Bedienungsanleitung Unical EVE 05 CTFS 24 (Seite 28 von 36) (Englisch)

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Installation info

Example: At 25°C, the nominal resistance is 10067 Ohm

At 90°C, the nominal resistance is 920 Ohm

Relation between the temperature (°C) and nominal resistance

(Ohm) of the heating sensor SR and D.H.W. sensor SS

TABLE OF RESISTANCE VALUES AS A FUNCTION OF THE TEMPERATURE

OF THE HEATING SENSOR (SR) AND D.H.W. SENSOR (SS) with a nominal resistance of ten kOhm

T°C0123456789

0 32755 31137 29607 28161 26795 25502 24278 23121 22025 20987

10 20003 19072 18189 17351 16557 15803 15088 14410 13765 13153

20 12571 12019 11493 10994 10519 10067 9636 9227 8837 8466

30 8112 7775 7454 7147 6855 6577 6311 6057 5815 5584

40 5363 5152 4951 4758 4574 4398 4230 4069 3915 3768

50 3627 3491 3362 3238 3119 3006 2897 2792 2692 2596

60 2504 2415 2330 2249 2171 2096 2023 1954 1888 1824

70 1762 1703 1646 1592 1539 1488 1440 1393 1348 1304

80 1263 1222 1183 1146 1110 1075 1042 1010 979 949

90 920 892 865 839 814 790 766 744 722 701

2.5 - STARTING THE

BOILER

PRELIMINARY CHECKS

Before starting the boiler check that:

- the boiler installation has been made in

accordance with all the applicable regu-

lations concerning water and gas instal-

lation, smoke evacuation and electrical

installation

- the flue gas exhaust duct and its terminal

are installed correctly: when the boiler

FILLING TAP

is switched on there must be no le-

akage of any combustion products

from any seals;

- the supply voltage of the boiler is 230 V-

50 Hz;

- the system is correctly filled with water

(pressure at the gauge 0.8/1 bar);

- any gate valves taps of the system are

open;

- the mains gas corresponds to that with

which the boiler has been calibrated:

otherwise, convert the boiler to use the

gas available (see section: “MODIFICA-

TION FOR OTHER GASES “): this ope-

ration must be performed by quali-

fied technicians;

- the gas supply tap is open;

- there are no gas leaks;

- the external mains switch is on;

- the boiler’s safety valve is not locked;

- there are no water leaks.

SWITCHING ON AND OFF

To switch on and off the boiler follow the

indications in the “Users’ Instructions”.

Filling position

fig. 26

Normal posi-

tion

FILLING TAP

2.4 -FILLING THE

SYSTEM

After completing all the connections of the

system the heating circuit can be filled.

This filling operation must be performed with

care as follows:

- open the air vents of the radiators and

check that the automatic air vent in the

boiler is works properly;

- gradually open the water tap and check

operation of any automatic air vents in-

stalled in the system;

- close the air vents on the radiators as

soon as water comes out;

- use the pressure gauge on the boiler to

check that the pressure has reached the

value of 0.8/1bar;

- close the water inlet tap and then release

the air again through the radiator air ven-

ts;

- after switching on the boiler and after the

system has reached the correct tempe-

rature, stop the pump and repeat the air

relief operations;

- let the system cool down and then adjust

the water pressure to 0.8/1 bar.

WARNING

NB: After a given period of

inactivity and without electri-

cal supply the pump could be

blocked.

Before switching on the boiler it is important

to restart the pump as follows: loosen the

protection screw in the centre of the pump

motor, insert a screwdriver in the hole and

then manually rotate the pump shaft

clockwise.

Once the pump has been restarted tighten

the protection screw and check that there

are no water leaks.

WARNING

Once the protection screw has been remo-

ved a little water may leak out. Before repla-

cing the casing of the boiler dry any wet

surfaces.

The minimum water pressure switch does

not give electrical impulse to the burner to

ignite when the pressure is lower than 0.4

bar. The pressure of the water in the C.H.

system must not be lower than 0.8/1bar; if

this value is lower use the water filling tap on

the boiler to adjust the pressure.

This must be performed when the system is

cold. Use the pressure gauge on the boiler

to read the pressure value of the circuit.

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Unical EVE 05 CTFS 24 Seite 28

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