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Startup Procedure
Using the startup log on the following pages, establish
nominal conditions for consistent measurements as
follows:
•
Leaving air greater than 60°F
•
Entering air temperature = 70 to 90°F
•
Entering water temperature > 60°F
With all compressors running at full load:
1. Compute superheat from the suction line pressure
and temperature at the compressor on each circuit.
Adjust the thermal expansion valve settings if
necessary. Superheat should be between 14 and
20°F.
2. Inspect refrigerant flow in the liquid line sight glass.
Flow should be smooth and even, with no bubbles
once the system has stabilized.
Unit:
Unit Location:
Unit Voltage
Evaporator fan motor horsepower:
Evaporator fan motor amps:
Evaporator fan rpm (actual):
Evaporator system static (from test and
balance report or actual readings)
Evaporator system cfm (test and balance
sheet or actual tested):
Dry-bulb °F:
Wet-bulb °F:
Circuit
Compressor Amp Draw
A
Circuit A
Circuit B
Circuit C
Circuit D
Circuit E
Circuit F
(a)
Air-Cooled only
SCXF-SVX01Q-EN
Supply duct static:
Evaporator Air Conditioners (with all compressor operating)
Entering
Suction
pressure,
B
(a)
psig
N N o o t t e e : : Sight glass moisture indicator may show
caution or wet at startup. May need up to 12
hours of operation for system to reach
equilibrium and correctly show moisture.
Normal startup will occur provided that Tracer™
Summit is not controlling the module outputs or the
generic BAS is not keeping the unit off. To prevent
Tracer Summit from affecting unit operation, remove
Tracer wiring and make required changes to setpoint
and sensor sources.
Operating & Programming Instructions
See Self-Contained Programming Guide, PKG-SVP01*-
EN, for available unit operating setpoints and
instructions. A copy ships with each unit. For units with
VFD option, see installer guide that ships with each
VFD.
Startup Log
Evaporator
Dry-bulb °F:
Wet-bulb °F:
Discharge
Superheat
pressure,
psig
Return duct static:
Leaving
Liquid line
Sub cooling
pressure,
psig
S S t t a a r r t t u u p p
°F
83
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