Testingthe Wiring - Viega Basic Heating Control Installation Manual

InstALLAtIon - CHAPtER 5
sensor and Unpowered Input Connections
Do not apply power to these terminals as this will damage the control.
oUtDooR sEnsoR
Connect the two wires from the Outdoor Sensor to the Com and Out
terminals (11 and 12). The Outdoor Sensor is used by the Basic Heating
Control to measure the outdoor air temperature.
sUPPLy sEnsoR
Connect the two wires from the Supply Sensor to the Com and Mix terminals
(10 and 11). The Supply Sensor is used by the Basic Heating Control to
measure the supply water temperature downstream of the mixing or
injection valve.
InDooR sEnsoR
If an optional indoor sensor is used, connect the two wires from the sensor
to the Com and Indr terminals (11 and 13).
5.3 testing the Wiring
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 - 300 VAC
and at least 0 - 2,000,000 Ohms, is essential to properly test the wiring
and sensors.
test the 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 on page 15.
test the Power supply
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 108 and 132 VAC.
VIEGA 1-800-976-9819 11 PI-16015-03/09