Ferroli BlueHelix HiTech RRT H Technical manual

INSTRUCTIONS FOR USE, INSTALLATION AND MAINTENANCE

B
297
EN cod. 3541V481 - Rev. 00 - 06/2021
 Read the warnings in this
instruction booklet carefully
since they provide impor-
tant information on safe in-
stallation, 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 refer-
ence.
 If the unit is sold or trans-
ferred 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 mainte-
nance must be carried out
by professionally qualified
personnel, according to
current regulations and the
manufacturer's instruc-
tions.
 Incorrect installation or in-
adequate maintenance can
result in damage or injury.
The manufacturer declines
any liability for damage
caused by errors in installa-
tion and use or by failure to
follow the instructions pro-
vided.
 Before carrying out any
cleaning 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 re-
pair it or directly intervene.
Contact professionally
qualified personnel. Any re-
pair/replacement of the
products must only be car-
ried out by qualified person-
nel using genuine parts.
Failure to comply with the
above can compromise the
safety of the unit.
 Periodic maintenance per-
formed by qualified person-
nel is essential in order to
ensure proper operation of
the unit.
 This unit must only be used
for its intended purpose.
Any other use is deemed
improper and therefore
hazardous.
 After unpacking, check the
good condition of the con-

298 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. 3541V481 - Rev. 00 - 06/2021
tents. The packing materi-
als are potentially
hazardous and must not be
left within the reach of chil-
dren.
 The unit can be used by
children aged at least 8
years and by persons with
reduced physical, sensory
or mental capabilities, or
lacking experience or the
necessary knowledge, only
if under supervision or they
have received instructions
on its safe use and the re-
lated 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 supervi-
sion.
 In case of doubt, do not use
the unit. Contact the suppli-
er.
 The unit and its accesso-
ries must be appropriately
disposed of in compliance
with current regulations.
 The images given in this
manual are a simplified rep-
resentation of the product.
In this representation there
may be slight and insignifi-
cant differences with re-
spect to the product
supplied.

299
1 Operating instructions ........................................................................................................ 300
1.1 Introduction.........................................................................................................................................300
1.2 Control panel ......................................................................................................................................300
1.3 Connection to the power supply, switching on and off .......................................................................303
1.4 Adjustments........................................................................................................................................ 306
2 Installation ............................................................................................................................ 316
2.1 General Instructions ...........................................................................................................................316
2.2 Place of installation ............................................................................................................................316
2.3 Plumbing connections ........................................................................................................................ 316
2.4 Gas connection ..................................................................................................................................318
2.5 Electrical connections.........................................................................................................................318
2.6 Fume ducts.........................................................................................................................................321
2.7 Condensate drain connection............................................................................................................. 327
3 Service and maintenance.................................................................................................... 328
3.1 Adjustments........................................................................................................................................ 328
3.2 Commissioning...................................................................................................................................335
3.3 Maintenance.......................................................................................................................................336
3.4 Troubleshooting..................................................................................................................................343
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

300 EN
cod. 3541V481 - Rev. 00 - 06/2021
1. Operating instructions
1.1 Introduction
Dear Customer,
BlueHelix HiTech RRT H 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.
AThe boiler is arranged for connection to an external storage tank for hot water (op-
tional). In this manual all the functions relevant to domestic hot water production
are only active with the optional hot water tank connected as indicated in sec. 2.3
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

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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 the hot water
tank probe) is indicated by the faucet icon
flashing.
When the burner is lit, the flame symbol ap-
pears and the 3 levels indicate the actual in-
tensity.
fig. 3

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cod. 3541V481 - Rev. 00 - 06/2021
Comfort
During Comfort mode (hot water tank temperature restoring) the flame symbol appears and the
faucet flashes.
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

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1.3 Connection to the power supply, switching on and off
Boiler not electrically powered
BTo avoid damage caused by freezing during long idle pe-
riods 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
venting 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
water 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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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

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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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cod. 3541V481 - Rev. 00 - 06/2021
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 vary the temperature from a mini-
mum of 10°C to a maximum of 65°C. The
maximum value can be changed inside the
parameters menu [TSP] via parameter
P46.
fig. 15

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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.
Tank exclusion (ECO)
Heating/hot water tank temperature maintaining can be excluded by the user. In case of exclusion,
hot water will not be delivered.
The user can deactivate the hot water tank (ECO mode) by pressing the button for 2 seconds.
In ECO mode the display activates the symbol (detail 12 - fig. 1).
To activate COMFORT mode (hot water tank on) 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 and heating buttons.
To access the menus in the navigation menu [MENU], press the button after selecting the
desired item.
[Service] - Menu reserved for the install-
er
See Installer menu [SERVICE] on
page 308.
[Diagnostic] - Provides information on
boiler status, in real time.
See Boiler information menu [Diagnos-
tic] on page 309.
[Counters] - Boiler counters.
See Boiler counters menu [Counters]
on page 310.
[Alarm] - Storage of last faults that oc-
curred in the boiler.
See Boiler faults menu [Alarm] on
page 311.
[Display] - For doing the display settings.
See Display adjustment menu [Display]
on page 312.
fig. 16- Main menu

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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
parameters
[TEST] - Activation of boiler Test mode.
[OTC] - Setting of climatic curves for ad-
justment with external probe.
[Zone] - Settings of climatic curves of ad-
ditional zones.
[Auto Setup] - This menu is used to acti-
vate calibration. Visible only with param-
eter b27 set to 5.
fig. 18

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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, press the button repeatedly 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 0 ÷ 9999 RPM
[Pump speed] Actual modulating circulating pump speed (%) 00% = Min., 100% = Max.
[Power] Actual burner power (%) 0 ÷ 100 %
[DHW flow] Actual DHW draw (l/min) 00 ÷ 99 l/min
[Water Pressure] Actual system water pressure (bar) 0.0 ÷ 9.9 bar
[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

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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 308 ***) and press the button .
Using the buttons and heating select the menu Climatic curves setting [OTC] and con-
firm by pressing the button .

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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.
fig. 24- Compensation curves
fig. 25- Example of compensation parallel
curve offset

314 EN
cod. 3541V481 - Rev. 00 - 06/2021
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.
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

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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