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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
10.3 Condensate drain ����������������������������������������������� 18 - Special measures are required at a water pres- 10.4 LWA 252 SOL: Connection of an external heat sure in excess of 1 MPa. generator ��������������������������������������������������������� 18 10.5 Installing extract air and exhaust air pipes ��������������� 18 - A 0.6 MPa safety valve must be installed on site. -
Page 3: Operation
Never adjust the ventilation and extract air valves inside the tal pollution) rooms. These have been adjusted during commissioning. Appliance disposal Never make any modifications to the internal equipment electrics or controls. www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... -
Page 4: Test Symbols
Material losses When operating with external switching devices that can Special features of the LWA 252 SOL interrupt the power supply to the appliance, such as time switches, energy management systems or home automa- This appliance version has an additional indirect coil integrated... -
Page 5: Operation
Control level 3 is reserved for contractors: Control level 1 (control flap closed) Here, the operating mode, such as standby operation, pro- grammed operation, constant day and setback operation of the DHW program can be adjusted. www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... -
Page 6: Display
SOLAR TEMP solar operation. With the parameter you can adjust the clock and set TIME/DATE summertime. Summertime is factory-set to begin on 25 March and to end on 25 October. | LWA 252 / LWA 252 SOL www.stiebel-eltron.com... -
Page 7: Adjustments At Control Level 2
Connecting the remote control RC 1 and the outside temperature OPERATION MODE sensor AFS 2 enables you to cool down your residence over night. For this, your contractor needs to set parameter NIGHT COOLING control level 3 to BACK www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... - Page 8 MAX SOLAR TEMP DHW TEMP SOLAR TEMP SOLAR DIFFEREN SET DHW T‐DAY SOLAR DIFFEREN SET DHW T‐DAY MAX SOLAR TEMP SET DHW T‐NGT MAX SOLAR TEMP SET DHW T‐NGT BACK ACTUAL DHW T BACK | LWA 252 / LWA 252 SOL www.stiebel-eltron.com...
- Page 9 22:00 h and you have set party mode for 2 hours, then setback mode would not start until midnight. HOL‐PARTY TIME HOLIDAY TIME YEAR START YEAR MONTH START MONTH START SET CLOCK YEAR SUMMER TIME BACK www.stiebel-eltron.com LWA 252 / LWA 252 SOL |...
- Page 10 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. BACK Actual or set temperatures will not be displayed if the correspond- ing sensor is not connected. | LWA 252 / LWA 252 SOL www.stiebel-eltron.com...
- Page 11 06:00 h. The second switching time pair runs from 08:00 until 09:00 h. The third switching times pair runs from 22:00 h START until 23:59 h. DHW PROGRAM STOP MON‐SUN START DHW START STOP DHW STOP MON‐SUN BACK www.stiebel-eltron.com LWA 252 / LWA 252 SOL |...
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Page 12: Remote Control Rc 1
AFS 2. The fan stages can also be changed manually. DHW STOP Continuously fan stage 1 Programmed mode Continuously fan stage 3 MON‐SUN back DHW PROGRAM | LWA 252 / LWA 252 SOL www.stiebel-eltron.com... -
Page 13: Cleaning, Care And Maintenance
Call your qualified contractor. For better and faster help, provide him with the type plate number (no. 000000-0000-000000). The type plate is located at the front top, on the right or left hand side of the casing. www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... -
Page 14: Installation
TAB: Technical connection conditions for connections to the LV mains. | LWA 252 / LWA 252 SOL www.stiebel-eltron.com... -
Page 15: Appliance Description
Open windows and doors. Extract fan Compressor Electric heater rod Indirect coils Condenser DHW cylinders Non-return valve Filter dryer Evaporator Expansion valve Extract air Exhaust air Exhaust air (optional) DHW circulation Cold water www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... -
Page 16: Design Operation
Undo the four screws from the non-returnable pallet. f Remove the washers. f Before removing the appliance from the pallet, remove the anti-vibration mounts from the pack supplied, and insert into the appliance. | LWA 252 / LWA 252 SOL www.stiebel-eltron.com... -
Page 17: Water Connection
“hot water outlet” connections. or by time switch. Insulate the DHW line in accordance with local regulations. Accurately maintain the order of fittings on the cold water side. Flush the line prior to installation. www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... -
Page 18: Condensate Drain
The exhaust air connector is located at the top of the equipment a condensate pump if there is insufficient fall. as standard. The following steps are necessary for conversion: 10.4 LWA 252 SOL: Connection of an external heat WARNING Electrocution generator Disconnect the power supply before carrying out any work on the appliance. -
Page 19: Power Supply
Route all connecting cables and sensor leads through the entries in the back panel (see chapter "Dimensions and connections"). f Push the power cable into the appliance through the cable entry on the back of the appliance. www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... - Page 20 Coat the collector sensor with heat conducting paste and in- sert it into the sensor well until it bottoms out. Provide thermal insulation for the collector sensor well and the roof outlet, which must be tightly sealed and UV resistant. | LWA 252 / LWA 252 SOL www.stiebel-eltron.com...
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Page 21: Commissioning
5 bar? Temperature sensor - Have all temperature sensors been correctly placed and connected? Material losses Operating the ventilation appliance is not permitted whilst building work is still in progress. www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... -
Page 22: Commissioning Overview, Control Unit Lwm
ON / OFF QUICK START RELAY TEST SOLAR PUMP IMM HEATER LCD TEST LWM SOFTWARE ANALYSIS HP RESET ON / OFF RUNTIME COMP STARTS COMP RUNTIME POWER STARTS POWER RUNTIME SOLAR STARTS SOLAR BACK | LWA 252 / LWA 252 SOL www.stiebel-eltron.com... -
Page 23: Commissioning The Lwm Control Unit
For setback ventilation we recommend reducing standard venti- lation by 30 %. 150 m /h*0.7=105 m³/h ---> 2.5 V. For party ventilation we recommend increasing standard ventila- tion by 30 %. 150 m /h*1.3=195 m³/h ---> 5.3 V. www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... - Page 24 01. Solar circuit pump 02. Immersion heater LCD TEST This function allows you to test the LCD display. Pressing PRG displays all available symbols. LWM SOFTWARE Display of the current software issue. | LWA 252 / LWA 252 SOL www.stiebel-eltron.com...
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Page 25: Commissioning Report
STARTS Power heater) RUNTIME SOLAR STARTS SOLAR When symbol flashes, but no fault code is displayed, the com- pressor has stopped due to a fault during defrosting (see param- eter EVAPOR MIN www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... -
Page 26: Maintenance, Cleaning And Safety Equipment
Pressure reducing valve (on-site provision) Check the valve for perfect function. Replace it if required. | LWA 252 / LWA 252 SOL www.stiebel-eltron.com... -
Page 27: Specification
DHW outlet Male thread DHW circulation Male thread G 1/2 Condensate drain Diameter g04 Exhaust air Nominal diameter DN 160 Extract air Nominal diameter DN 160 Exhaust air optional Nominal diameter DN 160 www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... - Page 28 G 1/2 Solar flow Male thread Solar return Male thread Condensate drain Diameter g04 Exhaust air Nominal diameter DN 160 Extract air Nominal diameter DN 160 Exhaust air optional Nominal diameter DN 160 | LWA 252 / LWA 252 SOL www.stiebel-eltron.com...
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Page 29: Wiring Diagram
Specification 14.1 Wiring diagram www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... -
Page 30: Fan Curve
Relay, high pressure indicator Earthing, door, bottom Control unit Flat pin connector Compressor Terminal, extra low voltage/partition wall Extract air fan 14.2 Fan curve X Flow rate [m Y External pressure [Pa] | LWA 252 / LWA 252 SOL www.stiebel-eltron.com... -
Page 31: Data Table
1860 Environment and recycling Width Depth We would ask you to help protect the environment. After use, Height when tilted 1985 1985 dispose of the various materials in accordance with national regulations. www.stiebel-eltron.com LWA 252 / LWA 252 SOL |... - Page 32 Deutschland Verkauf Tel. 05531 702-110 | Fax 05531 702-95108 | info-center@stiebel-eltron.de STIEBEL ELTRON GmbH & Co. KG Kundendienst Tel. 05531 702-111 | Fax 05531 702-95890 | kundendienst@stiebel-eltron.de Dr.-Stiebel-Straße 33 | 37603 Holzminden Ersatzteilverkauf Tel. 05531 702-120 | Fax 05531 702-95335 | ersatzteile@stiebel-eltron.de Tel.
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