EvoControl Ventilation - Counterflow

200 Controller type

Till:

• Constant supply air control.
• The controller keeps the supply air temperature constant at the setpoint.

From:

• Extract air control / Room control (Cascade control) - With min and max limitation of supply air.
• The extract air/room temperature is kept constant by allowing the supply air temperature to vary.
• The supply air temperature can vary with the cascade factor parameter 272. Parameter 262 (minimum limitation) and parameter 263 (maximum limitation) override.
• Example. If the desired temperature is 20°C and the cascade factor is 5, the supply air can vary between 15°C and 25°C.

AUTO:

• Outdoor temperature-controlled switching between supply air control and room/off control.
• If the outdoor air temperature is lower than the changeover temperature parameter 201, supply air control applies.
• If the outdoor air temperature is higher than the changeover temperature parameter 201, exhaust air control applies.
• Fixed Switching differential +/-2°C.

FRT:

• Exhaust air-related supply air control.
• Supply air control with extract air temperature as setpoint + setpoint for temperature difference in parameter 220->224.
• The supply air temperature is controlled to be equal to the exhaust air temperature with a temperature difference set in parameter 220->224.

201 Switching temperature auto

• Switching temperature between supply and extract air/room control.
• The specified outdoor air temperature acts as the cut-off point for the control type.

205 Neutralzone Kyla

• Setting the neutral zone before controlling the cooling signal.

210 - 214 Setpoint temperature

• Setting of temperature setpoints in different operating modes.

220 - 224 Setpoint temperature difference FRT

• Setting of temperature difference (setpoint offset) in different operating modes of FRT control.

230 Outdoor compensation -20°C

• Stepless setpoint compensation at outdoor temperatures between -20°C and 0°C.
• Example. Setpoint = 20°C, Outdoor compensation parameter 230 = 2°K, Outdoor temperature -21°C => setpoint 22.0°C.
• Example. Setpoint = 20°C, Outdoor compensation parameter 230 = 2°K, Outdoor compensation parameter 231 = -2°K, Outdoor temperature -10°C => setpoint 20.0°C.
• Example. Setpoint = 20°C, Outdoor compensation parameter 230 = 0°K, Outdoor compensation parameter 231 = -3°K, Outdoor temperature -10°C => setpoint 18.5°C.

231 Outdoor compensation 0°C

• Stepless setpoint compensation at outdoor temperatures between 0°C and setpoint.

232 Outdoor compensation 40°C

• Stepless setpoint compensation for outdoor temperatures between setpoint and +40°C.

240 Type of post-heating (post-processing)

By:

• Reheat not active.

Ext. electricity

• External electric battery is controlled by the thermostat output, 0-10 volts.

Int. El:

• Pulse control of internal electric battery via relay output.
• The rotor must have been constantly switched on for 3 minutes before the electric battery is switched on for the first time.

Water battery:

• In case of water coil, terminals 16 and 17 are used for circulation pump heating.
• Circulation pump heating is stopped if the heating control signal is below 0 % for more than 5 minutes and the outdoor temperature is above +5°C.
• The circulation pump is exercised for 5 minutes every 48 hours, the first exercise is done after 48 hours.

Mixed signal:

• To use the same voltage signal output for e.g. a heating/cooling pump.
• The heating controller output terminal 36 provides a heating voltage signal when heating is required and a cooling voltage signal when cooling is required.
• Terminal 16 = 230 Vac at HEAT.
• Terminal 17 = Neutral (230 Vac).

241 Hysteresis EVB

• Switching differential for switching on internal electric battery.

245 Return water temperature maintenance

• When the unit is stopped, the return water temperature is maintained at the set value via the return water sensor.

246 Freeze monitor alarm limit

• If the return water temperature falls below the set value, an alarm is triggered.
• At 5°K above the alarm limit, the shunt valve starts to force open.
• The freeze guard is self-reversing.

248 Cooling signal

• Cooling signal is not sent out on terminal37 and is not shown on the flow diagram.

250 Pre-heating, Börv. Exhaust air.

• Desired exhaust air temperature.
• Low setpoint and moist exhaust air can lead to freezing of the heat exchanger.

251 Preheating, P-band

• The P-band of the regulator.

252 Preheating, I-time

• The integration time of the controller.

253 Preheat, Low Exhaust Temp

• If the extract air temperature is below the set value, an alarm is triggered after the alarm delay time set in parameter 949.

254 Preheat, High Exhaust Air Temp

• If the extract air temperature is above the set value and there is no need for preheating, the alarm is cancelled after the alarm delay time set in parameter 951.

255 Pre-heating, Fan speed reduction N-zone

• Reduces the supply air fan when the extract air temperature goes below the set value.

256 Preheat, Fan speed reduction P-band

• The P-band of the regulator.

257 Preheat, Fan speed reduction I-time

• The integration time of the controller.

258 Preheat, Fan speed reduction Alarm

• Fan speed below the set value of the set fan speed, the alarm is cancelled after the set alarm delay time parameter 953.

261 Supply air controller I-Tid

• The integration time of the controller.

262 Mines restriction

• Minimum supply air temperature limitation (applicable in all control modes).

263 Maximum limitation

• Maximum limitation of supply air temperature (applicable in all control modes).

264 Low temperature alarm supply air

• If the supply air temperature is below the set value, the alarm is cancelled after the alarm delay time set in parameter 917.

266 High temperature alarm Post-heating

• If the supply air temperature is above the set value and there is no need for reheating, the alarm is cancelled after the alarm delay time set in parameter 937.

270 Off/room controller P-Band

• The P-band of the regulator.

271 Off/room controller I-Time

• The integration time of the controller.

272 Off/Room controller cascade factor

• The cascade factor of the controller.
• The cascade factor determines the impact of the control deviation on the supply air temperature setpoint.
• Example. If the desired temperature is 20°C and the cascade factor is 5, the supply air can vary between 15°C and 25°C

273 Low temperature alarm Exhaust air

• If the temperature is below the set value, an alarm is triggered after the alarm delay time set in parameter 919.