T a b l e 4-2. Conversion of temperature to pressure (R-22)

TM 5-4120-356-14

T a b l e 4-2. Conversion of temperature to pressure (R-22)

(h) Calculate Superheat of expansion valve deducting tempera-

t u r e calculated in step (g) from the temperature indicated on the thermometer attached

to the suction line. Superheat of the expansion valve should 6.0 1.5 F ( - 1 4 . 4 4

0.8O C ).

( i ) I f s u p e r h e a t o f t h e e x p a n s i o n v a l v e is not correct, as given in

step (g), refer to step (3) and adjust the expansion valve to the correct superheat.

(j) If superheat of expansion valve is correct, proceed as follows:

( k ) Refer to paragraph 3-15b and remove the condenser fan.

(l) Refer to figure 4-12 and remove the thermometer b u l b

from

the

s u c t i o n line near the expansion valve power bulb.

(m) Refer to paragraph 3-15b and reinstall the condenser fan.

(n) Refer to figure 4-5 and remove the suction pressure gage.

(3) A d j u s t .

CAUTION

N e v e r adjust the expansion v a l v e u n l e s s

a b s o l u t e l y necessary. When a d j u s t i n g the

e x p a n s i o n valve, allow the u n i t to run on

"COOL" at least 20 minutes between each

adjustment. Make sure that t h e condenser

f a n and all panels are in place and secure

d u r i n g running period.