De-Rating For Altitude Installation - Riello Condexa PRO NA 75P Installation, Operation And Service Manual

Multiple air and vent vertical terminations; X ≥ 12" (305 mm);
Y≥ 12" (305 mm)
Vent
Air intake
Multiple air and vent vertical termination; X≥ 12" (305 mm);
Y≥ 12" (305 mm)
Vent
Air intake
Multiple air and vent vertical termination; X ≥ 12" (305 mm);
Y≥ 12" (305 mm)
Air intake
Vent
Air intake Vent
Y
Air intake Vent
Y
Vent Air intake
Y
Multiple air and vent vertical termination ; X≥ 12" (305 mm);
Y≤ 25" (635 mm); Z = 12" (305 mm) to 16" (406 mm)
Vent terminals
Air intake

2.13.7 De-rating for altitude installation

When the appliance is installed at an altitude higher than 2000 ft,
refer to the regulations and authorities having jurisdiction.
% range of the length of the vent and
Condexa PRO NA
combustion air pipe installed referred to
75 P
From
Altitude 0% to
25%
255900
0-2000 ft (0-610m) btuh (75
kw)
% range of the length of the vent and
Condexa PRO NA
combustion air pipe installed referred to
117 P
From
Altitude 0% to
25%
399000
0-2000 ft (0-610m) btuh (117
kw)
35
INSTALLATION
Vent terminals
Y
the maximum equivalent length
From From
25% to 50% to
50% 75%
255900 255900
btuh (75 btuh (75
kw) kw)
the maximum equivalent length
From From
25% to 50% to
50% 75%
399000 399000
btuh (117 btuh (117
kw) kw)
Z
From
75% to
100%
255900
btuh (75
kw)
From
75% to
100%
399000
btuh (117
kw)