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System Checks; Fire Or Explosion - Atwood 8516 Technical Installation Manual

8500-iv series
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4. Secure furnace to coach floor with four screws.
AVOID DAMAGE TO ANY WORKING COMPONENTS
SEAL AGAINST GASKET ON SCREEN
CUTOUT
1-1/2˝ - 2-1/2˝
RECOMMENDED WALL THICKNESS
-
DO NOT OVERSIZE HOLE
OVERSIZING CAN RESULT IN WATER LEAKAGE
EXTERIOR WALL CUTOUT
(
)
RECESS FURNACE
FIG 13
5. Place recess cover over top of furnace with all edges of door outside
of control box. Hold firmly into place while using holes in door to
locate mounting tabs and clips. Use #8 or #10 sheet metal screws to
fasten door in place.
Follow
STANDARD FURNACE INSTALLATION
stat and draft cap assembly.

SYSTEM CHECKS

FIRE OR EXPLOSION

Never check for leaks with an open flame.
PROPANE GAS PRESSURE TEST
The furnace and any individual shut-off valve must be disconnected
from gas supply piping system during any pressure testing of system
at test pressures of more than 1/2 PSI.
Before furnace is connected piping systems must be tested to be leak
free. The test must maintain air pressure of at least 6˝ of mercury or 3
PSI for at least 10 minutes.
The entire piping system must be maintained within a range of 10-14˝
W.C. when all appliances are in operation. Test gas connections for
leakage with a leak test solution.
14
GROUND
ELECTRODE
YELLOW
VALVE
SAIL
SWITCH
YELLOW
RED
WHITE
RED
YELLOW
IMPORTANT: If any original wire has to be replaced, it must be replaced with type 105° C or its equivalent.
Terminal Block on 85 Models only.
LOCATE SCREWS TO
,
WHILE MAINTAINING PRESSURE
.
A
B
4-3/4˝
instructions for ducting, thermo-
WARNING
BLACK
RED
RED
ON/OFF
SWITCH
YELLOW
YELLOW
BLUE
BLUE
BLW PWR
IGNITION
BLUE
CONTROL
LIMIT
SWITCH
WHITE
HIGH TENSION
STATIC PRESSURE TEST
Please refer to Engineering Addendum when installing the furnace. This
will provide you with allowable maximum case static pressures with
each possible variation of duct configurations. The addendum is avail-
able from your Atwood Field Service Representative or by calling
Atwood Service Toll Free.
Reducing the number of duct turns and stretching the ducts will
increase airflow and reduce static pressure. Adding ducts or increasing
the discharge (hard duct) system will also reduce static pressure.
You must follow the manufacturer's recommendations and specifica-
tions for optimum performance and proper operation.
FAULT
Internal Circuit Board Failure
Limit switch/Airflow problems
Flame Sense Fault
Ignition Lockout Fault
INSIDE
FURNACE
MOTOR
CIRCUIT
12V DC
BREAKER
SUPPLY
ON
OFF
RED
+ 12V DC
1
1
NEG
4
4
+THERMO
BLUE
2
2
THERMO
5
5
3
3
6
6
THERMOSTAT
CUSTOMER SUPPLIED WIRING
5
(
.
1)
FIG
DIAGNOSTIC CHART
LED INDICATION
Steady on, no flashing
1 flash with 3-second pause
2 flashes with 3-second pause
3 flashes with 3-second pause
Note: On/OFF Switch may be separate
or combined with Circuit Breaker.

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