Manual Thermona THERM EL 15 (page 9 of 37) (English)

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boiler is installed in the permitted zones, relevant electric current accident protection must be concurrently

performed in accordance with the same standard, too.

The installation location must be chosen which will allow sufficient access for the operator as well as service

inspector.

Degree of shielding of the boiler electric components is IP 40.

♦ Wall-mounting of the boiler

Electric boiler is mounted on the wall by means of a

fixing strip (1) supplied with the boiler according to the

Figure in the Chapter “Wall-mounting of the boiler”. If

the boiler is mounted on a wall with a lower carrying

capacity, it is recommended to consult the installation

with a civil engineering technician. Free space of at least

200 mm below and 750 mm above the lower and upper

edges of the jacketing shall be left for the purposes of

inspecting the boiler or replacing the heating bodies (see

Figure depicting the boiler wall-mounting and

installation).

♦ Connecting the boiler to the hot-water heating system

Electric boiler must be connected to the distribution network in a manner preventing its aeration.

Connection to the heating system must be tackled in a project design calculating hydraulic ratios of the

whole system because the installation involves a hot-water flow-through boiler fitted with an integrated pump.

It needs be noted that minimum flow through the boiler must be constantly assured for the designated boiler

output at maximum thermal gradient of the heating system amounting to 20°C. Any reduction of this flow (due

to integrated high hydraulic friction elements) results in insufficient circulation and drop in life-time of some

boiler parts. To utilize the maximum output of the heat exchangers, ensure correct functioning and high

durability, the minimum heating system overpressure must amount to 0.8 bar.

Proper rinsing of the heating system resulting in the removal of all impurities must be performed prior to

testing and launching the operation of the whole system in line with CSN 06 0310 within the framework of the

installation. A suitable filter must be unconditionally fitted in the recuperative water inlet from the heating

system into the boiler to prevent impurities from entering the boiler system.

The heating system must be installed in accordance with CSN 06 0830 -- Safety equipment for central

heating and domestic hot water heating and CSN 06 0310 – Central heating – designing and assembly.

Shall the boiler be connected to a sealed heating system, such system must have a pressure expansion vessel

of sufficient capacity (higher performance series boilers are not equipped with their own expansion vessel).

!!! We recommend:

 fill the system with soft water in line with CSN 07 7401;

 fit the boiler outlet with a bleeding device;

 mount a filter or a sludge device into the pump suction section;

 overflow valve should be installed in heating systems with thermostatic valves

I Have an EL15 and cannot see how to connect a 3 way motorised valve. Manual shows position on diagram but how is connection physically made? Please help Submitted on 28-9-2022 at 18:47
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Thermona THERM EL 15 Manual

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