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2018-02-13
Climatix HERU® 400-2400
CONTROL SYSTEM Function description
Extract air regulation (cascade control)
Can be selected in HMI. Temperature sensor GT2 becomes main sensor and
temperature sensor GT1 becomes sensor for supply air limit according to set value in
HMI.
Cascade control in combination with supply air regulation [Ext air SuWi] Selectable in
HMI: switching between extract air regulation and supply air regulation according to
outside temperature or annual calendar, or digital input (summer/winter changeover).
Different setpoints apply for cascade control and supply air regulation.
If room sensor GTR is used, room regulation in combination with supply air is also
selectable [Room SuWi].
Outside-compensated temperature regulation
Selected in HMI. Temperature is shifted via 4 breakpoints, according to adjustable
value, from [start point] to [end point] according to
[ΔK]
for summer/winter.
Fan compensation (fan boost/fan reduction)
Selected in HMI. Possible to compensate for fan via outside temperature, room
temperature GTR, air quality GQ1 and moisture GM1. All of the different fan
compensations will be added to the total fan compensation value.
Temperature exercise
Used for support heating and/or cooling or night cooling when there is no room
temperature sensor.
Temperature exercise ramps/starts up the unit after an extended period of inactivity
(switched off) and updates the duct
sensor’s
extract air temperature.
Support operation
Selected in HMI. Selectable
heating, cooling or heating & cooling.
Temperature regulation
support heating
when unit stopped (night time), as follows:
1. Heat exchanger
2. Heating coil in sequence according to specified order.
Support cooling with cooling coil.
Night cooling (summer night cooling)
Selected in HMI. Night cooling starts automatically to cool premises at night with cool
fresh air.
Heat exchanger, heating coil and cooling coil are blocked during night cooling.
Conditions for automatic start:
–
Time switch program must be in OFF mode.
–
Outside temperature must be higher than MIN outside temperature.
–
Outside temperature must be lower than the difference between the room/extract
air temperature.
-(minus)
Δ
[1K].
–
Room/extract air temperature is higher than room/extract air setpoint.
Night cooling is cancelled if the timer input is enabled, or if the above conditions cease
during operation.
PROTECTION
Frost protection
At low return temperature GT8 in the heating coil, the heating valve SV1 will be
overridden (open more than the heating requirement demands), according to set
value in HMI. If the temperature continues to decrease, an alarm will go off and the
unit will stop. When the unit stops, the coil will maintain heat according to set value.
Frost protection sensor is reset in HMI.
Summary of Contents for HERU 400-2400 S
Page 1: ...U S E R M A N U A L E N H E R U 4 0 0 2 4 0 0 T S HERU T HERU S...
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Page 14: ...14 120 Climatix HERU 400 2400 2018 02 13 Scope of assembly installation instructions...
Page 45: ...45 120 2018 02 13 Climatix HERU 400 2400 External components basic unit...
Page 97: ...97 120 2018 02 13 Climatix HERU 400 2400 Miscellaneous Menu structure Menu overview...
Page 98: ...98 120 Climatix HERU 400 2400 2018 02 13 Miscellaneous Start page Main index Unit...
Page 104: ...104 120 Climatix HERU 400 2400 2018 02 13 SERVICE HERU...
Page 111: ...111 120 2018 02 13 Climatix HERU 400 2400 SERVICE HERU...
Page 118: ...118 120 2017 11 03 Climatix HERU 400 2400 Troubleshooting...
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