Bulletin 30-015-003
Copyright © 2017 Unico Inc.
Page 4
All electrical wiring should be in accordance with
the latest edition of the National Electrical Code and
all local codes and regulations.
Condensate piping should be installed in accordance
with governing code.
Always install a secondary drain pan when an
overflow of condensate could cause damage.
Options.
An electric duct heater is another option that
is available to add additional features or to simplify
installation. Please refer to the latest Unico Catalog for
information on this and other options.
Temperature Limitations
The fan coil unit will operate properly under normal
air conditioning and heating temperature conditions.
However, there is a possibility that ice could form
inside the unit under unusual conditions.
For refrigerant systems, the anti-frost switch provides
some protection against frosting. It is not complete
protection however. To prevent coil frosting, avoid
low return air temperature below 65°F, low airflow
below
200
CFM/nominal
ton,
low
outdoor
temperatures below 65°F, and especially all of these
together.
Special care must be made when using water coils. The
hot water coil is affected by the refrigerant coil so it is
very important to verify that the air temperature
leaving the refrigerant coil is always greater than 32°F.
If not, or if unsure, install an averaging air temperature
thermostat on the front of the hot water coil to
automatically shut down the system should the air
entering the hot water coil fall below 35°F. The same
must be done if bringing in fresh outside air that could
be below freezing.
Unpacking
All units are inspected prior to shipping and are
carefully packaged in individual cartons. Inspect all
cartons prior to unpacking. Notify carrier of any
damage.
Lift up carton over the unit to reveal the unit. Inspect
unit for visible signs of concealed damage and notify
carrier of any such damage. All materials are sold FOB
Factory and it is the responsibility of the consignee to
file any claims with the delivering carrier for materials
received in a damaged condition. Remove the control
box from its carton sent inside the Vertical AHU
carton. The expansion valve is shipped loose and is
located in a separate Spare Parts box.
MOUNTING
There is no assembly or mounting required. The unit
comes factory ready for vertical airflow applications
(see Figure 1).
IL00535b.cvx
Heating and Cooling
Blower Cabinet
+ Hot water Coil
+ Cooling Coil
Vertical
Up-
Flow
Heating Only
Blower Cabinet
+ Hot Water Coil
Cooling Only
Blower Cabinet
+ Cooling Coil
Figure 1 Unit Arrangement
