Grundfos PHP A-1 4.0, Instruction Manual

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PHP A-1 Instruction Manual / Appendix
50
APPENDIX B - HYDRAULIC CONNECTION BETWEEN PHP
AND EXPANSION VESSEL
PHP series devices do not have a built-on vessel.
The expansion volume must be stored in external expansion
vessels. To enlarge the expansion volume, additional
expansion vessels must be used.
Generally the connection of the particular devices must be
installed on-site according to the appropriate piping diagram
in Chapter 3.
1. Pay attention to the right connection of the
particular devices.
Expansion vessels use built-in components (at the lower
vessel flange) for a correct degassing.
Herefore it is necessary to connect the overflow pipe of the
PHP device with the overflow pipe of the expansion vessel
and the suction pipe of the PHP with the suction pipe of the
expansion vessel.
1. Overflow pipe
2.
Suction pipe
NOTE
To ensure a correct function of the pressure maintenance
unit you have to consider the following instructions for the
connection between PHP and expansion vessels.
800M and above
1
2 2
1
NOTE
Overflow pipe PHP = overflow pipe
Suction pipe PHP = suction pipe
2. Installation of the suction pipe
Sometimes it is necessary to cross the overflow pipe and the
suction pipe to connect PHP and expansion vessel correctly.
Please note that the suction pipe is installed without any
differences in level. Try to avoid these differences as much
as possible.
If these differences between PHP and expansion vessel
cannot be avoided, the suction pipe must be installed rising
from PHP to expansion vessel.
Suction pipe
Bends, crossover-fittings etc. only in overflow pipe
NOTE
Bends, crossover-fittings etc. which are necessary for
crossing may only be installed at the overflow pipe.
To ensure a trouble-free level compensation between the
single vessels, suction pipe and
overflow pipe must be installed at ground level over the
entire length.
up to 500M