Table of Contents
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Table of Contents
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Summary of Contents for Strebel S-HQ
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Page 2: Explanations Of Symbols And Signs On The Control Tower Display
Explanations of symbols and signs on the Control Tower display. Operation indication (in the first display position by technical read out) No heat requirement Ventilation phase Ignition phase Burner active on central heating Burner active on hot water Fan check Burner off when room thermostat is demanding Pump overrun phase for central heating Pump overrun phase for hot water... -
Page 3: Table Of Contents
Content Declaration of conformity ......................3 Introduction ..........................4 Regulations ..........................4 Scope of the supply ........................6 Description of the boiler ....................... 6 Mounting the boiler ........................6 Dimensions ........................7 Connecting the boiler ........................9 Central heating system ..................... 9 Expansion vessel ...................... -
Page 4: Declaration Of Conformity
The current, Electricity at Work Regulation must be complied with and also be in accordance with the relevant and current editions of the British Standards. The STREBEL S-HQ boiler is a certified appliance and must not be modified or installed in any way contrary to this Installation Manual. - Page 5 The STREBEL S-HQ is a central heating unit with an optional integrated hot water function. These units must be connected according to these instructions and all installation norms in respect of the part of the unit to be connected. Observe the following rules of safety: All work on the unit must take place in a dry environment.
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Page 6: Scope Of The Supply
Fixing material consisting of plugs and screws; Description of the boiler Room sealed boiler The STREBEL S-HQ boiler is a room sealed, condensing and modulating central heating The boiler retreives its boiler, with or without an integrated hot water facility. combustion air from... -
Page 7: Mounting The Boiler
Mounting the boiler The room where the boiler will be placed must always be frost free. It is NOT necessary to have a purpose provided air vent in the room or internal space in which the boiler is installed. Neither is it necessary to ventilate a cupboard or compartment in which the boiler is installed, due to the extremely low surface temperature of the boiler casing during operation. -
Page 10: Connecting The Boiler
A low velocity header must be connected to the Q51C, Q51S and Q60S to prevent flow problems over the boiler. STREBEL supplies the AA1OV09U Low velocity header for 1 boiler. This can be connected directly under the boiler on the flow and return pipe. -
Page 12: Expansion Vessel
Expansion vessel The central heating system must be provided with an expansion vessel. The expansion vessel which is used should be geared to the water content of the installation. The pre- charge pressure depends on the installation height above the mounted expansion vessel. See table 4. -
Page 13: Expansion Vessel Module
By this means the external expansion vessel is not required. This expansion vessel module is placed behind the STREBEL S-HQ boiler, by which means the expansion vessel is not noticeable. The content of the two expansion vessels is 20 litres. -
Page 14: Underfloor Heating System (Plastic Pipes)
Make sure that the gas pipe work does not contain dirt, particularly with new pipes. When the boiler has to be converted from natural gas to LPG, STREBEL provides special kits for this purpose. Special instructions are supplied with the kit. -
Page 15: Condensation Drain Pipe
Condensation drain pipe STREBEL boilers produce condensate. This condensate must be drained otherwise the boiler will not function. The collecting condensation drain pipe should be connected to the drain by means of an open connection. By this means the possibility of drain gases ending up in the boiler is prevented. -
Page 16: Flue Gas Exhaust System And Air Supply System
6.7 Flue gas exhaust system and air supply system The flue gas exhaust system and air supply system consists of: Flue gas pipe; Air supply pipe; Roof or wall terminal. The flue gas exhaust system and air supply system must comply with: The flue gas outlet and air supply installation must comply with the current regulation requirements. - Page 17 Monopass Flue systems. The STREBEL flue gas system is meant and designed solely the use on STREBEL central heating boilers adjusted for Nat gas or LPG. The maximum flue gas temperatures are below 70°C (full load 80/60°C)
- Page 18 In certain weather conditions condensation may also accumulate on the outside of the air inlet pipe. Such conditions must be considered and where necessary insulation of the inlet pipe may be required. In cold and/or humid weather water vapour may condense on leaving the flue terminal. The effect of such ‘plumeing’...
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Page 19: Dimensions Of The Flue Gas And Air Intake Duct
40 – ( 2 x 1.1 ) = 37.8 meters. Pipes with 60/100 diameter are only permitted on wall terminals in combination with STREBEL boilers untill 25kW. Two pipe flue system + chimney lining in m in m ø80mm... -
Page 20: External Hot Water Cylinders
External hot water cylinders Depending of the comfort preferences different external hot water cylinders can be connected to the boiler. The choice of the cylinder depends on the coil output. The coil output must comply with the boiler output. A cylinder which is used in combination with aQ 51S of Q 60S, should have a minimal capacity of 40 kW respectively 45kW (minimal ø28mm coil). -
Page 21: Electrical Connection
All connections should be designed in accordance with the enclosed regulations.; Should it be necessary to change it, the mains power supply cable may only be replaced with an STREBEL mains power supply cable (item No. S4407300). The STREBEL room thermostat and controls must be connected to their allocated connections. -
Page 23: Boiler Controls
Boiler controls The boiler is provided with a fully automatic microprocessor control, called CMS Control Management System. This control simplifies operation by undertaking all major control functions. Initially when power to the unit is switched on it will remain on standby. -
Page 24: Explanation Of The Function Keys
Explanation of the function keys Central Heating programme key. Switching the Central Heating on or off (Led on/off); Hot Water programme key. Switching the Domestig Hot Water (DHW) facility on or off (Led on/off); PC programme key. adjusts the pump to continuous water circulation in the central heating system (Led on), or according to the pump overrun times on the relevant programs (Led off);... -
Page 25: Filling And Venting The Boiler And Installation
10 Filling and venting the boiler and installation The central heating installation needs to be filled with potable water. For filling or topping up the installation you use the filling loop according to the following procedure: 1 Switch on the power supply; 2 The diplay will show FILL;... -
Page 26: Commissioning The Boiler
11 Commissioning the boiler Before the boiler is fired, ensure that the boiler and the system are well vented and free of air. Purge the gas line between the gas meter and the boiler and carry out a gas soundness test as specified in the current Gas Safety Regulations. The boiler does not require adjustment of the burner pressure and air quantity because it is self adjusting and is factory set at the correct value. -
Page 27: Adjustments
Lower flow temperature More boilers in Cascade, i.e.. Read through the Parameter chapter to adjust the boiler to its installation. Contact STREBEL Ltd. in case of doubt. Please follow next procudere to alter adjustments: Altering adjustments Press the Mode-key for 5 secondss. -
Page 30: Isolating The Boiler
Isolating the boiler In some situations it may be that the entire boiler must be switched off. By switching off the three keys with the lamps for central heating, hot water and pump programme ), the boiler is switched off. Leave the plug in the wall socket, which means the circulation pump and the three-way valve are activated once every 24 hours in order to prevent jamming. -
Page 31: Checking Of The Zero Pressure Control
Turn the upper measuring nipple on the gas valve open (fig. 12); Connect the hose of the digital pressure gauge to the upper measuring nipple of the gas valve Press the + key until the maximum value is achieved; The fan will function to its maximum revolutions (burner stays off) Measure the under pressure and write down this value. -
Page 32: Checking The Co
13.3 Checking the CO The CO percentage is factory-set. This has to be checked at commissioning, maintance and faults. This can be checked by means of the following procedure: Remove the black cover of the gas valve by unscrewing the sealed screw. Put the boiler into operation and take care that it can deliver its heat;... -
Page 33: Maintenance
14 Maintenance Maintenance or changes to the unit may only be carried out by an authorised technician. 14.1 The frequency of maintenance We advise to carry out an inspection/overhaul to the boiler every year, but at least after two years and an overhaul every four years, depending from the running hours mentiond in the warranty conditions. -
Page 34: Maintenance Activities
Ignition electrode The replacement of the electrode is only necessary when the electrode is worn off. This can be checked by measuring the ionisation current. The minimum ionisation current has to be higher the 4µA on full load. If the viewing glass is damaged the complete electrode must be replaced. Replacement goes as follows: remove the electrical connections of the electrode;... -
Page 35: Technical Specifications
S T R E B E L S H Q... -
Page 36: Parts Of The Boiler
16 Parts of the boiler 13 14 Strebel Q-boiler figure 15 1 heat exchanger 8 ceramic burner cassette 15 safety group DHW 2 ignition unit 9 cylinder DHW (Combi) 16 expansion vessel 3 fan unit 10 operating panel 17 thermostatic mixing valve... -
Page 37: Installation Examples
17 Installation examples 17.1 Radiator installation without thermostatic radiator valves installation example figure 16 A Boiler: Connection terminal Strebel Q-boiler BrainQ thermostat Outside sensor ARV12 Thermostatic radiator valve By-pass Use alway a by pass in combination with thermostatic radiator valves. -
Page 38: Radiator Installation With Underfloor Heating Zone
17.2 Radiator installation with underfloor heating zone installation example figure 17 A Boiler: Connection terminal Strebel Q-boiler Outside sensor ARV12 MadQ zone controller 23BC Connection terminal MadQ built in B Cylinder: Cylinder sensor Three-way valve cylinder C Direct zone: Pump direct zone... -
Page 39: Error Indication
18 Error indication A detected error is indicated on the display by means of blocking or error messages. A distinction should be made between these two messages due to the fact that blocking can be of a temporary nature, however, error messages are fixed lockings. The control will try its utmost to prevent locking and will temporarily switch off the unit by blocking it. - Page 43 STREBEL LTD. • Albany park industrial estate • Frimley road, Camberley • Surrey GU15 Telephone: (01276) 685422 • Fax: (01276) 685405 • E-mail: info@strebel.co.uk • Internet: www.strebel.co.uk E. & O. E.
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