Viessmann ECV Series User Manual

Additional Information
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

Viessmann ECV Series Specifications

General

Brand	Viessmann
Model	ECV Series
Category	Boiler
Language	English