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Installation and Operating Instructions Ahti & Ukko
The time switch (4+8 h) is also the heater’s main switch. After a set time, the time switch automatically
switches the heater off. With the timer function, the heater can be set to switch on in 1–8 hours. The
maximum warm-up time is 4 hours.
For example:
If you want the sauna to be ready as soon as possible, set the time switch between 1 and 4. The
heater switches on immediately and begins to warm up. Set the desired temperature by turning the
thermostat.
If you want the sauna to be ready in three hours, turn the timer to 2 on the time switch scale of 1–8.
The timer starts and the power will be switched on and the heater will start warming up after two
hours. When the power has been switched on, the heater will remain on for a maximum of 4 hours.
After that, the power will be switched off automatically. You can switch the power off sooner by turning
the time switch to zero (0).
Always make sure that the time switch has switched the power off after the set time period!
8. Time switch and thermostat operation
Additional connection options
Connecting a signal light outside the sauna room
The connection cable used should be, for example, the H07RN-F cable with a cross-sectional area the
same as that of the connection cable.
Control of electric heating with the heater
The electric heating control cable is brought directly to the heater’s junction box and further to the
heater’s terminal block with a rubber cable that is dimensionally identical to the incoming cable.
Time switch
Overheat protector reset
switch
Thermostat