Venting; Termination Screen - Giant PV1 Owner's Manual

INSTALLATION INSTRUCTIONS
Should the water heater fail, due to exposure to
WARNING
such a corrosive atmosphere, the warranty is void.

Venting

DANGER
When installing the venting system, make sure to
AVERTISSEMENT
follow all local codes or, in the absence of local
codes, CAN/CSA B149.1, Natural Gas and
Propane Gas Installation Code, in Canada and/
or the National Fuel Gas Code, ANSI Z223.1/
NFPA 54, in the United States. Never operate the
water heater unless it is properly ventilated to the
outdoors and has adequate air supply for proper
operation. Failure to properly install the venting
system could result in property damage, personal
injury or death.
Before installing the vent piping, make sure that the
vent system layout has been properly planned. Verify
that the location of the water heater respects all
clearances from combustible material, all venting
requirements (see Table 1) and that the vent terminal
will be installed as specified by all local codes or, in the
absence of local codes, CAN/CSA B149.1, Natural Gas
and Propane Installation Code, in Canada and/or the
National Fuel Gas Code, ANSI Z223.1/NFPA 54, in the
United States (see Figure 11).
This water heater is equipped with a power venter
that evacuates the products of combustion to the
outdoors. All models are shipped from the factory
with the power venter already installed.
This water heater must be vented directly to the out-
doors, either horizontally through the wall or vertically
through the roof. The venting must not be attached
to an existing chimney or in common with any other
appliance and must not be insulated. Only two (2)
inch (5.1 cm) or three (3) inch (7.6 cm) schedule 40
PVC or CPVC pipe and fittings may be used to
vent this water heater. The pipe and all the fittings
must be permanently joined using the appropriate
primer and solvent-based cement. Horizontal runs
of vent pipe must be supported every three (3)
feet (91 cm) and vertical runs of vent pipe must be
supported every five (5) feet (1.5 m).
Table 1
PV1 Models only
VENT PIPE DIAMETER
Maximum equivalent length*
Minimum equivalent length*
One 45˚ elbow is equivalent, in straight pipe, to
One 90˚ elbow is equivalent, in straight pipe, to
* Note: Outdoor termination elbow not to be counted when determining total length.
MAXIMUM EQUIVALENT LENGTH OF VENT PIPE - DO NOT EXCEED
According to the CAN/CSA-B149, Natural Gas and
Propane Installation Code, plastic vent systems
installed in Canada must be certified to the STANDARD
FOR TYPE BH GAS VENTING SYSTEMS, ULC S636.
Components of the certified vent system must not be
interchanged with other vent systems or unlisted pipe/
fittings. Plastic components and specified primers and
glues of the certified vent system must be from a single
vent system manufacturer and not intermixed with
other vent system manufacturer's vent system parts
unless those are certified to be used with this system.
Plastic vent systems shall also be installed such that
the first three (3) feet (91 cm) of pipe from the water
heater outlet is readily accessible for visual inspection.

Termination screen

A restrictor screen (see Figure 9) is provided with the
following Energy Star models (see Table 2). The two
(2) inch (5.1 cm) restrictor screen must be installed and
glued, and the wire mesh shall be removed from the
vent termination elbow when total equivalent length is
thirty (30) feet (9.1 m) or less of two inch vent pipe, oth-
erwise a standard wire mesh screen shall be installed.
When using three (3) inch vent pipe a standard wire
mesh must be installed in all cases (see Table 3).
Figure 8
UG40, UG50 and UG60
2 inches
50,0 feet (15,2 m)
7,5 feet (2,3 m)
3,0 feet (0,9 m)
5,0 feet (1,5 m)
7
3 inches
140,0 feet (42,7 m)
9,5 feet (2,9 m)
4,0 feet (1,2 m)
7,0 feet (2,1 m)