Use and Care Manual

67
NOTE
Check whether the reverse
connection of the hose (H1) and (H3)
if the display number will not change.
In that case, the flow rate of the
flushing solution may be under 1.5
GPM.
6. Turn off the circulation pump.
7. Rinse and clean the flushing solution out of the
Water Heaters in accordance with “For Single
Water Heater [Procedure 2]”.
(See the “Procedure 2.1-2.5”.)
8. Disconnect the blue connector marked “FLUSH”
for flushing.
The Code “C00” goes out on the Remote
Controller.
9. Close the front covers.
10. Open the gas supply valves and water outlet
valves.
11. Check for correct operation of the Water
Heaters.
3. Then the code or is displayed on
the Remote Controller.
• “CCC” is displayed when the Blue Connector of
the Main Water Heater is connected.
• “FCC” is displayed when the Blue Connector of
the Sub Water Heater is connected.
4. Turn on the circulation pump to circulate the
flushing solution through the Water Heaters for
1 hour at a rate of 1.5 GPM or more.
5.
CCC
FCC
For Quick Connect Multi-System
1. Open the front covers.
2. Connect the blue connector marked “FLUSH” for Water Heater needing to be flushed.
(The Water Heater is isolated from Quick Connect Multi-system when the blue connector marked “FLUSH”
for flushing is connected. Do not need to disconnect the Quick Connect Cord.)
Sub Water Heater Main Water Heater
Quick Connect Cord
Do not need to disconnect.
Remote
Controlle
r
Circuit Board
FLUSH FLUSH
Connect
(e.g. The display when the both Water Heaters are
flushed at the same time)
Do not disconnect the blue
connector marked “FLUSH” for
flushing.
C60
C59
C00
CCC FCC
The code “C60” is displayed on
the Remote Controller when the
water heater detects the flow of
the flushing solution.
When 1 minute passes, the code
“C60” will change to “C59” on
the Remote Controller.
When 1 hour passes, the code
“C00” is flashing on the Remote
Controller.
or
C50
C00
CCC
Connect the Blue Connector of the
Main Water Heater
Detects the flow
(10 minutes pass)
FCC
Connect the Blue Connector of the
Sub Water Heater
The remaining time of flushing gives
indication priority to the connector
which is connected later.
Detects the flow
Flashing
(1 hour passes)
C60
Maintenance