CLIVET WSAN-YMi 21, Manual For Installation, Use And Maintenance, Page: 73 / 156

73
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 concrete floors cracking due to rapid temperature change. Please contact the responsible cast concrete building contractor for
further details.
To do so, the lowest water flow set temperature can be decreased to a value between 25°C and 35°C by adjusting the FOR
SERVICEMAN - SPECIAL FUNCTION - PREHEATING FOR FLOOR
Pre-operation checks
Checks before initial start-up.
Maximum operating current setting
DIP switch is located on the main board.
If the user configuration load is small, please select the dial code type according to the actual load.
This function is only for single-phase models (Three phase model this function reservation)
WARNING
Switch off the power supply before opening the switch box service panel and making any changes to the DIP switch settings.
If you choose to reduce the maximum current operation, the machine effect will be affected by different levels.
DIP switch 5/7/9kW
(1-phase)
SW3
12/14/16kW
(1-phase)
SW4
DIP switch
5/7/9kW
(1-phase)
SW3
12/14/16kW
(1-phase)
SW4
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:
•
Field wiring
：
Make sure that the field wiring between the local supply panel and unit and valves (when applicable), unit and room thermostat
(when applicable), unit and domestic hot water tank, and unit and backup heater kit have been connected according to the
instructions described in the chapter Electrical connections, according to the wiring diagrams and to local laws and regulations.
•
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 page 56,57 on the chapter
Electrical connections.
Make sure that no fuses or protection devices have been bypassed.
•
Backup heater circuit breaker
：
Do not forget to turn on the backup heater circuit breaker in the switchbox (it depends on the backup heater type).
Refer to the wiring diagram.
•
Booster heater circuit breaker
：
Do not forget to turn on the booster heater circuit breaker (applies only to units with optional
domestic hot water tank installed).