Murphy LLS Installation And Operation Instructions

LLS, LLSB, LLSR, LLSRB Series Models
Lead Line Pressure Switches
Installation and Operation Instructions
Please read the following information before installing. A visual inspection of this product for damage during shipping is recommended before mounting.
It is your responsibility to have a qualified person install the unit and make sure installation conforms to NEC and local codes.
WARNING
BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT
Disconnect all electrical power to the machine.
Make sure the machine cannot operate during installation.
Follow all safety warnings of the machine manufacturer.
Read and follow all installation instructions.
Description
The LLS Series is a pressure switch for applications where viscous liquids
could plug the sensing orifice. LLS and LLSB models have a 2 inch NPT
male connection which attaches directly into the process line. LLSR and
LLSRB models feature a remote sensor connected to the pressure switch by a
length of stainless steel capillary and armor. The snap-acting switch is field
adjustable. The switch is housed in a hard anodized aluminum enclosure.
Optional for LLSR and LLSRB models is a 1 inch NPT x 1 inch NPT (male)
pulsation dampener to minimize damaging pressure pulsation to the switch.

Specifications

Maximum Ambient Temperature: -10° to +160°F (-23° to +71°C).
•
Maximum Process Temperature: -40° to +160°F (-40° to +71°C).
•
Temperature Compensation: The volumetric expansion and contraction of
•
the fill may cause a shift of ±3% to ±5% of the set point.
Switch Enclosure: Aluminum hard anodized (black). NEMA 4, 4x. NEMA 7
•
and 9 explosion-proof, waterproof and corrosion resistant. Suitable for Class I,
Div. 1, Groups A, B, C, D; Class II, Div. 2, Groups E, F, G.
Sensor Model Selection Table
Switch Adjustment Range
Base
psi kPa/MPa
Model
50–450 345 kPa–3.1 MPa
100–1750 689 kPa–12 MPa
LLS
200–2500 13.8 MPa–17.2 MPa
400–4000 2.8 MPa–27.5 MPa
50–450 345 kPa–3.1 MPa
100–1750 689 kPa–12 MPa
LLSB
200–2500 13.8 MPa–17.2 MPa
400–4000 2.8 MPa–27.5 MPa
50–450 345 kPa–3.1 MPa
LLSR
100–1750 689 kPa–12 MPa
200–2500 13.8 MPa–17.2 MPa
50–450 345 kPa–3.1 MPa
100–1750 689 kPa–12 MPa
LLSRB
200–2500 13.8 MPa–17.2 MPa
400–4000 2.8 MPa–27.5 MPa
GENERAL INFORMATION
Sensor Body: LLS: CRS steel chromate plated; 2 in. NPT connection.
•
Diaphragm Materials:
•
Snap-switch Ratings: SPDT (Std.): 15 A @ 125, 250 or 480 VAC
•
Trip Point Adjustment: Field-adjusted with screwdriver.
•
LLSR/LLSRB Mount: 4-hole bolt pattern; 1/4 in. (6 mm) dia. bolts.
•
LLS/LLSB Mount: Direct mount into process (2 in. NPT connection).
•
• Shipping Weight: LLS/LLSB: 4 lbs. 9 oz. (2.25 kg).
• Shipping Dimensions: LLS/LLSB: 10 x 9-1/4 x 5-3/4 in. (254 x 235 x 146 mm).
Dead Band Approximate
psi kPa/MPa
5–45 34 kPa–310 kPa
15–100 103 kPa–689 kPa
20–150 137 kPa–1.03 MPa
75–450 517 kPa–3.1 MPa
5–45 34 kPa–310 kPa
15–100 103 kPa–689 kPa
20–150 137 kPa–1.03 MPa
75–450 517 kPa–3.1 MPa
5–45 34 kPa–310 kPa
15–100 103 kPa–689 kPa
20–100 137 kPa–689 kPa
5–45 34 kPa–310 kPa
15–100 103 kPa–689 kPa
20–150 137 kPa–1.03 MPa
75–450 517 kPa–3.1 MPa
LLSB: Thick wall 304 stainless steel sensor 2 in. NPT process connection.
LLSR: Remote Sensor; Nickel plated steel, stainless steel capillary.
LLSRB: Remote Sensor; 316 stainless steel housing and capillary.
LLS/LLSB: Ni-SPAN ® . LLSR/LLSRB: 316L S. Steel–Teflon* coated.
SPDT (Gold): 100 mA @ 125 VAC; 0.250 A @ 6 VDC
DPDT (Std.): 11 A @ 125 or 250 VAC
DPDT (Gold): 100 mA @ 125 VAC; 0.250 A @ 6 VDC
LLSR/LLSRB: 7 lbs. 12 oz. (3.23 kg).
LLSR/LLSRB: 15-3/4 x 11 x 5-1/4 in. (400 x 279 x 133 mm).
Max System
Wetted Parts Materials
psi MPa
1500 10.3
CRS steel sensor –chromate plated (yellow)
2500 17.2
Ni-SPAN
3000 20.6
5000 34.4
1500 10.3
Thick wall 304 stainless steel sensor housing;
2500 17.2
Ni-SPAN
3000 20.6
standard for direct exposure to H
5000 34.4
1500 10.3
Remote sensor–Nickel plated steel w/ stainless
2500 17.2
steel capillary; Teflon* coated diaphragm.
3000 20.6
1500 10.3
Remote sensor–AISI 316 stainless steel housing;
2500 17.2
stainless steel capillary and armor; AISI 316L
5000 34.4
stainless steel Teflon* coated diaphragm.
5000 34.4
LLS-93096N
Effective 03-94
Section 05
FRANK W.
LLS Series Pressure Switch
® diaphragm.
® diaphragm. Meets NACE MR-01-75
S.
2
* Teflon–DuPont Trademark
®
MFR.
1