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BLOWER ASSEMBLY INSTALLATION
1. This power vented water heater comes with blower
assembly installed (see Figure 30).
2. After unit is set in place, make sure blower assembly is
still mounted securely. Make sure there is no damage
to blower.
HOSE
CONNECTION
PORT FOR
CONDENSATE
DRAIN
DILUTION
AIR
INLETS
8 in.
(200mm)
LOOP
TO
DRAIN
BLOWER
ASSEMBLY
Figure 30
3. Make sure there is no packing material in the inlet or
discharge of the blower.
4. Make sure that the plastic tubing is still attached
from the air pressure switch to the port on the blower
housing. Make sure the plastic tubing is not folded
anywhere between the pressure switch and the blower
housing (see Figures 38-42).
5. This water heater is a polarity sensitive appliance and
will not operate if the power supply polarity is reversed.
Power to this water heater must be wired properly
(correct polarity).
6. Do not plug in power cord until vent system is
completely installed. The Power Vent operates on 110
-120 VAC. therefore a grounded outlet must be within
reach of the 6 foot (1.8 m)
fl
exible power cord supplied
with the heater. The power cord supplied may be used
on a unit only where local codes permit. If local codes
do not permit use of
fl
exible power supply cord:
a. Make sure the unit is unplugged from the wall outlet.
Remove the screw and open panel on the front of
the junction box on the blower.
b.
Cut
the
fl
exible power cord, leaving enough to be
able to make connections. Remove the strain relief
fi
tting from the box.
c. Install a suitable conduit fitting inside the
enclosure.
d.
Splice
fi
eld wiring into existing wiring using code
authorized method (wire nuts, etc).
e. Be certain that the neutral and line connections are
not reversed when making these connections.
f. Ground heater properly. This water heater must
be grounded in accordance with the
National
Electrical Code NFPA 70
and/or local codes. These
must be followed in all cases.
The water heater must be connected to a grounded
metal, permanent wiring system or an equipment
grounding conductor must be run with the circuit
conductors and connected to the equipment
grounding terminal or lead on the water heater (see
Figure 13; the wiring diagram).
g. Close the panel on the junction box. Make sure that
the access panel is secured shut.
7. The blower discharge boot is made to accept only
straight sections of 2” or 3” pipe. To start off with an
elbow, a short section of the straight pipe must be cut
and glued into the end of the elbow that will mount on
the discharge boot.
INSTALLATION OF VENT SYSTEM
Before beginning installation of piping system, thoroughly
read the “Vent Pipe Preparation” section of this manual.
PLANNING THE VENT SYSTEM
Plan the layout of the vent system from the vent termination
to the water heater considering all of the 90 degree and 45
degree elbows plus the number of feet of pipe that would
be needed to install the total vent system. The water heater
must be vented to the outdoors as described in these
instructions. This water heater must be vented separately
from all other appliances.
The unit may be vented horizontally through a wall or
vertically through the roof. Pipe runs must be adequately
supported along both vertical and horizontal runs.
Note:
Do not use an elbow as a support point. Elbows are
not designed to cary the load or stresses of the venting
system if they are rigidly held.
It is imperative that the
fi
rst hanger (or support) be located
on the horizontal run immediately adjacent to the
fi
rst 90-
degree elbow from the vertical rise. Support method used
should isolate the vent pipe from the
fl
oor joists or other
structural members to prevent the transmission of noise
and vibration. Do not support, pin, or otherwise secure
the venting system in a way that restricts the normal
thermal expansion and contraction of the chosen venting
material.
If the water heater is being installed as a replacement for
an existing power vented heater in pre-existing venting,
a thorough inspection of existing venting system must be
performed prior to any installation work. Verify that correct
material, as detailed in below, has been used, and that the
minimum or maximum vent lengths and terminal location
as detailed in this manual have been met.
HIGH AMBIENT TEMPERATURE INSTALLATIONS
This heater requires room air to lower the flue gas
temperatures before the gases pass through the vent
system. The dilution air inlets are located on the rear of
the blower assembly (see Figures 2 & 30).
As the room temperature rises, the ability to lower the
fl
ue
gases lessens so special attention to the choice of venting
material is required. Establishing the ambient temperatures
where the heater and the venting is installed is very
important, especially in regions with warmer climates
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