CIRCUIT A
Compressor:
_______ L1
amps
_______ L2
amps
_______ L3
amps
_______ Crankcase
Heater
Superheat
_______Deg.
F.
Should be between 8º and 12ºF.
Subcooling
_______Deg.
F.
Should be between 12º and 18ºF.
Discharge Pressure
________ PSIG
Discharge Line Temperature
_______Deg. F.
Suction Line Pressure
________ PSIG
Suction Line Temperature
_______Deg. F.
Moisture Indicating Sight Glass located on copper
tube liquid line
Bubbles Visible
Yes / No
If bubbles are visible in sight glass, stop the start-up
process. Refrigerant charge may not be adequate.
Consult factory
.
Color of Center Dot
Green / Yellow
Hot Gas Bypass Operational
Yes / No
(Not present on digital scroll compressors)
CIRCUIT B - if present
Compressor:
_______ L1
amps
_______ L2
amps
_______ L3
amps
_______ Crankcase
Heater
Superheat
_______Deg.
F.
Should be between 8º and 12ºF.
Subcooling
_______Deg.
F.
Should be between 12º and 18ºF.
Discharge Pressure
________ PSIG
Discharge Line Temperature
_______Deg. F.
Suction Line Pressure
________ PSIG
Suction Line Temperature
_______Deg. F.
Moisture Indicating Sight Glass located on copper
tube liquid line
Bubbles Visible
Yes / No
If bubbles are visible in sight glass, stop the start-up
process. Refrigerant charge may not be adequate.
Consult factory
.
Color of Center Dot
Green / Yellow
Hot Gas Bypass Operational
Yes / No
(Not present on digital scroll compressors)
NOTE
Refrigeration System Start-Up Checklist must be
performed by a Qualified Refrigeration Technician.
If a digital scroll compressor is installed in the unit,
make certain that all current readings are taken
when compressors are running under load. See the
Digital Scroll Compressors
section in this manual
for further information.
Start-Up Checklist
(continued)
Outdoor Air Temperature
__________ Deg. F.
Wet Bulb Reading or Dew Point or Outdoor Air
Relative Humidity
(indicate which)
_________________
Condensing Fans
Each unit having DX is equipped with 2 or 3
condensing fans.
Condensing Fan 1:
_________ L1 amps
_________ L2 amps
_________ L3 amps
Condensing Fan 2:
_________ L1 amps
_________ L2 amps
_________ L3 amps
Condensing Fan 3:
if present
_________ L1 amps
_________ L2 amps
_________ L3 amps
Condensing Fan 4:
if present
_________ L1 amps
_________ L2 amps
_________ L3 amps
Compressors
Each DX unit is equipped with either one or two
compressors. Each compressor is part of a separate
refrigeration circuit.
24
Model MPX Make-Up Air Unit
Model XMPX Make-Up Air Unit
