Technical information

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1
Control Overview—Pump Outputs
Pump Outputs—Heating Circuit Pumps [20][M2] and [20][M3]: Dry Contact Control Signal
Applicable for Vitotronic 300, GW2 and Vitocontrol-S, MW1
1 White [20][M2] and [20][M3]
plugs plugged into control from
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 of
control junction box.
4 Output voltage 120VAC at
terminal 1 and 2 for both pump
outputs.
Neutral and Ground terminals
provided if necessary.
5 Connected devices.
Field supplied 120VAC relay.
Relay can either be mounted in
control junction box or
remotely.
120VAC Output
Rated Current: max 2FLA
Recommended connection wire
size: AWG 14.
2
3
4
Heating
Circuit 3
Output
Signal
Heating
Circuit 2
Output
Signal
Section 3.5.1
Section 3
R R
5
IMPORTANT
Contact rating of field supplied
contactor or relay will determine the
loads that can be switched. Consult
contact rating information on the
side of relay/contactor housing or
manufacturer directly
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
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