Install Instructions

ManualsBrandsMcdonnell & Miller ManualsFlow SwitchesFS5-S-1, 1" Flow Switch w/ Stainless Steel body

Installation & Maintenance

Instructions MM-616

Series FS-5

General Purpose

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 FS-5

(specified models only)

Summary of content (8 pages)

PAGE 1
Installation & Maintenance Instructions MM-616 Series FS-5 General Purpose Liquid Flow Switch ® (specified models only) Series FS-5 OPERATION This control is an independently mounted water flow sensing device that makes or breaks an electrical circuit when flow stops or starts. ! WARNING CAUT WARN ING ION • Before using product, read and understand instructions. • Save these instructions for future reference.
PAGE 2
SPECIFICATIONS Maximum Liquid Pressure: 150 psi (10.
PAGE 3
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 Pipe Size NPT in. (mm) Settings 3 ⁄4 (20) Factory or or 1 (25) Minimum Maximum Mode of Operation Flow No Flow gpm (lpm) gpm (lpm) 1.5 (5.7) 15 (56.8) 1.1 (4.2) 10 (37.9) Max.
PAGE 4
SECTION 2 - Connecting the Flow Switch to Pipe a. Apply pipe sealing compound or Teflon® tape to the pipe threads. NOTE: Do not apply sealant to first threads as this switch is grounded (earthed) via the pipe mounting. b. Insert pipe threads into flow switch and turn 2 or 3 times until tight. • Place one pipe wrench on hex fitting of flow switch and one wrench on connecting piping. Tighten to following torque values.
PAGE 5
STEP 3 - 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.
PAGE 6
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. when flow rate is increased above setpoint of flow switch. • “No Flow” means that the switch will open circuit C.-N.O. and close circuit C.-N.C. when flow rate is decreased below setpoint of flow switch. d. Based upon the mode of operation (“Flow” or “NoFlow”) required, complete the appropriate steps to connect wires to flow switch.
PAGE 7
STEP 4 - Testing a. Place cover on flow switch and turn on power. Initiate fluid flow through the system. Observe the device being activated by the flow switch to determine if device is operating as required. b. Turn off fluid flow to determine if device is operating as required. ON OFF c. Repeat initiating and turning off fluid flow several times to test flow switch and device for proper operation. - If operating as required, put system into service.
PAGE 8
MAINTENANCE TROUBLESHOOTING SCHEDULE: Problem: • Inspect 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 plunger moves freely. Some system piping disassembly may be required.