Controls, Start-Up, Operation, Service and ... - Climayoreo

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LEGEND MLV — Minimum Load Valve VAV — Variable Air Volume VFD — Variable Frequency Drive Table 102 — Thermistors and Unit Operation Control Pressure Transducers SENSOR Thermistors DESCRIPTION AND LOCATION PART NO. CCT Cooling Coil Thermistor input. Provided with factory-option hydronic heat. Located on face of the hydronic heating coil. Consists of 4 thermistors wired into a 2x2 array. HH79NZ039 (4) LST Limit Switch Thermistor. Provided with Staged Gas Control option. Located in the heating compartment. HH79NZ034 OAT Outside Air Thermistor. Located in top of the return plenum, attached to roof pole. HH79NZ039 Return Air Thermistor. HH79NZ039 RAT Without Economizer: Located on left side base rail in the return plenum. With Economizer: Located on left side face of return damper section in the return plenum. SAT Supply Air Thermistor. Located in the Supply Fan section, on left side of the fan housing. (May be relocated or replaced when unit is used with CCN Linkage systems; see page 63.) HH79NZ039 LAT 1,2,3 Leaving Air Thermistors, provided with Staged Gas Control option. Shipped in the heating compartment. Installer must pull out and mount in the supply duct. HH79NZ034 (3) Control Pressure Transducers Building Pressure. Provided with Modulating Power Exhaust, High-Capacity Power Exhaust HK05ZG018 BP and Return Fan options. Located in the auxiliary control box (left-hand side of unit near return plenum). DPT-A Discharge Pressure (refrigerant), Circuit A. HK05ZZ001 DPT-B Discharge Pressure (refrigerant), Circuit B. HK05ZZ001 SPT-A Suction Pressure (refrigerant), Circuit A. HK05SZ003 SPT-B Suction Pressure (refrigerant), Circuit B. HK05SZ003 DSP Duct Static Pressure. Provided with VAV models equipped with VFD or Inlet Guide Vane options. Located in the auxiliary control box (right-hand side of unit near return plenum). HK05ZG010 FT_SF Supply Air Cfm (velocity pressure). Provided with factory-option return fan system (sizes 075-100 only). Located in the supply fan compartment, on right side, on vertical post. HK05ZG015 FT_RF Return Air Cfm (velocity pressure). Provided with factory-option return fan system (sizes 075-100 only). Located in auxiliary control box (right-hand side, filter access panel). HK05ZG07 Outside Air CFM Outside Air Cfm Monitor (velocity pressure). Provided with the Outside Air Cfm Control option. 50ZZ400290 (030-070) Control Located in auxiliary control box (right-hand side, filter access panel). 50ZZ400289 (075-100) DTT Digital Scroll Discharge Temperature Thermistor. Provided with digital scroll compressor option. Located on discharge line. HH79EZ003 Circuit A Return Gas Thermistor. Provided with MLV option. Located in suction line well. HH79NZ016 (030-060) RGTA HH79NZ020 (070, 075) HH79NZ014 (090, 100) ECONOMIZER HUMIDITY CHANGEOVER SEN- SORS — The ComfortLink controls support 5 different changeover systems for the economizer. These are: • Outdoor enthalpy switch • Outdoor air dry bulb • Differential dry bulb • Outdoor air enthalpy curves • Differential enthalpy • Custom curves (a combination of an enthalpy/dewpoint curve and a dry bulb curve). The units are equipped as standard with an outdoor air enthalpy control. Outside air and return air dry bulb sensors which support the dry bulb changeover method are also supplied as standard. If the other methods are to be used, then a field-installed humidity sensor must be installed for outdoor air enthalpy and customer curve control and two humidity sensors must be installed for differential enthalpy. Installation holes are pre-drilled and wire harnesses are installed in every unit for connection of the humidity sensors. The ComfortLink controls have the capability to convert the measured humidity and dry bulb temperature into enthalpy. ACCESSORY NAVIGATOR DISPLAY — The accessory handheld Navigator display can be used with the 48/50P Series units. See Fig. 35. The Navigator display operates the same way as the scrolling marquee device. The RXB and EXB boards contain a second LEN port than can be used with the handheld Navigator display. 136 CONTROL MODULE COMMUNICATIONS Red LED — Proper operation of the control boards can be visually checked by looking at the red status LEDs as shown on Fig. 29-33. When operating correctly, the red status LEDs should blink in unison at a rate of once every 2 seconds. If the red LEDs are not blinking in unison, verify that correct power is being supplied to all modules. Also, be sure that the main base board is supplied with the current software and that all boards are configured on. If necessary, reload current software. If the problem still persists, a board may need to be replaced. A board LED that is lit continuously or blinking at a rate of once per second or faster indicates that the board should be replaced. Green LED — The boards also have a green LED, which is the indicator of the operation of the LEN communications, which is used for communications between the boards. On the MBB board the local equipment network (LEN) LED should always be blinking whenever power is on. All other boards have a LEN LED that will blink whenever power is on and there is communication occurring. If LEN LED is not blinking, check LEN connections for potential communication errors (J3 and J4 connectors). A 3-wire sensor bus accomplishes communication between modules. These 3 wires run in parallel from module to module. Yellow LED — The MBB has one yellow LED. The Carrier Comfort Network ® (CCN) LED will blink during times of network communication. The other boards do not have a CCN communications port.
TIME EWT LWT SETP Run Status Service Test Temperatures Pressures Setpoints Inputs Outputs Configuration Time Clock Operating Modes Alarms CARRIER COMFORT NETWORK ® INTERFACE — The 48/50P Series units can be connected to the CCN if desired. See Fig. 36. The communication bus wiring is a shielded, 3-conductor cable with drain wire and is field supplied and installed. See the Installation Instructions for wiring information. The system elements are connected to the communication bus in a daisy chain arrangement. The positive pin of each system element communication connector must be wired to the positive pins of the system elements on either side of it. This is also required for the negative and signal ground pins of each system element. Wiring connections for CCN should be made at the COMM board. See Fig. 20. Consult the CCN Contractor’s Manual for further information. NOTE: Conductors and drain wire must be 20-AWG (American Wire Gage) minimum stranded, tinned copper. Individual conductors must be insulated with PVC, PVC/ nylon, vinyl, Teflon, or polyethylene. An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum operating temperature range of –20 C to 60 C is required. It is important when connecting to a CCN communication bus that a color-coding scheme be used for the entire network to simplify the installation. It is recommended that red be used for the signal positive, black for the signal negative and white for the signal ground. Use a similar scheme for cables containing different colored wires. At each system element, the shields of its communication bus cables must be tied together. If the communication bus is entirely within one building, the resulting continuous shield must be connected to a ground at one point only. If the communication bus cable exits from one building and enters another, the shields must be connected to grounds at the lightning suppressor in each building where the cable enters or exits the building (one point per building only). To connect the unit to the network: 1. Turn off power to the control box. 2. Cut the CCN wire and strip the ends of the red (+), white (ground), and black (–) conductors. (Substitute appropriate colors for different colored cables.) 3. Connect the red wire to (+) terminal on the COMM board, the white wire to COM terminal on the COMM board, and the black wire to the (–) terminal on the COMM board. 4. The RJ14 CCN connector on the COMM board can also be used, but is only intended for temporary connection (for example, a laptop computer running Service Tool). ENTER Co m f o r t Link E S C N A V I G A T O R 1 2 . 5 8 5 4 . 6 F 4 4 .1 F 4 4 . 0 F M O D E Alarm Status Fig. 35 — Accessory Navigator Display 137 5. Restore power to unit. IMPORTANT: A shorted CCN bus cable will prevent some routines from running and may prevent the unit from starting. If abnormal conditions occur, unplug the connector. If conditions return to normal, check the CCN connector and cable. Run new cable if necessary. A short in one section of the bus can cause problems with all system elements on the bus. SERVICE Service Access — All unit components can be reached through clearly labeled hinged access doors. These doors are not equipped with tiebacks, so if heavy duty servicing is needed, either remove them or prop them open to prevent accidental closure. Each door is held closed with 3 latches. The latches are secured to the unit with a single 1/ 4-in. –20 x 1/ 2-in. long bolt. See Fig. 37. To open, loosen the latch bolt using a 7 / 16-in. wrench. Pivot the latch so it is not in contact with the door. Open the door. To shut, reverse the above procedure. NOTE: Disassembly of the top cover may be required under special service circumstances. It is very important that the orientation and position of the top cover be marked on the unit prior to disassembly. This will allow proper replacement of the top cover onto the unit and prevent rainwater from leaking into the unit. IMPORTANT: After servicing is completed, make sure door is closed and relatched properly, and that the latches are tight. Failure to do this can result in water leakage into the indoor-air section of the unit. COMPRESSORS Sizes 030,035 — Access to the compressors is below the unitcontrol box. Sizes 040-060 — Access to the compressors is through the doors on the condenser end of the unit. This door also provides access to the discharge service valves, filter driers, the crankcase heaters, and the high-pressure and low-pressure switches. Circuit A is always the compressor on the left when facing main control box. Sizes 070-100 — Each compressor is readily accessible from sides of unit. LIQUID SERVICE VALVES, SUCTION SERVICE VALVES, AND SIGHT GLASSES Sizes 030-060 — Access to these components is through the access panel on the right side of the unit. See Fig. 38. There is also a Schrader port in each suction line that is accessible through this same panel. Sizes 070-100 — Access to these components is from the side of the unit. SUPPLY-FAN MOTORS, PULLEYS, AND BELTS — Access to these components is through the 2 doors labeled FAN SECTION on each side of the unit. POWER EXHAUST MOTORS, PULLEYS, AND BELTS — Access to these components is through the door below the side economizer hoods on both sides of the unit. See Fig. 39. RETURN AIR FILTERS — Access to these filters is through the door marked FILTER SECTION. UNIT CONTROL BOX — Access to this component is through the doors marked ELECTRICAL SECTION on the condenser end of the unit. GAS HEAT SECTION (48P Only) — Access to the gas heat section is through the door labeled HEAT SECTION on the
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Controls, Start-Up, Operation, Serv
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WARNING What to do if you smell gas
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and the ENTER keys until the desire
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START-UP IMPORTANT: Do not attempt
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Table 4 — Fan Performance — 48P
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AIRFLOW (cfm) Table 10 — Fan Perf
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AIRFLOW (Cfm) LEGEND Table 18 — F
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AIRFLOW (cfm) LEGEND Bhp — Brake
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HIGH-EFFICIENCY MOTORS Nominal Maxi
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2. Under the Setpoints menu, set th
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would use Period 2 and set days Sat
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there is a loss of communication be
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and when ON, the control sets a cap
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System Mode Test — When the syste
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Table 31 — Unit Configuration ITE
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SETTING UP THE SYSTEM Machine Contr
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High SST Alert Delay Time (H.SST)
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Table 36 — Cool/Heat Set Point Of
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Table 38 — Run Status Cool Displa
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To use Demand Limiting, select the
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Size 050, 055, 060 Contactor OFM(s)
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Whenever the outdoor ambient temper
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Demand Level Low Heat Off Offset (L
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Limit Switch Low Temp (SW.L.T) —
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STAGE Table 49 — IGC LED Indicato
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Table 50 — Static Pressure Contro
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Table 53 — Dirty Filter Switch Po
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NOTE: If the user wishes to disable
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the economizer modulates when attem
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P = K * BP.P * (error) I = K * BP.I
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its smoke. Closing the economizer (
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Table 57 — Indoor Air Quality Con
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Table 58 — Humidity Configuration
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The default sensor is the return ai
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TEMPERATURE COMPENSATED START LOGIC
Page 85 and 86: Sensor Trim Configuration — The T
Page 87 and 88: SUPPLY FAN VFD CONFIGURATION — Th
Page 89 and 90: REMOTE SWITCH LOGIC CONFIGURATION (
Page 91 and 92: Alarms and Alarm History for for an
Page 93 and 94: Transducer Troubleshooting — The
Page 95 and 96: Table 75 — 10K Thermistor vs Resi
Page 97 and 98: TEMP RESISTANCE (F) (Ohms) -25 98,0
Page 99 and 100: PRESSURE (PSIG) Table 80 — Suctio
Page 101 and 102: Table 81 — Discharge Pressure Tra
Page 103 and 104: Table 82 — Auto View of Run Statu
Page 105 and 106: Table 84 — Cooling Information Di
Page 107 and 108: equalize compressor oil levels. If
Page 109 and 110: Table 91 — Alert and Alarm Codes
Page 111 and 112: T072 (Evaporator Discharge Reset Se
Page 113 and 114: This alarm will disable mechanical
Page 115 and 116: This is the reverse of the Pressuri
Page 117 and 118: 117 a48-8408 Fig. 19 — Typical Po
Page 119 and 120: OD ENTHALPY SWITCH LOW REMOTE OCCUP
Page 121 and 122: Fig. 23 — Typical Electric Heat U
Page 123 and 124: 123 Fig. 25 — Typical Gas Heat Se
Page 125 and 126: 125 Fig. 27 — Component Arrangeme
Page 127 and 128: ACCSY — Accessory ACC’Y — Acc
Page 129 and 130: Table 93 — Rooftop Control Board
Page 131 and 132: Table 96 — Control Expansion Modu
Page 133 and 134: LEGEND IAQ — Indoor Air Quality V
Page 135: the motor position to be configured
Page 139 and 140: Fig. 37 — Door Latch Fig. 38 —
Page 141 and 142: SUPPLY FAN AND POWER EXHAUST MOTOR
Page 143 and 144: Routine cleaning of coil surfaces i
Page 145 and 146: Saturated Discharge Temperature (de
Page 163 and 164: Gas System Adjustment (48P Only) GA
Page 165 and 166: APPENDIX A — LOCAL DISPLAY TABLES
Page 177 and 178: APPENDIX B — CCN TABLES (cont) ST
Page 179 and 180: APPENDIX B — CCN TABLES (cont) ST
Page 181 and 182: APPENDIX B — CCN TABLES (cont) SE
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APPENDIX B — CCN TABLES (cont) MA
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APPENDIX B — CCN TABLES (cont) MA
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TESTACTC TESTCOOL TESTFANS TESTHEAT
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APPENDIX C — UNIT STAGING TABLES
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* 41 for Supply Fan Motor VFD, 42 f
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Fig. B — VFD Keypad START UP WITH
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Upload All Parameters — To upload
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To replace the main fan for frame s
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ALARM CODE ALARM NAME IN PANEL 2001
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APPENDIX E — MODE SELECTION PROCE
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CONTROLS SET POINT AND CONFIGURATIO
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