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INSTALLATION OPERATION AND MAINTENANCE MANUAL COMBIfl o Indirect High Effi ciency Boiler & Stainless Steel Storage Water Heater 100/300, 150/300 M7889...
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Technical Parameters COMBIflo COMBIflo Model 100/300 150/300 Space heating parameters Condensing boiler Low-temperature boiler(1) B1 boiler Cogeneration space heater Combination boiler Rate heat output rated Useful heat output at rated heat output and high 91.5 136.8 temperature regime(2) Useful heat output at 30% of rated heat output and low 29.9 43.9 temperature regime(1)
1.1 DESCRIPTION OF APPLIANCE This Andrews COMBIfl o is a gas fi red, low No×, multi- heat engine cascading boiler system, with an integrated 5” Low Loss Header for the supply of a low temperature hot water space heating system. The COMBIfl...
Indicates serious danger from electricity to personal safety and life CAUTION! Indicates a potentially dangerous situation for the boiler and the environment INFORMATION Suggestions to assist the user in implementing instructions in this guide ADDITIONAL READING Reference to additional information in other documents ANDREWS COMBIfl o...
This heater is designed to be used in a domestic hot water supply and storage system. Any other use of this heater will be considered improper. Andrews Water Heat- ers declines any responsibility for any damage or injuries caused by an improper use. In order to use the heater according to its designed scope, it is essential to carefully follow the instructions given in this guide.
IGE/UP/16 - Design for Natural Gas installations on industrial and commercial premises with respect to hazardous area classifi cation and preparation of risk assessments CAUTION These manufacturer’s notes must not be taken in any way as over-riding statutory obligations. ANDREWS COMBIfl o...
- Low Voltage (LVD) Directive 2014/35/EU - Boiler Effi ciency (BED) Directive 92/42/EEC This manual is an integral and indispensable part of the appliance and it is suggested that this manual is kept in a safe place for future reference. ANDREWS COMBIfl o...
SPLIT UNIT WEIGHT & DIMENSIONS LH HEATER SECTION RH TANK SECTION 100 Weight = 175 kg 150 Weight = 205 kg 100 Weight = 85 kg 150 Weight = 85 kg 1090mm(L) x 655mm(W) x 1950mm(H) 600mm(L) x 600mm(W) x 1950mm(H) ANDREWS COMBIfl o...
2. Drill marked position on fl oor to allow installers preferred method of fi xing. 3. Refi t plate and fasten through using preferred fi xing method. 4. Repeat method for the other three corner fi xing points. Slide plate onto corner support ANDREWS COMBIfl o...
This will result in Chlo- ride concentration and premature boiler failure if left untreated. If Chloride concentration levels have exceeded 200mg/l, the system should be fl ushed clean and refi lled with low Chloride water and appropriate system treatments. ANDREWS COMBIfl o...
Water treatment is usually recom- base exchange water mended when the hardness levels measures greater than 150 ppm. For this reason, treatment is strongly recommended in hard water areas. ANDREWS COMBIfl o...
The distance from the normal water level to the top of the cistern should comply with that specifi ed by the Water Authorities. 4.6.1 DE-STRATIFICATION PUMP By virtue of its design, an internal DHW tank de-stratifi cation pump is not required. ANDREWS COMBIfl o...
Part G of Schedule 1 of the Building Regulations. Water Temperature & Pressure Relief Valve Expansion Vessel Wall Bracket Assembly Cold Water Inlet of Water Hose Assembly Check Valve Pressure Reducing Expansion Valve Valve/Strainer Tundish Cold Water Feed Balanced Cold Water Take-off (if required) ANDREWS COMBIfl o...
It is important that the condensate fl ow must be maintained, even in freezing conditions. In the event that the condensate becomes blocked, the appliance will shutdown completely, and will not operate again until the fl ow has been restored. ANDREWS COMBIfl o...
Once heater is fi rmly screwed into boss, fi ll the tank with water and check for leaks at maximum operational pressure. Install electrical supply to immersion heater according to the manufacturers instructions, ensuring that the heater is wired with heat resisting or mineral insulated cables complying with BS6207. ANDREWS COMBIfl o...
QX22 (Y2) to close the valve until the temperature fall was detected by sensor B1. Precise temperature control is maintained by alternating 230V via QX21 & QX22 until the desired temperature is maintained, at which point no voltage maintains the valve position. ANDREWS COMBIfl o...
CAUTION The installer is responsible for ensuring that the right type of fl ue system is used and that the diameter and length are correct. Only the accessories supplied by Andrews will ensure that the correct system components are used.
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If the air change rate is less than 0.5 changes per hour the following minimum free vent area will be as follows:- Model Position of vent <50% Summer use >50% and <75 Summer usage >75% summer usage COMBifl o 100 High & low level 188cm 282cm 375cm COMBIfl o 150 High & low level 280cm 420cm 560cm ANDREWS COMBIfl o...
Above a pitched roof From a roof structure 2,500 2,500 2,500 2,500 Above a fl at roof From any other roof fl ue terminal 1,730 2,170 1,110 +Not Recommended - Risk assessment required ++ Plume management recommended ANDREWS COMBIfl o...
When the combustion fl ue system required is longer than 5m, it is recommended that a separate system to capture excess condensation formed inside the fl ue is fi tted. ANDREWS COMBIfl o...
Check for gas tightness (BS. 6891) in pipework to the appliance by connecting a manometer to the inlet pres- sure tapping point.(See Fig. 4.1) Gas and combustion soundness within the appliance should be checked using sense of smell and leak detection fl uid. Ensure gas tightness before moving onto commissioning. ANDREWS COMBIfl o...
Burner On - When any of the appliances heat engines are in operation, an internal relay will activate and close the circuit to indicate that at least one heat engine is in operation. ANDREWS COMBIfl o...
5. Solar DHW Q5 (pump) B6 (Collector B31 (DHW sensor) tank sensor) 6. Primary controller Y19 (open Y20 (close Q14 (pump) B15 (fl ow sen- mixer valve) mixer valve) sor) * Can be freely confi gured ANDREWS COMBIfl o...
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The operation of the primary pump with each heating circuit and DHW will need to be determined by setting parameters 872, 1172, 1472 or 1880. * Please see separate ‘CONTROLS PROGRAMMING GUIDE’ guide supplied with heater for further details on how to confi gure these modes ANDREWS COMBIfl o...
• Function “Energy indicator” to monitor data points for energy-related limit values, or “Green limits” and send to 2 email recipients. • Periodically (daily, weekly or monthly) send system reports to a maximum of 4 e-mail recipients. ANDREWS COMBIfl o...
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4.18.1 CONNECTING WEB SERVER OZW672 TO THE APPLIANCE Paying careful consideration to the manufacturers instructions which accompany the OZW672, the following wiring op- tions are recommended: For commissioning and operation of the OZW672 please refer to the Siemens guide accompany- ing the device. ANDREWS COMBIfl o...
(about 1.5 metres above the fl oor) See illustration on the following page for guidance on sensor positioning ANDREWS COMBIfl o...
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Up to a maximum of three room units can be connected to the same set of QAA connections inside the COMBIfl o wiring centre. The base provides the power for QAA55. When the room units are removed from the base, power is cut off (i.e. the units are out of operation). ANDREWS COMBIfl o...
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- Operation changeover heating circuit. - Readjustment of comfort setpoint. - Changeover of operating level (occupancy button) A setpoint readjustment with the knob is adopted either by pressing the operating mode button or with- out any further confi rmation (time-out). ANDREWS COMBIfl o...
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AGU2.5), the setup of the manual thermostat, for the control of a heating zone is as follows: Line Display Notes 6046/6054/6062 Defi ne function input H2 Setup as “Room thermostat HC1, HC2 or HC3” 6047/6055/6063 Defi ne contact type H2 Normally open or normally closed ANDREWS COMBIfl o...
The heat engines and Low Loss Header (LLH) must be completely full of water and devoid of all trapped air. Failure to remove air from the heat exchangers can result in permanent damage and failure of the appliance. Fill / drain point Pressure relief valve ANDREWS COMBIfl o...
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CAUTION It is ESSENTIAL that all air is removed from the heater before proceeding with commissioning the heat engines , otherwise permanent damage may occur to the heat exchangers and this damage is not covered by warrantee. ANDREWS COMBIfl o...
As this appliance contains several heat engines, the manufacturer recommends that commissioning is carried out using Siemens OCI700 service tool or the Andrews commissioning tool, available directly from the manufacturer. If neither of these tools are available to the commissioning agent, then the following manual procedure can be used:- 5.2.2 HEAT ENGINE ONE (TOP MOST UNIT) COMMISSIONING...
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If you are experiencing CO readings that exceed 250ppm after 30 minutes of burner operation, please fi rst check that your gas analyser is functioning correctly and then contact Andrews Water Heaters on the customer support number given on the rear cover of this manual, for advice.
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If you are experiencing CO readings that exceed 250ppm after 30 minutes of burner operation, please fi rst check that your gas analyser is functioning correctly and then contact Andrews Water Heaters on the customer support number given on the rear cover of this manual, for advice.
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If you are experiencing CO readings that exceed 250ppm after 30 minutes of burner operation, please fi rst check that your gas analyser is functioning correctly and then contact Andrews Water Heaters on the customer support number given on the rear cover of this manual, for advice.
10. Allow one minute between adjustments, and do not move the adjuster more than 1/8 turn at any one time. 11. Replace the cover over the throttle screw, when adjustment is complete. 12. Affi x the new LPG serial number data label supplied with the heater over the top of the existing NG data plate. ANDREWS COMBIfl o...
30 seconds each. This will occur even if the appliance is in standby mode. This function is automatic and is designed to help prevent pumps from sticking if the appliance has not been in opera- tion for some time. ANDREWS COMBIfl o...
5.6.2.1 FAULT DISPLAY EXAMPLES The display will show a if the appliance has recorded a fault. More information can be obtained by selecting the info pages menu . See example screen: Fault symbol Info pages ANDREWS COMBIfl o...
Gas valve connections Fan connectors Gas valve fl ange bolts Air snorkel Air control valve Gas valve vacuum tube Spark electrode Ionisation electrode Door nuts (x4) ANDREWS COMBIfl o...
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fi ve minutes before scrubbing with a nylon brush and fi nally rinsing away all deposits with clean water, until the condense pipe runs clear. • At the end of the cleaning process unscrew the condense trap bowl, clean out and refi t. • Assembly is the reverse. ANDREWS COMBIfl o...
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Disconnect any pipework connections to allow removal of the Tank Inspection Hatch at the top of the unit on RH side. Remove foam insulation to reveal Tank Inspection Hatch. Loosen nut on Tank Inspection Hatch to remove Hatch and inspect storage tank. ANDREWS COMBIfl o...
The LLH sensor is fi tted into the top of the LLH in the rear top left hand side of the appliance. • Undo the securing screw and withdraw sensor from pocket. • Unplug connector from loom. • Cut off securing tie and remove sensor. • Replacement is the reverse ANDREWS COMBIfl o...
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Unplug the cable from the rear of the GUI • Use a small fl at edged screwdriver release the GUI from its opening, by compressing the four plastic edge clips and gently pulling display out the front of the opening • Replacement is reverse ANDREWS COMBIfl o...
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• Carefully pull off the mains connections (pull back locking tab) and ignition cable from the spark genera- tor. • Release the screws holding the spark generator to the bracket (do not fully remove), and remove. • Replacement is the reverse. ANDREWS COMBIfl o...
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• Drain as much of the primary and secondary systems water as possible, to reduce water spillage. • Release all four heat exchanger connections and slide the heat exchanger toward the rear, and remove sideways • Replacement is the reverse. ANDREWS COMBIfl o...
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• Remove the vacuum air tube from the gas valve. • Using a pair of pliers, compress the Hose clip and pull hose off venturi. • Pull other end slowly off the air intake manifold. • Replacement is the reverse. ANDREWS COMBIfl o...
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• After fi ve minutes check the rate and combustion is correct to the table on page 8. Adjust using tle screw on the gas valve clockwise to decrease CO , anti-clockwise to increase CO if required. (see 5.2.1 for details) ANDREWS COMBIfl o...
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• Disconnect the gas valve from the venturi by removing the three securing screws Heat exchanger door screws • Remove the whole burner system using the four retaining nuts holding the heat exchanger door to the body. ANDREWS COMBIfl o...
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Isolator valve • Unscrew by hand the sensor • Replacement is the reverse NOTE: It is important not to over-tighten the water pressure sensor during fi tting. The maximum permissible tightening torque is 2Nm (approximate to hand tight). ANDREWS COMBIfl o...
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• Transfer the supply lead to the new pump. • When replacing the electrical connector, ensure the screw lines up with the receiver and then apply gentle pressure to the connector whilst tightening the screw. • Refi ll and check for leaks. ANDREWS COMBIfl o...
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• Undo the unions at the top and bottom of the pump body and remove pump (have a receptacle ready to catch any escaping water). • Replacement is the reverse. Fit the new pump seals suppied with the replacement pump. • Refi ll and check for leaks. ANDREWS COMBIfl o...
Maintenance message Item requiring attention but not preventing heater operation (e.g. 12 Month service due). Check details of message on the heater Front GUI screen. ANDREWS COMBIfl o...
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Check CO levels at min and max output. Safety time exceeded Ignition unsuccessful after 5 attempts within a 24 hour period. Check ignition and gas circuits for possible faults. ANDREWS COMBIfl o...
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Increase water pressure by adding water to system, as necessary Input BX, same sensors BX sensor duplicated - check parameters Input BX/extension module, BX extension module sensor duplicated - check parameters same sensors Extension module, same function Any Extension Modules duplicated - check parameters ANDREWS COMBIfl o...
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When the ing mode (No fault displayed) heater is operating via the volt free enable signal, it is not possible to operate the heater manually via the GUI if the signal is not enabled (circuit closed). ANDREWS COMBIfl o...
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