English (GB)
9
3. Applications
The pumps are designed to circulate liquids in
heating and air-conditioning systems. The pumps
can also be used in domestic hot-water systems.
3.1 Pumped liquids
Thin, clean, non-aggressive and non-explosive
liquids, not containing solid particles, fibres or
mineral oil.
If the pump is installed in a heating system, the
water should meet the requirements of accepted
standards on water quality in heating systems, for
example the German standard VDI 2035.
In domestic hot-water systems, it is advisable to
use UPS and UPSD pumps only for water with
a degree of hardness lower than approx. 14 °dH.
For water with a higher degree of hardness, a direct-
coupled TP pump is recommended.
Liquid temperature, see section 10. Technical data.
3.2 Glycol
UPS and UPSD pumps can be used for pumping
water/glycol mixtures up to 50 %.
The maximum viscosity of a 50 % glycol mixture at
-10 °C is approx. 32 cSt.
To prevent the glycol mixture from degrading, avoid
temperatures exceeding the rated liquid temperature
and minimise the operating time at high
temperatures.
It is important to clean and flush the system before
the glycol mixture is added.
To prevent corrosion or precipitation, the glycol
mixture should be checked and maintained regularly.
If further dilution of the supplied glycol is required,
follow the glycol supplier's instructions.
4. Function
4.1 Single-head and twin-head pumps with
standard module
Fig. 1 Standard module and speed switch
The function of the indicator lights on the pump is as
shown in the following tables.
Single-phase pumps
Single-phase pumps incorporate a green indicator
light only.
Three-phase pumps
Three-phase pumps incorporate a green and a red
indicator light.
Warning
The pump must not be used for the
transfer of flammable liquids, such as
diesel oil, petrol or similar liquids.
When pumping glycol mixtures, the
pump performance will be reduced.
Consult WebCAPS on
www.grundfos.com for further details.
DEX-COOL
®
glycol may damage the
pump.
TM00 9237 0602
Pos. Description
1 Standard module
2 Speed switch
Indicator light Description
On
The power supply has been
switched on.
Off
The power supply has been
switched off, or the pump
has been cut out by the
thermal overload switch.
Indicator lights
Description
Green Red
Off Off
The power supply has been
switched off, or the pump
has been cut out by the
thermal overload switch.
On Off
The power supply has been
switched on.
On On
The power supply has been
switched on.
The direction of rotation is
wrong.
To Next Page
Loading...
Need help?
General
