KDB-GOM
Series
- 47 -
4. Trial operation
4.1 Trial operation quick-fill
STEP 1
Fill water by means of auto water filling system.
STEP 2
DIP switch setting #1 to on.
STEP 3
Run the pump for 2hours.
STEP 4
After trial operation, manipulate DIP switches in the stand-by condition to the stop the trial operation and re-
set the switches.
STEP 5
The low water level will be automatically deactivated at 1-minute intervals.
STEP 6
If the flow switch is “ON”, stop the pump and check for any errors.
STEP 7
If DIP switches are set for trial operation, the power lamp will flicker : 1-second “ON” and 1-second “OFF”.
■
After the installation, connect the unit to an AC 220V, 50/60Hz outlet with the intermediate valve in the water
supply line open and turn the water heater “ON”. The auto water fill will start.
■
When the temperature sensor terminal is disconnected, the fans and pumps are continuously run to purge air in
the piping.
4.2 Procedure of trial operation
STEP 1
Open the water valve & fill the system.
STEP 2
Fill the units with water by means of the automatic water filling system and wait until the pressure in the
heating pipe reaches the maximum pressure(max. pressure through water filling valve). (Air in the heating
water pipe will cause quick corrosion in the unit. Take the time to completely remove air before proceeding to
the next step.
STEP 3
Wait until the water fill is completed.
STEP 4
Check the unit and turn the unit to “ON” at the room thermostat.
STEP 5
If the CHECK lamp is illuminated, note the
error code
and follow the steps required according to the
troubleshooting guide. After the corrections or adjustments have been made, restart the unit. Disconnecting
and reconnecting the power may be required to restart the unit.
STEP 6
In case of water pipe leaks, turn off power to unit. Shut off all isolation valves. Inspect O-ring connections and
replace if necessary. Check to be sure all fastening clips are securely in place before opening the isolation
valves.
■
Turn the boiler to “POWER” at the room thermostat.
■
If the CHECK lamp is illuminated, note the
error code
and follow the troubleshooting guide. After the require or
adjustments have been made, restart the unit. Disconnecting and reconnecting the power may be required to
restart the boiler(at power button “POWER”).
■
In case of leaks water pipes, turn off power to unit. Shut off all isolation valves. Inspect O-ring connections and
replace if necessary. Check all fastening clips are securely in place before opening the isolation valves.
