Daikin ERQ Series, Service Manual

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ESiEN09-06 A Model Names of Outdoor Unit, Control Box and Expansion Valve Kit
General Information 3
1.2 Control Box
Outlook
Model name We distinguish 3 types of control boxes:
EKEQD: Z-control
EKEQF: W-, X-,Y-control
EKEQM: Z-control (only with VRV outdoor unit, no ERQ)
Control type W
Control of capacity by means of external device (DDC controller).
Control type X
Control of refrigerant temperature by means of external device (DDC controller).
Control type Y
Control of evaporation and condensing temperature (T
e
, T
c
) by Daikin control (no DDC needed).
Control type Z
Control of air temperature (T
s
or T
r
) by Daikin control (no DDC needed).
Legend:
T
d
Discharge air control
T
s
Suction air control
T
r
Room air control
T
e
Evaporating temperature control
T
c
Condensing temperature control
AHU Air handling unit
DDC Digital controller