Vaillant ecoTEC plus VU 446/5-5 (H-GB) Installation And Maintenance Instructions Manual page 30

7.11.7.1 Using the additional relay
1. Connect an additional component directly to the integ-
rated additional relay using the grey plug on the PCB.
2. Carry out the wiring. (→ Page 28)
3. Select D.026 to actuate the connected component.
(→ Page 40)
7.11.7.2 Using the VR 40 (2 in 7 multi-functional
module)
1. Install the components in accordance with the respect-
ive instructions.
2. Select D.027 to actuate relay 1 on the multi-functional
module. (→ Page 40)
3. Select D.028 to actuate relay 2 on the multi-functional
module. (→ Page 40)
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Installation and maintenance instructions ecoTEC plus 0020261389_03