Applications; Pumped Liquids; Installation; Terminal Box Positions - Grundfos UPED 50-12 Montage- Und Betriebsanleitung

2. Applications

The UPE Series 2000 is designed for circulating liq-
uids in heating systems. The pumps can also be
used in domestic hot-water systems.
UPE Series 2000 is suitable for:
• systems with a constant flow where it is desira-
ble to optimize the setting of the pump duty point
and
• systems with variable flow-pipe temperatures.

2.1 Pumped liquids

Thin, clean, non-aggressive and non-explosive liq-
uids, not containing solid particles, fibres or mineral
oil.
In heating systems, the water should meet the
requirements of accepted standards on water quality
in heating systems, e.g. the German standard VDI
2035.
In domestic hot-water systems, it is advisable to
use UPED 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 TPE pump is recommended.
The pump must not be used for the trans-
fer of inflammable liquids such as diesel
oil, petrol or similar liquids.
Liquid flow
direction
→
Pump type
UPED 50-120
UPED 65-120
UPED 80-120
UPED 100-60
Note: Pumps mounted in horizontal pipes must be
fitted with an automatic air vent in the upper part of
the pump housing.
The automatic air vent is not supplied with the pump.

3.1 Terminal box positions

The terminal box can be turned to the positions
shown in figure 3.
Note: The terminal box must only be turned to the
positions below.
Fig. 3
X X
X X
X X
X X

3. Installation

When installing pumps, types UPED 50-xx and
65-xx, with oval bolt holes in the pump flange,
washers must be used as shown in fig. 2.
Washer
Fig. 2
See mounting dimensions at the end of these
instructions.
Care should be taken to ensure that per-
sons cannot accidentally come into con-
tact with hot surfaces of the pump.
The pump must be installed with the motor shaft hor-
izontal.
Arrows on the pump housing indicate the liquid flow
direction through the pump.
The permissible liquid flow directions through the
pump are indicated by an "X" in the following table:
X
X
X
X

3.2 Changing the terminal box position

Before any dismantling of the pump, the
system must be drained or the isolating
valves on either side of the pump must be
closed as the pumped liquid may be scald-
ing hot and under high pressure.
Change the terminal box position as follows:
1. Remove the four screws holding the pump head.
2. Turn the pump head to the required position.
3. Replace the four screws and tighten securely.
Installation
Pump
127