Carrier 40RMS Ð Unit Wiring, Ð Fan Contactor Coil Data, Ð Typical Fan Discharge Connections

	LEGEND
CB	Ð Circuit Breaker
HC	Ð Heating Contactor
HTR	Ð Electric Heater
IFC	Ð	Indoor-Fan Contactor
IFM	Ð	Indoor-Fan Motor
NEC	Ð National Electrical Code
TB	Ð Terminal Block
T'STAT	Ð	Thermostat
		Factory Wiring
		Field Control Wiring

NOTE: Use copper conductors only.

→	Fig. 14 Ð Unit Wiring
	Table 6 Ð Fan Contactor Coil Data

UNIT	VOLTAGE	MAXIMUM
40RM, 40RMQ		HOLDING
	(vac)
40RMS		VA
007-034	24	10

Connecting Ductwork Ð Refer to the Carrier Sys- tem Design Manual for the recommended design and layout of ductwork. Figure 15 shows recommended duct connec- tion to units with 2 fans.

DISCHARGE CONNECTIONS Ð Duct ¯anges are factory supplied; they are shipped inside the unit attached to the hair- pin end of the coil tube sheet for ®eld installation. Using the existing screws, install the duct ¯anges on the unit's fan deck. Each fan discharge requires 2 ¯anges; each ¯ange must be bent in the middle to conform to the discharge opening. See Fig. 16. After ¯anges are installed, connect them to the sup- ply duct using a canvas connection to prevent vibration. It is important that this connection be properly fabricated to pre- vent high air friction losses and air noise.

RETURN CONNECTION Ð When using return-air duct- work, route return-air duct to the unit's return air inlet near the ®lter rack, using a canvas connection to prevent trans- mission of unit vibration. If the duct blocks off the unit's access panel, provide a slip joint in the ductwork to permit removal for servicing.

OUTDOOR-AIR INLET CONNECTION Ð Connect outdoor- air inlet to ®eld-installed accessory economizer. Refer to econo- mizer Installation Instructions.

Return-Air Filters Ð Type and size of ®lters are shown in Tables 1A-1F and are factory-supplied and in- stalled. In all units with 2 fans, a ®lter replacement tool (hook) is shipped inside the unit for ®eld use when replacing ®lters. See the Service section for instructions on ®lter element replacement.

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Fig. 15 Ð Typical Fan Discharge Connections

for Multiple Fan Units