TM049 27L Continuous Flow Service Instructions
REV AL
– Issued April 2019
This document is stored and maintained electronically by Rheem Technical Support.
All printed copies are deemed “uncontrolled”.
6
In-Service Testing
It is a requirement of AS/NZS 3760 that an in-service test be performed when re-instating
an appliance to service.
Following any repairs to the water heater ensure that both an earth continuity test and
insulation test are carried out prior to completing service call as follows:
Wear Personal Protective Equipment when conducting these procedures to
reduce the risk of electric shock. Refer to Rheem safety procedure on electrical
testing.
Procedure 1: C
heck “Continuity” of the earth conductor.
1.
Isolate power to the water heater by switching off at power point and unplugging
appliance 3 pin plug from power point.
2. Set multimeter to x1 resistance scale.
3. Measure between the Earth pin on the 3 pin plug and the heater jacket, a reading of
≤
0.5Ω should be obtained. If a reading greater than 0.5Ω is returned check the earth
connection at the water heater, if ok replace the cord.
Procedure 2: Insulation resistance of the water heater Active Circuit (reading not to
be below 1M
Ω).
4. Connect megger leads to the Active and Earth pins of the 3 pin plug.
5. Operate megger. A reading above 1M
Ω should be obtained.
6. If a reading below 1M
Ω is indicated, all component parts will need to be individually tested
to locate the fault.
Procedure 3: Insulation resistance of the water heater Neutral Circuit. (Reading not to
be below 1M
Ω).
7. Connect megger leads to the Neutral and Earth pins of the 3 pin plug.
8. Operate megger. A reading above 1M
Ω should be obtained.
9. If a reading below 1M
Ω is indicated, all component parts will need to be individually tested
to locate the fault.
10. Plug 3 pin plug back into power point and switch on power point.
Note:
If continuing
with any diagnostic procedures do not perform this step.
