Carrier 38AUZ appendix Install Accessories, Complete Electrical Connections, Field Power Supply

Table 4 — Refrigerant Specialities Part Numbers.

UNIT	LIQUID LINE	LIQUID LINE	LLSV	SIGHT	FILTER	SUCTION LINE
	SIZE (in.)	SOLENOID VALVE (LLSV)	COIL	GLASS	DRIER	ACCUMULATOR
38AUZ*07	3/8	200RB5T3M	AMG/24V	AMI-1TT3	P502-8304S*	S-7063S*
38AUZ*08	3/8	200RB5T3M	AMG/24V	AMI-1TT3	P502-8304S*	S-7063S*
	1/2	200RB5T4M	AMG/24V	AMI-1TT4	P502-8304S	S-7063S*
38AUZ*12	1/2	200RB6T4M	AMG/24V	AMI-1TT4	P502-8307S*	S-7063
38AUZ*14	5/8	200RB6T5M	AMG/24V	AMI-1TT5	P502-8307S*	S-7063

*Bushings required.

LEGEND

TXV — Thermostatic Expansion Valve

Fig. 5 — Location of Sight Glass(es)

and Filter Driers

	Field Service
Factory	Access Port
	(Schrader core)
High-Flow
Access Port
Service Valve
with Stem Cap	Sweat
	Connection

Fig. 6 — Typical Piping Connection Assembly

Pressure-test all joints from outdoor unit connections over to the evaporator coil, using nitrogen as pressure and with soap- and-bubbles.

When pressure-testing is completed, remove the nitrogen source at the outdoor unit service valves and re-install the two Schrader valve cores. Torque the cores to 2-3 in-lbs (23-34 N-cm).

EVACUATION/DEHYDRATION — Evacuate and dehydrate the connected refrigeration system (excluding the 38AU unit) to 500 microns using a two-stage vacuum pump attached to the service ports outside the 38AU service valves, following de- scription in GTAC II, Module 4, System Dehydration.

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal injury, death and/or equipment damage.

Puron® (R-410A) refrigerant systems operate at higher pressures than standard R-22 systems. Do not use R-22 service equipment or components on Puron refrigerant equipment.

PRELIMINARY CHARGE — Before starting the unit, charge R-410A liquid refrigerant into the high side of the system through the liquid service valve. The amount of refrigerant added must be at least 80% of the operating charge listed in the Physical Data table (Tables 1A and 1B, pages 4 and 5) LESS the factory charge quantity (if factory shipping charge has not been removed). Allow high and low side pressures to equalize. If pressures do not equalize readily, charge R-410A vapor (using special service manifold with expansion device) into the suction line service port for the low side of system to assure charge in the evaporator. Refer to GTAC II, Module 5, Charging, Recover, Recycling, and Reclamation for liquid charging procedures.

Step 6 — Install Accessories

Accessories requiring modifications to unit wiring should be completed now. These accessories may include Winter Start controls, Low Ambient controls, phase monitor, Compressor LOCout. Refer to the instructions shipped with the accessory.

Step 7 — Complete Electrical Connections

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Do not use gas piping as an electrical ground. Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with NEC (National Electrical Code); ANSI/ NFPA 70, latest edition (in Canada, Canadian Electrical Code CSA [Canadian Standards Association] C22.1), and local electrical codes.

NOTE: Check all factory and field electrical connections for tightness. Field-supplied wiring shall conform with the limitations of 63°F (33°C) rise.

Field Power Supply —

If equipped with optional Powered Convenience Outlet: The power source leads to the convenience outlet's transformer primary are not factory connected. Installer must connect these

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