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CGTH INSTALLATION, OPERATION AND SERVICE MANUAL
24
surface of the burner. Note this dimension here
________.
2. Using the tape measure, transfer this measure-
ment to the inside surface of the exterior wall that
the vent will penetrate; make a reference mark.
Check the location of the hole to ensure that there
are no internal wall structures (i.e. studs) to pre-
vent penetration. Also check that the outlet of the
vent does not compromise the general venting
requirements, See Section 5.1.
3. Using a tape measure, measure distances ‘A’, ‘B’,
‘C’ and ‘D’ as shown in Figure 18. Note these
dimensions here (A= ______, B= ______,
C=______, D=______) and add them together.
NOTE: If the total of dimensions above are greater
than 5' (1524 mm), a 5’ (1524 mm) balanced flue
vent extension kit (P/N 08039000) will be required.
FIGURE 18: Horizontal Installation Top View
4. From the reference mark made in step 2, measure
down vertically 1/4" (6 mm) per foot measured in
step 3. Cut 5” (125 mm) vent terminal clearance
hole at the lower reference.
5. Cut the 3” (80 mm) vent to length as follows:
Length A
3” diameter = A – 8”
Length B
3” diameter = B + C + D – 7 3/4”
Always cut a non-swaged end.
6. Wrap the 1" (2.5 cm) diameter spring around the
outside diameter of the 3" (80 mm) elbow as
shown in Figure 19.
FIGURE 19: Elbow Assembly End View
7. Interlock the loops at each end of the spring coils
together as shown in Figure 19. The loops will lock
together to produce a continuous coil spring
spacer around the outside diameter of the 3" (80
mm) elbow.
8. Fit the 5" (125 mm) elbow over the 3" (80 mm)
elbow (Figure 20).
FIGURE 20: Elbow Assembly Cross Section View
Optional Vent
Extension
Vent
Terminal
3" (80 mm)
pipe is slid
through end
of terminal
B
6" (152 mm)
Minimum
A
3" (80 mm)
5" (125 mm)
- Top View -
C
D
Heater
3" (80 mm)
Elbow
1" (25 mm)
Diameter Spring
Interlock Loops
as shown
5" (125 mm)
Diameter Elbow
3" (80 mm)
Diameter Elbow
1" (25 mm)
Diameter Spring
6" (152 mm)
2.75" (57 mm)