Manual
I Split System Condensers Installation Instructions
Evacuating, And Charging Instructions
NOTE
Intentional release of CFC or HCFC Refrigerant to the
Atmosphere violates Federal Law, It may also violate
State and Local Codes, Check all Federal, State and
Local Codes before proceeding,
These instructions are intended for use with condensing
units that are precharged at the factory with adequate re-
frigerant to handle 25 feet.
NOTE: Do not use any portion of the charge for purging or
leak testing. It is mandatory that a thorough evacuation of
the refrigerant in the piping and evaporator be performed.
The liquid line and suction line service valves have been
closed after final testing at the factory. Do not disturb
these valves until the lines have been leak checked
and evacuated or the charge in the unit may be lost.
Recommended Method Of Evacuating A
System
1. Connect the vacuum pump to the suction and liquid line
gauge ports.
2. If the evacuation is being performed on a new system
installation, the valves should be kept in the "front seated"
(closed) position. This will allow the mechanic to evacuate
the refrigeration lines and the indoor coil, without disturbing
the factory charge in the outdoor unit.
3. Follow the vacuum pump manufacturer's instructions.
Allow the pump to operate until the system has been eva-
cuated down to 300 microns. Allow the pump to continue
running for an additional 15 minutes. Turn offthe pump and
leave the connections secured to the two service valves.
After 5 minutes, if the system fails to hold 500 microns or
less, check all connections for tight fit and repeat the evac-
uation procedure.
4. Isolate the vacuum pump from the system by closing the
shutoff valves on the gauge bar. Disconnect the vacuum
pump.
Valve Actuation: Service Valves
Remove the service valve cap, if there is a male valve stem
see instructions for Ball Valves. For the standard service
valve there are two variations, but both have internal
stems. The first style uses an internal snap ring to retain the
valve stem and the second has a rolled top and also has
finer threads on the valve cap. NOTE: You may encounter
more than one type of valve on a unit,
For service valves fully insert a hex wrench into the stem. A
back-up wrench is required on the valve body to open the
valve stem. Backout counterclockwise until the valve stem
stops or just touches the retaining ring. NOTE: THIS IS
NOT A BACKSEATING VALVE. For valves with retainer
rings care must be taken to prevent dislodging them when
opening valve.
The service valve cap is a primary seal for the valve and
must be properly tightened to prevent leaks. Make sure cap
is clean and apply refrigerant oil to threads and sealing sur-
face of cap,
For valves with retaining rings: Replace service valve
cap and torque to; 8-11 ft. Ibs. on 1/4" and 3/8" valves,
12-16 ft. Ibs. on 5/8" and 3/4", 15-21 ft. Ibs on 7/8" valves. If
torque wrench is not available, tighten cap finger tight and
then tighten one (1) additional wrench flat or 1/6 of a turn.
For valves with rolled tops: Replace service valve cap
tighten cap finger tight and then tighten one (1) additional
wrench flat or 1/6 of a turn to properly seat the sealing sur-
faces. Subsequent installations will seat with 1/2 to 1
wrench flat of turning.
Gauge Ports: All Valves
Check for leaks at the schrader port and tighten valve core
if necessary, Install plastic caps finger tight.
Ball Valves
On models with ball type valves use a 6" crescent wrench
to rotate the valve stem 90° counter clockwise. Retighten
valve cap to 6-8 ft. Ibs. If torque wrench is not available,
tighten cap finger tight and then tighten one (1/2) additional
wrench flat.
REFRIGERATION PIPING & CHARGING
The recommended method of addition or removal of refrig-
erant is by weight.
Some matching coils may need more refrigerant than the
factory charge. If you can't determine charge by weight,
then check charge by superheat method and performance
curves. The oil charge is sufficient for 50 feet.
For oil requirements refer to Figure 5. For piping lengths
up to 75 feet refer to Figure 6 for pipe size, and Figure 7 for
refrigerant adjustment.
On applications where liquid floodback to the compressor
is likely to occur, use of a crankcase heater is recom-
mended,
Figure 5 - Addition of Refrigeration Oil
Distance
(Feet)
0-50
51
6O
75
Suction Line Size
5/8, 3/4_ 7/8 1-1/8
1 oz. 2 oz,
2 oz. 4 oz,
3 oz. 6 oz.
Figure 6 - LINE SIZING
Model Series
All Series
All Series
Size-ton Liquid Suction
1 1/2 to 3 3/8" 3/4"
3 1/2 to 5 3/8" 7/8"
Figure 7 Addition of Refrigeration Charge
Liquid Line Diameter oz, Per Linear Ft, *
3/8 .60
1/2 1,20