Delfield Specification Line GA Series, Original Instructions Service Manual

Page: 57 / 104

Part Number GA_SM 08/18 57
R290
Important
We assume no responsibility for the use of contaminated
refrigerant. Damage resulting from the use of
contaminated refrigerant is the sole responsibility of the
servicing company.
Connections
1. Suction side of the compressor through the suction
service valve.
2. Discharge side of the compressor through the
discharge service valve.
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. Disconnect power to the unit.
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. Connect power up the unit.
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.
Section 8
Refrigeration