Roberts Gorden DUAL AIR DAT90 - Manual (Page 35)

SECTION 13: S ERVICING
29
13.5 Gas Control Valve Maintenance
No regular maintenance is required on these
devices. To change gas control valves, See Page
36, Step 16.1
and Page 40, Section 16.5.
Do not repair or disassemble on site.
Replace faulty gas valves with genuine
ROBERTS GORDON
® replacement parts.
13.6 Flue Fan
The flue fan should not require maintenance.
However, If the air pressure switch is causing burner
lockout then remove the flue fan from the vent box.
See Page 39, Section 16.4
. Ensure that the fan is
free to run and that the fan wheel is clean.