Hewalex PCWU 2.5kW Instructions Manual

Hewalex PCWU 2.5kW Instructions Manual

Instructions for fitter
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EQUIPMENT CHARACTERISTICS
Utility water heat pump - PCWU 2.5kW uses heat contained in outdoor or
ventilation air for high-efficiency hot utility water production.
The temperature of outlet air from heat pump is 5-10°C lower. It may be
used to cool rooms in summertime.
Heat pump PCWU 2.5kW is a complete unit, which is very easy to install. The following tools and accessories will
be needed for fitting:
- Philips screwdriver PZ2
- flat-head power screwdriver 2mm
- flat wrenches 17, 27, 41
- welding machine in case of PP tubes
- drilling machine with drill fitted for building wall, in order to fasten
heat pump holder in a stable way
- drill rig ND150 in case of air-ducts going outside building (option,
possibility to apply other technologies)
NOTE: The tools and equipment listed above include those most frequently used in installations. Each installation
may have its individual requirements, which would make it necessary to apply other tools and extra accessories.

Table of Contents

1. Storage and handling .................................................................................. 2
2. Choosing installation location ...................................................................... 2
3. Installation ................................................................................................... 4
4. Maintenance .............................................................................................. 10
5. Heat pump safeguards ............................................................................... 11
6. The unit cut-off from power system ........................................................... 12
7. Controller description (extended version for fitter) .................................... 12
8. Alarms review. ............................................................................................ 16
9. Controller messages review ...................................................................... 17
Dimensions . .................................................................................................. 18
Technical parameters list ............................................................................... 19
Wiring diagram. ............................................................................................. 20
Guarantee certificate ................................................................................... 21
Checklist (for fitter) ....................................................................................... 22
NAME
FITTER
INSTRUCTIONS FOR FITTER
cat. no. HEWALEX: 91.10.13
- on-wall fixing grip with dowels fitted for building wall (option)
- 3 cut-off valves
- 2 drain valves
- water filter
- water tube, min. diameter Φ20mm inside, insulated (recommended:
plastic)
- air tube (depending on an installation, additionally: ducts, choke
valves, air guides)
- masking cover for ventilation ducts going outside building
- 4-wire cable 0.75mm², to extend controller if needed
- protective pipe to cover controller cable
- pipe unions and gaskets for circulating pump
- check valve (when pump has shared stub pipe for return to the tank
with circulation)
- pipe unions and nipples GZ 3/4" for screwing-in in heat pump
(easily removable)
- a hose to extend condensate discharge
- thread packing (e.g. hemp fibres, Teflon thread)
Also read User's Instructions prior to fitting!
PCWU 2.5kW

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Summary of Contents for Hewalex PCWU 2.5kW

  • Page 1: Table Of Contents

    The temperature of outlet air from heat pump is 5-10°C lower. It may be used to cool rooms in summertime. Heat pump PCWU 2.5kW is a complete unit, which is very easy to install. The following tools and accessories will be needed for fitting:...
  • Page 2: Storage And Handling

    Storage and handling During storage heat pump should be protected by foil and original factory cardboard packaging. Equipment storage temperature should range within -10 to 45°C. The unit cannot be flooded with water during storage. Heat pump should be carried at angle up to 60°. After handling heat pump should be left in its normal position for 1 hour before it is started up.
  • Page 3 For the same reason, drawn air should be free from dusts. Connection to mechanical ventilation In case of the PCWU 2.5kW heat pump, it is possible to connect the pump to mechanical ventilation. If air handling unit has delivery reaching 350-500 m /h, it will be fully sufficient source of air for heat pump.
  • Page 4: Installation

    Control may be also solved by way of modifying heat pump and ventilation system operation times. Time interval should be set in air handling unit guaranteeing that heat pump has suitable air delivery all the time. In case if air handling unit switches off earlier, heat pump fan will not be capable of overcome installation resistance, and thus air flow through evaporator will decrease considerably.
  • Page 5 diagram no. 2 Circulating pump may be connected to terminals in electric board - R L02 (OUT C). temperature sensors in the tank Circulating pump with power exceeding 100W must be hot water powered via a relay. air inlet temperature sensor HUW tank circulating pump - (brought to the point, where duct starts)
  • Page 6 Pump for solid fuel fired boiler should be connected to R L 09 (OUT P) in electric board. Circulating pump with power exceeding 100W must be diagram no. 5 powered via a relay. temperature sensors in the tank Temp. sensor T4 should be installed at boiler output. hot water Electric heater at tank bottom should be connected to circulating pump -...
  • Page 7 2. Control with properly selected resistors instead of HUW [hot utility water] temperature sensor in the boiler. Electric plate Relay HUW sensor of an automatic boiler Exemplary chart of temperature sensor resistances for various boiler manufacturers. Boiler manufacturer R1 resistor [kll] R2 resistor [kΩ] Boiler manufacturer R1 resistor [kll]...
  • Page 8 diagram no. 8 Solar thermal collectors are operated via solar controller. It is possible to connect heat pump controller to solar controller and operate it as a master controller (depending on solar controller version). solar thermal collectors Other equipment, if it is to be added to the system, it should be connected as shown in previous diagrams.
  • Page 9 Filter soiling results in restricted air flow, which in turn deteriorates heat pump efficiency. Extended ventilation set. HEWALEX offer includes connection accessories. Electric power supply Heat pump should be powered with single-phase current 230V. Connect original power cable to an electric socket (cable feeding the socket: min.
  • Page 10: Maintenance

    Maintenance Supply ducts and air filter Air filter cleaning should pose no problems. Supply air line should be provided with a filter at air inlet to the heat pump. The filter should be checked and cleaned if necessary at 2-3 month intervals. Filter soiling will result in air flow choking, which leads to drop in heat pump efficiency.
  • Page 11: Heat Pump Safeguards

    Heat pump safeguards Evaporator defrosting mode Evaporator defrosting indicates the state, in which heat pump removes ice from the evaporator. Ice in evaporator disturbs and reduces air flow, which in turn decreases the uptake of free heat and additional working load for compressor. Evaporator covered with Defrosting depends on the indications of temperature sensor (T8) fitted on the...
  • Page 12: The Unit Cut-Off From Power System

    Compressor safeguards After switching on the heat pump, compressor will activate only one minute past fan activation. The same situation occurs at heat pump deactivation - after compressor shut down, fan in rundown will be working for one more minute. During normal operation compressor should not start up more often than every 8-10 min.
  • Page 13 External control unit Heat pump deactivation [YES/NO, factory setting YES] Electric heater E deactivation [YES/NO, factory setting YES] Electric heater P deactivation [YES/NO, factory setting YES] Gas-fired boiler shutdown [YES/NO, factory setting YES, shown in diagrams no. 4,7,9] Shutdown of pump F for solid fuel fired boiler B [YES/NO, factory setting YES, shown in diagrams no. 3,8,9] Passwords User...
  • Page 14 Circulating pump operation mode This parameter allows setting circulating pump operation so as to make it work in compliance with heat pump (that is only in heating mode), or continuous operation (e.g. the system venting). Fan operation mode This option allows changing fan rotational speed. 3 operation options are available: 1) MAX.
  • Page 15 Maximum defrosting duration Defrosting duration is the second parameter. Should it be exceeded, the pump will also return to normal operation (it is enough if one of the two conditions is satisfied). Modification of defrosting parameters by a person, who does not know the problem of heat pumps operation very well, may result in deteriorated unit operation efficiency! External control unit...
  • Page 16: Alarms Review

    Clean evaporator and air filter pump stoppage). Required contact with (Low Pres) Incorrect operation low-pressure Report failure to HEWALEX service service. control Check pressure control operation Damaged expansion valve Damaged T8 or T9 sensor Excess of R410a medium in the system...
  • Page 17: Controller Messages Review

    Controller messages review Message Definition ExtOFF External bridge open HPOFF Heat pump switched off (manually or by time program) LowPres Alarm no. 17 HighPres Alarm no. 18 Defrost Evaporator defrosting STOP 180 (..., STOP 1) Countdown until compressor restart LowCOP The T1 temp.
  • Page 18: Technical Data Dimensions

    TECHNICAL DATA Dimensions cat. no.: HEWALEX: 91.10.13 Water OUTLET from heat pump Water INLET to heat pump R410a medium pressure gauge after compressor Electric chokes View from bottom: position of condensate discharge stub pipe. condensate discharge...
  • Page 19: Technical Parameters List

    Technical parameters list Model PCWU 2.5kW Heating power (A7/W30-35) 2.51 To the system with the tank >80 Heat pump supply power (A7/W30-35) 0.67 COP efficiency coefficient (A7/W30-35) COP efficiency coefficient (A15/W15-45) 4.35 Supply voltage/frequency V~/Hz 1~230/50 Number of compressors Compressor type rotary Max.
  • Page 20: Wiring Diagram

    Wiring diagram PUMP IN External control unit Compressor Controller IN External control unit T1: Ambient temperature [S01] OUT C: Circulating pump [RL02] T2: Temp. at tank bottom [S02] OUT H: Circulating pump [RL03] T3: Temp. at tank top [S03] 4WV: 4-way valve [RL04] T4: Solid fuel fired boiler temp.[S04] FM: fan speed - 1 [RL05] T5: Void [S05]...
  • Page 21: Guarantee Certificate

    2. During warranty period the user is entitled to free of charge repairs of any damage occurring through the fault of manufacturer. 3. HEWALEX is discharged from any warranty liability for faulty unit operation, which may occur due to its use contrary to Operating Manual instructions, as well as carrying out any repairs and modifications by unauthorised persons, and due to any other damage occurring not through the fault of the manufacturer.
  • Page 22: Checklist (For Fitter)

    INSTALLATION CHECKLIST for the PCWU 2.5kW heat pump Installation checklist has been developed as a response to ensure improved quality of systems containing HEWALEX heat pumps. We care very much about satisfying clients using our products for a long time - however, besides heat pump itself, this also requires a supporting system meeting highest quality standards.
  • Page 23 Equipment prices may be covered. Personal data will be used only for warranty-related purposes for the purchased equipment, and will be handled by authorised persons employed at HEWALEX Sp. z o.o. [Ltd.] Sp. komandytowa [Limited Partnership], seated in Czechowice-Dziedzice, ul.Słowackiego 33, Poland. The whole personal information acquired is protected and used according to the terms specified in the following acts: of August 29, 1997, on personal data protection (O.J.

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