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PH4G--B: Installation Instruction
Step 6 – Indoor Airflow
The heating and/or cooling airflow does not require checking unless
improper performance is suspected. If a problem exists, be sure that all
supply-air and return-air grilles are open and free from obstructions, and
that the air filter is clean. When necessary, refer to Indoor Airflow and
Airflow Adjustments section to check the system airflow.
Step 7 – Metering Devices-TXV & Piston
This unit uses 2 types of metering devices. The outdoor metering device
is a fixed orifice and is contained in the brass hex-body in each liquid
line feeding the outdoor coils. The indoor metering device is a TXV type
device.
Fig. 23 – Refrigerant Circuit
A
MAX DISTANCE BETWEEN TOP OF FAN GRILLE AND BOTTOM OF FAN BLADE
Size
24
30
36
42
48
60
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
C99097
MOTOR
IN.
9.0
7.1
7.6
7.6
7.6
7.6
Fig. 25 – Fan Blade Position
30
Compressor
Access
Panel
Fig. 24 – Unit Access Panels
Step 8 – Pressure Switches
Pressure switches are protective devices wired into control circuit (low
voltage). They shut off compressor if abnormally high or low pressures
are present in the refrigeration circuit. These pressure switches are
specifically designed to operate with R-410A systems. R-22 pressure
switches must not be used as replacements for the R-410A system.
FAN GRILLE
MOTOR SHAFT
"A"
Control
Access
Panel
Blower
Access
Panel
A09215
A08505
mm
228
180
193
193
193
193
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