Robur ACF 60-00 Installation, Use And Maintenance Manual
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Robur ACF 60-00 Installation, Use And Maintenance Manual

Gas fired absorption chiller for cooling medium-large areas
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Installation, use and
maintenance manual
GA Line ACF 60-00 Model
Gas fired absorption chiller
for cooling medium-large areas
Natural gas/LPG fired

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  • Page 1 Installation, use and maintenance manual GA Line ACF 60-00 Model Gas fired absorption chiller for cooling medium-large areas Natural gas/LPG fired...

  • Page 3: Table Of Contents

    INDEX 1. GENERAL WARNINGS ....................3 2. OVERVIEW AND TECHNICAL DATA ................5 OVERVIEW ......................5 GAS FIRED CHILLER OPERATION CYCLE ............6 TECHNICAL DATA: ACF60-00 (STANDARD, HR, HT, TK, LB VERSIONS) ..8 STANDARD VERSION .................... 8 HT VERSION ......................10 TK VERSION ......................13 ACF60-00 UNIT INTERNAL PRESSURE DROP (Standard, HT, TK versions) ...
  • Page 4 NOTE Carefully read the information contained in this manual. It contains important instructions regarding installation, use and maintenance safety. Save this manual for any future needs. The manufacturer cannot be held responsible for any damages from improper, erroneous or irrational use. With the aim of continuously improving the quality of our products, manufacturer reserves the right to change reported instructions and drawings without any prior notice.

  • Page 5: General Warnings

    1. GENERAL WARNINGS This manual is an integral and essential part of the product and must be given to the owner. Only qualified technicians, strictly complying with the manufacturer’s instructions and the local standards, should install this product. The manufacturer will not accept responsibility for personal injuries or property damage resulting from improper installation.
  • Page 6 If the unit is sold or transferred to another owner, this manual will be provided for use to the new owner and/or installer. Under no circumstances should the unit be operated with any safety or electrical component by- passed or defective. Do not use this appliance if any part has been under water.

  • Page 7: Overview And Technical Data

    2. OVERVIEW AND TECHNICAL DATA OVERVIEW The High Efficiency Chillers ACF60-00 series are water chillers, equipped with an air-cooled condenser and designed for outdoor installation. The absorption cooling cycle is based upon a solution of water and ammonia for the production of chilled water (temperature of chilled water is given by Technical Tables). The chilling system is fed by thermal energy provided by a gas burner, therefore the required electric energy is limited to driving the fan and pump motors (the only mechanical moving components of the unit).

  • Page 8: Gas Fired Chiller Operation Cycle

    Flow Switch monitors the chilled water flow and shuts down the unit when the water flow stops or drops to an insufficient level. GAS FIRED CHILLER OPERATION CYCLE The fluid used in the cooling cycle is a solution of water and ammonia (see Figure 2). Ammonia is the refrigerant and water is the absorbing fluid.
  • Page 9 CONDENSER ABSORBER EVAPORATOR RESTRICTORS TUBE-IN-TUBE REFRIGERANT HEAT EXCHANGER SOLUTION COOLED ABSORBER GENERATOR BURNER Figure 2– ABSORPTION REFRIGERANT CYCLE Installation, Start-Up, Adjustment and Maintenance Manual...

  • Page 10: Technical Data: Acf60-00 (Standard, Hr, Ht, Tk, Lb Versions)

    TECHNICAL DATA: ACF60-00 (STANDARD, HR, HT, TK, LB VERSIONS) STANDARD VERSION UNITS ACF60-00 PERFORMANCE RATINGS Cooling Capacity Nominal Btu/hr 60,500 Gas Input (HHV) Nominal Btu/hr 94,900 °F Maximum Ambient Operating Temperature Minimum °F Nominal 6,000 Condenser Air Flow Minimum 2,000 Inlet (to the unit) Chilled Water °F Maximum...
  • Page 11 All illustrations and specifications contained herein are based on the latest information available at the time of publication approval. Robur reserves the right to make changes at any time without notice, in materials, specifications, and models or to discontinue models.

  • Page 12: Ht Version

    HT VERSION UNITS ACF60-00 HT PERFORMANCE RATINGS Cooling Capacity Nominal Btu/hr 58,400 Gas Input (HHV) Nominal Btu/hr 94,900 °F Maximum Ambient Operating Temperature Minimum °F Nominal 6,000 Condenser Air Flow Minimum 2,000 Inlet (to the unit) Chilled Water °F Maximum Temperature Outlet (to plant) Chilled Water °F...
  • Page 13 All illustrations and specifications contained herein are based on the latest information available at the time of publication approval. Robur reserves the right to make changes at any time without notice, in materials, specifications, and models or to discontinue models.
  • Page 14 COOLING CAPACITY in Btu/hr OUTLET CHILLED WATER (°F) AMBIENT AIR TEMPERATURE (°F) 41.0 44.6 50.0 54.5 57.2 59,637 59,637 59,637 59,637 60,222 32.0 59,637 59,637 59,637 59,637 60,222 35.6 59,637 59,637 59,637 59,637 60,222 39.2 59,637 59,637 59,637 59,637 60,222 42.8 59,637 59,637...

  • Page 15: Tk Version

    TK VERSION UNITS ACF60-00 TK PERFORMANCE RATINGS Cooling Capacity Nominal Btu/hr 60,500 Gas Input (HHV) Nominal Btu/hr 94,900 °F Maximum Ambient Operating Temperature Minimum °F 10.4 Nominal 6,000 Condenser Air Flow Minimum 2,000 Inlet (to the unit) Chilled Water °F Maximum Temperature Outlet (to plant) Chilled Water...
  • Page 16 All illustrations and specifications contained herein are based on the latest information available at the time of publication approval. Robur reserves the right to make changes at any time without notice, in materials, specifications, and models or to discontinue models.

  • Page 17: Acf60-00 Unit Internal Pressure Drop (Standard, Ht, Tk Versions)

    ACF60-00 UNIT INTERNAL PRESSURE DROP (Standard, HT, TK versions) 12.00 ACF60-00, HT, TK 10.00 8.00 6.00 4.00 2.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 WATER FLOW (GPM) Graph 1- UNIT PRESSURE DROP AS A FUNCTION OF WATER FLOW, OUTLET WATER TEMPERATURE 44.6 °F Installation, Start-Up, Adjustment and Maintenance Manual...

  • Page 18: Lb Versions

    LB VERSIONS UNITS ACF60-00 LB PERFORMANCE RATINGS Cooling Capacity Nominal Btu/hr 45,400 Gas Input (HHV) Nominal Btu/hr 94,900 °F Maximum Ambient Operating Temperature Minimum °F 10.4 Nominal 6,000 Condenser Air Flow Minimum 2,000 Inlet (to the unit) Chilled Water °F Maximum Temperature Outlet (to plant) Chilled Water...
  • Page 19 All illustrations and specifications contained herein are based on the latest information available at the time of publication approval. Robur reserves the right to make changes at any time without notice, in materials, specifications, and models or to discontinue models.
  • Page 20 COOLING CAPACITY in Btu/hr OUTLET CHILLED WATER (°F) AMBIENT AIR TEMPERATURE (°F) 14.0 19.4 23.0 28.4 32.0 52,007 52,217 52,426 52,801 53,176 23.0 52,007 52,217 52,426 52,801 53,176 24.8 52,007 52,217 52,426 52,801 53,176 26.6 52,007 52,217 52,426 52,801 53,176 28.4 52,007 52,217...
  • Page 21 OUTLET CHILLED WATER (°F) AMBIENT AIR TEMPERATURE (°F) 14.0 19.4 23.0 28.4 32.0 47,771 49,117 50,464 51,551 52,637 78.8 47,143 48,622 50,101 51,267 52,432 80.6 46,458 48,076 49,694 50,941 52,188 82.4 45,713 47,476 49,240 50,571 51,901 84.2 44,905 46,822 48,738 50,155 51,571 86.0...

  • Page 22: Acf60-00 Lb Unit Internal Pressure Drop

    ACF60-00 LB UNIT INTERNAL PRESSURE DROP 18.00 16.00 ACF60-00 LB 14.00 12.00 10.00 8.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 MONOETHYLENE GLYCOL (40%) - WATER FLOW (GPM) Graph 2 - ACF60-00 LB PRESSURE DROP Installation, Start-Up, Adjustment and Maintenance Manual...

  • Page 23: Hr Version

    HR VERSION UNITS PERFORMANCE RATINGS ACF60-00 HR Cooling Capacity Nominal Btu/hr 60,500 Air conditioning only (no recovery) Cooling Capacity Nominal Btu/hr 61,240 Air conditioning + recovery Heat Capacity Btu/hr 86,400 Gas Input (HHV) Nominal Btu/hr 94,900 °F Maximum Ambient Operating Temperature Minimum °F Nominal...
  • Page 24 All illustrations and specifications contained herein are based on the latest information available at the time of publication approval. Robur reserves the right to make changes at any time without notice, in materials, specifications, and models or to discontinue models.
  • Page 25 ACF60-00 HR – COOLING CAPACITY CORRECTION FACTORS [Btu/hr] OPERATIONAL MODE: AIR CONDITIONING ONLY EXTERNAL AIR WATER DELIVERY TEMPERATURE °F TEMPERATURE °F 37.4 44.6 48.2 0.98 0.99 1.01 1.03 0.98 0.99 1.01 1.03 0.98 0.99 1.01 1.03 0.98 0.99 1.01 1.03 0.98 0.99 1.01...
  • Page 26 ACF60-00 HR – HEATING CAPACITY OF THE HEAT RECOVERY UNIT [Btu/hr] (output AT THE HEAT RECOVERY UNIT variable) HEAT CAPACITY Btu/hr (Output = 2.2 GPM) RECOVERY EXTERNAL AIR TEMPERATURE SYSTEM HOT °F WATER RETURN TEMPERATURE °F 92,210 92,893 93,576 93,917 95,283 96,308 97,333...
  • Page 27 HEAT CAPACITY Btu/hr (Output = 6.6 GPM) RECOVERY EXTERNAL AIR TEMPERATURE SYSTEM HOT °F WATER RETURN TEMPERATURE °F 96,991 102,455 109,286 — — — — 75,134 81,964 88,795 93,269 100,406 105,871 110,993 50,886 60,107 66,596 72,368 80,257 87,429 93,917 30,224 38,592 44,295 50,203...

  • Page 28: Conditioning Only (No Recovery)

    ACF60-00 HR UNIT INTERNAL PRESSURE DROP OPERATION FOR AIR CONDITIONING ONLY (NO RECOVERY) ACF-HR (operation for AIR CONDITIONING ONLY (no recovery) 12.00 ACF60-00 10.00 8.00 6.00 4.00 2.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 WATER FLOW (GPM) Graph 3- UNIT PRESSURE DROP AS A FUNCTION OF WATER FLOW, OUTLET WATER TEMPERATURE 44.6 °F ACF60-00 HR HEAT RECOVERY UNIT INTERNAL PRESSURE DROP...

  • Page 29: Dimensions

    DIMENSIONS Service Panel ” ” ” ” 1.230 FRONT VIEW RIGHT SIDE VIEW Figure 3 - ACF60-00, HT, TK, LB, HR DIMENSIONS. Installation, Start-Up, Adjustment and Maintenance Manual...

  • Page 30: Installation

    3. INSTALLATION 3.1 GENERAL RULES Only qualified technicians, in compliance with the manufacturer’s instructions, should carry out the installation and maintenance of the ACF60-00 unit. The installation of the appliance must conform to the requirements of the authority having jurisdiction or in the absence of such requirements, to the latest edition of the National Fuel Gas Code, ANSI Z223.1.

  • Page 31: Installation Of The Unit

    3.2 INSTALLATION OF THE UNIT HANDLING OF THE UNIT ON SITE When arriving at the installation site, visually inspect the unit for any signs of damage to the package, which may indicate possible unit damage. Once on site, the units must remain in the factory packaging and only be unpacked at the moment before installation.
  • Page 32 18” 18” 18” 18” 18” SINGLE UNIT MULTIPLE UNITS Figure 5 – CLEARANCES FOR CORRECT INSTALLATION OF THE UNIT There MUST NOT be any obstructions or structural overhangs (roof edges, balconies) over the top of the unit. The re-circulation of the air discharged from the condenser results in a poor unit performance. When the unit is installed in close proximity to buildings, keep the unit away from the roof edge drip line.
  • Page 33 GROUND INSTALLATION Ground level units should be supported on a LEVEL concrete pad with a minimum thickness of 4" and slightly larger than the unit base (see Figure 7 for typical slab dimensions). Local soil conditions will actually dictate the slab thickness required to prevent shifting. Do not allow the concrete slab touch the foundation of a structure.
  • Page 34 FRONT VIEW SIDE VIEW Figure 8 – HANDLING OF THE ACF60-00 UNIT Although approved for installation on a combustible base, the unit must not be installed directly on the roof surface. Use base supports for the installation (see Figure 7). Both the unit and the supporting base weight should be sufficiently supported by the roof joists.

  • Page 35: Hydronic And Gas Installation

    4. HYDRONIC AND GAS INSTALLATION 4.1 WATER PIPING DESIGN AND INSTALLATION Piping for the chiller is to be designed and installed as a closed hydronic circuit. The following items (not supplied) must be installed close to the unit (see Figure 9): FLEXIBLE CONNECTIONS to avoid vibration transmission to the chiller water lines.
  • Page 36 ® WATER OUTLET FLEXIBLE JOINTS EXPANSION COLD-WATER STORAGE VESSEL ® WATER OUTLET WATER CIRCULATION PRIMARY AND PUMP SECONDARY COLD- WATER STORAGE Figure 9 – EXAMPLE OF HYDRONIC SYSTEMS WITH SINGLE COLD-WATER STORAGE (TOP) and PRIMARY- SECONDARY WATER STORAGE (BOTTOM) When rigid pipes are used, it is recommended to use flexible connections between the unit and piping to avoid vibration transmission.
  • Page 37 ® WATER OUT UNIT ACF 60-00 LEGEND: FLEXIBLE CONNECTIONS ON / OFF VALVE MANOMETERS WATER PUMP WATER FILTER EXPANSION TANK WATER FLOW RATE VALVE COLD WATER STORAGE DDC (OPTIONAL) NOTE: ANTIFREEZE GLYCOL MUST BE ADDED INTO THE CHILLED WATER OR EMPTY OUT THE UNIT FROM WATER DURING WINTER: SEE Table 18, page 40 Figure 10 –...
  • Page 38 ∅ 1” 1/4 FPT W WATER CONNECTIONS FRONT ∅ 7/8 ELECTRICAL KNOCKOUTS 4 – ¼” 2– 7/8” Figure 12 – ACF 60-00, TK, HT, LB - SERVICE PLATE DIMENSIONS ” CONNECTIONS PANEL ACF-HR ” ∅ ½” FPT ” G - GAS SUPPLY Chiller –...

  • Page 39: Gas Supply Piping

    4.2 GAS SUPPLY PIPING All gas piping must conform to the latest edition of National Fuel Gas Code ANSI Z223.1 and all local gas piping codes. In Canada, the gas piping must conform to the CGA Standard CAN1 B149.1 and .2, "Installation Code for Gas Burning Appliances &...

  • Page 40: Electrical Connection

    5. ELECTRICAL CONNECTION WARNING IN THE FOLLOWING SECTION PLEASE REFER TO "L" AS "L1" AND TO "N" AS "L2". 5.1 POWER SUPPLY AND PUMP WIRING FOR A SINGLE ACF60-00 UNIT All wiring should be installed in accordance with the latest edition of the National Electrical Codes, ANSI/NFPA No.
  • Page 41 WARNING If power for the water pump is taken from the high voltage terminal block located in the electrical control box, as shown in Figure 15, the minimum circuit ampacity for the unit must be increased above that listed in the TECHNICAL DATA sheet in SECTION 2 to accommodate the additional current draw of the water pump installed.

  • Page 42: Power Supply And Pump Wiring For 2 Or More Acf60-00 Units

    5.2 POWER SUPPLY AND PUMP WIRING FOR 2 OR MORE ACF60-00 UNITS The figure shows typical wiring for 2 or more ACF60-00 units. The transformer is required to feed N.O. contacts with low voltage current; this is done for safety reasons: when doing maintenance and a unit is shut off, these contracts could still remain fed.

  • Page 43: Control Switch Wiring And Thermostat Location

    5.3 CONTROL SWITCH WIRING AND THERMOSTAT LOCATION CONSENT SWITCH WIRING If DDC is not used, a consent switch that provides an ON/OFF function is to be connected to the R and Y on the S61 board. This wiring will carry 24-volt current and it is recommended to use a cable with the correct number of color-coded 18 AWG wires.

  • Page 44: Acf60-00 Wiring

    221°F wire, except ground, high temperature and pressure switch wires 392°F or equivalent. Igniter and flame sensor wire have to be replaced with Robur spare parts. See, SPARE PARTS, page 60. Label all wires prior to disconnection when servicing the controls. Wiring errors can cause improper and dangerous operation.

  • Page 45: Ddc Connection

    5.5 DDC CONNECTION Connection with ACF60-00 UNIT WARNING For the connection of DDC (available as accessory) with ACF60-00 units, consult the instructions, figures and diagrams only contained in this subparagraph. For further details and/or information refer to the specific “DDC installation, programming and use manual”.
  • Page 46 CABLE TYPE AND MAX DISTANCE COVERED COLOR AND SIGNAL MODEL BLACK = H WHITE = L BROWN = GND 1475 ROBUR NETBUS Honeywell SDS 1620 BELDEN 3086A BLACK = H WHITE = L BROWN = GND 1475 TURCK type 530...
  • Page 47 • CAN-BUS wire connection to Electronic Control board LEGEND NB: Situation with only one CAN-BUS wire (The figure at left, is an example of terminal node connection to electronic control board). Isolated adhesive tape CAN-BUS wire shield Fixing clamp (1 CAN-BUS wire is fixed) Connector for CAN-BUS wire conductors (to be removed to ease the conductors connection) Internal conductors (n.
  • Page 48 To position the jumpers on the board according to the type of node being configured: You will need: access to the electronic board. If the appliance is a terminal node on the network (i.e. 3 wires are inserted in the orange connector on the board): set the jumpers as shown in detail A of Figure 23.
  • Page 49 • CAN-BUS wire connection to Digital Display Control (DDC) WARNING Like the orange connector of the electronic control board, the DDC connector, too, has two different situations of connection (see Figure 26, Figure 27 page 48). The Jumpers (J21) are closed in the factory as in 1st CASE. 1.
  • Page 50 EXAMPLE OF CLOSED JUMPERS (Terminal node with N. 1 CAN-BUS wire) GND common cable LOW parameters signals High parameters signals CAN PORT / CONNECTOR jumpers (closed position) conductors CAN-BUS Wire Figure 26 – DETAILED EXAMPLE OF ONE CAN-BUS WIRE CONNECTION TO DDC EXAMPLE OF OPENED JUMPERS (Intermediate node with N.
  • Page 51 LEGEND DIRECT DIGTAL CONTROLLER FOR AYF (SUPPLIED AS ACCESSORY) SAFETY TRANSORMER 230/24 Vac – 60 Hz (> 20 VA, not supplied) GND/L/H SIGNAL PARAMETERS (COMMON/HIGH/LOW) (OF CONNECTOR P8) JUMPERS FOR CAN-BUS ON DDC JUMPER for CAN-BUS on ECB S61 Figure 28 – CONNECTION OF DDC TO N. 1 ACF60-00. Installation, Start-Up, Adjustment and Maintenance Manual...
  • Page 52 LEGEND DIRECT DIGTAL CONTROLLER FOR AYF (SUPPLIED AS ACCESSORY) SAFETY TRANSORMER 230/24 Vac – 60 Hz (> 20 VA, not supplied) GND/L/H SIGNAL PARAMETERS (COMMON/HIGH/LOW) (OF CONNECTOR P8) JUMPERS FOR CAN-BUS ON DDC JUMPER for CAN-BUS on ECB S61 CONNECTION OF DDC TO N. 2 ACF60-00. Figure 29 –...

  • Page 53: Start-Up And Adjustment

    Unit damaged or defective due to transport and/or installation ANOMALOUS INSTALLATION CONDITIONS FOR THE UNIT AND/OR PERSONS The authorized Robur service (TAC) can carry out the 1st start-up, but the unit will be kept switched off until the user/installer fully follows the manufacturer’s directions/instructions. Anomalous installation...
  • Page 54 1. Open air bleed(s) located at the highest point in the system. Connect a hose between the charging pump and Valve A. Connect a hose to Valve C and place the other end of this hose into the mixing container (See Figure 21). 2.
  • Page 55 Please make sure the pipes are properly rinsed in order to remove any residue of chemical substances from the pipes. Robur is not liable for ensuring that water quality is always compliant with what reported in Table 19 is not’s. Non-compliance with indications above may jeopardize the proper operation, integrity and reliability of Robur appliances, invalidating the warranty.

  • Page 56: Gas Pressure Adjustement

    6.2 GAS PRESSURE ADJUSTEMENT The manufacturer supplies the units already adjusted for a particular type of gas. The type of gas can be checked and easily identified by looking at the marking label inside the unit. Nevertheless, before starting the unit it is necessary to check and adjust if necessary the Gas Input (HHV) to the burner.
  • Page 57 6. If necessary change the manifold pressure using the gas valve regulator. The regulator is built into the gas valve. Remove the seal screw and turn adjusting screw clockwise to increase pressure or counter clockwise to reduce pressure. Replace seal screw after adjustment. 7.

  • Page 58: Chilled Water Temperature Regulation

    6.3 CHILLED WATER TEMPERATURE REGULATION When DDC is used, the following menu3 set-up is not to be done. It’s necessary to consult “Installation and Programming manual of DDC - Direct Digital Controller”. If the unit isn’t connected to a DDC, chilled water temperature regulation can be set up from menu 3 of the S61 card (see APPENDIX: S61 electronic card).

  • Page 59: Servicing And Maintenance

    7. SERVICING AND MAINTENANCE This manual is an integral and essential part of the product and must be given to the owner. Performing correct preventive service and maintenance will help to guarantee long life of the unit with high efficiency and low maintenance costs. WARNING ONLY Authorized Technicians (TAC) strictly complying with the manufacturer’s instructions and the local standards should perform maintenance and service on the UNIT internal components.
  • Page 60 CONDENSER / ABSORBER COILS Figure 32 – FINNED CONDENSER / ABSORBER WARNING ALWAYS wear safety goggles! BURNER CONTROL Gas burners do not normally require scheduled servicing; however, deterioration or an accumulation of lint may cause yellowing flame or delayed ignition. Either condition indicates that a service call is required. CHECK CONDENSER FAN HEIGHT For proper air flow, the distance between the top edge of the fan blade and the top panel must be 1”1/4.

  • Page 61: Adapting To Another Gas

    8. ADAPTING TO ANOTHER GAS NOTE ONLY an Authorized Technician can perform the operation described in this section If the type of gas indicated does not correspond to the type to be used (natural or propane gas) by unit, it must be converted and adapted to the type of gas to be used. The gas orifice (nozzle) must be changed and the gas valve must be converted.

  • Page 62: Spare Parts

    Below are the lists of the spare parts for ACF60-00 appliance. Each list comes after the respective exploded drawing, which pictures each part in the list with its progressive number. Spare parts can be ordered from Robur Corporation. Exploded drawing n.1: INSULATING, WATER PIPES AND ACCESSORIES EXPLODED DRAWING N.1 –...
  • Page 63 Rif. Codice Descrizione Q.tà J-TBO358 PUMP HIGH PRESSURE PIPE N-RND016 D.3/8"x1,5 COPPER WASHER N-BLL000 PUMP GAS SCREW 3/8” J-FLS009 WATER FLOWSWICH FOR S61 C-CBN091 ABSORBER FRONT-SIDE INSULATING C-CBN092 ABSORBER REAR-SIDE INSULATING R-TBO418 WATER DELIVERY PIPE R-TBO420 WATER RETURN PIPE K-MNM002 DIFFERENTIAL MANOMETER KIT J-TRS007 IGNITER TRANSFORMER...
  • Page 64 Exploded drawing n.2: ELECTRICAL BOX AND PUMP EXPLODED DRAWING N.2 – SEE Table 24, PAGE 63 FOR THE RELATIVE PARTS LIST. Figure 36 – Installation, Start-Up, Adjustment and Maintenance Manual...
  • Page 65 Rif. Codice Descrizione Q.tà R-PMP009 60 Hz OIL PUMP J-NTV000/B MX20/15 VIBRATION DAMPING J-CRT003 PUMP CARTER L-BQD018 ELECTRIC PANEL BASE E-TRS013 60 Hz 208-240/24V/40VA ELECTRICAL TRANSFORMER L-STF149 GROUND CONNECTION BRACKET E-CNT031 24 Vac, 60Hz, MICROPROCESSOR BASED HSI CONTROL J-TLT020 COMBUSTION CHAMBER THERMOSTAT E-SLT040 S61CF24 ELECTRICAL BOARD E-CND011...
  • Page 66 Exploded drawing n.3: COMBUSTION CHAMBER AND GAS SYSTEM EXPLODED DRAWING N.3 – SEE Table 25, PAGE 65 FOR THE RELATIVE PARTS LIST. Figure 37 – Installation, Start-Up, Adjustment and Maintenance Manual...
  • Page 67 Rif. Codice Descrizione Q.tà J-CCM026 FRONT COMBUSTION CHAMBER ASSY S-CMR000 REAR COMBUSTION CHAMBER ASSY H-CMR002 COMB. CHAMBER INTERNAL CONVEYOR L-STF120 RETAINER BURNER L-MFS000 BURNER TUBE CLIP C-CBN040 FRONT BOTTOM INSULATION C-CBN038 REAR UPPER INSULATION C-CBN037 FRONT-TOP INSULATION C-CBN042 COMBUST. CHAMBER BASE INSULATION C-CBN080 RIGHT COMBUST.
  • Page 68 Exploded drawing n.4: PANELS KIT EXPLODED DRAWING N.4 – SEE , PAGE 67 FOR THE RELATIVE PARTS LIST. Figure 38 – Table 26 Installation, Start-Up, Adjustment and Maintenance Manual...
  • Page 69 Rif. Codice Descrizione Q.tà P-MNS035 PAINTED FRONT-LEFT COLUMN P-MDS004 PAINTED BACK RIGHT-LEFT COLUMN P-MND020 PAINTED FRONT-RIGHT COLUMN P-PNF063 COMPLETE PAINTED FRONT PANEL C-12100960 INSPECTION HOLE GLASS L-PST068 SILK SCREENED SERVICE PLATE N-MNG000 PANELS HANDLE E-MTR056 60 Hz FAN MOTOR V-PRT000 60 Hz MOTOR RAIN SHIELD L-STF210 60 Hz FAN MOTOR BRACKET...

  • Page 70: Appendix

    10. APPENDIX ELECTRONIC SYSTEM OF THE ACF60-00 UNIT The electronic control board of the unit is placed inside the electrical box and is equipped with a 4 digits display, a regulating knob (encoder) and a terminal set (CAN PORT) for the remote connection. The DISPLAY (particular A) shows the operation data (example: chilled water temperature) and possible anomalies, through the visualization of the unit codes.
  • Page 71 Operation Management And Control The Display of the electronic control board, during the normal operation, shows in alternative mode the following information: Water inlet temperature (after the symbol Water outlet temperature (after the symbol Temperature difference ∆T (after the symbol If anomalies are found, the electronic control board will show them on the display and will visualize the relative flashing unit codes.
  • Page 72 (if allowed) modify the value of parameters; an example are cold water set point and the water temperature difference setup. MENU 4, 5 e 6 are only to be managed by Robur Technical Assistance authorized Centers (TAC). NOTE The electronic control board has three fuses for circuit protection.
  • Page 73 Next, the ignition control box energizes an ignition transformer that generates a high intensity spark at the igniter to ignite the gas/air mixture. Simultaneously, the gas valve is energized, allowing the flow of gas to the burner. The ignition control box continuously monitors the flame sensor 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.

  • Page 74: Table Of Operating Codes Generated By Electronic Board (Firmware Version 3.027)

    4 is generated twice in 2 hours of operation. RESET METHOD: Carry out appropriate checks. Reset may be performed via DDC (or via S61 board, menu 2, menu item 1). If the code persists, contact ROBUR TAC. HIGH AMBIENT TEMPERATURE CODE GENERATED BY: HIGH temperature detected by ambient temperature sensor.
  • Page 75 RESET METHOD: Carry out appropriate checks. Reset may be performed via DDC (or S61 board via menu 2, parameter 1). If the code persists, contact ROBUR TAC. COLD WATER FLOW SWITCH: insufficient chilled water flow CODE GENERATED BY: Insufficient cold water flow rate (circulator on and flow switch open).
  • Page 76 29 is active for more than 10 minutes (with central flame control unit on). RESET METHOD: Carry out appropriate checks. Reset may be performed via DDC (or S61 board via menu 2, parameter 1). If the code persists, contact ROBUR TAC. WATER TEMPERATURE TOO LOW CODE GENERATED BY: The warning appears when the water temperature is lower than the operational limits (cooling).
  • Page 77 RESET METHOD: Check 24-0-24 Vac fuses and electrical power connections on the board. Reset may be carried out via DDC (or via S61 board via menu 2, menu item 1). If the code persists or occurs again, contact ROBUR TAC.
  • Page 78 The module type set (from menu 6) does not correspond to the one managed by the board. RESET METHOD: Reset occurs automatically when the correct parameters are entered. If the code persists, contact ROBUR TAC. E 86 - E 87 - E 88 - E 89 MEMORY TEST UNSUCCESSFUL CODE GENERATED BY: Processor error.
  • Page 80 Robur is dedicated to dynamic progression in research, devepment and promotion of safe, environmentally-friendly, energy-efficiency products, through the commitment and caring of its employees and partners Robur Mission Robur Corporation advanced heating and cooling technologies 827 E. Franklin Street Evansville, Indiana 47711 USA P (812) 424 1800 F (812) 422 511 7 www.robur.com/us...

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