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Related Manuals for STIEBEL ELTRON LWA 252
Summary of Contents for STIEBEL ELTRON LWA 252
- Page 1 OPERATION AND INSTALLATION CENTRAL VENTILATION APPLIANCE » LWA 252 » LWA 252 SOL...
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Page 2: Table Of Contents
10.1 Handling _____________________________________________________________ 15 10.2 DHW connection __________________________________________________ 15 10.3 Condensate drain __________________________________________________ 16 10.4 Solar connection (LWA 252 SOL) ________________________________ 16 10.5 Installing extract air and discharge air pipes ________________ 16 10.6 Power supply _______________________________________________________ 17 11. Commissioning ________________________________________________ 19 11.1 Checks before commissioning __________________________________ 19... -
Page 3: Operation
Contractors are responsible for adherence to all currently applicable regulations during installation and commissioning. Operate the appliance only when fully installed and with all safety equipment fitted. WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |... -
Page 4: Device Description
Description of the user interface Outside wall valves channel in fresh air, that replaces air expelled by the heat pump. Special features of the LWA 252 SOL VENTILATION This appliance version has an additional indirect coil integrated into the DHW cylinder that is designed for DHW heating with solar energy. -
Page 5: Operation
The indicator symbol skips such system parameters. SOLAR TEMP Example: The system parameter will be skipped if, at commissioning, the solar collector sensor was not connected. Values for these parameters, therefore, cannot be programmed. WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |... -
Page 6: Equipment Menu (Control Level 2)
You can extend the day mode by a few hours with the parameter. TEMPERATURES In parameter , you can scan the sensor temperatures of the ventilation and heat pump system, comparing set with actual temperatures. |LWA 252 | LWA 252 SOL WWW.STIEBEL-ELTRON.COM... - Page 7 VENTILATION 2$3 #'6 3 # 8 OPERATION MODE 2$3 #'6 3 # 8 STANDBY 2$3 #'6 3 -&3 AUTOMATIC 2$3 #'6 3 -&3 DAY MODE ACTUAL DHW T SETBACK MODE BACK party OPERATION MODE BACK WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |...
- Page 8 , then the solar circuit SET CLOCK pump starts. SOLAR TEMP TIME SOLAR DIFFEREN TIME SOLAR DIFFEREN YEAR MAX SOLAR TEMP MONTH MAX SOLAR TEMP BACK SET CLOCK SUMMER TIME BACK |LWA 252 | LWA 252 SOL WWW.STIEBEL-ELTRON.COM...
- Page 9 , you can scan the sensor temperatures of the ventilation system. TEMPERATURES MONTH START OUTSIDE TEMP START YEAR BACK Actual or set temperatures will not be displayed if the corresponding sensor is not connected. WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |...
- Page 10 You want to ventilate your residence daily at three different times, i.e. from 05:15 h until 08:00 h and then from 10:45 h to 14:00 h, finally from 17:30 h to 21:45 h. ,.- 24- BACK |LWA 252 | LWA 252 SOL WWW.STIEBEL-ELTRON.COM...
- Page 11 06:00 h. The second switching times pair runs from 08:00 h until 09:00 h. The third switching times pair runs from 22:00 h until 23:59 h. ,.- 24- DHW PROGRAM back ,.- 24- DHW PROGRAM DHW START DHW STOP WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |...
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Page 12: Remote Control Rc 1
OFF if the compressor is overloaded due to excessive ambient temperature, excessive extract temperature (>30 °C), or because of a fault in the refrigerant circuit. The thermoswitch automatically switches itself ON again. |LWA 252 | LWA 252 SOL WWW.STIEBEL-ELTRON.COM... -
Page 13: Installation
TRD 721 - Safety equipment to prevent excess pressure - safety valves. We approve steel, copper or plastic pipework for the cold water line. 7.2.3 Ventilation installation DIN 1946 T1, T6 - Ventilation and air conditioning WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |... -
Page 14: Device Description
— Without ventilation function — With an empty cylinder — Whilst building work is in progress Standard delivery — Operating and installation instructions — PT 1000 solar collector sensor (only with the LWA 252 SOL) Part no. 165818 Special accessories Description Part no. -
Page 15: Installation
Push the pipe past the O-ring until it bottoms out inside the connector. Tighten the screw cap until it meets the casing. This presses the O-ring against the pipe and secures the connector. WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |... -
Page 16: Condensate Drain
(e.g. free outlet into a siphon). Use a condensate pump if there is insufficient fall. 10.4 Solar connection (LWA 252 SOL) Pipe bends with union nuts are supplied with the appliances that are fitted with internal coils, to enable an easy connection to the solar thermal system. -
Page 17: Power Supply
Risk of damage When operating a dryer or a cooker hood that extracts air, ensure also, that a sufficiently large air flow rate is supplied to that equipment, independent of the ventilation equipment. WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |... - Page 18 Route all connecting cables and sensor leads through the entries Provide thermal insulation for the collector sensor well and the in the back panel (see chapter "Connection dimensions and roof outlet, which must be tightly sealed and UV resistant. variation in sizes"). |LWA 252 | LWA 252 SOL WWW.STIEBEL-ELTRON.COM...
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Page 19: Commissioning
1347 3392 1385 1423 1461 When measuring with a multimeter, the resistance values serve only to identify faulty or incorrect sensors. Measuring with a multimeter is too imprecise to test for accuracy. WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |... -
Page 20: Commissioning Overview, Control Unit Lwm
FROST PROTECT BACK NIGHT COOLING QUICK START RELAY TEST SOLAR PUMP IMM HEATER LCD TEST LWM SOFTWARE ANALYSIS HP RESET RUNTIME COMP STARTS COMP RUNTIME POWER STARTS POWER RUNTIME SOLAR STARTS SOLAR BACK |LWA 252 | LWA 252 SOL WWW.STIEBEL-ELTRON.COM... -
Page 21: Commissioning The Lwm Control Unit
Where required there is the option of stopping ventilation completely by setting 0 V. In case of Setback ventilation a 0.3-fold air change (curve 1) is recommended → 110 m³/h = 3.8 V. WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |... - Page 22 Pressing PRG twice deletes the runtime. 01. Solar pump 02. Immersion heater STARTS SOLAR This displays the number of starts of the solar circuit pump. Pressing PRG twice deletes the corresponding starts. |LWA 252 | LWA 252 SOL WWW.STIEBEL-ELTRON.COM...
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Page 23: Commissioning Report
Quick start Relay test OFF / ON LCD test LWM Software Analysis Heat pump reset OFF / ON Compressor runtime Compressor starts Immersion heater runtime Immersion heater starts Solar runtime Solar starts WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |... -
Page 24: Troubleshooting
13. Maintenance, cleaning and safety equipment 13.1 Maintenance The appliance operates under automatic control and requires no specific maintenance. Keep the air inlet and discharge apertures on the external wall free from snow and leaves. |LWA 252 | LWA 252 SOL WWW.STIEBEL-ELTRON.COM... - Page 25 Pressure reducing valve (on-site provision) Check the valve for perfect function. Replace it, if required. WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |...
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Page 26: Specification
LWA 252 SOL) Immersion heater Relay HP indication X2-7/8 outside temperature sensor High limit safety cut-out Compressor Suppressor filter Pressure switch HD Extractor fan Suppressor filter Klixon (compressor) Power supply / solar circuit pump |LWA 252 | LWA 252 SOL WWW.STIEBEL-ELTRON.COM... -
Page 27: Specification
Sensor well for collector or boiler sensor inches ½" ½" Discharge air / extract air connections to EN 255 part 3 to TNO (L20/F40) = extract air temperature 20 °C, extract air rel. humidity 40% WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |... -
Page 28: Fan Curve
INSTALLATION SPECIFICATION 14.3 Fan curve Volumenstrom [m³/h] Flow rate [m 14.4 Setting air volume flow Example standard ventilation (curve 3): [m²] |LWA 252 | LWA 252 SOL WWW.STIEBEL-ELTRON.COM... -
Page 29: Connection Dimensions And Variations
3 Cable entry for electrical cables 4 Condensate drain 5 DHW connection 6 DHW circulation connection 7 Flow, indirect coil 8 Return, indirect coil 9 Cold water inlet 10 Sensor well for collector or boiler sensor WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |... - Page 30 GUARANTEE | ENVIRONMENT AND RECYCLING |LWA 252 | LWA 252 SOL WWW.STIEBEL-ELTRON.COM...
- Page 31 NOTES WWW.STIEBEL-ELTRON.COM LWA 252 | LWA 252 SOL |...