Sterling RT - Manual (Page 8)

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INSTALLATION
Figure 6 - Minimum Clearances to Combustible Material or Obstructions
Open all disconnect switches
and secure in that position before installing
unit. Failure to do so may result in personal
injury or death from electrical shock.
Installation must conform with local building codes,
or in the absence of local codes, with the latest
edition of the National Fuel Gas Code ANSI Z223.1
(NFPA 54).
A heat loss study and a complete layout of the system
should be made fi rst.
When locating the unit in its permanent location, make
certain that the roof is capable of carrying the additional
load of the equipment. Check the net weights from the
engineering data.
Make certain that clearances are provided for service,
minimum clearance to combustible material and to
venting cap. See below for this information. Service
clearance information is given in the engineering data
in Figures 1, 2 and 6. Clearances around secondary air
must be unobstructed.
If the unit is installed downstream of refrigeration coils,
condensate will form and collect in the bottom of the
heater. Drain connections are provided to dispose of
this condensate from the unit. Connect drain pipes to
dispose of this condensate where necessary.
Ducts which are outdoors must
be insulated and sealed to prevent water from
entering either furnace or building through duct
(see section on duct and drain specifi cations).
*
See fi gures 1 & 2 and charts 1 & 2. D3589
D3589A
18"
(457) 5/16"
(8)
Ductwork
Natural
(or Power)
Vent
Furnace
Air Flow
5/16"
(8)
18"
(457)
18"
(457)
36"
(914)
36"
(914)
Clearance
For Drawer
Pul-out
18"
(457)
5/16" (8) Typ.
Ducts connected to duct furnaces shall have removable
access panels on both upstream and downstream sides
of the unit. These openings shall be accessible when
the unit is installed in service, and shall be of such size
that smoke or refl ected light may be observed inside the
casing to indicate the presence of leaks in the heating
element. The covers for the openings shall be attached
in such a manner as to prevent leaks.
If a duct furnace is connected
to a return air duct or any other inlet air
restriction, the appliance shall be installed on
the positive pressure side of the air-circulating
blower.
Atmospheres containing solvents or chlorinated
hydrocarbons will produce corrosive acids when
coming in contact with the flames. This will greatly
reduce the life of the gas duct furnace and may void
the warranty. Avoid such areas.
CLEARANCES
Minimum clearances are shown in Figures 1, 2 & 6
and charts 1 & 2. It is important that clearances be
maintained for servicing the unit (refer to Figures 1
& 2 for clearances necessary to pull out the burner
drawer for servicing), and that minimum clearances are
provided from combustible material and from the venting
cap/top of unit. Clearances around the outside air hood
must be unobstructed.
Provide adequate clearance from
combustibles to prevent injury or death from
fi re.
Power Vent Units required 36"
clearance above top of unit.