Sterling ME - Manual (Page 6)

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Figure 5 - Manufacturer’s Recommended Service Clearances
Note: Recommended ceiling clearance 36"
(914mm) is to the top of the furnace venting
collar assembly.
MOUNTING ON FIELD FURNISHED SUPPORTS
Single, double, triple duct furnace models have base rails
which are suitable for mounting either directly on solid
planking or steel channels. (Refer to Figure 4).
Figure 4
INSTALLATION CLEARANCES
Minimum clearances to combustible material are shown
on the unit data plate. It is important that clearances
be maintained for servicing the unit, and that minimum
clearances are provided from the unit to combustible
material. Clearances around the fi eld installed optional
outside air hood (if unit is to be connected to one) must
be unobstructed. See Figure 5.
Every gas appliance should be located with respect
to building construction and other equipment so as to
permit access to the unit. Clearances between vertical
walls and the vertical sides of the heater should be
no less than 6 inches (152mm). Minimum clearance
between the top of the heater and the ceiling is 6 inches
(152mm). The minimum clearance from combustibles
to the bottom of the furnace is 6 inches (the distance
between the unit skid rail bottom and the furnace bottom
is approximately 7 inches (178mm) which meets this
6 inch clearance requirement to combustible materials).
The minimum clearance from combustibles to the fl ue
collector is 6 inches (152mm). Adequate clearance must
be maintained around all openings into the combustion
chamber. Adequate clearance should be planned for
the width of the unit to pull out the burner drawer. See
Figure 5 and Table #T4088-B, D.
A pilot burner plate is provided in the Duct Furnace
for easy access to the pilot burner and ignition
system without opening burner drawer compartment.
Accessibility is also provided for the safety switches
included with your unit without removal of jacketry. Refer
to the maintenance section and the Indoor Duct Furnace
manual for more information.
The unit should never be lifted by
furnace sections, blower housing/fi lter/sections,
motor mounts or fl ue connections. These are not
designed to support total weight of the unit, and
may break, causing personal injury or property
damage!
Make certain that the lifting
methods used to lift the Make-Up Air Unit are
capable of supporting the weight of the heater
during installation. Failure to heed this warning
may result in property damage or personal injury.
"C"
Support Must Clear
Return Air Opening
And Fit Inside Base
Rail Flange
Capacity
(CA) "C" Dim.
30-5/8"
(778)
41-5/8"
(1057)
52-5/8"
(1337)
58-1/8"
(1476)
10/15
20/25/50
30/35
60/70
40/80/12
AIR FLOW
Indoor
Make-Up
Unit
A
A
AIR FLOW
Clearance
For Drawer
Pull-Out
D8773