N:06:02
Heating and Air Conditioning
3. Connect hoses to compressor.
See Section No.
N:06:01.
4.
Alt valves on station closed.
5. Disconnect white hose from valve on
Dial-a-
Charge cylinder. Place loose end into clean
receptacle.
6. Crack low side valve on manifold until hissing
heard.
Crack high side valve. If oil or white
vapour seen coming out of hose, slow down
gas release by closing valves slightly. Any oil
loss can be trapped in
recept *:le
to be replaced
into system later.
7. Watch gauges on station until both read zero
pressure. System now fully discharged.
(ALLOW 20 minutes to discharge).
8. At this point any repairs or replacement parts
can be fitted.
FILLING
DlALA-CHARGE
CYLINDER
WARNING NOTICE:
Goggles and gloves to be worn.
Handle refrigerant with care.
Well Ventilated Area
1.
Valves on D.A.C. closed.
2.
Connect white hose from left hand valve (2)
(Fig.
33) to liquid connection on bulk supply.
3. Crack valve on bulk supply. Loosen connection
on D.A.C. till slight hissing heard, tighten
connection. This is to purge the hose of any air.
4.
Open valve (2). Liquid flow into cylinder —
visible in sight
g'c$s,
until bulk tank and D.A.C.
at same
pressu
5. Crack vent valve on top of cylinder to allow
more liquid into cylinder.
6. Rotate shield to
R-12
position as marked on
bottom of safety shield.
7. Allow liquid to flow into cylinder till approx.
3-3.5
lb. (1.36-1.58
kl).
Measure by the
liquid level in sight glass.
8. Close all valves.
9. Slacken white hose slowly to allow liquid in
hose to disperse. Gloves must be worn at this
point.
10.
Disconnect hose from R-12 supply.
dial-a-charge
blue hose
to bulk gas
white
hose
izu±
red hose
to vacuum pump
Fig. 33
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