Checking Outputs (Relay Test) - Viessmann VITODENS 333-F WS3A Service Instructions Manual

Temperatures, boiler coding card and brief scans
Brief scan
d 0

Checking outputs (relay test)

Weather-compensated control unit
Press the following keys:
1. K + d simultaneously for
approx. 2 s.
The following relay outputs can be controlled subject to system design:
Display screen
Base load
Full load
Intern.pump On
Htg. system valve
Valve in middle pos.
DHW valve
Htg.cir.pump M2 On
Mix.valve open
Mix.valve closed
Intern.output On
Htg.cir.pump A1 On
DHW pump On
Recirc.pump On
Centr.fault ind.On
Display screen
0 0
2. a/b
3. d
Explanation
Burner modulation base load
Burner modulation full load
Int. output 20
Diverter valve set to heating mode
Diverter valve in central position (filling/draining)
Diverter valve set to DHW mode
Mixer extension
Mixer extension
Mixer extension
Output sK internal extension
External extension H1
External extension H1
External extension H1
External extension H1
Service scans
(cont.)
Variable Software
speed version
pump Variable
0 w/o speed pump
1 Wilo 0: no vari-
2 Grundfos able speed
pump
for the required relay out-
put.
Relay test is completed.
67