Carrier 012, 50LJQ008 Ð Field Wiring Connections, Ð Field Control Wiring Raceway

LEGEND

BAT	Ð Battery	OFC	Ð Outdoor-Fan Contactor
C	Ð Contactor	P	Ð Plug
CB	Ð Circuit Breaker	TB	Ð Terminal Board
DAT	Ð Discharge-Air Thermistor	TRAN Ð Transformer
EMC/EMFC	Ð Energy Management Closed		Field Wiring
EMO/EMFO	Ð Energy Management Open
			Factory Wiring
EQUIP	Ð Equipment
GND	Ð Ground		Splice Connection (Factory Supplied)
HR	Ð Heater Relay
IFC	Ð Indoor-Fan Contactor

Fig. 16 Ð Field Wiring Connections

UNIT

CONTROL

BOARD

RACEWAY

Fig. 17 Ð Field Control Wiring Raceway

Step 6 Ð Adjust Indoor-Fan Speed Ð Adjust in- door fan speed to meet jobsite conditions.

For units with electric resistance heating, required mini- mum L/s (cfm) is 1062 (2250) for 50LJQ008 and 1416 (3000) or 50LJQ012, with the following exceptions.

UNIT	UNIT	HEATER	UNIT	REQUIRED
			CONFIG-	MINIMUM
50LJQ	VOLTAGE	kW
			URATION	L/s	Cfm
	220	50.0	Horizontal	1534	3250
			or Vertical
012
	400	50.0	Horizontal	1605	3400
			or Vertical

Tables 5A and 5B show fan rps and rpm at motor pulley settings. Refer to Tables 6-13 to determine fan speed settings.

Fan motor pulleys are factory set for speed shown in Tables 1A and 1B.

To change fan speed:

a.Shut off unit power supply.

b.Loosen belt by loosening fan motor mounting nuts. See Fig. 18.

c.Loosen movable pulley ¯ange setscrew (see Fig. 19).

d.Screw movable ¯ange toward ®xed ¯ange to increase speed and away from ®xed ¯ange to decrease speed. Increasing fan speed increases load on motor. Do not exceed maxi- mum speed speci®ed in Tables 1A and 1B.

e.Set movable ¯ange at nearest keyway of pulley hub and tighten setscrew (see Tables 1A and 1B for speed change for each full turn of pulley ¯ange).

To align fan and motor pulleys:

a.Loosen fan pulley setscrews.

b.Slide fan pulley along fan shaft.

c.Make angular alignment by loosening motor from mount- ing plate.

To adjust belt tension (see Fig. 18):

a.Loosen fan motor mounting bolts.

b.Slide motor mounting plate away from fan scroll for proper belt tension (13 mm [1¤2-in.] de¯ection with one ®nger) and tighten mounting bolts.

c.Adjust bolt and nut on motor mounting plate to secure motor in ®xed position.

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