108
EVO-S, EVO-H
MODULAR AIR HANDLING UNITS
OPERATION AND MAINTENANCE MANUAL
8. List of most common faults
Table 30
List of most common faults in the units
Item Unit
Signs of malfunctioning of
the unit
Cause
Removal
1.
Filtering and mixing
section
insufficient airflow
excessive pollution of the pre-filter or fine filter
cleaning or replacement
housing leakage
tighten clamps on the covers
2.
Fan section
insufficient airflow
damage to the flexible fan stub
apply a patch by sticking or replace with a new one
airflow stop
motor damage
removal of damage or replacement with a new one
no power supply to the motor
damage repair on the dashboard or on the power cord
closing of the air damper
repair of the damage
increased noise
damage to the fan or motor bearing
replacement
mechanical damage to the rotor
damage repair or replacement
loosening of screw connections
tightening nuts and bolts
increased vibrations
damage to dampers
replacement
loose rotor at the shaft
fix the failure or replace with a new one
3.
DX cooling section
air temperature at the unit's outlet
too high
wrongly adjusted thermostatic valve (too little cooling
medium is supplied to the cooler)
perform appropriate adjustment
dirty filter on the DX cooler power supply
clean the filter insert or replace it with a new one
defective thermostatic valve or control valve
replace the valve with a new one
air cooler oiling
remove oil from the cooler by reducing overheating
airlocked cooler intake water temperature too low
vent the cooler, check the cause of low water temperature
frosting the cooler
medium evaporation temperature too low
increase the temperature of medium evaporation
Freon leakage
leaks on screwed or welded joints
locate the leakage point and seal it
4.
Cooling section
outlet air temperature too high
not enough water is fed to the cooler
change the setting of the thermostat valve regulator to the
correct one
water supply pressure too low for the cooler
check the position of the fully open shut-off valves on
the supply line
airlocked cooler
check the position of the fully open shut-off valves on the
outlet line vent the cooler,
air temperature at the unit's outlet
too low
Too much water is fed to the cooler
change valve regulator thermostat to the correct setting
5.
Heating section
Too low air temperature at
the outlet
Not enough water delivered to the heater
adjust the thermostatic valve setting
Too low pressure of water delivered to the heater
check position of the fully open cut-off valves at the
supply pipe
Too high air temperature at the
AHU outlet
Air in the heater (water heater)
check position of the fully open cut-off valves at the outlet
pipe and bleed the heater
Too much water delivered to the heater
ajust the thermostatic valve setting
6.
Humidification
section
air humidity at the unit's outlet
too low
too little steam or water supply through the humidifier
check the patency of the nozzles and clean them
water supply pressure too low
check the operation of the electromagnetic valve or check
the operation of the control valve; reduce pressure on
the reduction valve check the reason for water supply
pressure being too low
check the operation of electric steam generator
outlet air temperature too high
too much steam or water supply through the humidifier
reduce water supply pressure
check the operation of electric steam generator
7.
Damping and
separation section
no possibility to control the
temperature and humidity of the
air leaving the air handling unit
thermometer damage
replace with a new one
malfunction of the hygrostat
perform the adjustment according to the instructions or
replace with a new one
NOTE:
ALL WORKS RELATED TO REPAIR AND ADJUSTMENT OF THE AIR HANDLING UNIT POWER SUPPLY SYSTEMS SHOULD
BE PERFORMED IN ACCORDANCE WITH THE OPERATING MANUAL OF THE ENTIRE AIR CONDITIONING SYSTEM.
Summary of Contents for EVO - H
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Page 127: ...125 14 11 12 13 3 2 15 16 15 16 17 17 18 18 RR OMM KL RR ASM GUILS Klimor...
Page 130: ...128 EVO S EVO H 25 26 c 200x200 300x200 27 27 d 0230 0090 300x200 28 28 0230 0090...
Page 132: ...130 EVO S EVO H 2900 a 50 31 b 150 32 c 33 2900 b c...
Page 141: ...139 43 8 1200 600 230 50 36 310 x 230 x 125 4 3 2 E G4 ISO COARSE 60 6...
Page 142: ...140 EVO S EVO H 44 45 46 100 C 47 48 49...
Page 143: ...141 4 3 3 SR 50 230 50 60 CA 1 2 CG 3 2 CG 3 1 CA 4 3 4 52 51...
Page 144: ...142 EVO S EVO H 53 54 55 4...
Page 145: ...143 56 4 3 5 G4 ISO COARSE 60 6 57 57 58 INOX 2 3 Power supply LED C 3x2 5 2x2 5 C 2x1 5...
Page 146: ...144 EVO S EVO H 59 60 C 4 4 WH CuAl 4 8 1 4 5 EH 60 4 5 1 4...
Page 149: ...147 62 3 5 4 5 6 7 63 8 4 9 64 63 64 4 7 2 12 5 5...
Page 157: ...155 150 4 12 1 CPR PR 6 12 50 0 C 4 13 RG 55 76 Cu Al Cu Al 23 DN63 PN Klimor Klimor 230 50...
Page 167: ...165 4 14 2 3 4 14 3 Klimor 5 6 6 1 KT 8 100 C...
Page 168: ...166 EVO S EVO H 7 12 PN EN 13779 2008 12 2000 24 4000 24 4000 3 6 12 30 C 130 C 4...
Page 169: ...167 8 30 1 2 3 DX 4 5 6 7...
Page 171: ...169 10 KLIMOR EVO KLIMOR EVO a b 10 10 c IP54 d c e 83 84 f IP65 85 86 32 A 50 0 1 1...
Page 173: ...171 11 7 11 8 11 9 91 11 10 DIN 1946 4 DIN 1946 4 DIN 1946 4 DIN 1946 4 3 I 2 4 0 8 80 20 1...
Page 174: ...172 EVO S EVO H 11 11 m in HEPA...
Page 175: ...173 m in HEPA EN ISO 14644 1 3...
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