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.

13

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Carrier 012, 50LJQ008 installation instructions Bat, Ofc, Dat, Emc/Emfc, Emo/Emfo, Ifc, Unit Heater Required Config, Uration

012, 50LJQ008 specifications

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