12
Low leak intake dampers to prevent cold air from settling in the equipment during
the off cycle.
Low temperature safety stat(s) to force the equipment to a “safe” condition if the
temperature downstream of the first coil drops below a set point for a given
amount of time. This safe condition typically involves shutting down the airflow
and opening the modulating valves. If the valve control is provided by others and
Titan Air supplies a freezestat, only the blower function will be limited by our
freezestat. The field installer must ensure that the valve opens on loss of power,
opens when the freezestat is tripped, and opens when needed during the off cycle
to keep the cabinet warm enough to prevent freeze-up.
DISCHARGE TEMPERATURE SENSOR BULB INSTALLATION & WIRING
The installing contractor may be responsible for field installation of the discharge temperature
sensor. Install discharge temp sensor at least five duct diameters away from the equipment
discharge to provide ample mixing of tempered air. Field installation of the discharge temperature
sensor in the discharge ductwork results in a better measurement of the average supply air
temperature.
Utilize shielded cable for field installed discharge sensor wiring
.
FIELD WIRING
Most equipment will require field wiring. Typically, field wiring is limited to power supply wiring,
remote panel wiring, and intake or discharge damper wiring. Occasionally, additional sensor wiring
may be required.
Carefully review the schematic and associated schematic symbol legend. Note that legend may
be on the parts/legend sheet rather than on the schematic.
If an intake or discharge damper was ordered as a loose accessory, it will have to be mounted
as specified in the Damper Installation Instructions found on page 22 and the actuator must be
wired. The remote panel must be mounted in a convenient location and wired to the equipment.
Interlocks between the exhaust, equipment and possibly spray booth will have to be connected by
field wiring.
Low voltage wiring (terminals 100+) must be run in separate conduit or in shielded cables to
prevent noise from affecting the control signals. Additionally, good practice calls for all DC voltage
(sensor and control signals) to be shielded or run separate from 24 VAC control wiring.
Typically, remote control panel wiring will sourced from a listed Class 2 transformer. Therefore,
most installations can take advantage of the opportunity to utilize less expensive wiring methods
documented in NEC Article 725.
Communication wiring (for DDC control systems) should be wired per DDC manufacturer’s
recommendations.
NOTE: All field wiring must conform to N.E.C. and/or any state or local codes.
POST INSTALLATION
Most of the equipment will likely be under a negative pressure when the blower is operating. Dirt
and moisture can be drawn into the equipment. Check for water in outdoor equipment after
operation during a rain shower.
Sealing integrity should be rechecked on a yearly basis.
NOTICE: Water damaged parts are not covered by Titan Air’s warranty
