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Property Damage - Atwood HYDRO FLAME 8935 Technical Installation Manual

8900-iii-ld series
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4. Insert furnace from backside of wall. Line up hole in wall and furnace.
5. Apply sealant to back of vent ring and vent cap base.
6. Install vent assembly with HOT at top for horizontal and on right
side for vertical installation (
intake tube. Secure to wall with four (4) screws.
7. Vent must have a minimum 1-1/4" over lap on exhaust tube and a
minimum 1/2˝ overlap on combustion airtube.
8. Horizontal units - secure to floor with two (2) screws through legs
on back of casing. Vertical units use vertical mounting brackets and
self-tapping screws to hold furnace to floor (tabs on control box can
be used also to secure furnace).
DUCTING
-
HORIZONTAL & VERTICAL
HORIZONTAL
PROPER DUCT INSTALLATION IS CRITICAL TO THE OPERATION OF THIS FURNACE
DUCTS
IN LENGTH OR MORE
˝
DUCTS LESS THAN 9
IN LENGTH
METAL BOOTS LESS THAN
IN LENGTH
Ducting systems can include any combination of discharge openings, as
long as static pressure and minimum discharge area requirements are met.
ALL MODELS - (also see
STATIC PRESSURE TEST
REQUIRED MINIMUM DISCHARGE
REQUIRED MINIMUM RETURN AIR
• See
MINIMUM CLEARANCE TO FLOORBOARDS
.
BUILDING MATERIALS
• Each 4-inch duct opening provides 12 in
an extra 12 in
2
of non closeable duct discharge area for each
closeable register used.
• Use of 2˝ ducts does not count toward achieving min. discharge req.
Ducting in dead air space with no return air, such as holding tank
areas, does not count toward achieving min. discharge requirements.
• Adjust ducting installation to obtain air rise of 100˚F - 130˚F.
Flexible Ducting System
When designing Flexible Duct Systems:
• avoid sharp bends or crushed ducts
• stretch all ducts and run them directly to outlets, keeping quanti-
ty and angles of bends to a minimum
1. Remove knockout plates from desired outlets.
2. Attach duct adapter to each opening, by inserting flange over casing,
locking tab into casing slot and turning adapter 90˚.
3. Attach and secure
-
FOUR
INCH
4. Run ducts to desired location within RV, secure to registers.
5. Additional ducting may be needed to maintain static pressure.
Hard Ducting Floor System
When designing Hard Duct Systems:
• undersize ducting will cause high temperature limiting
• oversize ducting will cause inadequate air flow from registers
• when hard ducting is 1-1/2˝ in depth, an additional flex duct may
be needed to maintain installation static requirements
install floor registers within 2 feet of return air openings.
DO NOT
-
OPTIONAL INSTALLATION
BOTTOM DISCHARGE
1. Remove bottom discharge cover plate. This ducting option must
be connected to a ducting system.
GASKET AND PLENUM PLATE KIT
2. If cutout is required:
BOTTOM DISCHARGE
-
HORIZONTAL
WITHOUT DOOR (
4)
FIG
3. Fasten plenum plate (4-E) over floor cutout. If a gasket and
plenum plate are not used, seal furnace to hard duct system mak-
ing sure seal is air-tight, continue with
4. Position gasket (4-F) on plenum plate.
5. Set furnace on gasket, gasket must remains in position.
Use additional ducting to maintain correct static pressure.
1-1A). Slip vent into combustion air
FIG
(
)
FIG 3-4A
CONTINUOUS USE MATERIALS RATING
200˚F.
250˚F.
250˚F.
)
48
2
IN
80
2
IN
,
WALLS & SIMILAR COMBUSTIBLE
2
of discharge area. Provide
flexible ducts to adapters.
(
4-4)
FIG
3 (parts breakdown) #40 -
FIG
is available when attaching furnace.
FLOOR CUTOUT
A
B
C
18-20 1/2˝
5-1/2˝
10-1/2˝
5.
STEP
VERTICAL
The only ducting option, when using vertical installation, are the top
two ducts and tw ducts off the back of the casing. This is the only
configuration allowed with vertical installation (
GAS CONNECTION
1. Connect gas line to fitting on top rear of furnace. Be sure all male
pipe threads, other than flare fittings, are treated with a sealing com-
pound resistant to the action of propane (LP) gas.
compound on flare fittings.
2. A 3/8˝ flared fitting connection is provided for supply connection to
furnace. The gas supply line of the furnace must be of adequate size
to provide 11˝ W.C. gas pressure. This pressure must be maintained
under maximum flow conditions with all gas appliances in operation.
3. Use two wrenches to hold fitting and flare nut when tightening gas
line to fitting. (
FIG
ELECTRICAL CONNECTION
INJURY OR PROPERTY DAMAGE
• Label all wires before disconnecting for service. Wiring errors can
cause improper and dangerous operation.
Verify proper operation after servicing.
• Disconnect electrical power before servicing.
Conductor Sizing Table -
(
)
CURRENT DRAW
AMPS
8
.
GAGE
MAX
LENGTH OF SAE CONDUCTOR
18
21
16
33
14
52
This connection is for low-voltage battery or direct current only. Do
not connect to 120- or 240- volts AC.
This unit is designed for negative ground 12 volt DC ONLY. Polarity
must be observed so furnace motor will run in proper rotation.
attempt to alter to a positive ground system.
12
VOLT DC MODELS
Route 12 volt DC and thermostat leads to left side of control box. Use
a minimum of 18 GA wire to minimize voltage drop. The furnace must
be installed so electrical components are protected from water. To
make electrical connections: see
1. Route wiring to left side of furnace.
2. Connect red wire to positive side of power supply.
3. Connect yellow wire to grounded side of power supply.
4. Connect blue wire marked positive thermostat to + side wire of
thermostat using 22-18 GA stranded wire.
5. Connect the other blue wire to the other thermostat lead using
minimum 22-18 GA stranded wire.
See instruction with thermostat for complete wiring directions.
For best furnace performance when power supply is from a converter
D
equipped with a charging port, wire the converter to furnace parallel
3/4˝
with battery. This provides consistent voltage to furnace, increasing
component life, filtering power surges and AC spikes
120
VOLT AC MODELS
Route 120 volt AC and thermostat leads to wires located on the left
side of control box using a minimum of 18 GA wire. The furnace must
be installed so electrical components are protected from water. To
make electrical connections see
3
.
)
2
(FIG 5)
WARNING
.
10%
MAX
VOLTAGE DROP
9
10
15
(
)
IN FEET
FROM SOURCE TO DEVICE
19
17
11
29
26
17
46
41
28
CAUTION

PROPERTY DAMAGE

WIRING DIAGRAM FIG 5
WIRING DIAGRAM FIG 5.
3A).
FIG
put sealing
DO NOT
-
(12
)
VDC
20
9
13
21
DO NOT

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