Maintenance
5-10
750-204
Profire D/LND
Test for gas leaks and check the valve action several times to ensure proper operation before attempting to relight
the burner.
5.13 — Electrical System
Because of the many types of flame safeguard systems applicable to this equipment, complete descriptions of all
D Series burner electrical systems are beyond the scope of this manual. An individual electrical schematic draw-
ing is shipped with each burner and complete operation and troubleshooting instructions are available from the
various flame safeguard system manufacturers.
5.13.1 — Electric Motors
Motor supply voltage must not vary more than 10% from nameplate ratings. At initial startup and at least once a
year thereafter, check the motor current with a meter while the burner is in high fire position. If the reading
exceeds the nameplate rating plus service factor, determine the cause and correct it immediately. In dusty loca-
tions, clean the motor regularly to assure adequate cooling. Lubricate in accordance with the manufacturer’s
instructions.
5.14 — Extended Shutdown
When shutting down the burner for an extended period of time, the operator should use the following general
guidelines to protect the burner from its surrounding elements. This will add to the operating life of the burner.
1. Turn the main electrical disconnect switch to the burner to OFF.
2. Close all main fuel valves.
3. If the burner operates in a damp environment, cover it with plastic to protect all electrical components from
moisture. Remove the flame safeguard control and store in a dry atmosphere.
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