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30GTN,GTR040-420
30GUN,GUR040-420
Air-Cooled Reciprocating Liquid Chillers
with ComfortLink™ Controls
50/60 Hz
Controls Start-Up, Operation,
Service, and Troubleshooting
SAFETY CONSIDERATIONS
Installing, starting up, and servicing this equipment can be
hazardous due to system pressures, electrical components, and
DO NOT attempt to unbraze factory joints when servicing
equipment location (roof, elevated structures, etc.). Only
this equipment. Compressor oil is flammable and there is
trained, qual
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Page CONTENTS (cont) Safety Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Page COMPRESSOR PROTECTION LEAD/LAG DETERMINATION LOW OIL PRESSURE PROTECTION CAPACITY SEQUENCE DETERMINATION CRANKCASE HEATERS CAPACITY CONTROL OVERRIDES COOLER PROTECTION Head Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Relief Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 COMFORTLINK™ UNITS (With EXV) HIGH-SI
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Table 1A — Unit Sizes and Modular Combinations inputs from compressors A1, A2, B1 and B2, and other status (30GTN,R) switches. See Table 3. The MBB also controls several outputs. Relay outputs controlled by the MBB are shown in Table 4. UNIT NOMINAL SECTION A SECTION B 30GTN,R TONS UNIT 30GTN,R UNIT 30GTN,R Information is transmitted between modules via a 3-wire com- 040 40 — — munication bus or LEN (Local Equipment Network). The 045 45 — — CCN (Carrier Comfort Network) bus is also supported. C
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At each system element, the shields of its communication Control Module Communication bus cables must be tied together. If the communication bus is RED LED — Proper operation of the control boards can be entirely within one building, the resulting continuous shield visually checked by looking at the red status LEDs (light- must be connected to a ground at one point only. If the commu- emitting diodes). When operating correctly, the red status nication bus cable exits from one building and enters
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Table 3 — Status Switches 170,190, PIN 070 130 (50 Hz) 210, 315A, 040-060 (50 Hz) 090-110, 130 270A,290A, STATUS SWITCH CONNECTION (50 Hz) 150, 230A- 390A, 040-070 (60 Hz) 245B-315B (60 Hz) 330A/B, POINT 080, 230B 255A 420A/B 360A/B, 390B Oil Pressure, Ckt B J7-1, 2 (MBB) Not Used* OPSB OPSB OPSB OPSB OPSB OPSB Oil Pressure, Ckt A J7-3, 4 (MBB) Not Used* OPSA OPSA OPSA OPSA OPSA OPSA Remote On/Off TB5-13, 14 Field-Installed Relay Closure Compressor Fault J5-8, 12 (CXB) Not Used Not Used Not Used
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6 Fig. 1 — Typical Control Box (080-110 and Associated Modular Units Shown)
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CCN LEN DATA COMMUNICATION PORT Fig. 2 — 24 V Control Schematic, Unit Sizes 040-070 7
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CCN LEN DATA COMMUNICATION PORT / Fig. 3 — 24 V Control Schematic, Unit Sizes 080-110, 230B-315B Fig. 3 — 24 V Control Schematic, Unit Sizes 080-110, 230B-315B 8
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CCN LEN DATA COMMUNICATION PORT Fig. 4 — 24 V Control Schematic, Unit Sizes 130-210, 230A-315A, 330A/B-420A/B 9
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RED LED - STATUS GREEN LED - YELLOW LED - LEN (LOCAL EQUIPMENT NETWORK) CCN (CARRIER COMFORT NETWORK) INSTANCE JUMPER CEPL130346-01 J1 J2 STATUS J10 LEN J3 J4 CCN J5 J6 J7 J8 J9 Fig. 5 — Main Base Board EMERGENCY ON/OFF SWITCH ENABLE/OFF/REMOTE CONTACT SWITCH GFI-CONVENIENCE OUTLET ACCESSORY ON 208/230V 460 AND 575V ONLY RESET BUTTON (SIZES 130-210 AND ASSOCIATED MODULES ONLY) Fig. 6 — Enable/Off/Remote Contact Switch, Emergency On/Off Switch, and Reset Button Locations 10
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T3, T4 — SATURATED CONDENSING TEMPERATURE OPERATING DATA SENSORS — These 2 thermistors are clamped to the outside Sensors — The electronic control uses 4 to 10 thermistors of a return bend of the condenser coils. to sense temperatures for controlling chiller operation. See T5, T6 — COOLER SUCTION TEMPERATURE SEN- Table 2. These sensors are outlined below. See Fig. 7-10 for SORS — These thermistors are located next to the refrigerant thermistor locations. Thermistors T1-T9 are 5 kΩ at 77 F inlet
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040-070 080-110 AND ASSOCIATED MODULAR UNITS* 130-210 AND ASSOCIATED MODULAR UNITS* *When thermistor is viewed from perspective where the compressor is on the left and the cooler is on the right. Fig. 8 — Thermistor T3 and T4 Locations 12
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LEGEND EXV — Electronic Expansion Valve Fig. 9 — Compressor Thermistor Locations (T7 and T8) Fig. 10 — Typical Thermistor Location (30GTN,R and 30GUN,R 210, 315A, 390A, 420A/B Shown) 13
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T10 — REMOTE SPACE TEMPERATURE SENSOR — 2. Insert and secure the red (+) wire to terminal 5 of the Sensor T10 (part no. HH51BX006) is an accessory sensor that space temperature sensor terminal block. is remotely mounted in the controlled space and used for space 3. Insert and secure the white (ground) wire to terminal 4 of temperature reset. The sensor should be installed as a the space temperature sensor. wall-mounted thermostat would be (in the conditioned space 4. Insert and secure the bla
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of any compressor winding exceeds 2.5 amps. If this occurs, Thermostatic Expansion Valves (TXV) — Model the lead compressor in that circuit is shut down along with oth- 30GTN,R and 30GUN,R 040-110 units are available from the er compressors in that circuit. factory with conventional TXVs with liquid line solenoids. The liquid line solenoid valves are not intended to be a mechanical A high-pressure switch is wired in series between the MBB shut-off. When service is required, use the liquid line
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Electronic Expansion Valve (EXV) (See Fig. 15) — Standard units are equipped with a bottom seal EXV. This device eliminates the use of the liquid line solenoid pumpdown at unit shutdown. An O-ring has been added to bot- tom of orifice assembly to complete a seal in the valve on shut- STEPPER down. This is not a mechanical shut-off. When service is MOTOR (12 VDC) required, use the liquid line service valve to pump down the LEAD SCREW system. High pressure refrigerant enters bottom of valve where
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PWR CEBD430351-0396-01C J1 J2 LEN J4 J3 STATUS J5 J7 J6 TEST 2 GREEN LED - ADDRESS RED LED - STATUS LEN (LOCAL EQUIPMENT NETWORK) DIP SWITCH Fig. 16 — Energy Management Module The capacity control algorithm runs every 30 seconds. The value ranges from –100 to + 100%. If the next stage of capacity algorithm attempts to maintain the leaving chilled water tem- is a compressor, the control starts (stops) a compressor when perature at the control point. Each time it runs, the control reads the ratio
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Table 5A — Part Load Data Percent Displacement, Standard Units LOADING SEQUENCE A LOADING SEQUENCE B UNIT CONTROL 30GTN,R % Displacement % Displacement STEPS Compressors Compressors 30GUN,R (Approx) (Approx) 125 A1* —— 250 A1 —— 040 (60 Hz) 375 A1*, B1 —— 4 100 A1,B1 —— 124 A1* —— 040 (50 Hz) 247 A1 —— 045 (60 Hz) 376 A1*,B1 —— 4 100 A1,B1 —— 131 A1* —— 045 (50 Hz) 244 A1 —— 050 (60 Hz) 387 A1*,B1 —— 4 100 A1,B1 —— 128 A1* —— 050 (50 Hz) 242 A1 —— 060 (60 Hz) 387 A1*,B1 —— 4 100 A1,B1 —— 133 A1*
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Table 5A — Part Load Data Percent Displacement, Standard Units (cont) LOADING SEQUENCE A LOADING SEQUENCE B UNIT CONTROL 30GTN,R % Displacement % Displacement STEPS Compressors Compressors 30GUN,R (Approx) (Approx) 1 13 A1* 13 B1* 220 A1 20 B1 3 26 A1*,B1* 26 A1*,B1* 4 33 A1,B1 33 A1,B1 5 40 A1,B1 40 A1,B1 100, 255B 6 57 A1*,A2,B1* 57 A1*,B1*,B2 270B (50 Hz) 7 63 A1*,A2,B1 63 A1,B1*,B2 8 70 A1,A2,B1 70 A1,B1,B2 9 87 A1*,A2,B1*,B2 87 A1*,A2,B1*,B2 10 93 A1*,A2,B1,B2 93 A1,A2,B1*,B2 11 100 A1,A2,B
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Table 5A — Part Load Data Percent Displacement, Standard Units (cont) LOADING SEQUENCE A LOADING SEQUENCE B UNITT CONTROL 30GTN,R % Displacement % Displacement STEPS Compressors Compressors 30GUN,R (Approx) (Approx) 1 13 A1* 13 B1* 2 20 A1 20 B1 3 26 A1*,B1* 26 A1*,B1* 4 33 A1*,B1 33 A1,B1* 5 40 A1,B1 40 A1,B1 6 46 A1*,A2,B1* 46 A1*,B1*,B2 150, 230A, 245A, 7 53 A1*,A2,B1 53 A1,B1*,B2 255A (50 Hz) 8 60 A1,A2,B1 60 A1,B1,B2 9 66 A1*,A2,B1*,B2 66 A1*,A2,B1*,B2 10 73 A1*,A2,B1,B2 73 A1,A2,B1*,B2 11
