Protherm Tiger 24 (12) KTZ Operating And Installation Manual - Hew Safety Valve
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HeW safety valve
The system safety valve is situated at the
bottom of the boiler on the left side of the
hydraulic group (Fig. 13). When the maxi-
mum pressure in the system is exceeded,
water or steam can be discharged through
the safety valve, therefore we recommend
the discharging the water into the buildin-
g’s waste water system.
Important:
Under no circumstances may
anyone manipulate with the safety valve
while the boiler is in operation.
HoW safety valve
Under the HoW tank near the draining val-
ve is located the HoW safety valve (Fig.
15). Due to possible exceeding of the max.
permitted pressure in the tank, we recom-
mend at you attach a hose to the safety
valve neck, (see HeW safety valve).
Connecting gas supply
The Tiger 24 (12) KTZ a 24 (12) KOZ
– natural gas boilers are designed to be
fuelled by natural gas of nominal pressu-
re in the gas mains 2 kPa, for which the
calorific value is most commonly stated to
be within the range of 9 and 10 kWh/m3.
Indoor gas distribution pipes and a gas
meter must be rated adequately, taking
into account also the user’s other gas ap-
pliances.
All gas distribution pipes in the building
must be installed in accordance with STN
EN 1775.
If the propane supply pipe to the boiler
is located underground, the area of the
supply must be sufficiently ventilated or
equipped with a valve that will close the
underground section whenever the boiler
is not burning. The valve must also close
the supply when the ventilation fails, i.e.
defect of forced ventilation or when natu-
ral ventilation is monitored by a detector
(warning signal from the detector).
Important:
The boiler end-piece for con-
nection of gas is a direct piece of the gas
valve with a ½” thread and a technological
flat surface. This technological flat surfa-
ce does not allow classical sealing of the
thread using threading and sealant, e.g.
hemp, teflon, paste, etc. The joint must be
sealed only by tightening a nut over the
pipe face with a corresponding seal (size
18 × 10 × 2).
After completing the gas supply connecti-
on to the boiler, the coupling must be tho-
roughly checked for potential gas leaks.
Topping the boiler water up
The procedure of topping up water in the
boiler is described in section “Operating
Guide – Service/Maintenance” on page 13.
Filling the heating system with
water
• check that the gas supply to the boiler is
closed
• loosen the cap on the automatic bleeding
valve located on the pump
• check and set the pressure in the expan-
sion valve according to the prescribed static
pressure in the system
• connect the boiler to the power supply
• switch the main switch to position “I” (Fig.
1), within about 20 seconds
Fig. 13