750-204
Profire D/LND
3-3
3.2 — Electrical Interference Test
heater should be adjusted to give the designed operating temperature. Where the burning characteristics of the
fuel are unknown, the following may be considered as typical:
3.1.4 — Air-Oil Tank (Lube Oil)
Check the lube oil level in the air-oil tank. Inspect oil level regularly. Loss of oil will damage the compressor. Fill
the tank with non detergent SAE30 oil to a level midway up the sight glass. Do not overfill the tank.
For a normal environment use SAE30 oil. For a 32º F and below environment sue SAE 10 oil. Change the oil
every 2000 hours of operation.
3.1.5 — Firing Preparations for Gas Burners
A representative of the gas utility should turn on the gas. Determine by a test gauge upstream of the burner reg-
ulator that sufficient pressure exists at the entrance to the gas train. The gas pressure regulator must be adjusted
to the pressure required and the pressure setting recorded.
On combination fuel models, set the selector switch to “Gas.” On initial startup, it is recommended that the main
gas shutoff cock remain closed until the programmer has cycled through pre-purge and pilot sequences to deter-
mine that the main gas valve opens. Turn the burner switch “OFF” and let the programmer finish its cycle. Check
to see that the gas valve closes tightly. Set the high and low gas pressure switches.
Check for leaks and determine there is adequate gas pressure available at the burner for operating at full capac-
ity. Check with the local utility if necessary. Check gas pressure at the pilot and the main burner. Close the man-
ual gas valve.
3.2 — Electrical Interference Test
Prior to putting the burner into service, conduct the following test to ascertain that the ignition spark will not
cause the flame relay to pull in.
3.2.1 — Gas Fired
1. Close the pilot and the main line manual gas valves.
2. Start the burner and at the time of the pilot trial with just the electrical ignition system energized, the flame
relay should not pull in (be energized).
3. Upon completion of a successful test, proceed with startup procedures.
3.2.2 — Oil Fired
1. disconnect the electrical power to the burner.
2. Disconnect the electric oil safety shutoff valve.
3. Reconnect electric power to the burner.
No. 4 80º - 125º F
No. 5L 115º - 160º F
No. 5H 145º - 180º F
No. 6 180º - 220º F
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