Thevent must be installed to prevent flue gas leakage.
Care must be taken during assembly to ensure that all
joints are sealed properly and are airtight. The vent
must be installed to prevent the potential accumulation
of condensate in the vent pipes. It is required that:
1. The vent must be installed with a condensate
drain located in proximity to the heater as directed
by the vent manufacturer.
2. The vent must be installed with a slight upward
slope of not less than 1/4 inch per foot of horizon-
tal run to the vent terminal.
3. The vent must be insulated through the length of
the horizontal run.
Termination
The flue direct vent cap MUST be mounted on the ex-
terior of the building. The direct vent cap cannot be
installed in a well or below grade. The direct vent cap
must be installed at least 1 ft above ground level and
above normal snow levels. The Raypak-approved
stainless steel flue direct vent cap must be used (sales
order option D-15). The vent terminal must be located
NO CLOSER than 12” off the wall.
Direct Vent—Vertical
Installation
These installations utilize the heater-mounted blower
to draw combustion air from outdoors and vent com-
bustion products to the outdoors.
The total length of air supply pipe cannot exceed the
distances listed in TableM. Each elbow used is equal
to 10 ft of straight pipe. This will allow installation in
any arrangement that does not exceed the lengths
shown in Table M.The vent cap is not considered in
the overall length of the venting system.
Care must be taken during assembly that all joints are
sealed properly and are airtight.
The vent must be installed to prevent the potential ac-
cumulation of condensate in the vent pipes. It is
required that:
1. The vent must be installed with a condensate
drain located in proximity to the heater as directed
by the vent manufacturer.
2. The vent must be installed with a slight upward
slope of not more than 1/4 inch per foot of hori-
zontal run to the vent terminal.
3. The vent must be insulated through the length of
the horizontal run.
Termination
The vent cap MUST be mounted on the exterior of the
building. The vent cap cannot be installed in a well or
below grade. The vent cap must be installed at least 1
ft above ground level and above normal snow levels.
The vent cap MUST NOT be installed with any com-
bustion air inlet directly above a vent cap. This vertical
spacing would allow the flue products from the vent
capto bepulled intothe combustionair intakeinstalled
above.
This type of installation can cause non-warrantable
problems with components and poor operation of the
heater due to the recirculation of flue products. Multi-
ple vent caps installed in the same horizontal plane
must have a 4 ft clearance from the side of one vent
cap to the side of the adjacent vent cap(s).
WARNING: No substitutions of flue pipe or vent
cap material are allowed. Such substitutions would
jeopardize the safety and health of inhabitants.
CAUTION: This ve nting system req uires the
installation of a condensate drain in the vent piping
per the vent manufacturer’s instructions. Failure to
install a condensate drain in the venting system will
void all warranties on this heater.
Fig. 28: Direct Vent- Vertical
28