JOHNSON CONTROLS
28
FORM 145.05-SU7
ISSUE DATE: 10/31/2019
SECTION 3 - PRE START-UP CHECKLIST
TO VERIFY CONDENSER ACTUATOR/VALVE
OPERATION:
1. Push the SERVICE key, scroll left for the Analog
Output section.
2. Scroll down and select Condenser Valve.
3. Change to 100%. This selection provides 2VDC
to fully open the valve.
4. Visually verify that the valve has opened 100%.
5. Change to 0%. This selection provides 10VDC to
fully close the valve.
6. Visually verify that the valve has closed com-
pletely.
7. If the valve fails to open or close correctly, make
adjustments to the actuator.
TO VERIFY ECONOMIZER ACTUATOR/VALVE
OPERATION:
1. Push the SERVICE key, scroll left for the Analog
Output section.
2. Scroll down and select Economizer Valve.
3. Change to 100%. This selection provides 10VDC
to fully open the valve.
4. Visually verify that the valve has opened 100%.
5. Change to 0%. This selection provides 2VDC to
fully close the valve.
6. Visually verify that the valve has closed com-
pletely.
7. If the valve fails to open or close correctly make
adjustments to the actuator.
EMERGENCY SHUTDOWN
Wire a field installed safety device into the SD com-
mand terminal that shuts the unit down in the event of
a fire, smoke, or any other emergency occurrence.
The terminal is located on the CTB1 terminal strip.
When 24vac is removed, the unit shutdowns and does
not operate until 24vac is reapplied to the SD termi-
nal. Removing the wire from the SD terminal allows
any external normally closed switch safety devices to
be installed in series and return power back to the SD
terminal. When 24vac is missing from the SD termi-
nal the UNIT-OVERALL STATUS displays LOCAL
STOP.
OCCUPIED COMMAND
When the rocker switch is in the ON position 24vac is
provided to OCC on the CTB1 terminal strip. When
the rocker is set to AUTO or OFF the 24vac is re-
moved. You can provide a hardwired 24vac signal to
OCC, a BAS communicated signal, or use the internal
time clock to provide a Occupied command. The unit
does not start without an Occupied command.
ALARM OUTPUTS
Field Wiring
The Primary Unit Controller has the ability to close
three sets of dry contacts as a means for the customer
to identify the presence of an alarm. In order to iden-
tify when an alarm is present, connect the external de-
vice terminals 7 and 8 (ALARM) of the CTB1 termi-
nal block.
PUMP OUTPUT
Field Wiring
The Primary Unit Controller has the ability to close
three sets of dry contacts, which can be used to en-
ergize the condenser water control pump. To use this
feature, connect to terminals 11 and 12 (PUMP AUX
1) of the CTB1 terminal block.
VAV HEAT
Field Wiring
The Primary Unit Controller can close a set of dry con-
tacts to command the VAV boxes to full open during
morning warm up operation. To use this feature, con-
nect to terminals 5 and 6 (VAVOPEN) of the CTB1
terminal block.
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