Data Transfer Between Pcb's; Water Flow Chart - Rinnai One 11i Operation And Installation Manual

3.3 DATA TRANSFER BETWEEN PCB'S

If a new PCB needs replacing, you can transfer data (gas type, model type, gas pressure and error history) from the
existing PCB to the new one by doing the following:
1. Check the current settings and note them on a piece of paper.
2. Adjust the dip switch settings on the new PCB according to the old
one.
3. Unplug the power supply and remove the existing PCB.
4. Fit the new PCB and conect all the wiring harnesses
5. Ensure it is earthed correctly.
6. Connect the new board to the old board using the data transfer cable
provided with the new PCB.
7. Reconnect the power supply and push PB1 button of the new PCB.
8. The lED goes green: it means that the data transfer was successful.
This will stay green for five minutes or until the PB1 button is pressed
again.
9. If the data transfer is unsuccessful the lED will start flashing.
10. Turn off the power supply and remove the data transfer cable.
If the data transfer was not successful set the PCB manually according to the settings copied at the beginning of
this procedure. If maually set, the max and min gas operating pressures must be checked.

3.4 WATER FLOW CHART

Water pressure-flow diagram:
25
20
15
10
5
0
0
38
REU-A1111W
REU-A1111FFU
REU-A1111W
REU-A1111FFU
100 200
REU-A1420W / REU-A1720W
REU-A1420FFU / REU-A1720FFU
Tin=25°C
Tin=5°C
300
Water pressure (kPa)
Data transfer cable
Old PCB
New PCB
400 500