JOHNSON CONTROLS
6
FORM 130.13-NOM8 (1021)
While viewing the damper from the discharge of the
equipment, disengage the actuator by depressing the
manual override button on the side of the actuator and
rotate the shaft fully. The damper should close fully and
there should be no gaps between the damper gasketing
and the inside of the valve.
Manually rotate the fan wheel to assure that there are
no obstructions within the fan housing.
Equipment supplied with EC motors,
backward or reverse rotation of the
blower is detrimental to the EC motor.
Fan must be energized prior to intro
-
duction of air through the primary
air valve or the possibilities exist that
the fan wheel will operate backwards
/ counter rotation.
SEQUENCE OF OPERATION
All series flow, fan-powered sensible cooling equipment
is supplied with a rectangular discharge and comes in
one of the following configurations:
1. Series flow with sensible cooling coil mounted on
the intake opening, and hot water coil mounted on
the discharge opening.
2. Series flow with sensible cooling coil mounted
on the intake opening, and electric heat rack as-
sembly installed into discharge duct, with flanged
discharge opening.
3. Series flow with sensible cooling coil mounted on
the intake opening, flanged discharge opening.
Series Flow
On series flow equipment, the fan runs continuously
whenever the central air handler is in operation, with
the unit controller ultimately determining unit operation.
Operational characteristics may vary depending on
control type (factory, field-provided, or consignment).
In response to the space temperature, the air valve
modulates the volume of primary air. The reheat is
typically off during the air valve’s modulation. Should
the space temperature decrease to the point at which
a decrease in primary air will not maintain the desired
temperature, the reheat will be activated to increase the
discharge air temperature.
INSTALLATION
Do not use airflow sensor, connecting
tubes, drip pan, drain, auxiliary drip
pan, coil stubouts or damper shaft as a
handle when lifting or moving equip
-
ment as damage may occur.
Do not handle by equipment’s heating
elements, as permanent damage will
occur.
Terminal equipment with electric heat must be installed
in a horizontal plane with respect to the air stream.
Clearances
Units with electric heat are ETL listed for 0.0” clearance
to combustibles. Refer to NEC and/or local codes for
minimum electrical clearances required for all other
service. Equipment should not make contact with any
structure located above or below the equipment without
appropriate isolation. Equipment supplied with top and/
or bottom access panels requires sufficient clearance
to remove access panels for service.
Hanging and Mounting Equipment Overhead
Johnson Controls strongly recommends that all
equipment be suspended from the upper most ceiling or
a structural element of the building, independent of the
false ceiling grid. Suspension devices are field supplied,
sized and designed by others. Johnson Controls will not
accept responsibility for equipment mounting supports.
Equipment must be installed in a level horizontal plane.
Failure to level equipment properly may prevent proper
operation of unit.
TCSC series flow, fan-powered sensible cooling VAV
units are supplied with integral hanger brackets for
use with (up to) a 3/8” [10mm] diameter hanger rod.
Use of the integrated hanger brackets is the preferred
method for hanging and mounting the unit. For optimal
unit stability and vibration isolation, hanger rods can be
routed through both the top and bottom integral hanger
brackets, and secured accordingly.
See submittal
drawings for hanger bracket locations.