Technical data

26
CONNECTIONS – ELECTRICAL
The power supply to the water heater must not be switched on until the
water heater is filled with water and a satisfactory megger reading is
obtained.
MEGGER READING
When a megger test is conducted on this water heater, then the following
should be noted.
Warning: This water heater contains electronic equipment and 500 V
insulation tests must only be conducted between active and earth and between
neutral and earth. An active to neutral test WILL damage the electronics.
An insulation test result of between 100 KΩ and 660 KΩ for this water
heater is normal.
Typically the insulation resistance between live and earthed parts of an
electrical installation should not be less than 1 MΩ. However
AS/NZS 3000:2000 clause 6.3.3.3.2 „Results‟ states:
“The value of 1 MΩ may be reduced to:
0.01 MΩ for sheathed heating elements or appliances; or
a value permitted in the Standard applicable to electrical equipment.”
This model water heater is categorised as a „stationary class 1 motor operated
appliance‟ and has been tested to AS/NZS 3350.1:2002 clause 16 „Leakage
current and electric strength‟ and has passed the requirements of this
Standard. Therefore, this model water heater complies with the condition stated
in AS/NZS 3000:2000 clause 6.3.3.3.2 (b).
ELECTRICAL CONNECTION
All electrical work and permanent wiring must be carried out by a qualified
person and in accordance with the Wiring Rules AS/NZS 3000 and all local
codes and regulatory authority requirements.
This water heater is recommended for connection to a minimum 16 hour per
day power supply for a 325 litre storage tank and a 24 hour per day power
supply for a 410 litre storage tank.