Daikin ERQ Series, Service Manual

Page: 87 / 153

Installation and operation manual
78
EKEQ EKEQDCBV3
Option kit for combination of Daikin condensing units
with field supplied air handling units
4P383212-1 - 2014.08
Installation of longer thermistor cable (R1T/R2T/R3T)
The thermistor is supplied with a standard cable of 2.5 m. This cable
can be made longer to up to 20 m.
Install the longer thermistor cable with the delivered wire to wire
splices
1 Cut the wire or bundle the remainder of the thermistor cable.
Keep at least 1 m of the original thermistor cable.
Do not bundle the cable inside the control box.
2 Strip the wire ±7 mm at both ends and insert these ends into the
wire to wire splice.
3 Pinch the splice with the correct crimp tool (pliers).
4 After connection, heat up the shrink-insulation of the wire to wire
splice with a shrink-heater to make a water tight connection.
5 Wrap electrical insulation tape around the connection.
6 Put a pull-relief in front of and behind the connection.
T
EST OPERATION
After installation and once the field settings are defined, the installer
is obliged to verify correct operation by performing a test run. Refer to
the installation manual of the outdoor unit. Before executing "test run"
as well as before operating the unit, you must check the following:
Refer to the section of "VRV IV range outdoor units" on page 70.
After finishing the construction of refrigerant piping, drain piping
and electric wiring, conduct test operation accordingly to protect
the unit.
Open the gas side stop valve.
Open the liquid side stop valve.
Additional the test operation
When the test run was succesful, an additional check needs to be
carried out during normal operation
1 Close the contact T1/T2 (ON/OFF).
2 Confirm function of the unit according to the manual and check if
the air handling unit has collected ice (freeze-up).
If the unit collects ice: see "Troubleshooting" on page 81.
3 Confirm that the fan of the air handling unit is ON.
O
PERATION AND MAINTENANCE
If T1/T2 is used to control the operation of the air handling unit, the
following convention is used:
Closing the T1/T2 signal starts operation of the air handling unit.
Opening the T1/T2 signal stops operation of the air handling
unit.
W
HAT TO DO BEFORE OPERATION
Field settings for EKEQDCB
Refer to the installation and service manuals of both the outdoor unit
and the remote controller.
Field settings for EKEQFCBA
When changing the settings:
1 Make the required settings with the remote controller.
2 Turn power OFF after all required settings have been made.
3 Remove the remote controller after servicing and test run.
Operating the remote controller may disturb the normal
operation of the system.
4 Do not change T1/T2 during power failure.
5 Put power of indoor and outdoor unit ON.
Setting the temperature control system
T
e
or SST = evaporating temperature or saturated suction
temperature.
T
c
= condensing temperature.
The connection must be made on an accessible
location.
To make the connection waterproof, the connection
can also be made in a switch box or connector box.
The thermistor cable should be located at least
50 mm away from power supply wire. Not following
this guideline may result in malfunction due to
electrical noise.
In case of poor distribution in the air handling unit, 1 or
more passes of the air handling unit may freeze-up
(collect ice)
put the thermistor (R2T) on this
position.
Depending on operation conditions (e.g.: outdoor
ambient temperature) it is possible that the settings
must be changed after commissioning.
Before initiating operation, contact your dealer to get
the operation manual that corresponds to your
system.
Refer to the dedicated manual of the controller (field
supply) and air handling unit (field supply).
Make sure that the air handling unit fan is ON when
the outdoor unit is in normal operation.
Mode No. Code No. Description of setting
23(13)–0
01
Operation with 0–10 V capacity
control (= factory setting)
X-control
02
Operation with fixed T
e
/T
c
temperature control
Y-control
03
Operation with 0–10 V capacity
control
W-control