EvoControl Ventilation - Counterflow

200 Controller type

Till:

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

From:

• Exhaust air control/Room control (Cascade control) – With minimum and maximum limits on supply air. The exhaust air/room temperature is maintained at a constant level by allowing the supply air temperature to vary.
• The supply air temperature can be adjusted using cascade factor parameter 272.
• Parameter 262 (minimum limit) and parameter 263 (maximum limit) take precedence.
• 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.