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98618/035-20009-001
Rev. B (1205)
CATEGORY
1 - 450 R MAX. VENT TEMR The venting system must be
installed in accordance
with Section 5.3,Air for Combustion
and Ventila-
tion, of the National Fuel Gas Code Z223.1/NFPA
54 (latest edition), or
Sections 7.2, 7.3 or 7.4 of CAN/CGA B149.1-00, National Gas and Pro-
pane Codes (latest edition) or applicable provisions of the local building
code and these instructions.
The furnace shall not be connected to any
chimney,
a flue
serving
a separate
appliance,
or any
appliance
designed to burn solid fuel. The furnace rating plate lists the maximum
vent gas temperature.
It is recommended
that the appliance is installed in a location where the
space temperature is 32 °F (0°C) or higher. If the appliance is installed
in a location where the ambient temperature
is below 32 °F (0°C), the
flue products could condense
causing damage to the appliance
heat
exchanger and!or the Roof Jack.
IMPORTANT:
The "VENT SYSTEM"
must be installed as specified
in
these
instructions
for
Manufactured
(Mobile)
Home
and Modular
Homes. This appliance must be vented with an approved roof jack and
cannot be common vented with another gas appliance.
EXTERIOR
ROOF
JACK
EXTENSION
Application
Exterior Roof Jack Extension is for use with the 4000 Series Roof Jack.
Available to comply with instances in which the roof jack crown needs to
be raised to meet a roof clearance
requirement.
One extension will
raise the roof jack crown by 18 inches.
CROWN
Remove
the 2 screws
that secure the upper cap
to the crown assembly
base and remove the
upper cap. Next, remove the 3 screws
that secure
the lower cap to the crown assembly
base.
Set
both caps aside for later use.
STEP 3 : Reinstall
Upper & Lower Cap to
Extension.
UPPER
CAP
LOWER
CAP
EXTENSION
BRACKET
EXTENSION
CROWN
ASSEMBLY
BASE
Using the 3 screws
removed
in step 3, attach the lower
cap to the extension
bracket.
Install the upper cap over
the center
pipe of the extension.
Using the 2 holes
located
at the base of the upper cap as guides,
drill 2
holes 1/8" diameter
into the center
pipe.
Finally, attach
the upper cap to the center
pipe using the 2 screws
removed
in step 3 to the center
pipe.
STEP 2 : Install Extension.
EXTENSION
!_
°i
CROWN
BASE
i
Place the roof jack extension
on top of the crown
assembly
base, pushing
down firmly to assure a snug
fit.
IMPORTANT:
Make sure that the pipes are
connected.
Using the 4 holes at the base of the extension
as a guide,
drill 4 holes 1/8" diameter
into the crown assembly
base.
Secure
the extension
to the crown assembly
base with
the 4 screws
provided.
Install the lower cap on top of the
extension
so that the center
pipe sticks through
the hole
in the lower cap.
STEP 4 : Assembly
Complete.
Place these instructions
in the Customer
Envelope
provided
with the furnace.
FIGURE 16: Roof Jack
COMBUSTION
AND
VENTILATION
AIR
This furnace is a sealed combustion
(direct vent) unit and is design cer-
tified to use only a 4000 Series roof jack. These roof jacks are designed
to provide combustion air to the furnace and to exhaust flue products to
the outside. No other combustion air openings or ducts are needed.
Unitary Products Group
13
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