General Start-Up And Adjustment; Preliminary Inspections; Lighting Instructions; Control And Safety Switch - American Standard S9X1 Installer's Manual

General Start-up and Adjustment

The following sections give instructions for the general
start-up and adjustment of the gas furnaces.
With gas and electrical power "OFF", ensure:
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.

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.
To shut off
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.

Control and Safety Switch

Adjustment

LIMIT SWITCH CHECK OUT
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 must be checked out
on initial start up by the installer.
18-CE12D1-1D-EN

Preliminary Inspections

Turn knob on main gas valve within the unit to the "OFF" 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.
— DO NOT CHECK WITH AN OPEN FLAME. 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.
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 . .
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 . .
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