Buderus Logamax plus Installation Instructions Manual page 32

7 Electrical connections
EV Terminal - External switching contact
An external switch contact can be used, i.e. to safeguard a
floor heating system so that the heating water temperature
will not become too high etc.
When the external switch contact is opened, the boiler will
be switched off for heating operation and for domestic hot
water operation.
The pump continues to run for the run-over time set on the
boiler.
Remove the cable from the EV terminal (fig. 31).
Connect the external switch contact to the red EV
terminal (fig. 31).
DWV Terminal - Three way valve
Do not use this connection.
7.1.3 120 VAC connections
NOTICE
Use the 120 VAC connections for specific
hydraulic configurations and a corresponding
controller.
PK Terminal - External pump
Connect the external heating or system pump (for situa-
tions where the pump of the Buderus pump group is not
used) to the green PK terminal (fig. 32). The maximum
allowed connected load of the pump = 250 Watts.
PS Terminal - DHW pump
Connect the DHW pump to the grey PS terminal (fig. 32).
The maximum allowed connected load of the pump
= 250 Watts.
PZ Terminal - DHW circulation pump
Connect the DHW circulation pump to the lilac PZ
terminal (fig. 32). The maximum allowed connected load
of the pump = 250 Watts.
Netz connector
Connecting incoming power
The boiler must be electrically grounded in
accordance with local codes, or in absence of
local codes, with the National Electrical Code,
ANSI/INFPA 70 and/or the CSA C22.1, Elec-
trical Code.
Install a 120 VAC cable to the boiler mains (Netz)
connection.
32 Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
PS
PK
Fig. 32 120 VAC Connections
Netz
PZ
120 VAC