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Installation, use and maintenance manual

gas powered

absorption chiller

GA ACF

Содержание GA ACF

Страница 1: ...Installation use and maintenance manual gas powered absorption chiller GA ACF ...

Страница 2: ...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 trademarks contained within this publication are not affected With the aim of continuously improving the quality of its products Robur Corporation reserves the right to modify the data and contents of this Installation use and...

Страница 3: ...22 3 5 Antifreeze function p 23 3 6 Antifreeze liquid p 23 3 7 System water quality p 23 3 8 System filling p 24 3 9 Fuel gas supply p 24 4 Electrical installer p 25 4 1 Warnings p 25 4 2 Electrical systems p 25 4 3 Electrical power supply p 25 4 4 Set up and control p 26 4 5 Water circulation pump p 29 4 6 With more than one GA ACF unit p 30 5 First start up p 31 5 1 Preliminary checks p 31 5 2 F...

Страница 4: ...y produced and the energy of the fuel used relative to NCV net calorific value First start up appliance commissioning operation which may only and exclusively be carried out by an AT S61 Board electronic board on the GA unit to control all func tions and to provide interface with other devices and with the user III WARNINGS III 1 GENERAL AND SAFETY WARNINGS Installer s qualifications Installation ...

Страница 5: ...ed circuit Electrocution hazard Disconnect the electrical power supply before any op eration on appliance components For electrical connections exclusively use compli ant components and according to the specifications provided by the manufacturer Ensure the appliance cannot be accidentally switched back on Grounding Electrical safety depends on effective grounding system correctly connected to the...

Страница 6: ...n and in accordance with the manufacturer s instructions In particular regulations regarding the following shall be complied with Gas systems and equipment Electrical systems and equipment Heating and cooling systems heat pumps and chillers Fire safety and prevention Any other applicable law standard and regulation III 3 EXCLUSIONS OF LIABILITY AND WARRANTY Any contractual or extra contractual lia...

Страница 7: ...tat Differential air pressure switch on the combustion circuit Sealed circuit safety relief valve Bypass valve between high and low pressure circuits Ionization flame control box Dual gas valve Antifreeze functions for hydraulic circuit Heat recovery exchanger circulating pump relay HR version only Versions The GA ACF unit is available in the following versions ACF standard for residential retail ...

Страница 8: ...Gas fitting Ø 1 2 F 6 1 2 4 1 4 5 7 8 7 7 8 12 7 1 8 G E A B Figure 1 3 ACF HR Service plate with plumbing and gas connections G Gas fitting Ø 1 2 F Chiller CHILLED WATER D Outlet water fitting Ø 1 1 4 F C Water inlet connection Ø 1 1 4 F Recovery exchanger HOT WATER A Water outlet connection Ø 1 1 4 F B Water inlet connection Ø 1 1 4 F 7 1 8 5 7 8 7 7 8 9 7 8 12 3 16 3 1 8 4 1 4 6 11 16 11 15 16 ...

Страница 9: ... 9 1 1 3 COMPONENTS Figure 1 4 Internal components front view 1 Combustion air intake 2 Combustion blower 3 Gas valve 4 Electrical panel 5 Oil pump 6 Water inlet connection Ø 1 1 4 F 7 Water outlet connection Ø 1 1 4 F 8 Gas connection Ø 1 2 F 9 Room temperature probe 10 Fan ...

Страница 10: ...Features and technical data 10 1 Figure 1 5 Internal components left side view 1 Ignition transformer 2 Flue thermostat 3 Ignitor and flame detectors ...

Страница 11: ...se and maintenance manual GA ACF 11 1 Figure 1 6 Internal components right side view 1 Safety valve 2 Return temperature probe 3 TG generator temperature probe 4 Limit thermostat 5 Flow temperature probe 6 Flow switch 7 TCN probe 1 2 5 6 7 3 4 ...

Страница 12: ...ts Label all wires prior to disconnection when servicing the controls Wiring errors can cause improper and dan gerous operation In Figure 1 7 p 12 below thermostat THL hot water outlet thermostat is placed only on ACF 60 00 HR Figure 1 7 GA ACF unit wiring diagram 1 5 ELECTRONIC BOARDS The appliance s electrical panel contains Electronic board S61 Figure 1 8 p 13 with microproces sor it controls t...

Страница 13: ...ected to a control de vice selected from DDC controller external request 1 6 1 Control system 1 with DDC GAHP unit ON OFF The DDC controller is able to control appliances a single GA unit or even several Robur GAHP GA AY units in cascade only in ON OFF mode non modulating For more details refer to the DDC RB100 RB200 Manuals and the Design Manual DDC Controller The main functions are Setup and con...

Страница 14: ...ting consumption 6 unit only kW 0 75 Minimum circuit ampacity MCA unit only A 8 0 Maximum over current protection MOCP A 10 9 Installation data Gas consumption natural gas nominal CFM 1 58 7 Water content inside the apparatus hot side gallons 0 79 cold side gallons 0 79 Water fitting thread FPT 1 1 4 Gas connection thread FPT 1 2 Dimensions width 33 1 2 depth 48 1 2 height 50 3 4 Weight in operati...

Страница 15: ...et water temperature 44 6 F 2 00 4 00 6 00 8 00 10 00 12 00 6 00 7 00 8 00 9 00 10 00 11 00 12 00 13 00 14 00 15 00 ACF60 00 HT TK HR Water flow GPM Pressure drop feet of head LB Figure 1 10 ACF60 00 LB unit internal pressure drop as a function of water flow rate 8 00 10 00 12 00 14 00 16 00 18 00 6 00 7 00 8 00 9 00 10 00 11 00 12 00 13 00 14 00 15 00 ACF60 00 LB Ethylene glycol 40 water flow GPM...

Страница 16: ...oling request the unit may often need to operate under partial load conditions and in non stationary operation Table 1 3 ACF60 00 TK cooling capacity Btu hr Ambient air temperature F Chilled water outlet temperature F 37 4 41 0 44 6 48 2 10 4 71410 71410 72015 72620 17 6 70805 70805 71410 72015 Ambient air temperature F Chilled water outlet temperature F 37 4 41 0 44 6 48 2 24 8 70200 70200 70200 ...

Страница 17: ...713 47476 49240 50571 51901 86 0 44905 46822 48738 50155 51571 87 8 44033 46109 48186 49690 51194 89 6 43093 45337 47580 49174 50768 91 4 42084 44502 46919 48605 50291 Ambient air temperature F Chilled water outlet temperature F 14 0 19 4 23 0 28 4 32 0 93 2 41003 43602 46201 47981 49760 95 0 39847 42635 45400 47299 49174 96 8 38614 41599 44584 46557 48530 98 6 37302 40491 43681 45753 47825 100 4 ...

Страница 18: ... 14344 21174 29029 33469 Table 1 11 ACF60 00 HR Heat capacity of the heat recovery unit for conditions other than nominal ones flow rate 8 8 GPM Heat capacity Btu hr flow rate 8 8 GPM Hot water return temperature to the recovery F Ambient air temperature F 59 68 77 86 95 104 113 68 97333 104709 110993 86 76158 83399 91868 97333 104 51228 61302 72094 78549 85106 92210 99040 122 30258 39275 47813 54...

Страница 19: ...l near the exhaust of flues chimneys or hot polluted air In order to work correctly the appliance needs clean air Acoustic issues Pre emptively assess the appliance s sound effect in connec tion to the site taking into account that building corners en closed courtyards restricted spaces may amplify the acous tic impact due to the reverberation phenomenon 2 4 MINIMUM CLEARANCE DISTANCES Distances f...

Страница 20: ...ion on a combustible base the appliance must not be installed directly on the roof surface Use base supports for the installation Figure 2 4 p 20 Installation on roofs directly above sleeping quarters should be avoided if possible If not possible special consideration must be given to the transmission characteristics of the building structure The use of vibration isolators under the equipment acou...

Страница 21: ...e hydraulic 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 GA unit works with constant water flow and ON OFF opera tive mode System and components must be designed and installed con sistently The water lines should also be sized so the maximum velocity of the water monoethylene ...

Страница 22: ...mary plumbing circuit Always provide near the appliance on water piping both output and input 2 antivibration joints on water fittings 2 pressure gauges 2 isolation ball valves on the inlet water piping 1 separator filter 1 inlet flow control device if the circulation pump is with constant flow 1 water circulation pump towards the appliance on the output water piping 1 safety valve 1 expansion tan...

Страница 23: ... using a glycol depending on its Table 3 1 Technical data for filling the hydraulic circuit Propylene glycol correction factors Percent propylene glycol 15 20 25 30 35 40 50 Approximate freezing point in F 24 18 15 9 5 5 30 Capacity factor multiplier 1 0 992 0 986 0 972 0 960 0 950 0 928 0 878 Pressure drop multiplier 2 1 04 1 08 1 13 1 21 1 26 1 47 2 79 Ethylene glycol correction factors Percent ...

Страница 24: ... the Propane Installation Code CAN CGA B149 2 or applicable provisions of the local building codes Gas connection 1 2 F on the right at the bottom connection plate Figures 1 2 p 8 and 1 3 p 8 Install an anti vibration connection 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 requ...

Страница 25: ...ating pump with no request from the appliance Isolation relay An isolation relay must be used to separate the appli ance s transformer from any additional equipment hav ing a transformer or damage to the S61 board will occur Isolation relays must have a 24 V AC coil which does not present more than 0 25 A load to the control circuit The manufacturer cannot be held responsible for any damages to pe...

Страница 26: ...le section s forming an open lin ear communication network never star or loop shaped CAN bus signal cable The DDC controller is connected to the appliance through the CAN bus signal cable shielded compliant to Table 4 1 p 26 admissible types and maximum distances For lengths 650 ft and max 4 nodes e g 1 DDC 3 GAHP a simple 3 x 18 AWG shielded cable may even be used Table 4 1 CAN bus cables type CA...

Страница 27: ...L GND Data signal wires ref cables table A Terminal node connection 3 wires J1 and J21 closed B CAN bus cable shield C Insulating tape to protect the shield of the CAN bus cable D Eyelet terminal and fixing screw F2 5 2 PUMP 230V N J10 CONTACT BK WHBR FAN L NO L N 230V MAIN N L BOX IGN 3 6 W R Y F4 0 F3 F1 24ac2 0 V 1 4 JP11 FL 24 ac1 TL TA2 TCN THMFTHRF TG TA TA1 JTAG SRT2 SRT1 JP12 A2 P6 TF A1 G...

Страница 28: ...OSED J21 Jumpers Detail A if the node is terminal one connected CAN 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 GND Common data L Data signal LOW H Data signal HIGH J21 Jumpers CAN bus on DDC board A Detail of terminal node case 3 wires J21 jumper ...

Страница 29: ... pump It must be mandatorily controlled from the S61 electronic board If power for the water pump is taken from the high voltage 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 p 14 to accommodate the additional current draw of the water pump installed T...

Страница 30: ...2 5 NO CONTACT PUMP 230V MAIN 230V IGN BOX L N L N N L BK WH BR R W Y O FAN BY THE INSTALLER JP11 P6 J10 F2 F1 F3 T T A1 TF TL FL 0 V P8 A2 THMF THRF TCN TA TG TA1 TA2 SRT1 SRT2 JP12 SP1 JTAG GND L H 24ac1 24ac2 SCH R1 PMR 1 IP KPc KPs KPt L N 11 14 4 6 WITH MORE THAN ONE GA ACF UNIT Figure 4 9 p 30 shows typical wiring for 2 or more GA ACF units It is always necessary to provide a safety transfor...

Страница 31: ...d maintenance in safety Appliance switched on off with the main switch instead of the control device provided DDC or external request Appliance defects or faults caused during transport or instal lation Gas smell Non compliant mains gas pressure Antifreeze monoethylene glycol not added to the system water Paragraph 3 6 p 23 All situations that are potentially hazardous Should any abnormal installa...

Страница 32: ...07 3 33 3 58 36 33 975 2 67 2 91 3 16 3 40 37 26 1000 2 54 2 77 3 00 3 23 38 19 1025 2 42 2 64 2 86 3 08 39 12 1050 2 30 2 51 2 72 2 93 40 05 1075 2 20 2 40 2 60 2 80 40 98 1100 2 10 2 29 2 48 2 67 41 92 1125 2 01 2 19 2 37 2 55 Our reference MJ m Btu CU FT Specific gravity of natural gas 0 555 MJ m Btu CU FT Specific gravity of natural gas 0 55 0 60 0 65 0 70 37 78 1014 2 50 The conditions referr...

Страница 33: ...g D in a safe place to be re used with the new nozzle 6 Attach the new gas nozzle to the gas valve using the 4 screws to secure valve flange be sure to put the o ring in the proper site 7 Tighten the ring nut and re attach wires to the valve 8 Restore the gas and electrical supply 9 Adjust the gas pressure for the gas to be used following the instructions reported in Paragraph 5 4 p 32 10 Replace ...

Страница 34: ...er example indicates entry 0 menu 0 indicates entry 2 menu 0 Menu for the user but for the installer and AT as well The menu 0 display only for functional data detected in real time The menu 1 display only for current values of appliance parameters Menu 2 control to execute flame control unit reset opera tions reset errors Paragraph 7 5 p 38 Menu 3 display and setting to set the value of some sys ...

Страница 35: ...ition control box continuously monitors the flame sen sor for ignition If the flame sensor detects flame the ignition transformer is de energized immediately and the gas valve and pre mixer blower remain energized Should the burner fail to light or flame is not detected during the first trial for ignition the gas valve and ignition transformer are de energized and the ignition control box begins a...

Страница 36: ...of the external control device Switch on Switch on the appliance using the on off command placing it in the ON position After switching on with the control in normal operating condi tions the appliance starts stops automatically according to the user s cooling needs supplying chilled water at the programmed temperature Although the external request is in the ON position this does not mean the appl...

Страница 37: ...ways wear safety googles 7 2 2 Condenser fan height check For proper airflow the distance between the top edge of the fan blade and the top panel must be 1 1 4 If the fan is at an improper height adjust the location of the mounting strap around the fan motor Figure 7 1 Section view showing proper fan height 1 Section view 2 Mounting strap 3 Fan blade edge top panel Note some details have been remo...

Страница 38: ...appliance you must know and perform the procedure concerning the issue signalled and identified by the code Paragraph 8 1 p 40 Only act if you are familiar with the issue and with the pro cedure technical expertise and professional qualifications might be required If you do not know the code the problem or the procedure or you do not have sufficient skills and in any case of doubt contact the AT L...

Страница 39: ...Close the gas valve 4 If necessary add water with glycol if the appliance is disconnected from the power and gas mains the active antifreeze protection is missing Paragraph 3 5 p 23 How to reactivate the appliance after long periods of inactivity Before reactivating the appliance the operator mainte nance technician of the system must first of all Check whether any maintenance operations are requi...

Страница 40: ...r condition is corrected NA Check location of the unit and probe 7 High condenser inlet temperature Warning will reset automatically when temperature drops to 149 F Error can be reset via S61 DDC or power off Hydraulic Pump malfunction or hydraulic pump low on oil Check generator TG temp probe connection to pipe If the problem persists contact AT 8 Flame controller error NA Error can be reset via ...

Страница 41: ...ssible loss of flame sensing after 5 minutes of operation Possible gas valve issue after 5 minutes of operation If the problem persists contact AT 32 Water temperature below operational limits in cooling mode FW ver 3 026 or later Warning will reset automatically when temperature increa ses by 3 6 F above limit NA Light load conditions Low water flow If the problem persists contact AT 51 Activatio...

Страница 42: ...roblem persists contact AT 87 88 89 90 Ambient temperature sensor fault TA NA Error can be reset via S61 DDC or power off Broken or short in sensor wire Possible bad connection at control board If the problem persists contact AT 91 Electronic board fault NA Error can be reset via power off If the problem persists contact AT NA Not Applicable ...

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Страница 44: ... 1800 F 812 422 5117 www robur com us sales robur com 11 06 2020 19 MCL SVI 006 Code D LBR323 Revision P Robur is dedicated to dynamic progression in research development and promotion of safe environmentally friendly energy efficiency products through the commitment and caring of its employees and partners Robur mission ...

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