Service manual

Section 8 Refrigeration
8-3
Charging Procedures
IMPORTANT
The charge is critical on all Reach-In units. Use a
scale or a charging cylinder to ensure the proper
charge is installed.
1. Be sure the Main ON/OFF toggle switch is in
the OFF position.
2. Close the vacuum pump valve, the low side
service valve, and the low side manifold gauge
valve.
3. Open the high side manifold gauge valve and
the high side service valve.
4. Open the charging cylinder and add the proper
refrigerant charge (shown on nameplate)
through the discharge service valve.
5. Let the system “settle” for 2 to 3 minutes.
6. Place the main ON/OFF toggle switch in the ON
position.
7. Close the high side valve on the manifold gauge
set. Add any remaining vapor charge through
the suction service valve (if necessary).
NOTE: Manifold gauges must be removed properly
to ensure that no refrigerant contamination or loss
occurs.
8. Make sure that all the vapor in the charging
hoses is drawn into the Reach-In before
disconnecting the charging hoses.
a) Run the Reach-In cooling mode.
b) Close the high side service valve at the
Reach-In.
c) Open the low side service valve at the
Reach-In.
d) Open the high and low side valves on the
manifold gauge set. Any refrigerant in the lines
will be pulled into the low side of the system.
e) Allow the pressures to equalize while the
Reach-In is running.
f) Close the low side service valve at the
Reach-In.
g) Remove the hoses from the Reach-In and
install the caps.