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PAGE # 10
PF-50 Series Filter (ver. 4/5/05)
ELECTRICAL CONTROLS
The PF-50 series filter can be supplied in a number of configurations and voltages including
460v/3Ø/60hz, 230v/3Ø/60hz, 208v/3Ø/60hz. Primary voltage will be reduced to 120v control voltage.
Control components will vary depending on filter configuration and options. Standard voltage for base unit
is 120v/1Ø/60hz
1. Standard filter units supplied with automatic backwash and pump are equipped with a NEMA type 3R
control cabinet containing a locking combination on/off disconnect switch with motor circuit protection
(MCP), control transformer (primary/120v secondary), adjustable backwash timer, 24 hour backwash time
clock, magnetic motor starter (external backwash source units only), pressure differential switch, electric
valve actuator, terminal strip and manual override push button.
2. Manual filter units are provided with a manually controlled valve positioner and exclude all control
components and motor protection.
NOTE:
Optional control items may include: programmable logic controller (PLC), indicating lamps, delay
timer, audio and visual alarms, dry contact signals, and hand-off-auto (HOA) switch
.
NOTE:
A NEMA type 4X polycarbonate enclosure may be supplied as an altenative to the coated
steel NEMA type 3R enclosure on certain units.
