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11. Plumbing Applications
Pump Control Signal
(See p. 23)
(See p. 23)
(See notes for Sizing)
Pump Control signal
(See p. 23)
Recirculation System
Pump
Fixtures
Cold Water Supply
Check
Valve
Hot Water Return
Check Valve
Pressure
Relief
Valve
Hot Water
Shutoff Valve
Drain
R
B
W
Use Honeywell Aquastat
(Model L6006A or L6006C)
Pump
AC120
Aquastat Wiring
105
Neutral
Ground
Live
5
Heating System
Cold Water Supply
Check
Valve
Hot Water Return
Pressure
Relief Valve
Hot Water
Drain
Air Scoop
(Optional)
Temp. &
Press. Gauge
(Optional)
Hydronic Heat
Exchanger or
Radiant Heat
Piping
Pressure
Reducing
Valve
(Optional)
Shutoff
Valve
Backflow
Preventer
(Optional)
Boiler Drain Valve
Heating
Controls
Mixing Valve
Cold Water Supply
Tempered Potable Hot Water
Hot Water for Heating
If the system requires water
for space heating at a higher
temperature than for other
uses, means such as a mixing
valve shall be provided to
temper the water for the other
uses to help prevent scalding.
For Space Heating Purposes:
Check Valve
Aquastat
(Use Aquastat if Unit Isn't
Controlling Pump)
Aquastat
(Use Aquastat if
Unit Isn't Controlling
Pump)
Pump
Expansion Tank
(Install According
to Local Codes)
Optional 30 - 38L
(8-10 Gal.)
Storage Tank
(To Alleviate Cold
Water Sandwich)
(See p. 23)
(Install According
to Local Codes)
(Relay for
Pump
> 85 W)
(See notes for Sizing)
Expansion
Tank
For Baseboard
Applications:
Please contact
Noritz for
compatibility.
(Relay for
Pump
> 85 W)
Shutoff Valve
NORITZ
Gas Water
Heater
NORITZ
Gas Water
Heater
Gas
Water
Heater
* Size the pump to provide at least 6L/min. (1.58 GPM) through the system at 30kPa (10')
of Head plus piping losses. Check the maintenance monitors on the unit to make sure the
pump is providing that much flow.
** Adjust the flow using a gate valve and verify the flow rate with the maintenance monitors.
* Size the pump to provide at least 6L/min. (1.58 GPM) through the system at 30kPa (10') of
Head plus piping losses. Check the maintenance monitors on the unit to make sure the
pump is providing that much flow.
** Adjust the flow using a gate valve and verify the flow rate with the maintenance monitors.
07.1.12, 3:13 PMPage 19