Daikin VAM-FA Technical Data Manual

Daikin VAM-FA Technical Data Manual Manual pdf 60 page image

• Heat reclaim ventilation • VAM-FA/FB114• Ventilation • Heat reclaim ventilation5814 Optional accessories14 - 3 BRP4A50: Heater control kitOperation range of the HRV is “ –10°C to 50°CDB 80% RH or below.”When operating the HRV units at or below –10°C of the outdoor air temperature, use preheater (field supplied) to preheat outdoor air.This kit is required to have ON / OFF delay control when preheater is used. (Initial setting is required.)Cautions• For electric heater, safety devices and installation location, follow the standards or regulations of each country.• Use nonflammable duct for the electric heater. Be sure to keep 2 m or more between the heater and HRV unit for safety.• For the HRV units, use a different power supply from that of the electric heater and install a circuit breaker for each.Electric heater capacity formulaHeat capacity P (kW) = 0.29 × Air flow rate × Temp. / 860For VAM500FJVE when Air flow rate = 500m3 / h (Ultra-high) and preheater so that the outdoor temp. rise from–20°C to –10°C (Temp. = 10 °C)P = (0.29 × 500 × 10) / 860 = 1.68 (kW)Check the temperature rise at low notch.For 2kW heater, when 300m 3 / hT = (860 × P) / (0.29 × Air flow rate)= (860 × 2) / (0.29 × 300) = 19.7 °CTherefore – 20 + 19.7 = –0.3°CCautions at initial setting• Make sure to set remote control of HRV at initial setting as follows:(for ON / OFF delay)• Heater operating conditionHeater starts operation when it is judged as Heating operation.(Judged from VRV signal of heating operation or HRV signal of thermostat.)• ON / OFF delayHeater starts 10 seconds after HRV starts operation.Fan stops 3 minutes later after HRV stops operation.Setting mode Setting switch no. Setting positionHeat setting 19 8 03 or 04(HC0097)HRVFANEH10 sec delay 3 min FAN delayONOFFOFFonOFFheatcoolon