JOHNSON CONTROLS
49
SECTION 5 - COMMISSIONING
FORM 201.23-NM2
ISSUE DATE: 09/25/2020
5
JOHNSON CONTROLS
5
FORM 201.23-CL2
ISSUE DATE: 1/12/2015
Superheat
Example:
Suction Temp = 46°F (8°C)
minus Suction Press
30 PSIG converted to Temp - 35°F (1°C)
11°F (6°C)
The suction temperature should be taken 6" (13 mm) before
the compressor suction service valve, and the suction pres-
sure is taken at the compressor suction service valve.
No superheat adjustments are necessary and the electroni
-
cally controlled Drain Valve need not be adjusted in the
field. Ensure that superheat is controlling at 8 to 12°F (4.45
to 6.67°C). The purpose of this check is primarily to verify
the transducer and suction temperature sensors in a system
are providing reasonably accurate outputs to the chiller
controls. It also checks the operation of the Feed and Drain
Valves.
Record the suction temperature, suction pressure, suction
pressure converted to temperature, and superheat of each
system below:
SYS 1
SYS 2
Suction Press =
_____
_____
PSIG (kPa)
SP to Temp =
_____
_____
°F (°C)
Suction Temp = _____
_____
°F (°C)
Superheat =
_____
_____
°F (°C)
Discharge superheat will typically run approx. 28 to 30°F.
This can be checked on the micropanel display. If the suction
superheat drops very low or the economizer feeds liquid into
the compressor, the superheat will drop sharply to approx. 2
to 3°F.
Leak Checking
Leak check compressors, fittings, and piping to ensure no
leaks.
If the chiller is functioning satisfactorily during the initial op-
erating period, no safeties trip and the chiller controls chilled
liquid temperature; it is now ready to be placed into service.
JOB NAME: _____________________________
SALES ORDER #: ________________________
LOCATION: _____________________________
SOLD BY: ______________________________
INSTALLING
CONTRACTOR: _________________________
START-UP
TECHNICIAN/
COMPANY: _____________________________
START-UP DATE: ________________________
CHILLER MODEL #: ______________________
SERIAL #: ______________________________
COMPRESSOR #1
MODEL#: ______________________________
SERIAL #: ______________________________
COMPRESSOR #2
MODEL#: ______________________________
SERIAL #: ______________________________
COMPRESSOR #3
MODEL#: ______________________________
SERIAL #: ______________________________
COMPRESSOR #4
MODEL#: ______________________________
SERIAL #: ______________________________
Содержание YCIV Series
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