WHITLOCK INSTRUMENT DNFT-LED-PS User manual

DESCRIPTION
OPERATION
SPECIFICATIONS
Material...........................................Stainless Steel, Aluminum
00
Temperature Range.................................... -40 F to +185 F
Switch Rating................................................2.5VA/240 VDC
Epoxy Encapsulated............UL LISTED EL-CAST VFR 641
Alarm/Shutdown............. Factory default for 3 minute alarm
Power..............................Field Replaceable - Lithium Battery
Battery................................................................. P/N 000505
Alternate Battery...............................Radio Shack 960-0418
Divider Block Application..............Dropsa/Lincoln/SBCO/
Lubriquip
Warranty...................................................................2.5 Years
MONITORS MOVEMENT OF DIVIDER
VALVE PISTON FOR DEPENDABLE
"TIMED" SHUTDOWN PROTECTION
CLOSED LOOP OR OPEN LOOP OPERATION
INSTALLS DIRECTLY TO DIVIDER VALVE
N OT A F F E C T E D B Y T E M P E R AT U R E O R O I L
VISCOSITY
REQUIRES NO EXTERNAL POWER
LED INDICATOR - CYCLE INDICATION
DEDICATED SWITCH CLOSURE TO MONITOR
EACH DIVIDER VALVE CYCLE (PS OPTION)
FIELD REPLACEABLE BATTERY
507LIT LED-WI-1
07.11.01
RATINGS
R
DIGITAL NO-FLOW TIMER
U.S. PAT. NO. 5,835,372
DNFT
DNFT-LED-PS
P/N: 000507
DNFT-LED-PS
DIGITAL NO-FLOW TIMER
R
3-MIN3 - M I N
2.5VA / 240VDC2.5VA / 240VDC
LED-PSLED-PS
U.S. PAT. NO. 5,835,372
RED-Open Loop ORANGE-Closed Loop GRN-Ground YEL -Prox. SWI.
MODEL
RATED
SERIAL #
PN
ALARM
Factory Sealed
CYCLE INDICATION
0005070 0 0 5 0 7
ODESSA, TX USA
INSTRUMENTINSTRUMENT
WHITLOCKWHITLOCK
1-800-337-34121-800-337-3412
www.noflo.comwww.noflo.com
ODESSA, TX USA
INSTRUMENTINSTRUMENT
WHITLOCKWHITLOCK
1-800-337-34121-800-337-3412
www.noflo.comwww.noflo.com
Distributed by:
The DNFT-LED is a totally enclosed electronic device, combining
the latest technology in microprocessor and transistor
components for detecting Slow-Flow and No-Flow of divider block
lubrication systems. The DNFT incorporates an oscillating crystal
to accurately monitor the cycle time of the lubrication system to
enable precision timed shutdown capability. The magnet
assembly and control housing mount directly to the divider valve to
become an integral part of the lubrication system. The DNFT
operates on a field replaceable lithium battery. If battery voltage
drops below normal operating levels the DNFT goes into alarm
mode and the unit cannot be restarted. LED models utilize an LED
to indicate each cycle of the divider valve. This enables the
operator to easily set and monitor lubrication rates.
Lubricant flow through the divider valve assembly forces the
pistons to cycle back and forth causing a lateral movement of a
magnet linked to the piston. Movement is monitored by the
microprocessor which resets the timer, lights the LED, and allows
the unit to continue operation, this indicates one complete cycle
of the lubrication system. The microprocessor must receive this
cycle in a predetermined time or a shutdown will occur. The
DNFT will automatically reset alarm circuit when normal
operation of divider valve resumes.
WHITLOCK INSTRUMENT
1300 N. Texas
Odessa, TX 79761
432.3373412 Fax [phone]
1.800.337.3412 www.noflo.com
186200
CE
Cl I; Div 1; Grps. A,B,C,D;T4
Cl I; Zone 1; Ex md IIC T4
0344
KEMA 00ATEX1090 X Amb. -40° C...+80°C
R
USC
R
USC
Cl I; Zone 1; Ex md IIC T4
II 2G EEx md IIC T5
186200
CE
Cl I; Div 1; Grps. A,B,C,D;T4
Cl I; Zone 1; Ex md IIC T4
0344
KEMA 00ATEX1090 X Amb. -40° C...+80°C
R
USC
R
USC
Cl I; Zone 1; Ex md IIC T4
II 2G EEx md IIC T5

507LIT LED-PS WI -2
06.05.01
DNFT
R
DIGITAL NO-FLOW TIMER
U.S. PAT. NO. 5,835,372
P/N 000507 DNFT-LED-PS DIGITAL NO-FLOW TIMER WITH DEDICATED PROXIMITY SWITCH.
INSTALL ON SWITCH RATING 2.5VA 240VDCDROPSA/LINCOLN/SBCO/LUBRIQUIP DIVIDER BLOCK.
000507
WIRING LEGEND
CAUTION: DISCONNECT ALL WIRING PRIOR TO WELDING ON COMPRESSOR OR SKID.
INTERNAL VIEW OF
DIVIDER VALVE
(E)
O-RING OR
METAL GASKET
(F)
24S PISTON ENCLOSURE PLUG
(D)
24S
DNFT-LED-PS
DIGITAL NO-FLOW TIMER
R
3-MIN
3-MIN
2.5VA / 240VDC
2.5VA / 240VDC
LED-PS
LED-PS
U.S. PAT. NO. 5,835,372
RED-Open Loop ORANGE-Closed Loop
MODEL
RATED
SERIAL #
PN
ALARM
186200
CE
R
USC
Cl I; Div 1; Grps. A,B,C,D;T4
Cl I; Zone 1; Ex md IIC T4
Factory Sealed
CYCLE INDICATION
0344
KEMA 00ATEX1090 X Amb. -40° C...+80°C
II 2G EEx m IIC T5
000507
000507
GRN-GND YEL-PROX. SWI.
RED
ORANGE
ORANGE
RED
GREEN
YELLOW
YELLOW
DNFT
(B)
MAGNET
(H)
POLARIZED CONNECTOR
CONTROL HOUSING
SPRING
SPACER
LED
#22 AWG 18" LEADS (7)
(I)
O-RING
(F)
1/2“ PIPE PLUG
FIELD REPLACEABLE
BATTERY
P/N:000505
MAGNET
HOUSING
(C)
ALLEN HEAD
SET SCREWS(2)
(A)
RED
RED
GREEN
ORANGE
ORANGE
YELLOW
YELLOW
RED
YELLOW PROXIMITY
SWITCH
GREEN GROUND
CONTROL PANEL
ANNUNCIATOR
OR PLC
ORANGE
INSULATE
FROM CONTACT
RED
OPEN LOOP MODE
NOTE: WIRING CONNECTION
FOR UNIT IN OPERATION
YELLOW PROXIMITY
SWITCH
GREEN GROUND
CONTROL PANEL
ANNUNCIATOR
OR PLC
RED INSULATE
FROM CONTACT
ORANGE
ORANGE
CLOSED LOOP MODE
NOTE: WIRING CONNECTION
FOR UNIT IN OPERATION
RED..................NORMALLY OPEN OPERATION
ORANGE..........NORMALLY CLOSED OPERATION
GREEN.............CASE GROUND
YELLOW...........DEDICATED PROX. SWITCH
UNIT MUST BE SECURELY GROUNDED. DISCONNECT
ALLWIRING PRIOR TO WELDING ON SKID.
DNFT-LED-PS
000507
000507
1. Loosen all Allen head set screws (A) on DNFT (B) and remove magnet housing (C). Do not remove magnet, spring or spacer
from magnet housing.
2. Remove piston enclosure plug (D) from end of divider valve where DNFT will be installed. The DNFT does not have to be
installed on the top divider valve. It may be installed on any convenient divider valve, top to bottom. (Notice:Do not install DNFT
on Lincoln divider valves with cycle indicator pins or any Dropsa divider valve less than SMX 16.)
3. Be sure O-ring or metal gasket (F) is in place on magnet housing (C). Screw magnet housing (C) into end of divider valve (E).
Torque to 15 foot pounds max.
4. Slide DNFT (B) all the way onto hex of magnet housing (C). Tighten set screws on hex of magnet housing. Torque 25 inch
pounds max.
5. The LED on the DNFT indicates each divider valve cycle. This enables operator to adjust the lubricator pump for correct cycle
time and oil consumption recommended by compressor manufacturer. If LED does not blink with compressor running or by
manually pumping oil into divider valve, the DNFT must be adjusted. Normal cycle indication is a bright strobe type blink.
6. Before adjusting DNFT, divider valve must be cycling. This can be achieved with the compressor running or by manually
pumping oil through the divider valve assembly with a hand priming pump.
7. Adjustment is made by sliding the DNFT (B) all the way on the hex of the magnet housing (C). Tighten set screws on hex of
the magnet housing to 25 inch pounds max. Check for LED blink to confirm correct adjustment. If LED does not blink with divider
valve cycling, adjust the DNFT back in 1/16" increments. Correct adjustment of the DNFT is confirmed by blinking LED.
8. All conduit and connections should be appropriate for area classification. Notice: Conduit and fittings must be supported to
avoid bending magnet housing.
9. After installing magnet assembly and pre-compressor start-up, it is absolutely necessary to purge all air from divider
block lubrication system. This can easily be accomplished with a lubrication system purge gun.
10.DNFT must be installed with correct magnet assembly for each divider valve manufacturer.
Lincoln-7/16"-20 extended nose with O- ring Dropsa
Trabon-1994 or earlier 7/16"-20 with metal crush gasket SBCO & Trabon-1995 and up 7/16"-20 with O-ring
Notice: When installing more than one DNFT, each DNFT must be wired to a separate alarm circuit
of the control panel, annunciator or PLC to simplify troubleshooting the lubrication system and DNFT.
ODESSA, TX USA
INSTRUMENT
INSTRUMENT
WHITLOCK
WHITLOCK
1-800-337-3412
1-800-337-3412
www.noflo.com
www.noflo.com
ODESSA, TX USA
INSTRUMENT
INSTRUMENT
WHITLOCK
WHITLOCK
1-800-337-3412
1-800-337-3412
www.noflo.com
www.noflo.com
WHITLOCK INSTRUMENT
1300 N. Texas
Odessa, TX 79761
432.3373412 Fax [phone]
1.800.337.3412 www.noflo.com

1. LED does Not
Blink, Control
Panel Indicates
Lube No-Flow
(See also, 3.Erratic shutdown)
D. Bent Magnet Housing
DNFT
A. Improperly Adjusted
NOTICE: WHEN MORE THAN ONE DNFT IS INSTALLED ON THE COMPRESSOR OR ENGINE, EACH DNFT MUST BE WIRED TO A SEPARATE ALARM
CIRCUIT ON THE CONTROL PANEL, ANNUNCIATOR OR PLC TO SIMPLIFY TROUBLESHOOTING THE LUBRICATION SYSTEM AND DNFT.
B. Spring or Magnet is
Assembly
Broken in Magnet
MAGNET SPACER SPRING
MAGNET HOUSING (HEX)
STRAIGHT OK ! BENT REPLACE !
PISTON
ENCLOSURE
PLUGS
System.
Divider Valve
B. Air or Debris in
OUTLET PLUGS
ELETRICAL TESTING OF DNFT ALARM CIRCUIT
PROBLEM POSSIBLE CAUSE SERVICE PROCEDURE AND / OR CORRECTION
TROUBLESHOOTING DNFT-LED-PS
Remove the battery from the DNFT per the attached instructions. Replace the
battery if the voltage is below 2.5 volts using a factory recommended replacement
battery.
C. Low Battery voltage
CAUTION: DISCONNECT ALL WIRING PRIOR TO WELDING ON COMPRESSOR OR SKID.
DIVIDER VALVE
TYPICAL INSTALLATIONDNFT
24S
INTERNAL VIEW OF
DIVIDER VALVE
PISTON ENCLOSURE PLUG
O-RING OR
METAL GASKET
24S
Faulty Lube Pump
Loosen set screws, remove DNFT from magnet housing. Check for damaged or
bent magnet housing. Remove magnet assembly from divider valve. Replace
magnet housing, magnet, spring and spacer. Re-install DNFT on magnet
housing. If necessary, adjust DNFT, check for LED blink. Purge air from
system with lubrication system purge gun.
1. NORMALLY OPEN - Attach ohmmeter to red wires. Meter should read 10
megaohms in operation and less than 10 ohms in alarm state.
2. NORMALLY CLOSED - Attach ohmmeter to orange wires. Meter should
read less than 10 ohms in operation and infinity in alarm state.
Loosen set screws and remove DNFT from magnet housing. Check for correct
magnet housing for divider valve manufacturer. Remove and replace with correct
magnet housing. Replace DNFT on magnet housing. If necessary adjust DNFT,
check for LED blink. Purge air from system with lubrication system purge gun.
Check system pressure insure oil is flowing to divider valves. If necessary
install pressure gauge to monitor operation of lubrication system.
1. Loosen outlet plugs in front of valve blocks. Fast purge the system with
lubrication system purge gun until clean, clear, air free oil appears from plugs.
2. Loosen each piston enclosure plug individually to purge air from behind
piston. Do not remove piston enclosure plugs. Tighten all divider valve plugs.
Adjust DNFT. To insure proper operation of the divider block lubrication
system, it is absolutely necessary that all tubing and components be filled
with oil and free of air before start-up.
Check system pressure to insure oil is flowing to divider valves. If necessary,
install pressure gauge to monitor operation of lubrication system. Check gauge
to insure pump will build sufficient pressure to inject oil into cylinder. You cannot
check for oil flow into cylinder by removing tubing from check valve and pumping
oil to atmosphere. Replace pump.
Loosen set screws, remove DNFT from magnet housing. Remove magnet
assembly from divider valve. Remove magnet, spacer and spring. Check
components for damage. Replace damaged spring and/or magnet and install on
divider valve. If necessary, adjust DNFT, check for LED blink. Purge air from
system with lubrication system purge gun.
Loosen set screws, slide DNFT all the way onto hex of magnet housing and
torque to 25 inch pounds max.(Do not over tighten) Cycle divider valve by
pumping clean oil through system with lubrication system purge gun or running
compressor. If necessary, adjust DNFT 1/16“ back until LED blinks with each
cycle of divider valve.
2. After installation of
DNFT, Rupture Disc is
Blown and Divider Valve
is Locked up.
A.Wrong Magnet Housing.
Installed on Divider Valve
(See magnet assy. Below)
RED
RED
ORANGE
ORANGE
GREEN
YELLOW
507LIT LED-PS-WI-3
06.05.01
U.S. PAT. NO. 5,835,372
R
DIGITAL NO-FLOW TIMER
DNFT
ODESSA, TX USA
INSTRUMENT
INSTRUMENT
WHITLOCK
WHITLOCK
1-800-337-3412
1-800-337-3412
www.noflo.com
www.noflo.com
DNFT-LED-PS
DIGITAL NO-FLOW TIMER
R
3-MIN
2.5VA / 240VDC
2.5VA / 240VDC
LED-PS
LED-PS
U.S. PAT. NO. 5,835,372
RED-Open Loop ORANGE-Closed Loop GRN-Ground YEL -Prox. SWI.
MODEL
RATED
SERIAL #
PN
ALARM
186200
CE
R
USC
Cl I; Div 1; Grps. A,B,C,D;T4
Cl I; Zone 1; Ex md IIC T4
Factory Sealed
CYCLE INDICATION
0344
KEMA 00ATEX1090 X Amb. -40° C...+80°C
II 2G EEx m IIC T5
000507
000507
ODESSA, TX USA
INSTRUMENT
INSTRUMENT
WHITLOCK
WHITLOCK
1-800-337-3412
1-800-337-3412
www.noflo.com
www.noflo.com
WHITLOCK INSTRUMENT
1300 N. Texas
Odessa, TX 79761
432.3373412 Fax [phone]
1.800.337.3412 www.noflo.com
DNFT must be installed with correct magnet
assembly for each divider valve manufacturer.
Magnet Assemblies and Applications
Trabon Metal Gasket Seal
1994 or Earlier
7/16"-20
Lincoln O-Ring Seal
Extended Nose
7/16"-20
SBCO &TRABON
O-Ring Seal
7/16"-20
Dropsa No Gasket
Raised Shoulder
Magnet Assy # 000011
Magnet Assy # 000012
Magnet Assy # 000004
Magnet Assy # 000013

1. Shut down the engine or set the bypass timer.
2. Use a 3/8" ratchet to remove the 1/2" NPT Pipe plug.
3. Remove the battery from the DNFT and disconnect from the polarized connector.
4. Connect the new battery to the attached polarized plug.
5. Reinsert the battery and reinstall 1/2" NPT Pipe plug.
6. Verify the DNFT is working by pre-lubing the system and check for LED blink.
ITEMS REQUIRED FOR REPLACING THE DNFT BATTERY:
(1) P/N: 000505 BATTERY or RADIO SHACK P/N: 960-0418 (alternate replacement)
(1) 3/8“ RATCHET WRENCH (for removal of battery plug)
For any further information or questions, please contact:
DNFT BATTERY REPLACEMENT INSTRUCTIONS
Directions for replacing the battery in the Digital No Flow Timer.
MAGNET
(H)
POLARIZED CONNECTOR
CONTROL HOUSING
(B)
SPRING
SPACER
LED
#22 AWG 18" LEADS (7)
(I)
O-RING
(F)
1/2“ PIPE PLUG
FIELD REPLACEABLE
BATTERY
P/N: 000505
MAGNET
HOUSING
(C)
ALLEN HEAD
SET SCREWS(2)
(A)
RED
RED
GREEN
ORANGE
ORANGE
YELLOW
507LIT LED-PS-WI-4
06.05.01
R
DIGITAL NO-FLOW TIMER
U.S. PAT. NO. 5,835,372
DNFT
ODESSA, TX USA
INSTRUMENTINSTRUMENT
WHITLOCKWHITLOCK
1-800-337-34121-800-337-3412
www.noflo.comwww.noflo.com
WHITLOCK INSTRUMENT
1300 N. Texas
Odessa, TX 79761
432.3373412 Fax [phone]
1.800.337.3412 www.noflo.com
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