Dhw Pump Connection; Dhw Sensor Connection; Alarm Output - Viessmann VITOTRONIC 100 Installation, Start-Up And Service Instructions Manual

Vitotronic 100, KW10B Installation, Start-up and Service

DHW Pump Connection

A DHW pump connection
Note: the control board viewed from the rear/top.

DHW Sensor Connection

A DHW sensor connection
Note: the control board viewed from the rear/top.

Alarm Output

A Alarm output connection
The KW10B is able to control a DHW pump when the OT
or the DHW set point functionality is turned on.
The connection of a 120VAC, with a full load of 3A pump
is connected to the 21 output of the control at the LGN
terminal connections.
Operation of the DHW pump is a function of the DIP and
dial switch settings of the control. Refer to the specific
settings for various options. See page 22.
A 120VAC pump with a full load of 3A is connected at
the LGN terminals of output 21.
The DHW sensor is connected to terminals 1 and 2 of
the #5 connection on the control.
The sensor should be installed into the tank well as
per the manufacturers' instructions to provide proper
temperature sensing.
To enable the DHW funtionality, refer to the start-up
section in this manual.
Follow the instructions for boiler sensor connections on
page 14.
Connect the DHW sensor wires to control X6, terminals 5.1
and 5.2 A as shown.
The KW10B control has a dry contact alarm output.
An alarm output is generated whenever there is a fault
generated from the following:
- outdoor sensor failure (open)
- outdoor sensor failure (short)
- boiler sensor failure (open)
- boiler sensor failure (short)
- DHW sensor failure (open)
- DHW sensor failure (short)
- burner fault
- LON communication failure (after 20 min.)
A
The fault will clear automatically once the actual fault is
corrected.
Contact rating: 24VAC/DC 1FLA
Electrical Connections
15