Rheem RGDG, Installation Instructions Manual

Page: 14 / 48

14
“B-1” VERTICAL VENTING
Type “B-1” vents must be installed in
accordance with the terms of their
listings and the vent manufacturer’s
instructions.
“B-1” vents must be supported and
spaced in accordance with their listings
and the manufacturer’s instructions. All
vents must be supported to maintain
their minimum clearances from
combustible material.
VERTICAL VENTING
Categorized
Furnace Vent
Input Size Required
45K 3
(
50K 3
(
67K *4
(
75K *4
(
100K *4
(
125K *4
(
150K *5
(
*NOTE: All furnaces have a 3
(
vent
connection as shipped from the factory. A 3
(
to 4
(
or 3
(
to 5
(
vent transition is required on
all but the 45,000 and 50,000 BTUH models
when vertically vented or common vented
with metal vent pipes.
THE VENT
TRANSITION CONNECTION MUST BE
MADE AT THE FURNACE VENT EXIT.
It
must originate with an adapter if required, at
the furnace flue collar and terminate either
in a listed cap or roof assembly. When
common venting, the vent connector size
may differ from the above diameters
depending on application. See ANSI
Z21.47-1993/CAN/CGA-2.3-M93 or latest
edition tables.
VERTICAL VENT SYSTEMS:
1. A gas vent shall terminate above the
roof surface with a listed cap or
listed roof assembly. Gas vents 12
inches in size or smaller with listed
caps shall be permitted to be
terminated in accordance with
Figure 11, provided they are at least
8 feet from a vertical wall or similar
obstruction. All other gas vents shall
terminate not less than 2 feet above
the highest point where they pass
through the roof and at least 2 feet
higher than any portion of a building
within 10 feet.
2. A type B gas vent shall terminate at
least 5 feet in vertical height above
the highest connected equipment
draft hood or flue collar.
3. Must rise 1 ⁄
4
(
per foot away from the
furnace on horizontal runs and be
supported with straps or hangers so
it has no sags or dips. Supports at 4
foot intervals and at all elbows are
recommended.
4. The vent connector must be
mechanically fastened to the outlet
collar of the furnace with at least (2)
SPECIAL VENT SYSTEMS (SVS)
IMPORTANT: IT IS RHEEM’S
POSITION NOW THAT NEW
INSTALLATIONS OF ANY HTPV PIPE
USED IN A CATEGORY
III
VENT
APPLICATION, INCLUDING
SELKIRK’S SELVENT™
II HTPV
PRODUCT, SHOULD CEASE
IMMEDIATELY.
POWER VENT SYSTEMS
When vertical venting is not possible,
the only acceptable method for
horizontal venting is with the use of
Tjernlund model GPAK-1TR or Field
Controls models SWG-4R power
venter. Type B vent pipe and fittings
must be used. Common venting is not
permitted
All application and installation
instructions supplied with the power
venter must be followed.
Please address all questions regarding
power venter installation, agency
listings and furnace model compatibility
to:
Tjernlund Products, Inc.
(800) 255-4208 or (612) 426-2993
Field Controls L.L.C.
(800) 742-8368 or (919) 522-0214
sheet metal screws except vent
connectors that are B-1 material.
These shall be assembled in
accordance with the manufacturer’s
instructions. See Figure 9.
NOTE: Refer to the National Fuel Gas
Code, ANSI Z223.1 and/or the Natural
Gas Installation Code, CAN/CGA-
B149.1 & .2.
Single appliance venting of a fan
assisted furnace into a tile-lined
masonry chimney is prohibited. The
chimney must be lined with either Type
B vent or with a listed, single wall,
metal lining system. Reference
National Fuel Gas Code, ANSI Z223.1
and/or the Natural Gas Installation
Code, CAN/CGA-B149.1 & .2. See
Figure 11 for typical B-1 vent chase.
DO NOT CONNECT THIS FURNACE
TO A CHIMNEY USED TO VENT A
SOLID FUEL APPLIANCE (WOOD OR
COAL). VENTING WITH A SOLID
FUEL APPLIANCE CAN LEAD TO
IMPROPER FUNCTIONING OF THE
UNIT, AND DUE TO SOOTING, THE
POSSIBILITY OF FIRE RESULTING
IN PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH.
FIGURE 11
TYPICAL VENTING WITH “B-1” VENT
WARNING
!