© 2018 OJ Electronics A/S
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INSTRUCTIONS Commissioning guide for AHC-3000
20.2 Heating coil settings (water coil)
Available settings
Setpoint
√ Current setpoint for the current temperature control mode
√ Setting range is 5.0–40.0°C
Current
√ Current supply air temperature
Flow supply
√ Current supply air flow (m3/h)
Heating
√ Current status value of the heating output (range 0–100%)
Heating relay 1, 2 & 3
√ Current status of the relay output
Start-up heating
√ During the start-up sequence of the AHU, the heating valve will override the set value. The
override of the heating valve stops when the start-up sequence is completed and the inlet fan
has reached its air volume setpoint.
Frost protection
√ During normal operation of the AHU, the return sensor on the heating coil will ensure that the
return flow from the water coil does not fall below the set value in this parameter.
Standby heating
√ When the AHU is in stop/standby mode, the return sensor on the heating coil will ensure that
the return flow from the water coil does not fall below the set value in this parameter.
Frost alarm
√ Setpoint for frost alarm. At temperatures below the setpoint, the AHU will stop, the pump will
start, the heating valve will be overridden to 100% open and an “A” alarm will be triggered.
Water temperature
√ Current temperature on the return pipe sensor.
