31
Installing the Water Heater
1 2 3
4
ON
SW1
CE1
CE2
U1
C1
C2
C7
R6
PC1
12 V
5 V
SIGNAL
SIGNAL
1
GND
R5
R9
R8
C3 R1 R2
R7 D1
CON3
CON5
CON2
CON1
SIGNAL
2
SENSOR I
RA1
City Water Supply
Cold Water Line
Push Button
Contact Signal
Push Button
Contact Signal
Push Button
Contact Signal
To Cold Water Inlet
DHW Return
(To Recirculation Inlet)
Temperature
Sensor*
DHW Supply
(To Hot Water Fixtures)
Check Valve
Check Valve
Expansion Tank
Ball Valve
* When the optional temperature sensor is installed, it must be insulated. The sensor wire may be extended by up to 100 ft
(30 m) using 22AWG wire.
External Recirculation with HotButton and NaviCirc (Optional)
NaviCirc is a circulation device for standard domestic hot water lines
without a recirculation system. It allows domestic hot water lines and
domestic cold water lines to connect to the NaviCirc and preheat hot water
lines by circulating hot and cold water through the NaviCirc. This prevents
hot water loss and heating time loss.
To prevent too much hot water from flowing into the cold water line, the
NaviCirc includes a feature that automatically blocks circulation when
reaching a temperature of approximately 95°F (35°C).
The following diagram shows the basic operation of an NHW700 Series water heater recirculation system with
the NaviCirc.
Note
●
Install the NaviCirc to the faucet farthest from the water heater. If installed in close proximity to
the water heater, faucet pipes far away may not be properly heated.
●
For details, refer to the manual provided with the NaviCirc kit.
