Page 4 of 19
507388-03
Issue 2127
• 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 2 for guidance in assembly and mounting
using a wall sleeve.
• Make sure the gaskets attached to the sleeve are not
damaged.
• 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.
• Slide the unit into the sleeve. When properly nested,
the angle on top of the unit should line up with the top
flange of the sleeve and should almost touch. Fasten
the unit to the sleeve with five screws furnished with
the sleeve.
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
Evaporator Condensate Drain
Install the plastic drain tube (furnished) over the 5/8” O.D.
fitting in the center of the Evaporator condensate pan.
Connect other end of the drain tube to the open trap (see
Figure 1). The plastic drain connection is provided so that
it may be disconnected from the permanent drain tubing in
the building in the event it becomes necessary to remove
the cooling chassis assembly.
The drain line should pitch gradually downward at least 1”
per 10’ of horizontal run to the open drain trap.
Be certain that the plastic drain tube has free drainage and
is not crimped or flattened at any bend.
Figure 1. HWC Evaporator Condensate Drain
Installation
Drain Pan
Open Drain Trap
Return
Air Duct
To Open
Drain Trap
Alternative
Method
5/8
" I.D.
Plastic Tube
(Supplied)
Top of Drain Tube
Must be Below
Bottom of Drain Pan
Drain Tube - Pitch 1"
for every 10 ft.
(Field Supplied)
Figure 2. HWC Installation
Plywood
28"
Min
.
Wall Sleeve
Vibration Isolating Material
FLOO
R
6 x 22 Minimum Opening
to Align with Return Air
Opening in Unit.
"
"