JOHNSON CONTROLS
16
FORM 50.40-OM1 (713)
ISSUE DATE: 07/17/2013
SECTION 2 - OPERATION
Set the valves and pumps as shown in the first column
of Table 6 on page 16. Start the RSR unit by switch-
ing the toggle switch on the control box to the ON po-
sition.
When the RSR unit is started, the compressor reduces
the pressure in the storage vessel. The discharge side
of the compressor pressurizes the refrigeration unit
through the connection to the condenser. The resulting
pressure differ ential forces the liquid refrigerant from
the refrigeration unit into the RSR storage vessel.
The transfer of liquid is complete when the level in
the RSR storage vessel, as observed through the sight
glasses, ceases to rise. Close valve 5 and move the
RSR toggle switch to the OFF position. Proceed to the
Gas Pump Out.
TABLE 6 - OPERATION SETTINGS
CONTROL
1 2 3 4 5
TO REMOVE
LIQUID
FROM CHILLER
TO REMOVE
GAS FROM
CHILLER
TO REMOVE
OIL FROM
RERIGERANT
TO RECHARGE CHILLER
STEP 1 – GAS
OFF
STEP 2 – LIQUID
CHARGE
RSR SYSTEM
Valve 1 Open Closed Open
Open
1 & 4
or
2 & 3
Closed
Valve 2 Closed Open Closed Open
Valve 3 Open Closed Open Closed
Valve 4 Closed Open Closed Open
Valve 5 Open Closed Closed Closed Open
Compressor On On On Off On
Water to
Condenser
Off On Off Off On
Heater Off Off On Off On
CHILLER/AIR
CONDITIONER
Valve 6 Open Closed Closed Closed Open
Valve 7 Open Open Open Open Open
Chiller
Water Pump
Off On On
Either
One
On On
Condenser
Water Pump
Off Off On On On
When rst starting the vacuum pump on a
low pres sure system, the suction valve on
the pump should remain closed until the
pump comes up to operating temperature.
If refrigerant vapor is pumped through
the pump before the pump is warmed up,
a large quantity of refrigerant will dis-
solve in the oil. The dissolved refrigerant
will superheat and boil off violently as
the pump approaches its operating tem-
perature. Excessive oil loss will result.
Intake valve should be opened gradually
to prevent sudden refrigerant rush to the
pump and loss of oil from the pump.
The vacuum pump should never be exposed to a dis-
charge pressure higher then 30 PSIG.
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