The overall heat pump capacity is controlled based on the highest Condenser Out and
the lowest Evaporator Out temperature. The heat pumps will be permitted to start, if
any of the heat pumps is requesting a heat pump to start.
The valves in the system can be set up to influence only a specific heat pump’s flow or
the entire heat pump group's flow. If the valve controls the entire group’s flow, the valve
will be opened whenever any of the heat pumps is sending out a flow request.
If the connection with the master heat pump is lost, the affected heat pump will operate
in local control mode. However, once the connection returns, the heat pump will
automatically revert to remote control.
4.11 Setting up distribution condenser/subcooler
1. Start the circulation and open up all throttling valves to the fully open position.
If the circuit is capacity controlled, make sure the system is running at the
maximum flow.
2. Measure the individual flows and compare to the specified flows.
Measured total flow: m3/h or kg/s
If the flow notably deviates from the specified flow, search for the reason for this
deviation. Possible reasons can be pump, filter, valves, pipe length, air, gas, or
dirt in the system.
3. If the system has several condensers in parallel, follow the steps in section
Master
—Slave operation: setting up parallel units
to distribute the water correctly between
all condensers.
Keep the throttling valve for the subcoolers fully open.
4. Measure the flow through the subcoolers and throttle the inlet valves to the
condensers until the specified flow is reached to each subcooler.
5. For several parallel units, check again the distribution.
Follow the steps in section
Master–Slave operation: setting up parallel units
.
6. Repeat until the specified flow is reached.
7. In case of higher flow than specified, throttle the condenser inlet more to increase
the flow in subcooler.
Note down all set and measured flows into a copy of the PI diagram.
EXES01 2150EN
39 (66)
