Boiler Start Up (Ignition); Dhw Mixing Valve; Circulation Pump - Immergas HERCULES SOLAR 26 2 ErP Instruction And Recommendation Booklet

10 Switch the solar pump on at a maximum
speed and make it run for at least 15 minutes.
11 Disconnect the filling pump and close the
fittings using the relevant screw caps.
12 Open the ball valve above the pump com-
pletely.
Do not fill the system in conditions with strong
insolation and with the manifolds at high
temperatures.
Make sure that all air bubbles have been com-
pletely eliminated.
Solar circuit vent.
Any air present in the system must be bled:
- on start-up (after filling);
- if necessary, e.g. in the case of breakdown.
Attention: danger of burns from the liquid
contained in the collectors.

1.25 BOILER START UP (IGNITION).

In order to issue the Declaration of Conformity
required by the laws in force, one must fulfil
the following requirements to commission the
boiler (the operations listed below must only
be performed by qualified personnel and in the
presence of professionals only):
- check that the internal system is properly sealed
according to the specifications set forth by
technical regulations in force;
- make sure that the type of gas used corresponds
to boiler settings;
- Check that there are external factors that may
cause the formation of fuel pockets;
- switch the boiler on and check correct ignition;
- make sure that the gas flow rate and relevant
pressure values comply with those given in the
manual (Par. 3.17);
- ensure that the safety device intervenes in the
event of gas supply failure and check the relative
intervention time;
- check the intervention of the main switch
located upstream from the boiler and in the
boiler;
- check that the intake/exhaust concentric ter-
minal (if fitted) is not blocked.
The boiler must not be started up even if only
one of the checks should be negative.
N.B.: only upon completing commissioning by
an installer, may an authorised firm carry out an
initial inspection of the boiler, which is required to
activate the Immergas warranty. The test certificate
and warranty is issued to the user.

1.26 DHW MIXING VALVE.

The thermostatic mixing valve mixes the cold
water with the hot water and via an internal wax
element, sensitive to the temperature, automati-
cally controls the temperature of the mixed water
set by the user.
N.B.: for excellent management of the tempera-
tures, the mixing valve must be set by the installer
at a safety temperature required by the user. The
outlet temperature of the domestic hot water
can also depend on the value set on the boiler,
however, the upper limit temperature value of
the domestic hot water is always determined by
the position of the mixing valve: knob position 1
= 42°C, 2 = 48°C, 3 = 54°C, 4 = 60°C (standard)
(the values indicated refer to a storage tank with
water at 70°C).
Any release of the three-way mixing valve. If
after a long period of inactivity the three-way
mixing valve is blocked, it is necessary to act
manually on the knob positioned on the top of
the same in a way to release the shutter of the
valve itself.

1.27 CIRCULATION PUMP.

Boilers in the "Hercules Condensing ErP" series
are supplied with 2 types of circulating pumps.
Set operation modes according to one's installa-
tion requirements.
• Boiler circulator pump. The circulating pump
is not equipped with speed selector. To change
operation mode, parameter "Pump sp. " in the
"Configurations" boiler menu must be changed.
Pump release. If the pump should be blocked
after a long period of inactivity, it must be re-
leased. Loosen the front cap, making sure that
the liquid that escapes cannot cause injury/
damage to persons/objects and turn the mo-
tor shaft very carefully using a screwdriver so
as not to damage the latter. Once the pump is
released, close the vent cap.
• Zone 1 circulator pump. The pump is ideal for
the requirements of each central heating system
in a domestic and residential environment.
In fact, the pump is equipped with electronic
control that allows to set advanced functions.
Adjustments. Turn the selector and set it on
the desired curve to adjust the circulator pump.
Program
P 1 lower (ΔP-V)
P 2 upper (ΔP-V)
C 3 lower (ΔP-C) - H=3 m
C 4 upper (ΔP-C) - H=4 m
Min - Max
Program P (1 lower 2 upper) (ΔP-V) - Pro-
portional curve (green LED). This allows
the pressure level (head) to be proportionally
reduced as the system heat demand decreases
(flow rate reduction). Thanks to this func-
tion, the electric power consumption of the
circulator pump is reduced further: the energy
(power) used by the pump decreases according
to the pressure level and flow rate. With this
setting, the pump guarantees optimal perfor-
mance in most heating systems, thereby being
19
particularly suitable in single-pipe and two-
pipe installations. Any noise of the water flow
in the pipes, valves and radiators is eliminated
by reducing the head. Optimal conditions for
thermal comfort and acoustic well-being.
Programs C (3 lower 4 upper) (ΔP-C) - Con-
stant curve (orange LED). The circulator
pump maintains the pressure level (head)
constant as the system heat demand decreases
(flow rate reduction). With these settings, the
circulator pump is suitable for all floor systems
where all the circuits must be balanced for the
same drop in head.
MIN-MAX Program (Blue LED). The pump
is distinguished by adjustable operating curves
by positioning the selector in any point between
the Min and Max positions, thereby satisfying
any installation requirement (from a simple
single-pipe to more modern and sophisticated
systems) and always guarantee optimum per-
formance. The precise working point can be
selected in the entire field of use by gradually
adjusting the speed.
Real time diagnostics: a lit LED (in various
colours) provides information regarding the
pump operating status, see fig. 1-25
Possible pump release. The pump block is
indicated by a fixed red LED switching on. Turn
the selector up to the MAX position, discon-
nect and reconnect the power to restart the
automatic release process. The pump will then
activate the procedure that will last a maximum
of 15 minutes and the LED will flash upon each
restart. It then turns blue for a few seconds and
goes back to red if the attempt to restart is not
successful. Once the process is complete, set
the selector back to the desired curve and if
the problem has not bee resolved, perform the
manual release procedure as described below.
- Disconnect the power to the boiler (the LED
switches off).
- Close the system flow and return and let the
pump cool down.
- Empty the system circuit via the relative cock.
- Remove the motor and clean the impeller.
- Once unblocked, remount the motor.
- Fill the primary circuit; restore boiler power
and set the desired curve.
Attention: there is a burns hazard due to high
LED
fluid temperature and pressure. Burns hazard
from coming in contact.
green
orange
blue