10
• When relocating the unit to another place, perform the
evacuation using a vacuum pump.
• Refrigerant added to the unit must be in liquid form. (Does
not apply to units using R-22.)
Safe Refrigerant Handling
While these items will not cover every conceivable situation,
they should serve as a useful guide.
Refri gerants are hea vier than air. They ca n "push out"
the oxygen in your lungs or in any enclosed space.To
avoid possible difficulty in breathing or death:
• Never purge refrigerant into an enclosed room or
spac e. By law , all refrigerants must be reclaimed.
• If an indoor leak is suspected, throughly ventilate the
area be fore beginning work.
• Liquid refrigerant can be very cold. To avoid possible
frostbite or blindness, avoid contact and wear gloves
and goggles. If liquid refrigerant does contact your
skin or eyes, seek medical help immediately.
• Always follow EPA regulations. Never bur n refrig-
erant, as poiso nous gas will be pro du ced.
WARNING
To a v oid poss ible ex plosion :
• Never apply flame or st eam to a refrigerant cylinder.
If you must heat a cylinder for faster charging,
par tial ly immer s e it in warm water.
• Never fill a cyl in der more than 80% ful l of liquid re-
frigerant.
• Never add anything other than R-22 to an R-22 cy-
linder or R-410A t o an R-410A cylinder. The service
equipment used must b e li st ed or certified for the
type of refrige r ant use d .
• Store cylinders in a cool, dry place. Never use a cy-
linder as a platform or a roll er.
WARNING
To avoid possible explosion, use only returnable (not
disposable) service cylinders when removing refrig-
erant from a system.
• Ensure th e cyli nder is free of damage which could
lead to a leak or explosion.
• Ensure the hydrostatic test date do es not exceed
5 years.
• Ens ure the pressure rat ing meets or excee ds 400
lbs.
Whe n in doubt , do not use cylinder.
WARNING
Use caution when handling the packed valve:
• Open the valve stem unit it comes in contact against the
stopper. Do not attempt to open further.
C
D
B
Figure 24
•Securely tighten the valve stem cap with a spanner or
similar tool.
• See tightening torque table in Tightening Connection
section.
Safety Check
After completing the electrical installation:
1. Grounding: After grounding the unit, measure the ground-
ing resistance by visually inspecting the unit and by us-
ing a grounding resistance tester, making sure the ground-
ing resistance is less than 4.0 ohms.
2. Electrical leakage check (to be performed during opera-
tion): During the test operation after complete installation
of the unit, the qualified installer may use the electroprobe
and multimeter to perform the electrical leakage check.
Turn off the unit immediately if leakage occurs.