Klimor EVO -T, Operation And Maintenance Manual, Page: 63 / 164

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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)
Temper
atur
e adjustmen
t
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
Hea
ting
Water heater
Master adjustment sensor tem-
perature is below the set tem-
perature
- Increasing the medium (water or glycol solution) flow 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) flow 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)
Ener
gy
rec
ov
er
y syst
ems
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-flow 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
difference 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