67
INSTALLATION INSTRUCTIONS
Piping for Space Heaters
Local codes or plumbing authority requirements may vary
from the instructions or diagrams provided in this manual
and take precedence over these instructions.
Combination Potable and Space
Heating Application
DANGERS:
When this system requires water for space heating at
elevated temperatures (above 125°F [52°C]), a mixing or
tempering valve MUST BE installed in the hot water supply
line to the house in order to reduce the scald hazard
potential.
Any piping or components used in the installation of
this water heater in a combination potable and space
heating application must be suitable for use with
drinking water.
If this water heater is installed in an application intended
to supply domestic hot water needs and hot water
for space heating purposes, DO NOT connect the
heater to an existing heating unit or components of a
heating system that have previously been used with a
nondrinking water system.
Toxic chemicals such as those used for boiler treatment
may be present and will contaminate the drinking water
supply causing possible health risks. Never introduce
toxic chemicals, such as glycol and those used for
boiler treatment, into this system.
This water heater is NOT approved as the dedicated
space heating unit.
This water heater must be used for combination
applications with air handler only and not for indoor
heating applications.
Typical Combination Installation
Space Heater
Cold Water
Supply
Potable Water
Expansion Tank
(2 gallons)
Tankless
Water Heater
Air Handler
Union
Cold Water Supply
Shut-O Valve
Check
Valve
Gas Supply
Line
Drain Valve
Tempering
Valve
Tempered
Water
Shut-O
Valve
Air
Separator
Relief
Valve
(Pump included)
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