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Control mode (fig. 2):
Variable differential pressure (Δp-v) : The differential pressure setpoint
is increased linearly over the permitted volume flow range between 1/2H
and H.
The differential pressure generated by the pump is adjusted to the
corresponding differential pressure setpoint.
Night mode: The Temperature sensor of the pump is able to detect when
the boiler is in "night mode".
If the pump detects a significant drop of water temperature, it
automatically switches to its night curve to avoid an unnecessary
consumption of energy.
Then, the pump will revert to its pre-set operating curve as soon as an
increase in water temperature is detected.
Auto
: night mode activated
: night mode not activated
NOTE:
In the case of insufficient heating/cooling capacity of the
installation (too low a heat transfer) it must be checked whether the night
setback control is on. In this case it must be switched off.
Operating elements (fig. 1) :
• Dial knob for the differential pressure setpoint
• Setting range: Hmini = 1 m, Hmaxi = 5 m
7. INSTALLATION AND ELECTRICAL CONNECTION
Installation and electrical connection should be carried out in
accordance with local regulations and only by qualified personnel!
WARNING! Risk of personal injury!
The relevant accident precaution regulations must be
observed.
WARNING! Risk of electric shock!
Potential dangers caused by electrical energy must be
excluded. Local or general regulations (e.g. IEC etc.) and
directives from local energy supply companies are to be
followed.
7.1 Installation
- Only install the pump after all welding and soldering work has been
completed and the pipe system has been flushed through.
- When installing in the supply leg of open systems, the safety supply
must branch off upstream of the pump (DIN 4751).
- Install with the power switched off and the pump motor in the horizontal
position. See fig. 3 for installation positions of the module. Other
installation positions on request.
- Direction arrows on the pump housing and the insulation indicate he
direction of flow.
- If the installation position of the module is changed, the motor housing
has to be turned as follows:
- Undo the 2 Allen screws.
- Turn motor housing including control module.
CAUTION! Risk of damage to the pump!
When turning on the motor housing the gasket may be
damaged. Replace damaged gaskets immediately.
Size of gasket: Ø86 mm OD x Ø76 mm ID x2,0 mm thick, EP.
- Reset and fix Allen screws.
7.2 Electrical connection
WARNING! Risk of electric shock !
Electrical connection must be carried out by an electrical
installer authorised by the local power supply company in
accordance with the applicable local regulations.
- Power supply must correspond to name plate data.
- Power wiring to be in accordance with fig. 4 :
• power connections: L, N, T.
• max. line fuse: 10 A, slow action.
• The connecting cable can optionally be lead through the cable gland
on either right or left. The gland and the blank plug (PG 11) must
than be changed.
• Strictly comply with local earthing regulations.
H
Auto
Auto
Q
night curve
- The electrical connection must be made in accordance with VDE 0700/
part 1 via a fixed connecting cable, which is provided with a plug device
or an all-pole switch with a contact opening width of at least 3 mm.
- The incoming power cable must be of sufficiently large sized to
maintain protection from moisture ingress and to ensure a tight gland
grip (e.g. H05WF3G1,5 or AVMH-3x1,5).
- Heat resisting cable must be used when installing the pump in systems
with water temperatures above 90°C.
- Cable leads to be routed such to avoid any contact with the adjoining
pipework and/or the pump or motor housings.
8. COMMINSSIONING
WARNING ! Risk of burns! !
Depending on the pump or system operating conditions
(fluid temperature), the entire pump can become very hot.
Touching the pump can cause burns!
8.1 Filling and ventilation
Fill and bleed the system correctly. The pump rotor chamber normally
bleeds automatically after a short time in operation.
However, if the rotor chamber has to be bled directly, proceed as follows:
- Switch off the pump,
- Close the shut-off device on the pressure side.
WARNING ! Risk of burns! !
Depending on the system pressure and temperature of
the fluid, when the bleeder screw is opened, hot liquid or gaseous
fluid may escape or shoot out at high pressure. There is a risk of
scalding!
- Push through the perforation in the centre of the name plate and
carefully open the bleeder screw,
- Protect electrical parts from any water that escapes,
- Carefully push back the pump shaft with a screwdriver several times.
CAUTION ! Risk of damage to the pump !
The pump may jam with the plug screw open depending
on the operating pressure. Close the bleeder screw again
before switching on.
Refermer la vis de dégazage avant de remettre la pompe en marche.
- Close the bleeder screw again,
- Open the shut-off device again,
- Switch on the pump.
8.2 Selection of pump flow rate
- Select the control mode (see 6.1).
- Preselect the pump output (delivery head) depending on the need at
the setting knob (Fig. 1, item 2).
- If the nominal delivery head is not known, we recommend starting with
the setting 1.5 m.
- If the heating output is not adequate, gradually increase the set value.
- If the heating output is too high, or flow noises occur, gradually reduce
the set value.
- Select automatic night reduction mode, i.e. switch on or off (see 6.1).
9. MAINTENANCE
Maintenance and repair work should only be carried out by qualified
specialist personnel !
WARNING ! Danger of electric shock !
Prevent dangers through exposure to electrical currents.
For all maintenance and repair work, the pump must be
switched off. It must not be possible to switch it on again without
authorisation.
In principle, damage to the connection cable must only be repaired
by a qualified electrician.
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