Dismantling For Service - Rinnai REU-V1620WG Service Manual

18. Dismantling for Service

240 Volt potential exposure. Isolate the appliance and reconfirm with a neon screwdriver or multimeter.
NOTE: As this manual covers a wide range of models, some details of the dismantling
procedure may be slightly different to those depicted in this manual.
Item
1. Removal of the Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
2. Removal of the PCB Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
3. Removal of the Water Flow Sensor, Servo and Bypass Servo . . . . . . . . . . . . .28
4. Removal of the Bypass Servo. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
5. Removal of Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
6. Removal of Sparker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
7. Removal of the Manifold and Burner unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
8. Removal of the Gas Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
9. Removal of Flame rod and spark plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
10. Removal of Outgoing Water Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
11. Removal of Heat Exchanger Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
12. Removal of Bypass Servo. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
13. Removal of Anti Frost Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
14. Removal of Anti Frost heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
15. Removal of the Fan Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
16. Removal of Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
17. Removal of Thermal Fuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Unless otherwise stated, re-assembly is the reverse of
REU-V1620WG / REU-V1620WB / REU-V1620WS / REU-V2024WG - 27 -
dismantling.
Page
Issue 1 - 6/04/09 ©Rinnai