Terminal Block Assignments - Low Voltage Circuit (Tb1) - Patterson-Kelley MACH Series Installation & Owner's Manual

MACH® Series Gas-Fired Boiler
6.1.1a Terminal Block Assignments – Low Voltage Circuit (TB1)
Terminal Number
1 HEAT REQUEST
2 HEAT REQUEST
3 INTERLOCK JUMPER
4 INTERLOCK JUMPER
5 DHW TEMP. SENSOR
6 OUTDOOR TEMP SENSOR
7 CIRC. PMP PWM SIGNAL
8 COMMON
9 COMMON
10 O-10 V ANAL. INPUT CONTROL Remote control of firing rate or setpoint.
11 +10 VOLT
12 COM 1
13 COM 2
14 OUTSIDE TEMP W/ FILTER
15 OUTSIDE TEMP W/ FILTER
16 SPARE
17 SPARE
Label
Boiler Enable, Contact Closure.
DO NOT ENERGIZE.
External Limit (auto reset), Contact Closure.
DO NOT ENERGIZE.
Thermistor - factory option.
Pulse Width Modulation.
Common to be used with 5, 6, 7, and 10 when used.
Common to be used with 5, 6, 7, and 10 when used.
Regulated 10V output.
RS-485 port A.
RS-485 port B.
Thermistor - factory option.
Thermistor - factory option.
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