User Guide

33
Vent Pipe Installation
The following guidelines should be followed when installing
the air intake and exhaust vent system:
• Venting should be as direct as possible with a minimum
number of pipe fi ttings.
• Vent diameter must not be reduced unless specifi cally
noted in the installation instructions.
• Support all horizontal pipe runs every 4 ft. and all
vertical pipe runs every 5 ft. or according to local codes
or venting manufacturer’s instructions.
• Vents run through unconditioned spaces where
below freezing temperatures are expected, are not
recommended.
• Vents run through unconditioned spaces inside a
building may result in the condensation of fl ue gases
during the winter season. The rubber coupling joined to
the blower includes a nipple with a cap. In installations
such as this connect a condensation trap to this nipple.
The combustion air intake and exhaust vent system and
termination may be installed in one of the following type
terminations:
1. Concentric Vent Termination (horizontal/side wall
installation).
2. Concentric Vent Termination (vertical/roof installation).
All pipe, fi ttings, pipe cement, primers and procedures
must conform to American National Standard Institute and
American Society for Testing and Materials (ANSI/ASTM)
standards. This water heater has been design certifi ed by
CSA International for use with the specifi ed (CSA) listed
plastic vent pipe.
• Primers and cements are
extremely flammable, and must
not be stored or used near heat
or open flame.
• Also, use only in a well venti-
lated area.
Fire Hazard
WARNING
• Cans of cement and primer should
be closed at all times when not in
use to prevent evaporation of
chemicals and hardening of cement.
• They are also very flammable and
should be kept away from heat or
flame.
Fire Hazard
WARNING
Do not use solvent cement to connect the exhaust vent
system to the blower. Use the rubber coupling and gear
clamps instead. This connection must be removable to
service the heater. All other joints in the air intake and
exhaust vent systems must be properly joined and sealed.
Vent Pipe Runs
1. The exhaust vent system must not, under any
circumstances, be run downhill then run uphill thus
forming a valley. It may leave a space to accumulate
condensation and block vent pipe.
2. Horizontal runs require a minimum 1/8 in. rise per 5
ft. and a support every 4 ft. or according to venting
manufacturer’s instructions. Ensure there is enough
height between heater and termination to raise vent
pipe runs the required distance.
3. Vertical runs require a support every 5 ft. that must
provide proper support to prevent stress on the pipes
or according to venting manufacturer’s instructions.
Vent Terminal Installations
Important: The vent system must terminate so that proper
clearances are maintained as cited in local codes or the
latest edition of “National Fuel Gas Code”, ANSI Z223.1/
NFPA 54.
In addition, the manufacturer recommends the vent
terminal not to be installed closer than 6 in. from an inside
or outside corner.
Plan the vent system layout so that proper clearances are
maintained from plumbing and wiring. Vent pipes serving
power vented appliances are classifi ed by building codes as
“vent connectors”. Required clearances from combustible
materials must be provided in accordance with information
in this manual under “Locating The New Water Heater”
and with the latest edition of “National Fuel Gas Code”,
ANSI Z223.1/NFPA 54 and local codes.
BLOWER ASSEMBLY INSTALLATION
1. This power vented water heater comes with blower
assembly installed.
2. After unit is set in place, make sure blower assembly is
still mounted securely. Make sure there is no damage
to blower.
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 motor
housing. Make sure the plastic tubing is not folded
anywhere between the pressure switch and the blower
motor housing (see Figure 37 & Figure 38).
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 Direct Vent operates
on 110 -120 VAC. therefore a grounded outlet must be
within reach of the 6 foot 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.