Ferroli BlueHelix HiTech RRT C User manual

INSTRUCTIONS FOR USE, INSTALLATION AND MAINTENANCE

296 EN
B
The CE marking certifies that the products meet the essential requirements of the rele-
vant directives in force.
The declaration of conformity may be requested from the manufacturer.
cod. 3541V300 - Rev. 02 - 03/2021
 Read the warnings in this in-
struction booklet carefully
since they provide important
information on safe installa-
tion, use and maintenance.
 This instruction booklet is an
integral and essential part of
the product and must be kept
with care by the user for future
reference.
 If the unit is sold or transferred
to another owner or if it is to be
moved, always make sure the
booklet stays with the boiler so
that it can be consulted by the
new owner and/or installer.
 Installation and maintenance
must be carried out by profes-
sionally qualified personnel,
according to current regula-
tions and the manufacturer's
instructions.
 Incorrect installation or inade-
quate maintenance can result
in damage or injury. The man-
ufacturer declines any liability
for damage caused by errors
in installation and use or by
failure to follow the instructions
provided.
 Before carrying out any clean-
ing or maintenance operation,
disconnect the unit from the
power supply using the system
switch and/or the special cut-
off devices.
 In case of a fault and/or poor
operation, deactivate the unit
and do not try to repair it or di-
rectly intervene. Contact pro-
fessionally qualified
personnel. Any repair/replace-
ment of the products must only
be carried out by qualified per-

B
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EN cod. 3541V300 - Rev. 02 - 03/2021
sonnel using genuine parts.
Failure to comply with the
above can compromise the
safety of the unit.
 Periodic maintenance per-
formed by qualified personnel
is essential in order to ensure
proper operation of the unit.
 This unit must only be used for
its intended purpose. Any oth-
er use is deemed improper
and therefore hazardous.
 After unpacking, check the
good condition of the contents.
The packing materials are po-
tentially hazardous and must
not be left within the reach of
children.
 The unit can be used by chil-
dren aged at least 8 years and
by persons with reduced phys-
ical, sensory or mental capa-
bilities, or lacking experience
or the necessary knowledge,
only if under supervision or
they have received instruc-
tions on its safe use and the
related risks. Children must
not play with the unit. Cleaning
and maintenance intended to
be done by the user can be
carried out by children aged at
least 8 years only if under su-
pervision.
 In case of doubt, do not use
the unit. Contact the supplier.
 The unit and its accessories
must be appropriately dis-
posed of in compliance with
current regulations.
 The images given in this man-
ual are a simplified represen-
tation of the product. In this
representation there may be
slight and insignificant differ-
ences with respect to the prod-
uct supplied.

298
1 Operating instructions ........................................................................................................ 299
1.1 Introduction.........................................................................................................................................299
1.2 Control panel ......................................................................................................................................299
1.3 Connection to the power supply, switching on and off .......................................................................302
1.4 Adjustments........................................................................................................................................ 305
2 Installation ............................................................................................................................ 315
2.1 General Instructions ...........................................................................................................................315
2.2 Place of installation ............................................................................................................................315
2.3 Plumbing connections ........................................................................................................................ 315
2.4 Gas connection ..................................................................................................................................317
2.5 Electrical connections.........................................................................................................................317
2.6 Fume ducts.........................................................................................................................................320
2.7 Condensate drain connection............................................................................................................. 326
3 Service and maintenance.................................................................................................... 327
3.1 Adjustments........................................................................................................................................ 327
3.2 Commissioning...................................................................................................................................333
3.3 Maintenance.......................................................................................................................................334
3.4 Troubleshooting..................................................................................................................................342
4 Technical data and characteristics .................................................................................... 346
4.1 Dimensions and connections ............................................................................................................. 346
4.2 General view ......................................................................................................................................347
4.3 Hydraulic circuit ..................................................................................................................................347
4.4 Technical data table ...........................................................................................................................348
4.5 Diagrams ............................................................................................................................................352
4.6 Wiring diagram ...................................................................................................................................353

299
EN cod. 3541V300 - Rev. 02 - 03/2021
1. Operating instructions
1.1 Introduction
Dear Customer,
BlueHelix HiTech RRT C is a high-efficiency, low emissions premix condensing heat generator
with heat exchanger in s/steel and incorporated DHW production, using Natural Gas (G20), Liq-
uefied Gas (G30-G31) or Propane-Air (G230) and equipped with a microprocessor control sys-
tem.
The sealed chamber unit is suitable for indoor installation or outdoors in a partially protected
place (according to EN 15502) with temperatures to -5°C.
1.2 Control panel
fig. 1- Control panel
Panel legend fig. 1
1DHW temperature setting decrease
button
2DHW temperature setting increase but-
ton
3Heating system temperature setting de-
crease button
4Heating system temperature setting in-
crease button
5Display
6Return button
7Winter, Summer, Unit OFF, ECO,
COMFORT mode selection button
8Eco mode ( )
9DHW mode
10 Summer/Winter mode
11 Menu / confirm button
12 System pressure
13 Heating mode
14 Burner lit

300 EN
cod. 3541V300 - Rev. 02 - 03/2021
Indication during operation
Heating
A heating request (generated by the Room
Thermostat or Remote Timer Control) is in-
dicated by the flashing radiator symbol.
When the burner is lit, the flame symbol ap-
pears and the 3 levels indicate the actual in-
tensity.
fig. 2
DHW (domestic hot water)
A DHW request (generated by hot water
draw-off) is indicated by the flashing faucet
icon.
When the burner is lit, the flame symbol ap-
pears and the 3 levels indicate the actual in-
tensity.
fig. 3
Comfort
In Comfort mode (restoration of boiler internal temperature) the flame symbol appears while the
faucet flashes.

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EN cod. 3541V300 - Rev. 02 - 03/2021
Frost protection
In frost protection mode (flow temperature below 5°C) the flame symbol appears.
Fault
In case of a fault, the display shows the fault code with different graphics depending on the type.
A-type fault (fig. 5): For this fault manual intervention is required by pressing the button for
about 2 seconds. Then confirm with the button .
F-type fault (fig. 4): A fault which will be automatically reset after the problem has been eliminat-
ed.
Message-type fault (fig. 6): The fault is such as not to compromise boiler operation. The mes-
sage disappears when the problem is eliminated.
fig. 4 fig. 5 fig. 6

302 EN
cod. 3541V300 - Rev. 02 - 03/2021
1.3 Connection to the power supply, switching on and off
Boiler not electrically powered
BTo avoid damage caused by freezing during long idle peri-
ods in winter, it is advisable to drain all the water from the
boiler.
Boiler electrically powered
Electrically power to the boiler.
During the first 5 seconds the display shows the software version of the board and display (fig. 7).
For the following 20 seconds the display will show FH which identifies the heating system air vent-
ing cycle with the fan running (fig. 8).
In the next 280 seconds, the venting cycle continues with the fan off (fig. 9).
Open the gas valve ahead of the boiler
When the message Fh disappears, the boiler is ready to operate automatically whenever hot wa-
ter is drawn or in case of a room thermostat request
fig. 7- Switching on / Software version fig. 8- Vent with fan on fig. 9- Vent with fan off

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EN cod. 3541V300 - Rev. 02 - 03/2021
To interrupt the venting phase (FH or Fh), keep the button pressed for about 2 seconds until
the symbol appears on the display. Confirm by pressing the button .
fig. 10

304 EN
cod. 3541V300 - Rev. 02 - 03/2021
Turning the boiler off and on
Changing from one mode to another is possible by repeatedly pressing the button , following
the sequence shown in fig. 11.
A =Summer mode - B = Winter mode - C = Off mode
To turn the boiler off, repeatedly press the button until detail C of fig. 11 is displayed.
fig. 11- Turning the boiler off
When the boiler is turned off, the PCB is still powered. DHW and heating are disabled. The frost
protection system remains on. To relight the boiler, press the button .
The boiler will be immediately ready in Winter and DHW mode.
BThe frost protection system does not work when the power
and/or gas to the unit are turned off. To avoid damage
caused by freezing during long shutdowns in winter, it is
advisable to drain all water from the boiler, the DHW circuit
and the heating system water; or drain just the DHW cir-
cuit and add a suitable antifreeze to the heating system,
as prescribed in sec. 2.3.

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EN cod. 3541V300 - Rev. 02 - 03/2021
1.4 Adjustments
Winter/summer switchover
Repeatedly press the button until the summer symbol (sun) appears, with the word "OFF" for
heating (detail 10 - fig. 1): the boiler will only deliver hot water. The frost protection system remains
on.
To reactivate the winter mode, repeatedly press the button until the snowflake appears.
fig. 12- Summer fig. 13- Winter
Heating temperature adjustment
Use the heating buttons (details 3 and 4 -
fig. 1) to adjust the temperature from a mini-
mum of 20°C to a maximum of 80°C. The
maximum value can be changed inside the
parameters menu [TSP] via parameter
P40.
fig. 14
DHW temperature adjustment
Use the DHW buttons (details 1 and 2 -
fig. 1) to adjust the temperature from a mini-
mum of 40°C to a maximum of 55°C. The
maximum value can be changed inside the
parameters menu [TSP] via parameter
P46.
fig. 15
BIf little water is drawn and/or with a high water inlet
temperature, the DHW outlet temperature may differ
from the set temperature.

306 EN
cod. 3541V300 - Rev. 02 - 03/2021
Room temperature adjustment (with optional room thermostat)
Using the room thermostat, set the temperature required in the rooms. If the room thermostat is
not installed, the boiler will keep the system at the set system delivery setpoint temperature.
Room temperature adjustment (with optional remote timer control)
Using the remote timer control, set the required temperature in the rooms. The boiler will adjust
the system water according to the required room temperature. For operation with remote timer
control, please refer to the relevant instruction manual.
ECO/COMFORT selection
The unit has a function that ensures fast hot water delivery and maximum comfort for the user.
When this function is active (COMFORT mode), the water in the boiler is kept at temperature, thus
giving the immediate availability of hot water from the boiler when the faucet is turned on, avoiding
waiting times.
The COMFORT function can be disabled by the user (ECO mode) by pressing the button for
2 seconds. In ECO mode the display activates the symbol (detail 12 - fig. 1). To activate COM-
FORT mode press the button again for 2 seconds; the symbol disappears.
Main menu [MENU]
Pressing the button displays the main menu of the boiler [MENU] shown in fig. 16.
The desired items can be selected with the buttons and heating.
To access the menus contained in the navigation menu [MENU], press the button after se-
lecting the desired item.
[Service] - Menu reserved for the installer
See Installer menu [SERVICE] on
page 307.
[Diagnostic] - Provides information on boil-
er status, in real time.
See Boiler information menu [Diagnos-
tic] on page 308.
[Counters] - Boiler counters.
See Boiler counters menu [Counters]
on page 309.
[Alarm] - Storage of last faults that oc-
curred in the boiler.
See Boiler faults menu [Alarm] on
page 310.
[Display] - For doing the display settings.
See Display adjustment menu [Display]
on page 311.
fig. 16- Main menu

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EN cod. 3541V300 - Rev. 02 - 03/2021
Installer menu [SERVICE]
After selecting the installer menu [Service], press the button . To continue, enter the pass-
word 1234. Use the buttons and DHW to set the cell value, and the buttons and
heating to shift position (fig. 17).
fig. 17- Password entry
Confirm with the button to access the installer menu[SERVICE] screen where the following
menus are available:
[TSP] - Menu for modifying transparent pa-
rameters
[TEST] - Activation of boiler Test mode.
[OTC] - Setting of climatic curves for adjust-
ment with external probe.
[Zone] - Settings of climatic curves of addi-
tional zones.
[Auto Setup] - This menu is used to acti-
vate calibration. Visible only with param-
eter b27 set to 5.
fig. 18

308 EN
cod. 3541V300 - Rev. 02 - 03/2021
Boiler information menu [Diagnostic]
This menu provides the information, in real time, of the various sensors present in the boiler.
To access it, press the button from the main screen, select the item [Diagnostic] and confirm
with the button .
fig. 19
Table 1- Description Boiler information menu [Diagnostic]
If the sensor is damaged, the display will show dashes (--).
To return to the main screen, repeatedly press the button or wait for automatic switching after
15 minutes.
Parameter displayed Description Range
[CH 1 temp] NTC Heating sensor (°C) 0 ÷ 125 °C
[CH 2 temp] NTC Return sensor (°C) 0 ÷ 125 °C
[DHW temp] NTC DHW sensor (°C) 0 ÷ 125 °C
[Ext temp] NTC External sensor (°C) +70 ÷ -30°C
[Fume temp] NTC Fume sensor (°C) 0 ÷ 125 °C
[Fan rpm] Actual fan rpm 00 ÷ 120 x 100 RPM
[Pump speed] Actual burner power (%) 00% = Min., 100% = Max.
[Power] Actual DHW draw-off (l/min/10) 00 ÷ 99 l/min/10
[DHW flow] Actual system water pressure (bar/10) 0.0 ÷ 9.9 bar
[Water Pressure] Actual modulating pump speed (%) 00 ÷ 100%
[Flame] Flame status -- ÷ 255

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Boiler counters menu [Counters]
The system counters are displayed in this menu:
[Burner]
Burner operation total hours.
[Ignition ok]
Number of successful ignitions
[Ignition error]
Number of failed ignitions.
[CH pump time]
Pump operation hours in heating.
[DHW pump time]
pump operation hours in DHW.
fig. 20

310 EN
cod. 3541V300 - Rev. 02 - 03/2021
Boiler faults menu [Alarm]
The card can store the last 10 faults. Alarm 1 represents the most recent fault that occurred.
The codes of the faults saved are also displayed in the relevant menu of the Remote Timer Con-
trol.
Press the buttons and Heating to scroll the list of faults. Cancel is the last item in the list
and which, once selected and confirmed with the button , allows all the faults history to be re-
set.
To exit the Boiler faults menu [ALARM], press the button repeatedly until reaching the main
screen or wait for automatic exit after 15 minutes.
fig. 21

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Display adjustment menu [Display]
In this menu it is possible to set some dis-
play parameters.
[Contrast]
Contrast adjustment.
[Brightness]
Brightness adjustment
[Backlight time]
Display backlight duration.
[Reset]
Restore factory values.
fig. 22
Sliding Temperature
When the external probe (optional) is installed, the boiler adjustment system works with "Sliding
Temperature". In this mode, the heating system temperature is regulated according to weather
conditions, to ensure high comfort and energy efficiency throughout the year. In particular, as the
outside temperature increases the system flow temperature decreases according to a specific
"compensation curve".
With "Sliding Temperature", the temperature set using the heating buttons (details 3 and 4 -
fig. 1) becomes the maximum system flow temperature. It is advisable to set a maximum value to
allow system adjustment throughout its useful operating range.
The boiler must be adjusted at the time of installation by qualified personnel. However, the user
can make any further adjustments necessary to optimize comfort levels.
Compensation curve and curve offset
From the main screen, press the button to access the navigation menu [MENU]. Using the
buttons and heating select the installer menu [SERVICE] and confirm with the button .
Enter the password (see Installer menu [SERVICE] on page 307 ) and press the button .
Using the buttons and heating select the menu Climatic curves setting [OTC] and con-
firm by pressing the button .

312 EN
cod. 3541V300 - Rev. 02 - 03/2021
Curve: select this item and use the buttons
and DHW to adjust the de-
sired curve from 1 to 10.
By adjusting the curve to 0, the slid-
ing temperature adjustment is disa-
bled (see fig. 24).
Offset: Access this sub-menu to access par-
allel offset of the curves using the
buttons and DHW. Refer to
fig. 25 for the characteristics.
OFF: This item gives access to the "exter-
nal temperature shutdown value.
Use the buttons and DHW to
modify the value (from 0 to 40°C), if
set to 0 the function is disabled. Igni-
tion occurs when the temperature of
the external probe is more than 2°C
lower than the set temperature.
fig. 23
To exit the Climatic curves setting [OTC] menu, press the button repeatedly until reaching
the main screen.
If the room temperature is lower than the desired value, it is advisable to set a higher order curve
and vice versa. Proceed by increasing or decreasing in steps of one and check the result in the
room.
Adjustments from Remote Timer Control
AIf the boiler is connected to the Remote Timer Control (optional), the previously described
adjustments are managed as described in table 2.
fig. 24- Compensation curves
fig. 25- Example of compensation parallel
curve offset

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EN cod. 3541V300 - Rev. 02 - 03/2021
Table 2
System water pressure adjustment
The filling pressure, with system cold, read
on the boiler water gauge (detail 2 - fig. 26)
must be approx 1.0 bar. If the system pres-
sure falls below minimum values, the boiler
stops and fault F37 is displayed. Pull out the
filling knob (detail 1 - fig. 26) and turn it
counter-clockwise to return it to the initial
value. Always close it afterwards.
Once the system pressure is restored, the
boiler will activate the 300-second air vent-
ing cycle, indicated on the display by Fh.
To avoid boiler shutdown, it is advisable to
periodically check (with system cold) the
pressure on the pressure gauge or on the
display (detail 12 - fig. 1). In case of a pres-
sure below 0.8 bar, it is advisable to restore
it. fig. 26- Filling knob
Heating temperature adjustment Adjustment can be made from the Remote Timer Control menu and the
boiler control panel.
DHW temperature adjustment Adjustment can be made from the Remote Timer Control menu and the
boiler control panel.
Summer/Winter Switchover Summer mode has priority over a possible Remote Timer Control heating
demand.
Eco/Comfort selection
On disabling DHW from the Remote Timer Control menu, the boiler selects
Economy mode. In this condition, the eco/comfort button on the boiler
panel is disabled.
By enabling DHW from the Remote Timer Control menu, the boiler selects
Comfort mode. In this condition it is possible select one of the two modes
on the boiler panel.
Sliding Temperature You can make all the adjustments by using the remote timer control.
Display Description Operation
High pressure The boiler stops
Pressure slightly high The boiler works at reduced power
Optimum pressure Normal operation
Pressure slightly low
(The indication with the symbol
is visible only if parameter
b09 is set to 1).
The boiler continues to work.
It is advisable to refill the system as soon as
possible.
Low pressure The boiler stops

314 EN
cod. 3541V300 - Rev. 02 - 03/2021
System draining
The drain cock ring nut is located under the
safety valve inside the boiler.
To drain the system, turn the ring nut (ref. 3
- fig. 27) counter-clockwise to open the
cock. Do not use any tools; use hands only.
To drain only the water in the boiler, first
close the shut-off valves between the sys-
tem and boiler before turning the ring nut.
fig. 27