Delta PG PLUS-25 Operations Instructions download pdf (Page 67)

61

Maintenance Procedures

Check Boiler Relief Valve

Inspect the relief valve and lift the lever to

verify flow at least annually or as recom-

mended on the warning tag of the valve.

B e f o r e manually operating the pre s s u r e

relief valve ensure the discharge piping is

d i rected to a suitable place of disposal to

avoid a potential scald hazard. The dis-

charge piping must be full size without

restriction and installed to permit com-

plete drainage of both the valve and line.

If after closing the valve, the valve fails to

seat properly or continually weeps, replace

the relief valve. Ensure the cause of the

relief valve to weep is the valve itself, not

due to system over-pressurization caused

by an expansion tank that is waterlogged or

undersized.

Check Temperature / Pressure Relief Valve

Inspect the T&P relief valve and lift the

lever to verify flow at least annually or as

recommended on the warning tag of the

valve.

B e f o r e manually operating the pre s s u r e

relief valve ensure the discharge piping is

d i rected to a suitable place of disposal to

avoid a potential scald hazard. The dis-

charge piping must be full size without

restriction and installed to permit com-

plete drainage of both the valve and line.

If after closing the valve, the valve fails to

seat properly or continually weeps, replace

the relief valve. Ensure the cause of the

weeping is the valve itself, not due to ther-

mal expansion or a faulty or under-pressur-

ized thermal expansion tank.

Inspection of Ignition Electrode

Remove the ignition electrode from the

burner mounting plate.

Remove any white oxides accumulated on

the electrode using fine grit sandpaper or

steel wool. If the electrode does not clean to

a satisfactory condition, replace the ignitor.

When replacing the ignition electrode,

ensure the gasket is in good condition and

correctly positioned.

Check Ignition Wiring and Ground Wiring

Inspect the burner wiring from the burner

control module to the ground terminal

behind the control panel.

Ensure wiring is in good condition and

securely connected.

Check ground continuity of the wiring

using a continuity meter.

Replace and correct ground wire if ground

continuity is not completed and satisfactory.

Check Control Wiring

Inspect all control wiring located behind

the control panel and at the burner control

module. Ensure wiring is in good condi-

tion and properly connected.

Check Thermostat Limit Settings

Check the position of the Secondary and

Primary Thermostat knobs, refer to Figure 38

and 39 page 54 for recommended settings.

Perform Start-up and Checkout Procedures

Start the unit and perform the start-up pro-

cedure as listed in this manual.

Verify the cold water fill pressure is correct

and the operating pressure of the primary

system is within normal operating range.

Complete the checkout procedures as refer-

enced in this manual.

WARNING

WARNING

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