Danfoss FQS Installation guide

Approved by

drawn by

Installation and Instruction

A.Failure to read and follow all instruction carefully before installing or operating this flow switch could cause personal injury and/or

property damage. Save these instructions for future use.

B.NOTE FOR SAFETY

Warning

Never remove the cover when power is applied. This can result in electric shock.

Connect wiring after turning off power. This can result in electric shock.

Do not sprinkle water over the microswitch. This can result in electric shock.

Do not connect a load exceeding the electric rating. This can result in bad contacts.

Do not turn screws other than the operating value setting screw. Incorrect operations or water leakage can occur.

Install the switch so that the arrow indication and the fluid flow match. The switch does not work if fluid flows in the opposite direction.

In addition, paddles can be damaged.

Use fluid that does not corrode the liquid contacting material. In addition, use fluid in liquid form. Gas or liquid mixed with gas causes unstable operations.

Connect the switch to ground. Do not connect the grounding wire to a gas pipe, water pipe, lightning rod or the grounding wire of a telephone line.

If the grounding is not appropriate, this can result in electric shock.

Use fluid with flow velocity of 2m/s or less. In addition, avoid strong pulsating fluid and vibration. Paddle can be damaged.

C. DESCRIPTION

Type FQS Flow Switch with SPDT micro switch detects the fluid flow in pipe line.

The electric contact block is completely sealed from the fluid in the pipe line by a bellows. When a flow rate increases,the actuating plate will move while the resistant force ordering.

D. SPECIFICATIONS

Structure

Liquid contacting material

Maximum operating pressureAllowable fluid temperatureEndurance operationsMounting screw

Ambient temperatureAmbient humidity

Contact structure

Electrical ratings

Open

Copper alloy

or stainless paddle option 0.98 MPa

5 to 80

100,000 operations R1(MPT) or NPT(option) -25 to +80

80 %RH or less

(No freezing, no condensation) Single-pole double-throw

Unit: A

Flow rate increase

A:Normally open terminal

B:Normally closed terminal B C: Common terminal

Type name,	Voltage		Resistive	Lamp	Motor
symbol			load	load	load
	125V	AC	15	1.5	5
Standard	250V	AC	15	1.25	3
G	30V	DC	6	1.5	5
	125V	DC	0.5	0.5	0.05
DC high load type	125V	DC	10	1.5	5
D	250V	DC	3	1.5	2

Type name,	Voltage		Minimum	Maximum
symbol	Voltage		applicable load	current load
Small load type	24V	DC	0.01	0.1
K	100V	AC	0.01	0.1

date	Name	Catalog Number	Drawing Number	1/2
1991
	PADDLE TYPE FLOW SWITCH	FQS	A-QS-90003-A
APR.

4	3	2	1	Terminal

MARK

Screwed in depth

FLOW

Paddle 1
Paddle 2	№	Parts Name	Q'ty.
Paddle 2	1	Label	1
	1	Label	1
Paddle 3	2	Insulated Plate	1
Paddle 3	3	Micro Switch	1
	3	Micro Switch	1
	4	Adjusting Screw	1
	5	Metal Fitting For	1
	5	Flow Adjusting Screw	1
		Flow Adjusting Screw
	6	Flow Adjusting Screw	1
	7	Actuating Plate	1
	8	Adjusting Spring	1

PLRCA.PI.GK0.A1.02 / 520H3006

Approved by	drawn by	date	Name	Catalog Number	Drawing Number	2/2
						2/2

Installation and Instruction

1991

PADDLE TYPE FLOW SWITCH

FQS

A-QS-90003-A

APR.

D.INSTALLATION METHOD

This table is based on the operating point for decreasing flow.

Provide a straight pipe section of more than 5 times the piping diameter in front and

Decreasing flow setting value means the flow switch operates when the flow rate decreases.

back of the flow switch. This is used to prevent hunting due to turbulent flow.

Increasing flow setting value means the flow switch operates when the flow rate increases.

Basically install the switch in horizontal piping with the cover facing upward but it

Differential value (difference between the decreasing flow operating value and the

can be installed in vertical piping.

increasing flow operating value) is not determined specifically. The guideline value

However,in the case of a vertical pipe installation, the operating value may change

is as follows:

about 20% compared to the horizontal pipe installation.

Rc1

Less than 50L/min:

About 10L/min

For piping of the flow switch, use a commercially available

Piping

From 50L/min to less than 100L/min:

About 15L/min

Tee joint (conforming to JIS B 2301).

100L/min or more:

About 20% of the setting value

If the available Tee joint cannot be installed, adjust the

This table is based on the condition when the depth screwed in is kept within 12±1.2mm.

dimension “a” in the diagram on the right to that of the

Tee joint of JIS.

Paddle size is in the following order: 1<2<3

When installing the flow switch to piping, the depth of the

flow switch screwed in shall be 12±1.2mm.

When the setting value is not specified, the attached paddle 1 can be used for 40A

For wiring,follow the instructions written on the insulation plate of the microswitch.

or less, 1+2 for 65A or less and 1+2+3 for 80A or more.

E.OPERATING VALUE SETTING

When more than two paddles is attached, you can change the flow rate adjustment range

When the operating value is not specified, the flow switch is shipped with the

by removing the paddles one by one in order of the longer paddle first.

operating value set around the minimum flow rate.

To install the paddles, install the paddle 1 first then stack the paddle 2 and then

When you turn the flow adjusting screw clockwise, the operating point goes up.

the paddle 3.

When you turn it counterclockwise, the operating point goes down.

G.OPERATION CHECK

But if you turn the screw counterclockwise too much, the operation becomes unstable

Install and calibrate the Product correctly and then check its operation to confirm

and if you turn it further, the setting screw breaks off.

correct function of the whole system when using.

If you have changed the setting value, make sure to operate the paddles and check

H.LIMIT ON APPLICATION

the operation of the microswitch.

The product is not designed nor manufactured for an use in such equipment or system

Never remove the metal fitting because this is used to prevent the flow adjusting

that is intended to be used under such circumstances that may affect human life.

screw from loosening.

For application requiring extreme high reliability, please contact the Company first.

The adjusting screw is exclusively used by our service personnel.

I.SCOPE OF WARRANTY

Do not use this screw for adjustment.

Unless otherwise agreed by the parties, warranty period of the Product shall be one

When setting the operating value, refer to either decreasing flow setting value or

year after date of delivery to Buyer.

increasing flow setting value.

In case of failure attributable to the Company within such period, the Product shall

F.OPERATION ADJUSTMENT RANGE TABLE

Unit:

L/min

be repaired or replaced without charge, provided that any one of followings are out

Piping

Paddle

Adjustment range

flow velocity

of the warranty :

combination

MIN

MAX

of 2m/s

Improper handling or application by user.

25A

(1B)

Modification or repair by other than the Company.

32A (1 1/4 B)

100

120

Any failure to be caused by acts of God, fire, storm or the like, war, riot

40A (1 1/2 B)

135

163

or the like and other causes beyond the control of the Company.

1+2

150

50A

(2B)

264

Warranty described in this paragraph means the warranty for the Product itself and

151

220

does not include warranty for any consequential damage arising out of or occasioned

65A (2 1/2 B)

1+2

105

355

432

by a defect or failure of the Product.

356

360

1+2+3

100

225

80A

(3B)

1+2

226

480

612

481

510

1+2+3

200

385

100A

(4B)

1+2

386

820

1044

821

870

1+2+3

350

594

125A

(5B)

1+2

595

1265

1613

1266

1342

1+2+3

530

836

150A

(6B)

1+2

837

1780

2268

1781

1890

FEB.12.2004 REVISION

K.Suzuki

PLRCA.PI.GK0.A1.02 / 520H3006