• Heat reclaim ventilation • VAM-FA/FB
1
14
• Ventilation • Heat reclaim ventilation
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14 Optional accessories
14 - 3 BRP4A50: Heater control kit
Operation 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 formula
Heat capacity P (kW) = 0.29 × Air flow rate × Te mp . / 8 60
For VAM500FJVE when Air flow rate = 500m
3
/ 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
/ h
T = (860 × P) / (0.29 × Air flow rate)
= (860 × 2) / (0.29 × 300) = 19.7 °C
Therefore – 20 + 19.7 = –0.3°C
Cautions at initial setting
• Make sure to set remote control of HRV at initial setting as follows:
(for ON / OFF delay)
• Heater operating condition
Heater starts operation when it is judged as Heating operation.
(Judged from VRV signal of heating operation or HRV signal of thermostat.)
• ON / OFF delay
Heater starts 10 seconds after HRV starts operation.
Fan stops 3 minutes later after HRV stops operation.
Setting mode Setting switch no. Setting position
Heat setting 19 8 03 or 04
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