Terminals 10 - 16 – tekmar 279 Steam Control User Manual
Page 12
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2010 D
279
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05/10
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Boiler
The Boiler terminals (7 and 8) are isolated outputs in the
control. There is no power available on these terminals
from the control. These terminals are to be used as a
switch to either make or break the thermostat input on a
steam boiler or the power to a steam valve. Since this is
an isolated contact, it may switch a voltage between 24 V
(ac) and 230 V (ac).
Sensor and Unpowered Input Connections
Terminals 10 - 16
Do not apply power to these terminals as this will
damage the control.
Outdoor Sensor
Connect the two wires from the Outdoor Sensor 070 to the
Com Sen and Out Sen terminals (14 and 16). The outdoor
sensor is used by the control to measure the outdoor air
temperature.
Condensate Sensor
Connect the two wires from the Condensate Sensor 071
to the Com Sen and Cdn Sen terminals (14 and 15). The
condensate sensor is used by the control to measure the
condensate temperature.
Indoor Sensor S1
Connect the two wires from the Indoor Sensor 076, 077,
or 084 to the Com Sen and Indr S1 terminals (10 and 13).
The indoor sensor is used by the control to measure the
room air temperature.
Indoor Sensor S2
Connect the two wires from the Indoor Sensor 076, 077,
or 084 to the Com Sen and Indr S2 terminals (10 and 12).
The indoor sensor is used by the control to measure the
room air temperature.
DHW Tankless Coil Sensor
Connect the two wires from the DHW Tankless Coil Sensor
082 to the Com Sen and DHW Sen terminals (9 and 11).
The DHW tankless coil sensor is used by the control to
measure the tankless coil temperature.
14
15
Com Cdn
Sen Sen
Steam
Control 279
Steam
Control 279
10
11
12
ComDHW Indr
Sen Sen S2
Steam
Control 279
10
11
12
13
ComDHW Indr Indr
Sen Sen S2 S1
Steam
Control 279
9
10
11
Com Com DHW
Sen Sen Sen
14
15
16
Com Cdn Out
Sen Sen Sen
Steam
Control 279
Outdoor
Sensor 070
Condensate
Sensor 071
Indoor Sensor
076, 077 or 084
Indoor Sensor
076, 077 or 084
DHW
Tankless Coil
Sensor 082
T-T contacts
on boiler
OR
(24 to
230 V (ac))
Steam
Control 279
7
8
Boiler
L or R
N or C
Valve