INSTALLING THE LLS SERIES PRESSURE SWITCH
WARNING: PERFORM THE INSTALLATION WITH POWER SOURCE “OFF”. NEVER EXCEED RATED PRESSURE RANGE FOR THE UNIT. USE WRENCH ON SHANK TO TIGHTEN/LOOSEN CONNECTIONS. DO NOT TWIST THE ENCLOSURE WHEN SCREWING THE LLS INTO THE PROCESS – THIS WILL DAMAGE INTERNAL COMPONENTS, FILLED MECHANISM AND THE SEALS. DO NOT OVERTIGHTEN THE UNIT.
Connecting the LLS and LLSB Series
To install the LLS and LLSB Series, a vertical mounting is recommended.
1.The unit threads directly into a 2 in.
CAUTION: DO NOT TAMPER WITH OR BREAK SEALED CONNEC-
TIONS. APPLY PIPE SEALANT TO PROCESS CONNECTION THREADS.
2.Tighten the bottom housing to the lead line tee using ONLY the transmitter wrench flats (see figure 1).
3.Check for leakage on any of the connections. Make sure that the installation conforms with local and other applicable codes.
Figure 1 | Do NOT Tamper with | |
Do NOT Tamper with | ||
these Sealed Connections | ||
This Connection |
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Wrench Flats |
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2 in. NPT |
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Lead line tee |
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Connecting the LLSR and LLSRB Series
For mounting the switch enclosure refer to “ Dimensions” on page 2. The following instructions are based on the usage of a PD8187 Pulsation Dampener option shown in Figure 2 (at right.)
1.Install sensor/pulsation dampener into pressure source connection.
CAUTION: THE PD8187 PULSATION DAMPENER IS NOT INTENDED
AS A SHUTOFF VALVE. APPLY PIPE SEALANT TO THE THREADS.
2.Loosen the eight housing bolts until the bottom housing is free to turn.
CAUTION: WHEN LOOSING THE EIGHT HOUSING BOLTS, MAKE
SURE NOT TO UNSCREW THE GREEN DIAPHRAGM CAPSULE.
3.Tighten the bottom housing to the pulsation dampener connection.
4.Tighten the eight housing bolts to 25±3 foot lbs. Stagger the tighten- ing to assure even clamping.
5.Route capillary away from heat source (exhaust manifold). Excess capillary should be carefully coiled and secured (do NOT cut it).
Figure 2
Housing
Bolts
Wrench
Flats
1 in. NPT
Transmitting Tubing (capillary)
Diaphragm
Body
Pulsation Dampener (optional)
Lead Line Tee
WIRING THE LLS SERIES PRESSURE SWITCH
WARNING: PERFORM THE WIRING OPERATION WITH THE POWER SOURCE “OFF”. MAKE SURE VOLTAGE AND CURRENT REQUIRE- MENTS ARE WITHIN THE LLS RATINGS. BEFORE WIRING THE UNIT DETERMINE VOLTAGE AND POLARITY FOR THE APPLICATION.
IF THE UNIT IS USED IN HAZARDOUS AREAS, MAKE THE AREA SAFE BEFORE REMOVING THE
If switch trip point needs to be adjusted, see page 4.
LLS Series Hook-up (all models)
To wire the LLS Series, use proper the electrical conduit.
1.A
Schematic
NC
SPDT C
NO
P P 
NC
C
DPDT
NO
NC
C
NO
NOTE: The plastic plug (supplied) is to protect the conduit inlet threads and must be removed before wiring the unit.
2.Using a 3/16 in. hex wrench, unscrew the 4
Now proceed to remove the square cover to reveal
3.To wire the unit, refer to the typical wiring drawing (Figure 3) and to the Schematic (shown at right). Wire the LLS Series switch(es) with 60°/75°C (140°/167°F) insulated wire.
4.A terminal (inside the switch enclosure) is provided for case or equipment grounding, refer to Figure 3 for location.
5.After completing wiring, replace the switch cover and make sure it is tightly secured before applying power to the system.
Figure 3
| Customer |
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SPDT | Wiring | DPDT | |
3/4 | |||
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| Conduit Inlet |
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N.O. N.C. COM. | Provision for |
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Case Ground | NC NO C NC NO C | ||
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| Terminal |
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| Block(s) |
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3