Empire Comfort Systems Mantis FF28BMN-1, Инструкция по установке и руководство пользователя, Страница: 25 / 56

25700-1-0809 Page 25
6’
5’
10’
10’
SINGLE FLUE ADAPTER
MODEL PVVK-SH
CO-LINEAR DIRECT VENT ADAPTER
MODEL PVCA
FIRST 90
DOES NOT GET COUNTED
WHEN WITHIN 6” (15.2cm)
OFF BACK OF HEATER
° ELBOW
90 ° ELBOW
3 FEET
90 ° ELBOW
3 FEET
CO-LINEAR TRANSITION
MODEL PVCT
OPTIONAL
VERTICAL TERMINATION CAP
MODEL PVVTC
PTRAP
H = 5’ + 6’ = 11’
V = 10’ + 10’ = 20’
(3) 90 ° = 9’
TOTAL = 40’
SIDE VIEW
3” MIN.
12” MIN.
FLAT ROOF
3” MIN.
12” MIN.
EXHAUST
AIR INTAKE
EXHAUST
AIR INTAKE
VERTICAL EXAMPLES FOR COLINEAR DIRECT VENT
Figure 32
Calculation example of vent run maximum 40’
Determining Minimum Vent Height Above the Roof
WARNING:
Major U.S. building codes specify minimum chimney and/or vent height above the rooftop. These minimum heights are
necessary in the interest of safety.
Special Note: The vent terminal (PTrap, Vent cap or two 90° elbows) and first 90° elbow off back of the heater, when within 6”
(15.2 cm) off back of the heater, do not contribute to the overall vent length measurement. For each 45° elbow installed in the
horizontal run, the length of the horizontal run MUST be reduced by 1.5 feet (45 cm). This does not apply if the 45° elbows are
installed on the vertical part of the vent system. Reduce the length of the horizontal run 3 feet (91.4 cm) for every 90° elbow.
Note: Exhaust must be a minimum of 3”
above air intake inlet.