Use & Care Manual

25
Read these instructions thoroughly and make sure
you understand all steps and procedures before
proceeding with the installation.
Determine the locations for the vent and com-
bustion air-inlet terminals then make two (2)
holes through the roof and interior ceiling(s) to
accommodate the vent and combustion air-inlet
pipes.
●
Maintain a minimum horzontal distance of
12 in. (31 cm) between the vent and com-
bustion air-inlet terminals.
Assemble the vent pipe assembly.
Install the vent system and attach it to the vent
connector fitting on the water heater’s blower
assembly.
●
Horizontal lengths of the vent system
must slope towards the water heater
a minimum of 1/8 in. per foot (10 mm
per m).
Install the combustion air-inlet system and
attach it to the combustion air-inlet connector
fitting on the water heater’s combustion air-inlet
tube assembly.
●
Support vertical and horizontal lengths of
the vent and combustion air-inlet systems as
previously mentioned.
Determine the vent and combustion air-inlet ter-
minal heights and cut the pipe accordingly.
●
Insert lengths of vent and combustion
air-inlet pipes through the ceiling wall as
shown.
●
Install adequate flashing where the vent and
combustion air-inlet pipes pass through the
roof.
●
Connect a short piece of pipe approximately
3 in. (7.6 cm) to the terminals and elbows.
Place the supplied 1/2 in. (1.3 cm) mesh metal
screens inside each terminal fitting then connect
a short piece of pipe approximately 3 in.
(7.6 cm) between the terminals and elbows.
NOTICE: For cold climates the screens may
be removed.
For 75 Gallon Power Direct Vent Models
ONLY:
These water heater models are supplied with two
(2) vent and combustion air-inlet termination
restrictors. These restrictors help the water heater
achieve peak efficiency when the water heater is
installed using 3 in. (7.6 cm) diameter pipe at the
minimum equivalent vent and combustion air-inlet
lengths specified in Table 2.
IMPORTANT: Do not install the termination
restrictors in equivalent vent and/or combustion
air-inlet lengths longer than 8 ft. (2 m) or on any
other Power Direct Vent model.
NOTICE: Termination Restrictors supplied for
use with 75 Gallon models ONLY.
NOTICE: Vent pipe, fittings, solvent cement, primers and procedures must
conform to ULC-S636.
Vertical Vent and Combustion Air-Inlet Installation
The location of the vent and combustion air-inlet terminals depends on the following mini-
mum clearances and considerations:
Minimum 18 in. (46 cm) exposed pipe above roof.
Maximum 2 ft. (61 cm) exposed pipe above roof level without additional support for vent.
Four (4) ft. (1.22 m) from any gable, dormer or other roof structure with building interior
access (i.e., vent, window, etc.).
Within 6 ft. (1.8 m) of mechanical air supply inlet.
Maintain a minimum horizontal distance of 12 in. (30.5 cm) between the vent and
combustion air-inlet terminal centerlines.