Hot Water Boilers

Thermal and Pressure Engineering range of boilers employ a well tried and proven design concept based on the reverse flame combustion technology pioneered in hot water boilers by Thermal and Pressure Engineering. This reverse flame combustion method provides an economical and highly efficient three pass gas flow system. The design incorporates a large pressurized combustion chamber allowing the first two passes of gas to be made in the combustion chamber itself. The scrubbing action of the reversing flame causes the gases to enter and re-enter the high temperature flame zone many times before making the third and final pass through the smoke tubes. Dimples in the smoke tubes further slow the passage of the combustion gases providing additional efficient heat transfer.

A major criteria in this design is the careful balance between radiant heating surfaces and secondary convection heating surfaces to ensure optimum efficiency when firing either gas or oil.

Because of the use of a pressurized combustion system the boiler operation is completely independent of chimney draught. Chimney sizes are therefore reduced with consequent installation savings.

An extremely easy to clean design as all heating surfaces can be reached easily by opening the burner door. This boiler can be cleaned while hot and still in service completely eliminating the need to shut down the system. An important feature of continued efficient operation, as each millimetre of soot or fouling reduces efficiency by 7%.

Wet back construction with insulated firing door for maximum heat retention to reduce the possibility of condensation in the combustion chamber.

A completely demountable casing system which is easily mounted on the framework forming a permanent part of the boiler.

The boiler top casing is strengthened and braced. The top section is constructed of heavy chequer plate and can serve as a walkway overcoming the most common on site damage problem.

Features:

Output Range
100kW to 3000kW - higher outputs on request

Working Pressure
500kPa

Test pressure
750kPa

Insulation
Boiler Shell: 75mm fibreglass insulation with aluminium foil totally encasing boiler shell
Boiler Door: Ceramic Fibre

Casing
1.5mm steel panels finished in blue enamel
4mm chequer plate top

Door Hinging
Door hinged - handling optional

Burner/Fuel
Pressure jet burner to suit required fuel system
Natural Gas/LPG/Oil/Duel Fuel

Electrical Wiring
415 volt 3 phrase 50 cycle standard
Except models HWB100 - HWB300: 230volt 1 phrase 50 cycle

Valves
Drain valve fitted
Safety valve sized for application (optional extra)

Control Panel
Standard modular control panel mounted on side of heater

Standard Features Optional Features
ON/OFF Switch Digital Return
Digital Flow Temperature Indication
Temperature Indication Flue Gas Temperature Indication
Control and High Limit – (<HWB500) Modulating Control
Thermostats Low Water
High/Low Thermostat – (<HWB500) Cut Out and Indication
Indication Lights High or Low Gas
Power On Pressure Indication
High Limit Time Clock
Lock Out  
High Fire  
Low Fire  

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Technical Data

Model Output Dimensions (mm)
HWB kW A B C D E F G H J
HWB100 100 770 1780 905 400 680 720 120 75 475
HWB125 125 770 1780 905 400 680 720 120 75 475
HWB150 150 770 1780 905 400 680 720 120 75 475
HWB175 175 770 1780 905 400 680 720 120 75 475
HWB200 200 930 1850 1065 400 750 870 120 85 555
HWB250 250 930 1850 1065 400 750 870 120 85 555
HWB300 300 930 1850 1065 400 750 870 120 85 555
HWB350 350 930 1850 1065 400 750 870 120 85 555
HWB400 400 930 1850 1065 400 750 870 120 85 555
HWB500 500 1040 2082 1175 400 982 955 140 95 610
HWB600 600 1040 2082 1175 400 982 955 140 95 610
HWB800 800 1200 2172 1350 500 922 1105 140 105 705
HWB1000 1000 1240 2386 1390 500 1136 1120 140 105 725
HWB1200 1200 1350 2386 1500 500 1136 1205 175 125 780
HWB1500 1500 1485 2490 1640 500 1240 1320 175 125 860
HWB1800 1800 1660 2800 1800 500 1650 1360 175 125 940
HWB2100 2100 1850 3280 2000 500 2000 1550 175 175 1045
HWB2500 2500 1850 3550 2000 500 2294 1550 175 175 1045
HWB3000 3000 2150 4000 2300 500 2750 1900 175 175 1200
Model Connections (mm) Dry Weight Water Content Fuel Consumption
HWB Flow & Return Safety Vent Flue OD kg litres GAS mj/hr OIL l/hr
HWB100 65 20 150 445 330 430 12
HWB125 65 20 150 465 322 537 14
HWB150 65 20 180 485 316 645 18
HWB175 65 20 180 504 312 753 20
HWB200 65 25 200 650 450 860 25
HWB250 65 32 200 680 440 1075 28
HWB300 80 32 200 765 420 1290 35
HWB350 80 32 200 780 410 1505 41
HWB400 80 32 20 790 400 1670 46
HWB500 100 40 250 1000 500 2150 58
HWB600 100 40 250 1260 630 2580 70
HWB800 125 50 300 1500 725 3225 87
HWB1000 125 50 350 1796 912 4085 113
HWB1200 125 2x40 400 2054 1170 5160 143
HWB1500 150 2x40 450 2952 1570 6450 179
HWB1800 150 2x50 450 3400 1890 7740 215
HWB2100 150 2x50 500 4200 2200 9030 250
HWB2500 200 2x65 600 4450 2630 10750 299
HWB3000 200 2x65 600 5780 3150 12900 350

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