Install Instructions

ManualsBrandsMcdonnell & Miller ManualsHeating SuppliesFS8-W 1" SPDT Liquid Flow Switch (NEMA-4X)

Series FS8-W

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.

ARNING

CAUTION

WARNING

Series FS8-W

Now

with

Stainless Steel

Paddles

McDonnell & Miller

Installation & Maintenance

Instructions

MM-600(G)

Summary of content (8 pages)

PAGE 1
McDonnell & Miller Installation & Maintenance Instructions MM-600(G) Series FS8-W General Purpose Liquid Flow Switch Now with Stainless Steel Paddles OPERATION This control is an independently mounted water flow sensing device that makes or breaks an electrical circuit when flow stops or starts. Series FS8-W ! WARNING ION CAUT ING WARN • Before using product, read and understand instructions. • Save these instructions for future reference.
PAGE 2
SPECIFICATIONS Maximum Liquid Pressure: 160 psi (11.3 kg/cm2) Liquid Temperature Range (TL): 32 - 225˚F (0 - 107˚C) Ambient Temperature Range (TS): 32 - 120˚F (0 - 49˚C) Electrical Enclosure Rating: Nema Type 4X (IP 56) Maximum Velocity: 10ft/sec (3M/sec) Pipe Connection Thread Size: - 1" NPT - All models except “J” - 1" BSPT - “J” models ELECTRICAL RATINGS Voltage 120 VAC 240 VAC Motor Switch Rating (Amperes) Full Load Locked Rotor 7.4 44.4 3.7 22.
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. Mode of Operation Pipe Size NPT Flow Velocity No Flow Velocity in. (mm) Settings gpm (lpm) fps (mps) gpm (lpm) fps (mps) Settings will vary when used to sense flow of other fluids or if located in a vertical pipe. Max. Flow Rate gpm (lpm) w/o Paddle Damage 1 (25) Factory or Minimum 4.9 (18.5) 1.82 (.55) 3.4 (12.9) 1.25 (.
PAGE 4
STEP 1 - Paddle Sizing Determine the correct paddle length for your installation from the chart below. Pipe Size in. 1 1 1/4 1 1/2 2 2 1/2 3 4 6 8+ (mm) (25) (32) (40) (50) (65) (80) (100) (150) (200+) Paddle (Standard Length) in. (mm) 1 (25) 2 (25) 2 (51) 2 (51) 3 (76) 3 (76) 6 (152) 6 (152) 6 (152) Trim to Length in. 1" (25mm) (mm) N/A 1 1 1 2 2 3 5 1/4 1/2 5/8 1/4 5/8 5/8 5/8 2" (51mm) (32) (38) (41) (57) (67) (92) (143) 3" (76mm) 6" (152mm) N/A NOTE: All models include 4 paddles as shown.
PAGE 5
STEP 2 - Determine the Location of the Flow Switch • The flow switch should 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 may be installed in a vertical pipe if the flow is in the upward direction. 1" PIPE CONNECTION • 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.
PAGE 6
b. Apply pipe sealing compound or Teflon® tape to the flow switch pipe threads. Teflon® 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. Turn the flow switch two (2) or three (3) revolutions clockwise until tight. Do not put excessive force on cover when turning. d. Place a 1 3/8" open end wrench on flow switch body to tighten to final position.
PAGE 7
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.
PAGE 8
McDonnell & Miller STEP 6 - Adjustment Adjustment is necessary only if required flow/no flow setpoints are above factory set minimum. a. Turn off power. Remove electric enclosure cover. b. Turn the adjusting screw clockwise to increase setpoint. 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. c.