Venting Installation - Hatco Powermite PMG-100 Manuel D'installation Et D'utilisation

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Venting Installation

The PMG-100 and PMG-200 may be vented by two methods,
both of which have been tested for compliance with national
safety standards for gas water heaters. Whichever method
is used must comply with local codes. The installation of
the venting system must comply with local codes and in the
absence of local codes, in accordance with the National Fuel
Gas Code and the guidelines in this manual. Before installing
any method of venting, contact the local code authority of
your gas supplier to make sure that the final installation
will be acceptable to the authorities having jurisdiction.
The proper method of venting a power vented gas appliance
is too complicated to cover in this manual and is explained
in detail in the National Fuel Gas Code. Before installing the
venting system, the person or agency making the installation
must be familiar and experienced with the guidelines of the
National Fuel Gas Code.
The temperature of the flue gases from this booster water
heater operates at approximately 225°F to 275°F (107°C to
135°C).
The two methods that have been tested for compliance with the
national safety standards are:
1. The first method of venting permits the connection of
4" (102 mm) diameter, AL 29-4C1 stainless steel vent
pipe. Use only Duravent "FasNSeal" products currently
listed to ANSI/UL 1738 by a nationally recognized testing
agency for category III venting. The maximum combined
horizontal vent length must not exceed a length of 40
feet (12 m) [each sweep elbow is the equivalent of 5'
(1.5 m) of straight pipe and a standard right elbow is
the equivalent of 10' (3 m)]. Venting shall be installed per
vent pipe manufacturer's instructions. The venting may be
done in such a way that the exhaust products are:
a. Conveyed to another area in the kitchen such as under a
ventilator or near an exhaust fan (both of which exhaust
outdoors).
When using this method the booster water heater must
be electrically interlocked with the vent hood to prevent
operation if the vent hood is not operating.
The termination end must be placed so that it vents
above the bottom of the hood skirt. Do not penetrate the
filter with the vent.
b. Horizontally vented through an outside wall directly
to the outdoors. See the additional instructions and
illustration below.
c. Exhausted into a vertical masonry chimney that has
a listed steel liner installed in the chimney. Locate
appliance as close as practicable to a chimney or gas
vent. Because of the low flue gas temperature, do not
vent into an unlined or masonry lined chimney designed
to burn solid fuel. Note that all venting into a vertical
chimney of any type must comply with the horizontal and
vertical ratios and sizing requirements that are detailed
in the National Fuel Gas Code.
d. For Model PMG-100 only: Vented vertically using type
B vent pipe that is 5" (127 mm) in diameter provided the
termination above the roof uses a listed wind cap.
1
AL 29-4C is a Registered Trademark of Allegheny Ludlum Corp.
PMG100200M-0222
Vent Pipe should not
penetrate filter.
Venting Through Typical Exhaust System
2. The second method of venting is to directly exhaust the
flue products into the kitchen work area provided the size
and installation of the open room meet the requirements of
the National Fuel Gas Code [ANSI Z223.1 or NFPA bulletin
#54]. A portion of the 1996 code is as follows.
Excerpt From ANSIZ223.1/NFPA #54
7.2.1 Connection To Venting Systems. Excerpt as
permitted in 7.2.2 through 7.2.6, all gas utilization equipment
shall be connected to venting systems.
7.2.2 Equipment Not Required To Be Vented. A single
booster-type [automatic instantaneous] water heater, when
designed and used s rinse requirements of a dishmachine,
provided that the equipment is installed, with the draft hood in
place and unaltered, if a draft hood is required in a commercial
kitchen having a mechanical exhaust system. Where installed
in this manner, the draft hood shall not be less than 36" (91
cm) vertically and 6" (15 cm) horizontally from any surface
other than the equipment.
Where any or all of this equipment is installed so the
aggregate input rating exceeds 20 BTU per hr per cu ft
(207 watts per m3) of room space in which it is installed, one or
more shall be provided with venting systems or other approved
means for removing the vent gases to the outside atmosphere
so the aggregate input rating of the remaining unvented
equipment does not exceed the 20 BTU per hr per cu ft
(207 watts per m3) figure. Where the room or space in which
the equipment is installed is directly connected to another
room or space by a doorway, archway, or other opening
of comparable size that cannot be closed, the volume of
adjacent room or space shall be permitted to be included in
the calculation.
17
INSTALLATION