Grundfos CH, Инструкция по установке и эксплуатации

Страница: 6 / 17

6
CONTENTS
Page
1. Applications 6
2. Function 6
3. Installation 6
3.1 Assembly 6
3.2 Location 6
3.3 Pipework 6
3.4 Priming 6
3.5 Electrical connections 6
4. Adjustment 7
4.1 Calculation of cut-in/cut-out pressures 7
4.2 Adjustment of tank precharge pressure 7
4.3 Setting of pressure switch 7
5. Operation and maintenance 8
5.1 Checking the tank precharge pressure 8
5.2 Frost protection 8
6. Technical data and operating
conditions
8
7. Disposal 8
1. Applications
The Grundfos pressure booster sets, types CH and
JP, are mainly used for domestic water supply or
booster systems.
2. Function
The booster set cuts in and out by means of the
pressure switch. When water is tapped from the sys-
tem, it will at first be tapped from the diaphragm tank,
fig. 1.
Fig. 1
Then the pressure falls to the preset cut-in pressure,
and the pump will cut in.
When the water consumption drops, the discharge
pressure increases, and the pump cuts out when the
pressure reaches the preset cut-out pressure of the
pressure switch.
3. Installation
3.1 Assembly
The booster set should be installed according to the
figures on pages 89 to 90, the components being
assembled in numerical order. Pos. 5 on page 88
and pos. 2 on page 90 are not fitted in sets which are
ready-mounted on delivery.
Note: The threads must be wrapped with tape or
yarn. The gasket is to be fitted between the hose and
the tank.
3.2 Location
The booster set should be located and connected in
accordance with local regulations.
The motor of the booster set must not be covered as
an adequate supply of cool air must reach the motor
cooling fan.
3.3 Pipework
The pipes connected to the booster set must be of
adequate size.
Note: If the booster set has no non-return valve, a
non-return/foot valve must be fitted in the suction
pipe of the pump.
3.4 Priming
Before starting, the pump must be filled with liquid.
Please refer to the installation and operating instruc-
tions for the pump in question.
3.5 Electrical connections
The electrical connections should be carried out in
accordance with local regulations.
The operating voltage and frequency are marked on
the nameplate. Please make sure that the motor is
suitable for the electricity supply on which it will be
used.
Single-phase motors, 1 x 110/220 V, 60 Hz, do not
incorporate overload protection and must be con-
nected to an approved motor starter.
Other single-phase motors do incorporate overload
protection and consequently require no additional
motor protection.
Three-phase motors must be connected to an
approved motor starter.
If other pumps than Grundfos pumps CH or JP are
used, it must be ensured that the nominal current of
the motor does not exceed the nominal current of the
pressure switch.
These instructions concern the adjustment
of the booster set. Please refer to the
installation and operating instructions for
the pump in question.
TM
00
28
23
03
94
3 bar
2 bar
3.5 bar
Never make any connections in the termi-
nal box or in the pressure switch unless
the electricity supply has been switched
off.