Danfoss Icon2 Service Manual page 12

Service Manual Danfoss Icon2™
Application 01
2-pipe heating system with fixed
supply temperature control
Application description
Floor heating system with electronically controlled supply temperature.
The supply temperature is set to a fixed value. The system uses a PT1000 sensor
to detect and control the supply temperature. This sensor also ensures that the
maximum allowable supply temperature is not exceeded.
The pump and heat demand signal will activate whenever there is a heating demand
for at least one circuit. Both the pump (PWR1) and the heat demand signal (RELAY) are
set to have a switch-on delay of 3 minutes by default.
In PWM+ mode, the Danfoss Icon2™ makes use of automatic balancing. During periods
with a greater need for heat, this decreases the time spent 'on' for shorter pipes in small
rooms and prioritizes longer pipes in large rooms within the system. The process is
automatic and continuous. It ensures more efficient energy consumption and greater
comfort.
12 | © Copyright Danfoss Climate Solutions | 2023.01
Installer App settings
Function
PWM+ proportional control of actuator outputs
Heat pump optimizer – maintenance of minimum flow
PWR1 switch-on delay of 3 minutes
RELAY switch-on delay of 3 minutes
Safety temperature
Desired supply temperature
Required accessories
1 Mixing shunt FHM-C1 with circulation pump UPM3 15-70
2 Stainless steel floor heating manifold SSM-F, 2–12 groups
Set of 2 mounting brackets
Set of 2 ball valves 1"
3 Thermal actuator TWA-A 230V NC suitable for SSM-F manifold
4 PT1000 temperature sensor ESM-11
Thermal actuator TWA-A 24V NC suitable for mixing shunt
5
FHM-C1
Factory setting
Off On
50.0 °C
40.0 °C
088U0094
088U0752 to
088U0762
088U0585
088U0822
088H3112
087B1165
088H3110
AB432956914381en-010101