Klimor EVO -T - 5 Description of System Operation

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5. DESCRIPTION OF SYSTEM OPERATION
Table no. 7 Functions of AHU systems
Function Actuation condition Description of operation
Fan start
Set the operation mode
Speed 1, Speed 2, Standby, Timer
- External dampers open
- Turning on the air supply fan’s motor (air supply AHUs) or air supply/exhaust fans’ motors (air supply/exhaust AHUs)
Temperature adjustment
Description
Set the operation mode
Speed 1, Speed 2, Standby, Timer
- Comparison of current temperature measured with the master sensor with the set value entered in the control-
ler as well as actuation of heat/cool exchangers
- Limiting of min and max temperature of supply air
Heating
Water heater
Master adjustment sensor tem-
perature is below the set tem-
perature
- Increasing the medium (water or glycol solution) ow rate through the water heating coil
- Activation of anti-frost function if the temperature downstream the heater (thermostat) is too low
Electric heater
- Stepless power increase of the electric heater
- Cooling down the heater while switching from run into stop mode
- Monitoring of heater overheating with the thermostat
Cooling
Water cooling
coil
Master adjustment sensor tempe-
rature is above the set temperature
- Increasing the medium (water or glycol solution) ow rate through the cooler
DX cooling coil
- Switching on the 1st, 2nd stage of the compressor unit
- Cooling system initiation lock applied at low external temperatures (factory setting: 13°C)
- Min. time of compressor operation (even if the initiation signal is not fed) and min break time (even if the
initiation signal is fed)
Energy
recovery systems
Heat recovery
Set the operation mode
Speed 1, Speed 2, Standby,Timer
External temperature is 1K lower
than air exhaust sensor tempe-
rature
- Initiation of the recovery system (START/STOP)
- Activation of anti-frost function of the heat recovery system at low air exhaust temperature, downstream the
heat recovery (cross-ow heat recovery – closing)
Recirculation chamber
Set the operation mode
Speed 1, Speed 2, Standby, Timer
Operation in the heating sequence
- Stepless adjustment of air dampers’ opening using the actuators
- Mixing degree of the air extracted from the room with the external supplied air depends on the temperature
dierence measured with the air exhaust sensor and the set temperature
- Adjustment of air mixing degree is carried out before or after the adjustment of cooling and heating devices,
depending on the priority setting for the mixing chamber or heater/cooler
- Activation of reheating function possible: if the ambient temperature is below the set temperature, the system
switches into the heating sequence, the AHUs with recirculation will operate with minimal amount of fresh air (factory
setting: min 30% external air damper opening), then the controller starts to adjust the temperature using the heater
- Manual setting possible