Figure 3.
All CeilAir TR-OHS-032-AR (access panels removed)
Overview
8
AH-SVX008C-EN
Coil(s)
The cooling and optional hot water reheating coils are
aluminum finned/copper tube construction. The coils are
leak tested and cleaned before installation at the factory.
Blower
The unit is equipped with a centrifugal blower with
forward curved blades. The blower is contained in a
double-width, double-inlet housing. The blower is
dynamically and statically balanced to minimize vibration.
The blower motor is ODP industrial duty and utilizes
permanently lubricated ball bearings.
Smaller CeilAir units (models TR-OHS-012/040) use direct
drive blowers (except "H"-series models air configured for
horizontal discharge). Larger units (models TR-OHS-048/
120) and horizontal discharge units (models TR-OHS-012/
040-H), use a belt-driven blower. The belt-driven blower
motor is mounted on an adjustable base for belt
tensioning and is furnished with an adjustable pitch
sheave to adjust blower speed (see
).
Temperature Sensor
As a standard for systems utilizing a wall mounted A-Tech
thermostat, the temperature sensor is built into the
thermostat for room air control. The sensor monitors the
room air conditions and provides input signal(s) to the
thermostat.
The thermostat manages the operation of the A/C unit
consistent with the setpoints entered.
As an option, the temperature sensor can be shipped loose
for field installation in the room to be conditioned. Refer to
the electrical drawing supplied with your unit for details
specific to your system.
Optional Equipment
Humidistat/Dehumidistat
As an option for systems employing an A-Tech 1.1 or A-
Tech 1.2 thermostat, a room mounted humidistat and/ or
dehumidistat can be shipped loose for field installation.
Each device has an adjustment dial on the front where the
operator selects the desired setpoint.
If an optional humidifier is selected, the humidistat is
included to control its operation. The humidistat controls
the humidifier's operation independently of the control
thermostat however, the blower must be on for the
humidifier to operate.
If the reheat option is selected, a dehumidistat is provided.
If room humidity rises above setpoint when the demand
for cooling is satisfied, the dehumidistat signals the
compressor to turn on, removing humidity. At the same
time, the heater(s) are turned on to offset the cooling
effect, thus maintaining the temperature of the space to be
conditioned. Refer to the electrical drawing supplied with
your unit for details specific to your system.
Temperature/Humidity Sensor
As a standard for systems that use the microprocessor
controller, a temperature/humidity (T/H) sensor is typically
factory mounted in the return air stream for room air
control. As an option, the T/H sensor may be shipped loose
for field installation. See
and the electrical drawing supplied with
your unit for details specific to your system.
Heaters
The TR-OHS unit may incorporate heaters for reheating
the supply air as required to offset the sensible cooling of
the system during the dehumidification cycle and for the
Summary of Contents for CeilAir CW
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