Water chillers and
air-water heat pumps
HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 12.122 H
42
CIATCooler LP
Control of the refrigerant load
- When starting the compressor(s), check the subcooling and
overheating and thus verify is the refrigerant load is appropriate to
the operation conditions.
R 410A
- If the refrigerant load is lower than required, the suction pressure
will be rather lower than normal, and overheating when suctioning
from the compressors will be high. This can cause an interruption
in operation due to activation of the refrigerant load safety device.
To adjust the refrigerant load, a schrader valve is built into the unit
on the liquid line.
If the refrigerant load is insuffi cient, the liquid sight glass (available
from the model 200) will not be clean and gas bubbles will appear
as foam. The liquid sight glass is accessed through the access panel
to the electric panel.
(*) “Circuit 2” only in models 640 to 960 (STD version) and 640 to
720 (HEE version).
Models 200 to 360 STD / Models 200 to 280 HEE
Models 420 to 960 STD / Models 320 to 720 HEE
Low-pressure schrader
valve (optional pressure
gauge connection)
High-pressure schrader
valve (optional pressure
gauge connection)
High-pressure
pressostat
Liquid sight
glass
Liquid sight glass
of circuit 2 (*)
Liquid sight glass
of circuit 1
Low-pressure schrader
valve of circuit 2 (*) (optional
pressure gauge connection)
Low-pressure schrader
valve of circuit 1 (optional
pressure gauge connection)
High-pressure schrader
valve of circuit 2 (*) (optional
pressure gauge connection)
High-pressure
pressostat
of circuit 2 (*)
High-pressure schrader
valve of circuit 1 (optional
pressure gauge connection)
High-pressure
pressostat
of circuit 1
Models 90 to 180 STD / Models 90 to 180 HEE
Low-pressure schrader
valve (optional pressure
gauge connection)
High-pressure schrader
valve (optional pressure
gauge connection)
Electric
panel
High-pressure
pressostat
Door
switch
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