Heavy Duty Balanced Opposed Compressors - Ariel Corporation

Section 2 - Instrumentation For Models: JGH:E:K:T
DNFT Installation
1. Loosen the Allen set screws on the DNFT and remove
magnet housing. Do not remove magnet, spring, or spacer
from magnet housing.
2. Remove piston enclosure plug from end of desired divider
valve. The DNFT installs on any of the divider valves of the
divider block. The DNFT requires the correct magnet
assembly to match the divider valve manufacturer (see
Fig. 2-6).
NOTE: Do not install a DNFT on Lincoln divider valves
with cycle indicator pins.
3. If applicable, verify o-ring or metal gasket is in place on
magnet housing. Thread magnet housing into end of
divider valve. Torque to 15 foot pounds maximum.
4. Slide DNFT all the way onto hex of magnet housing.
Torque Allen set screws on hex of magnet housing to 25
inch pounds, maximum.
5. The LED on the DNFT indicates each divider valve cycle to allow lubricator pump adjustment for
Ariel recommended cycle time and oil consumption. If the LED fails to blink during compressor
operation or by manually pumping oil into the divider valve, then the DNFT requires adjustment.
6. The divider valve must cycle during
DNFT adjustment. To cycle it, either
run the compressor or manually pump
oil through the distribution block with a
hand priming pump.
1 2 3 4
5 6 7
8
7. To adjust, slide DNFT all the way onto
hex of magnet housing. Tighten Allen
set screws to 25 inch pounds maxi-
12S
mum. A blinking LED indicates correct
adjustment. If the LED fails to blink
with divider valve cycling, slide DNFT
12T 9
back on the hex of the magnet housing
in 1/16" increments until it does.
10
8. Make all conduit and connections
appropriate for area classification.
Support conduit and fittings to avoid
bending the magnet housing.
9. After DNFT installation and before
compressor start-up, purge all air from
divider block lubrication system with a
purge gun.
1. Divider Valve Piston
2. Magnet
3. Magnet Housing
4. O-Ring
5. Allen Set Screws (2)
SBCO & Trabon O-Ring Seal 7/16”-20
Trabon Metal Gasket Seal 7/16”-20
(1994 or earlier)
Lincoln O-Ring Seal 7/16”-20
Extended Nose
FIGURE 2-6 Typical DNFT Magnet
Assemblies
6. LED
7. Control Housing
8. Wire Leads (7)
9. Divider Valve
10. Piston Enclosure Plug
FIGURE 2-7 Typical DNFT Installation
NOTE: When installing multiple DNFTs, wire each to a separate alarm circuit of the control
panel, annunciator, or PLC to simplify lubrication system and DNFT troubleshooting.
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