ICMA P329 Owner's manual

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
ICMA S.p.a. - Heating Technologies - www.icmaspa.it FI.P329.EN.C - 1 /2022
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected]
1
INSTALLATION AND OPERATION INSTRUCTIONS
These instructions include information necessary to assemble and use the product correctly.
Besides respecting the general safety regulations, it is necessary to observe all points specically and specially marked.

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
ICMA S.p.a. - Heating Technologies - www.icmaspa.it FI.P329.EN.C - 1 /2022
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected]
2
INDEX
1. CINDICATION OF INSTRUCTIONS..........................................................................................................................................3
2. IMPORTANT SAFETY AND INSTALLATION INSTRUCTIONS............................................................................................4
3. FIELD OF APPLICATION...........................................................................................................................................................6
3.1 Types of system........................................................................................................................................................................6
3.2 Pumped liquids........................................................................................................................................................................6
4. INSTALLATION AT SITE............................................................................................................................................................8
4.1 Installation...............................................................................................................................................................................8
4.2 Permissible installation positions....................................................................................................................................9
4.3 Motor housing positions...................................................................................................................................................9
5. ELECTRIC CONNECTION.........................................................................................................................................................10
6. COMMISSIONING................................................................................................................................................................11
6.1 Start-up of the circulator..................................................................................................................................................11
6.2 Operating elements.............................................................................................................................................................12
6.3 Mode of operation..............................................................................................................................................................12
6.4 Automatic detection of the presence of air - Vent system...............................................................................13
7. CIRCULATOR SETTING............................................................................................................................................................14
8. PERFORMANCE CURVES........................................................................................................................................................14
9. MAINTENANCE.......................................................................................................................................................................15
10. FAULTS, CAUSES AND REMEDIES........................................................................................................................................15
10.1 Fault nding table............................................................................................................................................................15
10.2 Unlocking procedure........................................................................................................................................................16

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
ICMA S.p.a. - Heating Technologies - www.icmaspa.it FI.P329.EN.C - 1 /2022
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected] Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected]
2 3
1. INDICATION OF INSTRUCTIONS
This manual contains information and prescriptions marked by the following symbols.
This instruction sheet contains following warning symbols.
The inobservance of the safety provisions marked by the symbol “CAUTION”:
hazard” may endanger the safety of people.
The inobservance of the safety provisions marked by the symbol “CAUTION”:
electricity” may endanger the safety of people, as well as the integrity of
things.
The inobservance of the safety provisions marked by the word “CAUTION”
may endanger the integrity and functionality of the equipment and of the
machines.
The circulators are not to be used to transfer ammable liquids such as
gasoline, oils, gas oil or similar liquids.
The circulators are not to be used to transfer aggressive liquids, such as acids
and sea water.
CAUTION
The removal of the screws can cause the output of hot uids under high pressure
from heating system. Drain the system or close the isolating valves.
CAUTION
High temperature surface. Pay utmost care to prevent people from getting in
contact with the hot surfaces of the circulator.
CAUTION

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
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2. IMPORTANT SAFETY AND INSTALLATION INSTRUCTIONS
Prior to installation, read these installation and operating instructions. The installation and operation should also be in
accordance with national regulations and accepted codes of good practice.
This appliance can be used by children aged from 8 years and above and
persons with reduced physical, sensory or mental capabilities or lack of experience
and knowledge, only if they have been given supervision or instruction
concerning use of the appliance in a safe way and understand the hazards
involved. Children shall not play with the appliance. Cleaning and user maintenance
shall not be made by children without supervision.
To guard against injury, basic safety precautions should be observed, including
the following:
1. Read and follow all safety instructions and all the important notices on the
appliance before installing, using and maintaining the circulator. failure to do so
may cause personal injury or damage to the circulator or installation.
2. Always disconnect electrical supply before putting on or taking o parts
and whilst the equipment is being installed, maintained or handled. Never
work with bare feet and/or with wet hands.
3. To avoid possible electric shock, special care should be taken since
water is used with electrical equipment. Carefully examine the circulator
before and after installation. Do not operate the circulator if it has a damaged
supply cord or enclosure, or if it is malfunctioning or it is dropped or damaged
in any manner. Inspect the circulator periodically. The circulator should not be
electrically supplied if there is water on parts not intended to be wet.
4. Risk of scalding.
To avoid injury before any servicing operation wait until the water has cooled
inside the circulator.
Do not touch the uid or the circulator when temperature is higher than 60°C.

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
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5. Improper use
This is a circulator to be used in heating plants and for the circulation of clean
water without abrasive particles. This is not a submersible pump. Do not use
this circulator:
• With liquids other than water (e.g. ammable liquids, etc.) (EN60335-2-51);
• For handling drinkable water or food related liquids;
• For the circulation of domestic water;
• In locations where special condition prevail, such as the presence of a corrosive
or explosive atmosphere (dust, vapor or gas) (EN60335-2-51);
• For other than intended use.
Never run the circulator dry. The circulator must be always fully lled with
water when operating.
6. Installation
The circulator must be mounted in a stable/xed position in a dry, well
ventilated, frost-free, waterproof and protected place, with sucient ventilation
around it. Assemble the circulator only after having ended all welding and
brazing works on the hosing. Before installing the circulator, make sure that
the internal part of the tubes is clean. Install the circulator in an accessible
place for future checks and disassembly procedures. Foresee enough space
for inspections and disassembling.
To avoid circulator overheating, do not place any object on the circulator itself.
7. Electric connection
IMPORTANT: Connection to the power supply must be eected by means of
a xed power cable which is tted with a plug-type connection or an all-pole
isolating switch with a minimum contact opening of 3 mm.
Electrical connection must be carried out only by a qualied electrician and in
accordance with local regulations and both data on the name-plate and the
appropriate diagram inside the terminal box cover.
Follow all safety standards.
Do not connect to mains supply unless circulator is fully and correctly
assembled.
8. Supply cord must be selected following the requirements of EN60335-2-51
Chapter 25. Supply cord must be protected against any kind of mechanical
damage (cuts, abrasion, etc.). It must not touch the pipe or the pump. (EN
60335-2-51). If the insulation of the Supply cord can come in contact with
parts having a temperature exceeding 70°C the supply cord insulation must
be protected, for example, by insulating sleeving having an appropriate
temperature rating. (EN60335-2-51).
9. Connect circulators only to a mains supply protected by a Residual Current
Device (RCD or Ground-Fault Circuit-Interrupter) with a rated residual operating
current not exceeding 30mA.

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
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10. Any modication to the equipment must be prior agreed upon with and
authorized
by the manufacturer. Original spare parts and accessories authorized
by the manufacturer are integral part contributing to the safety of the equipment
and of the machines. The use of not original components or accessories
may endanger the safety and causes the termination of the warranty. A safe
operation is assured only for the applications and conditions described in →3
Field of application of this manual. Non-observance of the safety instructions
results in the loss of any claims to damages.
Non-observance of the safety instructions results in the loss of any claims to
damages.
The indicated limit values are binding and cannot be exceeded for any reason
whatsoever.
3. FIELD OF APPLICATION
3.2 Pumped liquids
3.1 Types of system
Circulation of water/liquids in hot water heating systems and in renewable
energy solar thermal systems:
• One-pipe systems
• Two-pipe systems
• Systems with constant or variable ows
• Underoor heating systems
• Boiler or primary circuit
• Storage tank circuit
Clean liquids, not aggressive and not explosive, not containing solid particles, bers or mineral oils.
In heating systems:
• Water for heating according to VDI 2035;
• Mixtures of water and glycol with glycol percentages not greater than 30%.
In domestic hot water circulation systems, max. 38°d water hardness.
Any other use is regarded as incorrect use. For the use with other uids, manufacturer’s authorization is
required.
Keep these instructions for future reference.
• The circulators are not to be used to transfer ammable liquids such as gasoline, oils, gas oil
or similar liquids.
• The circulators must never be used in refrigeration systems, air conditioning systems and
similar installations.

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
ICMA S.p.a. - Heating Technologies - www.icmaspa.it FI.P329.EN.C - 1 /2022
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Ambient temperature Liquid temperature
[°C] Min. [°C] Max. [°C]
0 2 95
10 10 95
20 20 95
30 30 95
35 35 90
40 40 70
To avoid condensation in the motor and the electronics the temperature of the pumped liquid must always be
greater than the ambient temperature.

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
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Installation and service by qualied personnel only!
Avoid the installation in misaligned pipe work.
The circulator must be mounted in a stable/xed position in a dry, well ventilated, frost-free, waterproof and protected
place, with sucient ventilation around it.
Assemble the circulator only after having ended all welding and brazing works on the hosing.
Before installing the circulator, make sure that the internal part of the tubes is clean.
Install the circulator in an accessible place for future checks and disassembly procedures.
Foresee enough space for inspections and disassembling.
Foresee isolating valves at intake and output (before and after the circulator) to allow the disassembly without emptying
the plant.
The assembly of the interception organs must be carried out in such a way as to prevent possible water leaks from
involving the terminal board.
Perform the assembly without mechanical stresses acting on the circulator.
4. INSTALLATION AT SITE
4.1 Installation
The direction of the water ow is indicated by the arrow on the pump housing, as shown in Fig. 4.1.
1. Check that both isolating valves are closed
2. Install the circulator with the motor shaft in horizontal position. Connect the piping without
3. Accurately insert the two gaskets supplied.
4. Establish a screwed connection between circulator and piping.
5. Tighten the screwed connection hand with an assembly tool (e.g. pipe wrench).
Fig. 4.1
Thread Pump housing material Tightening torque
G1 Ghisa EN-GJL-200 Max. 85 Nm

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
ICMA S.p.a. - Heating Technologies - www.icmaspa.it FI.P329.EN.C - 1 /2022
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Install the circulator with horizontal motor shaft axis (Fig. 4.2).
4.2 Permissible installation positions
4.3 Motor housing positions
Fig. 4.2
Fig. 4.3
The motor body can be rotated in the positions shown in Fig. 4.3.
Pay utmost care to prevent people from getting in contact with the hot
surfaces of the circulator.
Drain the system or close the isolating valves on either side of the pump before
the screws are removed. The pumped liquid may be scalding hot and under
high pressure.
Procedure (Fig. 4.4):
1.Slacken and remove the four screws M5 holding the motor.
2.Turn the motor to the desired position without extracting it from the pump housing.
3.Insert and tighten the pump housing screws (The tightening torque of the screws of the pump housing must
correspond to a value of 3.3 ± 0.5 Nm).
Pay attention not to damage the seal of the pump housing.
Fig. 4.4
CAUTION

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
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The electric connection has to be performed by a qualied electrician in
compliance with the national regulations. Follow the safety regulations and
installation regulations of your country.
Connection to the power supply must be carried out in compliance with the
standards via a xed power cable which is tted with a plug-type connection or
an all-pole isolating switch with a minimum contact opening of 3 mm.
The circulator belongs to class II and therefore grounding is not necessary. The circulator does not require any external
protection of the motor. Compare the frequency and the voltage of the mains with the rating data. All electric
information concerning the A1:G413 is on the signaling plate. The connection cord must be laid in such a way as it
cannot come in contact with the hosing or the motor body. In case of use of the circulator with uids at a temperature
higher than 70 °C, use a connection cord resistant to high temperatures.
5. ELECTRIC CONNECTION
Fig. 5.1
1. Connect the power supply conductors to the terminals according to the diagram given in Fig. 5.1, from A to C. When
using three-pole cables, remove the end of the grounding cable.
2. Insert the terminal board in the proper seat, connecting the blue wire (neutral) with letter N and the black/brown
wire (phase) with letter L. (Fig. 5.1.D).
3. Screw the two screws (Fig. 5.1.E - The tightening torque of the screws must correspond to a maximum value of 0,3
Nm).
4. Tighten the sealing nuts to the fairlead (Fig. 5.1.F - The tightening torque must correspond to a maximum value of
2 Nm).
5. The LED light, if lighted, indicates that the power supply is present. (Fig. 5.1.G).

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
ICMA S.p.a. - Heating Technologies - www.icmaspa.it FI.P329.EN.C - 1 /2022
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For cables with outer diameter of the sheath between 7 mm and 8.5 mm: remove the rubber retainer from the cable
gland. In this case, the circulator can only be installed with the cable gland down.
Activation frequency: activations/deactivations through the mains voltage ≤ 20/24 h.
min. Ø 7.0 mm
max. Ø 8.5 mm
6. COMMISSIONING
6.1 Start-up of the circulator
Absolutely avoid dry operation. Start the circulator only after having
completely lled the plant.
Circulators with permanent magnets can not be driven in speed by means
of phase control of the supply voltage.
Circulators driven by an electronic frequency converter have a current
peak at each activation (inrush current) greater than traditional
circulators (asynchronous).
The activation stage of the circulator has to be size taking into account
this current peak. For further details contact the manufacturer.
CAUTION
CAUTION
CAUTION

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
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A LED provides information about the operation status of the circulator.
Selector
All settings are made using the selector on the housing front.
The selector can be adjusted in a continuous way with a rotation angle
of 270 °.
The arrow on the selector indicates the operating mode chosen.
LED light
The LED light on the front advises the commissioning/fault of the
circulator.
Every operating mode is characterized by a xed light of dierent
colour.
After a change of operating mode, the LED pulses 5 times. The pulse
will be a change of brightness intensity of the LED light.
6.2 Operating elements
6.3 Mode of operation
Fig. 6.1 Selector and LED light
LED COLOR DESCRIPTION
Green
P mode (Δp-v) – Proportional dierential pressure
The circulator head is proportionally reduced with decreasing of the
heat demand from the heating system (ow rate decrease) and is
proportionally increased with increasing demand of the heat demand
from the heating system (ow rate increase).
Blue
min-max mode – Fixed speed
The circulator maintains a xed speed irrespectively of the heat demand
from the heating system (ow rate).
The speed regulation is done by positioning the selector in a gradual
manner at any point between the Min and Max positions.
Should this performance be insucient, progressively increase the set
value. Should this performance be excessive or should noise arise due to
the speed of the pumped uid, progressively reduce the calibration.
Flashing white Automatic detection of the presence of air - Vent system.
Proceed with the vent routine
Red Fault or malfunction
Faults, causes and remedies

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
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6.4 Automatic detection of the presence of air - Vent system
1a 1b
23
10 min
Fig. 6.2 Filling and venting of heating systems
Fill and bleed the system correctly. The circulator can be noisy at start due to the presence of air. Such noise should
stop after few minutes of operation. Usually the pump rotor chamber normally bleeds automatically after a short time
in operation.
The circulator is equipped with a special software system that detects the presence of excess of air within the heating
system. The LED shows the presence of air in the hydraulic circuit by ashing and performing a rapid succession of
WHITE colour.
Following the light signal, it’s possible to easily vent the heating system as follows:
1. Open the air vent valve in the hydraulic circuit above the circulator or open the cap of the air separator in the pump
housing, partially unscrewing it; when unscrewing the cap of the air separator, beware of not losing the cap itself;
2. set the circulator to MAX position (maximum performance setting);
3. let the circulator run for a short period, according to the construction and the plant size;
4. once vented the system - the guide light (LED) stops blinking and the possible noise stops - set the circulator as
indicated in Par.7 Circulator setting.
Repeat the procedure if necessary.
With solar thermal systems, ll the system with mixtures prepared for that application. The circulator cannot be used
to mix the uids in the system.
The plant cannot be drained by using the circulator.
Do not touch the uid or the circulator when the temperature is greater
than 60 °C. Hazard of scalding by simple contact.
CAUTION

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
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LED SELECTOR
Modify the performance of the circulator (head) as needed by rotating the selector using a at screwdriver, as given in
the following table. The selection of the right functioning curve depends on the characteristics of the heating system
in question and the actual heat demand.
* Factory setting
min-max
Lowest proportional curve P1*
Highest proportional curve P2
Fixed speed curves min-max
min
max
P2
P1
CI
CII
P2
P1
CI
CII
0
0
105 15 Q [US.gpm]
Q [m3/h]
Q [l/s]
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.00.0
0.0 0.2
H [m]
Q [IMS.gpm]105
6
7
5
4
3
2
1
0
H [ft]
20
15
10
5
0
0.4 0.6 0.8 1.0
min - max
7. CIRCULATOR SETTING
8. PERFORMANCE CURVES

ELECTRONIC CIRCULATOR FOR HEATING SYSTEMS - Art. P329
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The circulator does not require any special maintenance during operation.
Motor bearings are lubricated by the pumped liquid.
Should you fail to eliminate the cause of the malfunction, refer to the Distributor or nearest Service Center.
Before each maintenance intervention, disconnect power supply and
wait for the circulator to cool.
9. MAINTENANCE
10. FAULTS, CAUSES AND REMEDIES
10.1 Fault nding table
FAULTS CONTROL
PANEL CAUSES REMEDIES
The circulator is
noisy
LED on
Suction pressure
is insucient -
cavitation
Increase the system suction pressure within the per-
missible range.
LED on
Presence of foreign
bodies in the
impeller
Disassemble the motor and clean the impeller
Loud noises of
water circulation
Flashing white
LED Air in the system Vent the system (→6.4 Automatic detection of the presence of air - Vent system)
LED on The ow is too high Reduce the rotation speed (→7 Circulator setting)
Circulator is not
running although
the electrical
power supply is
switched on
LED o
Insucient supply
voltage
Verify voltage value of the electric plant. Verify the
connection of the motor
One fuse in the
installation is blown Verify the fuses of the plant
The circulator is
defective Replace the pump
Overheating
Let the pump cool down for some minutes. Then try
to re-start it.
Verify that the water and ambient temperature are
within the indicated temperature ranges.
Circulator is not
running although
the electrical
power supply is
switched on
LED red
The rotor is blocked
Disassemble the motor and clean the impeller if the
Should you fail to eliminate the cause of the
malfunction, refer to the Distributor or nearest
Service Center. doesn’t succeed (→ 10.2)
Insucient supply
voltage
Verify that the power supply matches the data on the
name plate

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10.2 Unlocking procedure
red light in the LED indicates a locking.
Turn the selector to the position max, disconnect and connect power supply to start the
automatic release process.The circulator operates 100 attempts to restart (process lasts
approximately 15 minutes).
Every restart is signalled by a short ash of LED light. If the locking is not removed through the
automatic release process after 100 attempts to restart the circulator, it goes into standby and
the LED remains red. In this case follow the manual procedure described in the next steps:
1. Disconnect power supply - the warning light switches o.
2. Close both isolating valves and allow cooling. If there are no shut-o devices, drain the
3. system so that the uid level is beneath that of the circulator.
4. Carefully pull the rotor/impeller
5. Remove impurities and deposits with appropriate agents.
6. Reinsert the rotor/impeller
7. Set the selector on the wished position.
8. Connect power supply.
If the circulator doesn’t run →10 Faults, causes and remedies
With high uid temperatures and pressures there is the risk of burnings.
Hazard of scalding by simple contact.