PHD4 Series K and WPH4 Series K: Installation Instruction
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
30
A08505
Fig. 26 – Fan Blade Position
Step 9 – Loss of Charge Switch
This switch is located on the liquid line and protects against low
suction
pressures caused by such events as loss of charge, low
airflow across
indoor coil, dirty filters, etc. It opens on a pressure
drop at about 20 psig.
If system pressure is above this, switch
should be closed. To check
switch:
1. Turn off all power to unit.
2. Disconnect leads on switch.
3. Apply ohm meter leads across switch. You should have continuity
on a good switch.
NOTE:
Because these switches are attached to refrigeration
system
under pressure, it is not advisable to remove this device for
troubleshooting unless you are reasonably certain that a problem
exists.
If switch must be removed, remove and recover all system
charge so that
pressure gauges read 0 psig. Never open system
without breaking
vacuum with dry nitrogen.
Step 10 – High-Pressure Switch
The high-pressure switch is located in the discharge line and
protects
against excessive condenser coil pressure. It opens at 650
psig.
High pressure may be caused by a dirty outdoor coil, failed fan
motor, or
outdoor air recirculation.
To check switch:
1. Turn off all power to unit.
2. Disconnect leads on switch.
3. Apply ohm meter leads across switch. You should have continuity
on a good switch.
Step 11 – Copeland Scroll Compressor (R-410A
Refrigerant)
The compressor used in this product is specifically designed to
operate with R-410A refrigerant and cannot be interchanged.
The scroll compressor pumps refrigerant throughout the system by the
interaction of a stationary and an orbiting scroll. The scroll compressor
has no dynamic suction or discharge valves, and it is more tolerant of
stresses caused by debris, liquid slugging, and flooded starts. The
compressor is equipped with an internal pressure relief port. The
pressure relief port is a safety device, designed to protect against
extreme high pressure. The relief port has an operating range between
550 and 625 psig differential pressure.
Step 12 – Refrigerant System
This step covers the refrigerant system including the compressor oil
needed, servicing systems on roofs containing synthetic materials, the
filter drier and refrigerant charging.
Refrigerant
Compressor Oil
The Copeland scroll compressor uses 3MAF POE oil. If additional oil is
needed, use Uniqema RL32-3MAF. If this oil is not available, use
Copeland Ultra 32 CC or Mobil Arctic EAL22 CC. This oil is extremely
MAX DISTANCE BETWEEN TOP OF FAN GRILLE AND BOTTOM OF FAN BLADE
Size
“A”
IN.
mm
24
7.1
180
30
8.0
203
36
7.6
193
42
7.6
193
48
7.6
193
60
7.6
193
MOTOR
FAN GRILLE
MOTOR SHAFT
A
WARNING
!
EXPLOSION HAZARD
Failure to follow this warning could result in
personal injury, death or property damage.
Wear safety glasses and gloves when handling
refrigerants. Keep torches and other ignition
sources away from refrigerant and oils.
WARNING
!
PROPERTY HAZARD, PERSONAL INJURY OR
ENVIRONMENTAL HAZARD
Failure to follow this warning could result in property damage or
personal injury or death.
This system uses R-410A refrigerant which has higher operating
pressures than R-22 and other refrigerants. No other refrigerant may be
used in this system. Gauge set, hoses, and recovery system must be
designed to handle R-410A If you are unsure consult the equipment
manufacturer.
