Wolf CWL-2-325 Manuale utente
7100832_202010
Installation and operating instructions
CWL -2-325
Comfort-Home-Ventilation
Modifications reserved
GB
Installation regulations
Heat recovery appliance:
CWL -2-325
Store near the appliance
This appliance may be used by children as of 8 years of age, persons with reduced
physical or mental capacities, and persons with limited knowledge and experience if they
are supervised or have received instructions on how to use the appliance safely and are
aware of the possible dangers.
Children younger than 3 years of age must be kept away from the appliance, unless they
are under constant supervision.
Children between the ages of 3 and 8 may only switch the appliance on or off, but only if
supervised or if they have received clear instructions on the safe use of the appliance
and understand the possible dangers, on the condition that the appliance has been
placed and installed in the normal position for use. Children between the ages of 3 and 8
may not insert the plug into the socket, nor clean or make changes to the settings of the
appliance, nor carry out any maintenance on the appliance that would normally be
carried out by the user. Children may not play with the appliance.
If you need a new power cable, always order the replacement from Wolf GmbH To
prevent dangerous situations, a damaged mains connection must only be replaced
by a qualified expert!
Country: GB
2 | WOLF GmbH 7100832_202010
Installation regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1 Delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Delivery size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Technical Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Connections and dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Exploded view of appliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2 Bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.3 Frost protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.4 Plus version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.1 Installation general. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2 Placing the appliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.3 Connecting the condensate discharge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.4 Connecting air ducts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.5 Electrical connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.5.1 Connecting the power plug. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Connecting the multiple switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.5.3 Connecting the eBus connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.5.4 24 volt connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.5.5 Connecting humidity sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.5.6 externalBus Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.5.7 Connecting "signal output” connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.5.8 ModBus Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.5.9 Coupling appliances using externalBus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6 Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1 General explanation of control panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2 Display layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.3 Display information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7Starting appliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.1 Switching appliance on and off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.2 Setting the air flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.3 Other settings for installer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.4 Factory settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8Fault. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8.1 Fault analysis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8.2 Display Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9.1 Cleaning filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9.2 Maintenance siphon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9.3 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
10 Electrical diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
11 Electrical connections accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
11.1 Connecting position switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
11.1.1 Connecting position switch with filter indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
11.1.2 Connecting wireless remote control (without filter indication). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
11.1.3 Connecting extra multiple switch with filter indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
11.1.4 Connecting extra multiple switch with filter indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7100832_202010 WOLF GmbH | 3
Contents
11.2 Connecting BM-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
11.3 Connecting humidity sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
11.4 Connecting CO₂ sensor(s). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
11.5 Connecting postheater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
11.6 Connecting preheater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
12 Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
12.1 Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
13 Setting values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
13.1 Setting values standard appliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
13.2 Setting values appliance with Plus pcb. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
14 ERP values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
15 Recycling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Contents xxx
4 | WOLF GmbH 7100832_202010
1 Delivery
1.1 Delivery size
Before installation of the heat recovery appliance is started, check that it has been supplied in complete
and undamaged condition.
The delivery size of the heat recovery appliance type CWL consists of the following components:
1. Heat recovery appliance
2. Wall mounting bracket consisting of:
– 1x mounting bracket
– 2 x protective caps
– 2x rubber strip
– 2x rubber rings
3. Siphon
4. Documentation set consisting of:
– 1x installation instructions
Delivery
7100832_202010 WOLF GmbH | 5
2 General
The CWL -2-325 and the CWL -2-325 Plus is a ventilation unit for the balanced ventilation of dwellings
with heat recovery.
Features:
– Maximum capacity 325 m³/h
– High return plastic heat exchanger
– Filters ISO Coarse 60%
– Modular electric preheater
– Automatic bypass valve
– Touchscreen
– Adjustable air quantity
– Filter indication on the appliance and the possibility of a filter indication on the multiple switch
– An intelligent frost protection including modular preheater
– Low sound level
– Constant flow control
With a Plus pcb more functions/connection possibilities (® Plus version page 11). These installation
instructions describe both the standard CWL -2-325 and the CWL -2-325 Plus.
The CWL -2-325 and the CWL -2-325 Plus are available in Left-hand and Right-hand versions; it is not
possible to convert the left and right-hand models into one another
For the correct connection ducts and dimensions (® Connections and dimensions page 8).
The appliance comes ready to plug in with a 230 V mains plug .
General
6 | WOLF GmbH 7100832_202010
3 Version
3.1 Technical Information
CWL -2-325
Supply voltage [V/Hz] 230V/50Hz
Dimensions (w x h x d) [mm] 4-0 Version 2-2 Version
750 x 650 x 560 750 x710 x 560
Duct diameter [mm] ø160
Ext. diameter condensate discharge [mm] ø32
Weight [kg] 37
Filter class ISO Coarse 60% (ISO ePM1.0 50% for the air supply optional)
Fan setting (factory setting) 0 1 2 3 max
Factory setting [m³/h] 50 100 150 250 325
Permissible resistance of duct system [Pa]2 5 9 19 21 43 59 118 100 200
Rated power (excl. preheater) [W] 6.1 6.4 8.2 9.7 15.4 19.4 46.9 61.4 87.2 116.5
Rated current (excl. preheater) [A] 0.08 0.08 0.09 0.11 0.16 0.19 0.42 0.53 0.73 0.94
Max. rated current (incl. preheater
switched on) [A] 6
Cos j0.341 0.343 0.389 0.394 0.430 0.439 0.492 0.507 0.521 0.542
Sound power
Ventilation capacity [m3/h] 100 150 150 200 200 250 325
Sound power level Lw(A)
Static pressure [Pa] 25 25 50 50 100 150 150
Casing radiation [dB(A)] 27 34 35 40 41 46 51
Duct “From dwelling’ [db(A)] 32 40 38 46 44 49 55
Duct ‘To dwelling’ [db(A)] 44 49 51 55 57 62 69
*) Duct noise including end correction
In practice the value may differ by 1dB(A) through measurement tolerances.
Resistance
of duct
system [Pa]
Note:
The stated
value in the
circle is the
capacity (in
Watt) per fan.
Flow rate [m3/h]
Version
7100832_202010 WOLF GmbH | 7
3.2 Connections and dimensions
The CWL appliance is available in a left-hand and right-hand version. With a left-hand version the “warm”
connections (from dwelling 3 and to dwelling 1) are on the left-hand side of the appliance; the condensate
discharge is then mounted at the right-hand opening below the appliance. With a right-hand version the
“warm” connections (1 & 3) are on the right-hand side of the appliance.
Left-hand version
4-0 connections 2-2 connections
Right-hand version
4-0 connections 2-2 connections
All dimensions in millimeters. Diameter of all collars is 160 mm
1 To dwelling 2 To outside 3 From dwelling 4 From outside
5 Electrical connections
6 Siphon connection
7 Exhaust air filter
8 Supply air filter
9 Mounting
Version xxxx
8 | WOLF GmbH 7100832_202010
3.3 Exploded view of appliance
The appliance shown above is a left-hand version: in the case of a right-hand version, the connector of the preheater,
bypass valve and the siphon connector are installed in mirror image!
1 Touchscreen 12 Heat exchanger
2 USB connector (X13) 13 Motor bypass valve
3 Service connector 14 Discharge filter
4 LED indicator 15 Bypass valve
5 Maximum protection preheater 16 Power cable 230 volt
6 Preheater 17 Relay output (X19) )
7 Temperature sensor 18 24 volt connector (X18)
8 Supply filter 19 eBus connector (X17)
9 Exhaust fan 20 24 volt connector (X16)
10 Siphon connector 21 Modbus/ bus connector (X15)
11 Supply ventilator 22 Multiple switch connector (X14)
Version xxxx
7100832_202010 WOLF GmbH | 9
4 Operation
4.1 Description
The appliance is supplied ready for plugging in and works automatically according to the standard
settings. The discharged dirty indoor air warms up the fresh clean outdoor air. That saves energy while
fresh air is supplied to the desired rooms.
The control system has four ventilation modes. The air flow rate can be adjusted for each ventilation
mode. The constant volume control system ensures that the ventilation balance between the supply and
exhaust fan is realized independent of the duct pressure.
If no external control is connected on to the appliance, then the appropriate ventilation model can be
chosen on the touchscreen display.
For external control a 4-way switch (® Connecting extra multiple switch with filter indication page 37)
can, for example, be chosen, but control is also possible with the BM-2 (® Connecting BM-2 page 39),
CO2 sensor(s) (® Connecting CO₂ sensor(s) page 41), a humidity sensor (® Connecting humidity
sensor page 40) or the App.
4.2 Bypass
The 100% bypass makes it possible to supply outside air, which is not heated up by the heat exchanger.
Particularly during summer nights it is desirable to supply cooler outside air. The warm air in the dwelling
is then replaced as much as possible by cooler outside air.
The bypass valve opens and closes automatically when a number of conditions are met (see table below
for bypass conditions).
Follow step numbers 2.1 to 2.6 in the settings menu in the user interface, (® Setting values standard
appliance page 46) in order to adjust the operation of the bypass valve.
Bypass valve preconditions
Bypass
valve open
▪ The outdoor temperature is higher than 10°C (adjustable between 7°C and 15°C at step no. 2.3) and
▪ the outdoor temperature is lower than the indoor temperature of the dwelling and
▪ the temperature from the dwelling is higher than 24°C (adjustable between 15°C and 35°C at step no.
2.2)
Bypass
valve closed
▪ The outdoor temperature is lower than 10°C (adjustable between 7°C and 15°C at step no. 2.3) C or
▪ the outdoor temperature is higher than the indoor temperature of the dwelling or
▪ the temperature from the dwelling is lower than the set temperature at step no. 2.2 in the settings menu
minus the set temperature at the hysteresis (step no. 2.4).
The appliance features a ‘Bypass boost’ function. This means that when this function is switched on (can
be switched at step 2.5) the ventilation mode with an opened bypass valve goes to maximum air flow rate
(adjustable at step no. 2.6).
4.3 Frost protection
To prevent freezing of the heat exchanger at low outdoor temperatures, the appliance features a frost
control.
Temperature sensors measure the temperatures in the appliance, when required a preheater is switched
on. If in the event of very low temperatures the preheater has insufficient capacity, stepless unbalance is
created in the appliance.
The software ‘recognizes’ the appliance.
Operation
10 | WOLF GmbH 7100832_202010
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