Operating Guide

28
PLEASE NOTE: 45H IS FOR OUTDOOR PERMANENT INSTALLATIONS ONLY AND 45HI IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL
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Venting
The installation of venting must
comply with national codes, local
codes, and the vent manufacturer’s
instructions. Owner must refer to
vent manufacturer’s instructions
and specications. Z-Flex
information can be found at www.
novaex.com, please refer to page
19 for additional links.
The water heater must be vented
to the outdoors as described in
these instructions. DO NOT connect
this water heater to an existing
Vent or Chimney, it must be vented
separately from all other appliances.
All vent components (adapters,
pipe, elbows, terminals, etc.) should
be UL 1738 Certied Stainless Steel
Venting Material (e.g. AL29-4C).
The specied vent termination must
be used. The termination should be
a 90° elbow type with screen.
(Refer to page 19).
Use a vent pipe with an
antidisconnection structure.
The use of a High Temperature
Silicone (500’ F) may be required
to seal vent connections. To
prevent accidental gas exhaust
leakage, apply a 1/4” wide bead
approximately 1/4” from the end
and another bead against the joint
side of the stop bead.
Follow vent manufacturer’s
installation instructions.
The unit can be vented either
horizontally or vertically.
Vent pipe runs must be adequately
supported along both horizontal
and vertical runs.
The maximum recommended
unsupported span should be no
more than ve (5) feet. Support
isolation hanging bands should
be used. DO NOT use wire. (See
diagram below).
DANGER: Failure
to install the vent
adapter and properly
vent the water heater
to the outdoors as
outlined in the
Venting section of
this manual will result
in unsafe operation
of the water heater
causing death, serious
injury, explosion, or
re. To avoid the risk
of re, explosion,or
asphyxiation from
carbon monoxide,
NEVER operate the
water heater unless it
is properly vented
and has adequate
air supply for proper
operation as outlined
in the Venting section
of this manual.
WARNING: Use
UL approved Category
III Stainless Steel vent
material only. No
other vent material is
permitted.
Owner must refer to
vent manufacturer’s
instructions and
specications. Z-Flex
information can
be found at www.
novaex.com, see
page 19 for additional
links.
WARNING: Refer
to pages 17-18 for
clearances to
combustible material.
Installing the 45-HI water heater
Venting Through Closed Spaces
If the vent piping passes through a closed space, wrap the vent pipe with inammable insulation material
that is at least 3/4” thick. DO NOT let the insulation material make contact with ammable materials. A
minimum clearance of 6” between the vent pipe and ceiling should be maintained. Follow local codes.
For maintenance and inspection purposes, the
following holes are required to be made:
• Two (2) inspection openings that allow access to venting. One
( 1) of these openings should be close to where the vent pipe
enters the ceiling. The other opening should be near the vent
termination.
• A ventilation hole with a 16 sq. in. opening should be made at
least every 10 feet.
NOTICE : Vent pipes must be completely insulated with
inammable material when installed in alcoves, closets, and garages and must not touch any ammable
material.
45-HI