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Installation
Figure 19. Plenum Installation
Condensate Pump
An optional, factory installed condensate pump may be
provided for automatically eliminating condensate and
humidifier flush water from the drain pan. The condensate
pump is typically installed by the factory inside the A/C
unit. If an optional, field installed condensate pump is
selected, it should be located as near as possible to the air
conditioning system. The pump should be positioned so
the inlet hole in the pump is below the drain pan inside the
A/C unit. Secure the pump in place with a mounting clamp
or use an adhesive that's appropriate for the mounting
surface. Ensure that the pump is level for proper
operation.
See
"Condensate Pump," p. 26
the condensate pump.
Types of Control
Room Air Control (standard)- The A/C unit is provided with
a temperature and humidity (T/H) sensor, factory mounted
in the return air stream of the A/C unit. The return air
temperature and humidity are monitored by the system
controller and compared to limit values set at the factory.
Control outputs are based on set points entered into the
system controller by the user.
As an alternative to locating the T/H sensor inside the A/C
unit, it may be field installed under a raised floor for
sensing supply air conditions or, on a wall in the
conditioned space for sensing actual room conditions (see
the following figure).
22
PLENUM EXTENSION
for information on piping
Figure 20. Temperature/Humidity Sensor Location
T/H SENSOR
FOR SUPPLY AIR
Supply Air Monitoring- As an option, a field installed T/
H sensor may be used for supply air monitoring. The
sensor is equipped with a 20 foot long cable and is to be
field installed in the supply air stream. Position the sensor
at least 6 feet away from the supply air outlet. The supply
air temperature and humidity are monitored by the system
controller and compared to limit values set at the factory.
Control outputs are based on set points entered into the
system controller by the user.
Remote Temperature/Humidity Sensor
A remote temperature/humidity (T/H) sensor must be
located so that it will properly sense the temperature/
humidity conditions to be controlled (room air or supply
air). Depending on the type of control selected (see
of Control," p.
22), the sensor may be factory mounted or
shipped loose for field installation. The T/H sensor should
not be mounted near a doorway or an area where it would
be exposed to direct sunlight. When locating the sensor,
consider the length of wire to be used. As an option, a 75
foot or 150 foot long cable can be used. Follow the steps
below to mount the sensor.
Figure 21. Temperature/Humidity Sensor
CONTROL CABLE
OPENING
WIRE
TERMINALS
T/H SENSOR FOR
RETURN AIR
T/H SENSOR FOR
ROOM AIR
HEIGHT > 60 in.
SUPPLY AIR
"Types
SS-SVX002B-EN
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