Installation Preparation - Model Gds60; Orifice Replacement - Napoleon GDS60N Installation And Operating Instructions Manual

Example:
V = 1.5 FT
1
V = 5 FT
2
V = V + V = 1.5 + 1 + 5 = 6.5 FT
T 1 2
H = 1 FT
1
H = 1 FT
2
H = 10.75 FT
3
H = H + H + H
R 1 2 3
H = .03 (four 90° elbows + one 45° elbow - 90°)
O
= .03 (360° + 45° - 90°) = 6.75 FT
H = H + H = 12.75 + 6.75 = 19.5 FT
T R O
H + V = 19.5 + 6.5 = 26 FT
T T
Formula 1:
H < 3 V
T T
3 V = 3 x 6.5 = 19.5 FT
T
19.5 = 19.5
Formula 2:
H + V < 40 FT
T T
26 < 40
Since both formulas are met, this vent configuration is acceptable.

4.0 INSTALLATION PREPARATION - MODEL GDS60

4.1

ORIFICE REPLACEMENT

REAR VENT TERMINATION:
In rear exit installations with no vertical vent run, the BTU input must
be reduced to 21,000 BTU by changing the orifi ce.
In order to access the orifi ce, the log support secured by two screws,
must be removed.
Care should be taken not to damage the gas pipe. When removing
the orifi ce, using a socket wrench, a back-up wrench must be used
on the manifold, located below the housing, to ensure that the alumi-
num tubing does not twist or kink.
= 1 + 1 + 10.75 = 12.75 FT
90°
H
2
45°
V
1
H
1
90°
23
V
2
90°
H
3
18.2_3
W415-0788 / B / 11.03.10