Locating Pump-Mounted Water Heater With Respect To Storage Tank(S); Locating Appliance For Correct Horizontal Vent/Ducted Air Distance From Outside Wall; Section 2. Venting And Combustion Air; Combustion Air - Bradford White BWCV Installation And Operation Instructions Manual

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Page 6
Heater Vent Collar
Size Size
cm
in.
15
500 6
20
750 8
25
1000 10
30
1250 12
30
1500 12
36
1750 14
36
2000 14
Appliance Clearance From
Surface Combustible Material
inches
Left Side
Right Side
Top
Back
Front
Vertical
(Category 1) 6*
Vent
Horizontal per UL1738 venting
(Category 3) system supplier's
Vent
*1" (2.5cm) when b-vent is used.
**When vent and/or combustion air connects to the back,
recommended clearance is 36" (91cm).
Table 2. Clearances.
1.6 Locating Pump-Mounted Water Heater
with Respect to Storage Tank(s)
For best results, a pump-mounted water heater
should be located within 15 feet (4.6m) of the storage
tank(s). The pump is sized for 30 feet (9.1m) of piping.
If the heater must be installed with longer piping
runs, then larger diameter pipe or tubing shall be used.
Consult the factory for assistance.
1.7 Locating Appliance for Correct
Horizontal Vent/Ducted Air Distance
From Outside Wall
The forced draft combustion air blower/blowers
in the appliance has/have sufficient power to pull air
and vent properly when the following guidelines for
horizontal air and vent are followed (see Table 1).
NOTE: On models 750-2000, the vent collar size is
larger than the size of the vent pipe that can be used.
Vent collar size and horizontal pipe diameters can
be found in Table 1. The larger vent collar size is to
accommodate Category I (vertical) vent systems.
Horizontal Air Collar
Vent Pipe & Pipe
Diameter Diameter
cm
in. in
15
6 6
15
6 6
20
8 8
20
8 8
20
8 8
20
8 8
30
12 12
Table 1. Horizontal Vent / Combustion Air Parameters.
Required Recommended
Service Access
Clearance
cm
inches
2.5
1 24
2.5
1 24
2.5
1 12
2.5
1 **12**
2.5
1 36
15.2*
instructions
Max. Pipe Max. No.
Length of Elbows
cm m
ft.
15 15
50
15 15
50
20 15
50
20 15
50
20 15
50
20 15
50
30 15
50
NOTE: When located on the same wall, the
combustion air intake terminal must be installed
a minimum of 12" (30cm) below the exhaust vent
terminal and separated by a minimum of 36 inches
cm
(91cm) horizontally.
61
The air intake terminal must be installed high
61
enough to avoid blockage from snow, leaves and other
30
debris.
30**
91
SECTION 2.
Venting and Combustion Air

2.1 Combustion Air

Copper Brute II water heaters must have
provisions for combustion and ventilation air in
accordance with section 5.3, Air for Combustion and
Ventilation, of the National Fuel Gas Code, ANSI
Z223.1, or Sections 7.2, 7.3 or 7.4 of CSA B149.1,
Installation Codes, or applicable provisions of the local
building codes.
A Copper Brute II heater may receive
combustion air from the space in which it is installed,
or it can be ducted directly to the unit from the outside.
Ventilation air must be provided in either case.

2.1.1 Combustion Air From Room

In the United States, the most common
requirements specify that the space shall communicate
with the outdoors in accordance with method 1 or 2,
which follow. Where ducts are used, they shall be of
the same cross-sectional area as the free area of the
openings to which they connect.
Method 1: Two permanent openings, one
commencing within 12 inches (30 cm) of the top
and one commencing within 12 inches (30 cm) of
the bottom, of the enclosure shall be provided. The
openings shall communicate directly, or by ducts,
with the outdoors or spaces that freely communicate
with the outdoors. When directly communicating
with the outdoors, or when communicating to the
outdoors through vertical ducts, each opening shall
have a minimum free area of 1 square inch per 4000
Btu/hr (5.5 square cm/kW) of total input rating of all
equipment in the enclosure. When communicating to
Bradford White
Side Wall
Vent
Terminal
Part Number
3 CA001401
3 CA001401
3 CA001402
3 CA001403
3 CA001403
3 CA001403
3 CA001404
Side Wall
Combustion
Air Terminal
Part Number
20260701
20260701
20260703
20260703
20260703
20260703
20260706