DEZ
S
ERIES
1000
I
NSTALLATION
,
O
PERATION AND
M
AINTENANCE
M
ANUAL
8
installation drawing for the duct connection sizes and
locations.
NOTE:
A flow regulation damper is required but may
not be provided in the process air outlet. In such
cases, it is the responsibility of the contractor or the
owner to install a flow regulation damper. Adjust the
regulating dampers after all ductwork is installed.
Refer to section 3.6, “Monitoring Unit Performance,”
for more information concerning setting the correct
airflows. If the process airflow is not set correctly, unit
performance may be adversely affected. Refer to the
Unit Nameplate for the correct air volume
.
Ensure that inlets and outlets are free of obstructions
and filters are clean.
2.5 Utility Connections
High voltage is used in the
operation of this unit. Use the services of a
qualified electrician only to make the electrical
power connections.
1. Refer to the electrical drawing for the main
power connections.
2. Connect power to TB1 or the main disconnect
per the electrical drawing for this unit. See the
Unit Nameplate (mounted near the electrical
control box) for the operating power supply
requirements, minimum circuit ampacity (MCA)
and maximum fuse size (MFS).
2.6 Installing a Humidistat or Relative
Humidity Transmitter
A terminal block is provided for the connection of a
humidistat or temperature/RH sensor. Interconnecting
field wiring must be installed in accordance with NFPA
70 of the National Electrical Code (N.E.C.). Refer to
the electrical drawing for the electrical connections.
Wall-mounted control sensors should typically be
mounted 4–5 feet up from the floor in the conditioned
space (see Figure 3). The sensor must be located so
that it will properly sense the conditions to be
controlled. The sensor should not be mounted in an
open doorway or an area where it will be exposed to
direct sunlight.
Locate the sensor according to the application. To
control the conditions in a space, a wall mounted
sensor may be used in the space or a duct mounted
sensor may be located in the return air inlet duct if the
air is re-circulated. To control the air supplying a
process, a duct mounted sensor may be located in the
supply air duct near the process. Duct mounted
sensors cannot be used for D-Stat control but can be
used if the unit is configured for control schemes
where the process blower runs continuously such as
D-Stat II or H-Trac control (see section 3.4, Capacity
Control).
Figure 3 - Locating a Wall Mounted Control Sensor
Mount the sensor in the center of the
room where air circulation is good.
4-5 ft.
