SUBURBAN MANUFACTURING COMPANY
Post Office Box
399
Dayton, Tennessee
37321
DY
NATRAIL
INSTALLATION INSTRUCTIONS
FOR MODELS
CER~FIEO
NT-24SP NT-30SP NT-34SP
The design of the furnace has been certified for installation in recreational vehicles only. In order for the furnace to operate in conformity
with generally accepted safety regulations, the installation instructions must be followed. Failure
to
comply with the installation
instructions will void the warranty on the furnace and any responsibility on the part of Suburban Manufacturing Company.
The furnace was inspected before
it
leftthe factory. If any parts are found to be damged, do not install the furnace. Immediately contact
the transportation company and file a claim.
WARNING! Improper installation, adjustment, alteration, service or maintenance can
cause property damage, personal injury or loss of life. Refer to the installation
instructions
andlor owners manual provided with this appliance. Installation and service
must be performed by a qualified installer, service agency or the gas supplier.
INSTALLATION INSTRUCTIONS
I
manual.
In Canada, the furnace must be installed in accordance with.
WARNING!
of
this
appliancemust
be
made
in
accordance
with
the written instructions provided in this manual. No agent, representative
or employee of Suburban or other person has the authority to change,
modify or waive any provision of the instructions contained in this
CAUTION: If possible, do not install the furnace to where the vent can be
Standard
z240
-
covered or obstructed when any door on the trailer is opened. If this is not
2.
Standard
z240.6.2-M86
-
Electrical Requirements
for
possible, then the travel of the door must be restricted in order toprovide
Recreational Vehicles
a
6w
clearance
between
the
furnace
vent
and
any
door
whenever
3. Standard CANICSA 2240.4.2-M86
-
Installation Requirements for Propane
the door is open. NOTE: The exhaust temperature of this furnace could
Appliances and Equipment in Recreational Vehicles.
discolor or warp some materials. You should verify that the material used
4.
CAN/CGA
installation
'Odes.
on the coach door, panel, or cover will not discolor or warp from the exhaust
5.
applicable local
'Odes
and
regulations.
3. Furnace must be
electrically
grounded in accordance with the latest ed~tion
of the National
Electrical
Code ANSIINFPA No 70
Th~s unit is equlpped with an electric ignitor device that has an energy
consumption of
.l amp @12 volts D C.
temperature whenever any door, panel, or cover is in the open position.
Return Air
CAUTION: Due to the differences in vinyl siding, this appliance should not There are three methods described below for installing the furnace. Regardless
be installed on vinyl siding without first consulting with the manufacturer of of the method you choose, we require that a permanent opening be provided in
the siding or cutting the siding away from the area around the appliance the
interlorcabinetryof the coach directly in front of the furnace. The opening must
vent.
allow for free, unobstructed removal of the furnace. This opening may be used as
CAUTION: In any installation in which the vent of this appliance can be
covered due to the construction of the
RVor some special feature of the RV
such as slide out, pop-up, etc. always insure that the appliance cannot be
operated by setting the thermostat to the positive "OFF" position and
shutting off all electrical and gas supply to the appliance. Never operate
furnace with vent covered.
a means of providing circulating return air to the furnace.
other openings may be
used as well. The minimum return air to the furnace
must total 55 square inches
free area It is important that adequate return air be provided to assure normal
heating and operation of the furnace. Failure to provide the minimum return
airwill
cause erratic furnace cycling.
A. INSTALLATION DIRECTLY AGAINST OUTER
SKIN OF COACH
NOTE: These
furnaces must be installed and vented as described in this manual
(See Figure 1)
so that the negative pressure created by the air circulating (return air) fan cannot
affect the combustion air intake or
ventina of any other a~~liance. It is imoerative
I
wall
thickness
for
this
type
instal'ati0n
is
3".
1
that the products ofcombustion be prdpezy venied to theatmosphere and that all
the furnace near lengthwise
center
of
the
Do
not
install
the
combustion air supplied to burner be drawn from the outside atmosphere. (See
furance
with
the
vent
facing
toward
the
end
of
the coach,
'Installing Vent Assembly'.)
2. Choose a location for installation out of the way of wires, pipes, etc. which
IMPORTANT: If this furnace is to be connected to a common duct system also
might
interfere
with
the
installation,
Adhere
to ,he
clearances
from
,he
sewing a cooling unit, a manual or automatic damper is required to prevent any
cabinet
to combustible construction
as
listed
in Table
cold conditioned air from circulating back into the furnace. Cold air passing over
the furnace combustion chamber during
theoperationofthecooling result
NOTE: Side and top clearances may be
0"
for through the wall installations up to
in the formation of condensation inside the furnace combustion chamber
This
a
maximum wall
thickness
Of
3".
(See Figure
condensation may promote corrosion and premature failure of the combustion
chamber.
NOTE: These furnaces shall be installed so the electrical components are
protected from water.
These furnaces are design certified for
PropaneILP gas only. Do not attempt to
convert to natural gas.
Gas supply pressure for purposes of input adjustment.
Minimum
-
11" W.C.'
Maximum
-
13 W.C.'
(W.C.'
-
Water Column)
3.
When an appliance is installed directly on carpeting, tile or other combustible
material, other than wood flooring, the appliance shall be installed on a metal or
wood panel extending the full width and depth of the appliance. If preferred, the
carpeting, tile or combustible materials, other than wood may be cut away the full
length and depth of the appliance plus the appliance minimum clearances to
combustibles. (See Table 1
.)
4.
Cut an opening through the inner wall 12 7/16 x 13". This will allow the rear of
the furnace to be installed against the outer skin of the coach. (See Figure 1
.)
5.
Cut two 2 114" diameter holes through the outer skin of coach as shown in
Figure 1
In the U.S.A., the
installation
of the furnace must be in accordance wlth local
6. put furnace in place, making sure that rear of furnace cabinet IS as close to
codes and regulations. In the absence of local codes and regulations, refer to
the
outer skin of coach as possible and still assure proper vent tube overlap. (See
latest
ed~tion of:
Installing Vent Assembly).
1. Standard for
Recreat~onal Vehicles ANSl A-1 19.2lNFPA 501 C.
2. National Fuel Gas Code
ANSl 2223.1.
7. Fasten furnace to floor of coach using the two (2) holes provlded in the front
plenum area of furnace cabinet. (See Figure
1.)
8.
Install vent assembly. (See instructions for installing vent.)
Form No. 2469-C
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