Install Instructions

ManualsBrandsMcdonnell & Miller ManualsFlow SwitchesFS7-4WL, 1-1/4" Flow Switch w/ NEMA 4X enclosure, w/extended paddle & paddle arm

Series FS7-4

Industrial Liquid Flow Switch

OPERATION

This control is an independently mounted water flow

sensing device that makes or breaks an electrical

circuit when flow stops or starts.

• Before using product, read and understand instructions.

• Save these instructions for future reference.

• All work must be performed by qualified personnel trained in the proper application,

installation, and maintenance of plumbing, steam and electrical equipment and/or systems in

accordance with all applicable codes and ordinances.

• To prevent electrical shock, turn off the electrical power before making electrical

connections.

• To prevent an electrical fire or equipment damage, electrical wiring insulation must have a

rating of 167˚F (75˚C) if the liquid’s temperature exceeds 180˚F (82˚C).

• To prevent electrocution, when the electrical power is connected to the flow switch, do not

touch the terminals.

• Make sure flow switch electrical cover is secured before turning on electric power.

Failure to follow this warning could cause property damage, personal injury or death.

WARNING

Series FS7-4

Series FS7-4E

(specified models only)

McDonnell & Miller

Installation & Maintenance

Instructions

MM-607(B)

Summary of content (12 pages)

PAGE 1
McDonnell & Miller Installation & Maintenance Instructions MM-607(B) Series FS7-4 Industrial Liquid Flow Switch ® (specified models only) Series FS7-4 OPERATION This control is an independently mounted water flow sensing device that makes or breaks an electrical circuit when flow stops or starts. Series FS7-4E ! WARNING ION CAUT ING WARN • Before using product, read and understand instructions. • Save these instructions for future reference.
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SPECIFICATIONS Maximum Liquid Pressure: 300 psi (21 kg/cm2) (All models except “S”) 1000 psi (70 kg/cm2) (“S” models ) Liquid Temperature Range (TL): 32 - 300˚F (0 - 149˚C) (All models except “W”) -65 - 300˚F (-54 - 149˚C) (“W” models) Ambient Temperature Range (TS): 32 - 120˚F (0 - 49˚C)(All models except “W”) -65 - 300˚F (-54 - 149˚C) (“W” models) Electrical Enclosure Rating: Nema Type 1 (IP 21) (All models except “E” and “W”) Nema Type 4X (IP 56) (“W” models) Nema Type 7 and 9 (“E” models) Maximum Veloci
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FLOW RATES Flow rates required to activate flow switch are shown in chart below. The values are calculated for sensing water (potable, non-polluted) in a horizontal pipe. Settings will vary when used to sense flow of other fluids. Flow Rates Model Mode of Operation Size NPT Flow No Flow in. (mm) Settings gpm (lpm) gpm (lpm) 11⁄4 (32) 4.8 (18.2) 7.7 (29.1) 3 (11.4) 5.9 (22.3) 47 (178) 11⁄2 6.3 (23.8) 10 (37.9) 3.6 (13.6) 7 (26.5) 63 (239) 9.9 (37.5) 15.8 (59.8) 5.9 (22.3) 11 (41.
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INSTALLATION – STEP 1 - Paddle Sizing 1" Pipe size determines the paddle length. Use the chart below to choose the correct paddle size for your installation. 2 3 (25mm) Pipe size in.
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STEP 2 - Determine the Location of the Flow Switch • The flow switch must be located in a horizontal section of pipe where there is a straight horizontal run of at least 5 pipe diameters on each side of the flow switch. • The flow switch must be installed in the upright position as shown with arrow mark on side of casting in the same direction as fluid will flow. 1 1/4" PIPE CONNECTION • Some system conditions that require more than 5 pipe diameters are high viscosity fluid and high fluid velocity.
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STEP 3 - Connecting the Flow Switch to Pipe a. Insert the 8/32 x 1/4” flathead screw through washer and paddle. Attach screw to opposite side of the paddle arm’s curve and tighten to a torque of approximately 12-16 lb•in (1.36-1.81 N•m). b. Apply pipe sealing compound or Teflon® tape to the flow switch pipe threads. NOTE: Do not apply sealant to first threads as this switch is grounded (earthed) via the pipe mounting. c. Insert the flow switch into the pipe tee.
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STEP 4 - Electrical Installation ! WARNING • To prevent electrical shock, turn off the electrical power before making electrical connections. • To prevent an electrical fire or equipment damage, electrical wiring insulation must have a rating of 167˚F (75˚C) if the liquid’s temperature exceeds 180˚F (82˚C). • To prevent electrocution, when the electrical power is connected to the flow switch, do not touch the terminals. • Make sure flow switch electrical cover is secured before turning on electric power.
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b. Electrical Conduit Connection • Connect electric conduit to flow switch electrical enclosure. • Follow accepted electrical practices when installing fittings and making connections. • Refer to and follow local codes and standards when selecting the types of electrical fittings and conduit to connect to flow switch. c. Determine which switch action is required for the flow switch. • “Flow” means that the switch will close circuit C.-N.O. and open circuit C.-N.C.
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d. Based upon the mode of operation (“Flow” or “NoFlow”) required, complete the appropriate steps to connect wires to flow switch. Use a Phillip’s head screwdriver to loosen and tighten switch terminal screws when attaching wires. FS7-4 Illustrated For “Flow” Mode of Operation (Fig. 1) If the flow switch will be used to actuate a signal, alarm or other device when flow occurs, connect the wire from that device to the “N.O.” contact. Connect the “Hot” power supply wire to “C” terminal.
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STEP 6 - Adjustment Adjustment is necessary only if required flow/no flow setpoints are above factory set minimum. a. Unscrew housing cap (A) using a flathead screwdriver. b. Turn the adjusting screw (B) clockwise to increase setpoint. HOUSING CAP “A” ADJUSTING SCREW “B” IMPORTANT: Do not attempt to lower flow switch setpoint from original factory minimum setting. Lowering (turning adjusting screw counterclockwise) the setpoint from original factory setting may cause erratic flow switch operation.
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MAINTENANCE TROUBLESHOOTING SCHEDULE: Problem: • Inspect paddles annually. Turbulent or high flow velocity conditions may require more frequent inspection and/or replacement. 1. Flow Switch Does Not Operate Solution: a. Make sure power has been turned on to device and flow switch. b. Verify that flow rate is high enough for flow switch to activate. Measure flow rate and match with velocities shown in flow rate chart. c. Check to see if paddle moves freely.
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McDonnell & Miller 8200 N. Austin Ave. Morton Grove, IL 60053 tel: 847-966-3700 fax: 847-966-9052 www.mcdonnellmiller.com ©2006 ITT Corporation Printed in U.S.A.