Dunkirk DKVLT-050 Installation, Operation & Maintenance Manual page 25

FIGURE 6-4 Side Wall Concentric Terminal
Combustion
Air
FIGURE 6-6 Concentric Terminal Connection
*2 or 3" (51 or 77 mm) Diameter
PVC intake/combustion air
Combustion Air
OD 3½" - *2"
(89mm)
OD 4½" - 3"
(114mm)
6 - COMBUSTION AIR AND VENT PIPING
1"(2.54cm)
Maximum
1" (25.4mm)
Maximum
Vent
kit
(51mm)
kit
(77mm)
** Note Overall length may be modified by cutting or extending
both combustion air and vent pipes. 12" (305mm) is minimum
allowable length and 60" (1.2m) is maximum allowable length for
this dimension.
SDR-26 PVC (D2241) only may be used for extending pipes.
Do not use Schedule 40 PVC or use couplings to extend pipes.
Dimension will change if intake/vent pipes are lengthened or
shortened.
* Note: 2" (51mm) For use with models 050/075/100.
3" (77mm) For use with models 075/100/150/200/299
4" (101mm) For use with model 299
FIGURE 6-5 Side Wall Concentric Terminal Multiple
Appliances
1" (25mm)
Maximum
* See Note
Below
Combustion
Air
*Must be less than 4" (102mm) or greater than 24"
(610mm) Horizontal distance between end bells of each air
intake to prevent flue gas recirculation.
Note: Securing strap must
be field installed to prevent
movement of termination
kit in side wall
*2" (51mm) Diameter = 41" Length (1.1m)
3" (77mm) Diameter = 47" Length (1.2m)
25
Roof
Overhang
12" (305mm) Minimum
36"(0.9m
Maintain 12"
clearance above
Maintain 12"(30cm) US
Vent
highest anticipated
(18"(46cm) Canada)
Clearance Above
snow level or grade
Highest Anticipated
Snow Level Or Grade
**See
1"(25.4mm)
Note
Maximum
Combustion Air
) Minimum
Vent