Installation & Operation Manual
2
Venting
(continued)
17
Condensing vent options: CAT II & IV
(CAT II vent options A, B, & C requires an adapter kit - see page 14)
C
CAT II
requires an
adapter kit.
See page 14.
CAT II/IV
Vent/Air Vertical installation with sidewall combustion air inlet - see page
15.
The Vent/Air Vertical with a Sidewall Combustion Air Vent system terminates the flue at the rooftop and air inlet
at the sidewall. The flue outlet and combustion air intake terminate in different pressure zones.
The optional Vent/Air vent system requires the installation of specific venting materials that are purchased locally.
The termination point for the flue products must follow the vertical vent termination clearance requirements on
pages 24 and 25. These units can be identified by the Category IV as noted on the unit’s rating plate.
Follow all requirements in the
General Venting
and
Category IV General Venting
sections for proper installation and
for venting flue products to the outdoors with a vertical termination (see pages 19 and 20).
The Vent/Air Vertical system requires the installation of an additional pipe to supply combustion air from outdoors
directly to the appliance. Follow all requirements under the
Combustion Air Inlet
section on pages 22 and 23.
Sidewall combustion air inlet:
The air inlet cap for the sidewall air inlet must be purchased from the appliance
manufacturer.
The part numbers for the required sidewall air inlet cap kit are listed by model. Each kit includes the special
combustion air inlet cap for installation on an exterior sidewall. The sidewall air inlet cap supplied in the kit is sized
to provide combustion air for a single appliance only.
TABLE - 2E
AIR INLET CAP TERMINATIONS
MODEL
CAT II
CAT IV
CAT IV
KIT
NUMBER
MODEL
CAT II
CAT IV
CAT
IV KIT
NUMBER
AIR
SIZE
VENT
SIZE
AIR
SIZE
VENT
SIZE
AIR
SIZE
VENT
SIZE
AIR
SIZE
VENT
SIZE
VWH0500
5"
7"
5"
4"
9910117000
VWH1500
6"
8"
6"
6"
9910117002
VWH0750
5"
9"
5"
5"
9910117000
VWH2000
8"
10"
8"
8"
9910117004
VWH1000
6"
10"
6"
6"
9910117002
--
--
--
--
--
--
Air Inlet Cap
D
CAT IV
Sidewall termination with combustion air from equipment room - see page
15.
The connection from the appliance flue outlet to the sidewall vent cap MUST be made with listed Category IV
vent materials and accessories. The installer must supply suitable vent pipe material. The sidewall vent cap must
be purchased from the appliance manufacturer.
The sidewall vent cap kit includes the wall penetration assembly and the discharge screen assembly. All required
Category IV vent pipe and fittings must be purchased locally.
The termination point for the flue products must follow the sidewall vent termination clearance requirements on
pages 25 and 26. These units can be identified by the Category IV as noted on the unit’s rating plate.
Follow all requirements in the
General Venting
and
Category IV General Venting
sections for proper installation
and for venting flue products to the outdoors with a sidewall termination (see pages 19 and 20).
TABLE - 2F
FLUE VENT TERMINATION SIZES
MODEL
CAT IV
VENT SIZE
CAT IV
KIT
MODEL
CAT IV
VENT SIZE
CAT IV
KIT
VWH0500
4"
9910118000
VWH1500
6"
9910118002
VWH0750
5"
9910118001
VWH2000
8"
9910118004
VWH1000
6"
9910118002
--
--
--
Vent Cap
