Grundfos PHP A-1 4.0 Instruction Manual page 30

PHP A-1 Instruction Manual / Commissioning PHP A-1
*acc. to the sticker at the upper
pressure transmitter only displayed
if level measurement L2 is available
correction value PL2u acc. to the
sticker at the lower pressure
transmitter only displayed if level
measurement L2 is available
Communication ... not available (default setting)
... SMS-Module
... ASCII-Logger
... bus module/web module
... enable contact
... not available (default setting)
... is available
INFORMATION
If device set-up was completed successfully (only
mandatory inputs necessary) this menu item is removed
permanently. The device set-up always is available in
"user level 3 settings"
STEP 9
Enable the device by pressing the key "I" in main display and
confirm it by pressing the key "F1" (Yes) (green control lamp
beside the key "I" must glow.)
STEP 10
Adjust the pressure maintenance pump(s).
Due to the necessary working pressure the pump(s) must
be adjusted on the output side. This adjustment must be
done because the delivery rate of the pump(s) (acc. to their
characteristic curve) rises at lower pressures.
A hint for a necessary adjustment could be:
After pump stop the overflow valve doesn't close completely
before approx. 0,5 bar under the upper working pressure.
NOTE
The adjustment of the pressure maintenance pump(s)
must be done before the setting of the working
pressure. After this neither the working pressure nor
the adjustment must be changed. If the Adjustment
was done subsequently the working pressure must
be set anew.
30
STEP 11
Set the working pressure.
• Open the shut off devices from/to system return (expansion
overflow pipe, expansion pressure pipe, makeup water).
Due to the size of the system the setting of the working
pressure can take up a lot of time because the pressure
has to extend into the entire connected system to be
stable for the setting.
NOTE
To ensure a correct setting of the working pressure,
the device must be connected to the system return.
• Go to user level 3 (see step 9)
• Select "settings", "pressure maintenance", "working pressure"
• The display shows the current settings (complies with the
last set working pressure, e.g. default value ex factory)
CAUTION: Independent to the displayed values the
working pressure must be set again in the course
of commissioning.
• Press the key "F1" (change) to start the pump.
• Set the overflow valve to the upper working pressure
(determined in step 1), the current pressure is shown
at the display.
The setting of the setpoint at the overflow valve happens
at the black handwheel (systems Solo and Maxi) resp. at
the hexagonal nut (wrench size 19 mm) at the spring cap
(system PHP) in clockwise direction = higher pressure,
resp. counter-clockwise direction = lower pressure.
• In devices with 2 overflow valves (system N/A for PHP), both
valves must be set one by one. One of the valves must
be shut off, at the other one the upper working pressure
can be set. Then the set valve must be shut off and the
other one can be set - repeat the above steps (set both
valves to the same pressure.)