O
F
F
O
N
O
F
F
O
N
1
X2M
2
X2M
3
SP2 =
4
■
6
8
9
10
11
12
NOTE
The following table summarizes the required configuration and wiring
at the terminal block (X2M: 1, 2, 4) in the switch box. Pump operation
Pre-operation checks
is listed in the third column. The three last columns indicate whether
the following functionality is available on the user interface (UI) or
Checks before initial start-up
handled by the set point selection contacts SP1 and SP2:
· space heating or cooling on/off (y)
DANGER
· heating/cooling changeover (=)
· heating and cooling schedule timers (pr)
Switch off the
connections.
power supply before making any
Configuration
Dual set point
Pump operation
y
=
pr
After the installation of the unit, check the following before switching
on the circuit breaker:
· [7-02]=1
· SS2-3=OFF
· wiring:
determined by
leaving water
temperature
(a)
UI
UI
UI
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
1 2 3 4
been carried out according to the instructions described in the
SP2
SP1
chapter "Field wiring" on page 17, according to the wiring
· [7-02]=1
on when main or/and
SP2/SP1
UI
—
diagrams and according to local laws and regulations.
· SS2-3=ON
· wiring:
sub set point is
requested
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
1 2 3 4
specifications" on page 40. Make sure that neither a fuse nor a
SP2
SP1
protection device has been bypassed.
SP1 =
First set point contact
Backup heater circuit breaker F1B/F3B
Second set point contact
Do not forget to turn on the backup heater circuit breaker F2B in
(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
the switchbox (F1B/F3B depends on the backup heater type).
Refer to the wiring diagram.
minutes to check the water temperature.
Booster heater circuit breaker F2B
Domestic hot water tank installation configuration
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).
■
When
no domestic hot water tank
is
1 2
3 4
5
Ground wiring
installed, toggle switch SS2-2 should be set to
Make sure that the ground wires have been connected properly
OFF
(default).
and that the ground terminals are tightened.
When a
domestic hot water tank
is installed,
1 2
3 4
Internal wiring
Visually check the switch box on loose connections or damaged
toggle switch SS2-2 should be set to
ON.
electrical components.
7
Fixation
When SS2-3 was set to ON without all necessary and
Check that the unit is properly fixed, to avoid abnormal noises
correct wiring connections between indoor unit and
and vibrations when starting up the unit.
switchbox of the domestic hot water tank, the error code
AC
will be displayed on the user interface.
Damaged equipment
Check the inside of the unit on damaged components or
Initial start-up at low outdoor ambient temperatures
squeezed pipes.
Refrigerant leak
During initial start-up and when water temperature is low, it is
Check the inside of the unit on refrigerant leakage. If there is a
important that the water is heated gradually. Failure to do so may
refrigerant leak, call your local dealer.
result in cracking of concrete floors due to rapid temperature change.
Please contact the responsible cast concrete building contractor for
Power supply voltage
further details.
Check the power supply voltage on the local supply panel. The
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
voltage must correspond to the voltage on the identification label
of the unit.
field setting [9-01] (heating set point lower limit). Refer to "Field
Air purge valve
settings" on page 25.
Make sure the air purge valve is open (at least 2 turns).
NOTE
Heating between 59°F (15°C) and 77°F (25°C) is
Pressure relief valve
performed by the backup heater only.
Check if the backup heater vessel is completely filled with water
by operating the pressure relief valve. It should purge water
instead of air.
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!
Installation manual
EDLQ036~054B EBLQ036~054BA6VJU1
24
Unit for air to water heat pump system
4PW56182-1
