Reznor UDBS Unit Installation Manual - Manual (Page 28)

Form I-UDB, P/N 202658 R14, Page 28
8.2 DDC Controls, Options D10 and D14
If the heater was ordered with Option D10 or D14, it is equipped with a Novar Minio
control module. The Novar control with its accompanying relays and power transformer
are mounted in the control compartment of the unit. See FIGURE 19A. This control
offers a wide variety of input and output points that can be configured to meet a wide
range of building management applications. User-selectable input types are Thermis-
tor, 4-20 milliamp, 1-5 volts, or digital.
FIGURE 19A -
DDC Control with
Transformer and
Relays is Mounted on
a Specially Designed
Bracket in the Control
Compartment
Control Option D10 includes the controller and the sensor to be field mounted at the
heater discharge. Option D14 requires a field-supplied sensor that is compatible with
the control. For regulatory compliance specifications, and safety precautions, review
the control manufacturer’s installation instructions in the literature bag.
The recommended location for mounting the sensor is on the side of a field-installed
optional downturn nozzle. See FIGURE 19B for an illustration of the sensor included
with Option D10 and dimensions for mounting it on the nozzle side.
Center the
1” (25mm)
sensor hole
vertically on
the nozzle
side.
2-1/4”
(57mm)
2-1/4”
(57mm)
3”
(76mm)
9/16”
(14mm)
9/16”
(14mm)
Ø 1”
(25mm)
Nozzle flange
that connects
to the heater
outlet.
Ø (4) 1/8”
(3mm)
Before installing the
discharge nozzle, drill the
holes in the side panel as
illustrated.
Mount the sensor on the nozzle side.
Drill a 7/8” hole in the cabinet top above the controller and install the bushing supplied
with the unit for running the sensor wire. Sensor wire is field-supplied. Wire the sensor
to the controller as illustrated on the heater wiring diagram.
FIGURE 19B - Recommended Location
for Mounting the Sensor is on the Side
Panel of a Discharge Nozzle (Option CD
2, 3, or 4)
8.0 Controls and
Operation
(cont’d)
Sensor
DDC Control