Allied Air Enterprises 506271-01 - Manual (Page 3)

506271-01 Page 3 of 14 Issue 0921
In the U.S., units may be installed on combustible floors
made from wood or class A, B, or C roof covering material.
In Canada, units may be installed on combustible floors.
Units must be installed outdoors.
Service Access
Access to all serviceable components is provided by four
removable panels: blower compartment, evoporator coil/filter
compartment, burner compartment, and main control box.
Combustion Discharge
The vent outlet must be installed in a location as to prevent
building degradation and must be consistent with the National
Fuel Gas Code, Z223.1 or CAN/CGA-B149.1 & .2.
The products of combustion are discharged through a
screened opening on the gas heat side panel. The horizontal
vent system shall terminate at least 4' below, 4' horizontally
from, or 1' above any door, window, or gravity air inlet into the
building. The vent system shall terminate at least 3' above
any forced air inlet located within 10'.
The unit shall be installed in a manner such that snow
accumulation will not restrict the flow of flue products.
Clearances
All units require certain clearances for proper operation and
service. Refer to Table 2 for the minimum clearances to
combustibles required for construction, servicing, and proper
unit operation.
Clearance to combustibles below the unit flue is 10" since
the flue points down.
Do not permit overhanging structures or shrubs to
obstruct condenser air discharge outlet, combustion air
inlet, or vent outlet.
Before lifting a unit, make sure that the weight is distributed
equally on the cables so that it will lift evenly.
CAUTION
Exercise care when moving the unit. Do not remove any
packaging until the unit is near the place of installation. An
accessory lift kit can be purchased to aid in rigging. Spreaders
whose length exceed the largest dimension across the unit
must be used across the top of the unit.
Units may also be moved or lifted with a forklift while still in
the factory supplied packaging. The lengths of the forks
of the forklift must be a minimum of 42".
Roof Curb Installation
If a roof curb is used, follow the manufacturer’s Installation
Instructions and be sure that all required clearances are
observed (see Clearances section on this page).
This unit is shipped with four corner brackets in place on the
underside of the unit (see Figure 1). All four brackets must
be removed before unit is installed onto roof curb
assembly.
To avoid interference with roof curb remove the outer most
screw attaching the outdoor coil filler panel to the unit base,
and calk the open hole.
Corner Brackets
Figure 1
Coil Close
Off
Bracket Bracket
Bracket Bracket
Remove all four (4) corner brackets before installing on roof curb.
Return Supply
Table 1
Minimum Clearances to Combustibles
* Minimum clearance to combustible material below the flue
is 10" to allow proper dissipation of flue gasses and
temperatures.
Front of Unit 24”
Back of Unit 2”
Left Side 12”
Right Side
(from Vent Cover)
15”
Below Unit * 0”