Patterson-Kelley MACH-05 User Manual
Page 42
MACH® Series
Gas-Fired Boiler
Parts and Technical Support
Page 38
6.1.1a Terminal Block Assignments – Low Voltage Circuit (TB1)
Terminal Number
Label
Description
1 HEAT
REQUEST
2 HEAT
REQUEST
Boiler Enable, Contact Closure.
DO NOT ENERGIZE.
3 INTERLOCK
JUMPER
4 INTERLOCK
JUMPER
External Limit (auto reset), Contact Closure.
DO NOT ENERGIZE.
5
DHW TEMP. SENSOR
6
OUTDOOR TEMP SENSOR
Thermistor - factory option.
7
CIRC. PMP PWM SIGNAL
Pulse Width Modulation.
8
COMMON
Common to be used with 5, 6, 7, and 10 when used.
9
COMMON
Common to be used with 5, 6, 7, and 10 when used.
10
O-10 V ANAL. INPUT CONTROL Remote control of firing rate or setpoint.
11
+10 VOLT
Regulated 10V output.
12
COM 1
RS-485 port A.
13
COM 2
RS-485 port B.
14
OUTSIDE TEMP W/ FILTER
Thermistor - factory option.
15
OUTSIDE TEMP W/ FILTER
Thermistor - factory option.
16 SPARE
17 SPARE