Thermona Therm 28 KD Installation Manual Download Page 6

 

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PRODUCTION CHECK 

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All boiler parts are rechecked and set by the manufacturer before they are assembled. Each boiler is tested for 

water system staunchness, gas system staunchness; regulating and safety components are rechecked and set. 

 

 

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 INSTRUCTIONS FOR INSTALLATION 

Boiler mounting can only be done by a qualified expert company, while this has to respect all the advice and 

notes in this manual. The mounting has to be carried out in correspondence with valid local norms and regulations.  

The mounting company is required to check the suitability of the chosen boiler with respect to its functional 

character and customer’s requirements. Further, it is necessary to check the label on the packaging to be sure the 
delivered boiler corresponds with the ordered boiler and the fuel type. When it is unpackaged it is necessary to 
check if the delivery is correct and complete. In case of any doubts, inform the manufacturer or the supplier before 
mounting. 
  

 

 

POSITION OF THE BOILER 

The THERM 28 KD boilers may be placed both in the interior and in the non-residential areas of a house (in a 

boiler room, etc.). When placing the boiler inside a flat it is recommendable to set the limitation of maximum boiler 
output at the lower level of the power loss range and reduce thus the noise that the boiler makes when being 
operated at a lower output level. 

The boilers are equipped with IP 41 covering of electrical parts and their position in all rooms in which there is a 

tub or shower or which are used for bathing, must comply with the valid local norms. 

The room where the boiler is placed must be a “common basic environment” as it is defined in the valid 

regulations, which means that it has to be protected against frost with ambient temperature ranging from + 5 °C to 
+ 35 °C with relative humidity lower than 80 %. 
According to the valid norms, there are certain objects that must not get closer to the boiler than: 

100 

mm 

for objects made of not easily flammable, heavily flammable and medium 
flammable materials. 

200 mm  

for objects made of easily flammable materials (e.g. fibreboards, cellulose materials, 
polyurethane, polystyrene, polyethylene, PVC, etc.)  

Important: 

No flammable objects can be placed closer than at the safe distance from the boiler (the minimum distance of the 

appliance from flammable materials is 50 mm in the direction of the main heat radiation and 10 mm in the other 
directions). 

Before you start doing anything that could possibly change the environment of the installed boiler (e.g. working 

with paints, adhesive agents, etc.), you must switch the boiler off by the mode switch (pointer to the left). 
 
 

 

 

 

BOILER HANGING 

Before the boiler is mounted make sure the chosen place meets the requirements for flue exhaust placement and 

for minimum distances stated in the previous sections. Using the dimension scheme (see back pages in this manual) 
prepare the anchorage by which the boiler will be mounted. 

 

 

 

BOILER CONNECTION TO WARM WATER SYSTEM  

  Since the THERM boiler is a warm-water through-flow boiler that is equipped with its own pump, it is possible to 
connect it to any existing gravity circulation system or to any new technologies designed for the forced water 
circulation in the heating system. With regard to the rapid temperature rise and a relatively high flexibility of the 
system, it is recommendable to use small volume radiators and the least dimensioned piping in the case of a new 
distribution system. The piping system has to be duly projected on the basis of hydraulic ratio calculations and total 
transmitted power. In order to use the condensation regime as effectivelly and economically as possible it is 
advisable to dimension the heating system for lower temperatures (

t = 50/30 °C). If you want to achieve the 

maximum output of the flue exchanger and ensure a proper functioning as well as long durability of the whole 
system, it is necessary that the minimum excess pressure of the heating system be 0.8 bar. 

Before the boiler is connected to the heating system it is necessary to rinse it very carefully, so that all impurities 

and sediments can be removed. The heating system has to be equipped with a suitable filter and comply with the 
local norms.The inbuilt expansion vessel enables the boiler to be connected to a sealed heating system.  

 

The necessary expansion volume for the given system must be calculated according to the following formula: 

 

Summary of Contents for Therm 28 KD

Page 1: ...Manual for Installation and Maintenance of Condensing Boilers Therm 28 KD KDZ KDC...

Page 2: ...INSTRUCTIONS FOR OPERATION AND MAINTENANCE 9 OPERATING THE BOILER 9 7 DIMS03 TH01 MODULATION ELECTRONICS 11 8 SIT 848 SIGMA GAS FITTING 14 9 GUARANTEE AND LIABILITY FOR DEFECTS 15 10 GRAPHS OF THE US...

Page 3: ...ular burner and a modified pipiline conducting the air gas mixture The approriate rationing of the air gas mixture and its mixing is ensured by a mixer and a special gas fitting The latter contains a...

Page 4: ...perations and the electric circuits participating in the ignition of the burner Important The type of supply of the ionizing current is determined by the neutral It is therefore crucial that the neutr...

Page 5: ...stem excess pressure bar 0 8 0 8 0 8 Max DHW inlet pressure bar 6 Min DHW inlet pressure bar 0 5 Max heating water outlet temperature o C 80 80 80 Coaxial flue exhaust diameter mm 60 100 60 100 60 100...

Page 6: ...materials polyurethane polystyrene polyethylene PVC etc Important No flammable objects can be placed closer than at the safe distance from the boiler the minimum distance of the appliance from flamma...

Page 7: ...by a professional company with valid certification and its professional certified employees and according to the approved documentation for gas fitting The gas regulator is not to be fitted in front...

Page 8: ...ng system is filled with water the boiler must be unplugged i e the plug must be out of the socket The recommended heating water pressure ranges from 1 to 1 5 bar when the system is cold The heating s...

Page 9: ...imum Plug the cable into the socket and start the boiler by turning the mode switch Turn the mode switch for a short time to malfunction unblock position so that the boiler gets automatically ignited...

Page 10: ...ay The meaning of the used symbols temperature failure modes and service data in digital numbers DHW regime DHW temperature displayed heating mode heating temperature displayed boiler burning temperat...

Page 11: ...l value 6 Offset of the weather compensation curve the numerical value 7 Running speed of the ventilator without a symbol the numerical value x 10 8 Back to the standard indication Once the setting ha...

Page 12: ...t this moment the burning in the boiler is stopped while the circulation pump is still in operation and the time limit of the repeated ignition is put into operation the service setting of the time li...

Page 13: ...t the starting power circa 10 sec after the boiler s ignition and increases the boiler output at the maximum level so that the outlet temperature that was previously set by the user can be achieved as...

Page 14: ...the air gas ratio air pressure signal inlet module for measuring the outlet gas pressure setting of the starting point of regulation SIT 848 SIGMA is a gas fitting with proportional regulation air ga...

Page 15: ...and maintenance The guarantee covers neither situations caused by non standard conditions in the distribution network voltage fluctuation and overvoltage peaks gas pressure and purity etc nor defects...

Page 16: ...28 KDC KDZ 0 0 50 0 100 0 150 0 200 0 250 0 300 0 350 0 400 0 450 0 500 0 0 4 0 6 0 8 1 1 2 Water through flow m 3 h Outlet excess pressure mbar Wilo 3 Grunfos 3 Warning The curves of the applicable c...

Page 17: ...11 Wiring connect of the THERM 28 KD boilers with the DIMS03 TH01 automatics 17...

Page 18: ...12 Wiring connect of the THERM 28 KDC boilers with the DIMS03 TH01 automatics 18...

Page 19: ...19 13 Wiring connect of the THERM 28 KDZ boilers with the DIMS03 TH01 automatics...

Page 20: ...re no 23640 Ventilator MVL 130 24 store no 22141 Ionizing electrode store no 20342 Mixer SIT store no 40390 Gas valve SIT store no 40848 Expansion vessel 7l store no 22168 Seal pipe store no 23405 Blo...

Page 21: ...noni condensation device store no 23821 Ignition electrode store no 23640 Ventilator MVL 130 24 store no 22141 Ionising electrode store no 20342 Mixer SIT store no 40390 Gas valve SIT store no 40848 E...

Page 22: ...izing electrode strore no 20342 Mixer SIT store no 40390 Gas valve SIT store no 40848 Expansion vessel 7l store no 22168 Seal pipe store no 23405 Blocking thermostat store no 40035 Transformer 220V 24...

Page 23: ...17 HANGING THERM 28 KD KDZ KDC BOILERS I 23...

Page 24: ...sely to each other not further than 50 cm that they are exposed to the same climatic conditions C43 Separated connection to two pipelines within the same shaft The outlet of both shafts is either conc...

Page 25: ...the requirements of valid norms and regulations The product packaging should be taken to the paper disposal area while the package film should be disposed in the public containers in which the plastic...

Page 26: ...e authorized person 202 THERM 28 KD THERM 28 KDC THERM 28 KDZ certificate for type testing according to the EC directives for gas appliances 90 396 EEC No E 30 00712 02 THERM 28 KD THERM 28 KDC THERM...

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