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English (GB) Installation and operating instructions
Original installation and operating instructions.
CONTENTS
1.
2.
3.
4.
5.
6.
7.
8.
9.
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
1. Symbols used in this document
Warning
If these safety instructions are not observed,
it may result in personal injury!
If these safety instructions are not observed,
Caution
it may result in malfunction or damage to the
equipment!
Notes or instructions that make the job easier
Note
and ensure safe operation.
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2. General
2.1 Applications
Grundfos Hydro Dome booster sets are designed for the transfer
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and pressure boosting of clean water in waterworks, blocks of
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flats, hotels, industry, hospitals, schools, etc.
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2.2 Operating conditions
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6
Liquid temperature:
6
6
Ambient temperature:
7
7
Operating pressure:
8
Minimum inlet
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pressure:
8
8
8
8
8
8
8
Maximum inlet
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pressure:
9
9
10
10
Start/stop frequency:
10
10
Liquid temperature and operating pressure may be limited by the
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diaphragm tank (or bladder tank).
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3. Product description
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The Hydro Dome booster set consists of two identical Grundfos
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CHV pumps connected in parallel and mounted on a common
base frame, suction and discharge manifolds, isolating valves,
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non-return valves, pressure gauge, pressure switches and the
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controller CS 201 (single-phase) or CS 203b (three-phase).
A diaphragm tank (or bladder tank) must be included in the
installation. One 24-litre tank can be installed on the discharge
manifold. If two 24-litre tanks are installed, the manifold must be
properly supported. Additional tanks can be placed on the floor/
wall to fulfil the system requirement. See section 5.6.
4. Operation and functions
The pumps operate automatically according to system
requirement by means of two pressure switches.
Function:
•
When a tap is opened, water is drawn from the diaphragm tank
(or bladder tank).
•
When the pressure drops to the first cut-in pressure, the first
pump will start.
•
If the consumption is still rising and the pressure drops to the
next cut-in pressure, the other pump will start.
•
When the water consumption falls, the discharge pressure
rises to the first cut-out pressure and the controller will cut out
one pump.
•
If the consumption is still falling, the last pump will finally fill
the tank and then stop.
0 °C to +40 °C.
0 °C to +40 °C.
Maximum 10 bar.
In accordance with the NPSH curve
plus other losses and a safety
margin of at least 0.5 metres
(1.64 feet) when pumping airless
water.
The safety margin should be
increased when air-containing water
is pumped.
The actual inlet pressure plus the
pressure when the pump is operating
against a closed valve should always
be lower than the maximum
operating pressure, i.e. 10 bar.
Maximum 100 per hour.
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