John Wood Direct Vent - Manuel (Page 24)

24 www. johnwoodwaterheaters .com
ABOVE
ANTICIPATED
SNOW LEVEL
OR 305mm
(12”) ABOVE
GRADE
A
B
Low Vent installation
7
6
8
1
C
5 1
9
Figure 27
DIM. 4038 5040 5047
A 2.03m (80”) MAX.
B 228mm (9”) MIN.
C
(RECOMMENDED)
1.62m (63.63”) 1.85m (73.00”) 1.88m (74.00”)
C
(MINIMUM)
1.54 (60.75) 1.75 (69.50) 1.79 (70.50)
D 362mm (14.25”) MIN.
NOTE: Dimension “C” is the height above to fl oor to the center of the
termination hole through the exterior wall.
D
4
Minimum Vent installation
C
ABOVE
ANTICIPATED
SNOW LEVEL
OR 305mm
(12”) ABOVE
GRADE
3
228mm
(9”)
Figure 28
305mm
(12”) MIN.
BELOW
SOFFIT
1.83m
(72”)
MAX.
6
2
High Vent installation
5 1
1
432mm
(17”)
MIN.
Figure 29
NOTES: (applies to Figure 27 thru Figure 29)
1. In any installation the total of dimension “A” plus
dimension “B” must not exceed 2.26m (89”).
2. This heater can be installed with 0mm (0”) clearance
to a wall.
3. Minimum vent pipe clearance to combustibles is 25mm
(1”) (see Figure 20).
4. Minimum distance from center of heater to wall is
362mm (14.25”).
5. Dimension “A” includes wall thickness.
6. Hole diameter in wall is 178mm (7”).
7. Venting must slope up away from the heater a
minimum of 6.4mm per 305mm (0.25” per foot) of
length to prevent condensation from collecting
and to provide suffi cient draft.
8. Distance above horizontal at full extension is 50mm
(2”).
9. Use support stays to hold the venting to avoid sags
or valleys.