Bradford White UCG100H199 Installation & Operation Manual page 15

For installations in the US only
• PVC Sch. 40 (ASTM D-1785, ULC 1738, ULC
S636)
• DWV PVC Sch. 40 (ASTM-D2665)
• CPVC Sch. 40 (ASTM-F441, ASTM-D2846, ULC
S636)
• Polypropylene (UL 1738, ULC S636)
• ABS Sch. 40 DWV (ASTM D2661)
For installations in the US only
• PVC and CPVC Primer (ASTM F-656)
• PVC Cement (ASTM D-2564)
• CPVC Cement (ASTM F493)
• ABS Primer and Cement (ASTM D-2235)
Use of cellular core PVC (ASTM F891). Cellular core CPVC, or Radel® (polyphenosulfone) in non-metallic
venting systems is prohibited and covering non-metallic venting with thermal insulation is prohibited.
Check to make sure flue gases DO NOT recirculate into the air intake terminal when using direct venting. If the
water heater is having service issues, flue recirculation may be a contributing factor. Even when the minimum
vent terminal separation distances are followed, recirculation may still occur depending upon the location
outside the building, the distance from other buildings, proximity to corners, weather conditions, wind patterns,
and snow depth. Periodically check to make sure that flue recirculation is NOT occurring. Signs of flue gas
recirculation include frosted or frozen intake terminals, condensate in the intake terminal and venting system,
oxidation or white chalk material on the flame sensor or igniter shield. Correction to flue recirculation may
involve relocating the air intake to another side of the building or using inside air for combustion. Check to be
sure the intake is NOT obstructed, especially during periods of below freezing weather.
High levels of dust and debris such as road and construction dust, insects, and tree pollen may clog the burner
resulting in poor performance and damage to the water heater. Avoid air intake locations where debris can be
created such as exhaust ventilation hoods, gravel parking lots, and near outdoor spotlights that attract bugs.
For these installations, an air intake filter kit is available as an accessory service part from the installer of this
water heater. The air intake filter kit is NOT designed to filter out airborne contaminants or chemicals that may
damage the water heater.
Approved Intake Venting Materials
Approved Primers and Cements
NOTICE
CAUTION
For installations in CANADA
• ULC S636 approved Sch. 40 PVC and CPVC for
flue gas venting rated Class II, 65°C (components
provided with water heater)
• ULC S636 approved Polypropylene for flue gas
venting rated Class II, 65°C
For installations in CANADA
• ULC S636 approved PVC Primer and Cement for
flue gas venting rated Class II, 65°C
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