Chevrolet 30 Series 1967 Service Manual page 41

is in operation)
0 H. P. VAPOR |
R liquid that you can touch or that touches you is
- 1 2
at least 21.7U F. below zero. The eyeballs can't take
much of this temperature. If R-12 liquid should
strike the eyeballs, here is what to do:
1. Keep calm.
2. Do not rub the eyes!
quantities of cold water to gradually get the tem­
perature above the freezing point. The use of min­
eral, cod liver or an antiseptic oil is important in
providing a protective film to reduce the possibility
of infection.
3. As soon as possible, call or consult an eye specialist
for immediate and future treatment.
REMEMBER - "An ounce of prevention is worth a
pound of cure."
PRECAUTIONS IN HANDLING REFRIGERANT LINES
• All metal tubing lines should be free of kinks, be­
cause of the restriction that kinks will offer to the
flow of refrigerant. The refrigeration capacity of the
entire system can be greatly reduced by a single
kink.
• The flexible hose lines should never be bent to a
radius of less than times the diameter of the hose.
1 0
• The flexible hose lines should never be allowed to
come within a distance of
manifold.
• Flexible hose lines should be inspected at least once
a year for leaks or brittleness. If found brittle or
leaking they should be replaced with new lines.
• Use only sealed lines from parts stock.
H. P. LIQUID 0 I. P. LIQUID
F ig. 21 - C y c le o f O peration - Four-Season
Splash the affected area with
- / " of the exhaust
2 1 2
HEATER AND AIR CONDITIONING 1A-13
£•] L. P. VAPOR |
• When disconnecting any fitting in the refrigeration
system, the system must first be discharged of all
refrigerant. However, proceed very cautiously r e ­
gardless of gauge readings. Open very slowly, keep­
ing face and hands away so that no injury can occur
if there happens to be liquid refrigerant in the line.
If pressure is noticed when fitting is loosened, allow
it to bleed off very slowly.
CAUTION:
Always wear safety goggles wnen
opening refrigerant lines.
• In the event any line is opened to atmosphere, it
should be immediately capped to prevent entrance
of moisture and dirt.
• The use of the proper wrenches when making con­
nections on "O" ring fittings is important.
of improper wrenches may damage the connection.
The opposing fitting should always be backed up with
a wrench to prevent distortion of connecting lines or
components. When connecting the flexible hose con­
nections it is important that the swagged fitting and
the flare nut, as well as the coupling to which it is
attached, be held at the same time using three dif­
ferent wrenches to prevent turning the fitting and
damaging the ground seat.
• "O" rings and seats must be in perfect condition.
The slightest burr or piece of dirt may cause a leak.
• Sealing beads on hose clamp connections must be
free of nicks and scratches to assure a perfect seal.
H. P. POWER ELEMENT
The use
CHEVROLET TRUCK SERVICE M ANUAL