Installation & Maintenance Manual Owner's manual

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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 National
Fuel Gas Code ANSI Z223.1-1999, or the latest
edition.
A heat loss study and a complete layout of the system
should be made first.
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
specifications).
*See figures 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 reflected 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 main-
tained 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
fire.
Power Vent Units required 36"
clearance above top of unit.