ROC LL1GBQ24-B26CG Instruction manual

Suitable for:
●
Installer
●
Adjustment Personnel
●
Maintainer
Condensing wall
mounted gas boiler
Manual for Use, Installaon
and Maintenance
PIN.NO : 0063CR7770

1. Overview.............................3
1.1 Reading advices.................3
1.2 Customer care...................4
1.3 Advice for the installer...4
1.4 CE symbol..........................5
2. Safety regulaons...............6
2.1 Usage condion................6
2.2 Installaon and adjustment
................................................6
2.3 When the gas smell is found
................................................6
2.4 When making modificaon
work around the gas boiler ....7
2.5 Far from inflammable and
explosive materials.................7
2.6 Check boiler......................7
3. Product descripon.............8
3.1 Control panel....................8
3.2 Display...............................8
3.3 Inner structure.................9
3.4 Overall dimension and
outlet posion map...............10
3.5 Technical data.................11
4. Boiler installaon..............12
4.1 Reference standard........12
4.2 Venlaon.......................12
4.3 Gas supply.......................12
4.4 Power supply...................12
4.5 Water supply...................13
4.6 Install the boiler..............16
4.7 Pay aenon to noise
control during installaon.....16
4.8 Open the box...................16
4.9 Minimum distance of
installaon and maintenance....17
4.10 Dimension of flue
mounng hole .......................18
4.11 Installaon of
inlet/exhaust flue..................19
4.12 Pipe installaon.............23
4.13 Power connecon.........24
5. Boiler adjustment.............26
5.1 Check the circuit and
power....................................27
5.2 Clean the heang system....27
5.3 Fill water to the system...27
5.4 Examinaon before
start........................................28
5.5 Start operaon................30
5.6 Control operaon
parameter.............................32
5.7 Flue gas analysis.............34
6. Maintenance precauons.....36
6.1 An-freeze funcon........37
6.2 Operaon failure cause and
selement.............................38
7. Gas boiler dismantling
instrucon.............................39
7.1 Basic dismantling.............39
7.2 Circuit component...........41
7.3 Water system..................44
7.4 Combuson system.........47
7.5 Maintenance plan............51
8. Electrical connecon
diagram.................................53
2
Contents

3
These instrucons are suitable for ROC wall mounted gas boilers.To ensure the correct
installaon, adjustment and maintenance. Please read carefully the general
informaon provided in this instrucon, and keep it well.
Totheuser
Please ensure you have this complete boiler manual. It provides a record for
your boiler adjustment, which provides important informaon for the
installaon of aer-sales engineering personnel . The manual also supplies the
contact informaon of installer. If you need the guide or face any gas boiler
problem during the usage of gas boiler, you can contact with them.
Just like your car, if the boiler is regularly maintained, the boiler will work more
reliably and efficiently. We recommend annual inspecon, so that this manual
will keep the boiler maintenance records.
Your legimate rights and interests will not be affected.
Totheinstaller
As a part of boiler adjustment, it is vital that this manual is completed and given to
the user. Please ensure that your customer is aware of the importance of keeping
the manual safely as a record of the boiler installaon and maintenance.
Please ensure that your customer is aware of the correct operaon of the system,
boiler and controls.
ROC recommends that protecve clothing is used when installing and maintaining
the boiler, i.e. protecve gloves.
For the rejected material which is produced in installaon,or when the boiler is at
the end of life,please handle properly according to the local regulaon.
1. Overview
1.1 Reading advices

4
ROC, as a leading manufacturer of domesc and commercial water heang
appliances, is commied to providing high quality products and good aer
sales service.
Maintenance
The manufacturer’s guarantee starts from the purchase date. The guarantee is
invalidated if the boiler is not installed in accordance with the recommendaons
made herein or in a manner not approved by the manufacturer. To assist us in
providing you with efficient aer sales service, please return the guarantee
registraon card enclosed with the boiler without delay.
All the boiler installaon, adjustment and maintenance must be carried out by
professional personnel of compliance with present gas safe(safe and usage) in
accordance with the manual provided by us.
Improper installaon can result in the loss and injury to persons, animals and
personal property, the manufacturer will not take possibility for such . To ensure
efficient and safe operaon , it is recommend that the boiler is maintained
annually by professional personnel.
Noce!
If you know the boiler is faulty, please do not use it unl the fault is resolved by
professional personnel.
For the loss and injury caused by failure to comply with instrucons, the
manufacturer will not take any responsibility .
The boiler installaon and first ignion must be performed by qualified
personnel in compliance with current naonal relave installaon regulaons,
and in conformity with any requirements established by local authories. Aer
the boiler is installed, the installer must ensure that the end user receives the
correct declaraon and the operaon manual, and should provide user all necessary
informaon as to how the boiler and the devices safety should be handled.
1.2 Customer care
1.3 Advice for the installer

5
This boiler is designed to produce domesc hot water. It should be connected to a
heang system and a distribuon network for domesc hot water, both of which
must be compable with its performance and power levels.
Unless specified, the usage purpose of the boiler is strictly limited .The
manufacturer can not take responsibility for any damage caused by improper,
incorrect and unreasonable usage of the appliance or by the failure to comply
with the instrucons given in this manual.
Installaon, maintenance and all other work must be performed in full conformity
with the governing legal regulaons and the instrucons provided by the
manufacturer. Incorrect installaon can harm persons, animals and possessions.
Once you open all packaging, make sure the boiler is intact and that no parts are lost.
If there is lost case, please contact with your supplier.
Keep all package materials (clips, plasc bags, polystyrene foam etc.) out of the
reach of children, as it may cause a potenal hazard. If the boiler occurs fault
and malfuncon , please turn it off, then turn off the gas valve, and do not
aempt to repair it by yourself. Please contact with a qualified professional
personnel instead.
Before performing any maintenance or repair work on the boiler, make sure
you have pulled out the power plug, disconnected power supply, turned off
the gas control valve . When you finish these work, please ask the qualified
technician to check the pipework and boiler efficiency.
All the maintenance should only be used original spare parts, and be carried out
by a qualified professional. Failure to comply with the above instrucons could
affect the safety of the boiler and paral liability failure of the manufacturer.
Use a cloth dampened with soapy water to clean external boiler. Do not use aggressive
detergents, inseccides or toxic products. If the boiler is used in full compliance with
current legislaon, it will operate in a safe, environmentally-friendly and energy-saving
manner. If using external devices or oponal accessories, Please make sure they aresafe.
CE symbol, make sure the boiler is in conformity with boiler CE direcve
2009/142/EC Relave gas appliance
2014/30/EU Relave electromagnec compability
2009/125/EC Relave energy efficiency
2014/35/EU Relave electrical safety
1.4 CE symbol

6
This boiler is only for indoor installaon, domesc heang and domesc hot water
supply.In addion to this, other installaon and usage do not meet the requirement.
The normal usage requirement for boiler is: power supply is 230V~/50Hz, Power
supply capacity is more than10A, there must be a really grounded socket.
Natural gas users require the pre-furnace dynamic pressure is 17 m ba r - 2 5 m
b a r; and tap water supply pressure is 1.2-2.0 bar.If failure to meet the above
requirements, it may result in that the boiler can not work normally.
The boiler installaon,adjustment and maintenance must be carried out by the
qualified personnel in accordance with local gas safety (installaon and
use) ,The technicians who undertake adjustment and maintenance must be
authorized by the manufacturer.
If the boiler is installed in a small compartment, please do not block the
dedicated vents and do not use this compartment as storage room.
If you smell a gas smell or suspect a gas leakage, please operate it as these below
steps:
Turn off the boiler;
Do not turn on or turn off any power switch in a hazardous area;
Do not smoke or turn on any equipment that creates sparks in hazardous areas;
Turn off the gas supply valve on the gas pipework;
Venlate the room;
Contact with your boiler supplier or aer-sales service.
2. Safety regulaon
2.1 Usage condion
2.2 Installaon and adjustment
2.3 When the gas smell is found

7
The following components can not be changed:
- Wall mounted boilers;
- Gas supply pipework, water supply pipework or power supply line;
- Air inlet /Smoke exhaust system;
- Safety valve for heang system;
- Any structural changes round the boiler that affect the boiler safety.
Please do not move the boiler or change the boiler usage aer finishing the installaon
and adjustment of your boiler.
Boiler adjustment and maintenance can only be carried out by a specialist authorized by
ROC distributor. Parts replacement must be used original spare parts. This is a necessary
condion for boiler warranty and maintenance.
Do not use or store any flammable or explosive materials (such as gasoline, paper or
paint) near the boiler.
Aenon!
Exhaust pipes and flammable substances must be kept sufficient distance to prevent
flammable substances temperature from rising to 80 °C above.
You should make maintenance on boiler every year. It is recommended that you
make an appointment with ROC distributor before heang each year.
2.5 Far from inflammable and explosive materials
2.6 Check boiler
2.4 When making modificaon work around the gas boiler

8
1.Timing 2.Funcon switch 3.Up 4.ON/OFF (Power)
5.Informaon indicaon display 6.Down 7.Reset 8.Mode
1 2 3 4 5 6 7 8
Heang ming
Fire class
Heang
temperature indicaon
Heang operaon
state selecon
Time week
Operaon state
Hot water
temperature
Winter mode Malfuncon Timing An-freeze Summer
mode
Indoor
temperature
control
3. Product descripon
3.1 Control panel
3.2 Display

9
3.3 Inner structure
1. Flue temperature sensor
2. Heat exchanger
3. Burner
4. Ignion needle
5. Flame detecon needle
6. frequency conversional fan
7. Gas and air mixer
8. Three way valve motor
9. Plate heat exchanger
10. Water pressure switch
11. Hot water temperature sensor
12. Overheat protector
13. Heang temperature sensor
14. Expansion tank
15. Back water temperature sensor
16. Safety relief valve
17. Water flow volume inductor
18.frequency conversional pump
19. Siphon
20. Gas valve
21. Electrical box
1
2
3
4
5
6
8
11
10
12
13
14
17
19
20
16
21
7
9
15
18

10
Unit: mm
3.4 Overall dimension and outlet posion map
A. Gas B. Domesc hot water C. Cold water
D. Heang back water inlet E. Heang water outlet
LL1GBQ24-B26CG

11
3.5 Technical data
Model
Gas boiler type
Gas boiler type
Gas type
Using gas
Noxlevel
Capacity
Nominal heat input (Qn)
Nominal heat output (Pn)
Nominal condensing output (50/30°C)
Minimum heat input (Qr)
Minimum heat output (Pr)
°C)
°C)
Technical data
Normal capacity gas consumption volume (NG)
Flue gas temperature (NG)
Anti-frost protection system start temperature
Minimum domestic hot water volume
Sanitary water maximum pressure
Sanitary water minimum pressure
Expansion tank capacity
Expansion tank preset pressure
Heating system maximum pressure
NG normal pressure
Performance
Heating water maximum temperature
Hot water maximum temperature
Hot water rate ( T=30°C)
Electric circuit
Supply voltage/frequency
Input electric power
Protection level
-
-
-
-
-
kW
kW
kW
kW
kW
%
%
%
m3/h
°C
°C
kg/min
MPa
MPa
L
MPa
MPa
KPa
°C
°C
kg/min
V~/Hz
W
24.8
24.0
26.0
5.0
5.0
96.8
108.8
2.60
69
5
2.5
0.8
0.02
6.5
0.1
0.3
2.0
85-30
60-30
11.2
230/50
80
IPX4D
Domestic condensing gas boiler
C13
I2H
2H-G20-20 mbar
6
LL1GBQ24-B26CG
106.4

In Europe, all boiler installaon and adjustment should be performed by
professional authorized by ROC company according to actual installaon standards,
and make sure it is compliance with safety and health standards.
Hazardous Substances Control Regulaons
The material used in the producon of this boiler is harmless and requires no special
care during maintenance.
Avoid installing the boiler in the air inlet which may be polluted by chemicals such as
chlorine (swimming pool) or ammonia (barber shop), or alkali(laundry).
The room in which the boiler is installed does not require specific venlaon. If the
boiler is installed in a cupboard or compartment venlaon is not required for
cooling purposes.
The gas installaon and ghtness test must be in accordance with relave
requirement . Ensure that the pipe size is adequate for demand including other gas
appliances on the same supply.
12
4. Boiler installaon
4.1 Reference standard
4.2 Venlaon
4.3 Gas supply
Boiler requires to use of 230V/50Hz AC, aer confirming the voltage, and connect
the power plug (voltage requirements 230V ± 15%, it is suggested the users with
instability voltage and high or low voltage to equip with a power regulator).
WARNING:
To avoid the risk of electrical leakage, the socket used for connecon to this product
must have a good grounding device.
4.4 Power supply

The boiler is only suitable for sealed systems. The maximum working pressure for
the boiler is 6bar. All fings and pipework for the boiler should be of the same
standard. If there is a possibility of the incoming mains pressure exceeding 6bar,
parcularly at night, then a suitable pressure liming valve must be fied.
Shower
Any shower valves used with the boiler should be of a thermostac or pressure
balanced type. Refer to the performance guidance and adaptability of shower
manufacturer.
Thefollowingnotesaregivenforgeneralguidance:
If the boiler is installed on the exisng system, any unsuitable addives must be
removed.Under any circumstances ,the boiler must not be ignited before the system
is completely flushed.
In hard water areas or systems containing large amounts of water, It is necessary to
carry out water treatment to prevent scale formaon in the main heat
exchanger.The formaon of scale can greatly affect the efficiency of heat exchanger,
because small areas of scale can cause a high increase of the temperature in the
metal parts and therefore increase the heat pressure of heat exchanger.
Dematerialized water is more aggressive in this situaon ,it is necessary to treat the
water with an appropriate preservave.
Any treatment of water using addives in the system for an-freezing protecon or
for an-corrosion has to absolutely suitable for all metals in the system.
If an-freezing substances are to be used in system, check carefully that they are
compable with the metals used in the circuit.
Periodically check the PH balance of water/an-freeze mixture of the boiler system
and replace it when the tested amount is out of range spulated by the
manufacturer (7< pH < 8).
DO NOT MIX DIFFERENT TYPES OF ANTI-FREEZE. In floor heang system, through
the use of plasc pipe with anaerobic infiltraon protecon on the walls and
through the formaon of oxides and bacterial agents, it can cause corrosion of the
systems metal parts (metal piping, boiler etc.)
13
4.5 Water supply

To prevent this problem ,it is necessary to use the pipes with an “oxygen proof
barrier”. If pipes of this kind are not used, keep the system separate by installing
heang exchangers of those with a specific system water treatment.
IMPORTANT
Failure to carry out the water treatment procedure will invalidate the boiler
guarantee.
Systemcontrols
The boiler is electrically controlled and is suitable for most modern electronic me
and temperature controls. The adding of such external controls can be beneficial to
the efficient operaon of the system.
Installaon posion
The boiler can be installed on any suitable internal wall (sound proof is required
when installing onto a stud paron wall). Provision must be made to allow for the
correct roung of the flue and sighng of terminals to allow the safe and efficient
removal of the flue products. A compartment or cupboard used can be built or
modified for this purpose. It is not necessary to provide permanent venlaon for
cooling purposes.
14

CondensateDischarge
The condensate discharge pipe from the boiler must have a connuous fall of 2.5°
and must be inserted by at least 50mm into a suitable acid resistant pipe –e.g. plasc
waste or overflow pipe. The condensate discharge pipe must have a minimum diameter
22mm, must have a connuous fall and can be installed to prevent freezing.
i) Connect into an drainage vercal pipe (at least 450mm above the inverted
pipe). Spray gun is matched in the pipe.
ii) A trap giving a water seal of at least 75mm must be incorporated into the pipe
run, there also must be an air beak upstream of trap.
iii) Connect into the sewage system of building such as a washing machine or
underground sewage pipe. The connecon of washing machine must be
upwards. If the connecon is downwards, then the sewage pipe should leave
an addional net, and supply a minimum water seal of 75mm and an air port
must be incorporated with the pipework, as above.
iv) Terminate into a gully, below the net but above the water level
v) Enter into a sewer
15

16
Boiler Box:
Installaon bag:
Flue Box:
Accessory bag:
Hanging plate
Expansion screws
(used to fix the hanging plate)
coaxial 1m terminal flue
90° coaxial elbow
User’s manual
Warranty card
Gas boiler
4.6 Install the boiler
4.7 Pay aenon to noise control during installaon
Please check that you are familiar with the installaon requirement before
commencing work.
The installaon accessories described in the following list are included in the
boiler package:
Please comply with the relevant naonal or region standard or guidelines when
installing the wall mounted gas boiler. The noise of installaon should be
controlled within the local standard requirement, pay special aenon to the
any noise control me zones.
4.8 Open the box
The boiler was packed in a hard box with foam protecon. Pay aenon that the
arrow in the carton should be down when opening the box. (Refer to below
diagram)
Picture 5.1 Diagram of opening package
( FILLING LOOP NOT SUPPLIED )

17
4.9 Minimum distance of installaon and maintenance
Both the installaon and maintenance of the boiler must keep at least the
following distance(refer to picture 5.2)
--Boom distance 400mm
--Side distance 200mm
--Top distance 400mm
--Front distance 500mm
Picture 5.2 minimum distance of installaon and maintenance.
Note
Be sure to check the minimum distance required above before installing the
boiler. Aer finishing installaon, if you need to make construcon or
alternaon around the boiler(such as decoraon etc),please also ensure that it is
such minimum distance, otherwise it may affect the usage and maintenance of
the boiler in the future.
We advise that the minimum distances from inflammable materials is 500 mm.
If the wall is sensive to heat source such as the wood board,it should be
protected by suitable insulaon.
When the gas boiler is installed above other device,the distance between the
ousde case of the gas boiler and other device should not less than 300mm.
To reduce any unexpected noise, the gas boiler should be firmly installed,
handle well the installaon of the pipe, the special aenon is that to
discharge the air inside the heang pipeline.

The boiler should be installed on the vercal,
flat, and solid load-bearing walls. Check the
load-bearing capacity of all fasteners.
Determine the posion of installing the inlet /
exhaust balanced flue and mark it on the
wall.(see picture 5.3)
Tips: the boiler shall not be installed on
the combusble wall surface.
Use the drill to make a hole with a
diameter of 120mm in Ф120 posion and
pass through the wall, which is used for
installing forced draught flue.
Use expansion bolts to fix the product
hang up plate on the walls.
Li the boiler up, so that the two square
holes behind horizontal hanging beam are
corresponding to the hooks on the wall. And
close to the wall , then put down the boiler
lightly to make this two square holes of
horizontal hanging beam to enter into the
hook. (see picture 5.4).
18
4.10 Dimension of flue mounng hole
Picture 5.4 Installaon diagram
Picture 5.3 The mounng hole
Hole opening posion
of flue which installs
the air filter.
Hang-up
plate

19
In addion to boiler , ROC distributor also supply a variety of treatment opons for
terminal installaon of inlet/exhaust flue. Without these terminals, the boiler can
not operate.
When the user buy flue himself, please read the installaon manual which the
flue is aached carefully. or refer to this manual but something to note here is
keep the performance and soundness of boiler and flue gas pipe at end of the
work.
Note: The boiler must be installed so that the flue terminal is exposed to outdoor air.
The terminal must not discharge into another room or space such as an outdoor
toilets or huts.
It is important that the flue terminal must leave a free passage for air circulaon.
The flue terminal installaon should consider the damage or discoloraon to
surrounding building, and the flue must be installed in the place where the damage
is impossible to occur. In cold or humid weather, water vapor can condense and
leave on the flue terminal. The effect of such “steaming” must be considered.
If the flue terminal is less than 1 meters away from the balcony, ground or flat roof where
people can access, then a suitable stainless steel terminal protecve cover must be fied.
The minimum acceptable spacing from the flue terminal to obstrucons and
venlaon port are specified in diagram below.
A Directly below an open window etc 300 mm
B Horizontally to an open window etc 300 mm
C Below guers, sewage pipes or drain pipes 75mm
D Below eaves 200mm
E Vercally to drain pipes or sewage pipes 75 mm
F From internal or external corner 300 mm
H From a surface facing the terminal 500 mm
I From a terminal facing a terminal 500 mm
J Vercally to a terminal on the same wall 1500 mm
K Horizontally to a terminal on the same wall 300 mm
4.11 Installaon of the inlet/exhaust flue
Picture 5.5

Standard 1000mm flue system
includes:
1. Seal for horizontal flue
duct and external wall
2. 90° elbow
3. 30mm flue clamp
4. 48mm flue clamp
5. Internal trim ring
6. External wall seal
20
Fluesystem
Standard flue installaon
Flue Clamp Minimum length=500mm