R-Series Electric
20
CQF3473 v.01
Operation & Service
April 17, 2018
Guide to Maintenance
To obtain reliable and satisfactory service, this unit requires a consistent preventive maintenance
schedule. Maintenance schedule pages are included in the back of this manual to aid in keeping the
proper records.
Before performing any maintenance function, switch main disconnect switch to "off" position to
assure no power is entering unit. "Lock Out" or "Tag Out" all sources of power. Be sure all air
pressure in unit is relieved. Failure to do this may result in injury or equipment damage.
Do not exceed 15 PSIG nozzle pressure when cleaning element parts with compressed air. Do not
direct compressed air against human skin. Serious injury could result. Never wash elements in fuel
oil, gasoline or flammable solvent.
Never operate unit without belt guard in place. Removal will expose rotating parts which can cause
injury or equipment damage.
Valves must be reinstalled in original position. Valve gaskets should be replaced each time valves
are serviced.
PRESSURE RELIEF VALVE: The pressure relief valve is an automatic pop valve. Each valve is properly
adjusted for the maximum pressure permitted by tank specifications and working pressure of the
unit on which it is installed. If it should pop, it will be necessary to drain all the air out of the tank in
order to reseat properly. Do not adjust.
TANK DRAIN VALVE: Drain valve is located at bottom of tank. Open drain valve daily to drain
condensation. Do not open drain valve if tank pressure exceeds 25 PSIG. The electric tank drain-
equipped compressor requires draining manually once a week.
PRESSURE SWITCH: The pressure switch is automatic and will start compressor at low pressure and
stop when the maximum pressure is reached. It is adjusted to start and stop compressor at the
proper pressure for the unit on which it is installed. Only a certified field service technician should
make adjustments to the pressure switch.
