Engineered Air HVAC Unit DJ-140

Close the upstream manual gas valve

Connect a ¼” (6mm) tube to the outlet pressure tap on the safety shutoff valve

Immerse the opposite end of the ¼” (6mm) tube vertically ½” (13mm) into a clear container of water

Count the number of bubbles appearing during a 10 second period

Is the bubble rate greater than that noted in the manufacturer's table?

If the bubble rate is greater than noted, choose the action taken

If bubble rate is less than noted, remove the ¼” (6mm) tube and reconnect the outlet pressure tap plug

Clean the screen of regulators with vent terminals

Remove scale from burner plates

Ensure holes on burner plates and gas orifices are clear

Refer to motor manufacturer for lubrication recommendations

Remove grease drain plugs and operate motor for 15 minutes before replacing plugs

Ensure not to over grease the motor

Note any severe conditions affecting motor operation

Recommended Motor Lubrication Intervals for motors up to 7.5 HP (5.6 kW)

Check set screws on fan wheel for looseness

Check set screws on fan bearings for looseness

Check set screws on fan pulleys for looseness

Check set screws on motor pulleys for looseness

Tighten set screws where required

Refer to Table I for bearing setscrew torques

WARNING — High Voltage and Moving Parts

Disconnect and lock out power before servicing

Do not bypass any interlock or safety switches

Follow cleaning instructions to reduce mold risk

Document any mold or biological growth and actions taken

Label all wires prior to removal when servicing controls or critical components

Verify proper operation after servicing