A.O. Smith 110, Инструкция по эксплуатации, Страница: 22 / 44

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This water heater has been design certified to be vented with PVC
pipe certified and marked as complying with ULC S636. This water
heater is supplied with a 2 inch 22.5 degree termination elbow that
is a special fitting that must be used with this appliance. Any outlet
piping, fittings and glue used to vent this appliance that is not supplied
by the manufacturer must comply with the ULC S636 requirements.
PVC Materials should use ASTM D-2564 Grade Cement; CPVC
Materials should use ASTM F-493 Grade Cement and ABS Materials
should use ASTM D-2235 Grade Cement.
If 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 above has been used, and that minimum
or maximum vent lengths and terminal location as detailed in this manual
have been met. Carefully inspect entire venting system for any signs
of cracks or fractures, particularly at joints between elbows and other
fittings and straight runs of vent pipe. Check system for signs of sagging
or other stresses in joints as a result of misalignment of any components
in system. If any of these conditions are found, they must be corrected in
accordance with venting instructions in this manual before completing
installation and putting water heater into service.
NOTE: A. For water heaters in locations with high ambient
temperatures (above 100°F) it is recommended that CPVC pipe
and fittings be used. B. A 22.5 degree elbow (2” vent pipe) or a 45
degree elbow (3” and 4” vent pipe) with an installed screen VENT
TERMINAL must be used in all cases.
4. There will be some installations where condensate will be formed
in the horizontal runs of the vent system. This condensate will
run into the condensate boot attached to the blower and out the
fitting. The water heater is shipped with condensate hose that
attaches to the fitting on the condensate boot. No other Tee or
fitting is required. See Figures 17, 20 and 21.
POLYPROPYLENE INSTALLATIONS
The water heater has been approved to be installed with
Polypropylene vent material as shown in Table 3 and Table 4. The
approved application of single wall, non-flexible, non-concentric
Polypropylene vent material is offered by two specific manufacturers
(Centrotherm ECO Systems and DuraVent Polypropylene). These
listed products must be installed by following the vent manufacturer’s
instructions. Refer to Table 2 on Page 21 to determine the maximum
pipe length and number of elbows that can be used.
Insulation should not be used on Polypropylene venting materials.
The use of insulation will cause increased vent wall temperatures,
which could result in vent pipe failure.
Use only the adapters and vent system listed in Tables 3 and
4 on page 21. DO NOT mix vent systems of different types or
manufacturers. Failure to comply could result in severe personal
injury, death, or substantial property damage.
Installations must comply with applicable national, state, and local
codes. For Canadian installation, Polypropylene vent must be
listed as a ULC-S636 approved system. If Polypropylene vent is
not required by your local code, you may use either PVC or CPVC
pipes for your water heater that allows non-metallic venting material
installations.
Polypropylene vent systems do not use cement to connect the pipe
and elbow sections but use a push together gasket seal method.
Do not attempt to connect Polypropylene with sealant cement. All
vent connections MUST be secured by the vent manufacturer’s joint
connector. The installer must use a specific vent starter adapter at
the flue connection. The adapter is supplied by the vent manufacturer
to adapt to its vent system.
In order to be in full compliance with UL 1738 or ULC-S636 and to
meet the requirements of the water heater manufacturer, you must use
the metal joint connector rings, available from the Polypropylene vent
manufacturer, to stiffen the joints of 2”, and 3” diameter pipes.
CONDENSATE
This water heater is a condensing unit and requires a drain to be located
in close proximity to allow condensate to drain safely. One hose from
blower housing, two flexible hoses from blower outlet adaptor, along with
another flexible hose from VAA if installed, run to barb fittings on vent
pipe assembly #2. Hose is clamped by rubber clips and flexible hoses
by a clamp on jacket top cover. See Figure 17. Condensate drains from
the unit at the exhaust tee located at the bottom of the unit (see figure
16). Condensate from this water heater is mildly acidic. Please note
that some local codes require that condensate is treated by using a pH
neutralizing filter prior to disposal.
NOTE: It is important that the field supplied drain lines beyond
the 1/2” adaptor of vent pipe assembly #1 should be installed
continuously tilted downward toward an appropriate drain. See Figure
16. If these instructions are not followed or if condensate drain line
is blocked, water will spill from condensate trap. Do not block the
holes in the hex plug on top of a small tee in vent pipe assembly
#1. As with every water heater installation, a drain pan should be
used to prevent water damage to surrounding area. If necessary,
a condensate pump with an incorporated reservoir may be used to
pump water to an appropriate drain. To avoid condensate spillage,
select a pump with an overflow switch.
Caution must be used to ensure that drain is free and clear of debris
and will not allow backflow through the condensate drain line.
Consideration must be given to avoid freezing of the condensate
lines which could result in excessive build up of condensate inside
the water heater. Waterproof heat tape may be required to prevent
freezing of condensate lines. Please ensure that the outlet of
condensate drain does not create a slippery condition which could
lead to personal injury. Care should be taken to ensure there is no
kink or twist in any condensate hose. If a VAA is not installed, the
unused barb fitting in vent pipe assembly #2 should be plugged using
one of the break-away plugs.
Breathing Hazard - Carbon Monoxide Gas
•
Do NOT block the holes in the hex plug of vent pipe
assembly #1.
•
Do NOT elevate any portion of the field supplied drain
line beyond the 1/2" adaptor above the adaptor. This
must be true for entire length of the drain line including
the exit into an appropriate drain.
•
Condensate lines must be free and clear of debris and
must not allow back flow through drain line. Condensate
lines must be able to flow freely to an appropriate drain.
•
Do not allow condensate lines to become crimped closed.
•
Analyze entire vent system to make sure that condensate
will not become trapped in a section of vent pipe and
therefore reduce open cross sectional area of vent.
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.