Talley UAC40-5/6-08, Technical Manual

Page: 187 / 353

TM5-4120-375-14
5-18.
CHARGING THE SYSTEM (cont.).
a. Place the refrigerant cylinder on a scale of sufficient capacity.
b .
c .
d .
Weigh the cylinder and record the weight.
Open the suction
service valve and slightly open the cylinder
shutoff valve. Gas refrigerant will be sucked into the refri-
g e r a t i o n s y s t e m r a p i d l y a t f i r s t , t h e n m o r e s l o w l y a s p r e s s u r e s
begin to equalize. W h e n p r e s s u r e s h a v e e q u a l i z e d o r 1 0 p o u n d s
(4.48 kg) of refrigerant gas have flowed into the refrigerant system,
close the suction service valve and the cylinder shutoff valve.
Check operation and top off refrigerant as necessary, in the
following manner:
CAUTION
If knocking or pounding is heard when starting the air conditioner,
shut down at once and release some refrigerant before attempting
a n o t h e r s t a r t .
NOTE
The vapor valve is not used on a two valve system.
NOTE
If a one valve cylinder is used invert the cylinder.