MovinCool 24HFU Service Manual - Manual (Page 47)

MOVINCOOL 24HFU / 24HFU-1 SERVICE PAGE 47
REPAIR - INSPECTION AND REPAIR OF REFRIGERANT SYSTEM
5-4-2. Removal of Gauge Manifold
(1) Crimp the pinch-off tube with a pinch-
off tool.
(2) Remove the gauge manifold and the
process tube fitting. Crush the end of
the pinch-off tube.
(3) Braze the end of the pinch-off tube.
(4) Ensure that a gas leak is not present
at the pinched off portion and the
brazed end.
■ Removal of Gauge Manifold
(3) Securely place the refrigerant cylinder
on a scale with a weighing capacity of
70 lbs (30 kg) that is graduated by 0.2
oz (5 g).
(4) Open the high pressure valve of the
gauge manifold and the valve of the
refrigerant cylinder. Charge the
system with refrigerant to the specified
amount.
■ Charging with Refrigerant
Standard Amount of Refrigerant:
29.9 oz +0.7 oz (1.87 lbs) (850 g +20.0 g)
-0.0 -0.0
If the system cannot be charged with the
specified amount of refrigerant under this
condition, follow the steps below:
a) Close the high-pressure valve of
manifold.
b) Operate the refrigerant system.
c)
Slowly open the low-pressure
valve while observing the scale
reading.
d) When the scale reads the speci-
fied amount, immediately close
the low-pressure valve.
e) Bring the system to a stop.
CAUTION
The amount of refrigerant charged has a great
effect on the cooling capacity of the unit. Charge
to the specified amount, always observing the
scale graduations while charging.
(5) Close the high pressure valve of the
gauge manifold and the valve of the
refrigerant cylinder.