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MAINTENANCE GUIDE
5. ANNUAL MAINTENANCE
Plate heat exchanger
Maintenance Interval: As necessary
How: To measure speci cation of DHW performance.
By-pass & Safety valve
Maintenance Interval: Annually
How: Visual inspection / Clean as necessary
Central heating lter
Maintenance Interval: Annually
How: Visual inspection / Clean as necessary
Flow switch operation
Maintenance Interval: Annually
How: Visual inspection / Clean as necessary / Check ow rate
Expansion vessel
Maintenance Interval: Annually
How: Check air pressure is at 1 bar (System drained)
Ignition & detection electrodes
Maintenance Interval: Annually
How: Visual inspection / Clean as necessary / Distance from the burner / Ionisation current
more than 1 A
Burner
Maintenance Interval: Annually
How: Visual inspection / Clean as necessary
Fan
Maintenance Interval: Annually
How : Visual inspection / Clean as necessary