JOHNSON CONTROLS
124
FORM 150.67-NM2 (209)
Commissioning
4. Put the unit into Service Mode (as described under
the Control Service and Troubleshooting section)
and cycle each condenser fan to ensure proper
rotation.
5. Prior to this step, turn system 2 off (if applicable
–refer to Option 2 under “Unit Keys” section for
more information on system switches). Connect a
manifold gauge to system 1 suction and discharge
service valves.
Place the Unit Switch in the control panel to the
“ON” position. As each compressor cycles on,
ensure that the discharge pressure rises and the
suction pressure decreases. If this does not oc-
cur, the compressor being tested is operating in
the reverse direction and must be corrected. After
verifying proper compressor rotation, turn the
Unit Switch to “OFF.”
The chilled liquid setpoint may need
to be temporarily lowered to ensure
all compressors cycle “on.”
This unit uses scroll compressors
which can only operate in one direc-
tion. Failure to observe this will lead
to compressor failure.
6. YCAL0043 – YCAL0066 units only – Turn sys-
tem 1 “OFF” and system 2 “ON” (refer to Option
2 under “UNIT KEYS” section for more informa-
tion on system switches).
Place the Unit Switch in the control panel to the
“ON” position. As each compressor cycles “ON”,
ensure that the discharge pressure rises and the
suction pressure decreases. If this does not oc-
cur, the compressor being tested is operating in
the reverse direction and must be corrected. After
verifying proper compressor rotation, turn the
Unit Switch to “OFF”.
The chilled liquid setpoint may need
to be temporarily lowered to ensure all
compressors cycle “ON”.
OPTIONS
Display
Language
Sys 1 Switch
Sys 2 Switch
Chilled
Liquid
*
Ambient
Control
Local/Remote
Mode
Control
Mode
Display
Units
*
Lead/Lag
Control
*
Fan
Control
Manual
Override
Current
Feedback
** Soft Start
** Unit Type
** Refrigerant Type
** Expansion Valve Type
COOLING
SETPOINTS
Cooling
Setpoint
Range
EMS-PWM Max. Setpoint
PROGRAM
Discharge Pressure Cutout
Suct. Pressure Cutout
Low
Amb.
Temp.
Cutout
Leaving Liquid Temp. Cutout
Anti-Recycle
Time
Fan Control On Pressure
Fan Differential Off Pressure
Total # of Compressors
* Number of Fans/System
*
Unit/Sys
Voltage
Unit
ID
TABLE 9 –
* NOT ON ALL MODELS
** VIEWABLE ONLY
SETPOINTS ENTRY LIST
Summary of Contents for YCAL0019
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