Grundfos STR2 User Manual

English (GB)
7
4.1 Positioning the pump
Keep the pump as close as possible to the source of hot and cold
water.
For optimum performance, ensure the following:
• A good water flow to the pump.
• Sufficient inlet head. See table and fig. 3.
• Unrestrictive pipes, 22 mm. See fig. 4.
• Provision to prevent air locks. See fig. 4.
Place the pump in a well-ventilated location.
Fig. 3 Inlet head
Fig. 4 Unrestricted pipe
Position the pump horizontally with the outlet ports vertically
upwards to ensure correct operation of the flow switches.
Fig. 5 Positioning the pump
Connect the pump and shower system as shown in fig. 10.
There must be a minimum height between the bottom of the cold-
water storage tank and the highest point of the outlet pipe or the
shower outlet of at least 250 mm. See fig. 6.
Fig. 6 Minimum height difference
Install the pump in accordance with the Water Supply (Water
Fittings) regulations 1999.
Position the pump at the base of the hot-water cylinder. See fig.
7.
Fig. 7 Positioning the pump in relation to hot-water cylinder
For installation within a bathroom, locate the pump in accordance
with local regulations.
Position the pump at least 0.6 metres horizontally away from or 3
metres vertically above floor from any bath, shower tray or basin.
Select a position for installing the pump which affords
easy access for subsequent servicing and
maintenance.
Type Inlet head [m]
STP, SSP 1-20
STN, SSN 1-8
STR2, SSR2 1-10
STR2 CN, SSR2 CN 1-8
TM05 6968 0313
TM05 6976 0313
=
H
inlet
> 227 litres
(50 gallons)
Do not cover the pump; otherwise, the motor will
overheat.
Place the pump in a frost-free location.
TM05 6969 0313TM05 6967 0313TM05 6975 0313
The pump may be fitted under a bath, providing this
space is only accessible through the use of a tool.
> 227 litres
(50 gallons)
Min. 250 mm

Grundfos STR2 Specifications

General

Brand	Grundfos
Model	STR2
Category	Water Pump
Language	English