Strebel S-WG+35/150 User manual

STREBEL
S-WG
Floor standing high efficiency water heating systems
Installation, Operating & Maintenance Manual
BASE VERSION
E93.0902EN013
Models:
•S-WG+35/150
•S-WG+35/230
•S-WG+55/230

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Table of contents
INTRODUCTION…………………………………………………………………………….……..………..….....5
1SAFETY GUIDELINES .............................................................................................................................. 5
1.1 GENERAL........................................................................................................................................... 5
1.2 IMPORTANT TECHNICAL WARNINGS AND GUIDELINES ............................................................................ 6
2TECHNICAL DATA S-WG WATER HEATER SYSTEMS ........................................................................ 8
2.1 TABLE GENERAL TECHNICAL SPECIFICATIONS....................................................................................... 8
2.2 SYSTEM EFFICIENCY........................................................................................................................... 9
2.3 PERFORMANCE .................................................................................................................................. 9
2.4 DIMENSIONS S-WG+35/150 ............................................................................................................ 10
2.5 DIMENSIONS S-WG+35/230 AND S-WG+55/230 ............................................................................. 11
3ACCESSORIES AND UNPACKING........................................................................................................ 12
3.1 SUPPLIED ........................................................................................................................................ 12
3.2 UNPACKING ..................................................................................................................................... 12
4INSTALLATION OF THE S-WG+ APPLIANCE...................................................................................... 13
4.1 GENERAL NOTES.............................................................................................................................. 13

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INTRODUCTION
This manual has been written for:
the installer
system design engineer
the service engineer
the user
abbreviations NB
ATTENTION!
symbols
Warning: important information related to the safety
of persons and/or the appliance
terminology
Flow
Return
Water heater hot water out
Water heater cold water in
The SW-G system consists of a boiler, tank, pipes and pump. Use also the
“S-WG Wall hung” manual when installing and servicing the “S-WG system”
1 SAFETY GUIDELINES
1.1 General
Read all these instructions before commencing installation.
Keep these instructions together with the user manual near the water heater for quick reference.
The appliance should be installed by a skilled installer according to the applicable standards and regulations.
Failure to comply with these regulations could lead to the warranty becoming invalid.
Without written approval of the manufacturer the internals of the water heater may not be changed. When
these changes are executed without approval, the water heater certification is invalid.
Commissioning, maintenance and repair must be done by a skilled installer/engineer, according to all applic-
able 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)
Warn the installer immediately
The manufacturer/supplier is not liable for any damage caused by inaccurately following of these
mounting instructions. Only original parts may be used when carrying out any repair or service works.
This appliance is not intended for use by persons (including children) with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a person responsible for their safety. Children should
be supervised to ensure that they do not play with the appliance.

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1.2 Important technical warnings and guidelines
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 (see also “S-WG Wall hung” manual)
A first necessary condition is the quality of the water to be heated in the water heater. Three values matter:
hardness, total amount of dissolved solids and acidity. If water quality does NOT meet the requirements
the system may be seriously damaged in time.
♦Hardness should not exceed 205 PPM CaCO3(11.5°dH)
♦TDS (Total Dissolved Solids) may 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 at your local water supplier.
If water quality doesn’t meet the abovementioned requirements, a water treatment installation should be
installed to improve water quality to the required levels, if possible.
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 S-WG appliances the next instructions and recommendations apply:
!Only use stainless steel or PP flue gas outlet
(Never use aluminum or aluminum 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
maintenance and/or installation changes
!Never change the parameters P4AD, P4AAand P5BI
!Never place a 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

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Warnings and guidelines (continuation)
STREBEL is not liable for any damage caused by inaccurately following these mounting instructions.
Only STREBEL parts may be used when carrying out any repair or service works.
Do not use chlorine based products for brazing.
When commissioning the water heater, the running of the pump must be checked before leaving the installa-
tion.
By pressing the service button during a couple of seconds the water heater can be fired independently from
the thermostat circuit. Firing the water heater without water flow (but filled with water) will cause a boiling noise.
The flow and return temperature are checked continuously. The temperature difference may not exceed the
programmed value belonging to the actual power level. If it does, the water heater will go in a lock-out.
Minimum water pressure 1 bar, maximum operating pressure 8 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/m3and an annual average of 30 mg/m3 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 containing these contents.
BE AWARE: By first installation, the built-in manually-operated air vent should be open. This air-vent is located
at the top of the heat exchanger of the “S-WG heater”. This vent must be opened during the filling of the water
heater and the DHW system to make sure that no air/oxygen is trapped in the heat exchanger of the water
heater.
Make sure that, during flushing, filling and venting, no water can reach any electrical parts of the water heater.
LEGIONNAIRES’ DISEASE
An anti-Legionella function is present in the software but is default turned OFF.
(See also “S-WG Wall hung” manual).
GAS CONVERSION
If a non-standard gas type is to be used for this water heater, fan speed must be reduced by altering
parameter P4BD. (See also “S-WG Wall hung” manual).

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2 TECHNICAL DATA S-WG WATER HEATER SYSTEMS
Important: The water heater system is an assembly of the water heater (S-WG 35 or S-WG 55), pump
(Grundfos UPXML GEO 25-125-N-180), tank (EWD150 or EWD230) piping and other parts.
For detailed specifications of the water heater see “S-WG water heater” manual.
2.1 Table general technical specifications
GENERAL
Type of water heater
S-WG+35/150
S-WG+35/230
S-WG+55/230
Dimensions (h x w x d) mm 1525x610x1000 1565x610x1000 1565x610x1000
Water content est. Litres 150 230 230
Weight dry kg 97 114 117
In- and outlet water connection union inch R 1½ʺ R 1½ʺ R 1½ʺ
Gas connection inch R ¾ʺ R ¾ʺ R ¾ʺ
Flue/air concentric mm 80/125 80/125 80/125
Flue/air twin pipe mm 80/80 80/80 80/80
For other specifications see “S-WG Wall hung” manual.
DOMESTIC HOT WATER Values min-max:
Nominal input (Net) kW 10.1 – 33.7 10.1 – 33.7 14.0 – 52.9
Nominal input (gross) (G20 G25 G31)
kW
11.2 – 37.4 11.2 – 37.4 15.6 – 58.8
Nom. output 80/60°C kW 9.6 - 32.1 9.6 - 32.1 13.4 - 50.5
Nom. output 50/30°C kW 10.4 – 34.7 10.4 – 34.7 14.2 – 53.7
Nom. output 37/30°C kW 10.8 – 36.3 10.8 – 36.3 15.1 – 57.1
INSTALLATION
Max. water temperature °C 75
Pressure WW-system min-max bar 1.0 – 8.0
Relief valve pressure max bar 10
ELECTRICAL DATA
Power consumption W 160 160 195
Power supply V / Hz 230 / 50
Protection class IPX4D

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2.2 System efficiency.
The efficiency of the complete installation depends on:
·type of water tank. · volume of the water tank.
·type of circulation pump. · length of the connecting pipes.
·insulation of the connecting pipes.
2.3 Performance
The amount of hot water which can be tapped, is related to:
♦The temperature of the stored water in the tank
♦The size of the tank
♦The capacity of the water heater
♦The temperature at the tap.
Example: Set temperature tank: 75°C, cold water 10°C
Temperature at the tap: 38°C (for a bath or shower) – for kitchen use 60°C is available.
Combination S-WG 35 and 230-litre tank
Result:
1. Continuous tapping: up to 16 L/min (hot water 38°C; cold water 10°C)
2. Amount of water in L/min, before the tank temperature is lower than 38°C: by 25 L/min: 27 minutes.
To make calculation easier, hereby some information:
L/min of 38°C
S-WG 35 with 150 L. tank
S-WG 35 with 230 L. tank
S-WG 55 with 230 L. tank
10
continuous
continuous
continuous
15
continuous
continuous
continuous
20
93.2 minutes
143 minutes
continuous
25
27.4 minutes
42 minutes
continuous
30
16.1 minutes
24.6 minutes
161.4 minutes
35
11.4 minutes
17.4 minutes
43.5 minutes
40
8.8 minutes
13.5 minutes
25.2 minutes
45
7.2 minutes
11 minutes
17.7 minutes
50
6.1 minutes
9.3 minutes
13.6 minutes
Type of Water Tank:
EWD150
EWD230
Energy label
C
C
Standing loss (S)
W
61.3
78.8
Storage volume (V)
l.
153
240

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2.4 Dimensions S-WG+35/150

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2.5 Dimensions S-WG+35/230 and S-WG+55/230

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3 ACCESSORIES AND UNPACKING
3.1 Supplied
The S-WG+ system DHW appliance is supplied as a complete system:
•Modulating water heater including control for the complete hot water system
•Tank of stainless steel
•Stainless steel pump
•All the pipes in stainless steel
•Complete wiring
•Drain valve at the bottom of the tank
•Siphon drain hose
3.2 Unpacking
The S-WG+ DHW system comes with the following documents and accessories:
•One “S-WG+ systems” Installation, operating and maintenance manual.
•One “S-WG Wall hung” Installation, operating and maintenance manual.
•Attached to the gas valve:
Two spare fuses, three spare nuts for mounting the burner plate and a gas conversion sticker
After delivery, immediately check the water heater package to see if it is complete and without any defects.
Report any imperfections immediately to your supplier.

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4 INSTALLATION OF THE S-WG+ APPLIANCE
4.1 General notes
The installation area/room must have the following provisions:
•230 V - 50 Hz power source socket with earth connection.
•Open connection to the sewer system for draining condense water
•Gas connection
Note:
The floor must be able to hold the weight of the water filled appliance.
Other considerations related to the water heater location:
•The ventilation of the plant room must meet all applicable standards and regulations, regardless of the
selected supply 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
water heater location should minimize any disturbance this might cause.
•There must be sufficient lighting available in the plant room to work safely on the water heater.
•Notice the positioning of electrical components in relation to the temperature sensitivity.
•Make sure there is an open connection with the sewer to drain the condensate.
This connection should be lower than the condensate drain level of the water heater.
The water heater must be positioned and installed by a qualified installer in accordance with all applicable
standards and regulations. Commissioning the water heater must be done by a skilled service / commissioning
engineer.
Use the “S-WG Wall hung” manual for further assistance.

Strebel Ltd
1f Albany Park Industrial Estate,
Frimley Road, Camberley,
Surrey, GU16 7PB.
T01276 685422
F01276 685405
E[email protected]
Iwww.strebel.co.uk
Further information on our complete product range is available from our website.
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