Ensbury pressure jet boiler

Product information

Advanced return distribution within boiler allows operation with return temperatures as low as 15°C. (Minimum flow temperatures apply).
Operating efficiencies of up to 95% nett (86% gross) at part load.
Suitable for use on open vented or sealed low temperature hot water heating systems .
Robust three-pass heat exchanger design helps to achieve European Class 5 performance for NOx emissions.
Suitable for use with liquid biofuel as a renewable energy choice. Natural Gas, LPG (propane) or oil are other fuel options.
Extensive back up and support from our team of experienced engineers across the UK.
Long term commitment to spare parts.

New build projects.
Housing developments and flats using district heating networks.
Large commercial and public buildings including schools, hospitals, offices and hotels.
Medium sized commercial and public buildings including schools, hospitals, offices and hotels.
Rural locations without access to mains gas supply.
Locations with substantial and continuous heating loads including hospitals, care homes and hotels.
To see where our Ensbury boilers have been used, visit our case studies page.

Can be installed with the Arne flue gas economiser to increase operating efficiency by up to 18%.
Choose from a wide range of service contracts to help maintain optimum performance.
Book commissioning at the same time as placing your order for improved warranty terms.
Flues available

Energy

	Units	ELT440	ELT510	ELT580
Building regulations Part L seasonal efficiency	% gross	85.05	85.11	84.97
Boiler output 80/60°C	kW	440	510	580
Boiler input (gross) - maximum	kW	537	622	707
Boiler input (nett) - maximum	kW	483	560	637
Boiler output - minimum 80/60°C, NG	kW	100	100	165
Boiler output - minimum 80/60°C, oil	kW	127	127	219

Water

	Units	ELT440	ELT510	ELT580
Water content	litres	540	540	540
System design flow rate @ 20°C ∆T rise	l/s	5.26	6.1	6.94
Water side pressure loss @ 20°C ∆T rise	mbar	20	27	35
System design flow rate @ 10°C ∆T rise	l/s	10.53	12.2	13.88
Water side pressure loss @ 10°C ∆T rise	mbar	81	108	140
Water flow rate - minimum	l/s	No min flow rate	No min flow rate	No min flow rate
Minimum water pressure	barg	0.5	0.5	0.5
Maximum water pressure	barg	4	4	4
Maximum water flow temperature	°C	90	90	90
Minimum water flow temperature - NG	°C	60	60	60
Minimum water flow temperature - oil	°C	50	50	50
Minimum water return temperature	°C	15	15	15

	Units	ELT440	ELT510	ELT580
Gas flow rate, NG - maximum	m3/hr	51.2	59.3	67.4
Inlet pressure for NG - nominal	mbar	20	20	20
Inlet pressure for NG - maximum	mbar	50	50	50
Input rate for oil (35sec)	l/h	50.8	58.8	66.9

	Units	ELT440	ELT510	ELT580
Approx. flue gas volume @ 15°C, 9% CO2, N.T.P	m3/hr	614.9	707.1	830.1
Flue gas temperature @ 80/60°C	°C	182	192	197
Combustion chamber resistance	mbar	2.53	3.83	5.86

Connection

	Units	ELT440	ELT510	ELT580
Water flow/return connections		PN6 - DN80	PN6 - DN80	PN6 - DN80
Gas inlet connection pipe thread size		Rc1 ½"	Rc2"	Rc2"
Safety valve connection		Rc1 ½"	Rc1 ½"	Rc1 ½"
Drain connection		R1"	R1"	R1"
Flue diameter (O/D) - nominal	mm	250	250	250

Connection

	Units	ELT440	ELT510	ELT580
Water flow/return connections		PN6 - DN80	PN6 - DN80	PN6 - DN80
Gas inlet connection pipe thread size		Rc1 ½"	Rc2"	Rc2"
Safety valve connection		Rc1 ½"	Rc1 ½"	Rc1 ½"
Drain connection		R1"	R1"	R1"
Flue diameter (O/D) - nominal	mm	250	250	250

Electrics

	Units	ELT440	ELT510	ELT580
Electrical supply for boiler		230V 1Ph 50Hz	230V 1Ph 50Hz	230V 1Ph 50Hz
Electrical supply for burner		230V 1Ph 50Hz*	230V 1Ph 50Hz*	230V 1Ph 50Hz*
Approx shipping weight (excluding burner)	kg	973	976	980