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E09.012.246 Manual S-WG 

6 

1.2 

Important technical warnings and guidelines 

 

For  

FAULT CODES

 in this manual see 

Ch. 16 

on page

 104

 

 
The  STREBEL  Domestic  Hot  Water  systems  will,  for  a  long  period,  comfortably  meet  your  requirement  of  hot 
water  of  the  right  temperature  at  the  right  hour,  provided  that  a  few  important  conditions  have  been  fulfilled   
regarding the installation. 
Please follow all instructions and recommendations presented in this manual by  STREBEL, especially the ones 
concerning the next important topics:  
 
- 

Water quality (also see § 8.1 on page 36) 

 

A  first  necessary  condition  is  the  quality  of  the  water  to be  heated  in  the  DHW  water  heater.  Three  values 
matter: hardness, total  amount of dissolved solids and acidity. If  water quality  does NOT meet the require-
ments, the system may be seriously damaged. 

 

  Hardness should not exceed 205 PPM CaCO

3

 (11.5°dH) 

  TDS (Total Dissolved Solids) should not exceed 450 PPM 

  Hardness and TDS together may not exceed 450 PPM 

  pH-value should be between 6.5 and 7.5, measured cold 

The actual values can be retrieved by contacting your local water supplier. 

 
If water quality doesn’t meet the abovementioned requirements, a water treatment installation should be in-
stalled to improve water quality to the required levels, if possible. 
 

- 

Water flow velocity and pump choice (see § 9.5 on page 51) 

 

For  a  given  combination  of  water  heaters  and  tanks,  pump  choice  is  very  important  with  respect  to the  re-
quired flow velocity. 
STREBEL has done the calculations and provides a number of tables in which  you can find the right pump 
type suitable for your particular installation. 
 

- 

Water flow velocity and piping diameters and lengths (see § 9.4 from page 47 on) 

 

The arguments that hold for pump choice, hold for piping design as well: all piping components added up are 
giving  a  certain  total  resistance  which  should  not  exceed  a  critical  value  at  which  the  pump  cannot  realize 
the required flow velocity anymore. 
STREBEL  has  done  the  calculations  and  provides  a  number  of  tables  in  which  you  can  find  the  piping  re-
quirements suitable for your particular installation. 
 

Following  the  instructions  and  recommendations  given  in  the  referred  paragraphs  will  highly  improve  the  func-
tioning and considerably lengthen the life time of your STREBEL DHW system. 
 

 

 

 

Furthermore, for all STREBEL appliances the next instructions and recommendations apply: 
 

!

 

Never use aluminium or aluminium containing flue gas outlet 

 

!

 

Always fill the siphon before commissioning the water heater 

 

!

 

Always  set  the  gas  valves  during  commissioning  the  water  heater,  for  the  first  time  and  after  mainte-
nance and/or installation changes 

 

!

 

Never change the parameters P2LC, P2LD, P2ML en P5BI 

 

!

 

Never place an isolation valve between the safety valve and the water heater 

 

!

 

In a log, keep track of all situations regarding the appliance: 

 

what, when , by whom , what actions and/or changes, what communication has been performed 

 

 

 

Содержание S-WG 100

Страница 1: ...STREBEL S WG 80 100 120 150 180 Wall hung high efficiency water heater Installation Operating and Maintenance Manual 2015 05 06 v2 1 ...

Страница 2: ...36 8 2 FROST PROTECTION 36 8 3 LEGIONELLA PROGRAM 36 8 4 FLOW MONITORING 37 8 5 WATER PRESSURE SWITCH 37 9 THE S WG SANITAIRY SYSTEM INSTALLATION INSTRUCTIONS 38 9 1 THE S WG SYSTEM 38 9 1 1 Stand alone set up 38 9 1 2 Cascade set up 39 9 1 3 Control general 41 9 1 4 Cascade control 41 9 2 WATER HEATER AND TANK CONNECTIONS AND CONNECTION SIZES 42 9 2 1 Connecting the tank to the water heater 42 9 ...

Страница 3: ...WATER HEATER 93 12 1 FIRST FLUSHING THE WATER HEATER WITH WATER 93 12 2 SECOND FILLING VENTING THE WATER HEATER AND THE SYSTEM 93 12 3 THIRD CHECK THE WATER FLOW 93 13 STARTING THE WATER HEATER 95 13 1 GENERAL 95 13 2 FIRING FOR THE FIRST TIME 95 14 ADJUSTING AND SETTING THE BURNER 96 14 1 INTRODUCTION 96 14 1 1 Adjustment tables 96 14 1 2 Setting screws gas valve s drawings 97 14 1 3 Adjustment a...

Страница 4: ...ted without approval the water heater certification is invalid Commissioning maintenance and repair must be done by a skilled installer engineer according to all applicable standards and regulations What should one do when there is the smell of gas Do NOT use any electrical equipment Do NOT press any switches Close the gas supply Ventilate the room open the windows and or outside plant room doors ...

Страница 5: ...n of water heaters and tanks pump choice is very important with respect to the re quired flow velocity STREBEL has done the calculations and provides a number of tables in which you can find the right pump type suitable for your particular installation Water flow velocity and piping diameters and lengths see 9 4 from page 47 on The arguments that hold for pump choice hold for piping design as well...

Страница 6: ...G water heater and all supplied parts will become invalid Minimum water pressure 1 bar Fuel used should have sulphur rates that comply with the next values a maximum annual peak over a short period of time of 150 mg m 3 and an annual average of 30 mg m 3 maximum Combustion air must be free of contents of chlorine ammonia alkali agents The air near a swimming pool a washing machine or a laundry is ...

Страница 7: ...or B 10 bar 150 kW E04 015 090 S WG 100 27112 Prescor B 10 bar 150 kW E04 015 090 S WG 120 27112 Prescor B 10 bar 150 kW E04 015 090 S WG 150 27112 Prescor B 10 bar 150 kW E04 015 090 S WG 180 29007 Prescor B 1 10 bar 250 kW E04 015 091 The S WG water heater and tank should be installed by a skilled installer according to all applicable standards and regulations for tap water installations Use the...

Страница 8: ...5 Mount remote pipe sensor as close as possible to the tank 6 Drain valve recommended 7 Hot and cold water mixers SAFETY COMPONENTS NB The picture shows an example of a functional installation The safety components as shown in the picture are NOT necessarily conform the applicable standards and regula tions ALWAYS have the installation installed by a skilled installer Safety must be added ac cordi...

Страница 9: ... 75 3 60 14 60 4 76 17 57 Propane gas G31 min max m st h 0 60 3 04 0 70 3 77 1 06 4 54 1 39 5 65 1 84 6 79 Butane gas G30 min max 1 B P m st h 0 45 2 29 0 53 2 85 0 99 3 44 1 05 4 28 1 40 5 15 Gas supply pressure nom G25 2 mbar 25 Gas supply pressure nom G20 2 mbar 20 Gas supply pressure nom G31 2 mbar 30 37 Gas supply pressure nom G30 2 mbar 50 EMISSION CO2 flue gas G25 G20 min max 3 8 7 9 0 8 7 ...

Страница 10: ...C remote flow temperature set point control 0 10 VDC connection available The water temperature can be controlled by an external 0 10 VDC signal When a number of water heaters are cascaded the signal should be directed to the master only Less than 1 Volt will switch off the water heater s Time program Time programs with three programmable periods per day are available These time programs are activ...

Страница 11: ...concentric S WG80 S WG100 S WG120 S WG80 S WG100 S WG120 FG flue gas Ø80 Ø100 Ø80 Ø100 AI air inlet Ø80 Ø100 Ø125 Ø150 I cold water inlet R 1 swivel R 2 swivel R 1 swivel R 2 swivel O hot water outlet R 1 swivel R 2 swivel R 1 swivel R 2 swivel G gas R male C condensate flexible hose Ø25 21 x 750 mm dimension D 175 160 ...

Страница 12: ... PIPE CONCENTRIC Connections mm twin pipe concentric S WG 150 180 S WG 150 180 FG flue gas Ø130 Ø100 AI air inlet Ø130 Ø150 I cold water inlet Rp 2 swivel Rp 2 swivel O hot water outlet Rp 2 swivel Rp 2 swivel G gas male R 1 R 1 C condensate flexible hose Ø25 21 x 750 mm ...

Страница 13: ...E09 012 246 Manual S WG 14 3 3 S WG tanks 300 Ltr 450 Ltr ...

Страница 14: ...E09 012 246 Manual S WG 15 750 Ltr ...

Страница 15: ...E09 012 246 Manual S WG 16 3 4 Cascade frames S WG80 S WG180 Frames for two three and four water heaters S WG80 up to S WG180 ...

Страница 16: ... Rp 2 R 605 1110 n v t 990 990 2 1015 133 160 177 314 Rp 2 Rp 2 R 605 n v t n v t 990 990 1 510 133 160 177 314 Rp 2 Rp 2 R n v t n v t n v t 990 990 water heaters S WG 80 4 1980 133 175 177 310 Rp 1 Rp 1 R 590 1080 1570 990 990 3 1520 133 175 177 310 Rp 1 Rp 1 R 605 1110 n v t 990 990 2 1015 133 175 177 310 Rp 1 Rp 1 R 605 n v t n v t 990 990 1 510 133 175 177 310 Rp 1 Rp 1 R n v t n v t n v t 99...

Страница 17: ...ure Open Therm RCW modulating E04 016 645 9 Software set for diagnose programming and temperature read out E09 000 105 10 Hot water tank stainless steel 300 litres E66 000 203 11 Hot water tank stainless steel 450 litres E66 000 204 12 Hot water tank stainless steel 750 litres E66 000 205 13 Interface cable between water heater control and computer laptop with USB con nection E04 016 586 4 2 Unpac...

Страница 18: ...y of fresh air to the water heater location Both the air supply and the flue gas tubes must be connected to the outside wall and or the outside roof The installation area must be dry and frost free The water heater has a built in fan that will generate noise depending on the total heat demand The wa ter heater location should minimise any disturbance this might cause Preferably it is suggested to ...

Страница 19: ...upplied While marking the holes ensure that the suspension bracket or frame is perpendicular and the water heater does not lean forward If necessary adjust the position with the adjusting bolts at the lower rear side of the back panel see drawing When the adjusting bolts aren t sufficient fill the gap behind the bolts to get the water heater in position The exact water heater position lies between...

Страница 20: ...he fixation of the locking plate 5 2 2 TANK POSITIONING The tank can be placed at will on a stable floor but not too far from the water heater s See 9 4 3 Intercon necting pipes equivalent length on page 50 NB This floor must be able to hold the weight of the water filled tank s ...

Страница 21: ...the flue gases can have a relatively low temperature the water heater needs to have a high efficiency approved stainless steel or plastic flue system These materials should be usable for the applied pressure in the flue gas system be condensate proof and have a temperature class of T 120 6 2 Air supply When an air supply duct is connected from the outside of the building to the water heater the wa...

Страница 22: ...ue gas mate rial for S WG appliances can be determined in a designation string according to the EN1443 see table CE string flue gas material B23P European standard Tem pera ture class Pres sure class Resis tance to conden sate Corrosion resistance class Metal liner specifi cations Soot fire resis tance class Distance to combus tible mate rial Plastics location Plastics fire beha viour Plastics enc...

Страница 23: ...laundry or chemical plants does expose combustion air to these contaminants 6 7 Flue gas air inlet calculation examples next pages For several flue gas air inlet combinations the maximum length of the pipes will be calculated using the given table A Twin pipe system with separate pipes for flue gas and air supply B Twin pipe system with separate pipes and concentric roof terminal C Single pipe for...

Страница 24: ...tube m 80 7 5 100 3 0 3 5 4 0 130 0 75 0 8 1 1 1 2 2 0 150 0 3 0 4 0 6 1 2 45 bend 80 3 5 100 1 5 1 7 2 130 0 4 0 4 0 5 0 6 1 0 150 0 15 0 2 0 3 0 6 90 bend 80 7 0 100 3 0 3 5 4 0 130 0 7 0 8 1 1 1 2 2 0 150 0 3 0 4 0 6 1 2 Air inlet zeta 1 0 80 18 1 100 7 4 11 4 16 7 130 2 6 4 0 5 8 9 1 13 1 150 2 3 3 3 5 1 7 4 CONCENTRIC PARTS RESISTANCE Pa Ø mm S WG80 S WG100 S WG120 S WG150 S WG180 roof termin...

Страница 25: ... 2m 2m 2m 5m Water heater type S WG 180 Flue gas Diameter 130 mm Number Pa Pa total Straight tube m total 9 6 54 Bend 90 2 6 12 Flue outlet conical 1 0 9 0 9 Total resistance flue gas outlet 66 9 Air supply Diameter 130 mm Number Pa Pa total Straight tube m total 8 2 16 Bend 90 2 2 4 Air inlet H D 1 0 1 13 1 13 1 Total resistance air supply 33 1 Total resistance flue gas outlet and air supply 100 ...

Страница 26: ...m 2m Water heater type S WG 120 Flue gas Diameter 100 mm Number Pa Pa total Straight tube m total 6 6 5 39 Bend 90 2 6 5 13 Roof terminal concentric 150 100 1 45 45 Adaptor conc par 150 100 1 22 22 Total resistance flue gas outlet 119 Air sup ply Diameter 100 mm Number Pa Pa total Straight tube m total 6 4 24 Bend 90 2 4 8 Total resistance air supply 32 Total resistance flue gas outlet and air sup...

Страница 27: ...The total resistance is less than 200 Pa This flue gas air supply system is functional 100 4m 2m 3m 2m 2m Water heater type S WG 100 Flue gas Diameter 100 mm Number Pa Pa total Straight tube m total 13 4 52 Bend 90 2 4 8 Bend 45 2 2 4 Flue outlet H D 1 0 1 15 2 15 2 Total resistance flue gas outlet 79 2 ...

Страница 28: ...00 100 130 130 Maximum pipe length inlet outlet together 18 0 31 5 24 0 44 5 30 0 Example B water heater type S WG80 S WG100 S WG120 S WG150 S WG180 Diameter air inlet 80 100 100 130 130 Diameter flue outlet 80 100 100 130 130 Concentric roof terminal 80 125 100 150 100 150 130 200 130 200 Maximum pipe length inlet outlet together 12 0 23 0 16 5 40 5 25 5 Concentric roof terminal Air inlet Flue ou...

Страница 29: ...ter heater type S WG80 S WG100 S WG120 S WG150 S WG180 Diameter air inlet 80 100 100 130 130 Diameter flue outlet 80 100 100 130 130 Diam roof terminal 80 100 100 130 130 Maximum pipe length total outlet length 21 5 46 5 27 5 49 5 30 0 Example C Vented area Air inlet Flue outlet ...

Страница 30: ...oose B C or E Concentric roof terminal 80 125 100 150 100 150 Maximum pipe length 7 0 14 5 10 0 Example E water heater type S WG80 S WG100 S WG120 S WG150 S WG180 Diameter concentric pipe 80 125 100 150 100 150 100 150 100 150 Concentric wall terminal 80 125 100 150 100 150 100 150 100 150 Maximum pipe length 12 5 20 0 15 0 8 5 6 5 Concentric roof terminal Concentric wall terminal Example D Exampl...

Страница 31: ... a skilled service engineer installer and according to all applicable standards and regulations 7 2 Electrical connections The following table describes the function of all connections of the water heater 1 2 DO NOT USE Do not connect any cable to these connections 3 4 TANK SENSOR This external flow sensor measures the flow temperature at the system side The sensor must be mounted on the supply pi...

Страница 32: ...hen the unit starts the burner and detects the flame this contact will be closed This contact can also be used to control an external extra water heater This contact can also be used for the switching of a pump with a separate control input connection PARAMETER A parameter change is needed 23 24 BURNER DEMAND OR PUMP ON OFF This contact is N O normally open When the unit receives any heat demand t...

Страница 33: ...E09 012 246 Manual S WG 34 7 4 Electrical schematics ...

Страница 34: ...E09 012 246 Manual S WG 35 ...

Страница 35: ...ater hardness within acceptable level 8 2 Frost protection The water heater has a built in frost protection that is automatically activating the pump when the water heater return water temperature drops below 5 C programmable When the water heater return temperature drops below 3 C programmable the burner is also ignited The pump and or burner will shut down as soon as the return temperature has r...

Страница 36: ...skipping the blocking procedures that apply at normal operation Again F16 display FlowReturn dt fault NB All values of this flow monitoring have been programmed by STREBEL in order to get the best performance combined with a long life time 8 5 Water pressure switch Water pressure getting too low indicates a blocking of the water flow If that is the case heat from the flue gases cannot be transferr...

Страница 37: ...ion is one water heater with one tank Shown in the picture are the principle components and connections Example of a combination of one water heater and one tank PUMP NON RETURN VALVE VALVE SAFETY VALVE AUTOMATIC AIR VENT FILTER INLET COMBINATION Overflow Controllable return valve Valve PRESSURE REGULATING VALVE Extra explanation 1 Pressure relief valve mandatory in case wa ter pressure is too hig...

Страница 38: ...water heater side should always be executed as drawn In the inlet return connection of the water heater no check valve is recommended All designs and tables in the next paragraphs go up to eight water heaters max If needed the water heater control can handle up to twelve water heaters B C B C 7 3 1 2 A A 5 6 6 6 6 6 6 6 6 Extra explanation 1 Pressure relief valve mandatory in case wa ter pressure ...

Страница 39: ...E09 012 246 Manual S WG 40 For large capacity installations more than two water heaters consult STREBEL ...

Страница 40: ...d flow monitoring ΔT function Parameters the default of the parameters of the water heater control have been set for this type of tanks 9 1 4 CASCADE CONTROL Up to twelve water heaters can be cascaded One water heater has to be appointed master the other water heaters are appointed slaves each with his own address in the software The slaves are connected with two wires to the master Every individu...

Страница 41: ... of the pump Connect the inlet of the pump to the upper of the two close above each other located connections of the tank labelled return to water heater Connect connection B of the water heater to the lower of the two close above each other located connec tions of the tank labelled flow from water heater Also make a tap point in this line at the lowest point WATER HEATER CONNECTIONS A inlet cold ...

Страница 42: ...tion to outlet of water heater CIRCULATION RETURN for recirculation of DHW from installation to tank Besides there are connections for Thermometer on side on of height of the tank Connection for T P valve mounted on top according to the applicable standards and regulations Even if a T P valve has to be applied the safety at the water heater s side on position C see previous page should be maintain...

Страница 43: ...funnel Any damage that might occur when the drain is not installed cor rectly is not covered by the warranty of the water heater There should be an open connection between the condensate hose and the sewage system to make sure that any pressure difference between the two can never affect the condense water level and hence the functioning of the water heater When mounting the bottom part of the sip...

Страница 44: ...han one water heater code F1 Ø 54 mm standard tube 54 1 5 The continuous hot water pipe that s connected to this water heater flow pipe is numbered after the corres ponding water heater F1 at water heater 1 F2 at water heater 2 etc Cold water in These pipes get codes R1 to RR where RR R last R for return The return connections directly to the water heaters get the next codes for an installation co...

Страница 45: ...ength see table Equivalent lengths in 9 4 3 on page 50 ELABORATED EXAMPLES At the end of this chapter in 9 5 4 three elaborated examples will be given demonstrating how to apply the tables and values given in 9 4 and 9 5 FF B1 A1 B1 A1 RR FF A1 B1 RR RR FF A1 B1 FF B1 A1 RR B1 A1 RR FF FF 1 2 3 4 5 6 7 B1 RR A1 FF A1 B1 8 RR FF COLD IN RR FF COLD WATER IN SERVICE PIPE SUMMARY ENCODING PIPES WATER ...

Страница 46: ...1 54 1 5 67 1 9 4 80 2 1 54 1 5 67 1 9 80 2 1 5 93 2 3 54 1 5 67 1 9 80 2 1 80 2 1 6 106 2 5 54 1 5 67 1 9 80 2 1 80 2 1 93 2 3 7 106 2 5 54 1 5 67 1 9 80 2 1 80 2 1 93 2 3 106 2 5 8 133 2 8 54 1 5 67 1 9 80 2 1 80 2 1 93 2 3 106 2 5 106 2 5 table WH 80 S WG100 Nr of cascaded water heaters FF RR F1 R1 F2 R2 F3 R3 F4 R4 F5 R5 F6 R6 F7 R7 1 54 1 5 2 67 1 9 54 1 5 3 80 2 1 54 1 5 67 1 9 4 93 2 3 54 1...

Страница 47: ...d water heaters 1 tank 2 tanks 3 tanks 4 tanks 5 tanks 6 tanks 7 tanks 8 tanks 1 42 1 4 35 1 3 28 1 2 22 1 1 22 1 1 22 1 1 22 1 1 22 1 1 2 67 1 9 42 1 4 35 1 3 35 1 3 28 1 2 28 1 2 28 1 2 22 1 1 3 80 2 1 54 1 5 42 1 4 42 1 4 35 1 3 35 1 3 28 1 2 28 1 2 4 80 2 1 67 1 9 54 1 5 42 1 4 42 1 4 35 1 3 35 1 3 35 1 3 5 93 2 3 67 1 9 54 1 5 54 1 5 42 1 4 42 1 4 35 1 3 35 1 3 6 106 2 5 80 2 1 67 1 9 54 1 5 ...

Страница 48: ...22 1 1 22 1 1 2 80 2 1 54 1 5 54 1 5 42 1 4 35 1 3 35 1 3 35 1 3 28 1 2 3 93 2 3 67 1 9 54 1 5 54 1 5 42 1 4 42 1 4 42 1 4 35 1 3 4 106 2 5 80 2 1 67 1 9 54 1 5 54 1 5 54 1 5 42 1 4 42 1 4 5 133 2 8 93 2 3 80 2 1 67 1 9 54 1 5 54 1 5 54 1 5 54 1 5 6 133 2 8 93 2 3 80 2 1 67 1 9 67 1 9 54 1 5 54 1 5 54 1 5 7 159 3 0 106 2 5 93 2 3 80 2 1 67 1 9 67 1 9 54 1 5 54 1 5 8 159 3 0 106 2 5 93 2 3 80 2 1 8...

Страница 49: ...ing to the total resistance and will therefore cause a necessary reduction of straight length The table contains a number of commonly used components and their equivalent length Copper pipe diameter Maximum straight length flow return equiv length 90 elbow R 0 5 D equiv length 90 elbow R 1 0 D equiv length 45 bend R 1 0 D fully ported ball valve RR FF m m elbow m elbow m bend m valve 54 1 5 24 2 2...

Страница 50: ... P1 P1 P1 P1 P1 2 P2 P1 P1 P1 P1 P1 P1 P1 3 x P1 P1 P1 P1 P1 P1 P1 4 x P2 P1 P1 P1 P1 P1 P1 5 x P2 P1 P1 P1 P1 P1 P1 6 x x P2 P1 P1 P1 P1 P1 7 x x P2 P1 P1 P1 P1 P1 8 x x P2 P2 P1 P1 P1 P1 P2 Grundfos UPS 32 100N P4 Wilo TOP Z 30 10 2 when not available P4 is replaced by P2 S WG100 Number of tanks Nr of cascaded water heaters 1 tank 2 tanks 3 tanks 4 tanks 5 tanks 6 tanks 7 tanks 8 tanks 1 P4 P4 P...

Страница 51: ...x x P3 1 NB An x in the pump tables doesn t necessarily mean that the corresponding installation cannot be built If it can it will need specific design effort and pump choice Please consult STREBEL for advice STREBEL part numbers Water heater Pump Part nr S WG 80 Pump Top Z 25 10 E09 000 064 S WG 100 Pump Top Z 30 10 E09 000 065 S WG 100 120 150 DHW pump UPS 32 100N E09 000 112 S WG 180 DHW pump U...

Страница 52: ...2 A S WG pump The nominal current of the pump must be equal to or lower than 2 A All pumps of 9 5 1 fulfil this condition Warning EC pumps In case of using an electronic commutating pump the relays 1 2 or 3 may not be used for the power connection because of the inrush current of the electronics of the pump Directly connect the pump to the mains of the water heater and use the cable kit from STREB...

Страница 53: ... than 12 m Use the table tank 450 L boiler S WG120 FF FF RR RR 1 RR FF KOUD IN 1 B1 A1 1 Assigning codes to a one water heater installation There s only one flow pipe encoded FF and one return pipe encoded RR For the right diameters see 9 4 1 pick the table of the corresponding water heater type 2 Assigning codes to cascades two or more water heaters to connect First number the water heaters water...

Страница 54: ...he picture must measure at least 54 1 5 mm mm column F1 R1 The pipes FF and RR must measure 67 1 9 mm mm column FF RR Tank connections From table T 100 2 nd row for 2 tanks A1 B1 54 1 5 mm mm is sufficient So for this system pipes sized at least 54 1 5 mm mm are to be applied for all connections directly on water heaters and tanks and pipes sized at least 67 1 9 mm mm for the flow and return conne...

Страница 55: ...ture return pipes starting at water heater last water heater 3 R1 R2 RR see picture Pipe sizes water heater side From table WH 180 3 rd row All pipes F1 and R1 in the picture must measure at least 54 1 5 mm mm column F1 R1 The pipes F2 and R2 must measure 93 2 3 mm mm column F2 R2 The pipes FF and RR must measure 106 2 5 mm mm column FF RR Tank connections From table T 180 3 rd row for 5 tanks A1 ...

Страница 56: ...caded water heaters and the tanks The pipes F2 and R2 must be at least 93 2 3 mm mm Equivalent length From table EL The maximum total length of flow and return pipes 106 2 5 mm mm is 36 7 m So when 106 2 5 mm mm is applied the physical distance between water heaters and tanks may be half of this so 18 m at max In case bends and or valves are used this distance becomes less than 18 m Use the table ...

Страница 57: ... ENTER button when pro gramming Connector for connecting computer cable Buttons can be pushed to open menu hold for 1 second Buttons to toggle through measured temperatures These are also used for navigating through the menus and used for changing values Button to activate service function hold for 3 seconds Schornsteinfeger function only for Germany Light will light up when controller sees good f...

Страница 58: ...duction Local set point water heater The temperature of the hot water supply from the DHW appli ance to the tank is set here press Display shows 2x20 digit mes sage for 3 seconds Message can be set in parame ters example Company name City Country PROGRAM menu In this menu one can set the DHW and Anti legionella program press OPERATING HISTORY menu Shows burning hours DHW etc Display shows for 3 se...

Страница 59: ...r is switched off only text in the display during this status N o d e m a n d No heat demand signal coming from the room themostat and calorifier sensor open S t a n d b y Room themostat calorifier sensor themostat detect heat demand but set point is reached P r e p u r g e The fan is purging before a burner start attempt P r e i g n i t i o n Ignition starts before opening of the gas valve I g n ...

Страница 60: ...value by the outdoor sensor T 6 F l u e 1 2 3 9 C Measured value by the flue gas sensor O p e n Shown when controller doesn t detect this sensor S h o r t e d Shown when sensor wires or sensor itself is shorted SCREEN 4 d T F l o w R e t u r n 1 2 3 9 C Temp difference between internal flow return d T F l u e R e t u r n 1 2 3 9 C Temp difference between flue gas internal return SCREEN 5 Temp diff...

Страница 61: ... to the cascade When the leading water heater is changed according to the set priority change time then that water heater s address will be shown first in the row of numbers Example 1 3 4 5 0 1 2 There are six water heaters present and nr 3 has priority Example 2 3 4 x 0 1 2 There are six water heaters present and nr 3 has priority Water heater 5 is present but in a lock out SCREEN 12 C a s c P o ...

Страница 62: ...ce mode 26 The burner is firing at 26 75 0 o C Max allowable water temp during service 60 0 o C Actual measured water temp when P5BJ active Press SERVICE to exit The unit will go to the operating screen Press 3 s ON OFF to exit The unit will be switched off By using the buttons the burner firing rate can be changed Press MENU to access the main menu Press MENU to return to the service menu Use but...

Страница 63: ...v i c e m o d e P o w e r 5 0 When the button is pressed briefly again the heater will fire at maximum firing rate In this state the display shows F l u e s e r v i c e m o d e P o w e r M a x i m u m When the button is pressed briefly again the heater will return to the normal operation mode The Schornsteinfeger function is switched off NOTES When the heater is burning during Schornsteinfeger fun...

Страница 64: ...3 4 C 1 2 3 4 C Program the water heater at the control panel see the following sections Terminate programming mode by pressing MENU or ENTER and NO or YES Reactivate the water heater by pressing ON OFF for three seconds again 10 8 Setting the time date The following graphs describe how to program the time and date of the unit Operating screen W A T R H T R S T A N D B Y 1 2 3 4 C 1 2 3 4 C Press ...

Страница 65: ...ive during the programmed DHW periods parameter P4 AA 1 2 DHW set point reduction parameter P4 AA 1 2 D H W R e d u c e 1 0 C The reduction of the normal day time set point This reduc tion is used outside the programmed CH periods DHW setpoint reduction parameter P4 AA 2 and P5 DJ DK 1 H e a t i n g s e t p o i n t 7 5 C This parameter is the local setpoint of the water heater and is regulated on ...

Страница 66: ...al DHW set point Outside the programmed period s the unit will use the reduced temperature as set point When no time is programmed for a period it will not be used Example no time programmed in period 3 on Monday Mon 3 Operating screen W A T R H T R S T A N D B Y 1 2 3 4 C 1 2 3 4 C Press MENU Select Timer using and press ENTER Main menu screen M a i n M e n u T i m e r Press ENTER Setting CH prog...

Страница 67: ...w seconds and return to base menu Press MENU to exit The water heater will reset and go to the operating screen Press for next SCREEN Copy programmed day for DHW C o p y f r o m D H W M o n C o p y t o D H W T u e Press to switch between Copy from and Copy to The blinking day is selected and can be changed Press to change the selected blinking value Press ENTER for confirmation screen when all set...

Страница 68: ...lues that can be set at the bottom line The blinking value can be changed Press to change the selected blinking value Press ENTER for confirmation screen when all settings are done Confirmation screen A r e y o u s u r e C a n c e l C o n f i r m Press to cancel the changes made unit will reset Press to confirm the changes The last alternation will be blinking for a few seconds and return to base ...

Страница 69: ...2 h r s C h T o t 1 0 0 0 0 0 0 h r s D h w T o t 1 0 0 0 0 0 0 Top line Total burning hours for heating Bottom line Total burning hours for domestic hot water SCREEN 3 h r s C h 5 0 1 0 0 0 0 0 0 h r s C h 5 0 1 0 0 0 0 0 0 Top line Burning hours for heating while the burner was firing less than 50 Bottom line Burning hours for heating while the burner was firing equal or higher than 50 SCREEN 4 ...

Страница 70: ...t 10 faults For each fault the display blinks between the two screens shown above The top line of the top screen shows the fault number and the bottom line of the top screen shows the date day and time the fault occurred On the top line of the bottom screen the fault type is dis played The bottom line shows the following SV The total amount of this fault that has occurred after the last time that ...

Страница 71: ...gnition cycles The text will blink once briefly after resetting Operating screen M a i n t e n M o d e Blinking second line What is blinking at the second line before a selection is made is the active maintenance option Press or to change the selected blinking option Screen Selecting of all maintenance options M a i n t e n M o d e A l l Press to set The option that is blinking can be changed usin...

Страница 72: ...f i r m Press to cancel the changes or to confirm the changes Hereafter the water heater returns to the op erating screen Screen Message after total amount of ignition cycles M a i n t e n M o d e I g n i t i o n c y c l e s Press to set The total amount of ignition cycles for the Maintenance message Press to Return to maintenance mode selection The blinking value can be changed with Press ENTER t...

Страница 73: ...isplayed M a i n t e n M o d e M a i n t e n O f f Press ENTER to confirm the changes Confirmation screen A r e y o u s u r e C a n c e l C o n f i r m Press to cancel the changes or to confirm the changes Hereafter the water heater returns to the op erating screen Note The MENU button will return the display to the operating screen BE AWARE This function is standard turned OFF We offer this progr...

Страница 74: ...ing screen H E A T I N G S T A N D B Y 1 2 3 4 C 1 2 3 4 C Press MENU Select User lock using and press ENTER User lock screen S e t U s e r l o c k 0 0 The 0 is now blinking selected and can be changed Use to change the value 0 User lock function OFF 1 User lock function ON Press ENTER for the confirmation screen after the selection has been made Confirmation screen A r e y o u s u r e C a n c e l...

Страница 75: ...es 8 P2KI CH interrupt by Legionella 0 yes 1 no L e g i o i n t r yes no yes yes 9 P2LC Regulation temperature offset DHWd C D H d s c O f f 2 yes yes yes yes A P2LE Proportional range DHWd modulation C D H d s c P r b 2 3 yes no yes yes B P2LD Regulation temperature hysteresis DHWd C D H d s c D i f 2 yes yes yes yes C P2LF integration time DHWd modulation s D H d s c I n t 2 3 yes no yes yes D P...

Страница 76: ... u l 1 Function to activate the step modulation 0 Off 1 On Menu A Heating A 2 H E s o f f 1 3 4 C CH supply temperature setting This parameter is the offset of the programmed CH temperature Menu A Heating A 3 H E s P r b 1 3 2 5 C Select the CH supply temperature control This parameter is the proportional range of the selected CH supply tempera ture Menu A Heating A 4 H E s c D i f 1 3 1 0 C Selec...

Страница 77: ...pply temperature of EACH boiler of the total cascade and of the external cascade sensor Menu A Heating A 9 T i m e r C o n t 0 Function to activate external time controller 0 Off 1 On Connect to 13 14 Contact closed daytime setting Contact open night time setting Menu B Hot water B 1 D H i p m p t w v 1 Hot water function of the boiler by 0 pump 1 3 way valve Menu B Hot water B 2 D H i f l o w L O...

Страница 78: ...er B 7 L e g i o h o l d 2 M i n Pasteurisation function of the boiler This parameter is the selected time period for the pasteurisation function of the boiler Menu B Hot water B 8 L e g i o i n t r 0 Pasteurisation function of the boiler This parameter controls if the CH demand can be interrupted by the pasteurisation function of the boiler 0 Yes 1 No Menu B Hot water B 9 D H d s c O f f 2 4 C Fu...

Страница 79: ...cascaded direct hot water boilers This parameter is the hysteresis of the selected HW temperature of the cascaded boilers Menu B Hot water B F D H i s c D i f 4 5 C Function for the indirect hot water supply of the boiler tank This parameter is the hysteresis of the selected HW temperature of the calorifier tank Menu B Hot water B G D H i d e t g r a d 3 C Function for the indirect hot water suppl...

Страница 80: ...r boiler Connect to the Master connections 21 22 Menu C Cascade C 5 C a s S i M a 0 Function for the cascading of the boiler s This parameter sets the function of the boiler at a cascade alignment 0 Single Slave unit 1 Master unit Menu C Cascade C 6 P w r O f f T o C a 0 Function for the cascading of the boiler s This parameter determines the function of the Slave boilers when the Master boiler is...

Страница 81: ...t 1 0 0 f 0 Function for setting the location height above sea level of the boiler NOTICE dimensions in English feet One unit 100 ft Use this function only in consultation with the supplier manu facturer Menu D General D 4 M a x C o o l T i m 2 M i n Function for setting the maximum overrun time of the fan Maximum 10 minutes 0 Switch off Menu D General D 5 T e m p O n D i s p 1 Function to show th...

Страница 82: ...General D 9 c o n f i g Function for setting the soft start option 0 normal start up 1 reduced fan ramp up speed I 2 reduced fan ramp up speed II Menu D General D A c o n f i g Function Pump mode 0 normal 1 relay 1 connector 19 and 20 lock out 2 relay 2 connector 21 and 22 burner burning 3 relay 3 connector 23 and 24 heat demand 4 relay CN10 connector 9 and 18 The screen texts on these pages are s...

Страница 83: ...p p u m p o n 9 9 9 5 h r s Reason Flow temperature exceeds the limit which has been set in the parameters Display message F1 R e t u r n h i g h T e m p p u m p o n 9 9 9 5 h r s Reason The maximum return temperature as set in the parameters is exceeded Display message F2 L a c k o f w a t e r p u m p o n 9 9 9 5 h r s Reason The general required gradient water lack has failed Display message F3 ...

Страница 84: ... n 9 9 9 5 h r s Reason Fault during programming of the water heater software parameters Display message F14 H i g h G a s F a i l p u m p o n 9 9 9 5 h r s Reason Gas supply pressure is too high Display message F15 C l i x o n F a u l t p u m p o n 9 9 9 5 h r s Reason Rear wall thermostat clixon detects a too high temperature Display message F16 F l o w R e t u r n d t f a u l t p u m p o n 9 9 ...

Страница 85: ...perature has exceeded the blocking temperature as set in the parame ters Display message R e t u r n t e m p h i g h 9 9 9 5 h r s Reason The return temperature has exceeded the blocking temperature as set in the parame ters but the return temperature has not exceeded the lock out value Display message T 1 T 2 h i g h 9 9 9 5 h r s Reason Temperature difference T1 T2 has exceeded the blocking valu...

Страница 86: ...the lock out value Display message C a s c a d e B l o c k 9 9 9 5 h r s Reason One of the cascaded water heaters causes an error because of a lock out Display message A P S f a u l t 9 9 9 5 h r s Reason The activation of the air pressure switch Display message N R V o r F a n f a u l t 9 9 9 5 h r s Reason Non return valve contact signal activated 15 seconds will cause a lock out Display message...

Страница 87: ...e backlight is blinking The water heater is operating but will count the exceeding hours A parameter must be changed after service to remove this message Display message N e e d s M a i n t e n a n 0 0 I g n i t i o n c y c l e s h r s Reason Maintenance option of total amount of ignition cycles has been reached Display message N e e d s M a i n t e n a n 0 0 D a t e h r s Reason Maintenance optio...

Страница 88: ...logue input Config 0 off 1 temp display D1 This parameter must be set at 1 so the supplied 0 10 V dc signal will control the temperature set point Possible settings are 0 0 10V control off 1 0 10V temperature set point control active See also the following graph for the relation between the temperature and the control signal offset Legionella hysteresis Legionella Legionella temp max setpoint min ...

Страница 89: ...s are used for this function Three of these parameters are shown in the following graph The settings of these parameters P5CI P5CJ and P5CD must be programmed according to all applicable anti Legionnaires disease preventing regulations The setting of these parameters can only be done by the manufacturer supplier of the water heater and is possi ble by the control panel of the unit without the use ...

Страница 90: ...P5BJ Temperature display 1 on display D5 The measured temperature in the operation display 0 not visible 1 visible 11 2 3 GAS TYPE SELECTION Settings for gas types natural gas propane or butane propane mixture B P P4 BD Gas type 0 standard 1 propane 2 butane propane B P display D8 This parameter is set 0 for the common used gas types such as natural gas G20 or G25 By setting this parameter 1 for p...

Страница 91: ...the mains the PWM connection is connected to CN10 contacts 9 and 18 Pumps with an on off control can be switched by one of the relay connections lock out burner burning or heat demand Choose a connection which is not yet used If all these connections are already used an external 24 V relay can be connected to the PMW output connec tion CN10 9 18 By setting the parameter 4 the PMW signal becomes a ...

Страница 92: ...ter NOTICE Check that the screw cap has been loosened at least one twist Make sure that during flushing and filling no water can reach any electrical parts of the water heater 12 3 Third check the water flow Before the water heater will be started be sure that the pump is functioning and that there is a water flow over the heat exchanger Check the electrical power supply of the water heater When t...

Страница 93: ...warning messages will be shown in the display Display message T 1 T 2 h i g h 9 9 9 5 h r s Reason Temperature difference T1 T2 has exceeded the blocking value as set in the pa rameters Display message D e l t a D i r e c t b l o c k 9 9 9 5 h r s Reason The temperature difference between flow and return has exceeded the blocking value When this temperature difference exceeds the lock out setting ...

Страница 94: ...1 2 3 4 C Reason Water heater is active but there is no heat demand The display describes The actual operation If a heat demand is activated The temperature setting The temperature measured When mounting the bottom part of the siphon before commissioning the water heater and or after maintenance the siphon must ALWAYS be completely filled with water This is a safety measure the water in the siphon...

Страница 95: ...s valve s and setting screws is given in 14 1 2 on the next page In 14 1 3 a general scheme conform which the adjustments must be carried out is presented in table form After that in 14 2 and 14 3 a thorough description is given of how to proceed in cases A and B respectively In 14 4 finally two main procedures used in the previous sections are described in detail 14 1 1 ADJUSTMENT TABLES Tables 2...

Страница 96: ... right settings when converting to a not mentioned type of gas Pressure adjustment settings LEFT valve water heater type p out pressure at gas valve nat gas G20 G25 propane G31 butane G30 S WG120 2 to 0 Pa 4 to 2 Pa 5 to 3 Pa S WG150 2 to 0 Pa 7 to 5 Pa 8 to 6 Pa S WG180 2 to 0 Pa 7 to 5 Pa 8 to 6 Pa The maximum fan speed has to be reduced to convert the water heater into a butane B P appliance Se...

Страница 97: ...8 80 100 150 180 120 P I L O T 9 I IN OUT AIR IN EV2 EV1 P I L O T 9 I IN OUT AIR IN EV2 EV1 P I L O T 9 I IN OUT AIR IN EV2 EV1 P I L O T 9 I IN OUT AIR IN EV2 EV1 P I L O T 9 I IN OUT AIR IN EV2 EV1 3 1 2 3 1 2 3 1 2 4 1 1 4 ...

Страница 98: ...g at maximum load procedure 1 set burner at maximum load measure CO2 at flue gas outlet use RIGHT screw 2 to match value with table 1 setting at minimum load continue only S WG120 150 180 set burner at minimum load use LEFT screw 1 to match p out with table 3 procedure 2 set burner at minimum load measure CO2 at flue gas outlet use RIGHT screw 1 to match value with table 1 repeat procedure 1 repea...

Страница 99: ...ntil you feel resistance This means that the valve is closed do not try to tighten the screw any further Now turn screw 2 counter clockwise open according to the number of turns in table 2 for the used wa ter heater and gas type After this adjust at maximum load by carrying out procedure 1 on p 102 If the burner doesn t start up in service mode turn screw 2 a quarter turn counter clockwise further...

Страница 100: ...e 3 use only the right hand screw 1 for setting the CO2 at low fire Adjust the right hand valve at minimum load by carrying out procedure 2 on p 102 Again toggle between high fire and low fire to make fine tuning adjustments adjusting the minimum setting af fects the maximum setting and contrariwise If the valves have been set correctly p out left should equal p out right As an additional test one...

Страница 101: ...g Decrease CO2 percentage Turn screw 2 right clockwise Increase CO2 percentage Turn screw 2 left counter clockwise The service operation of the water heater will be active for 40 minutes After this period the water heater will return to normal operation Procedure 2 adjust at minimum load In case B gas conversion or replacement of gas valve consult 14 3 before starting procedure 2 below Carry out t...

Страница 102: ...nd cascade if applicable are operational and so are both recirculation protection if applicable and frost protection To reactivate the water heater switch on the burner by pressing ON OFF for six seconds again The frost protection module can still activate the burner s To prevent this switch off this protection or put the water heater in power off mode next paragraph OUT OF OPERATION Power off To ...

Страница 103: ... component that generates the fault 16 1 Lock out codes Having a lockout means that the water heater needs a manual reset to start operating again When the water heater is in lockout the backlight of the display is blinking on and off Explanation 9 9 9 5 h r s time elapsed after fault message Explanation P u m p 1 o n status of the pump during fault Display message F0 F l o w s e n s o r e r r o r...

Страница 104: ...t there is no medium water present to transfer heat from combustion to the sensor The lack of water can cause this fault when the unit is firing Corrective action Make sure there is water present in the unit before firing Display message F3 R e t u r n s e n s o r e r r o r p u m p o n 9 9 9 5 h r s Reason Return sensor is not detected by the water heater PCB Cause Bad wiring connection in the ret...

Страница 105: ...ck for moist in the sensor connections or replace sensor Cause There is no water in the unit while firing Corrective action This is an unlikely situation while all the safeties for checking the water presence didn t detect anything Only a lot of air in the system unit under pressure can cause the water pressure switch to switch while no water is present Also the water leak detection did not react ...

Страница 106: ... the supply line are completely open Check if there is no air in the gas supply start up new systems Check if the gas valve opens When there is power supply to the gas valve but the valve does not open the gas valve must be replaced Check if the gas valve opens When there is no power supply to the gas valve check the gas valve wiring connections Check if the gas valve settings are correct and adju...

Страница 107: ...nisation signal Check the igniter ignition electrode and replace clean it if necessary Check the state of the ceramic insulator Check the distance between the electrode pin earth pin and burner Check the state of the ignition wire is also ionisation wire and replace if necessary Check the state of the igniter earth wire connection and replace it if necessary Check for proper electrical grounding o...

Страница 108: ... incorrect fan speed is detected Corrective action Check the 4 wired wiring and connections at the fan and at the main control board Check the 3 wired power supply wiring and connections at both ends Replace the fan Replace the main control board Display message F12 p r o g r a m m i n g e n d p u m p o n 9 9 9 5 h r s Reason Programming of the parameters completed successfully Cause Programming o...

Страница 109: ...s that might restrict the water flow through the unit Check for an external system pump that influences the flow through the unit Check if the system resistance exceeds the spare capacity of the unit pump Make sure the heat exchanger is clean Heat exchanger fouling partly blockage will increase the resistance causing the water flow to drop For F16 see also 8 4 Flow monitoring on page 37 Display me...

Страница 110: ...densate flow and clean the siphon if necessary Check the condensate drain hose between the siphon and the condensate drain point in the external installation Condensate must be able to flow freely Cause The condensate drain hose must have an open connection to the external system If not pressure fluctuations in the building drainage system can have effect on the pressure in the heat exchanger of t...

Страница 111: ...temperature has exceeded the blocking temperature but it has not exceeded the lock out value Cause Systems that pre heats the water heater return temperature too much high Corrective action Reduce pre heat temperature of external heat source Cause The need for heat in the system suddenly drops causing hot return water to the water heater Corrective action Dampen external heating system control to ...

Страница 112: ...Immediately opening and closing of the external thermostat Check switching differential of the ON OFF thermostat Controller settings need to be changed Be aware that the standard settings work fine for all common systems When anti cycling is active because of immediate heating or cool ing of the controlled water flow temperature it concerns an unconventional system Display message W a t e r p r e ...

Страница 113: ... Display message D e l t a D i r e c t b l o c k 9 9 9 5 h r s Reason Temperature difference between flow and return has exceeded the blocking value Cause The water flow through the unit is too low Corrective action Check functioning of the pump Check open all valves that might restrict the water flow through the unit Check for an external system pump that influences the flow through the unit Chec...

Страница 114: ... The circuit connected to the general blocking terminals is not closed Corrective action Check all external components that are connected to the general blocking terminals and check why the contact is not closing during heat demand Cause If used in combination with flow switch The water flow through the unit is too low Corrective action Check functioning of the pump and the flow switch Check open ...

Страница 115: ... reached Display message N e e d s M a i n t e n a n 0 0 D a t e h r s Reason Maintenance option of the date has been reached Display message N e e d s M a i n t e n a n 0 0 B u r n i n g h o u r s h r s Reason Maintenance option of total amount of burning hours has been reached Display message N e e d s M a i n t e n a n 0 0 A l l h r s Reason One of the abovementioned maintenance options has bee...

Страница 116: ...every twelve months Display message N e e d s M a i n t e n a n 0 0 I g n i t i o n c y c l e s h r s Reason Maintenance option of total amount of ignition cycles has been reached Display message N e e d s M a i n t e n a n 0 0 D a t e h r s Reason Maintenance option of the date has been reached Display message N e e d s M a i n t e n a n 0 0 B u r n i n g h o u r s h r s Reason Maintenance option...

Страница 117: ...nce and service proceedings in relation to the water heater parts Flue gas air supply The flue gas pipes and the air supply pipes must be checked for gas tightness Also check if the mounting of these pipes is correct safe and not damaged Check the rooftop of the water heater housing for signs of water leakage and traces of water coming from the air supply pipe the air vent or any condensate coming...

Страница 118: ...the blades or else the fan might be out of balance and run irregularly causing noises and fan failures Check the fan also for any water damages In doubt always replace the fan of the water heater Insulation The insulation of the heat exchanger located on the rear wall inside the heat exchanger and burner door must be inspected If this insulation disk shows any signs of water damage or degradation ...

Страница 119: ...talla tion Also the owner end user should be advised how to fix these defects and these defects should be reported in the service report log file of the water heater During service and maintenance the gas supply air flue gas and condensate connections are discon nected checked and replaced Make sure that all these components are mounted correctly before commissioning the water heater again Mountin...

Страница 120: ...he user should be made familiar with all safety precautions of the water heater and the installa tion The user should be instructed that service and maintenance of the water heater is required every twelve months Regular service and maintenance is essential for a safe and proper operation of the water heater Hand over the documents that are supplied with the water heater ...

Страница 121: ...f ignition 34 118 inspection maintenance 118 installation of the S WG 38 ff Legonnaires disease 90 maintenance 117 master 41 max cooling time 91 monitor screens 61 night shift 66 overpressure safety valve 8 ff 42 ff password 59 76 plant room 20 positioning the water heater 20 power supply 20 32 pressure relief valve 6 42 pressure safety valve 20 printed circuit board 34 pump 3 32 36 ff 38 ff 51 pu...

Страница 122: ...E09 012 246 Manual S WG 123 notes ...

Страница 123: ...E09 012 246 Manual S WG 124 notes ...

Страница 124: ......

Страница 125: ...ley Surrey GU16 7PB Tel 01276 685422 Fax 01276 685405 Email info strebel co uk Web www strebel co uk Further information on our complete product range is available from our website CAST IRON CONDENSING STEEL SHELL WATER HEATERS RENEWABLES FLUES ACCESSORIES RADIATORS ...

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