Nu-Heat UNDERFLOOR & RENEWABLES

Transcription

1 Nu-Heat UNDERFLOOR & RENEWABLES warm water underfloor heating with a heat pump electrical manual design innovation expertise service v2a-may v1-mar Nu-Heat

2 Title Section Contents Introduction Systems with NIBE weathercompensating heat pump First Fix: Second Fix: Systems with user supplied heat pump, either weather compensating, requiring a call-for-heat, or with a buffer tank First Fix: Second Fix: Optional secondary hot water loop kit 1.1 Introduction to all systems Electrical components 2.2 Underfloor heating schematic 2.3 Optiflo wiring centre connections hardwired thermostats 2.4 Optiflo wiring centre connections wireless thermostats 2.5 Thermostat connections Electrical components 3.2 Underfloor heating schematic 3.3 Optiflo wiring centre connections call-for-heat or buffer tank Master 3.4 Optiflo wiring centre connections call-for-heat or buffer tank Slave 3.5 Optiflo wiring centre connections weather compensating Master 3.6 Optiflo wiring centre connections weather compensating Slave 3.7 Thermostat connections Aquastar Index Appendices A B Setting up electrical equipment for commissioning Electrical control checklist If you are using a Nu-Heat NIBE heat pump, please refer to the separate manuals for full installation and commissioning details.

3 1.1 Introduction electrical manual systems with a heat pump for nu-heat warm water underfloor heating with fastflo tubing and optiflo control 1.1 Introduction all systems The following pages contain diagrams to compliment the A3 Docking Drawings at the beginning of this folder. These comprise of the first and second fix information for the underfloor heating electrical components. Parts shown in colour are generally supplied by Nu-Heat and those shown in outline are predominantly supplied by others. For detailed wiring requirements for the heat pump and cylinder, refer to manufacturers installation manual. Attention to the advice given in this manual will help to ensure a trouble-free and effective installation. The requirements of the relevant British Standards and IEE Wiring Regulations should always be met. BS7671: 2001 (2004). Requirements for Electrical Installations, IEE Wiring Regulations, Building Regulations Electrical Safety (Part P) Installation must be carried out by a Competent Person or, failing that, the local building control authority must be notified of the proposed work before commencement and the completed installation must be inspected by a Competent Person. Safety Nu-Heat recommends the use of a single isolation switch to supply the electrical items that make up the heating system, with a separate supply to the heat pump. Where live conductors are sleeved in a colour other than brown, coloured marker sleeves should be fitted at the ends of the wires to identify them. Location of equipment Nu-Heat electrical wiring centres are designed to be fixed to walls inside the building and should be protected from damage during the installation process. Optional additional equipment Where connections are shown to equipment that is not supplied by Nu-Heat, this is for guidance only. In all such cases the supplier s installation information should be checked before fixing and connecting the equipment. First Fix Please note that the first fix diagrams in this manual must be read in conjunction with the specific electrical A3 Docking Drawing (for NIBE heat pumps) or the heat pump suppliers information. There are separate schemes depending upon whether the heat pump is supplied by Nu-Heat or if it is user supplied, in order to account for the different equipment to cope with the various operational modes of other heat pump suppliers. Select the First-fix cabling plan that matches your requirement. Note that additional cables may be required for equipment that is not illustrated. Refer to supplier s installation information. Second Fix Wiring schemes are provided appropriate for all types of installation. Select the ones that match your requirement. For connections to equipment that is not illustrated, refer to supplier s installation information. If there is any aspect of the installation that you do not understand, please contact Nu-Heat Technical, quoting your QR (system reference) number for advice. In line with the company policy of product development, Nu-Heat reserves the right to supply different components to those shown. This manual is the copyright of Nu-Heat. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise without prior written permission of Nu-Heat.

4 2.1 System components NIBE heat pumps Electrical, underfloor heating NIBE heat pumps regulate their heating to match the weather conditions and the temperature within the property. Correctly matched to the property, the heat pump will maintain the property at a comfortable steady temperature. The heating system is chiefly controlled from the heat pump, with some local control in zones equipped with thermostats (generally bedrooms). It is not necessary to fit programmable thermostats or timeclocks to this form of heating system. Room thermostats Systems with a heat pump normally require a proportion of zones to be connected open flow, with no room thermostat or valve actuator. Thermostats are normally used for bedrooms and some other areas that require a top limit to be placed on their temperature. Nu-Heat offers a range of thermostats. Please note that cabling requirements can differ. Each room thermostat is connected through the appropriate Optiflo wiring unit to its corresponding actuator on the Optiflo manifold. This means that each thermostat is individually capable of switching off the heating in that room alone. Thermostats should normally be fitted at light switch height, out of direct sunlight or draughts and not above local heat sources such as towel rails. 2.1 Electrical components Standard dial thermostat, bathroom thermostat and sensor The installation of thermostats in bathrooms is governed by IEE regulations. If bathrooms are to operate as separate zones the thermostat must be fitted outside the bathroom with a remote sensor mounted inside the bathroom. The remote sensor is fitted with approximately 3m of flexible cable. Standard Standard bathroom sensor Deluxe dial thermostat, bathroom thermostat and sensor The installation of thermostats in bathrooms is governed by IEE regulations. If bathrooms are to operate as separate zones the thermostat must be fitted outside the bathroom with a remote sensor mounted inside the bathroom. The remote sensor is fitted with approximately 3m of flexible cable. Deluxe Deluxe bathroom sensor Wireless dial thermostat Similar in appearance to the standard dial thermostat but with a digital temperature readout, the wireless dial thermostat offers a solution in properties where it is not possible to install cables to all thermostat positions. The mains powered receiver unit(s) should be sited in an area of good reception and connected to the appropriate Optiflo wiring unit(s). Wireless dial receiver Optiflo wiring unit OMWU1-C The Optiflo wiring unit connects the room thermostats to their corresponding actuator on the manifold, allowing them to individually activate the heating system as required. This wiring centre should be mounted near the Optiflo manifold. Note: An Optiflo manifold that supplies only open-flow zones does not require an Optiflo wiring unit. Wiring and programming instructions In all cases, detailed wiring information is contained in this manual. For operating instructions, please see the Nu-Heat User Guide. For details of additional electrical equipment associated with the heat pump, please refer to the A3 electrical Docking Drawing.

5 KEY Mains cable, 1mm 2 conductors 5-core + earth 4-core + earth 3-core + earth 2-core + earth 2-core flex For first fix information local to the heat pump please refer to your A3 Docking Drawing and Heat Pump Manual 2.2 Underfloor heating schematic 1st fix Extend to further Optiflo wiring centres if required Heating system isolation switch Dial unit outside Sensor in wet area wet area Bathroom thermostat OMWU1-C Optiflo wiring unit Wireless base receiver (wireless option) Room thermostat (wireless option) Room thermostat (hard wired) Circuit at full temperature Optiflo manifold OMWU1-C Optiflo wiring unit (Not required for fully open flow areas) Optiflo manifold Open flow zones do not require thermostats or actuators Room thermostats (hard wired) Optional low temperature control kit (refer to docking drawing) System with a NIBE heat pump First-fix cabling requirement This schematic diagram shows how various components fit into the system. Items shown in outline only are generally supplied by the customer. Layouts are diagrammatic only and should be read in conjunction with the wiring diagrams. The illustration is not drawn to scale. The appearance of components may vary from those illustrated. Note: Most zones will not require thermostats. Thermostats are generally fitted to limit the temperature in bedrooms. If all zones on one manifold are open flow, then the Optiflo wiring unit is not required. See the A3 Manifold and Zone Information for details of thermostats and wiring boards.

6 KEY Note: colour of wires may vary from those shown. Earth where required. SL L N E Switched Live Live Neutral Earth Live voltage marker sleeve 2.3 Second fix: hard wired thermostats Systems with NIBE weather compensating heat pumps Connections to Optiflo wiring unit 2.3 Optiflo wiring 2nd fix To heating system isolation switch Thermostats Example: Zones 1 and 9 Optional isolation switch For internal connections see 2.5 For internal connections see 2.5 OMWU1-C Important This link must be fitted (zone 1) (zone 9) Important: Label all actuator cables with the correct zone.

7 2.4 Optiflo wiring 2nd fix KEY Note: colour of wires may vary from those shown. Earth where required. SL L N E Switched Live Live Neutral Earth Live voltage marker sleeve 2.4 Second fix: wireless thermostats Systems with NIBE weather compensating heat pumps Connections to Optiflo wiring unit Note: The appearance of the wiring board will vary slightly with user supplied heat pumps. This enables greater functionality. Internal wiring, wireless base receivers Example: 2 channel wireless option on zones 1 & 9 Single channel base receiver TP5RX1 To heating system isolation switch Optional isolation switch Two channel base receiver TP5RX2 Three channel base receiver TP5RX3 OMWU1-C Important This link must be fitted (zone 1) Important: Label all actuator cables with the correct zone. (zone 9)

8 KEY Note: colour of wires may vary from those shown. Earth where required. SL L N E Standard dial thermostat Dial thermostat rmt230 Switched Live Live Neutral Earth Live voltage marker sleeve 2.5 System with a heat pump Second-fix: Connection to room thermostats Bathroom thermostat bathstat Dial unit Set switch to middle position (if fitted) Wireless dial thermostat Wireless dial unit retbrf 2.5 Thermostat connections Unused Backbox Remote sensor Remove existing sensor on terminals A & B before connecting external sensor Backbox (no cable) Remote sensor Deluxe dial thermostat Dial thermostat ss230 Bathroom thermostat ssbath Backbox Sensor

9 3.1 Electrical components 3.1 System components User-supplied weather-compensating heat pump, or heat pump requiring a call-for-heat, or with a buffer tank Electrical, underfloor heating User supplied heat pumps can either be weather-compensating, or may require a call for heat or run in conjunction with a buffer tank. Depending upon the mode of operation there may be a requirement for a certain number of open-flow zones, the rest being thermostatically controlled. Please pay particular attention to the notes on the drawings as to whether a component is required for the specific operational mode of your heat pump. Room thermostats Systems with a heat pump normally require a proportion of zones to be connected open flow, with no room thermostat or valve actuator. Thermostats are normally used for bedrooms and some other areas that require a top limit to be placed on their temperature. Nu-Heat offers a range of thermostats. Please note that cabling requirements can differ. Each room thermostat is connected through the appropriate Optiflo wiring unit to its corresponding actuator on the Optiflo manifold. This means that each thermostat is individually capable of switching off the heating in that room alone. Thermostats should normally be fitted at light switch height, out of direct sunlight or draughts and not above local heat sources such as towel rails. Standard dial thermostat, bathroom thermostat and sensor The installation of thermostats in bathrooms is governed by IEE regulations. If bathrooms are to operate as separate zones the thermostat must be fitted outside the bathroom with a remote sensor mounted inside the bathroom. The remote sensor is fitted with approximately 3m of flexible cable. Deluxe dial thermostat, bathroom thermostat and sensor The installation of thermostats in bathrooms is governed by IEE regulations. If bathrooms are to operate as separate zones the thermostat must be fitted outside the bathroom with a remote sensor mounted inside the bathroom. The remote sensor is fitted with approximately 3m of flexible cable. Wireless dial thermostat Similar in appearance to the standard dial thermostat but with a digital temperature readout, the wireless dial thermostat offers a solution in properties where it is not possible to install cables to all thermostat positions. The mains powered receiver unit(s) should be sited in an area of good reception and connected to the appropriate Optiflo wiring centre(s). Programmable floor heating timeclock Timeclocks are only required on systems with dial type thermostats. These timeclocks are usually situated near each Optiflo manifold. They are used to set on-off times for the floor heating over a 7-day period. Standard Deluxe Standard bathroom sensor Deluxe bathroom sensor Wireless dial receiver Optiflo wiring unit OMWU1-C The Optiflo wiring centre connects the room thermostats to their corresponding actuator on the manifold, allowing them to individually activate the heating system as required. This wiring centre should be mounted near the Optiflo manifold. Note: An Optiflo manifold that supplies only open-flow zones does not require an Optiflo wiring unit. Wiring and programming instructions In all cases, detailed wiring information is contained in this manual. For operating instructions, please see the Nu-Heat User Guide.

10 KEY Mains cable, 1mm 2 conductors 5-core + earth 4-core + earth 3-core + earth 2-core + earth 2-core flex Heating system isolation switch Call-for-heat wire * Pump control For first fix information local to the heat pump please refer to your A3 Docking Drawing and Heat Pump Manual (Option) * Not required with a buffer tank ** Not required for weather compensating systems Extend to further Optiflo wiring centres if required Floor heating timeclock** Sensor in wet area Bathroom thermostat Dial unit outside wet area OMWC2M-C Optiflo wiring unit (Master) Wireless base receiver (wireless option) Room thermostat (wireless option) Room thermostat (hard wired) Optiflo manifold OMWC2M-C Optiflo wiring unit (Slave - not required for fully open flow areas) Floor heating timeclock** Optiflo manifold Open flow zones do not require thermostats or actuators Room thermostats (hard wired) Optional low temperature control kit (refer to docking drawing) System with a user-supplied weather compensating heat pump, or heat pump requiring a call-for-heat, or with a buffer tank First-fix cabling requirement This schematic diagram shows how various components fit into the system. Items shown in outline only are generally supplied by the customer. Layouts are diagrammatic only and should be read in conjunction with the wiring diagrams. The illustration is not drawn to scale. The appearance of components may vary from those illustrated. Note: Most zones will not require thermostats. Thermostats are generally fitted to limit the temperature in bedrooms. If all zones on one manifold are open flow, then the Optiflo wiring unit is not required. See the A3 Manifold and Zone Information for details of thermostats and wiring boards. 3.2 Underfloor heating schematic 1st fix

11 3.3 Optiflo wiring Master 2nd fix KEY Note: colour of wires may vary from those shown. Earth where required. SL L N E Switched Live Live Neutral Earth Live voltage marker sleeve 3.3 Second fix: Optiflo Master User-supplied systems requiring a call-for-heat from the underfloor heating, or with a buffer tank Connections to Optiflo wiring unit Note: The appearance of the wiring board will vary slightly with user supplied heat pumps. This enables greater functionality. To heating system isolation switch Optional isolation switch From Slave Optiflo wiring centre Thermostats Example: zones 1, 9 and 12 (wireless) For internal connections see 3.7 For internal connections see 3.7 Internal wiring, wireless base receivers Single channel base receiver TP5RX1 Call for heat* Note: Wire link fitted as standard Do not remove Two channel base receiver TP5RX2 Three channel base receiver TP5RX3 Note: Wire link fitted as standard Do not remove Underfloor heating pump * Not required in systems with a buffer tank see heat pump literature Floor heating timeclock (dial stat systems only) Internal wiring Single channel timeclock MP1CP-C (Type TS715) Fit link between terminals L and 1 (zone 1) (zone 9) Important: Label all actuator cables with the correct zone. (zone 12)

12 ucgyugyu KEY Note: colour of wires may vary from those shown. Earth where required. SL L N E Switched Live Live Neutral Earth Live voltage marker sleeve 3.4 Second fix: Optiflo Slave User-supplied systems requiring a call-for-heat from the underfloor heating, or with a buffer tank Connections to Optiflo wiring unit Note: The appearance of the wiring board will vary slightly with user supplied heat pumps. This enables greater functionality. 3.4 Optiflo wiring Slave 2nd fix To heating system isolation switch From Slave Optiflo wiring centre From Master Optiflo or upstream slave Optiflo Thermostats Example: zones 1, 9 and 12 (wireless) For internal connections see?? For internal connections see?? Internal wiring, wireless base receivers Single channel base receiver TP5RX1 Note: Wire link fitted as standard Do not remove Two channel base receiver TP5RX2 Three channel base receiver TP5RX3 Note: Wire link fitted as standard Do not remove Floor heating timeclock (dial stat systems only) Internal wiring Single channel timeclock MP1CP-C (Type TS715) Fit link between terminals L and 1 (zone 1) (zone 9) Important: Label all actuator cables with the correct zone. (zone 12)

13 3.5 Optiflo wiring Master 2nd fix KEY Note: colour of wires may vary from those shown. Earth where required. SL L N E Switched Live Live Neutral Earth Live voltage marker sleeve 3.5 Second fix: Optiflo Master Weather-compensating user-supplied heat pumps Connections to Optiflo wiring unit Note: The appearance of the wiring board will vary slightly with user supplied heat pumps. This enables greater functionality. To heating system isolation switch Optional isolation switch Thermostats Example: zones 1, 9 and 12 (wireless) For internal connections see 3.7 For internal connections see 3.7 Internal wiring, wireless base receivers Single channel base receiver TP5RX1 Note: Wire link fitted as standard Do not remove Two channel base receiver TP5RX2 Three channel base receiver TP5RX3 Note: Wire link fitted as standard Do not remove Note: Wire link must be removed Underfloor heating pump (zone 1) (zone 9) (zone 12) Important: Label all actuator cables with the correct zone.

14 ucgyugyu To heating system isolation switch KEY Note: colour of wires may vary from those shown. Earth where required. SL L N E Switched Live Live Neutral Earth Live voltage marker sleeve 3.6 Second fix: Optiflo Slave Weather compensating user-supplied heat pumps Connections to Optiflo wiring unit Note: The appearance of the wiring board will vary slightly with user supplied heat pumps. This enables greater functionality. Thermostats Example: zones 1, 9 and 12 (wireless) For internal connections see 3.7 For internal connections see 3.7 Internal wiring, wireless base receivers Single channel base receiver TP5RX1 3.6 Optiflo wiring Slave 2nd fix Note: Wire link fitted as standard Do not remove Two channel base receiver TP5RX2 Three channel base receiver TP5RX3 Note: Wire link fitted as standard Do not remove Note: Wire link must be removed (zone 1) (zone 9) (zone 12) Important: Label all actuator cables with the correct zone.

15 3.7 Thermostat connections KEY Note: colour of wires may vary from those shown. Earth where required. SL L N E Dial thermostat rmt230 Switched Live Live Neutral Earth Live voltage marker sleeve Standard dial thermostat 3.7 System with a heat pump Second-fix: Connection to room thermostats Bathroom thermostat bathstat Dial unit Set switch to middle position (if fitted) Wireless dial thermostat Wireless dial unit retbrf Unused Backbox Remote sensor Remove existing sensor on terminals A & B before connecting external sensor Backbox (no cable) Remote sensor Deluxe dial thermostat Dial thermostat ss230 Bathroom thermostat ssbath Backbox Sensor

16 Section 4 & Appendices All systems

17 4.1 All systems KEY Note: colour of wires may vary from those shown. Earth where required. SL L N E Switched Live Live Neutral Earth Live voltage marker sleeve 4.1 Optional hot water loop pump Second-fix: Nu-Heat Aquastar hot water loop Notes: See introduction for wiring safety notes. These diagrams should be read in conjunction with any third party manufacturer documentation. Aquastar 4 hot water loop Switched fused 5A spur Single channel timeclock MP1CP-C (type TS715) Pipe thermostat Domestic hot water pump Internal wiring Internal wiring Attach the pipe thermostat in position as shown here Fit link between terminals L and 1 Return to cylinder From circulating loop Non-return valve Pump Drain purge Pipe stat

18 Appendix A Setting up electrical equipment for commissioning Timeclock Systems with dial thermostats setting up timeclocks The single-channel timeclock supplied with each Optiflo manifold to control the underfloor heating is programmed with factory default settings. Underfloor heating takes longer to heat up and cool down than radiators. If the timeclock is disconnected from the mains a battery symbol will blink on the display. After the 2nd midnight (24-48 hours) the settings will be lost. When mains power is reconnected the factory settings can be restored by inserting a non-metallic object in the R/S hole under the flap. Appendix A Standard Deluxe setting up standard dial thermostats (styles may vary) Normal temperatures 18 C for bedrooms. Standard bathroom Deluxe bathroom setting up bathroom dial thermostats (if fitted) The switch on the side of the unit should be in the central position (where applicable). Normal temperature is 23 C for bathrooms. sensor sensor Wireless dial receiver setting up wireless dial thermostats Check that the base receiver has power. Thermostat: With the thermostat close to the receiver unit; remove dial, press and hold learn button for 3 seconds. The unit will transmit continuously for 5 minutes. Receiver: Press and hold prog and ch1 together (or ch2/ch3 if appropriate) until green light flashes. Refit and adjust thermostat dial. A call-for-heat from the thermostat should cause the correct channel light to show. Check that the thermostat still works in its intended position and that a call-for-heat is sent to the base receiver. If communication fails at a distance the base receiver may need re-siting. Repeat for every thermostat, dedicating each to a different receiver channel.

19 Appendix B Electrical control checklist Systems with a NIBE heat pump Appendix B The pipes below the flow valves on the Optiflo manifold should have been marked during installation of the plumbing with the zones to which they run. It is essential for the operation of the system that room thermostats, actuators and flow valves are correctly matched to each other. To check that the matching is correct: 1 Refer to system plans Check zone details and positions of the Optiflo manifolds. Take note of any zones where room thermostats may be required to activate more than one valve actuator. Zones with dial thermostats (generally bedrooms) 2 Preparation Important: Turn off the heating system isolation switch. Important: Disconnect all circulation pumps running a dry pump will result in damage to the pump and possibly to control equipment. Turn on the heating system isolation switch. Set all room thermostats to minimum. 3 Go to manifold A 4 Start at the first zone All actuators should be off with the central button down. Set one zone room thermostat temporarily high to produce a call-for-heat. Check that the correct electrical actuator opens on the manifold. The central button will lift proud of the white cap after a delay of approximately two minutes. Zone: Flow Rate L/m : Label the actuator cable to match the pipe. 5 Repeat for other zones 6 Go to next manifold 7 Finishing Set the room thermostat to minimum. Repeat stage 4 for all other zones on the manifold that have thermostats. Repeat steps 3 to 5 for each manifold in turn. Important: Turn off the heating system isolation switch. Reconnect all circulation pumps. Turn on the heating system isolation switch. Set all room thermostats to normal setting. 8 Confirmation Sign the label on each Wiring Centre lid to show you have completed and checked the electrical functions. Heat pump control The heat pump must have already been commissioned. NIBE weather compensating heat pump Check that the underfloor heating pump runs whenever the heat pump is operating. (Pump may be inside heat pump casing) Hot water control System with an Aquastar domestic hot water loop Check that the pipe thermostat near the loop pump has been set to approximately 40 C. The loop pump should turn off when the pipe temperature rises above this setting.

20 Appendix B Electrical control checklist User supplied heat pump requiring a call for heat, or with a buffer tank Zone heating control Note: It is essential with systems requiring a call for heat that before performing the following test the heat pump should be switched off or isolated. The pipes below the flow valves on the Optiflo manifold should have been marked during installation of the plumbing with the zones to which they run. Appendix B It is essential for the operation of the system that room thermostats, actuators and flow valves are correctly matched to each other. To check that the matching is correct: 1 Refer to A3 system information Check system type Check zone details and positions of the Optiflo manifolds. Take note of any split zones where room thermostats may be required to activate more than one valve actuator. Systems with timeclock and dial thermostats 2 At every manifold Important: Turn off the heating system isolation switch. Important: Disconnect all manifold pumps running a dry pump will result in damage to the pump and possibly to control equipment. Turn on the heating system isolation switch. Turn all timeclocks to off. Set all room thermostats to minimum. 3 Go to manifold A All actuators should be off with the central button down. Set the local timeclock to on. 4 Start at the first zone Set one zone room thermostat temporarily high to produce a call-for-heat. Check that the correct electrical actuator opens on the manifold. The central button will lift proud of the white cap after a delay of approximately two minutes. Zone: Flow Rate L/m : Label the actuator cable to match the pipe. Set the room thermostat to minimum. 5 Repeat for other zones 6 Reset 7 Go to next manifold Repeat stage 4 for all other zones on the manifold that have thermostats. Set the timeclock to off. Repeat steps 3 to 6 for each manifold in turn. 8 Finishing Important: Turn off the heating system isolation switch. Reconnect all manifold pumps. Turn on the heating system isolation switch. Set all room thermostats to normal setting. 9 Confirmation Sign the label on each Wiring Centre lid to show you have completed and checked the electrical functions.

21 Appendix B Electrical control checklist continued Heat pump control Appendix B The heat pump must have already been commissioned. User supplied heat pump requiring a call for heat Check that the heat pump runs whenever any actuator is open. (It is advised that you avoid switching the heat pump on and off in quick succession turn one thermostat up before turning the last one down during testing). User supplied heat pump with a buffer tank Refer to supplier s information for details of heat pump / buffer tank control. Hot water control System with an Aquastar domestic hot water loop Check that the pipe thermostat near the loop pump has been set to approximately 40 C. The loop pump should turn off when the pipe temperature rises above this setting.

22 Appendix B Electrical control checklist User supplied heat pump with weather compensation Zone heating control The pipes below the flow valves on the Optiflo manifold should have been marked during installation of the plumbing with the zones to which they run. It is essential for the operation of the system that room thermostats, actuators and flow valves are correctly matched to each other. To check that the matching is correct: Appendix B 1 Refer to system plans Check zone details and positions of the Optiflo manifolds. Take note of any zones where room thermostats may be required to activate more than one valve actuator. Zones with dial thermostats (generally bedrooms) 2 Preparation Important: Turn off the heating system isolation switch. Important: Disconnect all circulation pumps running a dry pump will result in damage to the pump and possibly to control equipment. Turn on the heating system isolation switch. Set all room thermostats to minimum. 3 Go to manifold A 4 Start at the first zone All actuators should be off with the central button down. Set one zone room thermostat temporarily high to produce a call-for-heat. Check that the correct electrical actuator opens on the manifold. The central button will lift proud of the white cap after a delay of approximately two minutes. Zone: Flow Rate L/m : Label the actuator cable to match the pipe. 5 Repeat for other zones 6 Go to next manifold 7 Finishing Set the room thermostat to minimum. Repeat stage 4 for all other zones on the manifold that have thermostats. Repeat steps 3 to 5 for each manifold in turn. Important: Turn off the heating system isolation switch. Reconnect all circulation pumps. Turn on the heating system isolation switch. Set all room thermostats to normal setting. 8 Confirmation Sign the label on each Wiring Centre lid to show you have completed and checked the electrical functions. Heat pump control The heat pump must have already been commissioned. User supplied heat pump with weather compensation Check that the underfloor heating pump runs whenever the heat pump is operating. (Pump may be inside heat pump casing) Hot water control System with an Aquastar domestic hot water loop Check that the pipe thermostat near the loop pump has been set to approximately 40 C. The loop pump should turn off when the pipe temperature rises above this setting.

23 If there is any aspect of the installation that you do not understand, please contact Nu-Heat Customer Support for advice. ucgyugyu All illustrations and diagrams in this manual are the property of Nu-Heat. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise without prior written permission of Nu-Heat. Nu-Heat UNDERFLOOR & RENEWABLES Heathpark House, Devonshire Road Honiton, Devon ex14 1sd Tel: Fax: Web: ufh@nu-heat.co.uk SL1 N L E N L CMN SL2 SL1 N L E N L CMN A SL1 SL2 B C E N L CMN SL3 5 6