Lighting; Gas Input Adjustment - Trane GXAA Installation, Operation And Maintenance Manual

O O p p e e r r a a t t i i o o n n
tighten set screw and replace belt(s). Adjust belt tension to give 1⁄2 inch to 3⁄4 inch belt play when
depressed.
B B l l o o w w e e r r M M o o t t o o r r F F a a i i l l u u r r e e ! !
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 i i n n s s t t r r u u c c t t i i o o n n s s b b e e l l o o w w 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 i i m m p p r r o o p p e e r r u u n n i i t t o o p p e e r r a a t t i i o o n n a a n n d d m m o o t t o o r r
f f a a i i l l u u r r e e . .
B B l l o o w w e e r r m m o o t t o o r r f f u u l l l l l l o o a a d d a a m m p p s s s s h h o o u u l l d d n n e e v v e e r r b b e e e e x x c c e e e e d d e e d d . . R R e e f f e e r r t t o o m m o o t t o o r r d d a a t t a a p p l l a a t t e e f f o o r r
m m a a x x i i m m u u m m f f u u l l l l l l o o a a d d a a m m p p s s . .
After changing blower RPM, confirm blower motor full load amps have not been exceeded. See
motor data plate for maximum full load amps.

Lighting

N N o o t t e e : : Refer to Separated Combustion Indoor Duct Furnace Manual for all heating functions -
Purge the gas line to the unit of air before attempting to light the pilot. Check for gas leaks.
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 s s a a f f e e l l e e a a k k t t e e s s t t p p r r o o c c e e d d u u r r e e s s b b e e l l o o w w 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 d d e e a a t t h h o o r r s s e e r r i i o o u u s s i i n n j j u u r r y y o o r r
e e q q u u i i p p m m e e n n t t o o r r p p r r o o p p e e r r t t y y - - o o n n l l y y - - d d a a m m a a g g e e . .
N N e e v v e e r r u u s s e e a a n n o o p p e e n n f f l l a a m m e e t t o o d d e e t t e e c c t t g g a a s s l l e e a a k k s s . . U U s s e e a a l l e e a a k k t t e e s s t t s s o o l l u u t t i i o o n n f f o o r r l l e e a a k k t t e e s s t t i i n n g g . .
This unit is equipped with an intermittent ignition system. A lighting instruction is attached to the
unit. To set the intermittent ignition system into operation proceed as follows:
1. Turn on the gas valve(s) main manual valve.
2. Turn on electrical power. The unit is now under thermostat control.
3. Set thermostat to highest level. This will initiate the sequence of operation detailed in the Gas
4. Set thermostat to lowest level. This will interrupt power to the ignition control and shut off
5. Set the thermostat to the desired setting.
For complete unit shutdown, proceed as follows:
1. Turn off the gas valve(s) main manual valve.
2. Set thermostat to lowest setting.
3. Shut off all electric power.

Gas Input Adjustment

When shipped from the factory, all units are equipped for the average heat content of the gas
which is stamped on the unit rating plate.
H H e e a a t t E E x x c c h h a a n n g g e e r r D D a a m m a a g g e e ! !
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 i i n n s s t t r r u u c c t t i i o o n n s s b b e e l l o o w w 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 h h e e a a t t e e x x c c h h a a n n g g e e r r d d a a m m a a g g e e . .
H H e e a a t t c c o o n n t t e e n n t t o o f f g g a a s s v v a a r r i i e e s s b b y y l l o o c c a a l l i i t t y y ; ; c c h h e e c c k k t t h h e e g g a a s s i i n n p p u u t t a a f f t t e e r r i i n n s s t t a a l l l l a a t t i i o o n n o o f f t t h h e e u u n n i i t t t t o o
e e n n s s u u r r e e p p r r o o p p e e r r i i n n p p u u t t . . N N e e v v e e r r e e x x c c e e e e d d t t h h e e i i n n p p u u t t o o n n t t h h e e r r a a t t i i n n g g p p l l a a t t e e . .
For an accurate input rate measurement the following meter method should be used to
determine unit input rate. If the meter method is not possible, a manifold pressure check should
be made.
M M e e t t e e r r M M e e t t h h o o d d o o f f C C h h e e c c k k i i n n g g I I n n p p u u t t R R a a t t e e
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general comments are as follows.
Control System section. Check main burners for operation.
gas. Confirm pilot and main burners have been extinguished.
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