AISIN SEIKI E1 Series User Manual

138
CONTROL
2. Calculation of apparent engine speed
1) Calculation of required apparent engine speed (common to cooling and heating: every 30 seconds or when
changing the operation capacity)
Cooing : Lower pressure equivalent temperature control
Heating: High pressure equivalent temperature control
2) Calculation of apparent engine speed for upper limit avoidance
<Cooling> The control system sets the lowest engine speed among the following 3 speeds as apparent engine
speed for upper limit avoidance.
Compressor discharge pipe temperature avoidance: Engine speed is controlled so that the compressor
discharge pipe temperature does not exceed the upper limit.
Refrigerant high pressure avoidance: Engine speed is controlled so that the refrigerant high pressure does
not exceed the upper limit.
Engine coolant temperature avoidance: Engine speed is controlled so that the engine coolant temperature
does not exceed the upper limit.
<Heating> The control system sets the lowest engine speed among the following 4 speeds as apparent engine
speed for upper limit avoidance.
Compressor discharge pipe temperature avoidance: Engine speed is controlled so that the compressor
discharge pipe temperature does not exceed the upper limit.
Refrigerant high pressure avoidance: Engine speed is controlled so that the refrigerant high pressure does
not exceed the upper limit.
Low pressure avoidance: Engine speed is controlled so that the refrigerant low pressure is not below the
lower limit.
Engine coolant temperature avoidance: Engine speed is controlled so that the engine coolant temperature
does not exceed the upper limit.
3) Calculation of apparent engine speed for lower limit avoidance
<Cooling> Assuring refrigerant high-low pressure difference: Engine speed is controlled so that the difference
between refrigerant high and low pressure is not below the lower limit.
<Heating> Lower limit avoidance is not applied.
<< 15 TON Heating >>
Number of operating
compressors
Apparent engine
speed (rpm (min
-1
))
Engine speed (rpm (min
-1
))
(3Y)
Electromagnetic
compressor capacity
valve 1
Electromagnetic
compressor capacity
valve 2
2
2125 ERPMmax = 2125 OFF OFF
1500 1500 OFF OFF
1000 1000 OFF OFF
600 600 OFF OFF
550 700 ON OFF
500 650 ON OFF
450 600 ON OFF
400 700 ON ON
350 650 ON ON
300 ERPMmin = 600 ON ON
1 300 1200 ON OFF

AISIN SEIKI E1 Series Specifications

General

Brand	AISIN SEIKI
Model	E1 Series
Category	Air Conditioner
Language	English