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| ComPak
®
Series - Installation, Operation and Maintenance
Outside Air Temperature Sensor (Economizer Option Only) (4)
The outside air temperature sensor is installed only when the outside air economizer option is included.
The sensor is mounted inside a 1/2” PVC conduit pull elbow. It can be mounted to the outside of the building
using standard PVC conduit fittings. The sensor should be mounted near the outside air intake vent for the
economizer system. It is very important to mount the sensor so that it does not receive direct sunlight. The
exposure to sunlight will cause the sensor housing to warm, resulting in temperature readings that are higher
than the actual air temperature. This condition may prevent the CPCS-PCP from selecting the economizer mode
of operation. If possible, mount the sensor under an overhang or on a surface with a northern exposure.
Electrical connection should be made with 22 AWG, copper, 2-conductor, shielded, twisted-pair cable. Connect
the shield drain wire to ground at the ComPak® end only. See figure below for an illustration of the outside air
temperature sensor. Seal the conduit leading to the sensor with silicone caulk to prevent moisture from migrating
out to the sensor and condensing inside the sensor.
Figure 4-7. Outside Air Sensor
Air Cooled Condenser (Optional) (5)
The air-cooled condenser is used to reject heat recovered during the space cooling mode of operation. Only
ComPak® brand air-cooled condensers (PAC Units) should be used with a ComPak® Unit. The CPCS-PCP
provides 24 VAC control signal to the speed control located in the PAC unit control panel. The speed control
then runs the condenser fan motor at the appropriate speed. See figure below for an illustration of a PAC unit
field wiring.
Figure 4-8. PAC Unit Field Wiring
24 VAC CONTROL
SIGNAL FROM
USE COPPER SUPPLY WIRES
COMPAK
TERMINALS 12
AND 13
POWER SUPPLY
2
1
L1L2
GR
When economizer option is selected, adequate exhaust capacity via a separate fan must be specified
to ensure the natatorium pressure remains slightly negative. Failure to specify adequately sized exhaust
system may result in damage to structure and pool odors may be forced into other areas of the building.
!
WARNING
