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8
Wiring a Power Vent Assembly
to an Appliance with IID
Ignition
Venting
The vent pipe must be the same size or one size larg-
er than what is indicated. The D-2 Power Vent is
capable of 360-degree discharge rotation and oper-
ates with a positive vent static pressure and with a
vent gas temperature less than 400°F. The total
length of horizontal run shall not exceed an equiv-
alent of 40 feet including termination cap. For all
cases, each 90-degree elbow reduces the maximum
horizontal vent run by 10 feet and each 45-degree
elbow in the vent run reduces the maximum vent run
by 5 feet. See the table below for maximum vent
lengths using 90-degree and 45-degree elbows.
The D-2 Power Vent uses positive pressure to push
flue gases through the vent pipe to the outside. 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 rec-
ommended that:
a) The vent be installed with a slight downward slope
of not more than 1/4” per foot of horizontal run to the
vent terminal.
b) The vent be insulated through the length of horizon-
tal run.
For appliances installed in extreme cold climate, it is
recommended that:
a) The vent be installed with a slight upward slope of
not more than 1/4” per foot of horizontal run to the vent
terminal. In this case, an approved condensate trap
must be installed per applicable codes.
b) The vent be insulated through the length of the hor-
izontal run.
Fig. 4: Draft Assembly
The Raypak Power Vent operates with a positive vent
static pressure and with a vent gas temperature that
avoids excessive condensate production in the vent
and as such it is listed as a CATEGORY III appliance.
Exception: When a Power Vent is connected to a ver-
tical vent of sufficient height to generate a negative
draft in the system. Consult sizing guide or factory.
The D-2 Power Vent assembly is suitable for through
the wall venting, and for connection to smaller size
vent pipes and breeching other than the standard
atmospheric heater.
WARNING: Disconnect all electrical power to the
unit before servicing to avoid potential shock injury
or damage to the unit. To change voltages, follow
wiring diagram for correct voltage connections.
Improper wiring connections can burnout the relay
and blower motor.
90 Degree Elbows 45 Degree Elbows
Quantity
Maximum
Length (ft)
Quantity
Maximum
Length (ft)
1 30 1 35
2 20 2 30
3 10 3 25
Table C: Reduced Maximum Equivalent Vent Run
LEFT SIDE
4"
DIAMETER