Supplied By www.heating spares.co Tel. 0161 620 6677
11Instructions for use ecoTEC / 838402_06
4.6.2 Switching off heating (summer operation)
1
plus/exclusive
Fig. 4.14 Switching off heating (summer operation)
You can switch off the heating in summer without
switching off the hot water supply.
• Turn the knob (1) for setting the maximum radiator
temperature all the way to the left.
4.6.3 Setting a room- or outside temperature
controller
2
1
Fig. 4.15 Setting a room- or outside temperature controller
• Set the room thermostat (1) and/or the thermostatic
radiator valves (2) according to the instructions sup-
plied with the control(s).
h
Note
Vaillant offer room thermostat/time control ac-
cessories which give accurate and economic room
temperature control as well as improved comfort.
The boiler will now operate automatically to provide
central heating for the conditions selected on the exter-
nal controls (ecoTEC combination boilers will also pro-
vide domestic hot water on demand). After the boiler
stops operating the pump will continue to operate for a
short period to fully disperse the heat from the boiler.
h
Note
The boiler incorporates an anti-cycling eco-
nomiser control to prevent energy wasteful
ON and OFF operation of the boiler for short
periods when in the central heating mode.
When turning the room thermostat to a higher
setting there may therefore be a short delay
before the boiler operates.
4.7 Status displays
1
2
plus/exclusive
Fig. 4.16 Status displays
Display Meaning
Displays during heating operation
S. 0 No heat required
S. 1 Pump running
S. 3 Ignition sequence (heating operation)
S. 4 Burner ignited
S. 6 Fan and pump overrun
S. 7 Pump overrun
S. 8 Anti-cycling mode (after heating operation)
S.30 Room thermostat 3/4 no heating demand
S.31 Summer mode active
S.34 Frost protection mode
Displays in hot water operation (ecoTEC combina-
tion boilers only)
S.10 Hot water demand
S.14 Burner ignited
Displays for hot holding operation
(ecoTEC combination boilers only)
S.20 Hot holding request
S.24 Hot burner holding operation on
Displays in cylinder charging mode
(ecoTEC system boilers only)
S.20 Cylinder charging request
S.24 Cylinder charging burner on
Table 4.1 Status codes (selection, a complete set of status
codes can be found in the installation and servicing
manual)
Operation 4
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