Rinnai Circ
-
Logic with Grundfos GTK03 Kit
10
Electrical Diagram
Wiring Table
GTK03U
(Pump)
Rinnai Circ
-
Logic
+115VAC
(Circ
-
Logic)
Red (R)
with fuse
Black (Bk)
Neutral
(Circ
-
Logic)
Blue (Bl)
White (W)
Ground
Green (Gn)
*Connect ground to
body of the tankless
water heater
Settings for SW2
(Bank Of White Switches)
Switch 4
Switch 8
Economy Mode
ON
OFF
Comfort Mode
ON
ON
The Grundfos GTK03U Pump
’
s power source is
from the tankless water heater. Disconnect this
supply connection before servicing.
WARNING
RISK OF ELECTRIC
SHOCK
All Components Within
Dashed Line Inside of
Water Heater
Connect
Ground to
Tankless
Housing
7.
Adjust the dip switch in the water heater by moving the 4th switch in the white set of switches (SW2)
to ON.
•
For Economy Mode, set the 8th switch in the white set of switches (SW2) to OFF (default).
•
For Comfort Mode, set the 8th switch in the white set of switches (SW2) to ON.
8.
Connect power to the water heater.
9.
Press the
“
On/Off
”
button on the controller. The pump and water heater will turn on to raise the
recirculation loop temperature.
Figure 3
2 Wire
Connector
Wire to
tankless water
heater
Fu
se
GN
BL
R
W
BK
GTK03U
Pump
Summary of Contents for Circ-Logic
Page 1: ...For SENSEI and non SENSEI Tankless Water Heaters...
Page 15: ......