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Installation
4.3 Testing the Wiring
4.3.1 Testing the Sensors
4.3.2 Testing the Power Supply
108V to 132V AC
20 of 36
Each terminal block must be unplugged from its header on the control
before power is applied for testing. To remove the terminal block, pull
straight down from the control.
The following tests are to be performed using standard testing practices
and procedures and should only be carried out by properly trained and
experienced persons.
A good quality electrical test meter, capable of reading at least
0 - 300V AC and at least 0 - 2,000,000 Ohms, is essential to properly test
the wiring and sensors.
In order to test the sensors, the actual temperature at each sensor
location must be measured. A good quality digital thermometer with a
surface temperature probe is recommended for ease of use and accuracy.
Where a digital thermometer is not available, a spare sensor can be
strapped alongside the one to be tested and the readings compared. Test
the sensors according to the instructions (see "4.7 Testing the Control" on
page 26
Make sure exposed wires and bare terminals are not in contact with
other wires or grounded surfaces. Turn on the power and measure the
voltage between the Power L and Power N terminals 1 and 2) using an AC
voltmeter. The reading should be between 108V and 132V AC
IM-HC 561174 1120 Basic Heating Control
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