Daikin ERQ, Service Manual

Page: 13 / 260

ESIE09-05 Model Names of Outdoor Units, Control Box and Expansion Valve Kit
General Information 3
1.2 Control Box
Outlook
Types
We distinguish 3 types of control boxes:
„ EKEQD: Z-control
„
EKEQF: X,Y-control
„ EKEQM: Z-control (only with VRV outdoor unit, no ERQ)
Control type X
Control of air temperature (T
d
, T
s
or T
r
) 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
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