210.100-IOM (JUL 2018)
Page 27
ACUAIR
®
HYGIENIC AIR UNITS
INSTALLATION
3.
Refrigerant Piping
– When a cooling coil is supplied, all
refrigeration piping must be installed in accordance with all
state and local codes and standard industry practices.
There must be sufficient flexibility in the piping so that any
vibration from the unit is not transmitted to the building
and so that the piping joints at the unit are not stressed.
All refrigeration lines must be secured to prevent wear or
vibration at all operating conditions.
4. Evaporator Coils
– Evaporator coils are designed and
tested to a designated maximum allowable operating pressure
(PSIG). It is the contractor’s and/or customer’s responsibility
to provide controls and reliefs within the refrigeration system
to prevent internal pressures from becoming higher than the
tested operating pressure.
CAUTION
Halocarbon refrigeration coils may not have been fully
evacuated or totally dried at the factory. It is the cus
-
tomer’s/contractor’s responsibility to provide adequate
evacuation of the evaporator coil and ensure that the
coil is dry and water free before start-up of the system.
5. Water or Brine Coils
– It is essential that the piping for
the system be done so that all lines can be drained and there
are no traps or pockets on the system where water or brine
can collect and freeze. All piping should be pitched away
from the unit coil. The piping should be installed in a manner
which will allow the coil to be filled with a solution to prevent
freezing, if necessary.
DUCT CONNECTIONS
(See Figures 33 and 34)
Make duct connections to the casing by screwing
flanged ducts
directly to the casing with self-tapping sheet metal screws.
Duct connections to collar-type openings can be made with
"S" cleats or overlapping joints.
Apply polyurethane caulking around the duct connection. It is
important to seal all duct connections to prevent air-leakage
and system performance problems.
It is recommended that all duct connections to the AcuAir unit
be insulated to minimize condensation.
CAULKING
SHEET METAL SCREW
DUCT
Figure 33 – Detail of Duct Connection
Figure 34 – Connection of Duct
Summary of Contents for AcuAir
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