Installation - Vaillant VRT 90 Bedienungsanleitung

GB
Programming the heat-up phases
Once you have set the time and day-temperature,
your room-temperature regulator will begin to
operate according to its heating program.
Heat-up phase
with day-temperature 06:00.to.22:00 hours,
lower temperature
If the factory-adjusted basic program does not
meet your requirements, you should alter the
position of the time switch relay contact at the
clock as desired.
12
22:00.to.06:00 hours.
2

Installation

This system MUST be fitted by a qualified and
approved installation engineer, proceeding as
shown in the illustrations on pages 66 to 69. The
relevant safety guidelines should be followed at
all times.
There is a danger of fatal injury from
touching live components. Always shut
off the power supply to the system (and
ensure it cannot be reconnected) BEFORE
carrying out installation or maintenance
work.
Note that we will accept no liability whatsoever
for injury or damage resulting from failure to
observe these instructions. This condition applies
especially to incorrect wiring and/or defective
mechanical installation.
Adjust the Vaillant heating system as shown on
page 68.