14
If the vent and/or combustion air intake piping configurations
covered in the Water Heater Manual cannot be applied to a spe-
cific installation, contact Giant for assistance. Other configura-
tions may be available.
N O T I C E
DANGER
WARNING
CAUTION
AVERTISSEMENT
ATTENTION
Installations must comply with local requirements and with the
National Fuel Gas Code, ANSI Z223.1/NFPA 54 for U.S. instal-
lations or CSA B149.1 for Canadian installations.
DO NOT
use
cellular core PVC, CPVC, or Radel based pipe materials for the
exhaust vent. Vents
MUST
be of solid core pipes ONLY.
DANGER
WARNING
CAUTION
AVERTISSEMENT
ATTENTION
Use only the materials listed in the Water Heater Manual for
vent, combustion air intake pipe, and fittings (
see Table 9
). Fail-
ure to comply with this warning could result in severe substan-
tial property damage, personal injury, or death.
DANGER
WARNING
CAUTION
AVERTISSEMENT
ATTENTION
If used, a masonry chimney can ONLY be used as a PIPE CHASE
for the exhaust and combustion air intake pipes. The exhaust
and air piping must be installed as instructed in this guide and
applicable Water Heater Manual. The chimney must be used
only for Water Heater(s) vent chase. NO OTHER appliance or
fireplace can be connected to the chimney. Exhaust and air pip-
ing materials must comply with this instruction. The chimney
must be fitted with a sealed access opening to facilitate interior
inspection. The chimney chase (and liner, if installed) to be in-
spected annually for any degradation. Failure to comply could
result in substantial property damage, personal injury, or death.
Installation Instructions
Installation Requirements
• Installation should be performed by a licensed professional.
• All PVC/CPVC IPEX Concentric Vent Kit (CVK) assemblies are
certified to ULC S636. Where ULC S636 compliance is required,
use only System 636 pipe, fittings, and cement at terminal con-
nection.
•
DO NOT
mix pipe, fittings, cements, or joining methods from
different vent manufacturers, this can result in unsafe conditions
and will void the certification.
•
DO NOT
use cellular core PVC, CPVC, nor Radel piping for vent.
•
DO NOT
use PVC/CPVC on Non-Condensing Units.
•
DO NOT
operate unit until venting is completely installed and all
solvents and glues have bonded.
• All PVC/CPVC exhaust vent material used in Canada must be
S636 certified.
If the preferred venting option is a twin pipe PVC/CPVC configura-
tion, the approved twin pipe adaptor must be used.
For further details on listed PVC/CPVC venting material (
see Table
9
) refer to the installation manual of the PVC/CPVC manufacturer.
NOTE:
The listed vent, vent fittings, termination, cleaner, and glue
are all certified as part of the water heater vent system.
DANGER
WARNING
CAUTION
AVERTISSEMENT
ATTENTION
Failure to correctly install vent and combustion air intake pipes of
the water heater to atmosphere as outlined in the VENTING sec-
tion of the Installation Instructions, will result in death from as-
phyxiation (from carbon monoxide), fire, or explosion.
NEVER
operate the water heater without proper venting (exhaust and
combustion air intake). Always inspect the vent terminal unit,
combustion air intake pipe, and the entire vent system affixed to
the water heater for proper installation at equipment commis-
sioning and at least annually thereafter.
TWIN PIPE VENTING GUIDE
TWIN PIPE VENTING GUIDE
Item
Material
Standard for Installation in North America
United States
Canada
Thermoplastic Piping Materials
Vent or combustion air
intake pipe & Fittings
PVC schedule 40
ANSI/ASTM D1785
Thermoplastic vent pipe must be certified to
ULC S636.
Intake pipe may be of any material listed (left).
PVC-DWV
ANSI/ASTM D2665
CPVC schedule 40
ANSI/ASTM F441
PVC pipe cement &
primer
PVC
ANSI/ASTM D2564
CPVC
ANSI/ASTM F493
IPEX bird screens (purchase separately)
Termination Vent
Screens
Polyethylene
Three (3) inch (7.6 cm) Vent screen: IPEX part # 196051;
Four (4) inch (10.2 cm) Vent screen: IPEX part # 196052
(Screens are friction fitted inside termination fitting bells.)
Table 9: Vent and Air Piping Materials