Carrier 30GTN015-035 installation instructions Rigging with Spreader Bars Field Supplied

	MAXIMUM		LIFTING		CENTER OF GRAVITY
UNIT	SHIP WT		HOLES		“B”		“C”		“D”
30GTN			“A”
	Lb	Kg	in.	mm	in.	mm	in.	mm	in.	mm
015	1876	851	94.0	2388	48.0	1219	23.0	583	49.5	1256
020	2031	921	94.0	2388	47.5	1207	23.0	583	49.5	1256
025	2415	1095	94.0	2388	51.0	1295	34.5	876	73.5	1867
030	2606	1182	94.0	2388	51.0	1295	34.5	876	73.5	1867
035	3365	1526	127.0	3225	66.5	1689	35.5	901	73.5	1867

Fig. 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 in- stalled, 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 Con- nections — When facing the cooler side of the unit, the re- turn water connection is on the left and the leaving water con- nection 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 rec- ommended using inhibited ethylene glycol or other suitable in- hibited 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 ethyl- ene 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 inhib- ited ethylene glycol (or other suitable inhibited anti- freeze) 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