Harwil L-30 Supplement

ULTRA RELIABLE SINCE 1956 P. 1
MODEL L-30 HARWIL CORPORATION
541 KINETIC DRIVE, OXNARD, CA 93030
TEL: [phone] FAX: [phone]
EMAIL: [e-mail]
L-30N, L-30R, L-30CR, VERTICAL L-30NV, L-30CRV
STRAIN RELIEF NUT
COVER
4 RETAINING SCREWS
(NOT SHOWN)
MICROSWITCH 15A SPDT
WITH 2 SLIP-ON TERMINALS
DRY CIRCUIT SPDT 0.1A 125 VAC
MICROSWITCH
2 SCREWS
2 NUTS
SPLIT LOCKWASHERS
1 PLAIN WASHER
O-RING
MICROSWITCH BRACKET
1¼” x 1” BUSHING
GRIPPING FLATS
BODY COMPLETE WITH
A) SEAL SHAFT
B) DIAPHRAGM
C) DIAPHRAGM WASHER
D) FEED THRU SHAFT
E) PIVOT PIN
F) CAP (SONICALLY WELDED)
FLOAT SHAFT
FLOAT SHAFT
EXTENDED LENGTH
FLOAT
GROMMET ‘A’
GROMMET ‘AA’
GROMMET ‘B’
GROMMET ‘C’
NOTE: SEAL SHAFT MUST BE GRIPPED DURING
REMOVAL OR INSERTION OF FLOAT SHAFT.
FAILURE TO GRIP SHAFT SECURELY WILL CAUSE
LEAKAGE OF INTERNAL ELASTOMER SEAL.
‘F’ COVER TO SUIT CUSTOMER
SUPPLIED FITTING FOR ½”
FLEXIBLE CONDIUT
INSTALLATION AND OPERATING INSTRUCTIONS

ULTRA RELIABLE SINCE 1956P. 2
HARWIL CORPORATION
541 KINETIC DRIVE, OXNARD, CA 93030
TEL: [phone] FAX: [phone]
EMAIL: [e-mail]
INSTALLATION AND OPERATING INSTRUCTIONS
ELECTRICAL WIRING
MODEL L-30
The L-30 liquid level switch is supplied with a 1½” or 1¼” x 1” bushing, threaded in place with 2 to
3 wraps of Teflon tape, which must be intact or renewed if the bushing and switch are separated be-
fore assembly in the tank. Care must be taken when threading the bushing into plastic or metal fittings.
Apply a minimum of 2 to a maximum of 3 wraps of Teflon tape to the threads of the bushing–this is
especially important if the unit is to be used in metal fittings where coarse METAL THREADS could gall
plastic if not lubricated. The plastic bushing CAN BE CRACKED if the main body of the flow switch is
tightened into it FIRST. Cracking will not occur if the bushing is FIRST tightened into the pipe or tank fit-
ting and THEN the L-30 body is tightened into the bushing.
Thus:
1. Teflon tape thread and tighten plastic bushing into pipe or tank fitting.
2. Teflon tape thread and tighten L-30 switch into a PLASTIC bushing by applying a wrench to
the hexagonal section. Repeat steps 1 and 2 until the ARROW on the body points UPWARD
and threads are leak tight.
Plumber’s tools, such as pipe wrenches, are not recommended. If possible, use a “rigid” type wrench
where the smooth jaws closely fit the hexagonal section.
1. Remove the gland nut, grommet, and switch cover.
2. Strip the outer jacket of the electrical cord back approximately 1¼”. Strip the insulation from indi-
vidual conductors back approximately ¼”.
3. Slip on terminals are supplied with each switch. Remove from switch terminals and crimp on or sol-
der them to the electrical leads.
4. Feed the electrical cable through the gland nut, grommet, and switch cover as shown.
5. Apply slip on terminals to appropriate contacts of the microswitch. Slide the cover down the cable
and fasten it to the body of the switch with the four screws provided. Push the grommet into the
tapered end of the cover. Hold the cable jacket to prevent rotation and thread the gland nut firmly
onto the cover.
¼”
1¼”
L-30N, L-30R, L-30CR, VERTICAL L-30NV, L-30CRV

ULTRA RELIABLE SINCE 1956 P. 3
HARWIL CORPORATION
541 KINETIC DRIVE, OXNARD, CA 93030
TEL: [phone] FAX: [phone]
EMAIL: [e-mail]
LOW LIQUID LEVEL ALARM
Fig 1: Wiring schematic for power applied to load when
liquid level is less than set point (power to load interrupted
when level increases to above set point).
Decreasing liquid level moves actuator in direction shown.
HIGH LIQUID LEVEL ALARM
Fig 2: Wiring schematic for power applied to load when
liquid level is greater than set point (power to load inter-
rupted when level decreases to below set point).
Increasing liquid level moves actuator in direction shown.
MICROSWITCH
NC
NO
(HOT)
LOAD
LINE
COM
MICROSWITCH
NC
NO
(HOT)
LOAD
LINE
COM
Microswitch actuation point may be monitored by an audible click or with an ohmmeter before con-
necting line power to the switch terminals or by monitoring the voltage supplied to the load through the
microswitch.
MODEL L-30
BREAKDOWN OF PARTS DIAGRAMS ON FOLLOWING PAGES
L-30N, L-30R, L-30CR, VERTICAL L-30NV, L-30CRV

ULTRA RELIABLE SINCE 1956P. 4
HARWIL CORPORATION
541 KINETIC DRIVE, OXNARD, CA 93030
TEL: [phone] FAX: [phone]
EMAIL: [e-mail]
# PART NAME QTY PART #
1 STRAIN RELIEF NUT (1) 60127 (N)
65301 (R, CR)
2 GROMMET
#A (OPTIONAL) (1) 10440 (N, R)
65701 (CR)
#AA (OPTIONAL) (1) 10441 (N, R)
65702 (CR)
#B (OPTIONAL) (1) 10442 (N, R)
65703 (CR)
#C (OPTIONAL) (1) 10443 (N, R)
65704 (CR)
3 COVER (MALE) (OPTIONAL) (1) 60125 (N)
65302 (R, CR)
4 COVER (FEMALE) (OPTIONAL) (1) 60126 (N)
65303 (R, CR)
5 SCREW (4) 109-S
6 MICROSWITCH (1) 20103
7 TERMINALS (3) 706-T
8 SCREW (1) 133-S
9 SCREW (1) 116-S
10 NUT (2) 219-N
11 WASHER (2) 311-W
12 WASHER (2) 301-W
# PART NAME QTY PART #
13 BODY (ASSEMBLY ONLY) (1) 65203 (N)
65304 (R, CR)
CLAMP RING (SONIC WELD) (1) 65102 (N)
65305 (R, CR)
14 BUSHING REDUCER (OPTIONAL) (1) 65204 (N)
65306 (R, CR)
BUSHING REDUCER (OPTIONAL) (1) 65205 (N)
65307 (R, CR)
15 FEED-THRU SHAFT (ASSEMBLY ONLY) (1) 65103
A) SEAL SHAFT (1) 65104
B) DIAPHRAGM (1) 65105 (N)
65705 (R, CR)
C) DIAPHRAGM WASHER (1) 65106 (N)
65306 (R, CR)
D) PIVOT PIN (1) 65107
3) CROSS PIN (1) 65108
16 SHAFT #2-B (OPTIONAL) (1) 65208 (N, R)
65708 (CR)
45% (OPTIONAL) (1) 65402 (N, R)
66004 (CR)
17 FLOAT (NORYL) (OPTIONAL) (1) 65601 (N)
FLOAT (RYTON) (OPTIONAL) (1) 65805 (R, CR)
18 FLOAT (POLYPROPYLENE) (OPTIONAL) (1) 65602
19 O-RING (1) 65110
MODEL L-30
9
4
5
3
2
1
12
11
10
19
14
76
8
15
16
17
18
13
L-30N, L-30R, L-30CR, VERTICAL L-30NV, L-30CRV

ULTRA RELIABLE SINCE 1956 P. 5
CERTIFICATE OF CONFORMANCE
All Harwil Corporation (“HARWIL”) products are manufactured using new materials and components.
Our products meet the applicable performance and materials specifications indicated in our current
Specifications Sheets and Parts List. HARWIL endeavors to obtain its materials and components from
American Companies.
DOMINANCE OF HARWIL LIMITED EXPRESS WARRANTY
Each user MUST make appropriate analysis and tests to determine the suitability of the HARWIL product
for the intended use prior to purchase.
HARWIL warrants that all HARWIL products will be free from defects in material and workmanship for a
period of one year from the date of original shipment. This Warranty shall be LIMITED to the replacement
and reconditioning of our products and parts. HARWIL reserves the right and sole discretion to modify
or change the composition, design and appearance of its products at anytime.
THIS WARRANTY SHALL BE IN LIEU OF ALL WARRANTIES OF MERCHANTABILITY AND OF ALL WAR-
RANTIES OF FITNESS FOR A PARTICULAR PURPOSE RELATING TO HARWIL PRODUCTS AND PARTS.
BUYER’S SOLE REMEDY SHALL BE REPLACEMENT OR RECONDITIONING AS SET FORTH HEREIN.
HARWIL SHALL INCUR NO OBLIGATIONS HEREUNDER AND NO LIABILITY IN THE EVENT OF (1)
BUYER NOT FULFILLING ITS RESPONSIBILITIES; INCLUDING AS SET FORTH HEREIN; (2) NEGLECT,
ALTERATION OR IMPROPER PRODUCT USE, INCLUDING USE WITH NON-COMPATIBLE DEVICES OR
CHEMICALS; OR (3) REPAIR BY ANOTHER COMPANY OR PERSON THAN HARWIL.
ANY LAWSUIT RELATING TO THIS LIMITED EXPRESS WARRANTY MUST BE COMMENCED WITHIN
ONE YEAR OF THE DATE THE LAWSUIT ACCRUES.
HARWIL provides NO WARRANTY and ASSUMES NO RESPONSIBILITY for corrosive attack on
any material, component or design features associated with any of its products.
Corrosion resistance information listed in HARWIL specification sheets, information sheets and product
brochures is solely for general background information. This information table has been compiled from
literature published by various material suppliers and by equipment manufacturers who use these materi-
als in their products. Inasmuch as these data are based on tests by entities over which HARWIL has no
control, HARWIL DOES NOT GUARANTEE AND DOES NOT ACCEPT ANY RESPONSIBILITY FOR THE
ACCURACY OF SUCH THIRD PARTY TESTING. When using the table, please remember that in any
given case several factors such as concentration, temperature, degrees of agitation and presence of impu-
rities influence the rate of corrosion. The information table is intended, in a general way, to rate materials
for resistance to chemicals which contain their usual impurities and for types of equipment in common
use. Ratings should be used only as a general tool to first approximation of your material requirements
rather than as the final answer.
WHEN IN DOUBT, TEST MATERIALS BEFORE INSTALLATION.
AFTER INSTALLATION, FOLLOW UP WITH SCHEDULED PREVENTATIVE MAINTENANCE AND
PERIODIC INSPECTION.
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