Page 1: ...SYSTEMS MANUAL for CORVEC DOMESTIC BOILERS chaffoteaux et llhury AA...
Page 2: ...a flexible and responsive appliance having efficiencies of 78 80 Since a boiler providing central heating is designed to maintain room temperatures at an adequate level when the outside temperature is...
Page 3: ...ntrol that provides all the necessary interlock features required by current Standards With the consumer s control in the off position A no gas can reach the pilot or main burner i res ive of the oper...
Page 4: ...VENTURI FROM HEAT EXCHANGER THERMOELECTRIC VALVE GAS WATER SECTION TO BURNER t FLOW TO SYSTEM DIAGRAMATIC ONLY NOT TO SCALE...
Page 5: ...curate and could result in user dissatisfaction and in the final analysis there is no substitute for proper heat loss calcula tion This has the added advantage of highlighting the areas of greatest he...
Page 6: ...will flow through each square metre for each degree C each square foot for each degree F difference between the internal and ex ternai temperatures in the case of external walls or in the case of par...
Page 7: ...lated wood floor on ioists air brick on one side bare boards parquet lino or rubber Air brick on more than one side bare boards parquet lino or rubber Solid floors in contact with earth 0 61 0 11 0 59...
Page 8: ...50 0 26 I Internal walls 3 breeze plastered both sides 2 25 Window single glazed wood frame 4 30 0 79 Ceiling wood floor above ceiling plastered 1 70 0 30 I I I Floor solid I 0 36 I 0 06 I Exposure N...
Page 9: ...x41 0 27 Wall E 12 x 8 5 102 ft2 Nil Wall S 14 x 8 5 119 ft2 5 15 0 40 238 O 9 0 79 758 168 it2 1 40 32 0 06 403 16Rft2 I lfl 34 0 30 wM Glass 6 x 4 24 ft2 1 4 Floor 14 x 12 Ceiling 14 x 12 t I V T A...
Page 10: ...tion should be closer than 2 in above and should not protrude more than half the width of the radiator If it does an additional 10 should be added to the output to allow for this Ensure there is no ob...
Page 11: ...p as the circuit progresses The last radiators on the loop will receive cooler water than the first and therefore the mean water tem perature will be lower so it will be necessary to in crease the rad...
Page 12: ...given to the inclusion of protective saddles to prevent damage by nails Pipe fixings and supports should be fitted at intervals not exceeding 1 8 m 6 ft in exposed or vulnerable positions the interva...
Page 13: ...Velocity in excess of 3 m secretary Velocity in excess of 1 m secretary Size...
Page 14: ...ONE PIPE SYSTEM 5000 btulh A one pipe system has load of 17 000 btu h Temperature difference is 36 F System has 80 of 15 mm pipe Heat emission from 15 mm pipe assuming 90 F above room temperature is...
Page 15: ...5 mm pipe 0 22 in w g per ft Length of pipe 30 ft Equivalent length of fittings 4 elbows 8ft 2 L valves 2ft c alent length of pipe I section 40 ft Resistance in section 40 x 0 22 in 8 8 in w g Section...
Page 16: ...6 ins SMALL EORE PIPES MICROBORE PIPES Chaffoteaux boilers are suitable for use with micro housing The pipework can be laid in the screed bore systems The essential feature of a microbore with proper...
Page 17: ...run in inches Flow Rate WG 62 F lb h Pipe size 6mm o d 8mm o d IlOmm o d 50 0 86 0 20 I n 05 60 1 10 0 24 0 06 70 1 38 0 29 0 08 m an 171 0 10 90 2 08 0 41 012 100 2 51 0 47 0 14 110 2 98 0 55 1 Of16...
Page 18: ...of the pump Most pump manufacturers require a minimum of 6 ft static head at the pump inlet PUMP PERFORMANCE AT 240V 82 C 1 180 F Q 7 F E t t LITRES SEC 0 5 1 0 _ 1 6 I GPM 8 I I I 12 16r i g _ 1 2 g...
Page 19: ...H l Ii 7 mwr I FIG 10 1 PRESSURE AT BOILER OUTL ET 1 j I I I I _ _ I 1 _ I I p y 801 LER OUTLET FIG 11 FIG 12 FIG 13...
Page 20: ...of a pipe then it is unlikely that the air will be vented See Fig 18 The open vent pipe MUST rise throughout its entire length from its junction with the system to atmosphere over the expansion tank...
Page 21: ...6 7 _ MAXIMUM DISTANCE 150 mm 6 ins r FIG 15 22 mm OPEN VENT 15 mm COLD FEED 28 mm T EQUAL WITH ALL BRANCHES REDUCED TO 22mm 7 LOW VELOCITY POINT FORMED IN STRAIGHTL PIPE COLD FEED AND OPEN VENT CONNE...
Page 22: ...feed and expansion tank performs two functions It allows the system to fill and automatically replenishes water lost through evaporation and minor undetectable leaks It also accepts the expansion of t...
Page 23: ...equate to support the static head to the top of the boiler plus whatever is the minimum static head required by the manufacturer at the boiler In this connec tion we recommend that the static head plu...
Page 24: ...55 12 10 88 18 96 41 20 15 60 33 04 I I 150 33 0 1o uo 16 80 31 04 175 38 5 11 68 19 60 36 24 200 44 0 13 36 22 40 41 44 I 3 0 I I 1 0 1 5 I 2 0 j 1 0 1 1 5 1 2 0 l 5 jjo I 1 I 1 10 96 2 16 3 76 8 24...
Page 25: ...necessary to fit a safety valve adjusted to the final system pressure plus 4 psi The safety valve should discharge outside the building into a drain or safe place All high points should be vented in...
Page 26: ...rcuit A lockshield valve should be used in the circuit to balance the flow It is becoming increasingly popular to pump cylinders contraflow i e with the flow zentering the bottom of the cylinder and t...
Page 27: ...heaters and also the first purpose made gas shower heater the singlepoint heaters are flueless or open flued the multipoints and shower heaters are balanced flue With the exception of the shower heat...
Page 28: ...d to direct sun light An alternative control is achieved by the use of thermostatic radiator valves most of these are directional so care should be exercised in siting them The valve is stamped with a...
Page 29: ...PUMP 1LjNj Chaffoteaux recommend that the hot water thermos t valve is a 3 Port valve with built in by pass N I FIG 29 d FIG 30 7 I DOMESTIC HOTWATER CENTRAL HEATING I 1 MECHANICAL CONTROL OVER HOT W...
Page 30: ...x y _ 5 _ MOTORISED VALVES WITH SPRING RETURN WITH AUX SWITCH I PROGRAMMER MV MOTORISED VALVES DRIVE OPEN PROGRAMMER DRIVE CLOSED t 1 FIG 34 FIG 35 BIV AAV HOT WATER PRIORITY PROGRAMMER _ _ PUMP t J...
Page 31: ...IG 39 FROSTTHERMOSTAT AUDIO VISUAL ALARM ANCILLARY FIG 40 LOW WATER LEVEL LOW PRESSURE HIGH TEMPERATURE OR SIMILAR CONTROL pipework to the cylinder cupboard are run in 22 mm pipework Cylinder cupboard...
Page 32: ...tion and ventilation is brought irt fror roof level The air intake duct is installed flush with he inside face of the duct The flue duct from appliance is cut to length usuaily extending I in beyond t...
Page 33: ...ft I SPLITTER NOTTO EXTEND MOIRE THAN DEPTH OF TERMINAL 3 If 300mm 1 ft BEU SOFFIT 600mm 2 ft ON ElTHt EXTENDING TO INCLUDE PLASTIC GUT 2 IF LESS THAN 1 800 mm 6ft ABOVE GROUND LEVEL FITTERMINAL GUARD...
Page 34: ...diverter If an extractor fan is fitted first carry out test on flue with the fan off If this is satisfactory open door to room in which appliance is fitted connect ing to room in which fan is fitted a...
Page 35: ...can add 5 flexibility the boiler providing thezheated water can also provide hot water or additional radiators 6 lower risk of corrosion because the boiler heat exchanger the water to air heat exchang...
Page 36: ...rate should not exceed High side wall 300 fpm ft per minute Registers are placed at high level on inside walls Carf 3s to be taken with the choic of grille so that no discomfort is caused to the occu...
Page 37: ...a gauge at the inlet to the appliance when running and all other gas appliances in the property in operation At the inlet to the appliance under the conditions as above the pressure should not be less...
Page 38: ...3 6 130 61 200 0 11 4 0 0 80 28 1 65 59 3 4 120 OUTSIDE DIAMETER OF COPPER TUBING i 27 t 90 1 0 041 1 3 1 1 7 1 0 291 10 1 1 6 8 1 61 t 200 1 0 02 1 0 9 1 1 1 1 0 191 6 7 1 4 5 0 26 1 9 3 Il 01 135 6...
Page 39: ...oach within it The whole of the area within a distance of 3 m from tanks up to 2250 litres water capacity or 10 n r from larger tanks should be maintained at ALL times free from weeds long grass or co...
Page 40: ...nloading point 1 above ground n None 1 3 10 1 3 10 1 None Il 5 5 3 10 3 10 3 10 I l 3 5 5 3 10 I 7 5 25 Whether built on or not Where tanks up to 450 litres water capacity are sited adjacent to mobile...
Page 41: ...ing around y cylinder s Short cycling around by pass Heat loss incorrect Radiator too small Radiator obstructed Too large a temperature difference Room thermostat Cylinder not high recovery Mechanical...
Page 42: ...Restricted register Obstruction in duct L CAUSE REMEDY I Replace Clean surface of cylinder and re locate using heat grease Check cylinder and air vent as recommendations in Section 4 2 _d Vent high p...
Page 43: ...82 ft 24 m 80 ft 19 Kg 42 Ibs 6 9 Kg 15 25 Ibs 10 7 Kg 23 5 Its 1 Hetght 205 mm 8 ins Flueless or 125 mm 4 9 ins Wrdth 305 mm 12 ins 3 ins0 240 mm 3 4 ins From Internal From External Htgh Low High Lo...
Page 44: ...it 0 04 aals I 0 58 lit 1 02 ots I 0 58 lit 1 02 ots I Flue size Height 1 125mm 4 9ins 1 4in8 lOOmm0 1 205mm 8ins 1 4in0 lOOmm8 1 205mm eins Width 1 240mm 9 4 ins 1 4 305 mm 12 ins 305mm 12 ins High c...
Page 45: ...SOLID FUEL Sunbright E 7 495 kwhlka L 5 Internal temperatues of 21 C 7O F 18 C 65 F and 16 C 60 F see Table 1 6 Domestic hot water allowed on a percentage basis _ Estimated consumptions allow for app...
Page 46: ...Petroleum Gas Systems in which connections to radiators are made in 6 mm 8 mm or 10 mm tube usually from a central manifold Open Vent Also called the safety vent pipe or expansion pipe AT pipe of not...
Page 47: ...hour to millilitre second ml s gallon hour to litre hour I h gallon hour to millilitre second ml s gallon minute to cubic metre hour h3 g gallon minute to litre second PRESSU RE 0 028 28 32 7 866 4 5...
Page 48: ...23 gallons 62 35 ibs 1 Btu wiil raise 1 lb water 1o F in 1 hour 1 K cal will raise 1 Kg 1 litre water 1 C in 1 hour 1 m3 water 1000 Kg 1000 litres OC to F 1 8C 32 F to C s 9 F 32 1 bar lOmofhead 15ps...
