Installation / Operation Instruction Manual

ManualsBrandsBradford White ManualsCommercialeF Series ® Ultra High Efficiency (EF) with ICON HD ® System, BMS Integration and Powered Anodes

Venting continued-

CAUTION

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 angling the intake away from the exhaust terminal,

increasing the distance between them, relocating the air intake to another side of the building, or using inside air for

combustion. Check to be sure the intake and exhaust terminals are not obstructed, especially during periods of below

freezing weather.

NOTICE

For installations in Canada, field supplied vent piping must comply with CAN/CGA B149.1 (latest edition) and be

certified to the Standard For Type BH, Class II, 65°C, Gas Venting Systems, ULC S636. Components of this listed

system shall not be interchanged with other vent systems or unlisted pipe/fittings. All components and specified primers

and cements of the certified vent system must be from a single system manufacturer and not intermixed with other

system manufacturer’s vent system parts. The supplied vent connector and vent termination are certified under ULC

S636 and are also certified as part of the water heater. Refer to the following tables for approved venting materials,

primers, and cements. All approved primers and cements are to be used within their marked time limitations.

Approved Venting Materials

For installations in the US only

• PVC DWV (ASTM D-2665)

• PVC Sch. 40 (ASTM-D1785)

• CPVC Sch. 40 (ASTM-F441, ASTM-D2846)

• PVC and CPVC (UL 1738, ULC S636)

• ABS Sch. 40 DWV (ASTM-D2661)

• Polypropylene (UL 1738, ULC S636)

• Stainless Steel (UL 1738, ULC S636)

For installations in CANADA

• ULC S636 approved PVC for flue gas

venting rated Class II, 65°C

• ULC S636 approved CPVC for flue gas

venting rated Class II, 65°C

• ULC S636 approved Polypropylene for flue

gas venting rated Class II, 65°C

• Stainless Steel (ULC S636)

Approved Primers and Cements

For installations in the US only

• PVC and CPVC Primer (ASTM-F656)

• PVC Cement (ASTM D-2564)

• CPVC Cement (ASTM F493)

• ABS Primer and Cement (ASTM D-2235)

For installations in CANADA

• ULC S636 approved Primer and Cement for

flue gas venting rated Class II, 65°C

NOTICE

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.

NOTICE

Before beginning installation of any vent pipe, read the vent pipe manufacturer’s installation instructions.

DO NOT install the water heater in any location where the ambient temperature may fall below freezing. Water heater

must be protected from freezing downdrafts during shutdown periods.

Provide protection of the building materials from degradation by flue gases from the exhaust vent terminal.