Technical information

1
Control Overview—Pump Outputs
Pump Outputs—Heating Circuit Pumps [20][M2] and [20][M3]: 120VAC Output
Applicable for Vitotronic 300, GW2 and Vitocontrol-S, MW1
1 White [20][M2] and [20][M3]
plugs are plugged into control
from previous control
installation steps.
2 Pre-wired interconnecting
harness for [20][M2] and [20]
[M3] plug between DIN rail
terminals.
3 Terminals on DIN rail inside
control junction box.
4 Output voltage 120VAC at
terminal 1 and 2 on DIN rail for
both pump outputs.
Neutral and Ground terminals
provided if necessary.
5 Connected fractional
horsepower pump or circulator.
Refer to pump installation
manual for proper wiring
connections inside of pump.
120VAC Pump Output
Rated current: max 2FLA
Recommended connection wire
size: AWG 14
Connect the 3-wire cable from the
pump to the corresponding
terminals inside of control harness
junction box.
2
3
4
5
Heating
Circuit 3
Pump
Heating
Circuit 2
Pump
Section 3.5.1
Section 3
IMPORTANT
Ensure that all field wiring conforms
to local codes and regulations.
Connection Overview
5346540 v1.0 09/2006 Technical information subject to change without notice
44