Salda Smarty 4X V User manual

Subject to technical modication
Smarty 4X V_P0115_AZ_0002
AHU WITH HEAT RECOVERY
Smarty 4X V
User‘s and service technical manual

2
Smarty 4X V
www.salda.lt
Symbols 3
Marking 3
Transportation and storage 3
Unpacking 4
Standard package of components 4
Safety precautions 4
Description 4
Components 5
Operating conditions 5
Maintenance 6
Cover opening 6
Filters maintenance 6
Fans maintenance 6
Heat exchanger maintenance 8
Bypass Dampers and Pre-Heater maintenance 8
Control board maintenance 9
Switching Power Supply maintenance 9
Recommendations for Installation of Unit Functional
Blocks 9
Wiring Diagram 10
Air ow 10
Smarty 4X V connection possibilities 11
Technical data 11
Filter 11
Air ow Diagrams 12
Smarty 4X V dimensions 13
Mounting 14
Mounting on wall 14
Mounting on Legs 14
Connection of the unit to electric network 15
Drainage 16
Control Board and its Functions 16
Descriptions of Unit Functions 17
1.1 System modes 17
1.2 System Control 17
1.3 System status 17
1.4 Indications of Functions, Alarms and Warnings 18
1.5 Setting Date and Time 18
1.6 Weekly Schedule 18
1.7 Holiday Schedule 18
1.8 Winter/Summer Mode 18
1.9 “BOOST” Function 19
1.10 Protection against Dryness 19
1.11 Night Cooling Function 19
1.12 Air Filter Timer 19
1.13 Display and Cancellation of Alarms and Warnings
19
1.14 Event Log (History) 20
1.15 System Versions and Running Time 21
1.16 Air Flow Adjustment 21
1.17 PID Controller Adjustment 21
1.18 Manual Control of Components 21
1.19 System Monitoring 21
1.20 Stand-By Mode Blocking 21
1.21 Supply Air Temperature Control and Compensati-
on 21
1.22 Supply Air Temperature Limits 22
1.23 The System Mode Communication with External
Contactor 22
1.24 Fan Speeds from an External System Contactor
22
1.25 Filter Protections 22
1.26 Fire Protection against External System Contac-
tor 22
1.27 CO2Reduction Function (only using additional
extract air CO2sensors) 23
1.28 Changing Passwords 23
1.29 Restoring Factory Defaults 23
1.30 Fan Control 23
1.31 Damper Control 23
1.32 Heat Exchanger Control 24
1.33 Heaters 25
1.34 Digital Input Conguration 25
1.35 Sensor Conguration 25
1.36 Communications Line Conguration 26
Principle mounting diagram Smarty 4X V 1.1 27
Principle mounting diagram Smarty 4X V 1.2 28
The principal connection scheme of internal and external
components 29
The principal connection scheme of internal and external
components 30
The principal connection scheme of internal and external
components 31
The principal connection scheme of internal and external
components 32
The principal connection scheme of internal and external
components 33
The principal connection scheme of internal and external
components 34
The principal connection scheme of internal and external
components 35
System protection 36
System protection 36
Recommendations before the start of the unit (before
the nal user) 36
Possible faults and troubleshooting 36
Sensors and their technical information 36
Controller miniMCB EX1 V1.0 37
Controller miniMCB EX1 V1.0 zones 37
Fire Protection Signal Input (Fire protection input
(NC)) 41
Outdoor Air Pre-Heater 41
System mode ir Fan speed switch 41
Supply air CO2or RH (input 0-10VDC) 42
Extract air CO2or RH (input 0-10VDC) 42
Room CO2 transmitter installation recommendation 43
CO2concentration according to Pettenkofer limit 43
Smarty 4X V 1.1 Version - Heater Control 44
Smarty 4X V 1.2 Version - Heater Control 46
Connection of Supply and Extract Air Dampers 48
Connection of Remote Control Panel or ModBus 48
Operation and Alarm Indication (Smarty 4X V 1.1) 48
Fire Place Connection (Smarty 4X V 1.1) 49
LED indication 49
Smarty 4X V Accessories 50
Smarty 4X V Spare Parts 52
Warranty 53
Unit’s maintenance table 54

3
Smarty 4X V
www.salda.lt
200003025238
IV
PV
KE
PE
M
0.084 kW; 0.92 A; 230/50 V/Hz; ~1
0.085 kW; 0.93 A; 230/50 V/Hz; ~1
kW; A; 0 V/Hz; ~0
kW; A; 0 V/Hz; ~0
0.005 kW; 0.021 A; 24/50 V/Hz; ~-
0.17 kW; 1.87 A; IP-34
TOTAL:
gu072489 / 2014.03 www.salda.lt
1
3
4
5
2
6
200003025238
IV
PV
KE
PE
M
0.084 kW; 0.92 A; 230/50 V/Hz; ~1
0.085 kW; 0.93 A; 230/50 V/Hz; ~1
kW; A; 0 V/Hz; ~0
kW; A; 0 V/Hz; ~0
0.005 kW; 0.021 A; 24/50 V/Hz; ~-
0.17 kW; 1.87 A; IP-34
TOTAL:
gu072489 / 2014.03 www.salda.lt
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2
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PAVYZDYS
EXAPLE
PAVADINIMAS
TITLE
M
200003025238
IV
PV
KE
PE
M
0.084 kW; 0.92 A; 230/50 V/Hz; ~1
0.085 kW; 0.93 A; 230/50 V/Hz; ~1
kW; A; 0 V/Hz; ~0
kW; A; 0 V/Hz; ~0
0.005 kW; 0.021 A; 24/50 V/Hz; ~-
0.17 kW; 1.87 A; IP-34
TOTAL:
gu072489 / 2014.03 www.salda.lt
1
3
4
5
2
6
ESEMPIO
TITOLO
200003025238
IV
PV
KE
PE
M
0.084 kW; 0.92 A; 230/50 V/Hz; ~1
0.085 kW; 0.93 A; 230/50 V/Hz; ~1
kW; A; 0 V/Hz; ~0
kW; A; 0 V/Hz; ~0
0.005 kW; 0.021 A; 24/50 V/Hz; ~-
0.17 kW; 1.87 A; IP-34
TOTAL:
gu072489 / 2014.03 www.salda.lt
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2
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MUSTER
TITEL
STICK HERE
Stick the auxiliary label on the unit (on an easily accessible place) or on the
dashed place of a technical manual in order to keep the important informa-
tion about the unit.
1 – Logo
2 – Internal usage code
3 – Brand name
4 – Technical data
5 – Units number
6 – Web address
• All units are packed in the factory to withstand regular conditions of transportation.
• Upon unpacking, check the unit for any damages caused during transportation. It is forbidden to install damaged units!!!
• The package is only for protection purpose!
• While unloading and storing the units, use suitable lifting equipment to avoid damages and injuries. Do not lift units by holding on power supply
cables, connection boxes, air extract or exhaust anges. Avoid hits and shock overloads. Before installation units must be stored in a dry room with
the relative air humidity not exceeding 70% (at +20 °C) and with the average ambient temperature ranging between +5 °C and +30 °C. The place of
storage must be protected against dirt and water.
• The units must be transported to the storage or installation site using forklifts.
• The storage is not recommended for a period longer than one year. In case of storage longer than one year, before the installation it is necessary
to verify whether the bearings of fans and motor rotate easily (turn the impeller by hand) and if the electric circuit insulation is not damaged or the
moisture is accumulated.
Preparation for transportation
Warning – pay attention Additional information
585 mm
700 mm
2120 mm
585 mm
700 mm
1058 mm
912 mm
585 mm
700 mm
585 mm
700 mm
2120 mm
585 mm
700 mm
1058 mm
912 mm
585 mm
700 mm

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Smarty 4X V
www.salda.lt
Smarty 4X V are residential air handling unit with a high e󰀩ciency (up to 90 %) counter ow heat exchanger. The unit provides ventilation in the home
and takes the heat from the exhausted air. AHU complies with ErP 2018 and Passivhaus requirements. The unit is operated by a separate remote
control panel or though separate MB-Gateway by PC. Remote control panel and MB-Gateway are optional and not included in standard package.
Control functions depend on selected control board type: MiniMCB or MiniMCB basic.
Smarty 4X V operates within the limits of the airow diagrams and is suitable for indoor operation only. Required ambient temperatures must be from
+5 oC to +40 oC. For the cold climate zones (air temperatures below -5 oC), integrated or optional pre-heater is required.
• Do not use the unit for purposes other than its’ intended.
• Do not disassemble or modify the unit in any way which may lead to mechanical failure or injury.
• Use special clothing and be careful while performing maintenance and repair jobs – the unit’s and its components’ edges may be sharp and cutting.
• Do not wear loose clothing that could be entangled in to operating unit.
• Do not place ngers or other foreign objects through inlet or exhaust guards or into connected duct. If a foreign object enters the unit, immediately
disconnect power source. Before removing object, make sure that any mechanical motion has stopped, the heater has cooled down and the restart is
not possible.
• Do not connect to any other power source than indicated on the model label.
• Do not place or operate unit on unsteady surfaces and mounting frames.
• Mount the unit rmly to ensure safe operating.
• Never use this unit in any explosive or aggressive elements containing environment.
• Do not use the unit if external connections are broken or damaged. If there are any defects, stop operating the unit and replace the damaged parts im-
mediately. That can be performed only by qualied electrician.
• Do not use water or another liquid to clean electrical parts or connections.
• If you notice water on electrical parts or connections, stop operating the unit.
Standard package (without optional accessories) includes:
1. Key - 1 pc.
2. Sealing tape FIX-PV 6x20
3. Suspension bracket - 1 pc.
4. Condensate outlet pipe G3/8 - 1 pc.
1
2
3
4

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Smarty 4X V
www.salda.lt
1. Flange 4 pcs.
2. Outdoor air temperature sensor (TL)
3. Outdoor air lter (G4/(F7 - optional)) and the EPP cover
4. Extract air sensor (TA)*
5. Bypass damper (M1)*
6. Preheater (PE1)*
7. Extract air lter (G4) and the EPP cover*
8. Supply air sensor
9.CE7/7 power supply cable - 3 m.
10. Switching Power Supply
11. Control board.
12. Supply air fan (PV)*
13. Exhaust air fan (IV)*
14. Galvanized steel casing
15. EPP casing
16. Heat exchanger
17. Condensate tube plugs
* Depends on unit type.
Product name
Control board
Type
Heat recovery
Temperature
control
Bypass damper
Pressure sensor
(lter pollution
monitoring)
Integrated pre-
heater
Optional heating elements
*- only pre-heater or
heater
Duct based
Air Pre-
Heater
Duct based
Air Heater
Smarty 4X V 1.1 Mini MCB Premium + + + + + -+
Smarty 4X V 1.2 Mini MCB Basic Advanced + + + - - +*
Smarty 4X V are available in three versions:
• Unit is designed to operate only indoors.
• It is forbidden to use the unit in potentially explosive environment.
• Unit is designed to supply/extract only clean air (free of chemical compounds causing metal corrosion, of substances aggressive to zinc, plastic and
rubber, and of particles of solid, adhesive and  bred materials).
Outdoor - temperature min./max. [°C]
-5/ +40*
-11 / +40**
-30 / +40***
- humidity [%] 90
* - Outdoor air temeperature without preheater (Salda Antifrost o󰀨)
** - with integrated preheater (Smarty 4XV 1.1) or Smarty 4XV 1.2 (Salda Antifrost on)
*** - with optional preheater on duct
Salda Antifrost uses dis-balancing of the air ow and it may cause negative pressure in premises.
Extract - temperature min./max.*[°C] +15 / +40
- humidity [%] 60
Not suitable for swimming pools, saunas and other
similar facilities.
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Smarty 4X V
www.salda.lt
• Maintenance should be performed only by experienced and trained sta󰀨.
• The fan should be inspected and cleaned at least once a year.
• Be sure the fan is disconnected from power source before performing any maintenance or repair.
• Observe sta󰀨 safety regulations during maintenance and repair.
• The motor is of heavy duty ball bearing construction. The motor is completely sealed and requires no lubrication. Supplied air fan from X2, X4. Extract
air fan from X2, X4.
• Detach fan from the unit.
• Impeller should be specially checked for buil-up material or dirt which may cause an imbalance. Excessive imbalance can lead to accelerated wear
on motor bearings and vibration.
• Clean impeller and inside housing with mild detergent, water and damp, soft cloth.
• Do not use high pressure cleaner, abrasives, sharp instruments or caustic solvents that may scratch or damage housing and impeller.
• Do not plunge the motor into any uid while cleaning impeller.
• Make sure, that impeller’s balance weights are not moved.
• Make sure the impeller is not hindered.
Dirty lters increase air resistance, airow into the room.
Remowing Smarty 4X V lters: opening lter cover (pulling the strap), retractable lter. Uses G4 / (F7 - optional) lters.
Unplug unit from mains before opening the door (discon-
nect the power plug from the outlet or if there is a two-pole
automatic circuit breaker installed – disconnect it as well.
It is necessary to ensure that it won’t be turned on by third
parties) and wait until the full stop of the fans (for about 2
min.).
Changing lters, lters reload timer control. Description
of remote control panel functions is provided in the remote
control panel technical documentation or on the website
www.salda.lt.
Allowed to operate the unit without lters!
It is advisable to change the lters every 3 - for 4 months,
or according to their testimony timer remote control.

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Smarty 4X V
www.salda.lt
• Mount the fan back into the unit. Connect the fan to power supply source.
• If after maintenance the fan does not start or stop itself, contact the producer. Malfunction of the fan can be identied according to the pressure in the
system (when pressure switches are connected). When there is a folt in fans’ motor, any separate notice is shown on the control panel.
Unplug fan control connector from the control board. Connectors are the same for the both fans – X2, X4.
Disconnect fan power supply by pulling X36 connector out from the power source (see el. scheme below). Unscrew one screw from protection plate
of the power source and disconnecting connector X36.
Be sure the unit is disconnected from power source
before performing any maintenance or repair.

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Smarty 4X V
www.salda.lt
• Proceed to maintenance and repair after any rotation in the fan stopped.
• Clean the heat exchanger once a year.
• Firstly take out heat exchanger cassette carefully. Submerge it into a bath and wash with warm soapy water (do not use soda). Then rinse it with
weak hot water stream (too strong stream can fold the plates). Place back the heat exchanger only when it is completely dry.
Bypass damper and pre-heater are mounted on one block. The pre-heater shall be disconnected by removing X29 connector. The bypass damper
shall be disconnected by removing X25 .
X29 X25

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Smarty 4X V
www.salda.lt
• Unscrew the front bolt securing (1) the control board holder to the unit casing.
• Withdraw the automation through the front part (2).
• Disconnect control board from the Switching power supply (3).
• The connectors are marked according to connection location. Thus during automation reassembly please observe the marking of the connection
location of connectors and controller. If the marking on the controller terminals is not visible follow the PCB information provided in this passport (see
miniMCB description: Fig. 2 and Fig. 3):
Prior to connecting the unit to the mains, the door shall be closed.
• All the metering, control and execution units shall be mounted in freely accessible locations for maintenance, repairs or replacement.
• Prior to handover to the user, the pre-commissioning activities shall be performed to ensure proper operation of the automatic control system of the
air handling unit. Power plug socket shall be installed at a distance to ensure unstrained power cable of the unit. Standard length of the unit power
cable shall be: ~2.5 m long from the unit casing.
The installed plug socket shall be of at least the same nominal current as the unit nominal current, which is indicated in the unit rating plate.
Unit shall be connected to the mains through the cur-
rent leakage relay (30 mA).
After complete dismantling of the unit control auto-
mation and its reinstallation, when connecting the
automation connectors, it is necessary to check if the
connector conductors are not damaged or otherwise
broken.
1. 2.
3.
1.
2. 3.
4. 5. 6. 7.
• Unscrew screw at the front side;
• After loosening power supply, lift it up in order to disconnect connector below. (2-3).
• Power supply is under the protection cover. Please remove the cover in order to change it (4-5). Then release power supply from the base (6-7).
• Perform assembly in the reverse order.
• Connectors are marked according connection place, therefore, please, pay attention to the marking.

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Smarty 4X V
www.salda.lt
• Install the control panel at the designed location.
• Connect the connection cable supplied with the remote control panel kit between the control panel and the HVAC unit. It is recommended to install
the remote control board separately from the power cables.
NOTE: If the cable is used together with other power cables, the remote control panel cable shall be shielded with grounded shielding armour.
NOTE: the remote control panel shall be connected and/or disconnected only after disconnecting power supply to HVAC unit.
Electrical equipment connection to the control board terminals. Control board connectors shall be of the following cross sectional area.
Control board 0,5 mm21,5 mm22,5 mm2
miniMCB X1, X2, X3, X4, X5, X6, X7 X9, X13, X14, X15, X16 X10, X11, X12, X17
miniEX1 X19, X20, X21, X23 - -
Power supply - - Xp1
Automation E zone, connector Xp1 general power connection to the unit ~1/230 VAC.
The 48 V direct current (DC) power source is intended to use only for power supply of Smarty 4X V fans.
Exhaust air Supply air Outdoor air air Extract
DC

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Smarty 4X V
www.salda.lt
NOTE. Subject to technical modication
Technical data
W
According to EN 13141-7 standard.
Smarty 4X V
Exhaust air lter class G4
width L [mm] 475
height H [mm] 180
depth W [mm] 25
model MPL
Supply air lter class G4/(F7 - optional)
width L [mm] 475
height H [mm] 134
depth W [mm] 25
model MPL
Smarty 4X V 1.1 4X V 1.2
Exhaust air fan
phase/voltage [50 Hz/VAC] ~1/230
power/current [kW/A] 0,21/0,92
speed [min-1] 4400
control input [VDC] 0-10
protection class IP54
Supply air fan
phase/voltage [50 Hz/VAC] ~1/230
power/current [kW/A] 0,21/0,92
speed [min-1] 4400
control input [VDC] 0-10
protection class IP54
Total power consumption power/current [kW/A] 1,2/5,2 -
Automatic control integrated 1,62/7,09 0,42/1,89
Thermal e󰀩ciency 90 %*
Insulation of walls [mm] 30
Netto weight [kg] 39
Pre-heater power/current [kW/A] +
Smarty 4X V LWA visas, dB(A) LWA, dB(A)
63 Hz 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz 5 kHz
Supply 62 47 53 58 56 54 51 46 41
Exhaust 54 44 45 50 47 45 43 38 35
Surrounding 51 30 35 48 46 40 35 27 24
Measured at ow/pressure [m3/h / Pa] 406/50
Right side connection Left side connection

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Smarty 4X V
www.salda.lt
Operational limits
Power consumption
Supply air
700600500400300200100
0
80
85
90
95 194
16713911183
55
28
00
100 200 300 400 500 600 700
0
0
200
400
600
800
1000
1200
1400 250
200
150
100
50
280 83 111 139 167 194 55
0100 200 300 400 500 600 700
0
200
400
600
800
1000
1400
1200
250
200
150
100
50
28 55 83 111 139 167 194
0 100 200 300 400 500
SFP 2,5
SFP 2,0
SFP 1,5
600 700
00
200
400
600
800
1000
1200 28 55 83 111 139 169 194
Δ Pstat [Pa]
V [l/s]
P [W]
V [m /h]
3
Δ Pstat [Pa]
V [l/s]
P [W]
V [m /h]
3
Δ Pstat [Pa]
V [l/s]
V [m /h]
3
Δ Pstat [Pa]
V [l/s]
V [m /h]
3
Exhaust air
700600500400300200100
0
80
85
90
95 194
16713911183
55
28
00
100 200 300 400 500 600 700
0
0
200
400
600
800
1000
1200
1400 250
200
150
100
50
280 83 111 139 167 194 55
0100 200 300 400 500 600 700
0
200
400
600
800
1000
1400
1200
250
200
150
100
50
28 55 83 111 139 167 194
0 100 200 300 400 500
SFP 2,5
SFP 2,0
SFP 1,5
600 700
00
200
400
600
800
1000
1200 28 55 83 111 139 169 194
Δ Pstat [Pa]
V [l/s]
P [W]
V [m /h]
3
Δ Pstat [Pa]
V [l/s]
P [W]
V [m /h]
3
Δ Pstat [Pa]
V [l/s]
V [m /h]
3
Δ Pstat [Pa]
V [l/s]
V [m /h]
3
Specic fan power (SFP)
700600500400300200100
0
80
85
90
95 194
16713911183
55
28
00
100 200 300 400 500 600 700
0
0
200
400
600
800
1000
1200
1400 250
200
150
100
50
280 83 111 139 167 194 55
0 100 200 300 400 500 600 700
0
200
400
600
800
1000
1400
1200
250
200
150
100
50
28 55 83 111 139 167 194
0 100 200 300 400 500
SFP 2,5
SFP 2,0
SFP 1,5
600 700
00
200
400
600
800
1000
1200 28 55 83 111 139 169 194
Δ Pstat [Pa]
V [l/s]
P [W]
V [m /h]
3
Δ Pstat [Pa]
V [l/s]
P [W]
V [m /h]
3
Δ Pstat [Pa]
V [l/s]
V [m /h]
3
Δ Pstat [Pa]
V [l/s]
V [m /h]
3
Temperature e󰀩ciency
700600500400300200100
0
80
85
90
95 194
16713911183
55
28
00
100 200 300 400 500 600 700
0
0
200
400
600
800
1000
1200
1400 250
200
150
100
50
280 83 111 139 167 194 55
0100 200 300 400 500 600 700
0
200
400
600
800
1000
1400
1200
250
200
150
100
50
28 55 83 111 139 167 194
0 100 200 300 400 500
SFP 2,5
SFP 2,0
SFP 1,5
600 700
00
200
400
600
800
1000
1200 28 55 83 111 139 169 194
Δ Pstat [Pa]
V [l/s]
P [W]
V [m /h]
3
Δ Pstat [Pa]
V [l/s]
P [W]
V [m /h]
3
Δ Pstat [Pa]
V [l/s]
V [m /h]
3
Δ Pstat [Pa]
V [l/s]
V [m /h]
3
Temperature e󰀩ciency (balanced mass ow):
Extract air 20 oC / 39 % RH 20 oC / 60 % RH 20 oC / 39 % RH
Outdoor air 7 oC / 80 % RH 2 oC / 80 % RH -7 oC / 80 % RH
Standart EN 13141-7

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Smarty 4X V
www.salda.lt
* Possibility to insert coupling of corresponding diameter
Ø 150 mm/160 mm*
252 mm
224 mm
386 mm
110 mm 265 mm
110 mm 113 mm
116 mm 170 mm 80 mm
810 mm
900,5 mm
599 mm
406 mm G3/8
538 mm
284 mm
Ø 160 mm
Ø 150 mm
G3/8

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Smarty 4X V
www.salda.lt
• Installation should only be performed by qualied and trained sta󰀨.
• When connecting air ducts, consider the notices indicated on the casing of the unit.
• Before connecting to the air duct system, the connection openings of ventilation unit should be closed.
• When connecting the ducts , you should pay attention to the air ow direction indicated on the device housing.
• Do not connect the bends close to connection anges of the unit. The minimum distance of the straight air duct between the unit and the rst branch of
the air duct in the supply air duct must be 1xD, in air exhaust duct 3xD, where D is diameter of the air duct.
• It is recommended to use the accessories-holders. This will reduce vibration transmitted by the unit to the air duct system and environment.
• Enough space must be left for opening of the maintenance door and lter covers.
• If the installed ventilation unit is adherent to the wall, it may transmit noise vibrations to the premises. Though the level of noise caused by the fans is
admissible, it is recommended to mount the unit at the distance of 400 mm from the nearest wall. If it is not possible, the mounting of the unit is recom-
mended on the wall of the room where the level of noise is not important.
• Ducts are connected to the unit in such way that they could be easily disassembled and the heater could be removed from the unit when performing
service or repair works.
400 mm
L
2xL
Legs are optional and not included in standard package.
40 mm
c
b
90
90
d
a
10 mm 10 mm
a
10 mm
b
c
14 mm
Unit mounting on wall:
a) To reduce the vibration stick the insulating tape on the unit‘s casing side which touches the wall before mounting the unit on the wall.
b) The unit has to be mounted on the mounting brackets.
c) AHU mounting drawing.
d) After the unit is mounted two wall bracket tabs has to be folded to 90o angle by pliers to avoid the accident fall of the unit.

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Smarty 4X V
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• Supply voltage to the unit must be connected by a qualied specialist following the manufacturer’s instructions and e󰀨ective safety instructions.
• The unit’s power network voltage must correspond to electrotechnical parameters of the unit indicated in the technical decal.
• The unit’s voltage, power and other technical parameters are provided in the unit’s technical decal (on the unit casing). The unit must be connected
to the voltage plug socket of the grounded power network in compliance with the e󰀨ective requirements.
• The unit must be earthed according to the rules on installing electrical equipment.
• It is prohibited to use extension wires (cables) and power network plug socket distribution devices.
• Prior to carrying out any ventilation unit installation and connection activities (until its hand-over to the customer), the unit must be disconnected from
the power network.
• After installation of the ventilation unit, the power network plug socket must be accessible at any time and disconnection from the power network is
performed through the two-pole circuit breaker (by disconnecting phase pole and neutral).
• The unit must be thoroughly checked against damages (execution, control, measurement nodes) during transportation before it is connected to the
power network.
• The power cable can be replaced only by a qualied specialist upon the evaluation of the rated power and current.
400 mm
L
2xL
The manufacturer does not assume any liability for
personal injuries and property damage due to non-
conformance with the provided instructions.

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2
3
3
II
IV
IVI
III V
VII
VIII
Control board functions and logics are designed according to Standards DIN 1946-6:2009-05 and EN 12098-3.
MCB control board can be controlled by: Stouch remote control panel or MB - GATEWAY web application. Description of remote control panel func-
tions is provided in the remote control panel technical documentation or on the website www.salda.lt.
It’s required to connect condensate drainage system after hanging or placing of air handling
unit. Insert condensate draining into AHU. Condensate draining must be lubricated with a
sealant (I-VII) and connected to a condensate removal system.
Remove the sticker on the bottom of the unit, which covers a drainage hole. Then open the
unit cover (II) and take out the heat exchanger. Put condensate outlet pipe to EPP casing
through intended hole (V), use silicon gasket (IV). Place from the bottom side gasket and
screw a brass nut on (VII). Screw the nut by holding the pipe with a hand in order prevent
spinning (it’s possible to hold with a screwdriver or 1 Euro coin by putting it in the notch on the
pipe). Screw the nut with a wrench (No. 27) until a top part presses in the EPP casing (level
with a surface or slightly enters into it). Attention: Screwing force may not exceed 2 Nm.
Pipe (3) (metal pipe should be connected with G3/8 elbow, plastic pipe – with G3/8 elbow or
rubber hose – with strap if the unit is placed on the legs, in other cases condensate hose can
be connected in any direction) should be connected by following order: AHU (1), pipe (2), and
drainage system. Pipes (3) should be bended not less than 3° degrees (1 meter of pipe must
be bended 60 mm downwards)! Before turning on AHU (1) the draining system should be
lled up with at least 0.5 l of water (pipe loop (3) must be always lled with water), also check if
water reaches sewerage system! In other case premise can be ooded during AHU operation!
Draining system must be installed in the premise where the temperature is not lower than 1°C.
If temperature falls below 0°C the draining system should be isolated with thermal isolation.
The pipe loop 2) not necessarily must be mounted below the AHU (1), but below the AHU (1)
level.
Note. If the collector is situated upstream, install a system with a condensate pump (o󰀨ered
as an accessory).
D = min 150 mm
Before every heating season the condensate tube shall be
lled with water as indicated during the rst start-up! Before
every heating season the condensate tube shall be lled
with water as indicated during the rst start-up!
Air Handling Unit uses two types of boards, depending on the
selected product version: miniMCB or miniMCB basic. Their
functionality is di󰀨erent, thus check the board name by the
product version.

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The unit can be congured only with FLEX MCB remote control panel
or MB-Gateway web application.
The following control board functions can be fully controlled
only with FLEX MCB remote control panel or MB-Gateway web ap-
plication. In case of Stouch remote control panel use the description
of remote control panel functions for MCB control board.
System Modes:
› Stand-by;
› Building protection;
› Economy;
› Comfort.
In Stand-by mode the system is shut down for a permissible period (based on the Stand-by mode blocking function settings).
The Building protection mode is designed to protect premises against moisture accumulation.
The system operates at speed 1. Based on manufacturer’s parameters (by default) this mode controls the temperature (the desirable one is indicated),
but, if necessary, it can be switched o󰀨, i.e. to activate the energy saving mode. Also, if necessary, full recirculation function is activated. (ADJUSTER
› USER SETTINGS › BUILDING PROTECTION MODE TEMPERATURE or USER › MENU › SETTINGS › BUILDING PROTECTION).
After activating the energy saving mode, temperature is maintained only by the heat exchanger. It will seek to maintain the current temperature in the
room; however, if the supply air temperature falls below the minimal supply air temperature level, heaters will be activated and they will maintain a
temperature one degree above the minimum. Also, if the supply air temperature rises above the maximal supply air temperature level, coolers will be
activated and they will maintain a temperature one degree below the maximum.
Economy mode is designed to save energy when people are absent from the premises. The system operates at speed 2. Based on manufacturer’s
parameters this mode controls the temperature maintaining (the desirable one is indicated), but, if necessary, it can be switched o󰀨, i.e. to activate the
energy saving mode. Also full recirculation function is activated. (ADJUSTER › USER SETTINGS › ECONOMY MODE TEMPERATURE or USER ›
MENU › SETTINGS › ECONOMY MODE).
Comfort mode is running when people are present in the premises. The system operates at speed 3. In this mode the temperature is always main-
tained – it is set in the main window (ADJUSTER › VENTILATION CONTROL or USER › SET POINT).
System modes are changed by the following functions (indicated in a sequential order):
› Weekly Schedule;
› Switching on is activated from an external contactor;
› Manual mode selection;
› Holiday Schedule;
› Stand-by mode blocking.
Based on the Weekly Schedule the system decides in what mode it will be operating; however, the user may change it manually. The system informs
when the next mode change is scheduled. After power loss the mode is selected based on the Weekly Schedule; however, if it is not set, the mode
that was set before the power loss will be activated.
The user may change modes even when the switching on is activated from an external contactor. The only case when it is not possible – active period
of Holiday Schedule of which the system informs and which must be changed to avoid blocking.
Stand-by mode can be blocked by selected parameters. If at least one of the above functions changes its mode into Stand-by mode, it must be
checked whether this mode is not currently blocked. If it is blocked, the previous mode shall be activated.
The function order is provided below.
Start >
› Reading of input data;
› Weekly Schedule;
› Mode external switch;
› User entered data;
› Holiday Schedule;
› Stand-by mode schedule;
› Stand-by mode blocking;
› Protection against Dryness;
› Boost ventilation;
› Air handling unit operating algorithm;
› Protection;
› Blocking of air handling unit operating algorithm;
› Manual Control of Components;
› Data entering into outputs and user environment.
End <
This eld informs a user about the existing system state. It is displayed in the main window ADJUSTER › VENTILATION CONTROL or the main win-
dow of the user environment. The table below shows possible system states.
System status Description
Stand-by mode System operates in stand-by mode.
Building protection mode System operates in Building protection mode

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User about active functions, warnings or alarms is notied in the window ADJUSTER › ALARMS or USER › ALERT.
Functions are displayed in the main window ADJUSTER › VENTILATION CONTROL or in the user environment window. The table below provides
indications and their descriptions.
Functions indications Description
Working indication output Working indication output is activated
Alarm indication output Failure indication output is activated
System mode switch Switching on from an external contactor is activated
Custom fans speed switch Selected fan speed from an external contactor is activated
Winter Active winter mode
Stand-by mode blocking activated Stand-by mode blocking is activated
Slowing down fans Fans are slowed down
Slowing down fans by temperature Fans are slowed down based on supply air temperature
Night cooling function activated Night cooling function is activated
Hydronic pump exercise activated Preventive maintenance of circulation pumps is activated
Service stop function Blocking of air handling unit operating algorithm; Service activities are carried out
Holidays Holiday Schedule interval is active. System mode can be changed only upon changing the Holiday Sched-
ule interval
Reducing CO2level CO2reduction function is activated
Full recirculation Full recirculation function is activated
For smooth execution of schedules, event log and winter/summer function, it is necessary to set proper date and time in section ADJUSTER › USER
SETTINGS › DATE AND TIME SET and click a button DATE AND TIME SET. It can also be indicated in user environment USER › MENU › SETTINGS
› DATE AND TIME. Fast synchronization with the computer time is possible in user and adjuster environment.
A Weekly Schedule consists of 10 events. They can be added, deleted, activated and deactivated. For every event its time, mode and week day is
indicated.
The system changes modes according to the Weekly Schedule only when the indicated time comes, therefore a user can always change the existing
mode manually. This schedule noties of the upcoming mode change by indicating the time remaining till the next event.
The schedule is edited in user environment USER › MENU › SCHEDULE.
This schedule is used when the unit has to operate in uniform mode during holidays. The user interface shows when the schedule period is active as
nobody can change the mode activated by this function (except for protection). In order to control the system in a normal manner, the Holiday Schedule
period must be deactivated, i. e. zero values must be indicated or dates must be changed. Up to ve holiday periods can be set.
The schedule is edited in the user environment USER › MENU › HOLIDAY.
The winter/summer function is set during the cold periods, because some parts of the system have to be protected against cold outdoor air. During
winter it is recommended to leave the unit switched on, therefore it is possible to set blocking of switch-o󰀨. Water heaters must be always switched
on during the entire winter.
The winter mode may be indicated
Economy mode System operates in Economy mode
Comfort mode System operates in comfort mode
Emergency run System operates in emergency mode (for details refer to alarms section)
Preparing System is preparing for operation (pre-heating of water heaters, etc.)
Opening dampers Dampers are opened
BOOST function activated BOOST function is active
Cooling heaters Electric heaters are cooled down prior to shutdown of fans
Closing dampers Dampers are closed
Night cooling Active night cooling
Critical alarm Critical failure, system is shut down (for details refer to alarms section)
Fire alarm Fire protection from an external contactor is activated
Heat exchanger frost protection activated Heat exchanger frost protection is activated
Change lters Warning about clogged lters (pressure switches are activated or lter timer is ac-
tivated)

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Boost ventilation function is used for fast ventilation of premises. It activates the maximum air-ow (speed 4). Boost ventilation has be temporary, i.e.
it must be a nal condition (e.g. CO2 limit, time). The reason for this limitation – protection against dryness. High air ow reduces humidity, and dry
air is harmful for health.
The function is activated by pressing ON and deactivated by pressing OFF button in the BOOST section, or by means of an external contactor (FANS
SPEED SWITCH), which is congured in the service environment (SERVICE › MAIN › FANS SPEED SWITCH) section.
The function is inactive when Stand-by mode is on. Time limit is indicated (ADJUSTER › USER SETTINGS › BOOST TIMER or USER › MENU › SET-
TINGS › BOOST TIMER). Once the function is activated, the time is set by the timer and the time is counted till its deactivation. It may be adjusted in
real-time, i.e. when the function is on, in ADJUSTER › VENTILATION CONTROL or in the user environment main window.
› Manually;
› By date;
› Based on 3-day mean outdoor temperature, to be calculated only when the fresh air (outdoor) pre-heater is o󰀨.
This function is designed to protect the building against dryness. If it is active, it calculates the 3-day mean humidity of exhaust air from the premises.
If it drops below 30 %, the fans start operating in speed 2 in Comfort mode. A user is notied of the activated protection and limited air-ow.
If the mean humidity exceeds 30 % or this function is switched o󰀨 manually, the fans start operating in speed 3 in Comfort mode.
The function is switched on/o󰀨 in the section ADJUSTER › USER SETTINGS › DRYNESS PROTECTION or in the window USER › MENU › SET-
TINGS › OTHER.
This function is designed to save energy in the morning, when a fresh night air is used to cool down the building. The function is active only in summer.
If it is switched on but not active yet, activation conditions are checked:
› System time from function start to the end (hours/minutes);
› Time is exactly every hour since the start;
› If STAND-BY mode is set, the unit operates in BUILDING PROTECTION mode for 5 minutes so that the actual temperature data is available.
The temperature is checked after purging. If it is not suitable, the unit returns to STAND-BY mode;
› Outdoor temperature is higher than the set outdoor temperature;
› Exhaust air temperature is higher than the set temperature;
› Exhaust air temperature is higher than the outdoor temperature by at least 2 °C;
› Summer.
If all conditions are met the unit starts operating in COMFORT mode (without temperature maintaining). The main window shows that the Night cooling
function is active. When it is active continuously, the deactivation conditions are checked:
› Time does not correspond to the start/end interval;
› Exhaust air temperature drops below the set temperature;
› Outdoor temperature drops below the set temperature;
› Mode other than COMFORT was switched or the unit has been shut down.
The air lter timer indicates to the user when the lters are clogged. After their replacement, the timer must be reset. The user can always see how
many days are left till the lter replacement. The timer limit can be set in the service environment. Maximum permissible time – 1 year. It is calculated
only when the fans are rotating.
The lter timer can be reviewed and reset in the section ADJUSTER › USER SETTINGS › FILTERS TIMER or in the window USER › MENU › SET-
TINGS › FILTERS TIMER.
The time limit is indicated in the service environment SERVICE › MAIN › AIR FILTERS PROTECTIONS.
The system noties the user about the system failures by warnings that are canceled automatically and by alarms that have to be canceled manually.
The latter are recommended to be canceled by a specialist prior to nding out the causes of the alarm. Information on alarms and warnings is also
displayed in the main window ADJUSTER › VENTILATION CONTROL. If at least one alarm is active, the system is shut down and external failure in-
dication is activated. Alarms and warnings can be reviewed and canceled in the window ADJUSTER › ALARMS or USER › ALERT. All possible alarms
and warnings are provided in the table below.
Indication Alarms list
. Warning! Rotor broken belt alarm
A.2 Alarm! Fireplace protection activated
. Warning! Dryness protection activated
. Warning! Plate heat exchanger frost protection activated
A.5 Alarm! Plate heat exchanger frost protection system stopped
.6 Warning! Plate heat exchanger frost protection (pressure relay)
A.7 Alarm! Hydronic heater frost protection. System stopped
. Warning! Too low supply temperature
. Warning! Too high supply temperature
A. Alarm! Too low supply temperature. System stopped
A. Alarm! Too high supply temperature. System stopped
.2 Warning! Change supply air lter (pressure relay)

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The system records 50 recent events (failures, alarms, re damper testing results, etc.).
The log stores the description of events and time.
The event log may be reviewed in the window ADJUSTER › HISTORY or USER › MENU › HISTORY.
. Warning! Change extract air lter (pressure relay)
. Warning! Change supply and extract lters (timeout)
A.5 Alarm! Power supply failure. Please, check F1 fuse
.6 Warning! Supply air temperature sensor failure. Emergency run
.7 Warning! Extract air temperature sensor failure. Emergency run
. Warning! Exhaust air temperature sensor failure. Emergency run
. Warning! Outdoor air temperature sensor failure. Emergency run
.2 Warning! Hydronic heater water temperature sensor failure. Emergency run
.2 Warning! Hydronic pre-heater water temperature sensor failure. Emergency run
.22 Warning! Hydronic cooler water temperature sensor failure. Emergency run
.2 Warning! Controller cabinet temperature sensor failure. Emergency run
A.2 Alarm! Supply air temperature sensor failure. System stopped
A.25 Alarm! Extract air temperature sensor failure. System stopped
A.26 Alarm! Exhaust air temperature sensor failure. System stopped
A.27 Alarm! Outdoor air temperature sensor failure. System stopped
A.2 Alarm! Hydronic heater water temperature sensor failure. System stopped
A.2 Alarm! Hydronic pre-heater water temperature sensor failure. System stopped
A. Alarm! Hydronic cooler water temperature sensor failure. System stopped
A. Alarm! Controller cabinet temperature sensor failure. System stopped
.2 Fire damper test OK
. Warning! Fire damper test failed
A. Alarm! Heater manual protection. System stopped!
.5 Warning! Heater automatic protection
A.6 Alarm! Pre-heater manual protection. System stopped!
.7 Warning! Pre-heater automatic protection
A. Alarm! Supply fan failure
A. Alarm! Extract fan failure
A. Warning! DX cooler failure
A. Alarm! Fire
A.2 Alarm! Supply fan pressure protection. System stopped
A. Alarm! Extract fan pressure protection. System stopped.
A. Alarm! Internal system error.
A.5 Alarm! Heater manual protection. Boosting.
A.6 Alarm! Pre-heater manual protection. Boosting.
A.7 Alarm! Internal communication error
. Warning! DX cooler defrosting
. Warning! Too high 3 days extract humidity. Increasing air ow.
.5 Warning! Too high extract humidity. Boosting.
A.5 Alarm! Rotor broken belt alarm. System stopped.
.52 Warning! Gas heater failure
.5 Warning! Gas pre-heater failure
.5 Warning! Too high condensation level
.55 Warning! Supply fan failure. Emergency run
.56 Warning! Extract fan failure. Emergency run
.57 Warning! Too low supply air ow for DX cooler