Installation guide

LEGEND
HPS - High Pressure Switch
LCS - Loss of Charge Switch
:_ Accurater_ Metering Device
] Arrow indicates direction of flow
OUTDOOR COIL
Metering
Position
Bypass
pc_itlon
LCS
INDOOR COIL
Fig. 22--Typical Heat Pump Operation, Heating Mode
LEGEND
HPS - High Pressure Switch
LCS - Loss of Charge Switch
___ Accurate¢' Metering Device
] Arrow indicates direction of flow
OUTDOOR COIL
_lJ
Bypass
Position
Mete(ing
Position
LCS
INDOOR COIL
C00095
#-
C00096
Fig. 23--Typical Heat Pump Operation, Cooling Mode
NOTE: If the problem causing the inaccurate readings is a
refrigerant leak. refer to Check for Refrigerant Leaks section.
INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS
Table 4 shows both heating and cooling airflows at various
external static pressures. Refer to these tables to determine the
airflow for the system being installed.
NOTE: Be sure that all supply-and return-air grilles are open, free
from obstructions, and adjusted properly.
Airflow can be changed by changing the lead connection of the
blower motor.
Unit 50JZ three-speed motors (except sizes 030 and 048) are
factory wired for low speed operation. Units 50JZ 030 and 048 are
factory wired for medium speed.
For 208/230-v Motors:-- The motor leads are color-coded as
follows:
3-SPEED
Black = high speed
Blue = medium speed
Red = low speed
To change the speed of the blower motor (BM), remove the fan
motor speed leg lead from the blower relay IBRL This wire is
attached to IGC terminal BM for single-phase and 3-phase units.
To change the speed, remove and replace with lead for desired
blower motor speed. Insulate the removed lead to avoid contact
with chassis parts.
For 460-v GE Motors The motor leads are color coded as
follows:
17