Carrier 48EZ(N)-A Unit Operation and Safety Hazard, Refrigerant System, Compressor Oil

ACCUMULATOR￿ ￿ ￿ COMPRESSOR

HP S

OUTDOOR COIL

TXV in Metering

Position

LCS

INDOOR COIL

LEGEND	Bypass
	Position
HPS – High Pressure Switch
LCS – Loss of Charge Switch
Accurater®Metering De vice
Arrow indicates direction of flow

￿

￿

C03011

48EZ -- A

ACCUMULATOR COMPRESSOR

Fig. 25 - Typical Heat Pump Operation, Cooling Mode

OUTDOOR COIL

TXV in Bypass

Position

LCS

HP S

INDOOR COIL

Metering￿

Position

LEGEND

HPS – High Pressure Switch

LCS – Loss of Charge Switch

Accurater®￿Metering De vice

Arrow indicates direction of flow

Fig. 26 - Typical Heat Pump Operation, Heating Mode

C03012

!WARNING

UNIT OPERATION AND SAFETY HAZARD

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

This system uses Puron (R-410A) refrigerant which has higher operating pressures than R-22 and other refrigerants. No other refrigerant may be used in this system. Gauge set, hoses, and recovery system must be designed to handle Puron. If you are unsure, consult the equipment manufacturer.

Refrigerant System

This information covers the refrigerant system of the 48EZ-A, including the compressor oil needed, servicing systems on roofs containing synthetic materials, the filter drier and refrigerant charging.

Compressor Oil

If additional oil is needed use Uniqema RL32-3MAF. If this oil is not available, use Copeland Ultra 32CC or Mobil Artic EAL22CC. This oil is extremely hygroscopic, meaning it absorbs water readily. POE oils can absorb 15 times as much water as other oils designed for HCFC and CFC refrigerants. Take all necessary precautions to avoid exposure of the oil to the atmosphere.

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