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Products  |  Thermal Engineering and HVAC  |  Heating and Ventilation in Buildings  |  HL 353.01
HL 353.01 Comparison of Different Heating Types Show data sheet (pdf file) Print page
Technical Description

  A complete domestic heating system can be set up using the trainer HL 353.01 together with a hot water generator, e.g. HL 353. Hot water passes through the radiators and heats the room air.

  HL 353.01 contains two heating circuits. Both circuits are equipped with commercially available heating technology control devices. Each heating circuit contains a circulating pump. A digital, temperature led (outside temperature) heating controller controls the heating circuit (A) with floor heating. A three-way mixing valve is the actuator. The second heating circuit (B) contains a forced convector with temperature controller, a radiator with thermostatic valve and a radiator with one-pipe radiator valve.

  The trainer is supplied with hot water from the supply unit HL 353 and is connected to the feed and return flow connectors using hoses with quick-release couplings. 

  Measuring points for temperature, pressure, differential pressure and flow rate enable energy calculations and evaluations.

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

Learning Objectives / Experiments

- design of a floor heating with controller and actuator
  * temperature-led heating controller (outside

    temperature) with three-way mixing valve

- design of a room heating system with radiators
  * thermostatic valve
  * one-pipe radiator valve

- design of a room heating system with forced

  convector with temperature controller

- function and design of commercially available

  heating technology components

- measurement of differential pressures,

  temperatures and flow rates

- energy calculation and evaluation of emitted

  heating capacity

- reading and comprehension of symbols and

  process schematics


* Set-up of a complete domestic heating system

  together with hot water generator HL 3531

* 2 independent heating circuits:
  - floor heating
  - forced convector with fan, 2 radiators1

* Control devices for both heating circuits

HL 353 Modular Hot Water System

[1] together with hot water generator: set-up of a complete domestic heating system with 2 independent heating circuits

[2] heating circuit (A) with floor heating, circulating pump, heating controller, and 3-way mixing valve

[3] heating circuit (B) with forced convector with fan, 2 radiators and circulating pump

[4] 1 radiator with thermostatic valve and 1 radiator with 1-pipe radiator valve

[5] room temperature controller for fan of forced convector

[6] measurement of flow rate and pressure

[7] 8 measuring points for differential pressure and temperature (temperature measurement via sensors of HL 353)

[8] hot water connections with quick-release couplings


Technical Data

Floor heating, Cu pipes 

- length: 7500mm

- diameter pipe: 14mm

- wall thickness: 0,8mm

- filling volume: 1,2L/m

Radiator, steel

- heating capacity: 492W at feed flow 70C,

  return flow 55C and ambient temperature 20C

Air heater

- heating capacity: 7,14...9,32kW at feed flow 90C,

  return flow 70C and inlet temperature 15C

- max. flow rate: 1260m/h


- max. power consumption: 60W

- max. flow rate: 3600L/h

- max. head: 4m

Thermostatic valve: 5...26C


Measuring ranges

- pressure: 2x 0...1,6bar

- differential pressure: 1x 0...0,25bar

- flow rate: 1x 15...160L/h, 1x 100...1000L/h,

  1x 20...250L/h


Dimensions and Weight

LxWxH: 2500x760x2000mm

Weight: approx. 185kg

Required for Operation
230V, 50Hz, 1 phase
Scope of Delivery

1 trainer

1 set of accessories (hoses, tools)

1 set of instructional material

Order Details

065.35301  HL 353.01  Comparison of Different

                                      Heating Types

© 2005 G.U.N.T. Gerätebau GmbH