Boiler Operación y Mantenimiento: Calidad del Agua y Sistema de Gases Residuales, Apuntes de Mecánica de suelos

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Industrial Boilers

System solutions for hot water and

steam applications

1

Industrial boilers Table of contents

Page

Hot water boilers

Steam boilers

• ■ Description THW-I NTE
  • Sectional view
• ■ Technical data
  • Flue gas diagram
  • Flue gas temperature and boiler efficiency
• ■ Dimensions
  • Space requirements
• ■ Engineering
  • Boiler water specifications
• ■ Description aqua3 E
  • Sectional view
• ■ Technical data
  • Flue gas diagram
  • Flue gas temperature and boiler efficiency
• ■ Dimensions
  • Space requirements
• ■ Engineering
  • Boiler water specifications
• ■ Description THD-U
• ■ Technical data
• ■ Dimensions
• ■ Engineering
  • Boiler and feed water specifications for steam boiler plants
• ■ Description THSD-I E
• ■ Technical data
• ■ Dimensions
  • Space requirements
• ■ Engineering
  • Boiler and feed water specifications for steam boiler plants

THW-I NTE

Industrial hot water boiler for oil and gas firing

Description

THW-I NTE

Hoval hot water boiler

The Hoval high output hot water boilers are made of quality steel and are distinguished by their solid, robust and elastic construction. They particularly convince by their easy way of operation, their easy maintenance and optimal efficiency. The client receives an economical, environment friendly compact unit, ready for installation. The boilers are constructed for oil or gas firing.

Boiler type THW-I NTE The type THW-I NTE classical 3 pass flame tube wet back boiler with an inner fully water cooled flue gas turning chamber guarantees high efficiency. The boiler consists of a cylindric shell, the two head plates, the centric flame tube including the back flue gas turning cham-ber with water cooled finned tube wall and the two flue gas passes. The boiler door is thermally insulated and flue gas proof for burner mount-ing. The boiler is completely electrically welded and provided with all required inspection openings. The spacious designed flame tube with low thermal charges results in an excellent combustion and reduces emissions. The large water con- tent secures an even boiler running time and thus reduces the number of boiler starts.

Admissible max. safety valve pressure/temperature

Standard pressures: 6 and 10 bar. Higher pressure on request. Max. operating temperature: 110/120 °C (depending on local regula- tions).

Thermal insulation

The boiler is fully insulated including flue gas collector with rock wool insulation. The casing is made of structured aluminium plate. Sockets and cuttings are nicely framed.

Connection fittings and sockets

The connection fittings and sockets on the boiler and on the fitting pipe are meant for the attachment of: flow intermediate piece, thermometer for return, return shut-off, safety valve, drain, vent.

Large equipment

2 boiler supports 1 flue gas collector with integrated flue gas exit backward. 1 back cleaning cover with bleeder valves 1 boiler door for burner mounting, thermally insulated and designed flue gas proof, placed on left and right swivelable hinges for the flue gas sided cleaning of boiler 1 boiler plate

High efficiency

Due to the above technical facts an efficiency of up to 95 % (standard efficiency 75/ 60 °C flow/ return) can be achieved. Thus continuous working costs are kept low. The sources of energy are used more efficiently and Hoval spares the environment.

Construction guiding, quality approval

The boiler is designed with all necessary inspection doors. The construction and manufacturing of the boilers is done according to the European Pressure Equipment Directive (PED) 2014/68/EU, with CE-Certification; boilers up to 10 MW and 10 bar according to EN

14394. The ISO 9001:2000 certification and the quality approval at our factory with our Hoval quality performance department guarantees the highest product quality. For installation and operation of the boiler the local laws and norms are to be respected.

Control panel

The control panel for the Hoval boiler can be equipped with the required control units and indicators for control and supervision of boiler and burner. The operation and alarm reports may be shown as fault indication. The control panel will be made upon customer requirements and depending on the burner to be used.

Boiler water quality

For operation the Hoval and the country specific boiler water regula- tions have to be respected and local waste water regulations have to be paid attention to. Detailed information for the boiler water quality can be found in the appendix.

Delivery

The pressure body is provided with a primer. Due to transport reasons the insulation can be fixed at the factory. Burner armatures and control panel are either pre-mounted (as far as transport technically possible) or packed loosely in a separate box. The mounting and wiring can be done at the factory or at site. Connection openings are covered.

On request

Volt-free contacts for BMS connection (Building Management System)

THW-I NTE

Industrial hot water boiler for oil and gas firing

Description

THW-I NTE

Finned tube wall (reversechamber):

Due to the finned

tube wall a completely water cooled turning chamber of the first to the second pass secure a maximum utilisa

tion of the heat.

Insulation:

A highly effective

thermal insulation with alu

minium boarding reduces the standby losses to a minimum and contributes to highest economy.

Boiler door:

Large boiler door provides easy ac-

cess for cleaning of the combustion chamber to the second and third pass. The boiler door can beeasily opened by the special hinge construction tothe left or right. The boiler door with an optimisedthermal insulation helps to reduce the calorificlosses of the boiler to a minimum. Heating surface:

The smooth flue gas

flame tube without any turbulators reduces the exhaust gas losses and makes an easy and fast cleaningpossible for an economical operation. Burner:

The boiler can be optimally

fitted with LowNOx burners due tocombustion chamber geometry andthe low combustion chamber load.

Return injection:

The return water from the heating system is

led into the warm area of the boiler. Because of the special return injection the entering water into the boiler will be turned by 90° and accelerated by a baffle plate. By injector effecthot water will be sucked in and will be mixed intensively withthe cold water. Thereby the temperature of the return waterincreases.

Sectional view

THW-I NTE Technical data

Boiler ancillary equipment

Type (23/15) (28/20) (35/25) (40/30) (45/35) (50/40)

• 1 safety valve 6 bar DN 50/80 DN 65/100 DN 65/100 DN 65/100 DN 65/100 DN 80/
• 1 safety valve 10 bar DN 40/65 DN 50/80 DN 50/80 DN 50/80 DN 65/100 DN 65/
• 1 temperature switch R ½″ R ½″ R ½″ R ½″ R ½″ R ½″
• 1 temperature limiter STB R ½″ R ½″ R ½″ R ½″ R ½″ R ½″
• 1 pressure gauge R ½″ R ½″ R ½″ R ½″ R ½″ R ½″
• 1 pressure limiter SDB R ½″ R ½″ R ½″ R ½″ R ½″ R ½″
• 1 low water level indicator (Syr) R ½″ R ½″ R ½″ R ½″ R ½″ R ½″

Boiler return flow heat up

Type (23/15) (28/20) (35/25) (40/30) (45/35) (50/40)

• 1 pump 120 °C [m 3 /h] 35 40 45 60 65 75
• 1 thermostat [DN] R ½″ R ½″ R ½″ R ½″ R ½″ R ½″
• 1 non return valve [DN] 65 80 80 80 80 100
• 2 non return flaps [DN] 65 80 80 80 80 100

Boiler basic equipment

Type (23/15) (28/20) (35/25) (40/30) (45/35) (50/40)

• 1 drain ball valve [DN] 40 40 40 40 40 40
• 1 ventilation valve (fitting pipe) [DN] ½″ ½″ ½″ ½″ ½″ ½″
• 1 thermometer flow [DN] ½″ ½″ ½″ ½″ ½″ ½″
• 1 thermometer return flow [DN] ½″ ½″ ½″ ½″ ½″ ½″
• 1 safety thermostat [DN] ½″ ½″ ½″ ½″ ½″ ½″
• 1 cleaning set Brush with rod

Fitting pipe

Type (23/15) (28/20) (35/25) (40/30) (45/35) (50/40)

• 1 fitting pipe without insulation (flow intermedi- ate piece) (dimension for ∆T = 20 K)

DN 150 DN 150 DN 150 DN 200 DN 200 DN 200

1 connection pipe

Type (23/15) (28/20) (35/25) (40/30) (45/35) (50/40)

• 1 connection pipe [DN] 65 80 80 80 80 100

Subject to project-related alterations

THW-I NTE Technical data

THW-I NTE (55/45-100/90)

Technical data

Type (55/45) (60/50) (70/60) (80/70) (90/80) (100/90)

• Nominal output (oil and gas) kW 5500/4500 6000/5000 7000/6000 8000/7000 9000/8000 10000/
• Operating temperature max. (SBT) 1)

°C 120 120 120 120 120 120

• Temperature level flow/return °C 80/60 80/60 80/60 80/60 80/60 80/
• Safety valve pressure bar 6 6 6 6 6 6 bar 10 10 10 10 10 10
• Boiler efficiency at 80/60 °C (natural gas)

• Flue gas resistance mbar 12.0/9.0 13.0/9.5 13.0/10.0 14.0/10.5 14.0/11.0 15.0/12.
• Water content l 7000 8000 9000 10000 11500 13000
• Water flow resistance * mbar 150 150 200 150 200 200 z-value ** 0.00254 0.00213 0.00209 0.00120 0.00126 0.
• Flue gas temperature after boiler (natural gas)

°C 202/181 203/184 201/184 202/188 201/188 200/

• Flue gas temperature after boiler (diesel oil)

°C 194/174 195/177 193/177 195/181 193/181 193/

1. (^) Country and equipment specific

• for boiler max. load and ∆T = 20 K ** for other flow rates use “z-value” for water side pressure loss calculation: ∆p (mbar) = asked flow rate (m^3 /h)^2 * z

Dimensions and weights

Type (55/45) (60/50) (70/60) (80/70) (90/80) (100/90)

• Flame tube diameter 6 bar mm 1025 1050 1100 1150 1200 1250 10 bar mm 1025 1050 1100 1150 1200 1250
• Flame tube length without turning chamber

mm 4370 4420 4620 4820 5120 5420

• Boiler length with insulation, without burner

mm 5380 5430 5630 5830 6230 6530

• Boiler width with insulation, without armatures

mm 2220 2270 2370 2470 2570 2670

• Boiler height with insulation, with armatures

mm 3300 3400 3600 3700 3800 3900

• Diameter flue gas outlet mm 650 650 700 750 750 800
• Transport weight without burner incl. equipment 6 bar kg 9200 10000 11200 12500 14000 16000 10 bar kg 10800 12200 13500 15000 17000 18500

THW-I NTE Technical data

THW-I NTE (120/100)

Technical data

Type (120/100) 2)

• Nominal output (oil and gas) kW 12000/
• Operating temperature max. (SBT) 1)
• Temperature level flow/ return

°C

°C

• Safety valve pressure bar bar

• Boiler efficiency at 80/60 °C (natural gas) % 91.6/92.
• Flue gas resistance mbar 15/
• Water content l 14000
• Water flow resistance * mbar 250 z-value ** 0.
• Flue gas temperature after boiler (natural gas) °C 200/
• Flue gas temperature after boiler (diesel oil) °C 193/

1. (^) Country and equipment specific
2. (^) According to EN 14394 max. allowed load = 10 MW

• for boiler max. load and ∆T = 20 K ** for other flow rates use “z-value” for water side pressure loss calculation: ∆p (mbar) = asked flow rate (m^3 /h)^2 * z

Dimensions and weights

Type (120/100)

• Flame tube diameter 6 bar 10 bar

mm mm

• Flame tube length without turning chamber mm 5520
• Boiler length with insulation, without burner
• Boiler width with insulation, without armatures
• Boiler height with insulation, with armatures

mm

mm

mm

• Diameter flue gas outlet mm 850
• Transport weight without burner incl. equipment

6 bar kg 18000 10 bar kg 21000

THW-I NTE Technical data

Subject to project-related alterations

Fitting pipe

Type (120/100)

• 1 fitting pipe without insulation (flow intermediate piece) dimension for ∆T = 20 K, * dimension for ∆T = 30 K

DN 300

Boiler basic equipment

Type (120/100)

• 1 drain ball valve [DN] 40
• 1 ventilation valve (fitting pipe) [DN] ½″
• 1 thermometer flow [DN] ½″
• 1 thermometer return flow [DN] ½″
• 1 safety thermostat [DN] ½″
• 1 cleaning set Brush with rod

Boiler return flow heat up

Type (120/100)

• 1 pump 120 °C [m^3 /h] 175
• 1 thermostat [DN] R ½″
• 1 non return valve [DN] 150
• 2 non return flaps [DN] 150

Boiler ancillary equipment

Type (120/100)

• 1 safety valve 6 bar DN 125/
• 1 safety valve 10 bar DN 100/
• 1 temperature switch R ½″
• 1 temperature limiter STB R ½″
• 1 pressure gauge R ½″
• 1 pressure limiter SDB R ½″
• 1 low water level indicator (Syr) R ½″

1 connection pipe

Type (120/100)

• 1 connection pipe [DN] 150

THW-I NTE Technical data

Flue gas temperature and boiler efficiency

In dependence on the boiler efficiency with a boiler water temperature of 80/60 °C.

The output of the boiler in % referring to nominal output

Flue gas temperature in °C

Boiler efficiency in %

Flue gas temperature in °C

Boiler efficiency in %

I

II

Flue gas temperature and boiler efficiency

In dependence on the boiler efficiency with a boiler water temperature of 80/60 °C and a rest of 3%

oxygen in the flue gas.

I Flue gas temperature in °C

II Boiler efficiency in %

Flue gas temperature and boiler efficiency

THW-I NTE Dimensions

1) DN/...PN 16

3. (^) Diameter for standard ∆T = 20 K (from THW-I 140/120 NTE upwards ∆T = 30 K), other dimensions on request
4. (^) without fitting pipe

THW-I NTE without economiser - subject to construction-caused alterations

Pressure stage 6 or 10 bar (overpressure). Dimensions for boiler design pressure 10 bar Safety valve dimensions for boiler design pres- sure 6 bar For transport lugs 100 mm to H 1 , are to add.

Further pressure stages on request! Dimensions incl. 100 mm insulation.

1 Boiler (with flue gas collector) 2 Boiler base (to THW-I NTE (45/35) with U-girder, from THW-I NTE (50/40) with I-girder) 3 Hinged door, incl. reversal chamber 2nd/3rd smoke gas pass

4 Flue gas outlet with 1 x ½″ fitting 5 Explosion flap and cleaning opening 6 Inspection opening 7 Fitting pipe PN 16 8 Boiler outlet nozzle

9 Return flow nozzle 10 Safety valve nozzle PN 16 11 Drain nozzle DN 40/PN 16 12 Burner 13 Condensate drain nozzle 1″ 14 Flame peephole 15 Admixing nozzle (BS)

• from boiler size 90/ upward = 950 mm

Main dimensions Boiler foundation Transport dim OL/IL nozzle Flue gas con. SV BS

Boiler B L H H 1 H 2 D L 1 L 2 B 1 B 2 Bmin H 4)min A A 1 DN 1),3)^ H 3 D 1 DN1)^ DN1) type Width Length

(23/15) 1770 3430 2600 1960 1000 1700 2650 230 1250 60 2000 2160 1600 600 150 1400 450 50 65 (28/20) 1870 3930 2800 2060 1050 1800 3000 230 1350 60 2100 2260 1800 600 150 1500 500 65 80

(35/25) 1970 4280 2900 2160 1100 1900 3500 230 1400 60 2200 2360 2100 700 150 1550 500 65 80 (40/30) 2020 4580 2950 2210 1125 1950 3500 230 1450 60 2250 2410 2100 700 200 1600 550 65 80

(45/35) 2070 4730 3000 2260 1150 2000 3500 230 1500 60 2300 2460 2100 700 200 1650 600 65 80 (50/40) 2170 5330 3250 2410 1250 2100 4000 350 1550 160 2400 2610 2500 800 200 1750 600 80 100

(55/45) 2220 5380 3300 2460 1325 2150 4000 350 1600 160 2450 2660 2500 800 200 1800 650 80 100 (60/50) 2270 5430 3400 2560 1350 2200 4500 350 1650 160 2500 2760 2500 800 250 1850 650 80 100

(70/60) 2370 5630 3600 2660 1400 2300 4500 350 1700 160 2600 2860 2500 800 250 1900 700 100 125 (80/70) 2470 5930 3700 2760 1450 2400 5000 350 1800 160 2700 2960 3000 900 250 2050 750 100 125

(90/80) 2570 6230 3800 2860 1500 2500 5000 350 1850 160 2800 3060 3000 900 250 2100 750 100 150 (100/90) 2670 6530 3900 2960 1550 2600 5500 350 1950 160 2900 3160 3000 900 300 2200 800 100 150

(120/100) 2770 6630 4200 3060 1600 2700 5500 350 2000 160 3000 3260 3000 900 300 2300 850 125 150

THW-I NTE Engineering

Rules and regulations

The following rules and regulations have to be respected:

• Hoval technical information and installation guide.
• hydraulic and control technical regulations, to guarantee the min. admissible boiler tem perature and the conditions for a safe operation according to national regulations.
• fire protection regulations
• national regulations concerning permission, installation and operation of boiler applianc- es. Boiler appliances have to be installed ac cording to national laws and regulations and accessories requirements.
• Besides the national and local regulations the project specific circumstances of the boiler supplier have to be considered for every application.

Water treatment/water quality

• The quality of the boiler water has to be guaranteed according to Hoval technical in- formation and national regulations.
• Hoval boilers must only be operated with treated water. For the treatment of water apply for the values to be kept refer to the Hoval guide lines.
• Requested water quality: see supplement.
• Do not use chemical additives such as anti-freeze, inhibitors, etc. without written confirmation from Hoval.
• Old and new installations must be well flush- ed before filling.
• The water quality should be monitored and recorded.

Planning, operation and

maintenance

• National and local rules and regulations have to be considered for the fuel supply.
• Safety and exhaust valve connections must be able to discharge the system pressure without any risk.
• Filters and strainers have to be cleaned periodically, especially if installed in front of control devices.
• The components containing heat and the pipes are to be insulated in order to reduce radiation losses.

Combustion air

• The supply of combustion air must be gua- ranteed for a safe and economic operation. There must be no possibility to close the air supply opening.
• Aeration and ventilation of the boiler house has to be secured.
• In the installation room no negative pressure larger than 3 N/m 2 is allowed. To adhere to this demand, plan a cross free section for the air supply opening of at least 200 cm 2 , resp. 2 cm 2 per kW output. The aspect ratio for rectangular openings should not be more than 1.5 : 1. If the opening is trellised an adequate sur- charge is needed. National laws have to be respected.
• Boilers are not to be installed in rooms where halogen compounds occur which can enter the combustion air. (e.g. laundries, dry- ing, etc.).

Noise level reduction

The following measures for noise level reducti- on are possible:

• Solid construction of heating room walls, ceiling and floor, installation of silencer in fresh air supply, noise insulation for support and bracket of pipes.
• Installation of sound attenuation cowl for burner.
• A substantial part of the sound caused in the combustion chamber and in the top heating surfaces is radiated from the flu gas system as sound transmitted by air. In addition to this, resonance features, depending on chimney dimensioning and inlet, may occur which are triggered by the oscillation of the combustion noises (snooping). These sounds can be reduced by burner-lateral measures, e.g. changes of flame geometry, atomisation characteristics or fuel throughput.
• Flue gas sound absorbers cause a substan- tial sound level reduction as well. These sound absorbers should usually be tuned at low frequencies of 60 - 250 Hz. Flue gas sound absorbers function according to the principle of sound absorption. The kinetic energy of the exhaust gases is consumed by friction requiring an increase in chimney draft in the flue gas system. This has to be considered for burner dimensioning. The connection piece form the boiler to the flue gas sound absorber has to be gas-tight be- cause the draft- and pressure-zero point is behind the flue gas sound absorber.
• The necessary space requirement of approx. 2 m for the later installation of a flue gas sound absorber should already be included when planning.

Chimney/flue gas system

Flue gas line

• The flue gas connection pipe between the boiler and the vertical part of the flue gas line should be routed into the vertical part with a 30-45° incline.
• Thermal insulation is required with a length of more than 1 m
• The insertion of the connection tube into the chimney must be carried out in such a way that no condensate can flow into the boiler
• A closable flue gas test port with a circular internal diameter of between 10-21 mm must be installed in the connection tube. The port must protrude beyond the thermal insulation

D 2 x D (^) 1D

< 2D

D Flue gas system

• The flue gas system must be humidity-insen- sitive and acid-proof and admitted for flue gas temperatures up to >200 °C.
• For existing flue gas systems the restorati on must be carried out according to the instruc- tions of the chimney constructor.
• Calculation of the chimney section based on EN 13384 and EN 1443.
• Planning a bypass air flap as a chimney limita- tion is recommended.

Start-up condensate from the boiler

• When commissioning a cold boiler, condensate always occurs within the boiler. This collects in the lower area of the boiler (flue gas collector) and is then evaporated through the boiler’s continued heating up.
• The boiler should therefore – due also to this reason – only be started up without “network acceptance”, so that the condensation temper- ature threshold (approx. 55 °C) is exceeded as quickly as possible
• If necessary, the condensate which occurs can be drained via the flue gas collector’s cleaning fitting (remove cap on the drain connection before starting the burner, connect ball valve and temperature-resistant drain hose).

Remarks

• When draining the condensate, it must be ensured that no uncontrolled escape of flue gas occurs in the installation room (do not keep the ball valve open “constantly”, but only drain off the condensate “intermit- tently”).
• The locally valid waste water regulations must be observed when disposing of the condensate!
• As soon as the boiler has reached its minimum temperature and this can be kept stable via the return boost, the burner should be shut off briefly and the closure cap mounted on the cleaning drain connection again.
• The drain connection on the boiler’s flue gas collector is not intended for the permanent con- nection of a drainage line – frequent condensa- tion in the area of the boiler is impermissible!

THW-I NTE Engineering

1. (^) Noted in the past as °dH, changing factor: 1 mmol/l = 5.6 °dH (German hardness)
2. (^) Noted in the past as p-value, changing factor: KS 8.2 = 1 according p-value = 1
3. (^) Measuring only necessary if dosing chemicals are used which contains these values.
4. (^) For level electrodes minimum conductivity > 5 μS/cm

It is not necessary to make continuous control of following parameters: silicic acid (SiO 2 )

Important notice: Hoval recommends that a water treatment specialist is employed to carry out routine monitoring of the supply water in order to ensure it remains within specification. (^).

Guiding lines for boiler water and system water specifications for pump circulation boilers (large water room boiler)

Operating pressure bar > 0.5 ≤ 25 General requirements colourless, clear, free from suspended matter and foam pH value at 25 °C 9.0-11.

Sum of earth alkalies (Ca + Mg) 1)^ mmol/l °dH

Conductivity at 25 °C 4)^ μS/cm < 1500

Acid capacity KS 8.2 2) (p-value)

mmol/l 1-

Silicic acid (SiO 2 ) mg/l < 100 Phosphate (P 2 O 4 ) 3)^ mg/l 10-

Sodium sulphite (Na 2 SO 3 ) 3)^ mg/l 5- Iron (Fe) mg/l < 0.

Copper (Cu) mg/l < 0. Oil/fat mg/l < 1.

Oxygen (O 2 ) mg/l < 0.

Boiler water specifications

aqua3 E

Industrial hot water boiler for oil and gas firing

Description

aqua3 E

Return injection:

The return water from the heating system is led into

the warm area of the boiler. Because of the special return injection theentering water into the boiler will be turned by 90° and accelerated bya baffle plate. By injector effect hot water will be sucked in and will bemixed intensively with the cold water. Thereby the temperature of thereturn water increases.

Finned tube wall (reversechamber):

Due to the finned

tube wall a completely water cooled turning chamber of the first to the second passsecure a maximum utilisa-tion of the heat.

Insulation:

A highly effective

thermal insulation with alu- minium boarding reduces the standby losses to a minimum and contributes to highest economy.

Boiler door:

Large boiler door provides easy ac-

cess for cleaning of the combustion chamber to the second and third pass. The boiler door can be easilyopened by the special hinge construction to the leftor right. The boiler door with an optimised thermalinsulation helps to reduce the calorific losses of theboiler to a minimum. Heating surface:

The smooth flue gas

flame tube without any turbulators reduces the exhaust gas losses and makes an easy and fast cleaningpossible for an economical operation. Burner:

The boiler can be optimal-

ly fitted with LowNOx burners dueto combustion chamber geometry and the low combustion chamber load.

Sectional view

aqua3 E Technical data

Dimensions and weights

Type (1000) (2000) (3000) (4000) (5000) (6000)

• Flame tube diameter 10 bar mm 600 740 860 920 980 1050

13 bar mm 600 740 860 920 980 1050 16 bar mm 600 740 860 920 980/1080 1050/

• Flame tube length without turning chamber mm 1764 2606 3206 3610 4056 4306
• Boiler length with insulation, without burner mm 2830 3680 4280 4680 5130 5480
• Boiler width with insulation, without armatures mm 1660 1910 2110 2210 2310 2460
• Boiler height with insulation, without assembly tube mm 1800 2050 2250 2450 2550 2700
• Diameter flue gas outlet mm 300 450 500 600 650 750
• Transport weight without burner incl. equipment 10 bar kg 3500 5000 7500 9200 11100 13300 13 bar kg 3800 5500 8300 10000 11400 14300 16 bar kg 4100 6000 8800 10800 12500 15200

aqua3 E (1000-6000)

Technical data

Type (1000) (2000) (3000) (4000) (5000) (6000)

• Nominal output (oil firing) kW 1000 2000 3000 4000 5000 6000
• Nominal output (gas firing) kW 1000 2000 3000 4000 5000 6000
• Operating temperature max. (SBT) 1)^ depending on net pressure
• Temperature level flow/return depending on net pressure
• Safety valve pressure bar 10 10 10 10 10 10 bar 13 13 13 13 13 13 bar 16 16 16 16 16 16
• Boiler efficiency at 120 °C (natural gas) * % 89.2 89.6 89.7 89.6 89.4 89.
• Boiler efficiency at 120 °C (diesel oil) * % 89.9 90.3 90.3 90.2 90.1 90.
• Flue gas resistance mbar 8.0 9.0 10.0 11.0 11.0 11.

at max. boiler load of kW 1000 2000 3000 4000 5000 6000

• Water content l 2150 4000 5810 6890 8310 10020
• Water flow resistance ** mbar 95 65 72 52 80 110 z-value *** 0.05264 0.00901 0.00406 0.00181 0.00178 0.
• Flue gas temperature after boiler (natural gas) °C 246 240 241 244 248 247
• Flue gas temperature after boiler (diesel oil) °C 235 230 231 234 238 237

1. (^) Country and equipment specific

• efficiency for boiler middle temperature ** for boiler max. load and ∆T = 20 K *** for other flow rates use “z-value” for water side pressure loss calculation: ∆p (mbar) = asked flow rate (m^3 /h)^2 * z