Connecting Additional Components - Vaillant atmoTEC exclusive Installation And Maintenance Instructions Manual

4. Guide the power supply cable through the upper cable
trunking and into the electronics box.
5. Carry out the wiring. (→ Page 16)
6. Close the electronics box.
7. Make sure that access to the power supply is always
available and is not covered or blocked.
5.8.4 Connecting controls to the electronics
1. Install the control if necessary.
2. Open the electronics box. (→ Page 16)
3. Carry out the wiring. (→ Page 16)
Conditions: Connecting a weather-compensated control or room temperat-
ure control via eBUS
▶
Connect the control to the eBUS connection.
▶
Bridge terminals 3 and 4 if no bridge is present.
Conditions: Connecting a low-voltage control (24 V)
▶
Connect the control to connection terminals 7, 8, 9.
▶
Bridge terminals 3 and 4 if no bridge is present.
0020214272_04 atmoTEC exclusive, atmoTEC plus Installation and maintenance instructions
BUS 24V
230V
4. Close the electronics box.
5. For multi-circuit controls, change the D.18 Pump mode
from 0 (intermittently operating pump) to 2 (continuously
operating pump).
5.8.5 Connecting the domestic hot water cylinder
to the electricity supply
Applicability: Product with connected domestic hot water cylinder
NTC
C1/C2
1. Observe the set-up instructions for the cylinder retrofit-
ting set.
2. Connect the cable end on the cylinder temperature
sensor to the NTC plug that is available in the cable
harness.
Conditions: Third-party cylinder and external prioritising diverter valve
▶
Connect the cylinder to the C1/C2 plug that is available
in the cable harness.
▶
Set the pump overrun under d.72 to 0 s.
5.9

Connecting additional components

The multi-functional module can be used to actuate two addi-
tional components.
5.9.1 Activating the additional component via the
multi-functional module
Conditions: Components connected to relay 1
▶
Select the parameter D.27 Accessory relay 1 in
Diagnostics menu to assign a function to relay 1.
(→ Page 18)
Diagnostics level 2 diagnostics codes (→ Page 30)
Conditions: Components connected to relay 2
▶
Select the parameter D.28 Accessory relay 2 in
Diagnostics menu to assign a function to relay 2.
(→ Page 18)
Diagnostics level 2 diagnostics codes (→ Page 30)
Installation 5
17