Wiring Diagrams DIAGRAM INDEX

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1 30HK ;30HL050,060;30HW Reciprocating Liquid Chillers with ComfortLink Controls 50/60 Hz Wiring Diagrams DIAGRAM INDEX UNIT 30 VOLTAGE DIAGRAM TYPE FIGURE LABEL DIAGRAM All Component Arrangement 1 30HK All Low Voltage (24-V) Control Schematic 2 30HK HK,HL All 115-V Control Schematic 3 30HK All Power Schematic 4 30HK All Field Wiring Diagram 5 30HK All Component Arrangement 6 30HW All Low Voltage (24-V) Control Schematic 7 30HW HWA/B,C/S All Power Schematic 8 30HW All 115-V Control Schematic 9 30HW All Field Wiring Diagram 10 30HW SAFETY CONSIDERATIONS Installing, starting up, and servicing this equipment can be hazardous due to system pressures, electrical components, and equipment location. Only trained, qualified installers and service mechanics should install, start up, and service this equipment. Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should be performed by trained service personnel. When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment. Follow all safety codes. Wear safety glasses and work gloves. Use care in handling, rigging, and setting bulky equipment. ELECTRIC SHOCK HAZARD. Open all remote disconnects before servicing this equipment. Use only designated overload protection. SEQUENCE OF OPERATION Start-Up When the unit Enable/Off/Remote switch is set to the ENABLE position, the 24-v control circuit will be energized. When there is a call for cooling and all safety devices are satisfied, the compressor will start unloaded after a delay of 1 to 3 minutes. The low pressure and oil pressure safety switches (if so equipped) will be bypassed for a 2-minute period after the compressor has been started. Capacity Control The 30HW018 and units have 3 standard stages of capacity control, the 30HW025 units have 2 standard stages of capacity control, and the 30HK,HL units have 4 standard stages of capacity control. The standard capacity staging is provided by electrically actuated suction cut-off unloaders. One additional stage of capacity control can be provided by the optional hot gas bypass. When the leaving fluid temperature rises above the set point, the control will begin to add stages of capacity by starting a compressor. The control uses a leaving-water temperature control with entering water compensation routine and will add additional stages of capacity as required to meet the required load. If the unit is equipped with hot gas bypass, the hot gas bypass solenoid and compressor unloader for the circuit will be energized as the first stage of capacity. When the leaving-fluid temperature starts falling below the set point, the control will remove stages of capacity to match the decrease in building load. Automatic Lead/Lag Control (30HK,HL) This standard feature will automatically balance the wear factors (combination of compressor starts and run hours) of each compressor. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 2 PC 903 Catalog No Printed in U.S.A. Form 30H-3W Pg Replaces: New Tab 5c

2 Capacity-Control Steps Refer to the Capacity- Control Steps Tables 1 and 2 below for capacity control steps for standard units. NOTE: If the optional factory-installed hot gas bypass is used, there will be one more stage of unloading added and the units will be able to operate down to 10% of full load capacity. Table 1 Capacity-Control Steps 30HW UNIT 30HW CONTROL STEPS % CAPACITY OPERATING CYCLES UNIT 30 HK040 HK,HL050 HK,HL060 LEGEND Disp. Displacement Table 2 Capacity-Control Steps 30HK,HL SEQUENCE A SEQUENCE B CONTROL Operating Cylinders Operating Cylinders STEPS % Disp. % Disp. Total Ckt 1 Ckt 2 Total Ckt 1 Ckt NOTES: 1. All compressors are designated from left to right when viewed from front of unit. Circuits are also designated form left to right. 2. If accessory hot gas bypass is installed, the hot gas bypass valve will be opened (energized) only on control step no. 1. 2

3 NOTES: 1. Factory wiring is in accordance with the National Electrical Codes. Any field modifications or additions must be in compliance with all applicable codes. 2. Use 75 C min wire for field power supply. 3. All circuit breakers Must Trip Amps are equal to or less than 156% FLA. 4. Oil pressure safety switches are standard on 30HL units only. 5. All field interlock contacts must have a minimum rating of 2 amps at 24 vac sealed. See field interlock wiring. 6. Compressors thermally protected three phase motors protected against primary single phase conditions. 7. Terminals 9 and 10 of TB5 are for field connection of remote On-Off. The contacts must be rated for dry circuit application capable of handling a 5 vdc 1 ma to 20 ma load. LEGEND A Alarm C Contactor, Compressor CB Circuit Breaker CH Crankcase Heater CR Control Relay CWFS Chilled Water Flow Switch CWP Chilled Water Pump Interlock DLS Demand Limit Switch EMM Energy Management FU Control Transformer Fuse GCS Ground Current Sensing GND Ground HGS Hot Gas Solenoid HPS High-Pressure Switch LPS Low-Pressure Switch MBB Main Base Board OPS Oil Pressure Switch PL Plug POT Potentiometer R Relay (Condenser) SW Switch T Thermistor TB Terminal Block TRAN Transformer UL Unloader Terminal Block Factory Wiring Field Wiring Accessory or Option Wiring Fig. 1 Component Arrangement; 30HK,HL

4 LEGEND FOR FIG. 2-4 A ALM C CB CFR CH CNP COMP CR CWFS CWP CWPI EMM FU GCS GND HPS LLSV LPS OAT OPS PL POT R SPT SW T TB TDR TRAN UL LEGEND Alarm Alarm Contactor, Compressor Circuit Breaker Condenser Fan Relay Crankcase Heater Condenser Pump Compressor Control Relay Chilled Water Flow Switch Chilled Water Pump Chilled Water Pump Interlock Energy Management Control Transformer Fuse Ground Current Sensing Ground High-Pressure Switch Liquid Line Solenoid Valve Low-Pressure Switch Outdoor-Air Temperature Oil Pressure Switch Plug Potentiometer Relay (Condenser) Space Temperature Switch Thermistor Terminal Block Time-Delay Relay Transformer Unloader Terminal Block Terminal (Unmarked) Terminal (Marked) Splice Factory Wiring Field Wiring Accessory or Option Wiring To indicate common potential only. Not to represent wiring. 4

5 NOTES: 1. Factory wiring is in accordance with the National Electrical Codes. Any field modifications or additions must be in compliance with all applicable codes. 2. Use 75 C min wire for field power supply. 3. All circuit breakers Must Trip Amps are equal to or less than 156% FLA. 4. Oil pressure safety switches are standard on 30HL units only. 5. All field interlock contacts must have a minimum rating of 2 amps at 24 vac sealed. See field interlock wiring. 6. Compressors thermally protected three phase motors protected against primary single phase conditions. 7. Terminals 9 and 10 of TB5 are for field connection of remote On-Off. The contacts must be rated for dry circuit application capable of handling a 5 vdc 1 ma to 20 ma load. Fig. 2 Low-Voltage Control Schematic; 30HK,HL

6 Fig V Control Schematic; 30HK,HL

7 7 Fig. 4 Power Schematic; 30HK,HL

8 NOTES: 1. Factory wiring is in accordance with the National Electrical Code (NEC). Field modifications or additions must be in compliance with all applicable codes. 2. Wiring for main field power supply must be rated 75 C minimum. Use copper, copper clad aluminum or aluminum conductors for all units. 3. Control power is factory supplied. TRAN3 primary voltage is 230 v for 208/ and 380/ units. TRAN3 primary voltage is 460 v for and 575 v for TRAN3 secondary voltage is 115 v for all units. 4. Terminals 9 and 10 of TB5 are for field connection for remote on-off control. The contacts must be rated for dry circuit application capable of reliably switching a 5 vdc,.5ma load. 5. The maximum load allowed for the remote alarm relay circuit is 15 va sealed, 30 va inrush at 24 volt. 6. The maximum load allowed for the condenser fan, condenser pump or cooler pump relays is 15 va sealed, 30 va inrush each at 115 volt. 7. For GCS accessory, remove jumper wire from TB2, terminals 5/8 for compressor A1 and from terminals 6/10 for compressor B1. LEGEND A Alarm CFR Condenser Fan Relay CNFS Condenser Flow Switch CNP Condenser Pump CNPI Condenser Pump Interlock CWFS Chilled Water Flow Switch CWP Chilled Water Pump CWPI Chilled Water Pump Interlock GCS Ground Current Sensing HGBP Hot Gas Bypass LWT Leaving Water Temperature TB Terminal Block TRAN Transformer Field Power Wiring Field Control Wiring Factory-Installed Wiring Field-Installed Device Fig. 5 Field Wiring Diagram; 30HK,HL

9 NOTES: 1. Factory wiring is in accordance with the National Electrical Codes. Any field modifications or additions must be in compliance with all applicable codes. 2. Use 75 C min wire for field power supply. 3. All circuit breakers Must Trip Amps are equal to or less than 156% FLA. 4. Oil pressure safety switches are standard on 30HWA units only. 5. All field interlock contacts must have a minimum rating of 2 amps at 24 vac sealed. See field interlock wiring. 6. Compressors thermally protected three phase motors protected against primary single phase conditions. 7. Terminals 9 and 10 of TB5 are for field connection of remote On-Off. The contacts must be rated for dry circuit application capable of handling a 5 vdc 1 ma to 20 ma load. LEGEND A Alarm C Contactor, Compressor CB Circuit Breaker CH Crankcase Heater CR Control Relay CWFS Chilled Water Flow Switch CWP Cooler Water Pump DLS Demand Limit Switch EMM Energy Management FU Fuse GCS Ground Current Sensing GND Ground HGBP Hot Gas Bypass HPS High-Pressure Switch LPS Low-Pressure Switch MBB Main Base Board OPS Oil Pressure Switch PL Plug POT Potentiometer SW Switch T Thermistor TB Terminal Block TDR Time Delay Relay TRAN Transformer UL Unloader Terminal Block Factory Wiring Field Wiring Accessory or Option Wiring Fig. 6 Component Arrangement; 30HWA/B,C/S

10 A ALM C CB CFR CH CNP COMP COTP CR CWFS CWP CWPI EMM FIOP FU GCS GND HGBP HPS LPS MBB OAT OPS PL POT R SPT SW T TB TDR TOR TRAN UL LEGEND FOR FIG. 7-9 LEGEND Alarm Alarm Contactor, Compressor Circuit Breaker Condenser Fan Relay Crankcase Heater Condenser Pump Compressor Compressor Overtemperature Protection Control Relay Chilled Water Flow Switch Cooler Water Pump Chilled Water Pump Interlock Energy Management Factory-Installed Option Fuse Ground Current Sensing Ground Hot Gas Bypass High-Pressure Switch Low-Pressure Switch Main Base Board Outdoor-Air Temperature Oil Pressure Switch Plug Potentiometer Relay Space Temperature Switch Thermistor Terminal Block Time-Delay Relay Toroid Transformer Unloader Terminal Block Terminal (Unmarked) Terminal (Marked) Splice Factory Wiring Field Wiring Accessory or Option Wiring To indicate common potential only. Not to represent wiring. 10

11 NOTES: 1. Factory wiring is in accordance with the National Electrical Codes. Any field modifications or additions must be in compliance with all applicable codes. 2. Use 75 C min wire for field power supply. 3. All circuit breakers Must Trip Amps are equal to or less than 156% FLA. 4. Oil pressure safety switches are standard on 30HWA units only. 5. All field interlock contacts must have a minimum rating of 2 amps at 24 vac sealed. See field interlock wiring. 6. Compressors thermally protected three phase motors protected against primary single phasing conditions. 7. Terminals 9 and 10 of TB5 are for field connection of remote On-Off. The contact must be rated for dry circuit application capable of handling a 5 vdc 1 ma to 20 ma load. Fig. 7 Low-Voltage Control Schematic; 30HWA,B,C,S

12 Fig. 8 Power Schematic; 30HWA,B,C,S

13 Fig V Control Schematic; 30HWA,B,C,S

14 NOTES: 1. Factory wiring is in accordance with the National Electrical Code (NEC). Field modifications or additions must be in compliance with all applicable codes. 2. Wiring for main field power supply must be rated 75 C minimum. Use copper, copper clad aluminum or aluminum conductors for all units. 3. Control power is factory supplied. TRAN3 primary voltage is 230 v for 208/ , and 380/ units. TRAN3 primary voltage is 460 v for and 575 v for TRAN3 secondary voltage is 115 v for all units. 4. Terminals 9 and 10 of TB5 are for field connection for remote On-Off control. The contacts must be rated for dry circuit application capable of reliably switching a 5 vdc,.5ma load. 5. The maximum load allowed for the remote alarm relay circuit is 15 va sealed, 30 va inrush at 24 volt. 6. The maximum load allowed for the condenser fan, condenser pump or cooler pump relays is 15 va sealed, 30 va inrush each at 115 volt. 7. For GCS accessory, remove jumper wire from TB2, terminals 5/8 for compressor A1. LEGEND A Alarm CFR Condenser Fan Relay CNFS Condenser Flow Switch CNP Condenser Pump CNPI Condenser Pump Interlock CWFS Chilled Water Flow Switch CWP Chilled Water Pump CWPI Chilled Water Pump Interlock GCS Ground Current Sensing HGBP Hot Gas Bypass LWT Leaving Water Temperature TB Terminal Block TRAN Transformer Field Power Wiring Field Control Wiring Factory-Installed Wiring Field-Installed Device Fig. 10 Field Wiring Diagram; 30HWA,B,C,S

16 Copyright 1999 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 2 PC 903 Catalog No Printed in U.S.A. Form 30H-3W Pg Replaces: New Tab 5c

Wiring Diagrams DIAGRAM INDEX. POWER SCHEMATICS Figure Number. Label Diagram No. 30HX ALL ALL

Wiring Diagrams DIAGRAM INDEX. POWER SCHEMATICS Figure Number. Label Diagram No. 30HX ALL ALL Wiring Diagrams 30HXA, 30HXC Condenserless and Fluid-Cooled Chillers 50/60 Hz DIAGRAM INDEX POWER SCHEMATICS Unit 30HXA,C Voltage Figure Number Label Diagram No. 30HX 076-186 ALL 1 500141 206-271 ALL 2