Xylem ECOCIRC - Manual (Page 17)

17
7.2 Getting started
The pump must not run dry as this can result in the
destruction of the bearing in a very short time. Fill it with
liquid before first start-up.
Before starting, the system must be:
- Rinsed thoroughly to prevent the presence of foreign objects and
impurities which could block the pump.
- Fully filled with the pumped media (water or water-glycol mix).
- Completely purged of air.
- To help to reach this, the pump has a built-in automatic air purge
function. See instructions for activating the air purge function in
section 2 page 4.
- The air purge function can be activated any time during operation
when the presence of air is suspected in the system.
- The air purge function can be activated several times in a sequence if
necessary.
- Audible flow noise indicates that there is still air in the pump.
7.3
Typical setting
The corresponding values are derived from the hydraulic calculation of
the system. If this calculation is not at hand, then the following speed
settings can be used:
Standard single-family home Apartment block
(approx. 140 m
2
@ 50 W/m
2
= 7 kW) (approx. 420 m
2
@ 50 W/m
2
= 21 kW)
Ecocirc
…-4
2-3
Ecocirc…-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 expected,
reduce the power even further. (Guideline values: underfloor heating: 8
–
10 K; radiator heating: 15
–20 K).
ATTENTION