Installation Instructions

whl-590 Rev. 003 Rel. 003 Date 3.22.18
28
Figure 21 - Relief Valve Details
RE-INSPECTION OF RELIEF VALVES: Valves should be inspected
AT LEAST ONCE EVERY THREE YEARS, and replaced if necessary,
by a licensed plumbing contractor or qualied service technician
to ensure that the product has not been aected by corrosive
water conditions and to ensure that the valve and discharge line
have not been altered or tampered with illegally. Certain naturally
occuring conditions may corrode the valve and its components over
time, rendering the valve inoperative. Such conditions can only be
detected if the valve and its components are physically removed
and inspected. Do not attempt to conduct an inspection on your
own. Contact your plumbing contractor for a re-inspection to assure
continued safety.
Do not thread a cap or plug into the relief valve or relief valve line
under any circumstances! Explosion and property damage, serious
injury, or death may result.
FAILURE TO RE-INSPECT THE RELIEF VALVE AS DIRECTED COULD
RESULT IN UNSAFE TEMPERATURE AND/OR PRESSURE BUILD-UP
WHICH CAN RESULT IN PROPERTY DAMAGE, SERIOUS PERSONAL
INJURY, OR DEATH.
The water heater must be full of water and the system fully purged
BEFORE powering the water heater. When lling the water heater,
open a hot water tap to release air in the water heater and piping.
All air has been purged from the system when water runs freely from
the faucets.
Applying power to the water heater when it is not full of water will
damage the heat exchanger, and could result in property damage,
serious personal injury, or death. Such damages ARE NOT covered by
water heater warranty.
H. Filling the Heater
t Ensure any drain valves are completely closed.
t Open the shut-o valve in the cold water supply line.
t Open the hot water faucets to allow air to vent from the heater
and piping.
t
Allow sucient time for the heater to completely ll with water.
Part 5 - Venting
The heater must be vented as detailed in this section. Ensure
exhaust vent and intake piping complies with these instructions
regarding vent system. Inspect nished exhaust vent and intake
piping thoroughly to ensure all joints are well secured, airtight,
and comply with all applicable code requirements, as well as the
instructions provided in this manual. Failure to properly install the
vent system will result in severe personal injury or death.
A. General
This heater is certied as a “Category IV” appliance and requires
a special venting system. The vent system will operate with a
positive pressure in the pipe. Exhaust gases must be piped directly
outdoors using the vent materials and rules outlined in these
instructions. Do not connect vent connectors serving appliances
vented by natural draft into any portion of mechanical draft
systems operating under positive pressure. Follow the venting
instructions carefully. Failure to do so will result in substantial
property damage, severe personal injury, or death.
Exhaust and intake are to be piped separately. This heater cannot
share a common exhaust or intake with multiple appliances.
Failure to follow these instructions will result in substantial
property damage, severe personal injury, or death.
1. Installation should be made in accordance with the regulations of
the Authority Having Jurisdiction, local code authorities, and utility
companies which pertain to this type of water heating equipment.
2. Install the venting system in accordance with these instructions
and with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, CAN/
CGA B149, and / or applicable provisions of local building codes.
3. This water heater must be vented with materials, components,
and systems listed and approved for Category IV appliances.
NOTE: To avoid contamination often contained in indoor air, it is
best to pipe all intake combustion air directly to the outdoors.
NOTE: If exhaust vent pipe system passes through an unheated
space such as an alcove or attic, the space must be heated.
t DO NOT insulate the rst three (3) linear feet of the exhaust vent
run.
t CPVC, Polypropylene, or Stainless
Steel pipe material MUST be used
if the rst three (3) linear feet of
the exhaust vent run is insulated or
passes through an enclosed space
greater than 6” in length, such as a
wall.
t If CPVC is used to meet these
requirements, the balance may be
installed with approved PVC pipe.
t If Polypropylene or Stainless Steel
is used to meet these requirements, the balance of the vent run
must be installed with the same material.
t Failure to comply with this warning could result in property
damage, severe personal injury, or death.
Exhaust
LP-179-JJ
11/30/17
Length
Greater than
Six (6) Inches
Enclosed
Space
Within First Three (3) Linear Feet of
Appliance Exhaust Vent Adapter