1-26
1-25
19
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
Storage tank unit disassembly.
To disassemble
the storage tank unit, empty the boiler system
by acting on the relevant drain fitting. Before
carrying out this operation, ensure the filling
valve is closed. Close the cold water inlet valve
and open any domestic hot water cock. Loosen
the nuts on the system flow and return pipes (3)
and the cold inlet and hot outlet nuts present
on the storage tank unit (1). Loosen the bracket
fixing screws (2) Remove the screws (4) with the
relative retainer brackets and slide the cylinder
outwards on the relevant guides. Work in reverse
order to assemble the storage tank unit.
N.B.:
have the efficiency of the storage tank Mag-
nesium Anode checked annually by a qualified
firm. The storage tank unit is prepared for intro-
duction of the domestic hot water pump fitting.
1.25 KITS AVAILABLE ON REQUEST.
• Recirculation kit (on request). The boiler
storage tank unit is prepared for application
of the pump kit. Immergas supplies a series of
fittings and attachments that allow connection
between the storage tank unit and domestic hot
water system. The pump probe fitting is already
inserted on the storage unit kit and the indica-
tion of the pump kit attachment is envisioned
on the installation template.
• System cut-off valves kit (on request). The
boiler is designed for installation of system
interception cocks to be placed on flow and
return pipes of the connection assembly. This
kit is particularly useful for maintenance as
it allows the boiler to be drained separately
without having to empty the entire system.
• Polyphosphate dispenser kit (on request). The
polyphosphate dispenser reduces the forma-
tion of lime-scale and preserves the original
heat exchange and domestic hot water pro-
duction conditions. The boiler is prepared for
application of the polyphosphate dispenser kit.
• Zone pumps kit (on request). If the central
heating system is to be divided into several
zones (
max. three
) in order to interlock them
with separate adjustments and to keep water
flow rate high for each zone, Immergas supplies
zone pump kits on request.
• Low temperature kit (on request). If the central
heating system is to be divided into high tem-
perature zones (radiators) and low temperature
zones (floor plants) in order to interlock them
with separate adjustments and to keep water
flow rate high for each zone, Immergas supplies
the low temperature kit on request.
• Solar panels kit (on demand). If solar panels
are to be used for the production of domestic
hot water, Immergas supplies the solar panels
kit on demand.
• Low temperature safety thermostat kit. With
the boiler functioning in direct low tempera-
ture (no control downstream from the boiler),
to prevent problems to the low temperature
system a safety thermostat must be inserted
onto the flow pipe.
The above-mentioned kits are supplied complete
with instructions for assembly and use.
1.24 DOMESTIC HOT WATER STORAGE
TANK UNIT.
The “Hercules Condensing ErP” boiler is the
accumulation type with a capacity of 120 litres.
It contains large coiled stainless steel heat ex-
changer pipes, which allow to notably reduce
hot water production times. These storage tank
units constructed with stainless steel casing and
bottoms, guarantee long duration through time.
The assembly concepts and welding (T.I.G.) are
implemented to the minimum detail to ensure
maximum reliability.
The upper inspection flange ensures practical
control of the storage tank unit and the coiled
heat exchanger and easy internal cleaning.
The domestic hot water connections are placed
on the flange cover (cold inlet and hot outlet)
along with the Magnesium Anode support cap
including the same, supplied as standard for
internal protection of the storage tank unit from
possible corrosion.
Circulating pump
LED
Description
Diagnostics
Remedy
LED steady on
Pump
noisy
Insufficient system pressure, circulating pump
in cavitation
Restore correct thermal circuit pressure
Presence of foreign matter in the impeller
Remove the motor and clean the impeller
Flashing white LED
Noises during cir-
culation of the heat
transfer fluid
Presence of air in the system
Vent the system
LED steady on
Flow rate too high
Reduce rotation speed
LED off
The circulator does
not work
Power outage
Ensure the boiler is correctly powered, ensure
the circulator is correctly powered
Faulty circulating pump
Replace the circulating pump
Red LED
Rotor seized
Remove the motor and clean the impeller
Insufficient power supply voltage
Check boiler power supply voltage
System draining valve
Storage tank draining valve
