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Figure 6: Optional Piping for Circulation Systems
NOTE:
Applications,
using this piping
arrangement
reduces the
warranty to the following:
3 years on heat exchanger
3 year on parts
Full warranty will be maintained if an
on-demand recirculation system in
incorporated.
Refer to the Limited
Warranty.
For this application:
Pump should be controlled by an Aquastat,
Timer or Combination Aquastat and Timer.
Pump to be sized to maintain circulation
loop temperature.
A minimum
of 3 GPM flow is recommended
for the circulation system.
The pump should be sized to overcome the
T
pressure loss through the water heater,
supply and return plumbing.
Pump to be of bronze or stainless construc-
tion.
Note:
Water heater outlet temperature
cannot be adjusted when
circulation pump is running.
Minimum 3/4" Hot Water
Supply Line
0
o
o
Water
Heater
o
o
(Optional)
2-6
Gallon
Storage
Tank
(To eliminate cold water
sandwich effect caused by
frequent On/Off operation)
Building Fixture Outlets
_
;
Equipment
List
QTY
Water
Heaters
1
Plumbing
Installation
1
Kit (Optional)
(314" Fittings
Include:
2 Unions,
2 Ball Valves,
2 Drain Valves
and
I Pressure
Relief
Valve.)
3/4" Gas Connection
Gas Supply
Minimum 3/4" ColdWater Supply Une
Expansion
Tank
I &
3/4"
Ball Valve
--
3/4"
Union
Check
Valve
Z_
Pressure
Relief
Valve
KEY
_
Pressure
Regulator
Circulating
Pump
Boiler
Drain
Valve
[_
Solenoid
Valve
This is not an engineered
drawing,
It is intended
only as a guide and not
as a replacement
for professionally
engineered
project
drawings.
This
drawing
is not intended
to describe
a complete
system.
It is up to the
contractor/engineer
to determine
the necessary
components
and
configuration
of the particular
system
being installed.
This drawing
does
not imply compliance
with local building
code requirements.
It is the
responsibility
of the contractor/engineer
to ensure
installation
is in
accordance
with all local building
codes.
Confer with local building
officials before
installation.
305 & 505 Indoor Manual
17
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