Domestic Hot Water Tank Installation Configuration; Initial Start-Up At Low Outdoor Ambient Temperatures; Pre-Operation Checks; Checks Before Initial Start-Up - Daikin EDLQ036BA6VJU1 Manuel D'installation

The following table summarizes the required configuration and wiring
at the terminal block (X2M: 1, 2, 4) in the switch box. Pump operation
is listed in the third column. The three last columns indicate whether
the following functionality is available on the user interface (UI) or
handled by the set point selection contacts SP1 and SP2:
• space heating or cooling on/off (y)
• heating/cooling changeover (=)
• heating and cooling schedule timers (pr)
Dual set point
Configuration Pump operation
• [7-02]=1 determined by
• SS2-3=OFF
leaving water
(a)
• wiring:
temperature
X2M
1 2 3 4
SP2 SP1
• [7-02]=1 on when main or/and
• SS2-3=ON sub set point is
• wiring:
requested
X2M
1 2 3 4
SP2 SP1
SP1 = First set point contact
SP2 = Second set point contact
(a) The pump will stop when space heating/cooling is turned off or when the water
reaches the desired water temperature as set on the user interface. With space
heating/cooling turned on, the pump will then run every 5 minutes during 3
minutes to check the water temperature.
Domestic hot water tank installation configuration
When no domestic hot water tank is
installed, toggle switch SS2-2 should be set to
OFF (default).
When a domestic hot water tank is installed,
toggle switch SS2-2 should be set to ON.
When SS2-3 was set to ON without all necessary and
correct wiring connections between indoor unit and
switchbox of the domestic hot water tank, the error code AC
will be displayed on the user interface.

Initial start-up at low outdoor ambient temperatures

During initial start-up and when water temperature is low, it is
important that the water is heated gradually. Failure to do so may
result in cracking of concrete floors due to rapid temperature change.
Please contact the responsible cast concrete building contractor for
further details.
To do so, the lowest leaving water set temperature can be decreased
to a value between 59°F (15°C) and 77°F (25°C) by adjusting the
field setting [9-01] (heating set point lower limit). Refer to "Field
settings" on page 25.
NOTE Heating between 59°F (15°C) and 77°F (25°C) is
performed by the backup heater only.
Installation manual
24
y y y y = = = = p p p p r r r r
UI UI UI
SP2/SP1 UI —
1 2 3 4
1 2 3 4

Pre-operation checks

Checks before initial start-up

DANGER
Switch off the power supply before making any
connections.
After the installation of the unit, check the following before switching
on the circuit breaker:
1 Field wiring
Make sure that the field wiring between local supply panel and
unit and valves (when applicable), unit and room thermostat
(when applicable), and unit and domestic hot water tank has
been carried out according to the instructions described in the
chapter "Field wiring" on page 17, according to the wiring
diagrams and according to local laws and regulations.
2 Fuses, circuit breakers, or protection devices
Check that the fuses or the locally installed protection devices
are of the size and type specified in the chapter "Technical
specifications" on page 40. Make sure that neither a fuse nor a
protection device has been bypassed.
3 Backup heater circuit breaker F1B/F3B
Do not forget to turn on the backup heater circuit breaker F2B in
the switchbox (F1B/F3B depends on the backup heater type).
Refer to the wiring diagram.
4 Booster heater circuit breaker F2B
Do not forget to turn on the booster heater circuit breaker F2B in
the switch box (applies only to units with optional domestic hot
water tank installed).
5 Ground wiring
Make sure that the ground wires have been connected properly
and that the ground terminals are tightened.
6 Internal wiring
Visually check the switch box on loose connections or damaged
electrical components.
7 Fixation
Check that the unit is properly fixed, to avoid abnormal noises
and vibrations when starting up the unit.
8 Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
9 Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak, call your local dealer.
10 Power supply voltage
Check the power supply voltage on the local supply panel. The
voltage must correspond to the voltage on the identification label
of the unit.
11 Air purge valve
Make sure the air purge valve is open (at least 2 turns).
12 Pressure relief valve
Check if the backup heater vessel is completely filled with water
by operating the pressure relief valve. It should purge water
instead of air.
NOTE Operating the system with the backup heater not
completely filled with water will damage the backup
heater!
13 Shut-off valves
Make sure that the shut-off valves are fully open.
Operating the system with closed valves will damage the
pump!
EDLQ036~054BA6VJU1 + EBLQ036~054BA6VJU1
Unit for air to water heat pump system
4PW56182-1