Titus T3SQ-2 IOM - Manual (Page 5)

Note: This IOM is meant to demonstrate general dimensions of this product. The drawings on this IOM are not meant to detail every aspect of the product with exactness. Drawings are not to scale.
TITUS reserves the right to make changes without written notice.
T3SQ-2-IOM-5.0 4-11-11
Optional Inlet Heater Operation
The optional SCR controlled inlet electric heater is mounted in the neck of
the T
3
SQ-2 diffuser. (Line voltage must be supplied to the electric heaters.)
If the inlet heater is used with the T
3
SQ-2, all wiring will still be connected
through the wiring interface box on the backpan of the diffuser. As shown
on the diagram below, there is only 1 additional component (heater
interface adapter fig. 8) and 1 additional cable (blue RJ-45). The power
wiring to the heater has to be connected by removing the face from the
wiring interface board enclosure per Figure 7. The wires must be routed
through the grommets, connected to L & N, and then re-attach the face of
the enclosure. Using the heater interface adapter in figure 8, attach the
gray ribbon cable to the adapter using the extra black connector on the
ribbon cable. On the opposite end of the heater interface adapter, the blue
RJ-45 cable is needed to connect to the RJ-45 port on the heater interface
board.
The controller / thermostat will energize the inlet heater when the zone
temperature is 1
o F below setpoint. The SCR heater controller will modulate
a time pulsed signal from minimum output to full output over a 2 o F
temperature range. At 3
o
F over setpoint the heater will be at full output.
An airflow switch and two thermal cutouts protect the heater from operation
without airflow or at temperatures above 200
o
F.
Figure 6. Optional Inlet Heater
Figure 7. Optional Inlet Heater Wiring
Figure 8. Heater Interface Adapter
Figure 9. Wiring Pictorial
Heater Interface
Adapter
Plaque mounted
controller
Blue RJ-45 cable
Gray Ribbon Cable
Interface box (located on
the backpan)
4-pin interconnect cable
Single Phase
Power Supply
Heater Interface
board