EnaSolar immerSUN Installation And User Manual page 37

Underfloor Heating – Option 1
Electric underfloor heating (UFH) can usually be used with the immerSUN.
This wiring diagram assumes that the UFH is to be used alongside another
heater (most likely an immersion heater). However the UFH system can be
used as the only heater by wiring to the Heater 1 output.
The UFH thermostat is wired so that the External Boost sees a voltage
when the thermostat is closed. The UFH mat is connected directly to
Heater 2 output.
The External Boost input is used in 'thermostat' mode so that the Heater 2
output is active only when the UFH thermostat is calling for heat.
By utilising this wiring and configuration, the thermostat could be of any
type, since it is only providing a signal input to the immerSUN, and does
not form any part of the immerSUN variable voltage output circuitry.
Important!
● Maximum load: 3.2KW (each heater)
● Minimum load: 150W (each heater)
● Recommended cable size: 2.5mm²
● Must be a simple resistive load without electronic controls
Settings
Heater 1 Type: Set to match the load
Heater 2 Type: Underfloor Heating (resistive load only)
Heater 3 Type: Disabled
Relay Function: Not used
External Boost: Heater Thermostat: Heater 2
Tips and Ideas
● Smaller loads can be connected in parallel as long as the maximum
load is not exceeded.
● The immerSUN has built-in timers that can replace any timers that
have been removed.
● The Multifunction Relay is free to use to control other devices.
37