Name: Johnson Controls York YCIV A Series
Brand: Johnson Controls
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JOHNSON CONTROLS

SECTION 5 - COMMISSIONING

FORM 201.23-NM2

ISSUE DATE: 3/9/2015

JOHNSON CONTROLS

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

eld. 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, ttings, 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 #: ______________________