DORCHESTER DR-FC 25, Installation, Commissioning And Maintenance Instructions

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Installation
32 Instruction Manual DR-FC
3
is
3.10.5 Continuous pump
The continuous pump will start up as soon as mains power is connected to the
water heater.
1. Connect phase (L), neutral (N) and earth (
A
) to terminals 7, 8 and 9 as
indicated in Table 3.9 .
2. Fit the cable in the pull relief.
3. If you do not need to make any more connections:
- Fit the cap on the electrical connection block.
- Fit the covers onto the water heater.
3.10.6 program-controlled pump
Switching on of the program-controlled pump is determined by settings of the
control panel.
1. Connect phase (L), neutral (N) and earth (
A
to terminals 10, 11 and 12 as
indicated in Table 3.9 .
2. Fit the cable in the pull relief.
3. If you do not need to make any more connections:
- Fit the cap on the electrical connection block.
- Fit the covers onto the water heater.
3.10.7 Extra ON mode switch (“Heater ON”)
Heater ON is a facility for connecting an external ON/OFF switch. In the OFF
position, the programmed operating mode is active. In the ON position, the
programmed operating mode is overruled, and the “ON mode” is active.
1. Connect cables (X
1
and X
2
) to terminals 5 and 6 as indicated in Table 3.9 .
2. Fit the cable in the pull relief.
3. If you do not need to make any more connections:
- Fit the cap on the electrical connection block.
- Fit the covers onto the water heater.
3.10.8 Connecting extra error signal (“Alarm OUT”)
Alarm OUT is a potential free terminal that is switched when an error is
detected. This can be used to signal errors, for example by turning on a lamp.
A 230 V circuit can be directly powered. For other voltages, a specific relay
prescribed by Hamworthy is required.
1. Connect the phase cables (X
1
and X
2
) to terminals 13 and 14 as indicated
in Table 3.9 . If required, connect earth (
A
) to terminal 15.
2. Fit the cable in the pull relief.
3. If you do not need to make any more connections:
- Fit the cap on the electrical connection block.
- Fit the covers onto the water heater.