AIR COOLED SCROLL CHILLER CONTROL
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If Tin≥T2, the second group of E-heater stop.
If T1＜Tin＜T2, the second group of E-heater keep original state.
If Tin ≤T1+1 detected by inlet water temp. sensor, the first group of E-heater run.
If Tin≥T2+1, the first group of E-heater stop.
If T1+1＜Tin＜T2+1, the first group of E-heater keep original state.
If turning off control function of E-heater by display board, E-heater won’t run.
2.3 Antifreezing Protection Control
If auto antifreezing function is turned on by display board at unit off under heating mode, the unit
will have this function.
If antifreezing temp. of any module Tfi <＝3.5℃ (adjustable), corresponding water pump will
start.
If antifreezing temp. of any module Tfi <＝1.5℃, the unit will heat with E-heater off.
If antifreezing temp. of all modules Tfi >＝15℃, the unit will stop.
If antifreezing temp. of any module 1.5<Tfi <15℃, the unit will keep original state. ｉ= 1,2.
If auto antifreezing function is turned off by display board, the unit will quit this function.
2.4 Control of 4-Way Valve
4-way valve is always off in cooling mode. Refer to 2.2 for control of 4-way valve in heating
mode.
2.5 Control of Water Pump
Water pump is open while the unit is on and it is closed after the compressor stops for some min.
Water flow switch protection means water pump is closed while the compressor stops. Refer to 2.3
for control of water pump in auto antifreezing operation.
3 WIRED REMOTE CONTROLLER
3.1 Function
One LCD can be used to control 1～8 sets of chiller in one system, it is used to display
control menu, accept and display all the parameter which is sent by main board, set the parameter,
and send the setting parameter to main board.
3.2 Operation View
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