Carrier 30GTN015-035 User Manual

30GTN015-035 Reciprocating Liquid Chillers with ComfortLink™ Controls 50/60 Hz

Installation Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11

Step 1 — Rig and Place the Unit. . . . . . . . . . . . . . . . . . 1

•RIGGING

•PLACING UNIT

•MOUNTING UNIT

Step 2 — Check Compressor Mounting . . . . . . . . . . 3

Step 3 — Cooler Fluid and Drain Piping

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

•PREPARATION FOR YEAR-ROUND OPERATION

•PREPARATION FOR WINTER SHUTDOWN

Step 4 — Make Electrical Connections . . . . . . . . . . . 7

•POWER SUPPLY

•POWER WIRING

Step 5 — Install Accessories . . . . . . . . . . . . . . . . . . . . 11

•ELECTRICAL

•HOT GAS BYPASS

Step 6 — Refrigerant Circuit. . . . . . . . . . . . . . . . . . . . . 11

•LEAK TESTING

•DEHYDRATION

•REFRIGERANT CHARGE

SAFETY CONSIDERATIONS

Installing, starting up, and servicing air-conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc).

Only trained, qualified installers and service mechanics should install, start up, and service this equipment (Fig. 1).

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.

•Keep quenching cloth and fire extinguisher nearby when brazing.

•Use care in handling, rigging, and setting bulky equipment.

•See Tables 1A and 1B for Physical Data.

ELECTRIC SHOCK HAZARD

Open all remote disconnects before servicing this equipment.

Fig. 1 — Model 30GTN (020 Shown)

INSTALLATION

Step 1 — Rig and Place the Unit

RIGGING — Preferred method is with spreader bars from above the unit. Use 2-in. (50 mm) OD pipe or hooks in lifting holes. Rig with 4 cables and spreader bars. All panels must be in place when rigging. See rigging label on unit for details concerning shipping weights, distance between lifting holes, center of gravity, and spreader bar dimensions. See Fig. 2.

If overhead rigging is not possible, place chiller on skid or pad for rolling or dragging. When rolling, use a minimum of 3 rollers. When dragging, pull the pad. Do not apply force to the unit. When in final position, raise from above to lift unit off pad.

All panels must be in place when rigging.

PLACING UNIT — There must be at least 4 ft (1.2 m) for service and for unrestricted airflow on all sides of unit, and a minimum of 8 ft (2.4 m) clear air space above unit. Provide ample room for servicing cooler. For cooler removal see clearance requirements in Fig. 3-5. For multiple units, allow 8 ft (2.4 m) separation between units for airflow and service.

If unit is to be used in an area with high solar radiation, mounted position should be such that control box is not exposed to direct solar radiation. Exposure to direct solar radiation could affect the temperature switch controlling cooler heaters. See Table 2.

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. 563-068	Printed in U.S.A.	Form 30GTN-10SI	Pg 1	1-00	Replaces: New
Tab	5c

Table 1A — Physical Data — 60 Hz

	UNIT 30GTN	015		020			025			030		035
	COMPRESSOR				Reciprocating, Semi-Hermetic
	No. ...Type	1...06DG537		1...06E2250			1...06E7265			1...06E7275		1...06E7299
	No. Cyls (ea)...Speed, Rpm (r/s)	6...1750 (29)		4...1750 (29)			6...1750 (29)			6...1750 (29)		6...1750 (29)
	Capacity Steps	3		2			3			3		3
	Oil Charge*, Pt (L)	8 (3.8)		17 (8.0)			21 (9.9)			21 (9.9)		19 (9.0)
→	REFRIGERANT CHG, R-22
	Total/Over Clear Glass, lb (kg)	25.0 (11.3)/5.0 (2.3)		31.0 (14.1)/7.0 (3.2)			40.0 (18.1)/12.0 (5.4)			47.0 (21.3)/14.0 (6.4)		57.0 (25.9)/8.0 (3.6)
	CONDENSER FANS, Type				Propeller Type, Direct Drive
	No. ...Diameter, in. (mm)	2...30 (762)					2...30 (762)					3...30 (762)
	Total Airflow, Cfm (L/s)	10,600 (5000)					15,700 (7400)					23,700 (11 200)
	Speed, Rpm (r/s)	1140 (19)					1140 (19)					1140 (19)
	CONDENSER COIL, Type						Horizontal Plate Fin
	Rows...Fins/in. (Fin Spacing mm)	2...19 (1.34)		3...17 (1.49)			2...19 (1.34)			3...17 (1.49)		3...17 (1.49)
	Total Face Area, sq ft (m2)	23.5 (2.18)		23.5 (2.18)			39.2 (3.64)			39.2 (3.64)		58.4 (5.43)
	COOLER			Shell and Tube, Direct Expansion
	Net Water Volume, gal. (L)	6.8 (25.7)					9.9 (37.5)					12.8 (48.4)
	Maximum Design Working Pressure						Refrigerant Side — 235 (1620)
	psig (kPa)						Water Side — 150 (1034)
	WATER CONNECTIONS, in.
	Inlet and Outlet				2 FPT							21/2 FPT
	Drain			3/4 MPT								3/4 MPT

*See Oil Charge section for Carrier-approved oil.

Table 1B — Physical Data — 50 Hz

	UNIT 30GTN	015		020		025		030
	COMPRESSOR			Reciprocating, Semi-Hermetic
	No. ...Type	1...06E2250		1...06E7265		1...06E7275		1...06E7299
	No. Cyls (ea)...Speed, Rpm (r/s)	4...1450 (24.2)		6...1450 (24.2)		6...1450 (24.2)		6...1450 (24.2)
	Capacity Steps	2		3		3		3
	Oil Charge*, Pt (L)	17 (8.0)		21 (9.9)		21 (9.9)		19 (9.0)
→	REFRIGERANT CHG, R-22
	Total/Over Clear Glass, lb (kg)	26.0 (11.8)/6.0 (2.7)		35.0 (15.9)/8.0 (3.6)		42.0 (19.0)/12.0 (5.4)		49.0 (22.2)/14.0 (6.4)
	CONDENSER FANS, Type			Propeller Type, Direct Drive
	No. ...Diameter, in. (mm)	2...30 (762)				2...30 (762)
	Total Airflow, Cfm (L/s)	10,600 (5000)				15,700 (7400)
	Speed, Rpm (r/s)	950 (15.8)				950 (15.8)
	CONDENSER COIL, Type			Horizontal, Plate Fin
	Rows...Fins/in. (Fin Spacing mm)	2...19 (1.34)		3...17 (1.49)		2...19 (1.34)		3...17 (1.49)
	Total Face Area, sq ft (m2)	23.5 (2.18)		23.5 (2.18)		39.2 (3.64)		39.2 (3.64)
	COOLER			Shell and Tube, Direct Expansion
	Net Water Volume, gal. (L)	6.8 (25.7)				9.9 (37.5)
	Maximum Design Working Pressure			Refrigerant Side — 235		(1620)
	psig (kPa)			Water Side — 150 (1034)
	WATER CONNECTIONS, in.
	Inlet and Outlet			2 FPT
	Drain			3/4 MPT

*See Oil Charge section for Carrier-approved oil.

1201	2

	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 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 separatelyfused 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

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

LEGEND

UNIT

A

C

—

Copper Coils

30GTN015

(1219)

COMPR

—

Compressor

MTG

—

Mounting

4′-0″

NEC

— National Electrical Code (U.S.A.)

30GTN020

(1207)

VAV

—

Variable-Air Volume

3′-111/2″

Fig. 3 — Dimensional Drawing, 30GTN015,020

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