Miele PT 825 Series User manual

Installation Instructions
Tumble Dryer
PT825x
PT830xSL
PT833x
PT840x
PT850x
PT880x
To prevent accidents and machine damage, read
these instructions before installation or use. en-US
M.-Nr. 07 713 843

2

Contents
3
IMPORTANT SAFETY INSTRUCTIONS ..............................................................................4
Supply air, exhaust, and ventilation cross-sections.........................................................5
Calculating the total length and diameter of a supply-air or exhaust pipe ........................... 5
Muffler (Miele accessory available to order).......................................................................... 5
Substitute pipe lengths ......................................................................................................... 6
Maximum permissible total pipe length ................................................................................ 6
Room ventilation opening for air intake from the setup room............................................... 7
Supply connection for tumble dryers with a central fresh air intake ..................................... 7
Exhaust connection............................................................................................................... 8
Example1......................................................................................................................... 9
Example2....................................................................................................................... 10
Example3....................................................................................................................... 12
Configuring the room ventilation opening ........................................................................... 13
For example1................................................................................................................. 13
For example2................................................................................................................. 13
For example3................................................................................................................. 13
Gas......................................................................................................................................14
Take these safety precautions if you smell gas................................................................... 14
1. What needs to be observed before commissioning........................................................ 14
Installation site................................................................................................................ 14
Gas supply ..................................................................................................................... 15
2. What needs to be observed during commissioning........................................................ 17
Connection and conversion instructions........................................................................ 17
Settings with natural gas..................................................................................................... 22
Settings with liquid gas 3B/P .............................................................................................. 22
Steam..................................................................................................................................23
Operating pressure values................................................................................................... 23
Fitting information for steam and condensate hoses.......................................................... 23
Heater bank information...................................................................................................... 23
Steam valve for high-pressure steam – indirect .................................................................. 24
Hot water............................................................................................................................25
Operating conditions........................................................................................................... 25
Heater bank information...................................................................................................... 25

IMPORTANT SAFETY INSTRUCTIONS
4
This appliance must be installed by a qualified technician in compliance with local regu-
lations and standards and may only be operated in an adequately ventilated room.
Read the installation instructions and operating instructions before installing and operat-
ing the appliance.
 Keep these installation instructions in a safe place.

Supply air, exhaust, and ventilation cross-sections
5
Calculating the total length and diameter of a supply-air or exhaust pipe
The length of the required pipeline and the number and shape of the elbows are deter-
mined by the structural conditions on-site. In order to maximize the airflow efficiency, the
pipeline should be as short as possible and contain few or minimal sharp elbows.
In addition, a decision must be made as to whether flexible piping or steel piping could be
installed with a round or square cross-section. If the tumble dryer is connected to a central
air supply, the total pipe length is calculated from the sum of all exhaust and supply pipes.
The maximum supply pipe length should not exceed half of the total pipe length.
The exhaust ducting for gas-heated appliances must not be made from flammable
materials.
Otherwise there is a risk of fire.
Use only non-flammable materials for the exhaust ducting. All local regulations for
metallic ducting must be observed.
In upward exhaust ducting systems, a condensate drain must be fitted to the bottom. The
condensate must be drained via a water collection tray or a floor drain positioned in an ap-
propriate location.
If air is being directed from multiple appliances into a combined line (exceptional circum-
stances), a non-return device (non-return flap) must be installed in each separate line to
prevent backflow.
To make subsequent cleaning of the pipes easier, cleaning flaps should be fitted to elbows
wherever possible.
The on-site exhaust ducting and venting to the outdoors must be regularly checked for lint
deposits and cleaned if necessary.
Muffler (Miele accessory available to order)
The use of mufflers for exhaust ducting used with gas-heated washing machines or ironers
is not permitted. The tightness of the muffler is classified as category B in accordance with
EN13180.
In gas-heated tumble dryers, approval must be obtained from the relevant building regula-
tions inspector supervisor’s office for the overall exhaust system. You are not permitted to
install multiple tumble dryers to a single muffler. If the tumble dryer is fitted with a com-
bined line, the muffler is installed directly onto the tumble dryer’s exhaust nozzle. The non-
return flap must then be installed downstream of the muffler in the direction of flow.

Supply air, exhaust, and ventilation cross-sections
6
Substitute pipe lengths
Type of el-
bow
Type PT825x PT830x SL PT833x PT840x PT850x PT880x
90° elbow r=2d 3'7"(1.1m)
45° elbow r=2d 2'3"(0.7m)
90° elbow r=d 6'3"(1.9m)
45° elbow r=d 3'7"(1.1m)
90° corrugated pipe elbow r=2d 10'6"(3.2m)
45° corrugated pipe elbow r=2d 6'6"(2.0m)
90° segmented elbow
(3welded seams)
r=2d 3'11"(1.2m)
90° elbow, Westaflex duct-
ing
r=2d
r=4d
3'11"(1.2m)
2'11"(0.9m)
45° elbow, Westaflex duct-
ing
r=2d
r=4d
2'11"(0.9m)
2'7"(0.8m)
Non-return flap 39'4"(12
m)
18'(5.5m) 39'4"(12
m)
2211"(7m
)
2211"(7m
)
21'3"(6.5
m)
Table1
Maximum permissible total pipe length
Internal minimum pipe diameter
(metal pipes)
PT825x PT833x PT840x PT830xSL
PT850x
PT880x
6"(150mm) 62'4"(19m) 49'2"(15m) 39'4"(12m) 32'9"(10m) 32'9"(10m)
71/16"(180mm) 164'(50m) 124'8"(38m) 101'8"(31m) 88'7"(27m) 24m
77/8"(200mm) 278'10"(85m) 213'3"(65m) 173'10"(53m) 157'5"(48m) 131'2"(40m)
Permissible counter pressure in the
extraction ducting
Max.0.029psi(2mbar) Max.0.043psi(3mbar)
Table2
If the total pipe length exceeds the length specified in Table2, contact Miele ProService.
When connected to the ducting through the exhaust nozzle of an appliance, particular care
must be taken to make sure the connection is secure and air-tight.
The exhaust air ducting must not be channeled into a chimney or flue already in use for
any gas-, coal- or oil-burning installation. The warm and moist exhaust air is to be con-
ducted outside or to a suitable venting duct over the shortest path possible.

Supply air, exhaust, and ventilation cross-sections
7
Due to the higher air flow rates, the exhaust ducting must be laid in such a way that air
flow is not hindered (few bends, short pipelines, well-made connections and transitions
checked for air-tightness). No filters or louvres may be fitted in the exhaust ducting.
The end of ducting leading into the open should be protected against the elements, e.g.,
with a downward facing 90° bend.
During tumble dryer operation, the room must be adequately ventilated.
Room ventilation opening for air intake from the setup room
The minimum dimension of the ventilation opening depends on the cross-section of the
vent pipe.
If the tumble dryer is connected to a central air supply, additional ventilation openings are
normally not needed.
Vent pipe Minimum dimension for ventilation opening
  A A  
6"(150mm) - 277/16"²(177cm²) 825/16"²(531cm²) 101/4"(260mm) 91/16"(230mm)
- 6"(150mm) 347/8"²(225cm²) 1045/8"²(675cm²) 115/8"(295mm) 101/4"(260mm)
71/16"(180mm) - 393/8"²(254cm²) 1181/8"²(762cm²) 123/8"(315mm) 11"(280mm)
- 71/16"(180mm) 501/4"²(324cm²) 15011/16"²(972cm²) 14"(355mm) 123/8"(315mm)
77/8"(200mm) - 4811/16"²(314cm²) 146"²(942cm²) 133/4"(350mm) 123/16"(310mm)
- 77/8"(200mm) 62"²(400cm²) 186"²(1,200cm²) 159/16"(395mm) 133/4"(350mm)
811/16"(220mm) - 587/8"²(380cm²) 17611/16"²(1,140cm²) 15"(381mm) 1413/16"(377mm)
- 811/16"(220mm) 75"²(484cm²) 2251/16"²(1,452cm²) 1615/16"(430mm) 151/16"(382mm)
913/16"(250mm) - 761/8"²(491cm²) 2285/16"²(1,473cm²) 171/8"(435mm) 153/16"(385mm)
- 913/16"(250mm) 967/8"²(625cm²) 2905/8"²(1,875cm²) 195/16"(490mm) 171/8"(435mm)
113/16"(300mm) - 1099/16"²(707cm²) 3283/4"²(2,121cm²) 201/2"(520mm) 181/8"(460mm)
- 113/16"(300mm) 1391/2"²(900cm²) 4181/2"²(2,700cm²) 231/4"(590mm) 201/2"(520mm)
Table3
Supply connection for tumble dryers with a central fresh air intake
For steam-heated tumble dryers, having a central fresh air supply reduces lint build-up
around the heater bank.
Removing the protective cover exposes live parts.
Any work on the appliance may only be carried out by qualified personnel while the
power is switched off.
For safety reasons, a plastic or steel pipe must be installed from the tumble dryer’s central
fresh air intake over a minimum length of 3ft.(900mm). Each joint must be secured with
two screws. The supply air pipe must not extend into the tumble dryer.

Supply air, exhaust, and ventilation cross-sections
8
2x
2 1/16" (52 mm)
13/16" (20 mm)
Ø 6 5/16" (161 mm)
>35 7/16" (900 mm)
>35 7/16" (900 mm)
Exhaust connection
1 7/16" (37 mm)
Ø 5 15/16" (150 mm)
Ø 5 15/16" (151 mm)

Supply air, exhaust, and ventilation cross-sections
9
Example1
Configuring exhaust ducting made from steel for the PT825x series tumble dryer:
L1, L2: each 9'10"(3m) steel piping
B1, B2: each 90° concertina pipe elbow (r = 2d)
B3: 90°elbow (r=d)
B3
L1
B1
B2L2
1.Total pipe length
Steel pipe L1 = 9'10"(3.0m)
Steel pipe L2 = 9'10"(3.0m)
90° concertina pipe elbow
(r=2d)
B1 = 10'6"(3.2m)*
90° concertina pipe elbow
(r=2d)
B2 = 10'6"(3.2m)*
90°elbow (r=d) B3 = 6'3"(1.9m*)
Total pipe length 46'11"(14.3m)
* Substitute pipe lengths according to Table1
2.Pipe diameter depending on total pipe length
For the calculated total pipe length of 46'11"(14.3m) of a PT 825x, a minimum pipe di-
ameter of 6"(150mm) is specified for the exhaust ducting according to Table 2.

Supply air, exhaust, and ventilation cross-sections
10
Example2
Common combined exhaust ducting for multiple appliances should only be considered as
a solution in exceptional cases.
Configuring combined exhaust ducting made from steel for the PT825x and PT833x se-
ries tumble dryers:
L1–L4 each 6'6"(2m) steel piping
B1–B3 each 90° concertina pipe elbow (r = 2d)
B4 45°elbow (r=2d)
B5 90°elbow (r=d)
If the exhaust from multiple appliances is to be ducted into a combined line, a non-return
device must be installed in each separate line to prevent backflow.
B2
L1
B1 B3
L2 L4 B5
B4
L3
PT 825x PT 833x

Supply air, exhaust, and ventilation cross-sections
11
1.Total pipe length, PT825x
Steel pipe L1 = 6'6"(2.0m)
Steel pipe L2 = 6'6"(2.0m)
Steel pipe L4 = 6'6"(2.0m)
90° concertina pipe elbow
(r=2d)
B1 = 10'6"(3.2m)*
90° concertina pipe elbow
(r=2d)
B2 = 10'6"(3.2m)*
90°elbow (r=d) B3 = 6'3"(1.9m*)
Total pipe length 46'11"(14.3m)
* Substitute pipe lengths according to Table1
2.Pipe diameter depending on total pipe length
Total pipe length=46'11"(14.3m)
Maximum permissible total pipe length 62'4"(19m)=Ø6"(150mm) internal pipe diame-
ter (see Table2)
3.Total pipe length, PT833x
Steel pipe L3 = 6'6"(2.0m)
Steel pipe L4 = 6'6"(2.0m)
90° concertina pipe elbow
(r=2d)
B3 = 10'6"(3.2m)*
45°elbow (r=2d) B4 = 2'3"(0.7m)*
90°elbow (r=d) B5 = 6'2"(1.9m)*
Total pipe length 32'1"(9.8m)
* Substitute pipe lengths according to Table1
4.Pipe diameter depending on total pipe length
Total pipe length=32'1"(9.8m) (PT833x)
Maximum permissible total pipe length 49'2"(15m)=Ø6"(150mm) internal pipe diame-
ter (see Table2)
5.Total pipe diameter
According to Table3
Pipe diameter, PT825x Ø6"(150mm)
=273/8"²(177cm²)
Pipe diameter PT833x Ø6"(150mm)
=273/8"²(177cm²)
Total cross sectionA = 5413/16"²(354cm²)
Total pipe diameter = Ø811/16"(220mm)

Supply air, exhaust, and ventilation cross-sections
12
Example3
Configuring exhaust ducting and a supply pipe made from steel for the PT825x series
tumble dryer:
L1, L2: each 6'6"(2.0m) steel piping
L3: 8'2"(2.5m) steel piping
B1, B2: 90° concertina pipe elbow for each
B3, B4: 90°elbow (r=d) for each
B2
L2
B3
L1
L3
B4
B1
1.Total pipe length
Steel pipe L1 = 6'6"(2.0m)
Steel pipe L2 = 6'6"(2.0m)
Steel pipe L3 = 8'2"(2.5m)
90° concertina pipe elbow B1 = 10'6"(3.2m)*
90° concertina pipe elbow B2 = 10'6"(3.2m)*
90°elbow (r=d) B3 = 6'3"(1.9m*)
90°elbow (r=d) B4 = 6'3"(1.9m*)
Total pipe length 54'9"(16.7m)
* Substitute pipe lengths according to Table1
2.Pipe diameter depending on total pipe length
For the calculated total pipe length of 54'9"(16.7m) of a PT825x, a minimum pipe diame-
ter of 6"(150mm) is specified for the exhaust ducting and supply pipe according to Ta-
ble 2.

Supply air, exhaust, and ventilation cross-sections
13
Configuring the room ventilation opening
Rooms in which flatwork ironers and tumble dryers are operated must have an in-
duced ventilation system (ventilation slots in windows and doors, wall breakthroughs
with louvres or opened windows or skylights).
For example1
A pipe diameter of 6"(150mm) was specified. According to this pipe diameter, a room
ventilation opening with a size of 17'5"(531cm) is required. The edge length is
91/16"(230mm) (see Table3).
For example2
A total pipe diameter of 811/16"(220mm) was specified. According to this pipe diameter,
a room ventilation opening with a size of 37'4"(1,140cm) is required. The edge length is
1413/16"(377mm) (see Table3).
For example3
Since in this case the tumble dryer is connected to a central air supply, additional ventila-
tion openings are not needed.

Gas
14
Take these safety precautions if you smell gas
– Extinguish all flames immediately.
– Open all windows and doors immediately.
– Close the gas shut-off device on the gas meter or the main gas shut-off device immedi-
ately.
– If there is the smell of gas in a room, never enter the room with a naked flame.
– Do not light matches or lighters.
– Do not smoke.
– Do not carry out any actions that will create electrical sparks (such as pulling out electri-
cal plugs or pressing electrical switches or bells).
– Close the gas shut-off valve installed on site.
– If you cannot find the cause of the gas smell and all gas valves have been shut off,
please call the gas supply company immediately.
– If other persons are being shown how to operate the appliance, they must be given and/
or made aware of these important safety instructions.
During installation, the technical regulations for gas installations as well as national and
regional building regulations, fire regulations, and specifications from the relevant gas
supply companies must be adhered to.
When planning a gas-heated system, contact the relevant gas supply company and a
building regulations inspector in good time.
1. What needs to be observed before commissioning
Please specify the gas family, gas group, and connection pressure.
Installation site
Gas-heated tumble dryers must not be operated in a room where cleaning machines oper-
ate with solvents containing perchloroethylene or CFCs. During combustion, any vapors
that are emitted will break down into hydrochloric acid, leading to consequential damage
affecting laundry and the appliance. Air exchange must not take place if appliances are set
up in separate rooms.
Rooms with fuel-burning installations must be adequately aerated and ventilated. Any gas-
heated appliance must be considered to be a fuel-burning installation (regardless of its gas
flow rate).
If liquid gas-heated appliances are being set up below ground level, the operator must pro-
vide the system with the necessary aeration and induced ventilation equipment in accor-
dance with technical regulations for liquid gas.
If no low pressure occurs when a full fire is burning in all fuel-burning installations, this
means that the room ventilation is working properly, even if the exhaust gases from the in-
stallations are being extracted mechanically. This ensures that the gas is being combusted
correctly and that the exhaust gases are being evacuated completely.
It must not be possible to seal off aeration and ventilation openings.

Gas
15
Before completing commissioning, maintenance, conversion, and repair work, all
gas-conducting components – from the manual shut-off valve to the burner jet – must
be checked for leaks.
Particular attention must be paid to the measuring stubs on the gas valve. Checks must
be performed when the burner is both switched on and switched off.
 Installing thermal shut-off equipment on site is recommended.
 If gas-heated appliances are accessible to anyone, it is also necessary to check whether
a gas flow monitor needs to be used.
Gas supply
Required flow rate
Appliance type Rated heat load (Hi) Natural gas (LL) Natural gas (E) Liquid gas
PT825x 15kW 1.85m³/h 1.59m³/h 1.18kg/h
PT830xSL
PT833x 18kW 2.22m³/h 1.90m³/h 1.42kg/h
PT840x 21.5kW 2.65m³/h 2.28m³/h 1.70kg/h
PT850x 30kW 3.69m³/h 3.17m³/h 2.37kg/h
PT880x 36kW 4.43m³/h 3.81m³/h 2.84kg/h
Table1
The connected load is based on the following consumption calorific values:
Natural gas LL (G25): 29.25MJ/m³ (Hi)
Natural gas E (G20): 34.02MJ/m³ (Hi)
Liquid gas (G30): 45.65MJ/kg (Hi)
Natural gas
Natural gas Length of gas line
9' 10" (3 m) 15" (5 m) 32' 9 11/16" (10 m) 65' 7 3/8" (20 m) 98' 5 1/8" (30 m) 164' 1/2" (50 m) 328' 1" (100 m)
Internal
diameter Maximum flow rate
¾" (20 mm) 4.7 m³/h 3.7 m³/h 2.6 m³/h 1.6 m³/h 1.1 m³/h 0.7 m³/h 0.3 m³/h
1" (25 mm) 8.6 m³/h 6.9 m³/h 4.8 m³/h 3.1 m³/h 2.4 m³/h 1.9 m³/h 0.9 m³/h
1 ¼" (32 mm) 16.0 m³/h 12.4 m³/h 8.7 m³/h 6.2 m³/h 5.0 m³/h 3.8 m³/h 2.4 m³/h
1 ½" (40 mm) 26.5 m³/h 20.5 m³/h 14.5 m³/h 10.3 m³/h 8.4 m³/h 6.5 m³/h 4.0 m³/h
2" (50 mm) 60.0 m³/h 47.0 m³/h 33.0 m³/h 23.0 m³/h 19.0 m³/h 15.0 m³/h 10.0 m³/h
Table2

Gas
16
Propane (LP)
Propane (LP) Length of gas line
15" (5 m) 32' 9 11/16" (10 m) 65' 7 3/8" (20 m) 164' 1/2" (50 m)
Internal
diameter
Maximum flow rate
3/8" (10 mm) 1.3 kg/h 1.0 kg/h - -
1/2" (12 mm) 2.0 kg/h 1.5 kg/h 1.0 kg/h -
5/8" (16 mm) 4.0 kg/h 3.0 kg/h 2.0 kg/h 1.5 kg/h
7/8" (22 mm) 9.0 kg/h 6.5 kg/h 4.5 kg/h 3.0 kg/h
1 1/16" (27 mm) - 12.0 kg/h 8.0 kg/h 5.0 kg/h
Table3
Exhaust gas evacuation ducts
The PT825x/830xSL/833x/840x/850x/880x series tumble dryers are type B22 gas fuel-
burning installations without flow safeguarding equipment, and with a fan behind the
heater.
– The mixtures of exhaust gas and air that are emitted by gas-heated tumble dryers must
be evacuated through a suitable chimney and out into the atmosphere via the roof.
– Exhaust air/gas evacuation ducts must be kept as short as possible and must rise verti-
cally up to the vent flue.
– Only materials that are resistant to heat and sooting may be used.
– A condensate drain must be placed at the lowest point of the exhaust air/exhaust gas
line. The condensate must be drained via a water collection tray or a floor drain posi-
tioned in an appropriate location. Supports and louvres must not be fitted. The exhaust
air/exhaust gas line must be installed in a way that ensures it is leak-tight.
See the guidelines for approving exhaust gas systems containing low-temperature exhaust
gases (issued by the German Institute for Structural Engineering in Berlin).
Exceptions
1. Where it is not possible for evacuation to take place through a single duct, appropri-
ate measures must be put in place to ensure that, when an appliance is being oper-
ated, the exhaust gas/air mixture from the other appliances is not able to enter the
setup room (for example, baffles and merged lines with a shape that is favorable for
the flow; in this case it is important to ensure that high pressure cannot arise at the
side that is not being operated). Appliances fitted with fans must not be connected to
the same vent flue as those without fans.
2. When installing a combined line, the exhaust air evacuation ducts for the individual
appliances must be installed horizontally in the combined line, in a way that is favor-
able for the flow. The cross-section of the vent flue must not be smaller than the
cross-section of the combined line. Combined lines must be kept as short as possi-
ble and must rise vertically up to the vent flue. A condensate drain must be placed at
the lowest point. The condensate must be drained as described above.

Gas
17
All exceptional cases, and particularly those where a combined line is being installed, re-
quire special permission from the relevant building regulations inspector supervisor’s of-
fice.
Local codes must be observed.
Exhaust air and supply air line cross-sections
Tumble dryer Exhaust gas connection
Diameter/cross-section
PT825x, PT830xSL, PT833x, PT840x, PT880x 6"/271/4"²(150mm/176cm²)
Table4
2. What needs to be observed during commissioning
Check that the points listed in section 1 (“What needs to be observed before commission-
ing”) have been taken into consideration. The following should be carried out in the given
order when commissioning or converting the appliance:
1. Ask the gas supply company what the gas family, gas group, and connection pres-
sure are, and compare this information with the data specified on the tumble dryer
(see the sticker at the rear).
2. Check the factory-set jet pressure based on Table6/7 and correct it if necessary.
3. If the gas family, gas group, or connection pressure is different, it must be converted
as instructed in the section entitled “Connection and conversion instructions” and the
sticker at the rear of the tumble dryer must be replaced accordingly.
4. If the gas family needs to be changed, please request the appropriate conversion kit
from Miele Service. When doing so, please specify the product name and the appli-
ance number, as well as the gas family, gas group, gas connection pressure, and
country where the appliance has been set up.
5. Set the jet pressure at the tumble dryer’s gas regulating valve (see Table6 and Ta-
ble7).
6. Switch on all gas consumers that are present (including the installed tumble dryer).
7. Measure the connection pressure. The connection pressure must be within the
ranges specified in EN437.
Connection and conversion instructions
Connection and conversion work must be performed by Miele Technical Service or by
an authorized dealer.
The settings for tumble dryers are made at the factory in line with the gas specifications at
the rear of the appliance.
Gas hose
The gas appliance must be connected using a corrugated metal hose assembly made from
stainless steel. When selecting the hose, the required flow rate must be taken into account.
All hoses used with this appliance must comply with all current codes and regulations.

Gas
18
Main connection PT830xSL
Natural gas Liquid gas
Hose
Threaded union
Reducing nipple Hose
Gas regulator valve PT830xSL
Connection pressure
measuring stub
Head screw
Spring
Adjusting screw
Jet
Jet pressure
measuring stub
Jet pressure adjustment
Unscrew the head screw.
Adjust the jet pressure with the adjusting screw (see Table6 for natural gas and Table7
for liquid gas).
Reinstall the head screw.
Burner conversion
Replace the jet and the sealing ring (included with the conversion kit).
– Natural gas = large hole
– Liquid gas = small hole
Replace the sticker on the rear of the appliance (included with the conversion kit).

Gas
19
Gas lines and screw connections may leak after connection and conversion work.
Gas may escape.
After connection and conversion work, the gas lines, all screw connections (including
those on the jets), and the locking bolts on the measuring stubs must be checked to en-
sure they are leak-tight. This check must be performed both while the appliance is at a
standstill and while it is in operation.
Main connection PT825x, PT833x, PT840x, PT850x, PT880x
Propane (LP)Natural gas
Hose
Reduction sleeve*
Threaded union*
* Supplied with the kit for converting natural gas to propane (LP).

Gas
20
Gas regulator valve PT825x, PT833x, PT840x, PT850x, PT880x
Special tool
Cap
Screw
Nut
Plug
Connection pressure
measuring stub
Pressure regulator
Jet pressure
measuring stub
Jet pressure adjustment
Only the special tool may be used for adjustment via the pressure regulator.
Loosen the locking bolts of the connection pressure and jet pressure measuring stub.
Loosen the locking bolt of the jet pressure measuring stub.
Check the connection pressure and jet pressure.
Remove the cap from the pressure regulator.
Fit the special tool to the nut of the pressure regulator.
Setting maximum pressure at full heating
Values for natural gas: see Table6; values for liquid gas: see Table7
To increase the maximum jet pressure, turn the lower ring on the special tool in a clock-
wise direction.
The nut of the pressure regulator is tightened by the special tool.
To reduce the maximum jet pressure, turn the lower ring on the special tool in a counter-
clockwise direction.
The nut of the pressure regulator is loosened by the special tool.
Adjusting the minimum pressure with power supply interrupted
Pull out the plug.
Hold the lower ring of the special tool steady and carry out the following steps.
The nut is held secure by the special tool.