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Danfoss District Energy
VI.GP.P1.02
DKDHR
Instructions
VX Solo II
Grundfos Pumpe ALPHA2
Substation start-up / pump
Do not start up the pump until the system has been filled with the
flow media and vented. It is recommended to set the pump at highest
speed of rotation before start-up. Then set the pump at lowest possi-
ble speed of rotation, in due consideration of the electricity consump-
tion and the heating comfort.
Factory-setting of the pump is AUTO
ADAPT
. AUTO
ADAPT
is suita-
ble for most systems. In this pump setting the pump performance
will continuously be adjusted to the actual system requirements.
For floor heating AUTO
ADAPT
is recommended.
Pump settings:
Floor heating and two-pipe systems:
Choose AUTO
ADAPT
-function (adjusts the pump performance to
the actual system requirements).
One-pipe systems:
Setting of pump according to the enclosed instructions.
ALPHA2
G
RUNDFOS INSTRUCTIONS
Summer operation
Substation with T°C thermostat:
In periods without heating demand the pump can be switched of on
the switch and the shut-off valve/”summer valve” S in top of the sta-
tion can be closed during this period. Switch on the pump (for a short
period) at least once per month.
For start-up follow the above start-up instructions. It is recommend-
able to vent the system after the summer periodagain.
Substation with Danfoss ECL:
The circulation pump for heating is automatically switched off in pe-
riods without heat demand. To prevent the pump from blocking in
periods without heat demand, the controller automatically switch-
eson the pump for some minutes every third day. In this period the
circulation pump should be set at the highest speed of rotation.
If the heating requirement increases the pump setting can be changed
by means of the selector switch.
For more information about venting of pumps ect. please refer to the
enclosed Grundfoss instructions.
S
