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Products  |  Thermal Engineering and HVAC  |  Heating and Ventilation in Buildings  |  HL 353
HL 353 Hot Water Generator Show data sheet (pdf file) Print page
Technical Description

  The hot water generator HL 353 is the supply unit for the trainers HL 353.01 and HL 353.02. A complete domestic heating system can be set up together with HL 353.01 and/or HL 353.02. All components are commercially available and have a high practical relevance.

  The boiler together with oil burner, burner control and necessary safety devices is the main element of the supply unit. An oil tank with pump and safety fittings provides fuel. The trainers HL 353.01 and/or HL 353.02 are connected by quick-release couplings to the feed and return flow connectors. A circulating pump in the feed flow supplies the connected trainers with hot water.

  Dial thermometers are mounted at different points on the supply unit. The piping system contains several measuring points. Temperatures can be measured using two sensors; pressures for determining the differential pressure can be measured using a manometer at these measuring points.

  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments. 

Learning Objectives / Experiments

- set-up of a hot water heating system for room


- function and design of commercially available


- boiler with oil burner, burner control and safety


- measurement of differential pressures and



Together with HL 353.01 and/or HL 353.02
- set-up of a complete heating system
  * operation, function, control, energetic evaluation

    and calculation of emitted heating capacity

- reading and comprehension of symbols and

  process schematics




* Set-up of a complete domestic heating system

  together with HL 353.01 and/or HL 353.021

* Boiler with oil burner, oil tank and burner control1

* Design with high practical relevance by using

  commercially available heating technology


Available accessories
HL 353.01 -- Comparison of Different Heating Types
HL 353.02 -- Heat Distribution and Control in Heating Systems
HL 353 Modular Hot Water System

[1] hot water generation for room heating

[2] together with HL 353.01 and/or HL 353.02: set-up of a complete domestic heating system

[3] boiler with oil burner, boiler safety group, low water-level switch and circulating pump in feed flow

[4] oil tank with pump and safety fittings

[5] 3 dial-gauge thermometers

[6] 2 temperature sensors and 1 differential pressure manometer for measurement of temperature and pressure at different measuring points

[7] hot water connections with quick-release couplings


Technical Data


- heating capacity: 17...21kW

- max. water temperature: 75C

- water content: 50L

- max. operating pressure: 3bar

Boiler safety group according to DIN 4751

- 2,5bar
- 50kW

Expansion vessel
- capacity: 12L
- max. pressure: 3bar

Circulating pump, feed flow

- max. power consumption: 60W

- max. flow rate: 3600L/h

- max. head: 4m

Oil tank: 36L


Measuring ranges
- temperature: 1x 0...300C, 4x 0...100C

- differential pressure: 0...2,5bar 


Dimensions and Weight

l x w x h: 1950 x 750 x 2400 mm

Weight: approx. 255 kg

Required for Operation

230V, 50Hz, 1 phase

Exhaust gas routing required (exhaust gas pipe DN 130) 

Water connection and drain recommended

Scope of Delivery

1 supply unit

1 set of instructional material

Order Details
065.35300  HL 353  Hot Water Generator
© 2005 G.U.N.T. Gerätebau GmbH