ITT Lowara Ecocirc auto Series, Installation And Operating Instructions Manual

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en
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Screw connections for installing the pump in the system are not included in the scope of
delivery, but they may be ordered as accessories from the manufacturer.
Use new O-rings (included in the scope of delivery) when installing the pump.
The customer must take appropriate isolation measures and provide appropriate acoustic
insulation to reduce possible noise transfer.
7.1
Electrical connection (see figure 5)
The unit may only be connected by an authorized electrician.
The pump must be filled before the electrical connection is made;
if not, the bearings will be destroyed by dry operation. The
pumps do not require a separate motor circuit breaker. The
connection must be made as shown in figure 5.
7.2
Getting started
The pump may not be run dry, as this can destroy the bearings in
a very short time.
Before starting, the system must be:
- Filled.
- Rinsed thoroughly to prevent foreign objects and impurities from blocking the pump.
- Completely bled.
- Audible flow noises indicate that there is still air in the pump.
Bleeding is sped up by repeatedly switching the pump on and off in the highest power
level.
The corresponding values are derived from the hydraulic calculation of the system. If this
calculation is not at hand, then the following settings can alternatively be used:
Standard single-family home Apartment house
(approx. 140 m
2
@ 50 W/m2 = 7 kW) (approx. 420 m
2
@ 50 W/m2 = 21 kW)
EV…-4 3 EV…-6 3-4
EA…-4 2-3 EA…-6 2-3
If the temperature differential between the flow and the return is too large, increase the
power; if the temperature differential is less than that which is intended, the power can
be further reduced. (Guideline values: underfloor heating: 8–10 K; radiator heating: 15–
20 K).
CAUTION
CAUTION