(©July, 2008)
CeilAiR OHS Series Installation, Operation & Maintenance Manual
ir Technology Systems, Inc.
WARNING
This unit employs high voltage equipment with
rotating components. Exercise extreme care to
avoid accidents and ensure proper operation.
WARNING
Hazardous voltage will still be present inside the
electric box, even with the unit turned off at the
system controller. To isolate the unit for mainte-
nance, turn off power at the main power discon-
nect switch. Always disconnect main power prior
to performing any service or repairs.
WARNING
Refrigerant (R22 or R407C) is used with this
equipment. Death or serious injury may result if
personnel fail to observe proper safety precau-
tions. Great care must be exercised to prevent
contact of liquid refrigerant or refrigerant gas, dis-
charged under pressure, with any part of the
body. The extremely low temperature resulting
from the rapid expansion of liquid refrigerant or
pressurized gas can cause sudden and irrevers-
ible tissue damage.
As a minimum, all personnel should wear ther-
mal protective gloves and face-shield/goggles
when working with refrigerant. Application of ex-
cessive heat to any component will cause ex-
treme pressure and may result in a rupture.
Exposure of R22 to an open flame or a very hot
surface will cause a chemical reaction that will
form carbonyl chloride (hydrochloric/hydrofluo-
ric acid); a highly poisonous and corrosive gas
commonly referred to as PHOSGENE. In its
natural state, refrigerant is a colorless, odorless
vapor with no toxic characteristics. It is heavier
than air and will disperse rapidly in a well-venti-
lated area. In an unventilated area, it presents a
danger as a suffocant.
Always refer to the manufacturer’s MSDS pro-
vided with the unit.
1-5
WARNING
When performing soldering or desoldering op-
erations, make certain the refrigeration system
is fully recovered and purged and dry nitrogen is
flowing through the system at the rate of not
less than 1-2 CFM (0.028-0.57 M ³/minute).
CAUTION
Certain maintenance or cleaning procedures
may call for the use and handling of chemicals,
solvents, or cleansers. Always refer to the
manufacturer’s Material Safety Data Sheet
(MSDS) prior to using these materials. Clean
parts in a well-ventilated area. Avoid inhalation
of solvent fumes and prolonged exposure of skin
to cleaning solvents. Wash exposed skin thor-
oughly after contact with solvents.
CAUTION
When the air conditioner is in the cooling mode,
the return air-intake and discharge (supply)
must be free of obstructions. Ensure panels are
secure and latched into position.
CAUTION
Do not use cleaning solvents near open flame or
excessive heat. Wear eye protection when blow-
ing solvent from parts. The pressure-wash should
not exceed 30 psig. Solvent solutions should be
disposed of in accordance with local and state
regulatory statutes.
CAUTION
The unit must be kept in its normal installed po-
sition. If the unit is not kept level and horizontal,
damage to the compressor(s) will result.
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