Carrier 40RMS, 40RMQ installation instructions Face-Split Coil Suction Liquid Line Piping Typical

IMPORTANT: Never attach the sensor to the suction manifold. Do NOT mount the sensor on a trapped por- tion of the suction line.

40RM Series evaporator coils have a face-split design. En- sure that lower circuit of coil is ®rst on/last off when con- nected to the condensing unit and/or system controls. See Fig. 6.

External TXV equalizer connections are provided and factory- brazed into the coil suction manifolds.

If suction line must be horizontal, clamp bulb to suction line at least 45 degrees above bottom, at approximately the 4 o'clock or 8 o'clock position. See Fig. 7.

NOTE: The 40RMQ units are supplied with factory-installed thermostatic expansion valves and check valve bypasses. No extra piping connections or kits are required to install the 40RMQ with a 38AQS condensing unit in a heat pump system, however, some ®eld supplied components may be required. See the following two sections.

LEGEND

TXV Ð Thermostatic Expansion Valve

NOTE: Component location arrangement shown for ®eld installation of sight glasses, solenoid valves, ®lter driers, and TXV sensing bulbs. The TXVs and equalizer lines are factory installed.

Fig. 5 Ð Face-Split Coil Suction and

Liquid Line Piping (Typical)

FIRST ON/LAST OFF=B

VERTICAL INSTALLATION

FIRST ON/LAST OFF=A

HORIZONTAL INSTALLATION

Fig. 6 Ð Typical Evaporator Coil Connections

(40RM, 40RMQ)

LEGEND

TXV Ð Thermostatic Expansion Valve

NOTE: The 8 o'clock position is shown above.

Fig. 7 Ð TXV Sensing Bulb Location

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