JOHNSON CONTROLS
124
FORM 150.67-NM2
ISSUE DATE: 01/31/2019
SECTION 6 – COMMISSIONING
FORM 150.67-CL1
ISSUE DATE: 1/21/2015
C. PANEL CHECKS
(POWER ON - BOTH UNIT SWITCH OFF)
1. Apply 3-phase power and verify its value. Volt-
age imbalance should be no more than 2% of
the average voltage. ...........................................
2. Apply 120VAC and verify its value on the termi-
nal block in the Power Panel. Make the mea-
surement between terminals 5 and 2 of CTB2.
The voltage should be 120VAC +/- 10% ............
3. Program/verify the Cooling Setpoints, Program
Setpoints, and Unit Options. Record the values
below. .................................................................
OPTIONS
Display Language
Sys 1 Switch
Sys 2 Switch
Chilled Liquid
* Ambient Control
Local/Remote Mode
Control Mode
Display Mode
* 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
* Not on all models. ** Viewable only.
4. Put the unit into Service Mode and cycle each
condenser fan to ensure proper rotation. ...........
5. Prior to this main step, turn system 2 off. Con-
nect 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
occur, 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"
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 occur, 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" ................
This unit uses scroll compressors
which can only operate in one direc-
tion. Failure to observe this will lead
to compressor failure.
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