7
®
SS
SS
POWER
CALL FOR
HEAT
STAGE 1
STAGE 2
STAGE 3
SAFETY
IGNITION
FLOW
BLOWER 1
BLOWER 2
ON
STANDBY
PROUDLY MADE IN AMERICA
PROUDLY MADE IN AMERICA
POWER
CALL FOR
HEAT
STAGE 1
STAGE 2
SAFETY
IGNITION
FLOW
BLOWER 1
ON
STANDBY
P/N 901891
POWER
ON
CALL FOR
HEAT
BURNER
FIRING
SERVICE
REQUIRED
OFF
P/N 901927 REV 1
G
GAS CONNECTION
H
WATER IN
H
WATER OUT
T
COMBUSTION AIR
INLET DIA.
K
OPTIONAL
REAR FLUE
CONNECTION DIA.
T & P GAUGE
VIEW PORT
18-5/8
12-1/8
7-1/2
7-1/8
11-5/8
25
31-1/4
34-1/8
7
6
6-1/2
PRV
1° SLOPE ON JACKET TOP
25-1/2
G
OPTIONAL GAS CONNECTION
INLET DIA.
K
FLUE
CONNECTION DIA.
T
OPTIONAL COMBUSTION AIR
INLET DIA.
OPTIONAL
PUMP COVER
G
OPTIONAL GAS CONNECTION
INLET DIA.
T
OPTIONAL COMBUSTION AIR
INLET DIA.
OPTIONAL
PUMP COVER
MANUAL SHUT-OFF
& DIAGNOSTIC LIGHTS
MANUAL SHUT-OFF
& DIAGNOSTIC LIGHTS
OPTIONAL PUMP
OPTIONAL PUMP
28-1/2
28-1/2
3-1/4
2-1/2
2-1/2
2-1/2
1-3/4
17-3/4
17-3/4
A
B
K
FLUE
CONNECTION DIA.
A
B
W
3-1/4
32-7/8
32-7/8
W
G
GAS CONNECTION
H
WATER IN
H
WATER OUT
T
COMBUSTION AIR
INLET DIA.
K
OPTIONAL
REAR FLUE
CONNECTION DIA.
T & P GAUGE
VIEW PORT
PRV
1° SLOPE ON JACKET TOP
12-7/8
20-3/8
30-3/8
6-3/4
8-1/4
8-5/8
9-1/2
41-1/4
35-3/4
32-5/8
10-7/8
13-1/4
DRAWING 1 - MODELS HD101-HD401
DRAWING 2 - MODELS 302B-902B
DRAWING 3 - MODELS 992B-2342B
OUTDOOR
VENT TERMINAL
OUTDOOR
VENT TERMINAL
MANUAL SHUT-OFF
& DIAGNOSTIC LIGHTS
ON-BOARD
DIAGNOSTIC
CENTER
ON-BOARD
DIAGNOSTIC
CENTER
H
WATER IN
G
GAS CONNECTION
LOW VOLTAGE CONNECTIONS
H
WATER OUT
8-7/8
OPTIONAL PUMP
A
B
K
FLUE CONNECTION DIA.
T
COMBUSTION AIR DIA.
LINE VOLTAGE CONNECTIONS
26-3/8
19-7/16
16-9/16
1-1/4
5-1/16
18-1/4
8-1/2
19-3/8
22-1/8
23-1/2
26
4-9/16
SEE
PUMP
CHART
1° SLOPE ON JACKET TOP
4-15/16
13-1/2
