Choose the correct parameters for:
• operation mode
• alternation type
• alteration value.
Examples:
• If the SCALA1 booster system is set up as Duty/
Standby with alternation on the number of starts
= 1, this means that every time the system starts
a different pump is running.
• If the SCALA1 booster system is set up as Duty/
Standby with alternation on the number of starts
= 5, this means that pump 1 will start first for 5
times before switching the priority to pump 2.
• If the SCALA1 booster system is set up as Duty/
Assist with alternation on runtime = 5h, this
means that pump 1 will start first every time until
the system reaches 5 hours of operating time.
Then the priority will be swapped between
pumps.
Range and default values for alternation
Minimu
m
Default
Maxim
um
Resolu
tion
Alternation of
starts and stops
1 1 100 1
Alternation
runtime [h]
0.5 5 100 0.5
11. Service
WARNING
Electric shock
Death or serious personal injury
‐ Switch off the power supply before you
start any work on the product. Make
sure that the power supply cannot be
switched on accidentally.
WARNING
Chemical hazard
Death or serious personal injury
‐ Make sure that the product has only
been used for water. If the product has
been used for pumping aggressive
liquids, flush the system with clean
water before you start work on the
product.
WARNING
Biological hazard
Death or serious personal injury
‐ Make sure that the product has only
been used for water. If the product has
been used for pumping aggressive
liquids, flush the system with clean
water before you start work on the
product.
WARNING
Pressurised system
Death or serious personal injury
‐ Before dismantling the pump, drain the
system or close the isolating valves on
both sides of the pump. Slowly loosen
the drain plug and unpressurise the
system.
CAUTION
Impurities in the water
Minor or moderate personal injury
‐ Before the pump is used for supplying
drinking water, flush the pump
thoroughly with clean water.
‐ Use spare parts approved by
Grundfos.
Only qualified persons are allowed to
service the pump.
11.1 Maintenance
The pump is maintenance-free, but we recommend
that you check and clean the condensation plugs and
integrated non-return valve once per year or as
needed.
11.1.1
Cleaning of condensation plugs
1. Remove the condensation plugs carefully with a
suitable tool, for example, a small screwdriver.
2. Rinse the condensation plugs with water.
3. Reinsert the condensation plugs carefully by
pressing them in place with a finger.
Example:
23
English (GB)
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