Positioning The Product; Frost Protection; Product Introduction; Applications - Grundfos UPS Series Installation And Operating Instructions Manual

5.2 Positioning the product

CAUTION
Hot surface
Minor or moderate personal injury
- Position the pump so that persons
cannot accidentally come into contact
with the hot surfaces.
When installing pumps, types UPS, UPS D 32-xx,
40-xx, 50-xx and 65-xx, with oval bolt holes in the
pump flange, use washers as shown in fig. 9.
Washer
Fig. 9 Position of washers for oval bolt holes

5.3 Frost protection

If the pump is used during periods of frost, necessary
steps must be taken to prevent frost bursts.

6. Product introduction

UPS, UPS D multispeed circulator pumps can run at
three different speeds.
The pumps are available as single-head or twin-head
pumps. All pumps incorporate a thermal switch in the
stator.
The pumps are available as:
• cast-iron pumps with black nameplate
• bronze with bronze nameplate and a B in the type
designation.
Terminal box modules
Single-head pumps are fitted with a standard module
in the terminal box.
Twin-head pumps are fitted with a standard module
or a relay module in the terminal box.
The relay module is available as an optional extra for
single-head pumps.

6.1 Applications

The pumps are designed for circulation of liquids in
heating and air-conditioning systems. The pumps
can also be used in domestic hot-water systems.
Installation
Pump

6.2 Pumped liquids

Clean, thin, 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
must meet the requirements of accepted standards
on water quality in heating systems, for example the
German standard VDI 2035.
In domestic hot-water systems, we recommend that
you use the pumps only for water with a degree of
hardness lower than approx. 14 °dH. For water with
a higher degree of hardness, we recommend a
direct-coupled TP pump.
Liquid temperature, see section
WARNING
Flammable material
Death or serious personal injury
Do not use the pump for flammable liquids,
such as diesel oil and petrol.

6.3 Glycol

The 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.
When pumping glycol mixtures, the pump
performance will be reduced.
Consult Grundfos Product Center on
www.grundfos.com for further details.
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
adding the glycol mixture.
To prevent corrosion or precipitation, check the
glycol mixture and maintain it regularly. If further
dilution of the supplied glycol is required, follow the
glycol supplier's instructions.
®
DEX-COOL glycol may damage the
pump.
9. Technical data.
7