Page 2
O23V Unit Dimensions − Inches (mm)
SUPPLY
AIR
OPENING
FLUE
CONNECTION
(On Heat
Exchanger)
22
(559)
14
(356)
2 (51)
1-1/2
(38)
23-1/2
(597)
54
(1372)
1-1/2 (38)
3/4 (19)
22
(559)
1-1/4 (32)
TOP FLUE OUTLET
SIDE FLUE OUTLET
CENTERING HOLE
(Field Fabricate Either Side)
ELECTRICAL INLET
(Right Side Only)
OIL PIPING INLET
(Left Side Only)
OPT. OUTDOOR
COMBUSTION AIR INLET
CENTERING HOLE
(Field Fabricate Right Side only)
RETURN AIR OPENING
(Either Side)
3/4 (19)
A
B
C
D
AIR FLOW
TOP VIEW
RETURN AIR SIDE VIEW
E
RETURN AIR FRONT VIEW
Figure 1
O23V Unit Dimensions − Inches (mm)
O23V Model
A
B
C
D
E
−Q2/3−70/90
& −
Q3/4−105/120
19−1/2
(495)
30−5/8
(778)
18
(457)
19−5/8
(498)
16
(406)
−Q5−140/154
22−1/2
(572)
33−1/8
(841)
21
(533)
22−1/8
(562)
18
(457)
WARNING
Improper installation, adjustment, alteration, ser-
vice or maintenance can cause personal injury, loss
of life, or damage to property.
Installation and service must be performed by a li-
censed professional installer, or equivalent, or ser-
vice agency.
CAUTION
Never burn garbage or paper in the heating system.
Never leave papers near or around the unit.
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