Pump Operation Configuration; Domestic Hot Water Tank Installation Configuration; Initial Start-Up At Low Outdoor Ambient Temperatures; Pre-Operation Checks - Daikin Altherna Serie Manual De Instalación

The following table summarizes the required configuration and
thermostat wiring at the terminal block 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 thermostat (T):
• space heating or cooling on/off (y)
• heating/cooling changeover (=)
• heating and cooling schedule timers (pr)
Thermostat Configuration
No thermostat • SS2-3 = OFF
• wiring: (non)
X2M
H C L N
1 2 3 4
• SS2-3 = ON
• wiring:
X2M
H C L N
1 2 3 4
Heating only • SS2-3 = ON
thermostat • wiring:
X2M
H C L N
1 2 3 4
th
Thermostat with • SS2-3 = ON
heating/cooling • wiring:
switch
X2M
H C L N
1 2 3 4
H C
th
th =
C =
H =
L, N =
(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.
Pump operation configuration
NOTE
To set the pump speed, refer to "Setting the pump
speed" on page 20.
Without room thermostat
When no thermostat is connected to the unit, pump operation will be
determined by the leaving water temperature.
To force continuous pump operation when no room thermostat is
connected do the following:
- set toggle switch SS2-3 to ON,
- short-circuit the terminal numbers 1-2-4 on the terminal block
in the switch box.
With room thermostat
When a thermostat is connected to the unit, the pump will operate
continuously whenever there is heating or cooling demand requested
by the thermostat.
Installation manual
19
Pump
y y y y = = = = p p p p r r r r
operation
determined by UI UI UI
leaving water
(a)
temperature
on when space UI UI UI
heating or
cooling is on
(y)
on when T — —
heating
request by
room
thermostat
on when T T —
heating
request or
cooling request
by room
thermostat
Thermostat contact
Cooling contact
Heating contact
230 V AC
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.

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 15°C and 25°C by adjusting the field setting
[9-01] (heating set point lower limit). Refer to "Field settings" on
page 20.
NOTE Heating between 15°C and 25°C is performed by the
backup heater only.

Pre-operation checks

Checks before initial start-up

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 12, according to the wiring
diagrams and according to European and national regulations.
2 Fuses 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 32. Make sure that neither a fuse nor a
protection device has been bypassed.
3 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).
4 Earth wiring
Make sure that the earth wires have been connected properly
and that the earth terminals are tightened.
5 Internal wiring
Visually check the switch box on loose connections or damaged
electrical components.
6 Fixation
Check that the unit is properly fixed, to avoid abnormal noises
and vibrations when starting up the unit.
7 Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
1 2 3 4
1 2 3 4
E(D/B)(H/L)Q011~016AA6V3+W1
Unit for air to water heat pump system
4PW51121-1A