Application Brochure

5 of 16 © 2013 654_A - 06/13
Single Zone with Boiler and Tandem Snow / Ice Sensors A654-2 Electrical
LNG
Outdoor
Sensor
070
Supply
Sensor
082
115 V (ac)
Relay 003
System
Pump
Relay 003
2
1
8
7
3
4
5
6
2
1
8
7
3
4
5
6
Modulating Boiler
T
T
–+
Transformer 009
L
N
C
R
Snow / Ice Sensor
090 or 094
Snow / Ice Sensor
090 or 094
Slab
Brn
+
Mod tN4Aux Ht R C
Bret
Out/
Com–
BlkYel Blu Red Sup
No Power
Slab
Brn
+
Mod tN4Aux Ht R C
Bret
Out/
Com–
BlkYel Blu Red Sup
No Power