3
XIV. Startup Procedure & Adjustment ............................................................................................................................. 26
H
EAT
A
NTICIPATOR
S
ETTING
.............................................................................................................................. 26
D
RAIN
T
RAP
P
RIMING
....................................................................................................................................... 26
F
URNACE
OPERATION
........................................................................................................................................ 26
G
AS
S
UPPLY
P
RESSURE
M
EASUREMENT
............................................................................................................. 27
G
AS
M
ANIFOLD
P
RESSURE
M
EASUREMENT
AND
A
DJUSTMENT
................................................................................. 28
G
AS
I
NPUT
R
ATE
M
EASUREMENT
(N
ATURAL
G
AS
O
NLY
) ....................................................................................... 28
T
EMPERATURE
R
ISE
......................................................................................................................................... 29
C
IRCULATOR
B
LOWER
S
PEEDS
.......................................................................................................................... 29
XV. Normal Sequence of Operation ................................................................................................................................. 29
P
OWER
U
P
..................................................................................................................................................... 29
H
EATING
M
ODE
............................................................................................................................................... 29
C
OOLING
M
ODE
.............................................................................................................................................. 30
F
AN
O
NLY
M
ODE
............................................................................................................................................. 30
XVI. Operational Checks .................................................................................................................................................. 30
B
URNER
F
LAME
............................................................................................................................................... 30
P
RIMARY
L
IMIT
................................................................................................................................................ 30
XVII. Safety Circuit Description ....................................................................................................................................... 30
G
ENERAL
....................................................................................................................................................... 30
I
NTEGRATED
C
ONTROL
M
ODULE
......................................................................................................................... 30
P
RIMARY
L
IMIT
................................................................................................................................................ 30
A
UXILIARY
L
IMIT
.............................................................................................................................................. 31
R
OLLOUT
L
IMIT
............................................................................................................................................... 31
P
RESSURE
S
WITCHES
....................................................................................................................................... 31
F
LAME
S
ENSOR
............................................................................................................................................... 31
XVIII. Troubleshooting ...................................................................................................................................................... 31
E
LECTROSTATIC
D
ISCHARGE
(ESD) P
RECAUTIONS
............................................................................................... 31
D
IAGNOSTIC
C
HART
......................................................................................................................................... 31
R
ESETTING
F
ROM
L
OCKOUT
.............................................................................................................................. 31
XIX. Maintenance .............................................................................................................................................................. 31
A
NNUAL
INSPECTION
......................................................................................................................................... 31
F
ILTERS
.......................................................................................................................................................... 32
B
URNERS
....................................................................................................................................................... 32
I
NDUCED
D
RAFT
AND
C
IRCULATOR
B
LOWERS
....................................................................................................... 32
C
ONDENSATE
T
RAP
AND
D
RAIN
S
YSTEM
(Q
UALIFIED
S
ERVICER
O
NLY
) ..................................................................... 32
F
LAME
S
ENSOR
(Q
UALIFIED
S
ERVICER
O
NLY
) ...................................................................................................... 32
F
LUE
P
ASSAGES
(Q
UALIFIED
S
ERVICER
O
NLY
) ..................................................................................................... 32
XX. Internal Filter Removal .............................................................................................................................................. 32
XXI. Before Leaving an Installation ................................................................................................................................. 33
XXII. Repair & Replacement Parts ................................................................................................................................... 33
Table of Contents
APPENDIX
Troubleshooting Chart ..................................................................................................................................................... 34
GMS9/GCS9 Wiring Diagram ........................................................................................................................................... 36
