E(D/B)(H/L)Q011~016BB
Unit for air to water heat pump system
4PW67904-1 – 01.2011
Installation manual
30
10.4. Domestic hot water tank installation
configuration
As mentioned in
"Domestic hot water tank (option)" on page 3
, 2
types of domestic hot water tanks are available:
■
tank with built-in electrical booster heater (EKHW*)([4-03]
default value will be 3),
■
tank without electrical booster heater (EKHTS)([4-03] default
value will be 5).
10.5. 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
"10.10. Field settings"
on page 32
.
10.6. Pre-operation checks
Checks before initial start-up
After the installation of the unit, check the following before switching
on the circuit breaker:
1
Installation
Check that the unit is properly installed to avoid abnormal noises
and vibrations when starting the unit.
2
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
"9. Electrical wiring work" on page 20
, according to the
wiring diagrams and according to the applicable legislation.
3
Fuses or protection devices
Check that the fuses or the locally installed protection devices
are of the size and type specified in the chapter
"14. Technical
specifications" on page 54
. Make sure that neither a fuse nor a
protection device has been bypassed.
4
Backup heater circuit breaker F1B/F3B
Do not forget to turn on the backup heater circuit breaker F2B in
the switch box (F1B/F3B depends on the backup heater type).
Refer to the wiring diagram.
5
Booster heater circuit breaker F2B
(1)
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).
6
Earth wiring
Make sure that the earth wires have been connected properly
and that the earth terminals are tightened.
7
Internal wiring
Visually check the switch box on loose connections or damaged
electrical components.
8
Fixation
Check that the unit is properly fixed, to avoid abnormal noises
and vibrations when starting up the unit.
9
Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
10
Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak, call your local dealer.
11
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.
12
Pipe size and pipe insulation
Be sure that correct pipe sizes are installed and that the
insulation work is properly executed.
13
Stop valves
Make sure that the stop valves on the unit (gas and liquid) are
fully open.
14
Air purge valve
Make sure the air purge valve is open (at least 2 turns).
■
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.
NOTICE
For correct operation of the system, it is very important to
make the correct and complete wiring connections
between the unit and switch box
(a)
of the domestic hot
water tank before setting SS2-2 to ON.
The applicable logic and settings (example [4-03] default)
are activated according to the connected tank. See
"[4] Backup/booster heater operation and space heating
off temperature" on page 34
for more details.
(a) Only applicable for tank with built-in electrical booster heater (EKHW*).
INFORMATION
If leaving water temperature is set between 15°C and
25°C, heating is performed by the backup heater only.
INFORMATION
The function underfloor heating screed dry-out program
offers the possibility to execute automatically the gradual
heat up. See
"11.5. Underfloor heating screed dry-out
program" on page 49
.
4
3
2
1
ON
OFF
4
3
2
1
ON
OFF
DANGER
Switch off all relevant power supply before making any
connections.
(1) Only applicable for tank with built-in electrical booster heater (EKHW*).
