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156156
EXTRA OPENING
FOR THERMOMETER
AND PRESSURE
RELIEF VALVE
HW-520 AND
HW-670
LOCATION OF MANUAL
MAIN SHUTOFF VALVE
OUTSIDE JACKET WHEN
CODE REQUIRE
(NOT SUPPLIED)
H
S
T
P
K
C
E
J
D
N
GAS INLET
(MALE) NPT
M
OUTLET
NPT
HW-300
L INLET
NPT
G
B
A
F
F
EXTRA OPENIN
G
FOR THERMOMETER
A
ND PRESSURE
RELIEF VALVE
HW-520 AN
D
HW-670
LOCATION OF MANUAL
MAIN SHUTOFF VALVE
OUTSIDE JACKET WHEN
CODE REQUIRE
(NOT SUPPLIED)
H
S
T
P
K
C
E
J
D
N
GAS INLET
(MALE) NPT
M
OUTLET
NPT
HW-300
L INLET
NPT
G
B
A
F
F
Dimensions in Inches
Models
HW-300 HW-399 HW-420 HW-520 HW-670
A Overall height
65 57-1/8 57-1/8 68-5/16 68-5/16
B
Height to Top of
Jacket
43-1/4 45-1/8 45-1/8 56-1/4 56-1/4
C
Floor to Center
Line Water Outlet
36 38-3/4 38-3/4 46 46
D Diameter of Jacket
25-1/4 27 27 27 27
E
Floor to Center
Line Water Inlet
12 12 12 12 12
F
Draft Diverter
Outlet Diameter
8 10 10 10 12
G
Floor to Center
Line Gas Inlet
16-1/2 16-3/4 16-3/4 8 8
H Overall Depth
29-5/8 31-1/2 31-1/2 36-1/2 36-1/2
J Support Height
9 9 9 9 9
K
Width of Control
String (approx.)
14 14 14 11 11
L
Pipe Size of Water
Inlet (NPT)
1-1/4 1-1/2 1-1/2 2 2
M
Pipe Size of Water
Outlet (NPT)
1-1/4 1-1/2 1-1/2 2 2
N
Pipe Size of Gas
Inlet (NPT)
3/4 3/4 1 1 1
P
Control String Plus
1/2 Jacket Diame-
ter (approx.)
26-5/8 27-1/2 27-1/2 24-1/2 24-1/2
S
Horizontal Length
between Water
Inlet & Outlet
5-3/8 5-1/2 5-1/2 5-3/4 5-3/4
T
Control String from
Jacket
5 5 5 7 7