9
Fig. 4. Unit Wiring Diagram
~400 V
50 Hz
L1
L2
L3
PE
QF
L1
L2
L3
L1
L2
L3
X1
W2
V2
V1
U2
U1
W1
1
2
3
4
5
6
7
8
9
10
PE
TB1
TB1
TB2
TB2
TB1
TB2
where QF is the automatic switch (not included in the delivery
package);
X1 - terminal block;
TB1 and TB2 - thermal protection contacts of the motor.
~400 V
50 Hz
L1
L2
L3
PE
QF2
X2
1
2
3
4
5
6
7
8
1
2
3
4
L1
L2
L3
N
1
2
3
4
TS1/2
TS1/1
TS2/2
TS2/1
where QF2 is the automatic switch (not included in the delivery
package);
X2 - terminal block;
a) Unit Fan Electric Motor Wiring Diagram
b) Electric Heater Power Wiring Diagram
TECHNICAL MAINTENANCE
Maintenance operations of the unit are required 3-4 times per year. Maintenance includes regular
cleaning and the following operations:
1. Filter maintenance (3-4 times per year).
Dirty filters increase air resistance in the system and reduce supply air volume. The filters require
cleaning once in 3-4 months. Vacuum cleaning is allowed. Worn out filters should be replaced with the
new filters once or twice per year. Contact your local manufacturer representative for new filters. To
replace the filter:
1. Remove the cover.
2. Replace the filter.
3. Reinstall the cover.
2. Fan inspection (once per year).
Even in case of regular perform regular maintenance of the filter, some dust and grease can get
accumulated inside the fan and reduce the unit performance and supply air flow.
Clean the fan with a soft brush or cloth. No water and abrasive detergent, sharp objects or solvents
are allowed for cleaning to prevent the impeller damage.
3. Ductwork system inspection (once in 5 years).
Even if you follow all the listed maintenance guidelines, some dust can get accumulated inside the
air ducts and reduce the unit performance.
Duct maintenance means regular cleaning or replacements.
