Daikin ERQ Series Service Manual page 79

ERQ outdoor unit
The EKEQ(D/FA) control boxes can only be connected to an ERQ
outdoor unit in pair application. Only 1 expansion valve kit
EKEXV63~250 can be used per control box and per handling unit.
Outdoor
unit (class) EKEXV kit
100 EKEXV63~125
125 EKEXV63~140
140 EKEXV80~140
Depending on the heat exchanger, a connectable EKEXV (expansion
valve kit) must be selected to these limitations.
Allowed heat exchanger
cooling capacity (kW)
EKEXV
class Minimum Maximum
63 6.3 7.8
80 7.9 9.9
100 10.0 12.3
125 12.4 15.4
140 15.5 17.6
200 17.7 24.6
250 24.7 30.8
Cooling saturated suction temp.
(SST) = 6°C
Air temp. = 27°C DB/19°C WB
Superheat (SH) = 5 K
1 Selecting the condensing unit
Depending on necessary capacity of the combination an outdoor
unit needs to be selected (see "Engineering databook" for
capacity).
Each outdoor unit can be connected to a range of air
handling units.
The range is determined by the allowed expansion valve kits.
2 Selecting the expansion valve
The corresponding expansion valve needs to be selected for
your air handling unit. Select the expansion valve according to
the above limitations.
The expansion valve is an electronic type, it is
NOTE
controlled by the thermistors that are added in
the circuit. Each expansion valve can control a
range of air handling units sizes.
The selected air handling unit must be
designed for R410A.
Extraneous substances (including mineral oils
or moisture) must be prevented from getting
mixed into the system.
SST: saturated suction temperature at exit of
air handling unit.
3 Selecting the capacity setting adaptor (see accessories)
The corresponding capacity setting adaptor needs to be
selected depending on the expansion valve.
Connect the correct selected capacity setting adaptor to
X24A (A1P). (See figure 4 and figure 6).
EKEXV kit
63
80
100
125
140
200
250
Installation and operation manual
70
Outdoor
unit (class) EKEXV kit
200 EKEXV100~250
250 EKEXV125~250
Allowed heat exchanger
heating capacity (kW)
Minimum Maximum
7.1 8.8
8.9 11.1
11.2 13.8
13.9 17.3
17.4 19.8
19.9 27.7
27.8 34.7
Heating saturated suction temp.
(SST) = 46°C
Air temp. = 20°C DB
Subcool (SC) = 3 K
Capacity setting adaptor label
(indication)
J71
J90
J112
J140
J160
J224
J280
VRV IV range outdoor units
The EKEQFA control box can be connected to some types of VRV IV
outdoor unit (refer to the Engineering Data Book for outdoor units that
are in scope) with a maximum number of 3 connectable control boxes
to 1 system. 1 control box can be combined with 1 EKEXV kit. In this
configuation it is only allowed to connect air handling units. The
combination with VRV DX indoor units or other types of indoor units is
not allowed.
Depending on the air handling unit heat exchanger, a connectable
EKEXV (expansion valve kit) must be selected to following limitations.
Allowed heat exchanger
cooling capacity (kW)
EKEXV
class Minimum Maximum
63 6.3
80 7.9
100 10.0 12.3
125 12.4 15.4
140 15.5 17.6
200 17.7 24.6
250 24.7 30.8
400 35.4 49.5
500 49.6 61.6
Cooling saturated suction temp.
(SST) = 6°C
Air temp. = 27°C DB/19°C WB
Superheat (SH) = 5 K
1 The air handling unit can be considered as a standard VRV
indoor unit. The combinations of EKEXV kits (maximum 3) are
restricted by the connection ratio limitations: 90~110%.
Additional limits exist when connecting the EKEQFCBA
control box. These can be found in the Engineering Data
Book of the EKEQFCBA and in this manual.
2 Selecting the expansion valve
A corresponding expansion valve needs to be selected for your
air handling unit. Select the expansion valve according to the
above limitations.
The expansion valve (electronic type) is
NOTE
controlled by the thermistors that are added in
the circuit. Each expansion valve can control a
range of air handling units sizes.
The selected air handling unit must be
designed for R410A.
Extraneous substances (including mineral oils
or moisture) must be prevented from getting
mixed into the system.
SST: saturated suction temperature at exit of
air handling unit.
3 Selecting the capacity setting adaptor (see accessories)
The corresponding capacity setting adaptor needs to be
selected depending on the expansion valve.
Connect the correct selected capacity setting adaptor to
X24A (A1P). (See figure 4).
Capacity
setting adaptor
label
EKEXV kit (indication)
63 J71
80 J90
100 J112
125 J140
140 J160
Option kit for combination of Daikin condensing units
Allowed heat exchanger
heating capacity (kW)
Minimum Maximum
7.8 7.1 8.8
9.9 8.9 11.1
11.2 13.8
13.9 17.3
17.4 19.8
19.9 27.7
27.8 34.7
39.8 55.0
55.1 69.3
Heating saturated suction temp.
(SST) = 46°C
Air temp. = 20°C DB
Subcool (SC) = 3 K
Capacity
setting adaptor
label
EKEXV kit (indication)
200 J224
250 J280
400 J22
500 J28
EKEQFCBAV3 + EKEQDCBV3
with field supplied air handling units
4P383212-1 - 2014.08