Table 7. Electrical connection
Component Connection
Internal auxiliary heater I/O-card, output for 3 kW and 6 kW as well as Defrost card, output for 6 kW (normal connections)
External auxiliary heater Defrost card; 283, connected and fused with 086U9685
Additional shunt Terminal block, 215/216
External exchange
valve
I/O-card, 214 kW, connected and fused with 086U9685
For system solution 3, the heat pump's integrated exchange valve must be limited in open mode to the heating
system.
To limit the direction of flow for the exchange valve for the heating system, carry out the following steps:
1. Check that the main circuit breaker is on.
2. Open the SERVICE menu by pressing and holding the left button in for five seconds.
3. Open the control computer menu SERVICE -> MANUAL TEST.
4. Set the value for MANUAL TEST to 1.
5. Set the value for REV.V. HOT WATER to 0.
6. Wait at least 15 seconds, disconnect the quick connector at the exchange valve.
7. Set the value for MANUAL TEST back to 0.
8. Connect the external exchange valve cables according to the tables above.
9. Move the supply line sensor out to the position shown in the diagram for System solution 3.
6.9 Changing the number of auxiliary heating power stages
Caution! Setting the maximum permitted number of power stages for the auxiliary heating must be
carried out.
1. Ensure that the main circuit breaker is on.
2. Open the SERVICE menu by pressing and holding in for five seconds.
3. Change the number of auxiliary heating power stages in the control system's menu SERVICE -> AUX.HEAT -
> MAXSTEP, select the number of stages using + and -.
44 – Installation instructions VMBMA1002
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