HEIGHT > 60
2.6.3
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 Section 2.7.3.2 for information on piping the
condensate pump.
2.6.4
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 Figure 13).
F
IGURE
13- T
EMPERATURE
/H
UMIDITY
S
ENSOR
L
OCATION
CyberAiR DX Floor Mounted IOM Manual
Supply Air Control- As an option, a field installed T/H
sensor may be used for supply air control. 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.
2.6.4.1 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
Section 2.6.4), 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
may be provided by STULZ. Follow the steps below to
mount the sensor.
CONTROL CABLE
OPENING
WIR
E
TERMINAL
S
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
temperature/ 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. Also, mark through the large opening in
the base and drill a hole into the mounting
surface for a control cable to pass through the
back of the base.
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,
2-8
