8
6
Fig.6
Connecting external appliances to the ZIO board
U1 - master appliance
Tzas - DHW Cylinder temperature sensor (WE-008)
Tco2 - second heating circuit temperature sensor (WE-008)
Tzew - outdoor temperature sensor
Tpok - room temperature sensor
U3 - DHW Cylinder thermostat
U2 - device for night or antifreeze work mode
U+ - valve supply - 230V (open/heating)
U- - valve supply - 230V (close)
N - neutral conductor
U - pump supply - 230V
N - neutral conductor
PE - protective conductor
PE - protective conductor
N - neutral conductor
U - pump supply - 230V
LB - valve supply of B circuit (DHW Cylinder)
LA - valve supply of A circuit (central heating system)
N - neutral conductor
ZTM – three way mixing valve (under-floor heating or second heating circuit)
PUMP A2 - second circuit pump
CWU - DHW pump
ZAS - three-way switching valve (DHW Cylinder)
To
tal output current < 2A
Connecting external appliances to the ZIO module
A number of other appliances or necessary sensors (fig. 6) can be connected to the boiler according to the in-
dividual requirements. The temperature sensors should be connected using a LIYY 2x0,14 or similar type of wire.
Pay special attention to the sensors ending, incorrect wiring may result in short circuit. The connecting wire lengths
must be limited. A long wire may cause interference and faulty sensor operation. The wires must not be run in the
same conduit with (or too close to) electrical wiring, and must not be wrapped around any other wires or cables.
The sensor location is essential for its proper functioning.
Outdoor temperature sensor should be installed in the coolest place in the building (north building side), relatively
far away from heat source (e.g.windows that can be opened, ventilation ducts, chimneys and other heated surfaces).
Do not install the outdoor sensor in the place exposed to direct sunshine.
Indoor temperature sensor must be located inside the building, in the most commonly used room, relatively far away
from windows, radiators, doors and other places that may have affect on correct temperature measuring. The indoor
temperature sensor is optional accessory. For more information about sensor see page 19 -
„
Room temperature sensor
”
.
Master appliance –
you can limit the boiler electricity consumption by connecting the master appliance (e.g.
instantaneous water heater) – see fig.6. The master appliance must be equipped with the relay output. The output
should be connected to the NA entry in the ZIO board by using LIYY 2 x 0,14 or similar type of wire.
Do not con-
nect any voltage to NA entry!
Use an appropriate relay if the master appliance can control the voltage signal only.
NA entry must remain closed if not used!
8
Instruction for the installer
Please refer to the appropriate section of this manual for ZIO board work details.
DHW temperature reading
Controller can measure a water temperature for: a) cylinder thermostat equipped with a free voltage output. b)
cylinder temperature sensor (WE-008 offer by Kospel S.A.- optional equipment) Set the
„
Extended Menu
”
for option
a or b. For thermostat contacts and cylinder sensor connection details see fig.6.
