33
Installation
These installations utilize the heater-mounted blower
to draw combustion air and to vent the combustion
products to the outdoors. The combustion air intake
and the vent are installed horizontally through the wall
to the outdoors. Adequate ventilation air must be sup-
plied to the equipment room in accordance with the
NFGC (U.S.) or B149 (Canada).
The total length of the horizontal through-the-wall
direct vent system should not exceed 200 equivalent ft
in length. If combined vent/intake run exceeds 200
equivalent ft, an appropriately sized variable-speed
extractor must be used. Each elbow used is equal to
10 ft of straight pipe with a maximum of 4 elbows each
on the air intake and vent.
The vent cap is not considered in the overall length of
the venting system.
The vent 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 condensate drains
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.
WARNING:
No substitutions of flue pipe or vent
cap material are allowed. Such substitutions would
jeopardize the safety and health of inhabitants.
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.
Only Raypak-approved vent caps may be used. The
vent terminal must be located NO CLOSER than 12”
off the wall.
CAUTION:
This venting system requires 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 boiler. The drain line must
not be allowed to freeze. Take appropriate
measures.
Summary of Contents for 88AR-398A
Page 18: ...18 Fig 13 MODE 1 Single Boiler Primary Secondary Piping...
Page 19: ...19 Fig 14 MODE 2 Single Boiler Primary Secondary Piping with Indirect DHW on System Loop...
Page 20: ...20 Fig 15 MODE 3 Single Boiler Primary Secondary Piping with Indirect DHW on Boiler Loop...
Page 47: ...47 WIRING DIAGRAM Fig 46 Wiring Diagram...
Page 54: ...54 Fig 55 Boiler Lighting Shut Off Instructions...
Page 65: ...65 ILLUSTRATED PARTS LIST...
Page 66: ...66...
Page 67: ...67...
