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TEST THE POWER SUPPLY
Make sure exposed wires are not in contact with other wires or grounded
surfaces. Turn on the power and measure the voltage between the C and R
pins using an AC voltmeter, the reading should be between 22 and 26 V (ac).
TEST THE POWERED INPUTS
22 to 26 V (ac)
Heat Demand
If a heat demand is used, measure the voltage between the CD (common
demand) and the Ht D (heat demand) pins. When the heat demand device
calls for heat, between 20 and 130 V (ac) should be measured at the pins.
When the heat demand device is off, less than 5 V (ac) should be measured.
20 to 130 V (ac)
DHW Demand
If a DHW demand is used, measure the voltage between the CD (common demand) and the DHW D (DHW demand) pins.
When the DHW demand device calls for heat, between 20 and 130 V (ac) should be measured at the pins. When the
setpoint demand device is off, less than 5 V (ac) should be measured.
TEST THE EXTERNAL INPUT
If an external input signal is used, measure the voltage between the Com/- and +V(in) pins. When the external control calls
for heat, between 0 and 10 V (dc) should be measured.
CONNECTING THE CONTROL
Make sure all power to the devices and wiring harness is off.
Reconnect the wiring harness to the connector on the control by aligning the tab on the wiring harness to the tab on the
connector on the control and then pushing the wiring harness into the connector on the control. The tab on the wiring har-
ness should snap over the tab on the connector of the control.
Apply power to the control. The operation of the control on power up is described in the Sequence of Operation section
of the brochure.
Model SF-10 Control Instructions Manual
15
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