Immergas HERCULES SOLAR 26 1A User manual

HERCULES
SOLAR 26 1A
Ecological floor-standing
condensing boiler
with stainless steel storage tank
integrate with solar circuit
HERCULES SOLAR 26 1 A

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STHSC ed 0710 HERCULES Solar 26 1A
Technical Documentation Technical Documentation
HERCULES SOLAR 26 1A
Ecological oor-standing condensing
boiler with 200 litre storage tank
integrated with solar circuit
HERCULES Solar 26 1A
HERCULES Solar 26 1A combines the advantages of an
ecological condensing boiler with those of a oor standing
boiler with storage tank with heat output of 23.9 kW (20,554
kcal/h) and are equipped with a total premix combustion
system, which guarantees particularly low pollutant emissions
and allows functioning with methane or LPG. anks to
condensation technology, it is characterised for its high
eciency and for the large modulating eld (from 20÷100%
of the nominal heat output). e hydraulic circuit, made up
from one stainless steel water-gas coil exchanger, a hydraulic
manifold inserted as per standard and two pumps, means
that the boiler is suitable for the heating systems that require
high ow rate.
HERCULES Solar 26 1A can function in zone systems
controlled by pumps: it is, in fact, prepared to house the low
energy consumption pumps necessary to control up to 3 zones
on the heating system inside the casing. It is also prepared
for the realisation of mixed systems: one high temperature
zone (e.g. radiators) and two low temperature zones (e.g. oor
radiating panels) by inserting the optional kit inside the casing
(including pumps, mixer valves and zone management board).
e new zone management board allows to use the Remote
Control (optional) to control that considered to be the main
zone.
All hydraulic components of the solar circuit, solar
expansion vessel, solar safety valve, pump unit, thermostatic
mixing valve, etc... (except the solar collector) are integrated
General features inside the boiler casing. e P.C.B. also allows the control
of all solar heat circuit parameters, avoiding the use of a
dedicated control unit.
e new electronics allow the connection of the appliance
to the Comando Amico Remoto remote control and to the
Super Comando Amico Remoto remote control; both allow
to manage and control the boiler at a distance with great
ease. Using the Super CAR remote control it is possible to
indierently vary some settings from the boiler control panel
and from the Super CAR remote control panel, such as:
selection of Summer Winter, DHW set point, DHW comfort
status, Reset. e adjustment and the control of the appliance
are entrusted to a P.C.B. with continuous ame modulation.
e boiler functioning parameters are set using the buttons
and knobs while display of the status, functioning mode and
anomalies takes place on the back-lit digital display.
e DHW circuit is equipped with an 8 litre expansion vessel
and a 200 litre stainless steel storage tank which, as well as the
advantages of storage, guarantees the instantaneous production
of hot water. HERCULES Solar 26 1A must be installed using
the intake/exhaust kits or the ducting systems (Ø 60 mm rigid,
Ø 80 mm rigid and Ø 80 mm exible) realised in plastic and
designed expressly for Immergas condensing boilers.

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STHSC ed 0710 HERCULES Solar 26 1A
Technical DocumentationTechnical Documentation
Main dimensions and connections
HERCULES Solar 26 1A
Key:
RA3 - Zone 3 high temperature system return G 3/4”
(optional)
MA3 - Zone 3 high temperature system ow G 3/4”
(optional)
RA2 - Zone 2 high temperature system return G 3/4”
(optional)
MA2 - Zone 2 high temperature system ow G 3/4”
(optional)
RB2 - Zone 2 low temperature system return G 1”
(optional)
MB2 - Zone 2 low temperature system ow G 1”
(optional)
RB1 - Zone 1 low temperature system return G 1”
(optional)
MB1 - Zone 1 low temperature system ow G 1”
(optional)
RA1 - Zone 1 high temperature system return G 3/4”
MA1 - Zone 1 high temperature system ow G 3/4”
G - Gas supply G 1/2”
AC - DHW output G 3/4”
AF - DHW inlet G 3/4”
RC - Recirculation G 1/2” (optional)
RP - G 3/4” solar panels return (optional)
MP - Flow from G 3/4” solar panels (optional)
SC - Condensate drain (minimum internal
diameter Ø 13 mm)

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HERCULES Solar 26 1A control panel
Key:
- Stand-by - On Button
A - Summer ( ) and winter ( ) functioning mode selection button
B - “COMFORT”( ) or “SAVING” DHW function button
C - (RESET)/menu exit (ESC) reset button
D - Menu entry button (MENU)/ data conrmation (OK)
1 - Domestic hot water temperature selector switch
2 - Domestic hot water temperature set
3 - Central heating water temperature selector switch
4 - Central heating temperature set
5 - Anomaly presence
6 - Display of boiler functioning status
8 - Flame presence symbol and relative power scale
9 and 7 - Primary heat exchanger output water temperature
10 - Boiler in Stand-by
11 - Boiler connected to remote control (Optional)
12 - Functioning in summer mode
13 - Anti-freeze function in progress.
14 - Functioning in winter mode
15 - DHW functioning in “COMFORT” mode
16 - Connection to external tools for technician
17 - Display of menu items
18 - Functioning with external temperature probe active
19 - Display of data conrmation or menu access
20 and 7 External temperature display
with external probe connected (optional)
21 - Display of reset or exit menu request
22 - Chimney sweep function in progress
23 - Boiler manometer
24 - Multifunction display

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HERCULES Solar 26 1A main components
Key:
1 - Stainless steel storage tank
2 - DHW recirculation pump (optional)
3 - 3-way valve (motorised)
4 - Zone 1 by-pass
5 - Zone 1 one-way valve
6 - Zone 1 pump
7 - Safety thermostat (Low temperature)
(optional)
8 - Flow probe (Low temperature)
(optional)
9 - Zone 2 pump (optional)
10 - Zone 2 one-way valve (optional)
11 - Zone 2 by-pass (optional)
12 - Mixing valve (optional)
13 - Solar expansion vessel
14 - Flue safety thermostat
15 - Burner
16 - Ignition electrode
17 - Detection electrode
18 - Venturi
19 - Gas nozzle
20 - Fan
21 - Manual air vent valve
22 - Domestic water inlet cock
23 - 8 bar safety valve
24 - Air intake pipe
25 - Safety valve with manometer
26 - 3 bar safety valve
27 - DHW mixing valve
28 - System lling valve
29 - Shut-o valve with thermometer
30 - Solar pump
31 - Flow meter
32 - Domestic hot water probe
33 - Condensate drain trap
34 - Polyphosphate dispenser (optional)
35 - Domestic hot water expansion vessel
36 - Solar system drain tting
37 - Storage tank emptying cock
38 - Sample points (air A) - (ue gases F)
39 - Positive signal pressure point
40 - Negative signal pressure point
41 - Manual air vent valve
42 - Air vent valve
43 - Zones management electrical
connection box (optional)
44 - Condensation module
45 - Hydraulic manifold
46 - System expansion vessel
47 - Flow probe
48 - Safety thermostat
49 - Collector draining valve
50 - System pressure switch (absolute)
51 - Boiler Pump
52 - Sealed chamber
53 - Gas valve
54 - System draining valve
55 - Magnesium anode
56 - Storage tank solar probe

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HERCULES Solar 26 1A wiring diagram
e hot water used for central heating and domestic hot water
is produced via a primary and a secondary circuit (DHW)
which are aected according to necessity.
Standard Conguration
Key:
1 - Storage tank emptying cock
2 - Magnesium anode
3 - Domestic hot water expansion vessel
4 - Domestic hot water probe
5 - Stainless steel coil for storage tank
6 - System draining valve
7 - Polyphosphate dispenser (optional)
8 - System lling valve
9 - 3 bar safety valve
10 - Collector draining valve
11 - Condensate drain trap
12 - Gas valve
13 - Gas valve outlet pressure point (P3)
14 - Air intake pipe
15 - Fan
16 - Gas nozzle
17 - Detection electrode
18 - Burner
19 - Flue safety thermostat
20 - Condensation module lids
21 - Condensation module
22 - Manual air vent valve
23 - Flue hood
24 - Air sample point
25 - Flue sample point
26 - Pressure point ΔP gas
27 - Flow probe
28 - Safety thermostat
29 - Ignition electrode
30 - Boiler Pump
31 - System pressure switch (absolute)
32 - 3-way valve (motorised)
33 - Venturi positive sign P1
34 - Venturi negative sign P2
35 - Air/gas Venturi manifold
36 - System expansion vessel
37 - Air vent valve
38 - Hydraulic manifold
39 - Zone 1 pump
40 - Zone 1 one-way valve
41 - Zone 1 by-pass
42 - Mixing valve lter
43 - DHW mixing valve
44 - Domestic water inlet cock
45 - Cold inlet lter
46 - Flow limiter
47 - Cold water inlet non-return valve
48 - 8 bar safety valve
49 - DHW recirculation pump
(optional)
50 - Solar stainless steel coil
51 - Solar expansion vessel
52 - Manual air vent valve
53 - Shut-o valve with thermometer
54 - Safety valve with manometer
55 - One-way valve (OV 20)
56 - Solar pump
57 - Flow meter
58 - One-way valve (OV 15)
RA1 - Zone 1 system return
(High temperature)
MA1- Zone 1 system ow
(High temperature)
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic cold water inlet
RC - Domestic hot water re-circ.
RP - Return from solar panels
MP - Flow from solar panels
SC - Condensate drain

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Technical DocumentationTechnical Documentation
Primary circuit (boiler circuit)
e primary circuit, with relative control and safety devices,
is started every time there is a central heating or domestic
hot water request.
Functioning (see hydraulic drawing)
e heat contained in the combustion products is absorbed
by the pipes of the water-gas primary heat exchanger with coil
inserted in the condensation module (17) which, then gives
the heat up to the water made to circulate inside the boiler
pump (26).
e water is introduced directly into the hydraulic manifold
(34) and therefore to the system or can be diverted inside the
storage tank coil (1).
is depends on the position of the motorised 3-way valve
(28), which depending on request, allows ow towards the
system ow and return pipes of the hydraulic manifold (34)
or causes diversion towards the coil (1).
Boiler pump (1)
Operates on the primary circuit return immediately after the
3-way valve to which it is connected. It is part of the integrated
multifunction unit realised in composite material.
ere is a seat on the body where the automatic air vent valve
(2) is housed.
1
2

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2
1
4
3
5
Primary heat exchanger
(condensation module)
It is formed from a casing that contains 4 elements with a
coil shape.
Each element is made up from 5 elliptical spirals (3).
e entire module is realised in stainless steel and its internal
part makes up the sealed combustion chamber and the
condensation chamber (2).
e rst three elements are aected directly by the action of
the cylindrical burner applied to the front, while the fourth
is arranged in the condensation chamber, which is separated
from the combustion chamber by sheet steel (see ue circuit).
To reduce head losses to a minimum and increase the ow rate
available to the system, the ow is made up from the parallel
connection of the rst two elements, the return, instead is
made up from the parallel connection of the last two elements.
e heat exchanger inlet is connected to the pump ow and the
outlet, on which the NTC central heating probe is positioned
(1), is connected to the primary circuit ow.
e primary circuit return and ow pipes are coupled using
threaded ttings with at gasket.
e ue hood (4) is connected to the rear using a relevant
gasket blocked by a metal ring and xed using three nuts to
the steel condensation module.
e condensate drain is also found in the lower part.
To ease the escape of any air bubbles still present in the coils,
there is a manual air vent in the upper part of the module (5).
FLUE GAS
RETURN
FLOW
EXHAUST
CONDENSATE

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Motorised 3-way valve
It is an electric 3-way valve operating on the primary circuit
return that allows, according to request (DHW or CH) , to
introduce boiler water into the CH system or the storage
tank coil.
is depends on the position of the shutter (5) which, closes the
passage towards the system opening it at the same time towards
the storage tank (DHW position) or vice versa (CH position).
e shutter (5) is moved into both positions by powering the
motor (1).
e hydraulic part is made up from a group of composite
material (2) that also integrates the pump and is put into
action thanks to a motor (1) that causes movement according
to necessity.
Operation.
When it is necessary to reach the CH or DHW position, the
motor (1) is activated by the P.C.B.
Functioning of the motor leads to the movement of the shutter
(5) and compresses (CH position) or leaves (DHW position) the
shutter contrast spring to release (4).
Both the spring (4) and the shutter (5) are situated inside the
3-way cartridge (3).
e hydraulic arrival at the requested position, alternatively
causes the opening and closure of one of the two end run micro
switches (6) set-up inside the motor box (1).
is allows to remove voltage to the motor blocking it in the
position reached and to enable motor functioning only in the
presence of a dierent request (DHW or CH signal).
RETURN
PUMP
RETURN
COIL
RETURN
MANIFOLD
RETURN
4
1
2
3
5
Flow
Pump
Return
coil
storage tank
Return
manifold
hydraulic