Delta PG PLUS-25 Operations Instructions download pdf (Page 68)

62

Maintenance Procedures

Check Burner Flame

Inspect the burner flame through the obser-

vation port on the burner mounting plate.

If flame pattern is not fully blue and covers

the entire burner surface, shut the unit

down and allow it to cool thoroughly.

Close the manual gas valve on the gas sup-

ply line and disconnect the gas piping to

remove the burner assembly from the unit.

Remove the burner head mounting screws

and remove the burner head. Inspect the

head for deterioration. Use compressed air

or a vacuum to clean the burner head.

Remove the venturi and gas valve assem-

bly from the blower.

Use the vacuum cleaner or compressed air

to clean the interior of the blower assembly.

Inspect the blower blades to ensure they are

clean and not damage.

Re-assemble the venturi and gas valve onto

the blower. Ensure the venturi gasket is in

good condition and positioned correctly.

Re-assemble the burner head onto the

mounting plate. Ensure the burner head

gasket is in good condition and positioned

correctly.

Re-assemble the gas supply connection and

open the manual gas valve placing the unit

back into service.

Flame Signal

The flame signal should be at least 0.6µ Α.

Refer to the PERFORMANCE PLUS

Trouble-shooting Guide for information on

checking the flame signal.

Check the ignitor for fouling or damaged

insulation if a low flame signal is read.

Check ground wiring and continuity as a

cause for low flame signal. Replace igni-

tor if ground and continuity conditions

are satisfactory.

Check Combustion Levels

Refer to page 53 of this manual for mea-

suring combustion levels and burner

adjustments.

Review With Owner

Ensure the owner understands the impor-

tance to perform the maintenance schedule

specified in this manual.

Remind the owner of the importance to call

a licensed contractor should the unit or sys-

tem exhibit any unusual behavior.

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