9
VENT PIPING SYSTEM
GENERAL INFORMATION
DANGER
PROPER VENT PIPE INSTALLATION IS CRITICAL TO THE SAFE
OPERATION OF THIS WATER HEATER. FAILURE TO PROPERLY VENT
THIS WATER HEATER CAN CAUSE AN EXPLOSION, FIRE OR CARBON
MONOXIDE POISONING WHICH CAN RESULT IN PROPERTY DAMAGE,
PERSONAL INJURY, OR DEATH.
This water heater has been certified by CSA International for use with the
specified plastic pipe material.
This vent pipe system must be installed in accordance with the “National Fuel
and Gas Code”, NFPA 54, ANSI Z223.1 - Latest Edition.
The National Fuel and Gas Code allows the use of plastic pipe for venting if it is
accepted by the local code or the authority having jurisdiction.
Some local jurisdictions may be opposed to plastic vent pipe. Check with your
local code official before installing this system.
Use only 3 inch Schedule 40 PVC, ABS-DWP, or CPVC plastic pipe and fittings
for this vent pipe system. All fittings must be Long Sweep. DO NOT USE SHORT
RADIUS OR MEDIUM SWEEP FITTINGS.
THE USE OF SHORT RADIUS
FITTINGS WILL CAUSE THIS WATER HEATER TO MALFUNCTION OR
NUISANCE TRIP ON THE PRESSURE SWITCH CAUSING THE BURNER TO
NOT OPERATE PROPERLY.
Pipe and fittings are available from your water heater dealer or through most
plumbing supply houses.
BLOWER OUTLET ADAPTER
The blower outlet adapter must be secured to the outlet of the power vent
blower opening using silicone
adhesive sealant and sheet metal
screws as shown in Figure 9.
1. Apply an even 1/8 inch bead of
silicone adhesive sealant
around the inside of the
adapter’s square opening.
Locate this bead 1/4 inch from
the top of the opening.
1. Slide the adapter approximately
1/2 inch onto the blower
opening and secure with two
sheet metal screws.
IMPORTANT:
This connection must
be properly sealed to prevent the leakage of the products of combustion into the
living area. Excess silicone adhesive inside the adapter can cause enough
restriction in the vent pipe to cause intermittent burner operation.
VENT PIPE INSTALLATION
When installing this vent pipe system, please note the following:
•
Use only Schedule 40 PVC, CPVC, or ABS-DWV plastic pipe and fittings.
•
Maximum vent pipe length is 40 feet with three 90 degree
long sweep
elbows.
•
The minimum clearance from plastic vent pipe to combustible materials is 0
(zero) inches.
•
Venting should be as direct as possible with a minimum pipe length and
fittings.
•
Vent diameter must not be reduced.
•
Support all fittings and pipe runs with proper pipe hold-down hardware at
least every three feet.
•
Do not use damaged pipe or fittings.
•
All joints must be properly cemented.
•
Vent piping installed in unconditioned spaces must be properly insulated
•
Make sure the inside of the pipe is clean and free of cuttings and loose dirt.
•
Size and cut all piping before cementing. Make clean, square cuts.
•
Do not connect this venting system with an existing vent or chimney.
•
Do not common vent with the vent pipe of any other water heater or
appliance.
•
Do not run plastic vent pipe through a fire break wall.
•
Do not screw, nail, rivet or make any holes in the vent pipe or fittings.
•
Do not turn on the water heater until the adhesive has completely cured.
DANGER
CONNECTION OF THE VENT PIPE TO THE OUTLET OF THE VENT
ASSEMBLY BLOWER MUST BE PROPERLY SEALED TO PREVENT
LEAKAGE OF THE PRODUCTS OF COMBUSTION INTO THE LIVING SPACE.
IMPORTANT:
Fittings such as elbows and couplings must not be attached
directly to the blower outlet. A short length of vent pipe (2 inches minimum)
must be used to connect an elbow or coupling to the blower outlet as shown
in Figure 10.
Use silicone adhesive sealant to secure the vent pipe to the blower outlet. Use
a good grade of pipe cement to secure the vent pipe and fittings to each
other.
For PVC, CPVC, and ABS pipe:
1. Cut the pipe ends square, remove the ragged edges and burrs.
2. Chamfer the pipe end, apply a primer to the fitting and pipe.
3. Apply an even coat of a good grade of pipe cement inside the fitting.
Apply a liberal amount of cement to the outside of the pipe to socket
depth.
4. Assemble the parts quickly while the cement is still wet. Twist the pipe 1/4
turn during insertion and hold together for 30 seconds.
5.
Wipe off the excess cement and do not handle for 15 minutes. Cure time
will vary according to temperature, humidity, and fit.
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