Technibel PHT 13, Installation Instruction

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GB
6
4.3.4 - REMOTE CONTROL
• See paragraph "accessories".
4.3.5 - MISCELLANEOUS
• Alarm transfer:
Potential-free changeover contact (2A - 250 VAC max.) available on the unit's terminal strip (terminals 5 (common), 6
and 7 of the printed circuit) for remote signaling. See schematic.
- In case of alarm:
- contact open between terminals 5 and 6,
- contact closed between terminals 5 and 7.
5 - OPERATION OF “ECH” ELECTRONIC CONTROL
• See the wiring diagrams at the back of the manual.
5.1 - DELIVERY STATE
• The control unit is supplied fitted in the machine and
factory pre-set.
• All the connections are made except those concerning the
available signals or the options.
5.2 - PRINCIPLE
• The microprocessor controls the operation of the machine
and of the associated alarms.
It continuously compares the water temperature
measured by the probe
SD1
and the setpoint temperature
value entered via the keyboard.
Each operating request produced by the control unit is
indicated by the light (
6
) (see below).
This light flashes if a safety delay is in progress. It stays on when the compressor is operating.
• The control probe SD1 is located on the water inlet in the factory.
• The controller is connected on a printed circuit board on which the inputs and outputs are connected.
On this board:
- 12 V supply transformer,
- the alarm report relay,
- the 230 V circuit fuse (4 A - 250 V - 5x20 - fast - breaking capacity: 1.5 kA).
5.3 - PRESENTATION
5.3.1
-
DISPLAY KEYBOARD
(1) Key for:
- Local On / Off control,
- access to parameters (in combination with button (
2
)),
- alarm clearance,
- hour counter reset.
(2) Key for:
- access to parameters (in combination with button (
1
)).
(3) LED display.
(4) Cooling mode indicator (not used).
(5)
Heating mode indicator.
(6) Compressor on indicator.
(7) Defrosting indicator.
(8)
Anti-freeze on indicator.
(9) Decimal point: if illuminated when the operating time is displayed, the value must be multiplied by 100.
6 4 2
7
8 3 9 1
5
DIGITAL INPUTS
12 VAC
SUPPLY
TRANSFORMER
ACTUATORS
SD1 Water inlet
temperature probe
(for control)
SD2 Water
outlet temperature
probe (for anti-
freeze protection)
SD3 Air heat
exchanger
temperature probe
(for defrosting and
pressure
adjustment)
SD4 Outside
temperature probe
ECH 210 BDT
CONTROLLER
AI1
AI2
AI3
AI4