Robur GAHP-AR, Installation, Use And Maintenance Manual

Page 1: ...GAHP AR air water reversible absorption heat pump gas powered Installation use and maintenance manual...

Page 2: ...f this Installation use and maintenance manual other than for personal consultation must be previously authorised by Robur Corporation The rights of those who have legitimately filed the registered tr...

Page 3: ...quality p 22 3 8 System filling p 23 3 9 Fuel gas supply p 23 3 10 Combustion products exhaust p 23 3 11 Flue gas condensate discharge p 24 3 12 Defrosting water drainage p 25 4 Electrical installer p...

Page 4: ...Gas Utilization Efficiency efficiency index of gas heat pumps equal to the ratio between the thermal energy pro duced and the energy of the fuel used relative to NCV net calo rific value First start...

Page 5: ...solution is contained in the sealed circuit The solution is harmful for health if it is in gested inhaled or comes in contact with the skin In the event of coolant leak keep away and disconnect the po...

Page 6: ...tem Other applicable provisions and standards The design installation operation and maintenance of the sys tems shall be carried out in compliance with current applicable regulations depending on the...

Page 7: ...hiller and the heat taken away from the cooled environment via the hydraulic cir cuit is dissipated towards the outside via the air cooled finned coil 1 1 1 1 Heating in winter The appliance uses the...

Page 8: ...nti vibration joints 10 1 2 48 1 2 38 3 8 A 60 7 8 50 1 2 50 3 4 20 7 8 33 1 2 4 27 3 8 A 5 7 8 Figure 1 2 Service plate with plumbing and gas connections A Water outlet connection 1 1 4 F B Water inl...

Page 9: ...Internal components front view 1 Tapping point for flue analisys 2 Combustion air intake 3 Combustion blower 4 Gas valve 5 Electrical panel 6 Oil pump 7 Water inlet connection 1 1 4 F 8 Water outlet...

Page 10: ...Features and technical data 10 1 Figure 1 4 Internal components left side view 1 Generator fins temperature probe 2 80mm flue gas exhaust 3 Flame sensor ignition electrodes 1 2 3...

Page 11: ...al GAHP AR 11 1 Figure 1 5 Internal components right side view 1 Safety valve 2 Return temperature probe 3 Defrosting valve 4 TG generator temperature probe 5 Limit thermostat 6 Outlet temperature pro...

Page 12: ...rvicing the controls Wiring errors can cause improper and dan gerous operation Figure 1 6 GAHP AR wiring diagram 1 5 ELECTRONIC BOARDS The unit s electrical board contains Electronic board S61 Figure...

Page 13: ...robe input SPI Not used P8 GND L H CAN bus connector J1 CAN bus Jumper A1 A2 Connections for actuator s limit switches TF Not used TL Generator limit thermostat input FL Water flow switch input FS5 Bo...

Page 14: ...timer switch contactor fitted with voltage free NO contact This system only provides elementary control on off with fixed setpoint temperature hence without the im portant functions of system 1 It is...

Page 15: ...inch WC 0 048 Dimensions width 33 1 2 depth 48 1 2 height 50 3 4 6 Weight in operation pounds 838 shipping pounds 883 General information Cooling fluid ammonia R717 pounds 15 7 water H2O pounds 22 0 1...

Page 16: ...20 6 86 F Outlet 104 F Outlet 122 F Outlet Water flow GPM Pressure drop feet of head Cooling Table 1 3 Cooling mode pressure drop Water flow rate Outlet water temperature GPM 37 4 F 44 6 F 50 0 F ft...

Page 17: ...to operate under partial load conditions and in non stationary operation Table 1 5 GAHP AR cooling capacity kBtu hr External air temperature dry bulb F Hot water outlet temperature F 37 4 44 6 50 0 T...

Page 18: ...g water drainage In winter it is normal for frost to form on the finned coil and for the appliance to perform defrosting cy cles To prevent overflowing and damage provide for a drain age system Acoust...

Page 19: ...necessary provide a maintenance walkway around the ap pliance Although approved for installation on a combustible base the appliance must not be installed directly on the roof surface Use base support...

Page 20: ...ydraulic system into two parts primary and secondary circuit uncoupled by a hydraulic separator or possibly by a tank that also acts as inertial tank buffer Water flow rate The GAHP AR unit works with...

Page 21: ...ng 1 safety valve 1 expansion tank of the individual unit The appliance is not equipped with an expansion tank therefore it is necessary to install a suitable expansion tank sized in relation to the m...

Page 22: ...1 26 1 47 2 79 Ethylene glycol correction factors Percent ethylene glycol 10 15 20 25 30 35 40 Approximate freezing point in F 25 21 17 11 5 0 10 Capacity factor multiplier 1 0 98 0 96 0 95 0 93 0 92...

Page 23: ...ction between the appliance and the gas piping An approved union should be installed in the gas line near the unit and downstream of any external shut off valve that may be required by local codes Fig...

Page 24: ...ossible flue If necessary the appliance may be connected to a flue To size the flue refer to following Table 3 3 p 24 The flue must be designed sized tested and constructed by a skilled firm with mate...

Page 25: ...responsible for any damages caused by the failure of the grounding system Installation must comply with applicable regulations in force based on the installation Country and site in mat ters of safet...

Page 26: ...accidental pulling Figure 4 1 Wiring for a single unit with pump absorbed current less than 4 A 1 General switch 2 Use a 15 A time lag fuse on L wire 3 Ground pin 4 Ground cable has to be connected by...

Page 27: ...ly or OPEN Detail B if the node is intermediate two connected CAN bus cable sections 4 Connect the DDC to the CAN bus cable according to the in structions of the following Paragraphs and DDC Manual Fi...

Page 28: ...N bus cable section only or OPEN Detail B if the node is intermediate two connected CAN bus cable sections Figure 4 5 Connection of the CAN bus cable to the control panel DDC Direct Digital Control GN...

Page 29: ...ltage ter minal block located in the electrical control panel as shown in Figure 4 1 p 26 the minimum circuit ampacity for the unit must be increased above that listed in the technical data Table 1 1...

Page 30: ...with its design following the instructions supplied by the manufacturer and respecting current regulation The project must have been carried out by a skilled professional Check personally that all of...

Page 31: ...itable panel mov ing it to the ON position Power up the DDC if provided Switch on the appliance by means of the provided control device DDC or external request Adjust the gas pressure to the appliance...

Page 32: ...r adjustment 7 Open control switch and make sure that the appliance is off 8 Remove manometer and pressure tap Replace plug in gas valve 9 Turn on the appliance by closing control switch Check all gas...

Page 33: ...ve fuse holder The maximum current carrying capacity of the N O Contact is 4 A Paragraph 4 5 p 29 Isolation relay An isolation relay must be used to separate the appli ance s transformer from any addi...

Page 34: ...rder e g display 2 _20 param eter 20 in menu 2 7 Turn the knob clockwise to scroll down the other param eters in the menu the codes will be displayed in order e g display 2 _20 2 _21 2 _25 parameters...

Page 35: ...the pre existing value press the knob again otherwise go to step 3 3 Turn the knob to modify the value increasing or decreas ing it and press it to set the new value 4 Exit menu 3 and from the menu l...

Page 36: ...also be done by the user Any operation on internal components may exclusively be performed by the AT Before performing any operation switch off the appli ance by means of the control device DDC or ex...

Page 37: ...er down and out to remove it from gen erator housing Be careful not to distort or damage the burner tube or the flame sensor ignition electrodes assemblies in the generator housing 7 Position the burn...

Page 38: ...ke sure that the main power supply switch GS fitted by the electrical installation technician on a suitable panel Figure 4 1 p 26 is in the ON position Check that the gas supply valve is open Check th...

Page 39: ...unit and probe 606 X X Low ambient temperature Warning will automatically reset after condition is corrected NA Check location of the unit and probe 607 X X High condenser inlet temperature Warning wi...

Page 40: ...the problem persists contact AT 631 X Water temperature above operational limits in heating mode FW ver 3 026 or later Warning will reset automatically when tempe rature drop by 3 6 F below limit NA L...

Page 41: ...ct AT 656 X X Ambiguous reversing valve position NA Reset by powering unit off then on An automatic reset can occur if after a new transition from one mode to the other the micro switch status emerges...

Page 42: ...fuse Bad connection between transformer and low voltage connection to board Faulty transformer If the problem persists contact AT 685 X X Incorrect unit types NA Error can be reset via power off New...

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Page 44: ...ndly energy efficiency products through the commitment and caring of its employees and partners Revision H Code D LBR364 19 MCL SVI 006 11 06 2020 Robur Corporation advanced technologies for air condi...