Technibel PHRT 9 - Page 12

GB
12
• Condensate tank heating cord control:
(Accessory, see installation in paragraph 6.2).
- actuated if the outside temperature (probe SD4) drops below 0°C (regardless the unit's operating mode). The "heating
element" indicator light (8) illuminates.
• Operating mode selection
:
- the controller is factory configured to control the unit by 3 outside contacts:
• On / Stand-by ("stand-by"),
• Heating / Cooling.
- in stand-by mode, the circulating pump continues to function.
Note:
It is possible to shut the unit down completely (circulating pump stopped) by pressing the ON/OFF button (1).
- this configuration is adapted to system applications,
- for other applications, the following configurations are possible by modifying the parameterization:
a) Complete shut-down ("
OFF") by remote contact (instead of "stand-by").
In the "CnF" configuration section, change the parameter H20 from 7 (remote stand-by) to 4 (remote OFF). In the
case of remove "OFF" complete shut-down, the display is off. Only the decimal indicator lamp flashes.
b) Selection of the heating / cooling mode using the display unit's keys
.
In the "CnF" configuration section, change the parameter H27 from 1 (selection by remote contact) to 0 (selection by
keypad).
This configuration is chosen in the case where the remote display unit K 60 D 055 Z is used (Accessory, see
installation in paragraph 6.4) to control the unit, for example.
The operating mode is thus selected by successively pressing the "mode" button (2) according to the following
sequence:
---> stand-by ---> cooling ---> heating ---> stand-by ---
The stand-by mode is indicated by the extinction of the heating and cooling mode indicator lamps.
• Pre-ventilation
:
- generally speaking, in order to condition the air heat exchanger, the fan always starts at full speed a few seconds before
the compressor.
• Anti short-cycle time delays
:
- the compressor control features a time delay system in order to respect:
•a maximum number of starts per hour (12),
•a minimum stop time (150 seconds).
• Cycle inversion valve
:
- The valve is actuated in cooling mode.
• Control hysteresis
:
- See the operating diagrams in paragraph 5.4.
- The hysteresis in both heating and cooling modes are factory set at 2k. They can be modified. To do this, change
parameters C03 (cooling hysteresis) and/or C04 (heating hysteresis) in the compressor section "CP".