69
2. Open the Auto Feeder Supply Line.
3. Plug in the power cord, and then press
ON/OFF
button
on the Operation Display. The unit will
be activated and then start filling to the unit
with water automatically. The Operation Display
will be displaying the following rotation patterns
during the auto feeder process.
4. (In case of using external Circulation Pump and
Zone Heating System)
Turn the external Circulation Pump (Circulator)
ON and open all Zone Valves to fill the
whole system inculding all zones (all heating
appliances) with water.
5. Open the “System Purge Ball Valve” for purging
all air from the whole system. Make sure that
supplied water is flushing out through this Valve
without air.
Flush and purge all air completely from the
whole system.
6. The unit will repeat auto feeder process for
filling water automatically. Once heating water
pressure reaches to a certain pressure (default:
12 psi), the unit will stop auto feeder process
(water filling process).
7. Close the Air Vent Cap on the internal pump
inside of the unit.
8. Turn the external Circulation Pump (Circulator)
OFF, and then close the “System Purge Ball
Valve” and all Zone Valves.
9. Make sure that no water leakage from all of
pipes, connections and all zones (all heating
appliances).
10. Make sure that heating system pressure is 12 to
30* psi at the unit outlet. Noritz recommended
system pressure is 12 psi.
* Noritz recommends to install a pressure gauge
on the heating outlet line.
NOTE
If error code 57 appears on the
Operation Display after finishing auto
feeder process, the Combi Boiler and
heating system are not filled with
water completely.
In this case, fill the unit with water
and purge all air from the Combi
Boiler and heating system again in
accordance to steps (1) - (10).
11. Unplug the power cord, and then move to step
for Trial Operation.
NOTE
• White smoke may be noticed
from the exhaust vent during cold
weather. This is not a malfunction
of the Combi Boiler.
• If the Combi Boiler does not
operate normally, refer to
“Troubleshooting” in the Owner’s
Guide.
Trial Operation
Before trial operation, make sure that all wiring
connections and Dip Switches are set correctly
according with Wiring Diagram and Dip Switch
Settings.
1. Open the Gas Supply Valve.
Plug in the power cord, and then press
ON/OFF
button
on the Operation Display.
(The unit will start to fill with water again, but it
will be stopped shortly.)
2. Press
ON/OFF button
ON, and then set the
Heating Temperature and DHW temperature.
(Refer to the Owner’s Guide for detail
information of setting temperature.)
1) For Heating Temperature;
Press
TEMP button
once, and then set the
desired temperature by using the /
buttons
.
2) For DHW Temperature;
Press
TEMP button
twice, and then set the
desired temperature by using the /
buttons
.
3. DHW and Heating Operations
For Heating Side Operation;
1) Turn on the heat demand (T-T signal) to
activate and fire up the unit.
2) Make sure that the unit and heating appliance
operation is normal.
For DHW Side Operation;
1) Open the DHW outlet valve and a fixture (i.e.
shower or bathtub).
2) Make sure that Hot Water can be delivered
and the unit’s operation is normal.
• Error Code 20: High Limit Switch triggered.
If the error code 20 is displayed on the
Operation Display, it may be caused by air
remaining in the Combi Boiler, heating system
or internal pump. In this case, purge air from
the heating system and Combi Boiler according
with pages 68 - 69.
• Error Code 64: Air Lock of Internal Pump.
If the error code 64 is displayed on the
Operation Display, it may be caused by air lock
of internal pump.
In this case, purge air from the internal pump
and Combi Boiler according with pages 68
- 69. This error code 64 will be displayed on
the Operation Display after reconnecting the
electrical power. After reconnecting power,
CAUTION
Water Filling and Trial Operation