Carrier 50AH024-096 specifications

of the tubing. Use a 1/4-in. hole to mount the valve. Clean and debur the tubing before doing any brazing to ensure that no chips or debris are left in the refrigerant circuit. Remove the Schrader valve cap and core before doing any brazing.

5.After brazing the tubing to the self-sealing coupling halves, evacuate each line to 500 microns. Check to make sure that each line holds a vacuum after removal of the vacuum pump (indicating no leaks). Add the appropriate charge of R-410A refrigerant using the Schrader valves. Refasten male halves to outer back panel of evaporator section with flanges and screws (if they were removed for brazing to tubing). Wipe off coupling seals and threaded surfaces with a clean cloth to prevent the inclusion of dirt or foreign material into the system. Lubricate rubber seal and metal seal in the male halves with refrigeration oil. Thread coupling halves together by hand to ensure proper mating of threads. Continue to handthread each half-cou- pling to its mating half until resistance is felt (approxi- mately 11/2 to 13/4 turns). Complete the connection of the mating half-couplings with a wrench. The suction line couplings (size 12) will be totally engaged after an addi- tional 51/2 to 53/4 turns. The liquid line couplings (size 8) will be totally engaged after an additional 41/2 to 43/4 turns. Use a backup wrench to prevent the couplings from twisting.

6.Refrigerant piping must be insulated in accordance with local codes and/or applicable ASHRAE standards. Insu- lation exposed to weather must be suitable for outdoor use. Provide protection from water and shielding from so- lar radiation as necessary.

7.Add refrigerant to the system to compensate for the addi- tional interconnecting tubing. The suction line should be pitched downward to the compressor, sloping approxi- mately 1/4-in. every 10 ft to facilitate oil return. P-traps (field supplied) are required for all suction line risers ev- ery 15 ft. When the evaporator is above the condensing section, an inverted P-trap should be incorporated as close as possible to the evaporator (this minimizes flood- back/oil slugging during the off cycle). If the condensing

section is more than 50 ft above the evaporator, consult Carrier for specific refrigeration components.

Step 8 — Make Electrical Connections — Con- nect power wiring to junction box located on unit side near control box access panel. All wiring must comply with National Electrical Code (NEC) and all local code requirements.

Operating voltage to compressor must be within voltage range as indicated on unit nameplate. On 3-phase units, volt- ages between phases must be balanced within 2% and current must be balanced within 10%. Contact local power company for correction of improper voltage or phase imbalance. Unit failure as a result of operation on improper line voltage or ex- cessive phase imbalance constitutes abuse and may cause dam- age to electrical components. Such operation would invalidate any applicable Carrier warranty.

Install a fused disconnect per NEC. Refer to unit nameplate and Tables 2A-2L for fuse sizes and wire amperages for all units.

FIELD CONTROL WIRING — Install a Carrier-approved accessory thermostat assembly according to installation instructions provided by thermostat manufacturer. Locate thermostat assembly on a solid wall in the conditioned space away from drafts to sense average room temperature.

Using thermostat cable or equivalent single leads of no. 18 AWG (American Wire Gage) colored wire, route cable or wire from the subbase terminals, up and through connector on unit side (below power lead junction box) and connect to low-volt- age terminal block inside the control box.

THERMOSTAT WIRE — Use 18 gage for 0 to 50-ft long wires and 16 gage for 51 to 75-ft wire lengths.

Step 9 — Adjust Fan Speed — Adjust fan speed to meet jobsite conditions. Refer to Tables 3 and 4 to determine fan speed settings. See Service section of this document for instructions to adjust fan speed.

The evaporator and condenser fan motors on all units are belt drive.

Table 2A — Electrical Data — Standard Evaporator Motor with Standard Condenser Motor

		VOLTAGE							FAN MOTORS
UNIT	V-PH	RANGE			COMPRESSOR			Evaporator		Condenser		POWER SUPPLY
								(Standard)		(Standard)
50AH	(60 Hz)
		Min	Max	QTY		RLA	LRA	Hp	FLA	Hp	FLA	Min Ckt	MOCP
												Amps	Amps
024	208/230-1	187	254	1		13.5	58.0	1/4	1.25	1/3	1.7	19.8	35
036	208/230-1	187	254			16.7	79.0	1/3	1.7	1/3	1.7	24.3	40
	208/230-3	187	254	1		10.4	73.0	1/3	1.3	1/3	1.3	15.6	25
	460-3	414	508			5.8	38.0	1/3	0.7	1/3	0.7	8.6	15
048	208/230-1	187	254	1		19.9	109.0	1/3	1.7	1/3	1.7	28.3	50
	208/230-3	187	254			13.6	83.1	1/3	1.3	1/3	1.3	19.6	35
	460-3	414	508			6.1	41.0	1/3	0.7	1/3	0.7	8.9	15
060	208/230-1	187	254			26.4	134	1/3	1.7	1/3	1.7	36.4	65
	208/230-3	187	254	1		16.0	110.0	1/3	1.3	1/3	1.3	22.6	40
	460-3	414	508			7.8	52.0	1/3	0.7	1/3	0.7	11.1	20
072*	208/230-1	187	254			16.7	79.0	1/2	2.5	1	4.2	44.3	60
	208/230-3	187	254	2		10.4	73.0	1/2	1.8	1	3.2	28.4	40
	460-3	414	508			5.8	38.0	1/2	0.9	1	1.6	15.6	20
096*	208/230-1	187	254			19.9	109.0	3/4	3.2	1 1/2	6.5	54.5	75
	208/230-3	187	254	2		13.6	83.1	3/4	2.4	1 1/2	4.8	37.8	50
	460-3	414	508			6.1	41.0	3/4	1.2	1 1/2	2.4	17.3	25

LEGEND

HACR — Heating, Air Conditioning, and Refrigeration

Hp — Horsepower

FLA — Full Load Amps

LRA — Locked Rotor Amps

MOCP — Maximum Overcurrent Protection (HACR breaker)

RLA — Rated Load Amps

*Unit has two compressors.

10