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15 Plumbing Applications
Check Valve
Check Valve required
if it is not included
with the pump.
Globe Valve
Glove Valve is necessary
for flow rate adjustment
and maintenance.
Air Vent
Air Out
Expansion Tank
(Install according
to local code)
Fixtures
Hot Water
Return Line
Cold Water Supply
Pump
Size the pump to provide a
maximum of 2 GPM (7.5 L/min)
through the system at 10 ft (3 m)
of head plus piping losses.
Adjust the flow using a globe
valve and verify the flow rate
with the maintenance monitors.
(Refer to the Techinical Sheet.)
Pump Control Signal
Pump Control Signal is the preferred
method to control the recirculation
pump.
For pumps greater than 100 W, a relay
connection must be used. If the Pump
Control Signal is not used, an Aquastat
may be used to control the pump.
Aquastat
Set the Aquastat to 10˚F
(-12˚C) below the set
output temperature.
An aquastat is the
minimum pump control
requirement
in order to maintain the
full recirculation
warranty.
* Isolation Kit
Noritz recommends the use of an Isolation Kit with the
installation. These kits include an integrated shut-off and
service valve with unions and a pressure relief valve.
Gas Supply
* Isolation
Kit
Relay for Pump
(If greater than
100 W)
Recirculation System
• With a Recirculation System, the water from the Water Heater to the fixtures can be warmed up in advance.
You can get hot water to your fixtures more quickly with less waste of water.
• See the Owner’s Guide for more information about how to set up for recirculation opelation.
• Scale build-up is more likely to occur in a Recirculation System, therefore it is critically important to have
proper water treatment and maintenance.
B
W
R
Pump
Neutral
Ground
Live
AC
S
Honeywell Aquastat
Plumbing Applications
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