2
ELECTRICAL CONNECTIONS ................................. 21
W
IRING
H
ARNESS
........................................... 21
115 V
OLT
L
INE
C
ONNECTIONS
............................... 21
J
UNCTION
B
OX
R
ELOCATION
.................................. 22
24 V
OLT
T
HERMOSTAT
W
IRING
............................... 22
S
INGLE
-S
TAGE
H
EATING
T
HERMOSTAT
A
PPLICATION
.............. 23
24 V
OLT
D
EHUMIDISTAT
W
IRING
.............................. 23
F
OSSIL
F
UEL
A
PPLICATIONS
................................... 24
115 V
OLT
L
INE
C
ONNECTION
OF
A
CCESSORIES
(H
UMIDIFIER
AND
E
LECTRONIC
A
IR
C
LEANER
) ............. 24
A
UXILIARY
A
LARM
S
WITCH
: ................................... 25
GAS SUPPLY AND PIPING ...................................... 25
H
IGH
A
LTITUDE
D
ERATE
...................................... 25
P
ROPANE
G
AS
C
ONVERSION
................................... 25
G
AS
P
IPING
C
ONNECTIONS
.................................... 26
P
ROPANE
G
AS
T
ANKS
AND
P
IPING
............................. 28
CIRCULATING AIR & FILTERS ................................ 29
D
UCT
WORK
- A
IR
F
LOW
.................................... 29
C
HECKING
D
UCT
S
TATIC
...................................... 29
B
OTTOM
R
ETURN
A
IR
O
PENING
[U
PFLOW
M
ODELS
] ............ 30
F
ILTERS
- R
EAD
T
HIS
S
ECTION
B
EFORE
I
NSTALLING
T
HE
R
ETURN
A
IR
D
UCT
WORK
.......................... 30
U
PRIGHT
I
NSTALLATIONS
...................................... 30
H
ORIZONTAL
I
NSTALLATIONS
................................... 31
STARTUP PROCEDURE & ADJUSTMENT ..................... 31
D
RAIN
T
RAP
P
RIMING
........................................ 31
F
URNACE
O
PERATION
........................................ 31
G
AS
S
UPPLY
P
RESSURE
M
EASUREMENT
......................... 31
G
AS
M
ANIFOLD
P
RESSURE
M
EASUREMENT
AND
A
DJUSTMENT
...... 33
G
AS
I
NPUT
R
ATE
M
EASUREMENT
(N
ATURAL
G
AS
O
NLY
) ......... 33
T
EMPERATURE
R
ISE
.......................................... 34
C
IRCULATOR
B
LOWER
S
PEEDS
................................. 34
B
LOWER
H
EAT
O
FF
D
ELAY
T
IMINGS
........................... 36
C
OMFORT
N
ET
™ S
YSTEM
..................................... 37
O
VERVIEW
................................................. 37
A
IRFLOW
C
ONSIDERATIONS
.................................... 37
F
OSSIL
F
UEL
A
PPLICATIONS
................................... 37
CTK0* WIRING ................................................. 38
C
OMFORT
N
ET
S
YSTEM
A
DVANCED
F
EATURES
.................... 38
F
URNACE
A
DVANCED
F
EATURES
M
ENUS
........................ 39
T
HERMOSTAT
M
ENU
......................................... 41
D
IAGNOSTICS
................................................ 41
N
ETWORK
TROUBLESHOOTING
................................. 41
S
YSTEM
T
ROUBLESHOOTING
................................... 42
NORMAL SEQUENCE OF OPERATION ........................ 42
P
OWER
U
P
................................................. 42
H
EATING
M
ODE
............................................. 42
C
OOLING
M
ODE
............................................ 42
F
AN
O
NLY
M
ODE
........................................... 43
OPERATIONAL CHECKS ....................................... 43
SAFETY CIRCUIT DESCRIPTION .............................. 43
I
NTEGRATED
C
ONTROL
M
ODULE
.............................. 43
P
RIMARY
L
IMIT
.............................................. 43
A
UXILIARY
L
IMIT
............................................. 43
R
OLLOUT
L
IMIT
............................................. 43
P
RESSURE
S
WITCHES
......................................... 43
F
LAME
S
ENSOR
............................................. 43
T
ROUBLESHOOTING
.......................................... 43
E
LECTROSTATIC
D
ISCHARGE
(ESD) P
RECAUTIONS
................ 43
D
IAGNOSTIC
C
HART
.......................................... 44
R
ESETTING
F
ROM
L
OCKOUT
.................................. 44
MAINTENANCE ................................................. 44
A
NNUAL
I
NSPECTION
......................................... 44
F
ILTERS
.................................................... 44
B
URNERS
................................................... 45
I
NDUCED
D
RAFT
AND
C
IRCULATOR
B
LOWERS
.................... 45
C
ONDENSATE
T
RAP
AND
D
RAIN
S
YSTEM
(Q
UALIFIED
S
ERVICER
O
NLY
) ........................... 45
F
LAME
S
ENSOR
(Q
UALIFIED
S
ERVICER
O
NLY
) .................. 45
F
LUE
P
ASSAGES
(Q
UALIFIED
S
ERVICER
O
NLY
) .................. 45
BEFORE LEAVING AN INSTALLATION ........................ 45
REPAIR AND REPLACEMENT PARTS .......................... 45
DIP SWITCHES ................................................. 46
STATUS CODES ................................................ 47
TROUBLESHOOTING CHART ................................. 48
WIRING DIAGRAM ............................................. 54
SPECIAL INSTRUCTIONS FOR PRODUCTS INSTALLED .... 55
IN THE STATE OF MASSACHUSETTS ........................ 55
