Hoval UltraGas 2 User manual
Subject to modifi cations | EN
Technical information
Installation instructions
4 220 456 / 02 - 03/21
Hoval products must be installed and commissioned
by specialists only. These instructions are intended for
service engineers. Electrical installation must be per-
formed by a licensed electrical company.
Floor-standing gas condensing boilers UltraGas®2
(125-1550) acc. to EN 15502-1/15502-2-1 are suitable
and licensed for use as heat generators for hot water
heating systems with a permissible ow temperature of
up to 95 °C1). They are designed for continuously con-
trolled reduced operation in heating systems.
1) See technical data
UltraGas®2 (125-1550)
Gas condensing boilers
for natural gas in modulating operation
These instructions are applicable to the fol-
lowing types:
Nominal output ranges at 50/30°C
and natural gas
51-UltraGas®2 (125) 25 - 126 kW
51-UltraGas®2 (150) 35 - 151 kW
51-UltraGas® 2 (190) 38 - 191 kW
51-UltraGas®2 (230) 51 - 233 kW
51-UltraGas®2 (300) 67 - 302 kW
51-UltraGas®2 (350) 73 - 350 kW
51-UltraGas® 2 (400) 85 - 401 kW
51-UltraGas® 2 (450) 96 - 453 kW
51-UltraGas®2 (530) 110 - 533 kW
51-UltraGas®2 (620) 136 - 622 kW
51-UltraGas®2 (700) 146 - 703 kW
51-UltraGas® 2 (800) 166 - 804 kW
51-UltraGas® 2 (1000) 205 - 999 kW
51-UltraGas® 2 (1100) 229 - 1112 kW
51-UltraGas® 2 (1300) 269 - 1320 kW
51-UltraGas®2 (1550) 324 - 1550 kW
24 220 456 / 02
TABLE OF CONTENTS
1. Important notices
1.1 General safety instructions.................................................................................................................................................4
1.2 Explanation of the symbols ................................................................................................................................................4
1.2.1 Warnings ..........................................................................................................................................................................4
1.2.2 Warning symbols...............................................................................................................................................................4
1.2.3 Information........................................................................................................................................................................5
1.3 On delivery...........................................................................................................................................................................5
1.4 Guarantee ............................................................................................................................................................................5
1.5 Instructions..........................................................................................................................................................................5
1.6 Regulations, standards, ordinances to be complied with for proper use......................................................................................................6
2. Installation
2.1 Set-up...................................................................................................................................................................................7
2.1.1 Space requirement of UltraGas®2 (125-1550)...................................................................................................................7
2.1.2 Suspension option ............................................................................................................................................................9
2.1.3 Set-up of UltraGas®2 (125,150)......................................................................................................................................10
2.1.4 Set-up of UltraGas®2 (190-1550).................................................................................................................................... 11
2.2 Installation of the thermal insulation................................................................................................................................12
2.3 Installation of the cladding ...............................................................................................................................................13
2.4 Removing the cladding for maintenance and service work.............................................................................................19
3. Technical information
3.1 Description of the boiler ...................................................................................................................................................21
3.2 Meaning of the data on the data plate ..............................................................................................................................22
3.3 UltraGas®2 technical data.................................................................................................................................................23
3.3.1 UltraGas®2 (125-230).....................................................................................................................................................23
3.3.2 UltraGas®2 (300-450).....................................................................................................................................................24
3.3.3 UltraGas®2 (530-800).....................................................................................................................................................25
3.3.4 UltraGas®2 (1000-1550).................................................................................................................................................26
3.4 Dimensions/space required ..............................................................................................................................................27
3.4.1 Overall unit dimensions...................................................................................................................................................28
3.5 Heating water side flow resistance...................................................................................................................................29
3.6 Short description of the functions of the automatic function device BIC 970................................................................30
4. Installation
4.1 Safety instructions ............................................................................................................................................................31
4.2 Requirements on the boiler room .....................................................................................................................................31
4.2.1 Room air dependent installation......................................................................................................................................31
4.2.2 Room air independent installation ...................................................................................................................................31
4.3 Flue gas connection, flue gas line....................................................................................................................................32
4.3.1 Standard values for flue gas line dimensions...................................................................................................................33
4.3.2 Air/flue gas routing .........................................................................................................................................................34
4.4 Condensate drain ..............................................................................................................................................................35
4.4.1 Condensate drain engineering guidelines........................................................................................................................35
4.4.2 Installation of the siphon and condensate drain...............................................................................................................36
4.4.2.1 Installation of the condensate drain siphon – sewer system (standard design)................................................................................36
4.4.2.2 Installation of the condensate drain siphon – condensate pump – sewer system at higher level...................................................................37
4.4.2.3 Installation of the condensate drain siphon – neutralisation unit – sewer system.............................................................................37
4.4.2.4 Installation of the condensate drain siphon – neutralisation unit – condensate pump – sewer system at higher level.......................38
4.5 Gas connection..................................................................................................................................................................38
4.6 Hydraulic connection ........................................................................................................................................................39
4.6.1 To be observed on site....................................................................................................................................................39
4.6.2 Hydraulic integration .......................................................................................................................................................39
4.6.2.1 Example .........................................................................................................................................................................................40
4.6.2.2 Cascades .......................................................................................................................................................................................41
4.7 Sound insulation ...............................................................................................................................................................41
4.8 Electrical connection.........................................................................................................................................................42
4.8.1 Safety precaution for installation in line with EMC requirements......................................................................................43
4.8.2 Recommended cable cross-sections and maximum permitted cable lengths ...................................................................45
34 220 456 / 02
TABLE OF CONTENTS
5. Initial commissioning
5.1 Safety instructions ............................................................................................................................................................46
5.2 Filling the heating system.................................................................................................................................................46
5.3 Water quality in heating systems......................................................................................................................................47
5.4 Parameterisation ...............................................................................................................................................................49
5.5 Venting the gas pipe..........................................................................................................................................................49
5.6 Switching on......................................................................................................................................................................49
5.7 Gas inlet pressure .............................................................................................................................................................49
5.8 Functional check of pressure monitoring device.............................................................................................................49
5.8.1 Checking the function of the pressure switch (safety check)............................................................................................49
5.9 Setting the gas quantity, measuring the O2(CO2) and NOx/CO content in the flue gas .................................................50
5.9.1 Flue gas measurement UltraGas®2 (125-700) ................................................................................................................50
5.9.2 Flue gas measurement UltraGas®2 (800-1550) ..............................................................................................................51
5.10 Handover to the owner/user..............................................................................................................................................52
5.11 Activation of screed function............................................................................................................................................53
6. Maintenance
6.1 Safety instructions ............................................................................................................................................................55
6.2 Deaeration..........................................................................................................................................................................55
6.3 Top up with water ..............................................................................................................................................................55
6.4 Renewing fuse ...................................................................................................................................................................55
6.5 Information for fire inspector / chimney sweep regarding emission and manual operation settings ...........................56
6.6 Cleaning and maintaining the gas boiler..........................................................................................................................57
6.7 Setting the gas quantity, measuring the O2(CO2) and NOx/CO content in the flue gas .................................................62
6.8 BIC 970 automatic function device parameter list ...........................................................................................................63
6.8.1 Automatic function device UltraGas®2 ............................................................................................................................63
44 220 456 / 02
IMPORTANT NOTICES
1. Important notices
1.1 General safety instructions
The plant may only be placed in operation if all
the relevant standards and safety regulations
have been complied with.
trial operation:
• Safety valve installed (system sealed)
• Control in operation (connected to the power supply)
• Sensor for safety temperature limiter connected
(= boiler temperature sensor)
•
•
• Expansion tank connected
• -
ance with the relevant regulations
•
system.
• Burner preset (see chapter 6.7).
WARNING
The heat generator can only be de-ener-
gised by disconnection from the mains
(e.g. all-pole switch).
WARNING
All electrical power supply circuits must be
!
WARNING
Risk of poisoning and explosion if gases leak
out.
• Immediately disconnect the gas supply,
• open windows and doors
• and leave the room
!
WARNING
The boiler must only be suspended using the
four points marked as the crane suspension
option in Fig. 02. The hooks on the rear of the
boiler must not be used to suspend it.
1.2 Explanation of the symbols
1.2.1 Warnings
!
DANGER
... indicates a situation of immediate danger
which will lead to serious or fatal injuries if
not avoided.
!
WARNING
... indicates a situation of possible danger
which can lead to serious or fatal injuries if
not avoided.
!
CAUTION
... indicates a situation of possible danger
which can lead to minor or slight injuries if
not avoided.
NOTICE
... indicates a situation of possible danger
which can lead to damage to property if not
avoided.
1.2.2 Warning symbols
The following warning symbols are combined with signal
words CAUTION, WARNING and DANGER for the warn-
ing notes.
!
General warning symbols
Warning of electrical voltage
Warning of hot surface
Warning of potentially explosive substances
Warning of harmful or irritating substances
Warning of cutting injuries
54 220 456 / 02
IMPORTANT NOTICES
1.2.3 Information
Information:
Provides important information.
Tool:
Indicates which tool you will need for the next
work step.
§
Provides important information. Refers to
standards and directives.
Read the operating instructions before instal
-
lation and commissioning.
Read the installation instructions before in
-
stallation.
1.3 On delivery
Carry out a visual inspection immediately on receiving the
boiler. If any damage is found, take the necessary steps
carrier bears the cost of repairs.
1.4 Guarantee
The guarantee does not cover defects attributable to:
• Failure to comply with these instructions
• Failure to comply with the operating instructions
• Incorrect installation
•
• Incorrect handling
• Contaminated operating materials (gas, water, com-
bustion air)
• Unsuitable chemical additives to the heating water
• Damage caused by the application of force
• Corrosion by halogen compounds (e.g. paints, adhe-
sives, solvents)
• Corrosion caused by not observing the required water
quality (see chapter 5.3)
1.5 Instructions
All instructions relevant to your plant can be found in the
Hoval system manual - please keep all manuals! In ex-
ceptional cases, the instructions can be found with the
components!
Further sources of information:
• Hoval catalogue
• Standards, regulations
64 220 456 / 02
IMPORTANT NOTICES
1.6 Regulations, standards, ordinances to be
complied with for proper use
The locally applicable heating system regulations must
be followed when planning, installing and operating the
gas heat generator:
• The regulations of the local building authorities, insur-
ance companies, chimney sweeps and the state/can-
ton. etc. must also be taken into account.
• The regulations of the responsible gas supply company
are to be complied with if using gas.
• Regulations governing the discharge and treatment of
water authorities.
• Approval by the authorities may be required for
installation.
The standards, guidelines and ordinances listed for the
-
eration of the gas heat generator. The list is intended as
an aid. It is not complete. The currently applicable regula-
tions must be observed.
Countries of destination §
For the countries of destination, the locally applicable
a few examples:
Germany §
• DIN EN 12828 Heating systems in buildings - Design
of hot water heating systems
•
for calculation of the design heat load
• DIN EN 13384 Flue gas systems – Calculation meth-
• DIN EN 14868: Protection of metallic materials against
corrosion - Guidance on the assessment of corrosion
likelihood in closed water circulation systems
• DIN EN 50156; VDE 0116 Electrical equipment of
combustion plants and associated facilities
• DIN VDE 0100 Erection of low-voltage installations
(for electrical installation and the TAB (technical con-
nection requirements of the relevant energy supply
company))
• VDI 2035 Prevention of damage in hot water / heating
systems by corrosion and the formation of scale in
closed hot water heating systems.
• Rules for gas established by DVGW (in particular
DVGW-TRGI Technical rules for gas installations)
• Firing ordinance of the federal states
•
• Worksheet DWA-A 251 Condensate from condensing
boilers
The regulations of the local water authorities could
deviate from the rules in this worksheet.
• Accident prevention regulations
- DGUV Regulation 1 Accident prevention regulations
- Guidelines for prevention
- DGUV Regulation 4 Accident prevention regulations
- Electrical installations and equipment
Austria §
•
Design of hot water heating systems
•
•
calculation methods
•
against corrosion - Guidance on the assessment of
corrosion likelihood in closed water circulation systems
• OVE 50156: Electrical equipment of combustion plants
and associated facilities
•
•
environmental protection
• -
nology - Prevention of damage by corrosion and the
formation of scale in closed hot water heating systems
• ÖVGW rules for gas
•
• SNT regulations
Switzerland §
• SN EN 12828+A1;SIA 384.101+A1 Heating systems in
buildings - Design of hot water heating systems
•
for calculation of the design heat load
• SN EN 13384;SIA 384.42x Flue gas systems - Heat
• SN EN 14868: Protection of metallic materials against
corrosion - Guidance on the assessment of corrosion
likelihood in closed water circulation systems
• SN EN 50156: Electrical equipment of combustion
plants and associated facilities
•
• SWKI HE301-01 Safety engineering installations for
heating systems
• SWKI BT102-01 Water quality for building services
systems
• SVGW rules for gas
•
(Association of Cantonal Fire Insurers)
•
• Water Protection Regulation (GSchV)
•
74 220 456 / 02
INSTALLATION
2. Installation
2.1 Set-up
!
WARNING
The boiler must only be suspended using the four points marked as the crane suspension option in Fig. 02.
The hooks on the rear of the boiler must not be used to suspend it.
If the gas line is routed horizontally to the left,
the minimum distance Q must be observed.
For swinging out the burner, this area must
remain free (see dimension table)
2.1.1 Space requirement of UltraGas®2 (125-1550)
(Dimensions in mm)
Fig. 01
Type A1) A minimum 2) B C H 3) H minimum 4) Q
UltraGas®2 (125,150) 106 720 1060 2053 125
UltraGas® 155 71 820 1160 2
UltraGas®2 (300,350) 285 170 1510 2158 2038 65
UltraGas®2 (400,450) 230 157 1510 2228 2108 141
UltraGas®2 (530-700) 121 121 1110 1600 2364 2244 155
UltraGas®2 (800-1100) 280 1786 2385 2265
UltraGas®2 (1300,1550) 154 1560 2104 2525 2405 163
1) If the room height is too low: the dimension A can be reduced.
2) Caution!
3) Height value assumes adjustable feet are set to 30 mm
4) The feet can be shortened. Caution!
70 mm barrier height. For details see next page.
*
The boiler can be placed with one side directly on the wall. However, to protect heat-sensitive walls
against damage, a distance of at least 150 mm from the wall must be provided.
*
The cleaning opening must be easily accessible. As a result, a minimum distance of 500 mm must be
maintained on the cleaning opening side.
84 220 456 / 02
IMPORTANT NOTICES
UltraGas®2 with shortened boiler feet
(Dimensions in mm)
UltraGas®2 with walled-in base and adjustable feet
UltraGas®2 with walled-in base without adjusting feet
1 Neutralisation unit (option)
2 Condensate pump (optional)
3 Walled base
4 Adjustable feet 30-80 mm
5 Siphon 2)
1) Height value assumes adjustable feet are set to 30 mm
2) Caution!
UltraGas®2
Type H 1)
(125,150)
(300,350) 2038
(400,450) 2108
(530-700) 2244
(800-1100) 2265
(1300,1550) 2405
UltraGas®2
Type H 1)
(125,150)
(300,350) 2042
(400,450) 2112
(530-700) 2255
(800-1100) 2276
(1300,1550) 2416
UltraGas®2
Type H
(125,150)
(300,350) 2042
(400,450) 2112
(530-700) 2255
(800-1100) 2276
(1300,1550) 2416
Notice
•
The steps of the climbing aid provided
must be horizontal. Adapt the climbing aid
if necessary.
• No refunds for pedestal sheets and adjust-
able feet!
94 220 456 / 02
IMPORTANT NOTICES
2.1.2 Suspension option
Notice
The chains must be at least 1.5 m long!
Crane suspension option
Notice
Do not suspend the crane here!
Fig. 02
10 4 220 456 / 02
IMPORTANT NOTICES
2.1.3 Set-up of UltraGas®2 (125,150)
!
WARNING
Tip hazard during set-up.
There is a danger of the boiler tilting over
when moving it on the pallet or when remov-
ing the pallet.
• Carry out these works with great care.
1. Remove climbing aid (1).
2
1
Fig. 03
2. Turn the boiler on the pallet (2) through 45°.
3. Push the boiler so that 3 boiler feet (3) can be mount-
ed (2 feet on the front and 1 foot on the rear).
33 3
Fig. 04
4. Raise the boiler with the pallet (e.g. using a lift truck).
5. Pre-assemble 3 boiler feet (3) (tighten screws by
hand).
6. Carefully lower the boiler again (danger of tipping over)
- The boiler remains on 3 feet.
7. Remove the pallet from under the boiler.
8.
4
Fig. 05
Tighten the screws of all 4 feet.
!
WARNING
Tip hazard.
Unscrew the feet max. 80 mm.
114 220 456 / 02
IMPORTANT NOTICES
2.1.4 Set-up of UltraGas®2 (190-1550)
1. Remove climbing aid (1).
1
Fig. 06
2. Remove front (2) and rear (3) wooden crossbeam.
4
3
5 6 27
Fig. 07
3. Using a winch (4), raise the front of the boiler.
4. Remove both side beams (5) to the front and side
(see Fig. 07).
5. Pre-assemble front feet (6) (tighten screws by hand).
6. Using a winch, raise the rear of the boiler.
7. Remove both side beams (5).
8. Pre-assemble rear feet and, if provided, middle (7)
feet (tighten screws by hand).
10. Tighten the screws of all feet.
!
WARNING
Tip hazard.
Unscrew the feet max. 80 mm.
12 4 220 456 / 02
IMPORTANT NOTICES
2.2 Installation of the thermal insulation
1. Place the insulation mat (1) around the UltraGas®2 boiler.
- Start at the front of the boiler.
-
2. Fit tension springs (2) to hold the ends of the insulation mat (1) together.
3. Fasten plastic straps (3) and strap fasteners (4).
- Do not overtighten the straps (reduced insulating value).
2
1
34
Fig. 08
2.3 Installation of the cladding
134 220 456 / 02
IMPORTANT NOTICES
2.3 Installation of the cladding
Cladding sections UltraGas®2 (125-1100) in installation sequence
1.1/1.2 Cable duct
2Side wall bottom
3Terminal plate
4 Electrical box
5Rear wall bottom
6.1/6.2 Rear wall centre
7Side wall top
8.1/8.2 Rear wall top
8.3 Blind cover for rear wall top
9–
10 Cover plate
11 Front top
12 Siphon and condensate drain (see chapter 4.4.2)
13 Base strip on the side
14 Base strip on the front
15 Front cover
Cabling
aFlue gas sensor (on the back of the boiler, directly under
the return connection)
b
cWater pressure sensor
d
ePressure switch B18
fFlame monitoring (ionisation)
gBoiler temperature sensor
hBurner wiring: 2 plug connections Fig. 09
ab
c
d
h
g
ef
2
2
4
5
6.1
6.2
8.1
8.2
8.3
7
7
10
11
15
14
13
13
3
11b
11a
1.11.2
1.11.2
14 4 220 456 / 02
IMPORTANT NOTICES
Cladding sections UltraGas®2 (1300.1550) in installation sequence
1.1/1.2 Cable duct
2.1/2.2 Side wall bottom
3Clamping plate
4 Electrical box
5Rear wall bottom
6.1/6.2 Rear wall centre
7Side wall top
8.1/8.2 Rear wall top
8.3 Blind cover for rear wall top
9Side wall spacer
10.1/10.2 Cover plate
11 Front top
12 Siphon and condensate drain (see chapter 4.4.2)
13 Base strip on the side
14 Base strip on the front
15 Front cover
Cabling
aFlue gas sensor (on the back of the boiler, directly under
the return connection)
b
cWater pressure sensor
d
ePressure switch B18
fFlame monitoring (ionisation)
gBoiler temperature sensor
hBurner wiring: 2 plug connections
ab
c
d
h
g
ef
4
5
6.1
6.2
8.1
8.2
8.3
7
7
11
15
14
13
13
3
Fig. 10
2.2
2.1
2.1
2.2
10.1
10.2
9
1.11.2
1.2 1.1
154 220 456 / 02
IMPORTANT NOTICES
Cladding sections UltraGas®2 (1300.1550) in installation sequence
1.1/1.2 Cable duct
2.1/2.2 Side wall bottom
3Clamping plate
4 Electrical box
5Rear wall bottom
6.1/6.2 Rear wall centre
7Side wall top
8.1/8.2 Rear wall top
8.3 Blind cover for rear wall top
9Side wall spacer
10.1/10.2 Cover plate
11 Front top
12 Siphon and condensate drain (see chapter 4.4.2)
13 Base strip on the side
14 Base strip on the front
15 Front cover
Cabling
aFlue gas sensor (on the back of the boiler, directly under
the return connection)
b
cWater pressure sensor
d
ePressure switch B18
fFlame monitoring (ionisation)
gBoiler temperature sensor
hBurner wiring: 2 plug connections Fig. 10
1. Set up climbing aid for installation:
Adjust the supplied climbing aid to the required length
using the extension piece (0a) and set it up.
2.
- Insert the cable duct part (1.2) into the cable duct
part (1.1) so that the upper holes are on top of each
other.
- Hang the cable duct (1.1/1.2) on the left or right of
the boiler in the threaded pins.
3. Installing both side walls:
- If there is a side wall support (2a, detail A), turn out-
wards to the side.
- Hang the side wall section (2.1 or 2) on the boiler
in such a way that the recesses at the top and bot-
tom are positioned over the screws (“Fig. 11”, page
15, detail B).
- Only UltraGas®2 (1300.1550):
Install side wall section (2.2) (detail C):
- Position the slots in the side wall section (2.2) on
the corresponding screw heads of the side wall
by pulling down the side wall section (2.2).
- The recesses at the top and bottom of the side
wall section (2.2) must be positioned over the
screws.
-Loosely fasten the lower side wall (2 or 2.1/2.2)
at the fastening positions (2b) using a hexagon nut
and the corresponding washer.
4.
- Position the slots in the terminal plate (3) on the cor-
responding screw heads (3a) of the lower side walls
the terminal plate (3).
- Screw the terminal plate to the lower side walls us-
ing 4 self-tapping screws (3b).
3
3b
3b
3a
3b
3b
3a
Fig. 12
1.1
1.2
2b
2b
2b
2b
2.2
2.1
2.2
2.1
3a
3a
0a
1.1
1.2
2a
Detail A
2.1
2.2
Detail C
Detail B
Fig. 11
16 4 220 456 / 02
IMPORTANT NOTICES
5.
or Fig. 10).
- Cables passing through one of the two cable ducts
(1.1/1.2) must be inserted through the openings at
the bottom of the terminal plate (3c, Fig. 13).
- Fix cables to a strain relief strap.
CAUTION
The cables must not touch any hot parts.
• All cables must be routed through the cable
ducts.
6. Installing the electrical box (4):
NOTICE
scratched by the climbing aid.
- Hold the electrical box (4) horizontally against the
boiler.
- The recesses (4a) on the left and right of the base
of the electrical box must point towards the lower
two studs (4b) on the side of the terminal plate (3).
4
4b
4b
4a
3c
3c
Fig. 13
-
heads of the two lower studs (4b) end up in the two
recesses (4a).
- Then pull the electrical box (4) downwards so that
the studs (4b) hook into the recesses (4a).
- Attach one safety cord (4c) each on the inside left
and inside right of the electrical box.
4d 4c
4c
Fig. 14
- Fold the electrical box closed upwards, lift it and
hook it in, then secure with the screw (4d).
7. Installing rear wall:
5b
6b
6a
5a
5
6b
6.2
6.1
6c
Fig. 15
- Hook the lowest rear wall section (5) with the side
recesses (5a) onto the corresponding screw heads
(5b) of the side walls.
- Installing the rear wall section (6.1):
Press the pin of the rear wall section (6.1) into the
snap lock of the corresponding side wall and let it
engage (6a).
174 220 456 / 02
IMPORTANT NOTICES
- Installing the rear wall section (6.2):
- Position the slots (6b) in the rear wall section (6.2)
on the corresponding screw heads of the rear wall
by pulling down the rear wall section (6.2).
- Press the pin of the rear wall section (6.2) into the
snap lock of the corresponding side wall and let
it engage (6c).
8. Installing both side walls (continued):
- -
tion by tightening the screws (2a, Fig. 11).
- Installing upper side wall (7):
7
7b
7a
7b
7a Detail D
Fig. 16
- Place the slots (7a) in the base of the upper side
wall (7) on the corresponding screw heads of the
and lower side walls together by pushing the upper
side wall (7) backwards.
- Secure the upper side wall (7) using self-trapping
screws (7b) ø 3.5 x 10.
Installing rear wall (continued):
Installing the 3-section upper rear wall (8.1/8.2/8.3).
8.1
8.2
8.3
8c
8c
8a
8b
8b
8a
Fig. 17
- Installing the rear wall section (8.1):
Position the slots in the rear wall section (8.1) on
the corresponding screw heads of the upper side
down (8a).
- Installing the rear wall section (8.2):
Position the slots in the rear wall section (8.2) on
the corresponding screw heads of the upper side
-
tions of the upper rear wall (8.1, 8.2) together by
pulling down (8b).
- Install the screws (8c) on the upper rear wall sec-
tions (8.1 and 8.2).
- Install the blind cover (8.3) of the upper rear wall.
10. UltraGas®2 (1300.1550):
11. Install the cover plate (10 or 10.1/10.2):
- UltraGas®2 (125 - 1100):
Push cover plate (10) into the bracket on the side
walls.
10
Fig. 18
- UltraGas®2 (1300.1550):
First put on the rear cover plate (10.1), then the
front cover plate (10.2) so that:
- the large tab on the cover plate section points to
the front.
10.1 10.2
9
Fig. 19
18 4 220 456 / 02
IMPORTANT NOTICES
12. Installing the upper front (11):
11b
11
11a
Fig. 20
- Install the C-clip (11a) in the cover plate (10 or 10.2)
- Hang the upper front (11) onto the four pins of the
upper side walls (7) so that the pins engage in the
four recesses.
- Fix the upper front to the cover plate (10 or 10.2)
using C-clip (11a) and carriage bolt (11b) (see also
13. Installing siphon and condensate drain (12) (see
chapter “4.4.2 Installation of the siphon and conden-
sate drain”, page 36):
!
WARNING
The supplied siphon must be installed (ver-
tically).
14. Hang the climbing aid on the previously installed wall
15. Installing the base cladding:
14
13
13
Fig. 21
- Installing both base strips (13) on the sides:
Screw the side base strip (13) onto the boiler feet.
- Installing the front base strip (14):
Place the slots of the front base strip (14) on the cor-
responding screw heads on the side base strips (13)
the front base strip (14) downwards.
16. Installing the front cover (15):
Hook front cover into the lower side walls.
15
Fig. 22
194 220 456 / 02
IMPORTANT NOTICES
2.4 Removing the cladding for mainte-
nance and service work
3
4
1
3a
1a
1b
7
7
6.1
6.3
6.2
8
8a
Fig. 23
1. Removing front cover (1):
- Pull front cover away at the top (1a).
- Unhook front cover at the bottom (1b).
2. Set up climbing aid (2).
3
4.2
4.1
7
2
11.1
11.2
Fig. 24
3. Removing the upper front (3):
- Remove securing screw (3a, Fig. 23).
- Lift the upper front slightly and pull it forwards.
4. Remove the cover plates (4 or 4.1/4.2):
- UltraGas®2 (125 - 1100):
4
Fig. 25
- UltraGas®2 (1300.1550):
5
4.2 4.1
Fig. 26
5.
20 4 220 456 / 02
IMPORTANT NOTICES
6. Removing 3-section upper rear wall (6.1/6.2/6.3):
- Remove blind cover (6.1).
- Remove screws (6a).
- Lift the rear wall section (6.2) slightly and pull it away.
- Lift the rear wall section (6.3) slightly and pull it
away.
If sections 6.1, 6.2 and 6.3 remain screwed
together, the upper rear wall can also be dis
-
mantled as a 1 piece, with due care. However,
we recommend this procedure only if there is
plenty of space available.
6.3
6.2
6.1
6a
6a
Fig. 27
7. Removing the upper side walls (7):
- Remove the self-tapping screws (7a).
- Pull the upper side wall (7) forwards slightly and lift
it away upwards.
7
7a
7a Detail
Fig. 28
8. Opening the electrical box (8):
- Remove screw (8a).
- Lift the electrical box (8) and fold it out.
8a
8
Fig. 29
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