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Viessmann ECV Series - Page 43

Viessmann ECV Series
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43
Troubleshooting Guide (continued)
Fan runs, pilot lights, burner short cycles Remedy
Thermostat anticipator t oo low Set anticipator to 0.9A on mercury bulb thermostats
No ground or weak ground connection on pilot Replace ground wire on pilot burner
Pilot on wrong burner Ensure five-port burner is used (see Fig. 13).
Lack of proper air f low Remove any obstruction from vent or vent terminal, replace
power v enter if deteriorated, clean heat exchanger
Excessive wind Relocate vent terminal, protect from wind with fence or
shrub
Ignition module defective Replace ignition control module
5167 450 v1.4

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