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General Start-up and Adjustment
The following sections give instructions for the general
start-up and adjustment of the gas furnaces.
Preliminary Inspections
W W i i t t h h g g a a s s a a n n d d e e l l e e c c t t r r i i c c a a l l p p o o w w e e r r " " O O F F F F " " , , e e n n s s u u r r e e : :
1. Duct connections are properly sealed.
2. Filters are in place.
3. Venting is properly assembled.
4. Blower vestibule panel is in place and all screws in
place.
Turn knob on main gas valve within the unit to the
"O O F F F F " position. Turn the external gas valve to "ON".
Purge the air from the gas lines. After purging, check all
gas connections for leaks with a soapy solution.
— D D O O N N O O T T C C H H E E C C K K W W I I T T H H A A N N O O P P E E N N F F L L A A M M E E . . Allow 5
minutes for any gas that might have escaped to
dissipate. Turn the gas valve in the unit to the "ON"
position.
Propane Gas being heavier than air may require forced
ventilation. Turn the toggle switch on the Gas Valve in
the unit to the "ON" position.
Lighting Instructions
Lighting instructions appear on each unit. Each
installation must be checked out at the time of initial
start up to ensure proper operation of all components.
Check out should include putting the unit through one
complete cycle as outlined below.
Turn on the main electrical supply and set the comfort
control above the indicated temperature. The igniter
will automatically heat, then the gas valve is energized
to permit the flow of gas to the burners. After ignition
and flame is established, the flame control module
monitors the flame and supplies power to the gas valve
until the comfort control is satisfied.
W W A A R R N N I I N N G G
F F I I R R E E O O R R E E X X P P L L O O S S I I O O N N H H A A Z Z A A R R D D ! !
F F a a i i l l u u r r e e t t o o f f o o l l l l o o w w t t h h i i s s W W a a r r n n i i n n g g c c o o u u l l d d r r e e s s u u l l t t i i n n
p p r r o o p p e e r r t t y y d d a a m m a a g g e e , , s s e e v v e e r r e e p p e e r r s s o o n n a a l l i i n n j j u u r r y y , , o o r r
d d e e a a t t h h . .
D D o o N N O O T T a a t t t t e e m m p p t t t t o o m m a a n n u u a a l l l l y y l l i i g g h h t t t t h h e e f f u u r r n n a a c c e e . .
A952V-SVX001-1B-EN
T T o o s s h h u u t t o o f f f f
For complete shutdown: Turn the toggle or control
switch located on the main gas valve inside the unit to
the "OFF" position and the external main gas shutoff
valve to the "OFF" position. Disconnect the electrical
supply to the unit.
Whenever your house is to be vacant, arrange to have
someone inspect your house for proper temperature.
This is very important during freezing weather. If for
any reason your furnace should fail to operate damage
could result, such as frozen water pipes.
C C A A U U T T I I O O N N
F F R R E E E E Z Z E E C C A A U U T T I I O O N N ! !
F F a a i i l l u u r r e e t t o o f f o o l l l l o o w w t t h h i i s s C C a a u u t t i i o o n n c c o o u u l l d d r r e e s s u u l l t t i i n n
p p r r o o p p e e r r t t y y d d a a m m a a g g e e o o r r p p e e r r s s o o n n a a l l i i n n j j u u r r y y . .
I I f f c c o o m m p p l l e e t t e e f f u u r r n n a a c c e e s s h h u u t t d d o o w w n n i i s s d d o o n n e e d d u u r r i i n n g g t t h h e e
c c o o l l d d w w e e a a t t h h e e r r m m o o n n t t h h s s , , p p r r o o v v i i s s i i o o n n s s m m u u s s t t b b e e t t a a k k e e n n t t o o
p p r r e e v v e e n n t t f f r r e e e e z z e e - - u u p p o o f f a a l l l l w w a a t t e e r r p p i i p p e e s s a a n n d d w w a a t t e e r r
r r e e c c e e p p t t a a c c l l e e s s . .
Control and Safety Switch
Adjustment
L L i i m m i i t t S S w w i i t t c c h h C C h h e e c c k k O O u u t t
The limit switch is a safety device designed to close the
gas valve should the furnace become overheated.
Since proper operation of this switch is important to
the safety of the unit, it m m u u s s t t b b e e c c h h e e c c k k e e d d o o u u t t o o n n i i n n i i t t i i a a l l
s s t t a a r r t t u u p p b b y y t t h h e e i i n n s s t t a a l l l l e e r r .
To check for proper operation of the limit switches, set
the thermostat to a temperature higher than the
indicated temperature to bring on the gas valve.
Restrict the airflow by blocking the return air to the
blower. When the furnace reaches the maximum outlet
temperature as shown on the rating plate, the burners
must shut off. If they do not shut off after a reasonable
time and overheating is evident, a faulty limit switch is
probable and the limit switch must be replaced. After
checking the operation of the limit control, be sure to
remove the paper or cardboard from the return air
inlet, or reconnect the blower.
71
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