Daikin VRV - WII, Service Manual

Page: 81 / 312

Normal Control SiUS30-604
68 Function
5.3 Heat Exchange Mode in Heating Operation or
Simultaneous Cooling / Heating Operation
In heating or simultaneous cooling / heating operation, a target condensing and evaporating
temperature can be secured by switching the water heat exchanger of the outside unit into
evaporator or condenser with load.
One outside unit installation
Two outside units installation
∆
GR>0
∆
GR <0
∆
GR<0
∆
GR>0
Master unit
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
Master unit
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
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.
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
Master unit
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
0 pulse
Master unit
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
Master unit
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
0 pulse
Master unit
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
∆
GR>0
∆
GR <0
∆
GR>0
∆
GR <0
∆
GR>0
∆
GR <0