CeilAir CW series Manuale dell'Operatore Scaricare il pdf (Pagina 11)

(©July, 2008)

CeilAiR OHS Series Installation, Operation & Maintenance Manual

ir Technology Systems, Inc.

1.6.5 Optional Equipment

1.6.5.1 Humidistat/Dehumidistat

As an option for systems utilizing an A-Tech 1.1 or A-

Tech 1.2 thermostat, a room mounted humidistat and/

or dehumidistat may be shipped loose for field installa-

tion. 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 it’s operation. The humidistat

controls the humidifier’s operation independant of the

control thermostat however, the blower must be on for

the humidifier to operate.

If the heat/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 compessor 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.

1.6.5.2 Temperature/Humidity Sensor

As a standard for systems utilizing C-Tech 10, A-Tech

20 or C6000 controllers, 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.

Refer to the electrical drawing supplied with your unit

for details specific to your system.

1.6.5.3 Heaters

The precision A/C unit may incorporate heaters for

reheating the supply air as required to offset the

sensible cooling of the system during the dehumidifi-

cation cycle and for the automatic heating mode.

Heaters are typically placed in the supply air stream

after the cooling coil to heat the supply air.

Nichrome wire electric resistance heating elements

may be factory installed in the supply airstream.

Electric heating elements are protected with line

fuses, thermal fuse links and over-temperature safety

switches which automatically reset.

As an option, hot water reheat may be selected for

sensible reheating during the dehumidification cycle. A

hot water heating coil may be factory installed in the

supply air stream. A valve is provided to control the

flow of hot water through the coil to maintain the

correct reheat temperature.

1-7

Hot Gas Reheat may be selected (for

CeilAiR

units

with DX cooling only) for automtic sensible reheating

during the dehumidification cycle. Hot compressor

discharge gas is diverted from the condenser to a hot

gas heating coil mounted in the supply air stream.

1.6.5.4 Humidifier

CeilAiR

systems may utilize an optional electrode

steam humidifier. The humidifier is factory installed

inside the air conditioner and includes fill and drain

valves and associated piping. Operation of the

humidifier’s fill and drain cycles is based on water

conductivity and is maintained by the humidifier

controller. An operating manual for the humidifier is

provided under separate cover. Refer to that manual for

detailed information on operation of the humidifier.

1.6.5.5 Condensate Pump

An optional factory installed condensate pump may be

provided. The pump automatically eliminates conden-

sate and humidifier flush water (if applicable) from the

drain pan. Should an overflow occur, an internal

overflow safety switch is wired to the system controller

to automatically shut down the precision A/C system.

1.6.5.6 Smoke Detector

Optionally mounted in the return air stream, a photo-

electric smoke detector is used to sense the presence

of smoke and signal the controller when a smoke

alarm condition exists and shuts down the air condi-

tioner.

1.6.5.7 Firestat

Optionally mounted in the return air stream, a fire

detector senses high retun air temperature and signals

the controller when a fire alarm condition exists and

shuts down the air conditioner.

1.6.5.8 Water Detector

As an option, SATS offers spot type or strip/cable type

water detectors. Upon sensing a water leak, the water

detector control circuit will signal the A/C system

controller of the alarm condition and shut down the air

conditioner’s water producing operation.

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CeilAir CW series Manuale dell'Operatore Pagina 11

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