply pipes.Hot and Cold water supplies must beconnected to the appropriate ports asindicated using the supplied union adaptors,complete with check valves and inlet strainers.Mixed supply is provided through the MIX port.

Prior to the installation of the ProflowSuremix HCX, remove the strainers andcheck valves provided within the inletfittings and ensure pipework supplyingvalves is thoroughly flushed free of dirt anddebris. Refit strainers and check valvesincluding the ‘O’ rings when flushing iscomplete and system is clean.Commissioning of the valve may only takeplace after the system has been thoroughlycleaned. Continued over leaf

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The following information is provided toensure that users gain the maximumbenefit from their chosen Proflow SuremixThermostatic Mixing Valve. Please readthese installation and operatinginstructions carefully before proceeding onto the detailed commissioning instructionsfound in individual product sections.

Section AThis section refers to the Proflow SuremixHCX - a Type 3 thermostatic mixing valvewhich conforms to the NHS ModelEngineering Specification D08 and isapproved under TMV 3 Scheme.

Section BThis section refers to the Suremix UB andSuremix C – Type 2 thermostatic mixingvalves which have been manufactured inaccordance with the requirements of BSEN 1111 and BS EN 1287.

For informationThe Health Guidance Note (HGN) dealingwith safe hot water temperatures makesreference to three types of valve, asfollows:

Type 1A mechanical mixing valve with maximumtemperature stop (including single levertaps).

Type 2A thermostatic mixing valve conformingto BS EN 1111 amd BS EN 1287 (formerlyBS 1415 Part 2).

Type 3A thermostatic mixing valve withenhanced thermal performance complyingwith NHS Estates requirements.

The TMV scheme Certification relates toType 2 and 3 valves.

Introduction

10

20

30

40

50

60

70

80

90

100

0.150.0 0.20 0.25 0.30 0.35 0.40 0.45

Flow rate (litres/second)

LOW

PR

ESSU

RE

Pres

sure

dro

p (k

Pa)

4.00.0 5.0 6.0 7.0 8.0 9.0 10.0100

150

200

250

300

350

400

450

500

550

600

HIG

H P

RES

SUR

E

Flow rate (litres/second)

Pres

sure

dro

p (k

Pa)

Section A – Proflow Suremix HCX

J

F

Conditions for normal use

15mm 22mmABCDEFGHJ

Overall heightCentre line to top cover

Centre line to bottom faceFace to face

Centre line between QTBVOverall width

DepthFlat face unionCompression nut

155mm50mm50mm78mm157mm220mm40mm1"BSP15mm

155mm50mm50mm78mm157mm220mm40mm1"BSP22mm

Operating pressure rangeHigh

pressureLow

pressure

Maximum static pressure - barFlow pressure, hot and cold - barHot supply temperature - °CCold supply temperature - °C

101 to 5

52 to 655 to 20

100.2 to 152 to 655 to 20

Factory temperature setting (nominal)Temperature setting rangeMaximum pressure loss ratioFlow rate, minimum (15 and 22mm)Flow rate at 1 bar pressure loss (15mm)Flow rate at 1 bar pressure loss (22mm)Shut-off on cold supply failure(60°C hot 38°C mix. 0.5 bar equal pressures)

38°C35°C – 48°C10:10.07 litres/sec 0.48 litres/sec0.5 litres/sec1.0 – 1.5 sec

Approved applicationsLP-W, HP-W - Wash basin, low and high pressure -maximum set temperature 41°CLP-S, HP-S - Shower, low and high pressure -maximum set temperature 41°CHP-T44 Bath fill to 44°C, high pressure - maximum set temperature 44°CHP-T46 Bath fill to 46°C, high pressure – maximum set temperature 46°CLP-B, HP-B - Bidet, low and high pressure –maximum set temperature 38°CApproval Number (15mm and 22mm HCX valves) –ETC/177/0602

F

15mm 22mmABCDEFGH

Overall heightCentre line to top cover

Centre line to bottom faceFace to faceOverall width

DepthFlat face unionCompression nut

155mm50mm50mm78mm160mm40mm1"BSP15mm

155mm50mm50mm78mm160mm40mm1"BSP22mm

Dimensions for Proflow Suremix HCXwith right angled QTBV

Proflow Suremix mark I type strainer

Proflow Suremix mark II type strainer

Installation and maintenance instructionsfor thermostatic mixing valves

Flow characteristics

Dimensions for Proflow Suremix C

UKWFBS listing number 9704080

Setting and commissioninginstructions – Proflow Suremix C

The Proflow Suremix C is supplied factory setat 43°C. If the initial valve outlettemperature is substantially different to thischeck supply pressures and temperatures toensure they are not outside the valvesspecification, then proceed as follows:

1. Remove the securing screw the whitehead and the locking ring.

2. Refit the head to the spindle. With both hot and cold supplies turned full on, and the terminal fitting fully open,adjust the outlet temperature to therequired setting by turning the headclockwise to decrease and anti-clockwiseto increase the temperature. Werecommend a hand held digitalthermometer be used to correctly measure the outlet temperature.

3. Once satisfied that the correcttemperature has been achieved, the valvemechanism should be exercised aminimum of three times by alternatelyisolating the hot and cold supplies. Re-check the set temperature of thevalve. If the set temperature has driftedthen the setting and exercising procedureshould be repeated.

Once the valve has been exercised and thetemperature is stable, a fail-safe shut offperformance check should be undertaken asfollows:

Continued. Alternatively installers may fitthe Proflow Suremix HCX dummy valvewhich simplifies flushing of the pipeworkbefore installation of the Proflow SuremixHCX, the inlet strainers and check valves.

The integral strainers provided are designedto protect the check valve and thus preventcross flow. Additional Y pattern strainersshould be fitted where high levels of waterparticles or other contamination exists. Thiswill help to ensure satisfactory performanceand, when used with the strainers provided,serve to protect the valve.

Proflow Suremix HCX valves containtemperature sensitive parts. Duringinstallation ensure that valves are notexposed to extreme hot or coldtemperatures - where BS EN 1254 capillaryfittings are used remove the valve frompipework prior to applying heat.

The Proflow Suremix HCX thermostaticmixing valve is fully serviceable in line andshould be checked periodically. Isolatingvalves must be fitted in an accessibleposition prior to the Proflow Suremix HCX inorder to facilitate servicing - installersshould bear this in mind when choosing thelocation for valves.

Proflow Suremix HCX valves are suppliedwith WRAS listed check valve cartridges, forboth hot and cold supplies to the valve.These are sufficient to meet back flowprevention requirements providing theterminal fittings comply with WaterByelaws. If Proflow Suremix HCX valves aresupplying submerged outlets additionalprotection may be required - please consultyour local Water Byelaws office forclarification.

Setting and commissioninginstructionsThe Proflow Suremix HCX is supplied factoryset at 38ºC. Please ensure thatcommissioning of the valve is undertakenunder normal operating conditions. If theinitial valve outlet temperature issubstantially different to this, check supplypressure and temperatures to ensure theyare not outside the valves' specified limits.Then proceed as follows:

1. Remove the securing white cap.

2. With both hot and cold supplies turnedfull on, and the terminal fitting fullyopen, adjust the temperature to therequired setting with the adjustment keyprovided for this purpose - clockwise todecrease and anti-clockwise to increase.We recommend a hand held digitalthermometer be used to correctlymeasure the outlet temperature.

3. Once satisfied that the correcttemperature has been achieved, thevalve mechanism should be exercised aminimum of three times by alternatelyisolating the hot and cold supplies. Re-check the set temperature of thevalve. If the set temperature has driftedthen the setting and the exercisingprocedure should be repeated.

Once the valve has been exercised and thetemperature is stable, a fail-safe shut-offperformance check should be undertaken asfollows:

1. Isolate the cold water supply - the flowfrom the terminal fitting should fall tono more than a trickle within a fewseconds depending on site conditions.Restore the cold supply and let thetemperature stabilise.

2. Carry out a similar test for the hotsupply.

If either fail-safe function does not operatesatisfactorily ensure supply pressure andtemperatures under normal flow conditionsare within the valve’s operating parameters.In addition check that the hot supplytemperature is more than 10ºC above thevalve set temperature (i.e. hot to mixtemperature differential > 10ºC). If the hotsupply is less than 10ºC above the valve settemperature the boiler thermostat settingmay have to be increased. Also check thatthere is not a long dead leg on the hotsupply to the valve, and that no cross flowis taking place effectively reducing thesupply temperature.

For optimum performance it isrecommended that the dynamic supplypressures be as close to equal as possible.Should the dynamic supply pressures beoutside a 10:1 imbalance ratio, pressurereducing valves should be installed in theappropriate higher-pressure supply, or thelower pressure supply should be boosted.

When the Proflow Suremix HCX has been setand tested refit the white cap and finallysnap on the partner clip.

A record of the results should be kept forfuture maintenance checks.

1. Record temperatures of hot and coldsupplies.

2. Record temperature of mixed water atthe largest draw-off rate.

3. Record temperature of mixed water atthe smaller draw-off rate (record thisflow rate).

4. Isolate the cold supply to the ProflowSuremix HCX and monitor the mixedwater temperature. This should notexceed the set temperature by more than2°C.

5. Re-establish the cold supply and ensure that the set temperature is re-established.

6. Finally, detail the test equipment used.

Working temperatures

Factory temperature settingTemperature setting rangeTemperature of hot supplyTemperature of cold supplyMinimum temperature differential,

hot to mixTemperature stability

(under normal supply variations)

43°C35 – 60°C60°C – 85°C5°C – 25°C

15°C

± 2°C

Working pressures

Working pressure, staticWorking pressure, dynamicMaximum pressure loss ratio

(either supply)Note: optimum performance is achieved withequal pressures

10 bar max6 bar max0.2 bar min10:1

HOT COLD

MIX

15mm 22mmABCDE

Overall heightCentre line to bottom faceCentre line to top cover

Face to faceOverall width

150mm52mm58mm77mm160mm

150mm52mm58mm77mm170mm

Proflow SThis section refers to the Proflow SuremixUB and C – thermostatic mixing valves whichhave been manufactured in accordance withBS EN 1111 and BS EN 1287.

Installation instructions for Proflow Suremix UB and ProflowSuremix C

Before installing Proflow Suremix UB andProflow Suremix C valves, it is essential thatusers check that the designation of the valvematches the application, flow rates,temperatures and dynamic pressures to allthe terminal fittings to be served. It isrecommended that isolating valves are fittedin an accessible position prior to ProflowSuremix UB and Proflow Suremix C valves inorder to facilitate servicing.

For optimum performance it is recommendedthat the supply pressures are as close toequal as possible and where necessarypressure reducing valves should be installedin the appropriate higher pressure supply.Check that supply temperatures are withinthe permitted range for each valve chosenand comply with guidance information onthe prevention of Legionella.

Take care when connecting the supply pipes.Hot and Cold water supplies must beconnected to the appropriate ports asindicated using the supplied union adaptors,complete with check valves and inletstrainers. Mixed supply is provided throughthe MIX port.

Prior to installation of Proflow Suremix UBand Proflow Suremix C valves removestrainers and check valves provided withinthe inlet fittings and ensure pipe worksupplying valves is thoroughly flushed freeof dirt and debris. Refit strainers and checkvalves, including the '0' rings when flushingis complete and the system is clean.Commissioning of the valve may only takeplace after the system has been thoroughlycleaned. Alternatively installers may fit theProflow Suremix C dummy valve whichsimplifies flushing of the pipework beforeinstallation of the Proflow Suremix C, theinlet strainers and check valves.

The integral strainers provided are designedto protect Proflow Suremix UB and ProflowSuremix C valves. Additional Y patternstrainers should be fitted where high levelsof water particles or other contaminationexists. This will help to ensure satisfactoryperformance and, when used with thestrainers provided, serve to protect thevalve.

Proflow Suremix UB and Proflow Suremix Cvalves contain temperature sensitive parts.During installation ensure that valves arenot exposed to extreme hot or coldtemperatures – where BS EN 1254 capillaryfittings are used remove the valve frompipework prior to applying heat.

Proflow Suremix UB and Proflow Suremix Cthermostatic mixing valves are fullyserviceable in line and should be checkedperiodically (dependent on the product).Isolating valves must be fitted in anaccessible position prior to the ProflowSuremix UB and Proflow Suremix C in order tofacilitate servicing – installers should bearthis in mind when choosing the location forvalves.

Section A – Proflow Suremix HCX

1.

2.

1. Isolate the Cold water supply - the flowfrom the terminal fitting should be nomore than a trickle within a fewseconds. NB hot supply temperaturemust be at least 60°C. Restore the coldsupply and let the temperature stabilise.

2. Carry out a similar test for the hotsupply.

If either fail-safe function does notoperate satisfactorily ensure supplypressure and temperatures under normalflow conditions are within the valvesoperating parameters. For optimumperformance it is recommended that thesupply pressures be as close to equal aspossible. Where necessary, pressurereducing valves should be installed in theappropriate higher pressure supply.

When the Proflow Suremix C has been setand tested, remove the white head andrefit the white locking ring. Replace thehead making sure to locate the tab on thelocking ring in the slot on the inner faceof the white head. NB It may be necessaryto reposition the white locking ring toallow fitting of the white head. Secure thehead in place with the allen screw andfinally snap on partner clip.

Flow characteristics

Dimensions for Proflow Suremix UB

UKWFBS listing number 9704080

Additional installation instructions

In addition to the general installationinstructions already provided opposite, thefollowing additional instructions must befollowed when installing Proflow SuremixUB.

1. Flow regulator (adaptor identified withblue cap) MUST be fitted to the coldinlet on ALL installations where coldsupply pressure is greater than hotsupply pressure. Flow regulator may alsobe left in place for installations withhigher hot water pressures.

2. The union adaptor which only containsthe check valve must be fitted to the hotsupply inlet.

3. The remaining union adaptor is fitted tothe mix supply.

Setting and commissioninginstructions – Proflow Suremix UB

The Proflow Suremix UB is supplied factoryset at 43°C. If the initial valve outlettemperature is substantially different to thischeck supply pressures and temperatures toensure they are not outside the valvesspecification, then proceed as follows:

1. Remove the securing screw and the whitehead.

2. Refit head to spindle at approximately180° from original position. With bothhot and cold supplies turned full on andthe terminal fitting fully open, adjust thetemperature to the required setting byturning the spindle clockwise to decreaseand anti-clockwise to increase. Werecommend a hand held digitalthermometer be used to correctlymeasure the outlet temperature.

3. Once satisfied that the correcttemperature has been achieved, the valvemechanism should be exercised aminimum of three times, by alternatelyisolating the hot and cold supplies. Re-check the set temperature of the valve.If set temperature has drifted then thesetting and exercising procedure shouldbe repeated.

Once the valve has been exercised and thetemperature is stable, a fail-safe shut offperformance check should be undertaken asfollows:

1. Isolate the Cold water supply – the flowfrom the terminal fitting should be nomore than a trickle within a few seconds.NB Hot supply temperature must be atleast 60°C. Restore the cold supply andlet the temperature stabilise.

2. Carry out a similar test for the hotsupply.

If either fail-safe function does not operatesatisfactorily ensure supply pressure andtemperatures under normal flow conditionsare within the valves operating parameters.For optimum performance it isrecommended that the supply pressures beas near to equal as possible. Wherenecessary pressure reducing valves shouldbe installed in the appropriate higherpressure supply.

When the Proflow Suremix UB has been setand tested, refit the white head makingsure the locking slot on the headinterconnects with the body tab. Securehead in place with the allen screw and snapon partner clip.

Working temperatures

Factory temperature settingTemperature setting rangeTemperature of hot supplyTemperature of cold supplyMinimum temperature differential,

hot to mixTemperature stability

(under normal supply variations)

43°C35 – 55°C60°C – 85°C5°C – 25°C

15°C

± 2°C

Working pressures

Working pressure, staticWorking pressure, dynamicMaximum pressure loss ratio

(either supply)Note: optimum performance is achieved withequal pressures

10 bar max4 bar max0.2 bar min5:1

HOT MIX

COLD

15mmABCDE

Overall heightCentre line to bottom faceCentre line to top cover

Face to faceOverall width

148mm35mm60mm77mm150mm

Suremix C Proflow Suremix UB

Section B – Proflow Suremix C and Proflow Suremix UB

Should the supply pressure be outsideimbalance ratio permitted (see specificproduct for details) an E2000 pressurereducing valve should be installed in theappropriate higher-pressure supply.

Cross flowCross flow can be simply identified byrunning water from the terminal fitting untilthe hot inlet is hot and the cold inlet cold.Turn the tap off and monitor the inlet pipetemperatures. If cross-flow is taking placethere will be rapid change in temperature onone of the inlet pipes. If it is thought thatcross-flow is occurring check valves shouldbe removed, cleaned and then replaced. Takecare when testing the hot supply and ensurea suitable vessel is available to collect anywater.

Connecting the supply pipesHot and Cold water supplies must beconnected to the appropriate ports as

indicated using the supplied union adaptors.Complete with check valves and inletstrainers. Mixed supply is provided throughthe MIX port. Where water through themixed port is either fully Hot or fully Cold, orvalves appear unable to adjust, re-checkinstallation.

All Proflow Suremix valves are supplied withWRAS listed check valve cartridges for bothhot and cold supplies to the valve. These aresufficient to meet back flow preventionrequirements providing terminal fittingscomply with Water Byelwas. If ProflowSuremix valves are supplying submergedoutlets additional protection maybe required– please consult your local Water Byelawsoffice for clarification.

AccessoriesA comprehensive selection of spares andaccessories is available to ensure users gainthe maximum benefit from their chosen

Proflow Suremix valve. Please contact yourlocal Yorkshire Fittings sales office orplumbers’ merchant for details.

Proflow Suremix dummy valvesProflow Suremix dummy valves should beinstalled prior to commissioning of thesystem to facilitate flushing out. The use ofProflow Suremix dummy valve reduces thelikelihood of operational problems caused byforeign matter which, if present within thesystem, may impair performance or damagethe valves.

Service kitsAll Proflow Suremix valves are fullyserviceable – a complete list of spare andreplacement parts is available from YorkshireFittings.

Fault findingIf after installation you find the valve doesnot work, please check the following points:

1. Has the water been turned on?

2. Are the recommended pressures correctand set?

3. Have full bore control valves beeninstalled, and not service valves withrestricted bore?

4. Is the hot water set at the righttemperature?

5. Are hot and cold pipes connected to theright ports?

6. Have the check valves been installed inthe correct way and in the correctposition?

7. Are the filters in the correct location andin the correct orientation?

8. Are the filters clean?

9. Has the system been flushed using thedummy valve prior to installing theProflow Suremix valve?

The Proflow Suremix HCX should bechecked periodically against the originalinstallation performance results. Carry outthe performance tests 6-8 weeks after theinitial installation and then again after 12-15 weeks. If there are no changes a 6 monthly test plan can be implemented. If significant changes are noticed then theservice period should be reduced.

The local quality of the water will alsoinfluence the maintenance frequency. Forinstallation in hard water areas usersshould consider installing a water softener.

Performance tests1. Check the set temperature of the valve,

we recommend a hand held digitalthermometer be used to correctlymeasure the outlet temperature.

2. Perform the shut-off fail-fail safe test(exercise the valve a minimum of threetimes prior to undertaking the shut-offtest).

3. If there is no change in either the settemperature or the shut-off time thevalve is functioning correctly andrequires no further maintenance at thistime.

However, if the set temperature hasaltered by more than 2°C service work isrequired. Check to see if any externalfactors have altered.

Temperature1. The Proflow Suremix HCX will perform

sluggishly if the set temperature isnear to the supply temperature.

2. Hot water supply temperature must beat least 10ºC higher than the settemperature.

3. Check both the hot supply temperatureand the valves set temperature andadjust accordingly.

Pressure1. Lower flow rates may indicate a

reduced supply pressure. Check thesupply pressure.

2. Lower flow rates may also be a result ofblocked inlet strainers. Inlet strainers

should be checked and cleaned asrequired.

3. Any upstream line strainers should beinspected and cleaned as necessary aspartially blocked strainers will reduceflow and impair performance.

If having carried out the above proceduresperformance is still unsatisfactory it ispossible that a build up of lime scale ispresent within the valve or it is possiblethat there has been a deterioration of theseals.

To clean the valve:1. Isolate the hot and cold supply and

remove the valve body. (Beforeproceeding further, make note of theorientation of all parts so that theymay be re-assembled in the correctmanner).

2. Remove headwork and retain for re-assembly, then by carefullyunscrewing the large nut slide out thethermostat carrier and workingcomponents.

3. Clean with a weak solution of a non-toxic WRAS approved scaleremover.

4. Fit a new seal service kit. The internal ‘O’ rings should be greased; using aWRAS approved silicone based grease,and placed to ensure smooth movementof the piston within its housing. Whenre-assembling care must be taken notto damage the ‘O’ rings, observe the‘O’ ring on insertion via the cold inletport. Do not force the valve.

After cleaning, re-assemble the ProflowSuremix HCX. Exercise, reset and test thevalve in accordance with the instructionslaid out in the Setting and Commissioningsection. A record of the results should bekept for future maintenance checks.

If after cleaning and replacing ‘O’ ringseals the valve is still not functioningcorrectly it may be necessary to replacethe thermal element or other components.Please contact Yorkshire Fittings fordetails and advice.

General trouble shooting

Maintenance instructions

For more information please contact your regional sales office:

Proflow Suremix HCXThe Proflow Suremix UB and ProflowSuremix C valves do not require routinemaintenance but it is recommended thatthe performance is checked at leastannually against the original installationperformance results. If there have beensignificant changes then the service periodshould be reduced, if the results arenominally the same the annual test plancan remain in place.

The quality of the water will also influencethe maintenance frequency. Forinstallations in hard water areas, usersshould consider installing a water softener.

If in doubt carry out the followingperformance tests after initial installationand then again after a further 12 – 15weeks.

Performance tests1. Check the set temperature of the valve,

we recommend a hand held digitalthermometer be used to correctlymeasure the outlet temperature.

2. Perform the shut off fail-safe test(exercise the valve a minimum of threetimes prior to undertaking the shut offtests).

3. If there is no change in either the settemperature or the shut off time thevalve is functioning correctly andrequires no further maintenance at thistime.

However, if the set temperature has alteredby more than 2°C service work is required.First check to see if any external factorshave altered.

Temperature1. The Proflow Suremix C will perform

sluggishly if the set temperature is nearto the supply temperature. Hot watermust be at least 15°C greater than theset temperature e.g. valve set at 45°Cthen hot water supply temperature mustbe minimum 60°C.

2. Check both the hot supply temperatureand the valves set temperature andadjust accordingly.

Pressure1. Check the supply pressure. The lower the

supply pressure the lower the flow. Inletstrainers should be removed andcleaned. Partially blocked strainers willreduce flow and impair performance.

2. Any upstream line strainers should beinspected and cleaned as necessary,partially blocked strainers will reduceflow and impair performance.

If, having carried out the above proceduresperformance is still unsatisfactory it ispossible that a build up of lime scale ispresent within the valve or that there hasbeen a deterioration of the seals. Cleaninginstructions can be found in the ProflowSuremix HCX section.

Proflow Suremix UB and C

Technical Help: Free Phone 0800 156 0050 Technical Help: Free Fax 0808 156 1012www.pegleryorkshire.co.uk