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1. GENERAL
1.1 Applications
The circulating pump is used to ensure the circulation of liquids in
heating installations using hot water.
This pump cannot, in any circumstances, be used for drinking, ice
water or foods.
1.2 Technical characteristics
1.2.1 Identification plate
• Dual pump with electronic module
• Single pump with electronic module
• Circulating pump, immersed motor
• Electronic module
• Nominal diameter of flange
• Discharge head in dm
at nominal flow rate
1.2.2 Connection and power
• Fluid conveyed:
- Heating water in accordance with VDI 2035
- Water/glycol mixture with a maximum glycol content of 40%. If
more glycol is added, the discharge values should be modified
according to the increase in viscosity. Use only brand-name pro-
ducts containing inhibitors providing corrosion protection and
comply with the manufacturer's instructions.
Note: Consult us when any other fluids are used.
• Temperature of fluid
• Ambient temperature
• In order to avoid the formation of water by condensation, the
ambient temperature must be lower than the temperature of the
discharged liquid.
• Maximum permissible service pressure for the pump (see identifica-
tion plate).
• Minimum pressure head on suction to avoid cavitation noise. (See
table below).
For a maximum water temperature
Max. temperature DN 32
DN 40
+70°C
5
9
+90°C
9
13
+110°C
16
20
These values are applicable for altitudes of up to 300 metres above
sea level. (Allow 0.01 bar for every additional 100 m elevation).
• Protection factor
• Mains voltage
• Frequency
When ordering any spare parts, the data on the identification plate
should be specified.
2. SAFETY
This manual must be read carefully before proceeding with installa-
tion and commissioning. In particular, care must be taken to comply
with the points concerning the safety of the equipment with respect
to intermediate or final users.
2.1 Symbols for istructions in manual
Potential hazard for safety of personnel.
Instructions on electrical risks.
D / S X E
5 0 - 9 0
: +20 to +110°C
: +40°C max.
DN 50
DN 65
DN 80
8
5
10
12
9
14
19
16
21
: IP 43
: Single-phase 230 V (± 10%)
: 50 Hz (in accordance with IEC 38)
Instructions indicated in this way must be complied
with in order to avoid the risk of damaging the
CAUTION!
equipment and adversely affecting its operation.
2.2 Safety warning specific to product
Caution must be taken due to the risk of burns when the
appliance is operating. The temperature of the motor casing
can exceed 100°C.
3. TRANSPORT AND STORAGE
As soon as the equipment is received, check that it has not been
damaged during transport. If any defect is noted, all the necessary
steps must be taken with regard to the carrier.
If the equipment delivered is to be installed some
CAUTION!
time later, store it in a dry place and protect it
against impacts and all external effects (humidity, freezing conditions,
etc.). The storage temperature must be between -10°C and +50°C.
4. PRODUCTS AND ACCESSORIES
4.1 Pump (See FIG. 1)
The pump is fitted with an immersed motor which has all its moving
parts immersed in the liquid conveyed. According to the type of
construction, the liquid conveyed lubricates the impeller shaft with
journal bearing. The pump can be fitted in single or dual pump confi-
guration on the heating system.
An electronic module is located on the housing (see FIG. 2). This
controls the differential pressure of the pump so that the adjusted set-
point value remains within the setting range. The differential pressure is
governed by different criteria according to the type of setting. For all
types of setting, however, the pump is capable of constantly adapting
to changes in the required characteristics including, in particular, in the
case where thermostatic valves or mixers are added.
Main advantages of electronic control:
• Economizing of discharge valves
• Energy savings
• Attenuation of flow noises.
Types of setting that can be selected:
Δp-c - The electronic module keeps the differential pressure genera-
ted by the pump constant at the set-point differential pressure value
Hs until the maximum characteristic operating curve is reached, by
means of the authorized flow rate condition. (See FIG. 3).
Δp-v - The set-point differential pressure value to be ensured by the
pump is modified in a linear manner by the electronic module bet-
ween Hs and 1/2Hs. The set-point differential pressure value H
increases or decreases with the required flow rate. (See FIG. 4).
Controller mode - The pump rotation speed is maintained at a rota-
tion speed of n
and n
min
controller deactivates the control on the module.
In the "auto" operating mode, the pump is capable of recognizing
a minimum heating power requirement of the system by decreasing
the temperature of the discharged liquid and, therefore, of placing
itself in standby configuration (minimum curve). When the power
requirement increases, the pump is automatically reactivated in
controlled mode.
The pumps are equipped with an electronic system protecting
against overloads which shuts down the pump if an overload occurs
on the motor.
The module is equipped with a non-volatile memory for data stora-
ge. Data is preserved in the event of a power line disturbance of any
duration. When the power is restored, the pump restarts in accor-
dance with the settings specified before the power line disturbance.
The module's identification plate is bonded in place in the connection
compartment. It contains all the information regarding the type of
module.
10
(see FIG. 5). The operating mode
max
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