Specifications

Si30-813 Normal Control
Function 75
Three outside units installation
∆GR<0
∆GR>0
Master unit
Master unit
Master unit
Master unit
Master unit
Master unit
Master unit
Master unit
OFF
(Condenser)
Slave unit 1
OFF
(Condenser)
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Control of heat exchange
capacity balance
Control of heat exchange
capacity balance
Slave unit 2
OFF
(Condenser)
Control of heat exchange
capacity balance
∆GR>0 ∆GR<0
OFF
(Condenser)
Slave unit 1
OFF
(Condenser)
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Control of heat exchange
capacity balance
Control of heat exchange
capacity balance
Slave unit 2
OFF
(Condenser)
0 pulse
∆GR>0 ∆GR<0
OFF
(Condenser)
Slave unit 1
ON
(Evaporator)
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Control of heat exchange
capacity balance
Slave unit 2
ON
(Evaporator)
∆GR>0 ∆GR<0
OFF
(Condenser)
Slave unit 1
ON
(Evaporator)
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Control of heat exchange
capacity balance
Control of heat exchange
capacity balance
Slave unit 2
ON
(Evaporator)
∆GR>0 ∆GR<0
OFF
(Condenser)
Slave unit 1
ON
(Evaporator)
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Control of heat exchange
capacity balance
Control of heat exchange
capacity balance
Slave unit 2
ON
(Evaporator)
Control of heat exchange
capacity balance
ON
(Evaporator)
Slave unit 1
OFF
(Condenser)
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Control of heat exchange
capacity balance
Slave unit 2
OFF
(Condenser)
∆GR>0 ∆GR<0
ON
(Evaporator)
Slave unit 1
ON
(Evaporator)
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Control of heat exchange
capacity balance
Control of heat exchange
capacity balance
Slave unit 2
ON
(Evaporator)
∆GR>0 ∆GR<0
ON
(Evaporator)
Slave unit 1
ON
(Evaporator)
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Control of heat exchange
capacity balance
Control of heat exchange
capacity balance
Slave unit 2
ON
(Evaporator)
Control of heat exchange
capacity balance
Note 1: ∆GR=Target of heat exchange
capacity balance – Actual
measurement of heat
balance
 ∆GR>0: Insufficient evaporation
(Excessive condensation)
 ∆GR<0: Insufficient condensation
(Excessive evaporation)
2: Control of heat exchange capacity
balance
Control the electronic expansion
valve so that Te or Tc will obtain
the target value.
0 pulse
0 pulse
0 pulse
0 pulse
0 pulse0 pulse