Electrical Connections; External Connection Board Connections - Buderus Logamax plus GB142-24 Installation And Servicing Instructions

8

Electrical connections

8 Electrical connections
Devices such as pumps, outdoor sensor and 3-way
valve are all connected to the external connection board.
The electrical connections to the appliance must be
made in accordance with all applicable local codes and
the latest revision of the National Electrical Code,
ANSI/NFPA-70
Installations should also conform with CSA C22.
1 Canadian Electrical Code Part 1 if installed in Canada.
8.1 External connection board
connections
Make all electrical connections inside the external
connection box.
Remove the cover of the external connection box
(fig. 22).
Connecting incoming power
The appliance 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, Electrical Code.
Install a 120V cable to the appliance (see fig. 23,
pos. 1).
Lead the cable through the cable guide (see fig. 23,
pos. 2).
Terminals 1 – 6 (fig. 24) are low-voltage connections
and terminals 7 – 10 (fig. 24) are 120 Volt connections.
CAUTION
Risk of electric shock.
Once the main power supply is on then there
is 120V on terminals 7 – 10 (can only be
used with the correct configuration of the
control unit and specific system hydraulics),
if the main switch of the BC10 basic
controller is switched on.
RC terminal
Connector for installation of an RC controller for indoor
reset operation or a module.
FA terminal
This is the terminal where you connect the outdoor
temperature sensor. Only necessary for outdoor
weather responsive operation.
WA terminal
For connection of a potential free thermostat or relay
panel end switch.
FW
Connection for an external DHW tank sensor
We reserve the right to make any changes due to technical modifications!
24
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Fig. 22 Removing the cover from the external connection box
Fig. 23 external connection board
FA FW
RC WA EV DWV
1 2 3 4 5 6
Fig. 24 Connections to external connection board
Abbr. Color Component
RC orange RC Room thermostat connection for a
module
FA blue Outdoor-temperature sensor
WA green Potential-free On/Off thermostat
FW gray DHW temperature sensor
EV red External switching contact, potential-free
for floor heating safety etc.
DWV green Connection for external 3-way valve
PK green Primary loop pump 120V 60Hz
PS gray DHW tank pump 120V 60Hz
PZ lilac DHW recirculating pump 120V 60Hz
Netz white main connection 120V 60Hz
Buderus Hydronic Systems • http://www.buderus.net
1
2
PZ Netz
PK PS
7 8 9 10