Page 3 of 20
507389-02
Issue 1733
Use of Furnace as a Construction Heater
Allied Air does not recommended the use of these units
as a construction heater during any phase of construction.
Very low return air temperature, harmful vapors and
operation of the unit with clogged or misplaced filters will
damage the unit.
Units may be used for heating of buildings or structures
under construction, if the following conditions are met:
• The unit must be permanently installed per these
installation instructions.
• A room thermostat must control the furnace. The use
of fixed jumpers that will provide continuous heating is
not allowed.
• The return air duct must be provided and sealed to the
furnace.
• Return air temperature range between 60°F (16°C)
and 80°F (27°C) must be maintained.
•
Air filters must be installed in the system and must be
maintained during construction.
•
Air filters must be replaced upon construction
completion.
• The input rate and temperature rise must be set per
the furnace rating plate.
• One hundred percent (100%) outdoor air must be
provided for combustion air requirements during
construction.
• The furnace heat exchanger, components, duct
system, air filters and evaporator coils must be
thoroughly cleaned following final construction clean-
up.
• All furnace operating conditions (including ignition,
input rate, temperature rise and venting) must be
verified according to these installation instructions.
Installing with a Wall Sleeve
Refer to the installation instructions packed with the wall
sleeve and Figure 1 for guidance in assembly and mounting
using a wall sleeve.
Make sure the gaskets attached to the sleeve are not
damaged.
The sleeve is not intended as the sole support for the
unit. An additional support must be provided near the
return opening on the unit for adequate support. The
use of vibration isolation material between the unit and
the support is recommended.
CAUTION
Seal the space between the wall sleeve and the building
opening with non-hardening caulking compound. The seal
must be weather-tight to prevent entrance of moisture and
water into the building.
Assure that the unit is completely seated against the
gaskets on the wall sleeve.
Figure 1. HWC Installation
Plywood
28"
Mi
n.
Wall Sleeve
Vibration Isolating Material
FLOO
R
6 x 22 Minimum Opening
to Align with Return Air
Opening in Unit.
"
"
