Évaluations - 5, GPA: 4.6
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Facilité d'utilisation
2 — Rigging with Spreader Bars (Field Supplied) Table 2 — Temperature Limits for Standard Units TEMPERATURE F C Maximum Ambient Temperature 125 52 Minimum Ambient Temperature 0 –18 Maximum Cooler EWT* 95 35 Maximum Cooler LWT 70 21 Minimum cooler LWT† 38 3.3 LEGEND EWT — Entering Fluid (Water) Temperature LWT — Leaving Fluid (Water) Temperature *For sustained operation, EWT should not exceed 85 F (29.4 C). †Unit requires modification below this temperature. MOUNTING UNIT — When unit is in proper location, use of mounting holes in base rails is recommended for securing unit to supporting structure, or for mounting unit on vibration isolators if required. See Fig. 3-5. Fasteners for mounting unit are field supplied. Be sure unit is level to ensure proper oil return to compressor. Step 2 — Check Compressor Mounting — As shipped, compressor is held down by 4 bolts. After unit is installed, loosen each bolt using nut indicated in Fig. 6 until the flat washer (3/8 in.) can be moved with finger pressure. Step 3 — Cooler Fluid and Drain Piping Connections — When facing the cooler side of the unit, the return water connection is on the left and the leaving water connection is on the right. See Fig. 3-5 and 7. Install a minimum 40-mesh strainer in the cooler fluid inlet line just ahead of and as close as possible to the cooler. Provide a means of venting air from the high point of the field-installed piping. After field piping is complete, freeze-up protection is recommended using inhibited ethylene glycol or other suitable inhibited antifreeze solution and electric heat tapes in area where piping is exposed to low ambient temperatures (34 F [1 C] or below). Heat tapes should possess a rating for area ambients and be covered with a suitable thickness of closed-cell insulation. Route power for heating tapes from a separately- fused disconnect. Identify disconnect as heat tape power source with a warning that power must not be turned off except when unit is being serviced. The cooler drain connection is at the opposite end from the compressor (See Fig. 3-5). Insulate the drain piping (in the same manner as the chilled water piping) for at least one ft (305 mm) from cooler. PREPARATION FOR YEAR-ROUND OPERATION — If unit is on year-round operation, add sufficient inhibited ethylene glycol or other suitable inhibited antifreeze solution to chilled water to prevent freezing under low-ambient operating conditions. Consult local water authority on characteristics of area water and add a recommended inhibitor to the chilled water. PREPARATION FOR WINTER SHUTDOWN — Do not shut off control power disconnect during off-season shutdown. At end of cooling season: 1. Drain water from system. 2. Replace drain plug and put 2 gallons (8 liters) of inhibited ethylene glycol (or other suitable inhibited antifreeze) in cooler to prevent freezing of residual water. (Remove plug on top of leaving chilled water nozzle to add liquid.) 3. At the beginning of the next cooling season, refill cooler and add recommended inhibitor. 3 4 NOTES: 1. There must be minimum 8 ft (2.4 m) clear air space above unit. 2. Dimensions in [ ] are in millimeters. 3. The approximate operating weight of the unit is: 60 Hz UNIT Lb Kg 30GTN015 1640 744 30GTN015C 1732 786 30GTN020 1821 826 30GTN020C 1945 882 50 Hz UNIT Lb Kg 30GTN015 1741 790 30GTN015C 1833 831 30GTN020 1864 846 30GTN020C 1988 902 UNIT A 30GTN015 (1219) 4.-0. 30GTN020 (1207) 3.-111/2. LEGEND C — Copper Coils COMPR — Compressor MTG — Mounting NEC — National Electrical Code (U.S.A.) VAV — Variable-Air Volume Fig. 3 — Dimensional Drawing, 30GTN015,020 5 NOTES: 1. There must be minimum 8 ft (2.4 m) clear air space above unit. 2. Dimensions in [ ] are in millimeters. 3. The approximate operating weight of the unit is: 60 Hz UNIT Lb Kg 30GTN025 2170 984 30GTN025C 2324 1054 30GTN030 2268 1029 30GTN030C 2474 1122 50 Hz UNIT Lb Kg 30GTN025 2193 995 30GTN025C 2347 1065 30GTN030 2332 1058 30GTN030C 2538 1151 LEGEND C — Copper Coils COMPR — Compressor MTG — Mounting NEC — National Electrical Code (U.S.A.) VAV — Variable-Air Volume Fig. 4 — Dimensional Drawing, 30GTN025,030 6 NOTES: 1. There must be minimum 8 ft (2.4 m) clear air space above unit. 2. Dimensions in [ ] are in millimeters. 3. The approximate operating weight of the unit is: 60 Hz UNIT Lb Kg 30GTN035 2965 1345 30GTN035C 3273 1485 LEGEND C — Copper Coils COMPR — Compressor MTG — Mounting NEC — National Electrical Code (U.S.A.) Fig. 5 — Dimensional Drawing, 30GTN035 NOTE: All dimensions are in inches. Fig. 6 — Compressor Mounting Liquid Chiller OUTIN REFRIGERATING MACHINE U.N.2857 WATER OUTLET (LEAVING WATER) WATER INLET WATER (RETURN WATER) DRAIN Fig. 7 — Water Connection Locations Step 4 — Make Electrical Connections POWER SUPPLY — Electrical characteristics of available power supply must agree with unit nameplate rating. Supply voltage must be within limits shown in Tables 3A and 3B. IMPORTANT: Operating unit on improper supply voltage or with excess...