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Expansion joints with limiting rods can be used to minimise the
forces caused by the expansion joints. We always recommend
that you use expansion joints with limiting rods for flanges larger
than ANSI 4" (DN 100).
Anchor the pipes so that they do not stress the expansion joints
and the pump. Follow the supplier's instructions and pass them
on to advisers or pipe installers.
4.2.5 Prefilling of diaphragm tank, if applicable
If a diaphragm tank is connected to the system, prefill the tank
with nitrogen to a pressure of 0.7 times the setpoint.
Use nitrogen to avoid corrosion.
4.3 Electrical installation
CAUTION
Electric shock
Minor or moderate personal injury
- The electrical installation must be carried out by an
approved person in accordance with local
regulations and the relevant wiring diagram.
- Switch off the power supply and lock the main
switch with a padlock to ensure that the power
supply cannot be accidentally switched on.
•
The electrical installation of the booster system must comply
with enclosure class UL type 3R.
•
Check that the power supply and frequency correspond to the
values stated on the nameplate.
•
Make sure that the conductor cross-section meets the
specifications in the wiring diagram.
See the wiring diagram supplied with the booster
system. Tighten all wire terminals in the panel before
switching on power to the panel.
If the system cannot be installed with the supply
disconnecting device located minimum 2 ft (0.6 m)
above service level according to EN 60204-1
paragraph 5.3.4, install the system with an external
"supply disconnecting device" made according to EN
60204-1, paragraph 5.3.2. The system must be
provided with a means permitting it to be locked in
the OFF (isolated) position.
5. Starting up the product
A positive inlet pressure is required before startup
and during operation.
Do not start the pumps until they have been fully
primed.
Set the precharge pressure on the diaphragm tank
with zero pressure on the tank.
After having carried out the mechanical, electrical and hydraulic
installation described in sections
4.3 Electrical
installation, proceed as follows:
5.1 Positive inlet pressure startup procedure
1. Check that the precharge pressure in the diaphragm tank is
0.7 times the required outlet pressure (setpoint).
Measure the precharge pressure in the diaphragm
tank while the system is not pressurized.
2. Close all pump outlet isolation valves on the Multi B system.
3. Open the outlet valve on one pump and turn the tap on the
outlet side of the system allowing water to pass through the
pump. Once complete, close the isolation valve.
4. Repeat step 3 for all remaining pumps in the system. Once
complete, open the outlet isolation valve on all pumps after all
pumps have been vented.
5. Switch on the main switch.
6. Turn the system on by pressing [On/Off] and adjust the
setpoint to the desired setpoint value by pressing arrow up or
arrow down on the controller.
4.2 Mechanical
installation,
5
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