Giacomini K500 User manual

1
0454EN October 2013
Boiler room components
Flow switch K500
ISO
14001
0032A/2
OHSAS
18001
0064L/0
ISO
9001
0006/7
Installation
The number of blades to be used depends on the pipe diameter (D) and the
intervention capacity.
Description
The ow switch K500 is used to control the ow in the pipes of the heating
and/or conditioning system. The ow switch is tted as standard with three
blades for use in pipes from DN25 to DN80, plus a fourth blade for pipes with
a diameter of (or greater than) DN100. The device is designed in such a way as
to ensure hermetic separation of the mechanical part from the electric part.
The electric head can be removed and replaced.
Operation
When inserted in the pipe, the blade movement is proportional to the ow
that strikes it; the movement is mechanically transmitted to a microswitch
that activates or deactivates an electric contact (gure 2). The sensitivity of
the ow switch can be adjusted via the setting screw (gure 1). A particular
feature of the device is its low load loss.
Main characteristics
• For use in pipes DN25÷200
• Body in nickel-plated brass
• Blades in steel
• Protection blower in NBR
• Spring in steel
• SPDT microswitch
• Contact capacity 250 V - 5 A
• Electric connection by means of DIN 43650A connector
• Protection degree IP65
• Weight 350 g
Technical data
• Max. uid temperature: 110 °C
• Max. working pressure: 25 bar
• Average loss of pressure: 0,15 bar (at maximum capacity)
• Precision: ±15%
DN
[mm]
Maximum capacity
[m3/h]
Intervention capacity
Setting range (*)
[m3/h]
Blade no.
25 3,6 0,9 ÷ 1 1
32 6 2,3 ÷ 2,7 1
40 9 2,8 ÷ 3,4 1
50 15
6,5 ÷ 7,5 1
1,9 ÷ 2,4 1+2
65 24
11,4 ÷ 13,3 1
4,8 ÷ 5,7 1+2
80 36
16,5 ÷ 18,9 1
7,6 ÷ 8,9 1+2
2,7 ÷ 3,5 1+2+3
100 60
26,3 ÷ 30,3 1
13,3 ÷ 15,3 1+2
6,7 ÷ 8,4 1+2+3
5,4 ÷ 6,7 1+2+3+4
150 120
31 ÷ 40 1+2+3
8,6 ÷ 15 1+2+3+4
200 240
55 ÷ 71 1+2+3
16 ÷ 27 1+2+3+4
Table 1 - Number of blades to use
(*) These data refer to horizontal assembly and decreasing ow with uid = water
5
2
1
2
3
30D
D
Figure 1 - Geometry of the ow switch / pipe coupling.
K500
Note.
The setting can be modied, as shown in gure 2.
Warning.
Check the blade does not touch the bottom of the pipe.
If necessary, cut the blade (refer to gure 1)

2
0454EN October 2013
Boiler room components
Flow switch K500
ISO
14001
0032A/2
OHSAS
18001
0064L/0
ISO
9001
0006/7
Dimensions
Product specications
K500
Flow switch for pipes with DN25÷200, with nickel-plated brass body; blade,
blade support and spring made of steel. Magnet in Oxid 300. Precision ±15%.
SPDT microswitch 250 V-5°. Hermetic separation between mechanical part
and electric part. The electric head can be removed and replaced. Protection
degree IP65. Max. uid temperature 110 °C. Max. working pressure 25 bar.
Average loss of pressure 0,15 bar (at maximum capacity).
Wiring and setting
For the wiring, refer to gure 3. To regulate the intervention capacity (within
the temperature range shown in table 1), raise the safety cover on the electric
head of the tool, and turn the setting screw clockwise (gure 2).
30
30
80
83,5
51,5
28,5
104
162,5 91,5
1
2
3
1” - GC
29
Figure 3 - Dimensions in mm
1
2C
NA
NC
3
Figure 3 - Electrical connection
Additional information
For further information, visit the website www.giacomini.com or contact the technical service: '[phone]+39 0322 923255 *[email protected]
This information is intended as an example. Giacomini S.p.A. reserves the right to modify the contents - at any time and without prior warning - for technical or commercial reasons. The
information in this technical sheet does not exempt the user from scrupulously observing the existing regulations and standards relating to good technical practices. Giacomini S.p.A. Via per
Alzo, 39 - 28017 San Maurizio d’Opaglio (NO) Italy
Figure 2 - Regulating the setting screw
Setting screw
adjust
open
adjust
open

1
0454EN July 2015
Boiler room components
Flow switch K500
ISO
14001
0032A/3
OHSAS
18001
0064L/1
ISO
9001
0006/7
Description
The ow switch K500 is used to control the ow in the pipes of the heating
and/or conditioning system.
The ow switch is equipped with four blades for use in pipes from 1" (DN25)
to 8” (DN200). The device is designed in such a way as to ensure hermetic
separation of the mechanical part from the electric part.
Versions and product codes
Product code Size No. of blades included
K500Y002 1” ÷ 8” (DN25 ÷ DN200)
1 blade of 35 mm
1 blade of 58 mm
1 blade of 89 mm
1 blade of 167 mm
Technical data
• Operating temperature range: -20÷110 °C
• Maximum ambient temperature: 50 °C
• Max. working pressure: 10 bar
• Fixing with G 1”threaded tting
• Blades for pipes from 1”to 8”(from DN25 to DN200)
• Protection degree: IP65
• Measured ow rate: see the table in the paragraph“installation”
Materials
• Casing: shockproof thermoplastic material
• Body: brass
• Blades: stainless steel AISI 301
Electrical data
• SPDT dust-tight microswitch with approvals UL, cUL, CSA, ENEC.
• Rated insulation voltage: 380 V~
• Rated use voltage: 220÷250 V~
• Rated current for continuous service: 10 A
• Resistive load: 16 A
• Inductive load: 6 A
• Continuous current: 0,2 A
• Increasing ow rate:
Open contact C - NC
Close contact C - NO
Operation
When inserted in the pipe, the blade movement is proportional to the ow
that strikes it; the movement is mechanically transmitted to a microswitch
that activates or deactivates an electric contact.
The sensitivity of the ow switch can be adjusted via the setting screw.
A particular feature of the device is its low load loss.
Setting
The ow switch is calibrated at the factory for intervention at
the minimum ow rate. Turn the adjustment screw clockwise
to increase the ow rate value at which the intervention occurs.
Warning.
If you need to turn the screw anti-clockwise to decrease the ow rate,
check that the spring is not too unloaded, as this will aect the reset
of the device.
Installation
The ow switch is installed on horizontal pipe sections, away from sources of
disturbance or turbulence, such as valves, elbows, etc ... (minimum distance
from said devices is equal to 5 times the diameter of the pipe).
For correct operation, respect the maximum distance between the bottom of
the appliance and the surface of the pipe (~ 48 mm) (Fig.1).
Once the flow switch has been installed, check the correct operation by
pressing on the flow adjustment screw to simulate the flow (Figure 2).
Fig.1 Fig.2
Max. 48 mm
Flow adjustment
screw
Warning.
The 35 mm blade could interfere with the internal diameter of some
1" ttings. If this occurs simply cut the blade to reduce the length.
The table indicates the ow rate values at which the intervention and recovery
occur, the diameters of the corresponding pipes and the blade to use.
If necessary shape the prole of the blades.
Ø piping Blade length
[mm]
MIN Flow rate
[m3/h] with ow in:
MAX ow rate
[m3/h] with ow in:
reduction increase reduction increase
1” (DN25)
35
0,5 1 1,9 2
1 1/4” (DN32) 0,7 1,2 2,7 2,9
1 1/2” (DN40)
58
1 1,6 3,6 3,9
2” (DN50) 2,1 2,9 5,7 6,1
2 1/2” (DN65)
89
2,7 4 6,5 7
3” (DN80) 4,3 6,1 10,7 11,4
4” (DN100)
11,3 14,7 27,6 28,9
167 * 6,1 7,9 17,3 18,4
5” (DN125)
89 22,8 28,3 53 55,5
167 * 9,2 12,8 25 26,7
6” (DN150)
89 35,8 43 81,6 85
167 * 12,2 16,8 30,5 32,5
8” (DN200)
89 72,4 85 165,5 172,3
167 * 38,5 46,4 90,7 94
* These values are obtained by adding the longer blade
K500

2
0454EN July 2015
Boiler room components
Flow switch K500
ISO
14001
0032A/3
OHSAS
18001
0064L/1
ISO
9001
0006/7
Dimensions
B
A
G F
CD
E
H
I
L
M
A
mm]
B
mm]
C
mm]
D
mm]
E
mm]
F
mm]
G
mm]
H
mm]
I
mm]
L
[mm]
M
mm]
132 66 110 65 ch. 38 25 28 35 58 89 167
Product specications
K500
Flow switch to control the ow in the pipes of the heating and/or conditioning
system. The ow switch is equipped with four blades for use in pipes from 1"
(DN25) to 8” (DN200). Operating temperature range: -20÷ 110 °C. Maximum
ambient temperature: 50 °C. Max. working pressure: 10 bar. Fixing with G 1”
threaded tting. Protection degree: IP65.
Additional information
For additional information please check the website: www.giacomini.com or contact the technical service: '[phone]+39 0322 923255 *[email protected]
This information is intended as an example. Giacomini S.p.A. retains the right to make modications for technical or commercial reasons, without prior notice, to the items described in
this pamphlet. The information described in this technical pamphlet does not exempt the user from following carefully the existing regulations and norms on good workmanship.
Giacomini S.p.A. Via per Alzo, 39 - 28017 San Maurizio d’Opaglio (NO) Italy