STIEBEL ELTRON LWZ 304 Integral Installation Manual Download

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INSTALLATION

Settings

Humidity protection ventilation is activated when the ventilation is

switched off (stage 0). The fans are switched off during the first 24

hours after stopping ventilation. The humidity protection function

then checks every hour whether the rooms need to be ventilated.

For this, the fans operate for the duration of the "HUM. MASKING

TIME" at stage 1. If the measured value exceeds the set humidity

level, both fans operate until the set humidity level falls below the

"HUMIDITY HYSTERESIS". The humidity protection becomes active

as soon as the appliance starts following the restoration of the

power supply following a power failure.
A set humidity level function is implemented to protect the build-

ing from condensation forming on the inside of exterior walls. For

this, humidity of 100 % at 20 °C outside temperature is interpolat-

ed with the "HUM. THRESHOLD VALUE" at -10 °C outside temper-

ature. In order to take the type of building and the insulation of

the exterior walls into account, set parameter "HUM. THRESHOLD

VALUE" as follows:

- Brickwork, 25 cm thick, not insulated: 55 % (standard)

- Brickwork, 25 cm thick, 10 cm external insulation: 75 %

Fan output correction (stage 1/2/3) subject to humidity

For output stages 1, 2 and 3, the qualified contractor can activate

a correction subject to humidity that orients itself on the internal

relative humidity. This enables an increase in the air flow rate

when the relative humidity is higher.
In winter, an excessively high air flow rate can contribute to the

ambient air becoming too dry. This can be counteracted by a re-

duction of the air flow rate subject to the prevailing humidity level.
"SET HUMIDITY MIN": This parameter sets the lower limit of rel-

ative humidity.
"SET HUMIDITY MAX": This parameter sets the upper limit of rel-

ative humidity.
"OUTPUT INCREASE": This parameter determines the percentage

by which the fan output is to be increased, if the value set in the

"SET HUMIDITY MAX" parameter is exceeded by a margin greater

than the "HUMIDITY HYSTERESIS".
"OUTPUT REDUCTION": This parameter determines the percentage

by which the fan output is to be reduced, if the value set in the "SET

HUMIDITY MIN" parameter is not reached by a margin greater than

the "HUMIDITY HYSTERESIS". In the delivered condition, "OUTPUT

INCREASE" and "OUTPUT REDUCTION" are set to 0 %. This disables

the correction of fan output subject to humidity. The percentage

entered with the "OUTPUT INCREASE" and "OUTPUT REDUCTION"

parameters relates to the maximum fan output and not to the

currently selected fan output.

OVEN / FIREPLACE

If operating combustion equipment in the accommodation, you

can go to the "OVEN / FIREPLACE" menu to set how the ventilation

unit responds when a signal transmitter is connected to terminal

X4-13/14, connection Oven / fireplace, which switches when the

combustion equipment is operated.

MAIN MENU

VENTILATION

OVEN / FIREPLACE

N/O CONTACT OFF
N/C CONTACT OFF
N/O MONITORING.
N/C MONITORING

OFF

In the "OVEN / FIREPLACE" menu there are five options, of which

only one can ever be enabled at a time (indicated by a filled box).

If you select a new option, the current setting will be disabled.

Option

Effect

OFF

No action

N/O CONTACT OFF With a 230 V input signal, the supply air fan, extract air

fan, exhaust air fan and compressor are switched off.

N/C CONTACT OFF

With a 0 V input signal, the supply air fan, extract air

fan, exhaust air fan and compressor are switched off.

N/O MONITORING

With a 230 V input signal, the extract air fan, exhaust air

fan and compressor are switched off when the supply air

fan stops.

N/C MONITORING

With a 0 V input signal, the extract air fan, exhaust air

fan and compressor are switched off when the supply air

fan stops.

AIR/AIR HE (air/air heat exchanger)

MAX DEFROST DUR.

Defrost terminates if, during defrosting the air/air heat exchang-

er, the maximum defrost duration is exceeded.

DEFR START THRESHOLD

Here, you specify the speed change (in %) from which defrost

begins.

FILTER SPEED

The air flow rate is continuously adjusted. If the filter is dirty, the

fan speed increases. If it is above the start value by the set value

(in %), the filter symbol shows that the filter is dirty.

SERVICE

RUNTIME FILTER

This value indicates how many days have passed since the last

filter reset.

RESET FILTER

When you set this parameter to "ON", a filter reset will be trig-

gered.

Summary of Contents for LWZ 304 Integral

Page 1: ...INSTALLATION Central ventilation unit with heat recovery LWZ 304 Integral LWZ 304 Trend LWZ 404 Trend ...

Page 2: ...ract air and supply air pipes 22 6 Commissioning 23 6 1 Checks before commissioning 23 6 2 Commissioning 24 6 3 Recommissioning 26 7 Settings 26 7 1 Menus and parameters 26 INFO 26 DIAGNOSIS 26 PROGRAMS 26 STANDARD SETTING 26 SETTINGS 26 HEATING 26 DHW 27 VENTILATION 29 DRY HEATING PROGRAM 31 COMMISSIONING 31 CONTRACTOR 32 ENTER CODE 32 FAULT SEARCH 32 SWITCH ON MANUALLY 32 EVAPORATOR 32 REFRIGERA...

Page 3: ...vant documents 317238 LWZ 304 404 Trend Integral Operation 1 2 Standardised output data Explanations to determine and interpret the specified standardised output data 1 2 1 Standard EN 13141 7 EN 14511 EN 16147 The output data specifically mentioned in text diagrams and technical datasheets has been calculated according to the test conditions of the standard shown in the heading of this section Ge...

Page 4: ...ation system and combustion equipment Alternate operation Operation on alternate sides means that when the combustion equipment is commissioned the mechanical ventilation system is switched off and cannot be started Note Operation on alternate sides is not recommended be cause in this case central heating and DHW heating are carried out by the electric emergency booster heater Simultaneous operati...

Page 5: ... Required accessories Air hose with thermal insulation 4 m Thermally insulated wall outlet with external wall grille 3 3 Additional accessories Transport aid 233485 Additional programming unit with wall mounted casing Spare filter set Diverter hood enables the appliance to be sited in rooms with 2 2 m head height Silencer DN 315 Relay set WPM RBS Segmented anode Starting current limiter 25 A part ...

Page 6: ...nstallation site Minimum clearances Maintain a minimum clearance on the r h side of the appliance for service work Never install the appliance in wet rooms The room in which the appliance is to be installed must meet the following conditions The room must be free from the risk of frost The floor must have sufficient load bearing capacity In ad dition to the appliance weight also take that of the c...

Page 7: ... apertures toward neighbouring living room or bedroom windows 4 3 Sound emissions Sound insulation for rooms adjacent to the installation room When the appliance is in operation sound emissions can occur which may be a nuisance in adjacent rooms This is especially the case if the installation room adjoins a living room or bedroom To prevent noise pollution sound attenuation measures are neces sary...

Page 8: ...m 3 Gypsum fibre board 10 mm Sound attenuation 55 dB A Sound attenuation of 55 dB A can be achieved using for example a lightweight twin wall of timber frame construction with full in sulation and 30 mm parting line The cross section of the timber supports should be 60 x 60 mm The wall must have 12 5 mm plasterboard panelling on both sides 3 1 3 3 3 2 D0000047126 1 Parting line 30 mm 2 Timber supp...

Page 9: ...hout packing and with out using a pallet its outer casing may be damaged Remove the side panels and doors in such cases 4 6 1 Function module To protect the appliance against damage transport it vertically inside its packaging Where space is restricted you can also tilt the appliance at an angle to move it To make handling easier you may attach a transport aid on the back of the function module Th...

Page 10: ...ger 3 Outdoor air filter cassette f f Remove the upper front panel f f Remove the round knock out from the back panel of the function module f f Cut a hole for a folded spiral seam tube DN 160 in the centre of the knock out in the EPS thermal insulation f f Push the folded spiral seam tube through the hole max 30 mm deep f f Seal the gap between the folded spiral seam tube and the EPS insulation w...

Page 11: ...h water Note The adjustable feet must not be fully screwed in oth erwise you will not be able to push the joining bracket between the bottom panel and the foot 26_04_01_0552 f f Undo the cover screws on the cylinder module f f Reach through the port on the r h side of the cylinder mod ule and push the cylinder module cover upwards f f Remove the cylinder module cover D0000039733 1 1 Fixing screw o...

Page 12: ...ion module This air hose must run inside the curved groove cut into the thermal insulation f f Ensure that this air hose is seated correctly Note The adjustable feet must not be fully screwed in oth erwise you will not be able to push the joining bracket between the bottom panel and the foot f f Push the cylinder module further towards the function mod ule so that the rear r h adjustable foot of t...

Page 13: ...f the appliance and hook it into the same slots but this time from the outside D0000053516 1 2 3 1 DHW flow 2 Heating flow 3 Common return The hydraulic connection between the function and cylinder module is provided by three pipes DHW flow heating flow and common return f f Make sure that the caps have been removed from the pipes 5 3 1 How the push fit connectors work Material losses Never instal...

Page 14: ...ted by a qualified contractor in accordance with the water installation drawings which are part of the technical guides You can use the push fit connectors supplied or ball valves to make the connection of the flow and return Note Deburr the pipe ends A filter ball valve is provided for the return Two union nuts and two short flanged copper pipe ends are provided for fitting a ball valve f f As a ...

Page 15: ... connection of the underfloor heating thermostat is shown in chapter Specification Connection examples Material losses In the ACTUAL VALUES menu the appliance offers the option to display the water pressure f f Ensure that the pump does not run without water 5 5 Water connection Material losses Never install the push fit connectors in the DHW line Only install the push fit connectors in the heatin...

Page 16: ...an check the water pressure in the heating circuit on the programming unit with the PRESSURE HTG CIRC value f f Determine the PRESSURE HTG CIRC value for one of the three favourites For this navigate from the default display to the FAVOURITES parameter WEDNESDAY 10 SEP 14 10 23 h PRESSURE HTG CIRC DHW TEMPERATURE 1 3 bar 35 0 C 18 0 C FLOW TEMPERATURE DAY MODE 26_04_01_0292 Note Proceed carefully ...

Page 17: ...es MCBs etc Material losses The specified voltage must match the mains voltage Ob serve the type plate Material losses The cable entries at the back of the appliance are closed with cable grommets To prevent an ingress of water cut as small a hole as possible in the cable grommet 5 8 1 General information The electrical data is given in the chapter Specification Data table You will need a BUS cabl...

Page 18: ... window with passive cooling for example 5 8 6 Power OFF Connect the signal from the power time switch to the X4 power supply terminal see chapter Commissioning Power OFF 5 8 7 External pumps PWM Note The power supply to the external pumps is not provid ed via the appliance The X5 terminals only deliver low voltages Externe Pumpen X5 GND GND CAN H Ub PWM HK2 PWM SOL 0 10V HK2 0 10V SOL Td Td Tx Tx...

Page 19: ...mperaturen X5 D0000060874 Ta Outside temperature sensor Tv Mixer circuit flow temperature sensor Tr Room temperature sensor Ts No function Tx No function Td No function Outside temperature sensor AFS 2 26_03_21_0052 The outside temperature sensor should be freely exposed to the elements Never fit it above windows doors light wells or air ducts and never subject it to direct insolation Install the ...

Page 20: ...H High Ub f f Connect the external programming unit with a BUS cable type J Y St 2x2x0 8 mm to terminal X5 GND CAN L CAN H Ub The BUS cable should not be longer than 50 m Note Observe correct separation when installing the BUS cable the mains power cable and the sensor leads 5 8 12 LWZ 304 404 Trend Internet Service Gateway The Internet Service Gateway ISG enables you to operate the appliance with...

Page 21: ... fitting the air hoses Air hoses guide the intake air outdoor air from the outside to the heat pump and route the discharge air exhaust air to the outdoors see chapter Required accessories These are highly flexible thermally insulated and self extinguishing in case of fire in accordance with ASTMD 1692 67 T 5 10 1 Information on routing the air hoses f f Use a sharp knife to trim the hose to the r...

Page 22: ...ses Always cover the air intake and discharge with wire grilles and secure the hoses against slippage Hose connection panels or wall outlets with hose connection and grilles are available for hose connections to exterior wall knock outs or cellar windows 5 11 Installing extract air and supply air pipes Install with the material you can obtain from us or with commer cially available folded spiral s...

Page 23: ...structions and chapter Settings of these installation instructions 6 1 Checks before commissioning 6 1 1 Heating system Are all connections on the central heating and DHW side con nected and tightened Was the heating system filled to the correct pressure and vented and was the quick acting air vent valve opened Has the condensate hose been routed correctly Was a vessel placed beneath the safety va...

Page 24: ... de mand the appliance components pumps fans start The tap symbol appears in the display The appliance is in DHW heating mode After a while fault F07 is indicated which shows that the exhaust air filter has failed This is normal as the exhaust air filter is sup plied via the compressor MCBs fuses f f Switch manual mode ON f f In the DHW menu set the DHW SET MANUAL parameter to 10 C The appliance s...

Page 25: ...PUMP SPEED HEATING parameter so that the mini mum flow rate required for the system operation is assured see chapter Specification Data table You can check the current flow rate via the value of the previously set favourite FLOW RATE Note Never change the PUMP SPEED DHW parameter The pump speed for DHW operation was optimised at the factory Flow rate with buffer cylinder or low loss header f f Set...

Page 26: ...p alone heats the building subject to the output being sufficient SETTINGS HEATING ROOM TEMPERATURES HC1 ROOM TEMPERATURES HC2 HEATING CURVE HC1 HEATING CURVE HC2 STANDARD SETTING HYSTERESES STANDARD SETTING INTEGRAL COMPONENT The control deviation i e the differential between the set heating circuit temperature and the actual heating circuit temperature is totalled over time Every time the adjust...

Page 27: ...erature 19 C Displayed temperature 21 C New parameter value 2 SUPPR TEMP MEAS After the heating circuit pump has started the actual flow and return temperatures remain suppressed for the time set under the SUPPR TEMP MEAS parameter The actual sensor values are only used to calculate the heating system heat demand after expiry of this time HYSTERESES HYSTERESIS 1 HYSTERESIS 2 HYSTERESIS 3 HYSTERESI...

Page 28: ...meter For effective pasteurisation you should set this parameter to at least 55 C As temperatures above 50 C are not reached with the heat pump alone the enabled electric emergency booster heater stages always switch on during the heat up process for pasteurisation PASTEURISATION TIME In the parameter PASTEURISATION you have set how often pas teurisation to protect against the growth of legionella...

Page 29: ...supports the cooling with cool night air when a window is open In this case open the windows in rooms sup plied with air living room nursery and bedrooms for example using the WINDOW OPEN control signal SUPPLY AIR The extract air fan is stopped and the supply air fan output is increased by 20 In this case you do not have to open the windows However this option is less effective and does not work i...

Page 30: ...ON This parameter determines the percentage by which the fan output is to be reduced if the value set in the SET HUMIDITY MIN parameter is not reached by a margin greater than the HUMIDITY HYSTERESIS In the delivered condition OUTPUT INCREASE and OUTPUT REDUCTION are set to 0 This disables the correction of fan output subject to humidity The percentage entered with the OUTPUT INCREASE and OUTPUT R...

Page 31: ...ancelled set the START parameter to OFF Drying out can take a long time as the heat pump output is in sufficient for this purpose If necessary also switch on the boost er stages Always expect a considerably higher energy demand during drying out The dual mode point is not taken into consideration during drying out The booster stages are always enabled when the controller detects a deviation above ...

Page 32: ... option ON in this parameter the fault list is cleared STOP EVENT All actual values and switching states of the appliance are re corded in a circular memory With STOP EVENT the recording stops and it may be possible to draw conclusions from it as to the cause of the fault SWITCH ON MANUALLY Here you can switch appliance components or functions on man ually To do so you have to enter the customer s...

Page 33: ... min in winter For this purpose set MAXIMUM CYCLES P55 to 50 and OUTSIDE TEMP MAX CYC P56 to 0 C Below 0 C the pump therefore starts no more than 50 times a day This prevents the electric emergency booster heater being started while the compressor is blocked although the compressor output should still be sufficient Note In summer mode and in exclusive DHW mode the OUT SIDE TEMP MIN CYC parameter w...

Page 34: ...PASTEURISATION TEMP parameter may be set to 10 C This value is preset There is a risk of legionella bacteria growth if only little DHW is used Legionella bacteria are generally only a danger to people with weakened immune systems 7 2 3 Heating curve Adjust the heating curve carefully as the heat pump efficiency will be reduced with an increasing flow temperature See chapter Operation MAIN MENU Set...

Page 35: ...en the hot water taps on all draw off points 1 D0000039620 1 Drain connection of the DHW cylinder f f Fully drain the DHW cylinder f f Drain the heating circuit In the case where the appliance is to be returned into use again later first carry out the following f f Remove the air filters f f Carry out all service related cleaning tasks such as clean ing the condensate pan and the cross countercurr...

Page 36: ...t If there is a fault in the system a fault message appears on the display There is a fault memory so you can check earlier faults This is found under MENU CONTRACTOR FAULT SEARCH The programming unit shows the ten most recent faults Some fault messages prompt you to press the reset button 1 D0000039737 1 Electronics reset button D0000039646 1 1 Reset button for high limit safety cut out Note If t...

Page 37: ... repeats 04 Low pressure switch The low pressure switch has re sponded five times in five hours The heat pump will shut down The exhaust air fan is faulty Fault 07 should then also be in the fault list Fault in defrost detector Remove the defrost hose see chapter Maintenance and cleaning Cleaning the evaporator and check whether it has iced up Then push the hose on again to the same length Heat pu...

Page 38: ...ult occurs ten times in a row Press the electronics reset button If this faults occurs repeatedly notify customer support 18 Pressure sensor heating circuit The heating circuit pressure sen sor is not providing a plausible signal 19 Defrost duration of cross countercurrent heat exchanger Defrosting is not completed after expiry of the defined time The fault is displayed until the defrost process h...

Page 39: ...be blocked Only frost protection remains effective Select a higher pump speed Open the heating circuits Balance the heating circuits Isolate the appliance across all poles from the mains power for approx one minute If the pump repeatedly fails to start inform customer support 37 Min water pressure The overpressure is less than 0 05 MPa 0 5 bar At the same time the minimum flow rate has not been ac...

Page 40: ...h the cross countercurrent heat exchanger with warm water f f Let the cross countercurrent heat exchanger dry out 10 2 Cleaning the outdoor air filter Check and clean the outdoor air filter at least once a year The outdoor air filter is fitted downstream of the cross counter current heat exchanger 1 2 3 26_04_01_0613 1 Upper front panel 2 Cross countercurrent heat exchanger 3 Outdoor air filter ca...

Page 41: ...91 f f Then remove the r h half of the evaporator cover Material losses Do not use any cleaning agents just water Material losses Do not use a high pressure cleaner otherwise the evap orator fins may be bent f f Spray water across the evaporator fins f f Remove the water from the appliance using a wet suction device f f Remove contaminants and blockages Note Check the condensate drain regularly at...

Page 42: ...stem fill pressure and adjust if required 10 6 Replacing the anode f f Isolate the appliance from the power supply f f Close the shut off valve in the cold water supply f f Remove the cover from the cylinder module f f Remove the l h front panel of the cylinder module f f Briefly open the lowest DHW draw off point 1 D0000039620 1 Drain connection of the DHW cylinder f f At the DHW cylinder drain v...

Page 43: ...inlet Diameter mm 22 22 22 c06 DHW outlet Diameter mm 22 22 22 c09 DHW circulation entry c12 Safety valve drain Diameter mm 19 19 19 d45 Condensate drain Diameter mm 22 22 22 e01 Heating flow Diameter mm 22 22 22 e02 Heating return Diameter mm 22 22 22 g03 Outdoor air Nominal diameter DN 315 DN 315 DN 315 g04 Exhaust air Nominal diameter DN 315 DN 315 DN 315 g05 Extract air Nominal diameter DN 160...

Page 44: ... 3 L E P N 3 N PE 50Hz 400V 3 N PE 50Hz 400V 1 N PE 50Hz 230V L1 U V E PE 5 26_04_01_0600 3 2 1 4 Supply from low tariff electricity meter 5 1 Heat pump 2 Electric emergency booster heater 3 Fan control unit 4 Underfloor heating thermostat option or safety equipment terminal for oven fireplace 5 Time switch for power OFF periods Example 3 Blocking time for electric emergency booster heater and hea...

Page 45: ...itor P1 High pressure transducer P2 Signal anode P3 Low pressure transducer P4 Pressure sensor heating water P5 Flow sensor heating S3 Reset button S4 Float switch bottom panel X1 Lower terminals X3 Power supply X4 Control voltage X5 Terminal external temp sensor and CAN BUS X6 Booster heater power supply A1 X1 Connector X1 temperature sensor 8 pin A1 X2 Connector X2 temperature sensor 12 pin A1 X...

Page 46: ...7 M11 10 9 8 9 1011 131415 0 3 X 3 3 X 2 9 kW 2 9 kW 2 9 kW 1 E X3 X4 12 EVU g n u t f ü l l l e n h c S L S F r e t s n e A f u A F 14 9 8 U V E 2 7 3 X 1 L 2 L 3 L Steuerung 2 2 X u z 5 3 X 6 M 1617 M U V 6 L3 1819 20 4 2122 4 8 3 X 9 3 X C S R 6 4 X 7 4 X 4 2 X 3 2 X 1 3 X n e l h ü K u z 4 3 X 5 M u z 3 3 X 4 M 4 4 4 X Z1 2 Z u b u b l b l b e y n g 0 4 X 0 9 7 0 1 8 0 0 8 0 4 6 0 6 7 0 7 7 0 ...

Page 47: ... z r a w h c s 14 11 5 9 8 13 1 P5 1 3 4 2 weiss 5 grau z r a w h c s b l e g t o r e g n a r o u a r g 2 gelb weiss braun grün weiss gelb grün braun 3 M weiss weiss rot schwarz 1 2 3 4 1 3 4 b U 0 1 9 8 e m m e l K 5 3 X 9 X 5 2 X 2 2 X M W P L O S V 0 1 0 L O S D N G L O S M W P 2 K H V 0 1 0 2 K H D N G 2 K H 13 14 15 16 17 18 19 0 2 1 2 V 5 V 5 V 5 D N G D N G D N G h c e l b n e d o B e n n a...

Page 48: ...perature C Y Heating output kW 1 Flow temperature 35 C 2 Flow temperature 35 C with heat recovery 3 Flow temperature 55 C 4 Flow temperature 55 C with heat recovery LWZ 404 Trend 0 1 2 3 4 5 6 7 8 9 10 11 20 15 10 5 0 5 10 15 20 25 30 1 2 3 4 D0000039890 X Outside temperature C Y Heating output kW 1 Flow temperature 35 C 2 Flow temperature 35 C with heat recovery 3 Flow temperature 55 C 4 Flow tem...

Page 49: ...5 LWZ 404 Trend 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 60 80 100 120 140 160 180 200 220 240 260 280 300 320 1 0 35 0 40 0 45 0 50 0 55 2 D0000065375 Application range X Air flow rate m h Y Average value static pressure Pa 1 Maximum fan curve 2 System curves 0 35 Specific power consumption 0 35 Wh m 0 40 Specific power consumption 0 40 Wh m 0 45 Specific power consumption 0 45 Wh m 0...

Page 50: ... 0 4 0 6 0 8 1 1 2 1 4 1 6 1 8 1 2 3 4 D0000039604 X Flow rate m3 h Y Pressure hPa 1 Pump rate 100 2 Pump rate 85 3 Pump rate 65 4 Pump rate 45 11 8 Application range 11 8 1 Application range for heating LWZ 304 Integral LWZ 304 Trend LWZ 404 Trend 30 20 10 0 10 20 30 40 0 10 20 30 40 50 60 70 1 84_04_01_0032 1 Application range limits X Outside temperature C Y Flow temperature C ...

Page 51: ...m The collector sensor is a PT 1000 sensor PT 1000 sensor PTC sensor Temperature in C Resistance in Ω Resistance in Ω 30 862 20 922 1367 10 961 1495 0 1000 1630 10 1039 1772 20 1078 1922 25 1097 2000 30 1117 2080 40 1155 2245 50 1194 2417 60 1232 2597 70 1271 2785 80 1309 2980 90 1347 3182 100 1385 3392 110 1423 120 1461 Note When measuring with a multimeter the resistance values serve only to ide...

Page 52: ...02 dB A 59 60 60 Application limits Min application limit heat source C 20 20 20 Max application limit heat source C 35 35 35 Max pressure drop outdoor air Pa 25 25 25 Min installation room volume m 8 9 12 DHW temperature with heat pump at A2 C 50 50 50 Hydraulic data Cylinder capacity l 235 235 235 Energy data Energy efficiency class W55 heat pump A A A Energy efficiency class DHW heating with lo...

Page 53: ... DN 160 Condensate drain mm 22 22 22 Outdoor air exhaust air connection mm 410x155 410x155 410x155 Water quality requirements Water hardness dH 3 3 3 Conductivity softening μS cm 1000 1000 1000 Conductivity desalination μS cm 20 100 20 100 20 100 Chloride mg l 30 30 30 Oxygen 8 12 weeks after filling softening mg l 0 02 0 02 0 02 Oxygen 8 12 weeks after filling desalination mg l 0 1 0 1 0 1 pH val...

Page 54: ...54 LWZ 304 Trend LWZ 404 Trend LWZ 304 Integral www stiebel eltron com NOTES ...

Page 55: ...ENGLISH www stiebel eltron com LWZ 304 Trend LWZ 404 Trend LWZ 304 Integral 55 NOTES ...

Page 56: ...w stiebel eltron cz Finland STIEBEL ELTRON OY Kapinakuja 1 04600 Mäntsälä Tel 020 720 9988 info stiebel eltron fi www stiebel eltron fi France STIEBEL ELTRON SAS 7 9 rue des Selliers B P 85107 57073 Metz Cédex 3 Tel 0387 7438 88 Fax 0387 7468 26 info stiebel eltron fr www stiebel eltron fr Hungary STIEBEL ELTRON Kft Gyár u 2 2040 Budaörs Tel 01 250 6055 Fax 01 368 8097 info stiebel eltron hu www s...

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