Bumyang 200J, Operating Manual

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Cooling control
If room temperature is higher than desensitized belt(DB) temperature as compared with
desired temperature, 3 step control is carried out depending on the temperature difference
.(△T = room temperature - desired temperature)
(1) (DB + PB/3 + PB/3) ＜ △T ⇒ three coolers operate simultaneously(cooling high)
(2) (DB + PB/3) ＜ △T ≤ (DB + PB/3 + PB/3) ⇒ two coolers operate simultaneously(cooling
middle)
(3) DB ＜ △T ≤ (DB + PB/3) ⇒ one cooler operates(cooling low)
(4) △T ≤ DB ⇒ cooler stops
(5) Compressor 1, 2 and 3 should operate in turn every 10 operations taking into account
the duty rate of compressor 1, 2 and 3. Re-operation is only permitted in 3 minutes
after operation stops.
(6) In case of used AHU controller, 4step controlled depend on step temperature.
Heating control
If room temperature is lower than desensitized belt(DB) temperature as compared with
desired temperature, 7 step binary control is carried out depending on the temperature
difference.(△T = desired temperature -
room temperature)
(1) DB + PB ≤ △T ⇒ heater operates in 7 steps(heating= 7 step)
(2) DB ＜ △T ＜ PB ⇒ 7 step control depending on PB/7 step
(3) △T ≤ DB ⇒ heater stops
(4) If machine stops while heater operates, fan continues to operate one minute, and then
stops.
(5) The capacity ration of electric heater is 1 : 2 : 4, and controlled in 7 steps by
micro computer as follows :
STEP HEATER 1 HEATER 2 HEATER 3
0 OFF OFF OFF
1 ON OFF OFF
2 OFF ON OFF
3 ON ON OFF
4 OFF OFF ON
5 ON OFF ON
6 OFF ON ON
7 ON ON ON
(capacity ratio = 1:2:4)
(6) In case of used AHU controller, 3step controlled depend on step temperature.
Humidifier control
(△H = desired humidity - room humidity)
(1) (DB + PB/2) ＜ △Hu ⇒ two humidifiers operate simultaneously(humidify High)
(2) DB ＜ △Hu ≤ PB/2 ⇒ one humidifier operates(humidify Low)
(3) △Hu ≤ DB ⇒ humidifier stops
(4) In case of used electric steam humidifier, 1step controlled.
(5) In case of used AHU controller, 2step controlled depend on step humidity.