(Mar, 2012)
Compact CWE Series Installation, Operation & Maintenance Manual
Air Technology Systems, Inc.
2-7
2.6.4 Remote Display
As an option, a factory supplied controller display
may be remotely mounted. For mounting and wiring
instructions, refer to the system drawings and the
supplemental manual sent in the data package with
your unit.
2.6.5 Condensate Pump
An optional, factory installed condensate pump may
be provided for automatically eliminating condensate
and humidifi er fl ush water from the drain pan. The
condensate pump is typically installed by the factory
inside the A/C unit. If an optional, fi eld 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.
2.6.6 Remote Temperature/Humidity Sensor
The remote temperature/humidity (T/H) sensor must
be located so that it will properly sense the tempera-
ture/humidity conditions to be controlled. Depending
on the type of control selected (see Section 2.6.6.1),
the sensor may be factory mounted or shipped loose
for fi eld 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 may be provided by
SATS. Follow the steps below to mount the sensor.
Temperature /Humidity Sensor
1. Remove the cover from the base of the sensor
by squeezing it at the top and bottom.
CAUTION
Take care not to damage the exposed tem-
perature/humidity sensors on the PC board
when the cover is removed. The sensors can
be damaged if handled improperly.
2. Place the base temporarily against the mounting
surface.
3. Level the base. Mark and drill mounting holes
through at least two of the available slotted holes.
4. Run a 3 conductor shielded cable through the
opening in the base, then secure the base with
screws ensuring the word TOP on the PC board
is oriented upward.
5. Make the wiring connections. Refer to Section
2.8, Utility Connections and refer to the wiring
diagram supplied with your unit.
6. Seal the hole in the wall behind the sensor.
7. Replace the cover plate on the base.
CAUTION
The sensor can be damaged if handled
improperly. Take care not to damage the
exposed temperature/humidity sensor on the
PC board. Do not touch the sensor as this will
affect its accuracy.
2.6.6.1 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.
Figure 15- Temperature/Humidity Sensor Location
HEIGHT > 60"
T/H SENSOR FOR
RETURN AIR
T/H SENSOR FOR
ROOM AIR
SUPPLY AIR
T/H SENSOR
FOR SUPPLY AIR
As an alternative to locating the T/H sensor inside
the A/C unit, it may be fi eld installed under a raised
fl oor for sensing supply air conditions or, on a wall
in the conditioned space for sensing actual room
conditions.
