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JOHNSON CONTROLS
79
FORM 150.62-NM8 (1020)
1
When adjusting the expansion valve (TXV only), the
adjusting screw should be turned not more than one
turn at a time, allowing sufficient time (approximately
15 minutes) between adjustments for the system and the
thermal expansion valve to respond and stabilize.
The EEV is non-adjustable. Superheat
setpoint is programmable from the
keypad.
Assure that superheat is set at a minimum of 10°F (5.56°C)
with a single compressor running on each circuit.
2. Record the suction temperature, suction pressure,
suction saturation temperature, and superheat of
each system below:
SYS 1 SYS 2
Suction temp = _______ _______ °F
Suction Pressure = _______ _______ psig
Saturation Temp = _______ _______ °F
Superheat = _______ _______ °F
Leak Checking
1. Leak check compressors, fittings, and piping to
ensure no leaks.
If the unit is functioning satisfactorily during the initial
operating period, no safeties trip and the compressors
cycle to control water temperature to setpoint, the chiller
is ready to be placed into operation.
Summary of Contents for YCAL0014E Series
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