Viessmann Vitomax HS Series User manual

Installation instructions
for contractors
Viesmann
Vitomax HS
Type M73
Type M75
Type M93
Type M95
High pressure steam boiler
VITOMAX HS
5837986 GB 7/2019

2
Please follow these safety instructions closely to
prevent accidents and material losses.
Safety instructions explained
Danger
This symbol warns against the risk of injury.
!Please note
This symbol warns against the risk of material
losses and environmental pollution.
Note
Details identified by the word "Note" contain additional
information.
Target group
These instructions are exclusively intended for quali-
fied contractors.
■Work on gas installations must only be carried out by
a registered gas fitter.
■Work on electrical equipment may only be carried
out by a qualified electrician.
■The commissioning must only be carried out by
trained specialist personnel in accordance with the
Viessmann operating and service instructions.
Regulations to be observed
■Pressure Equipment Directive
■Health and Safety at Work Act (BetrSichV) [Ger-
many] and extended technical rules for operational
safety (TRBS)
■Country-specific safety regulations for the installation
site
■National installation regulations
■Statutory regulations for the prevention of accidents
■Statutory regulations for environmental protection
■Codes of practice of the relevant trade associations
Working on the system
■Close the fuel shut-off valve and secure against
unintentional reopening.
■Isolate the system from the power supply, e.g. at a
separate MCB/fuse or a mains isolator, and check
that it is no longer live.
■Safeguard the system against reconnection.
!Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Prior to commencing any work on the system,
touch earthed objects, such as heating or water
pipes to discharge static loads.
Repair work
!Please note
Repairing components that fulfil a safety func-
tion can compromise the safe operation of the
system.
Replace faulty components only with genuine
Viessmann spare parts.
Safety instructions
5837986

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1. Installation information Preparing for installation ........................................................................ 4
■Symbols .............................................................................................. 4
■Intended use ....................................................................................... 5
■Storing Viessmann shell boilers .......................................................... 5
■Transporting a shell boiler .................................................................. 6
2. Installation sequence Handling and levelling the boiler ............................................................ 7
■Recommended minimum clearances ................................................. 7
Overview of boiler equipment ................................................................ 9
Boiler connections ................................................................................. 10
Installing the pipework ........................................................................... 14
Fitting measuring and control equipment (optional accessories) .......... 14
■Mounting the fitting assembly ............................................................. 15
■Fitting the electrodes for the water level controller and water level
limiter .................................................................................................. 15
Connections on the flue gas side ........................................................... 19
■Fitting the flue gas hood to the ECO (if included and delivered sepa-
rately) .................................................................................................. 19
■Mounting the flue pipe ........................................................................ 19
Fitting the sight glass ............................................................................. 21
Installing the burner ............................................................................... 21
■Preparing the burner connection ........................................................ 21
■Fitting the burner plate (if delivered separately) ................................. 21
Commissioning and adjustment ............................................................. 22
Index
5837986

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Symbols
Symbol Meaning
Reference to other document containing
further information
1.
Step in a diagram:
The numbers correspond to the order in
which the steps are carried out.
Warning of material losses and environ-
mental pollution
Live electrical area
Pay particular attention.
■Component must audibly click into place.
or
■Acoustic signal
■Fit new component.
or
■In conjunction with a tool: Clean the sur-
face.
Dispose of component correctly.
Dispose of component at a suitable collec-
tion point. Do not dispose of component in
domestic waste.
The steps in connection with commissioning, inspec-
tion and maintenance are found in the "Commission-
ing, inspection and maintenance" section and identified
as follows:
Symbol Meaning
Steps required during commissioning
Not required during commissioning
Steps required during inspection
Not required during inspection
Steps required during maintenance
Not required during maintenance
Note
All diagrams in this document are schematic, illustra-
tive examples.
Designation of boiler types
With the boiler type, the respective stage of develop-
ment is indicated in capital letters.
Example M93B: Boiler type M93B version B
Preparing for installation
5837986

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Intended use
The appliance is intended solely for installation and
operation in sealed unvented heating systems, with
due attention paid to the associated installation, serv-
ice and operating instructions. The appliance is inten-
ded exclusively for steam generation and for heating
water in accordance with EN 12953 and AGFW data-
sheet FW510 (VdTÜV datasheet TCh 1466).
Commercial or industrial use for a purpose other than
steam generation or the heating of water shall be
deemed inappropriate.
All other use is deemed inappropriate. Any resulting
losses are excluded from the manufacturer's liability.
Any usage beyond this must be approved by the man-
ufacturer in each individual case.
Intended use presupposes that a permanent installa-
tion in conjunction with permissible components
designed for this purpose has been carried out.
Intended use also includes adherence to maintenance
and inspection intervals.
Storing Viessmann shell boilers
Recommendation for corrosion prevention
Please follow all instructions carefully.
Applicability of instructions
Storage of boilers until system installation.
General
■Store Viessmann shell boilers in closed rooms, pro-
tected from weather influences and under dry condi-
tions.
■The room temperature must not fall below 0 °C or
exceed 50 °C.
■Viessmann shell boilers are delivered equipped with
blank flanges or protective caps on the water side,
for protection against the ingress of foreign bodies.
■To prevent the formation of condensate on the boiler:
–Remove the transport packaging after delivery or
–Protect the boiler against moisture by using a des-
iccant.
Storage period > 4 weeks
■Protect the interior of the shell boiler against mois-
ture. Use a desiccant, e.g. silica gel, on the flue gas
and water side.
■Use the appropriate amount of desiccant for the vol-
ume of the boiler.
Note
Observe the desiccant manufacturer's instructions.
■Check the effectiveness of the desiccant at regular
intervals.
■Ensure that the desiccant does not come into contact
with the boiler material.
Recommendation
Fill suitable containers with desiccant. Suspend the
containers in the boiler body.
■Instead of extracting the moisture on the flue gas
side by means of a desiccant, a dryer with air circula-
tion can also be used.
■Coat the dry flue gas side of the shell boiler with a
thin film of graphite or varnish.
Preparing for installation (cont.)
5837986

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Transporting a shell boiler
Danger
Inappropriate handling of the boiler may lead to
accidents. There is a risk of injury.
Only use the fixing points provided to transport
the boiler. Observe all the applicable regulations
on accident prevention.
F1/2 F1/2
90°
>45°
A
B
C
Fig. 1 Options for attaching lifting gear
A, BHoles for load handling equipment (7 80 mm)
CBase rail (bearing points on boiler base)
1. Attach lifting gear to lifting eyes A of the boiler. 2. Move the boiler.
■Place steel rollers underneath bearing points C.
■Secure traction mechanism to holes for load han-
dling equipment B (7 80 mm).
Preparing for installation (cont.)
5837986

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Recommended minimum clearances
c
x1
f
½y1
d
e
a
C
D
A B
b
y1
g
Fig. 2
ABoiler
BBurner
CControl system and control panel
DAnti-vibration boiler supports
a Control panel not fitted
b Control panel depth
c Control panel fitted
d, e, f, g Other clearances
x1, y1 See tables of dimensions: Max. length, max.
width
a mm ≥1000
b mm Subject to the selected control
panel
c mm ≥800
d mm ≥500
e mm ≥300
f mm ≥500
g mm See recommendation: Approx. x1
Tab. 1
Recommendation for dimension g
Leave one boiler length (x1) of space in front of the
boiler door to extract the turbulators (if fitted) and for
cleaning.
Observe the stated dimensions to ensure straightfor-
ward installation and maintenance.
Observe the clearances with regard to the regulations
applicable at the installation site. Allow for equipment
and accessories.
The installation surface must be level. Level the boiler
horizontally.
Type M73B
Boiler size*1 1 2
x1
■With ECO 2 mm 2756 2916
■With ECO 1 mm 2756 2916
■Without ECO mm 2556 2707
y1 mm 1575 1655
Tab. 2
Type M73C
Boiler size*1 3 4 5 6 7 8 9
x1
■With ECO 2 mm 3330 3530 3750 3945 4260 4525 4810
■With ECO 1 mm 3330 3530 3750 3945 4260 4525 4810
■Without ECO mm 3160 3360 3580 3775 4015 4280 4565
y1 mm 1725 1775 1850 1900 1975 2100 2200
Tab. 3
Type M75C
Boiler size*1 1 2 3 4 5 6 7 8
x1
■With ECO 2 mm 5150 5550 5775 6000 6415 6915 7295 7670
■With ECO 1 mm 5150 5550 5775 6000 6415 6915 7295 7670
*1 Last digit of type designation
Handling and levelling the boiler
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Boiler size*1 1 2 3 4 5 6 7 8
■Without ECO mm 4955 5205 5480 5705 6170 6520 6950 7325
y1 mm 2400 2475 2525 2625 2800 2900 3000 3150
Tab. 4
Type M75C - continued
Boiler size*1 9 A B C D E F G
x1
■With ECO 2 mm 8095 8400 8850 9165 9465 9930 10180 10380
■With ECO 1 mm 8095 8400 8850 9165 9465 9930 10180 10380
■Without ECO mm 7600 7955 8255 8620 8920 9235 9485 9735
y1 mm 3275 3375 3450 3550 3625 3725 3800 3850
Tab. 5
Type M93B
Boiler size*1 3 4 5 6 7 8 9
x1
■With ECO 2 mm 3330 3530 3750 3945 4260 4525 4810
■With ECO 1 mm 3330 3530 3750 3945 4260 4525 4810
■Without ECO mm 3160 3360 3580 3775 4015 4280 4565
y1 mm 1825 1875 1975 2025 2100 2200 2300
Tab. 6
Type M95B
Boiler size*1 1 2 3 4 5 6 7 8
x1
■With ECO 2 mm 5150 5550 5775 6000 6415 6915 7295 7670
■With ECO 1 mm 5150 5550 5775 6000 6415 6915 7295 7670
■Without ECO mm 4955 5205 5480 5705 6170 6520 6950 7325
y1 mm 2475 2600 2675 2750 2925 3050 3175 3325
Tab. 7
Type M95B - continued
Boiler size*1 9 A B C D E F G
x1
■With ECO 2 mm 8095 8400 8850 9165 9465 9930 10180 10380
■With ECO 1 mm 8095 8400 8850 9165 9465 9930 10180 10380
■Without ECO mm 7600 7955 8255 8620 8920 9235 9485 9735
y1 mm 3400 3475 3575 3650 3725 3800 3850 3900
Tab. 8
Anti-vibration supports
Recommendation
Use to provide vibration isolation and minimise trans-
mission of structure-borne noise.
Installation of anti-vibration supports
Manufacturer's installation instructions
*1 Last digit of type designation
Handling and levelling the boiler (cont.)
5837986

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A
Z
O
C
rR
1
rZ
Z
AO
C
6 2 wTwZ
rT
4
3wP
wUwI
wWwQqQqW
rE
qPqW
rW rQ
rR
qT
wR
wE
rP
Fig. 3 Standard delivery may vary subject to order.
1Boiler control platform with conductor (optional)
2Control panel (see separate documentation)
3Integrated ECO (optional)
4ECO – boiler connection line
6Burner
qP Level electrode (WLC: Water level controller)
qQ Level electrode (HWL: Highest water level)
qW Level electrode (LWL: Lowest water level)
qT Conductivity electrode
wP Safety valve*2
wQ Air vent shut-off valve (optional)
wW Steam shut-off valve
wE Feedwater shut-off valve
wR Feedwater check valve
wT Blow-down shut-off valve
wZ Blow-down valve
wU Desalination shut-off valve
wI Desalination control valve
rP Water level indicator*2
rQ Pressure gauge
rW Maximum pressure limiter
rE Pressure transducer
rR Straight-through shut-off valve with cap (optional)
rT Temperature indicator for feedwater
rZ Sample cooler
Note
The illustration of the fitting assembly applies to modu-
lating operation. For staged operation, provide the
required number of pressure regulators in place of the
pressure transducer (see page 15).
*2 Quantity is country-specific
Overview of boiler equipment
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Type M73B
Boiler size 1 2
Steam connector
For permiss. operating pressure (PS*3)6 bar PN 16 DN 65 65
8 bar PN 16 DN 50 65
10 bar PN 16 DN ―50
10 bar PN 40 DN 40 ―
13 bar PN 40 DN 32 40
16 bar PN 40 DN 32 40
18 bar PN 40 DN 32 32
20 bar PN 40 DN 32 32
22 bar PN 40 DN 32 32
25 bar PN 40 DN 32 32
Safety valve
For permiss. operating pressure (PS) 6 bar PN 40 DN 20 20
8 bar PN 40 DN 20 20
10 bar PN 40 DN 20 20
13 bar PN 40 DN 20 20
16 bar PN 40 DN 20 20
18 bar PN 40 DN 20 20
20 bar PN 40 DN 20 20
22 bar PN 40 DN 20 20
25 bar PN 40 DN 20 20
Feedwater connector PN 40 DN 25 25
Type M73C
Boiler size 3 4 5 6 7 8 9
Steam connector
For permiss. operating
pressure (PS)
6 bar PN 16 DN 80 100 100 125 125 150 150
8 bar PN 16 DN 65 80 100 100 100 125 150
10 bar PN 16 DN 65 65 80 80 100 125 125
13 bar PN 40 DN 50 65 65 80 80 100 100
16 bar PN 40 DN 50 50 65 65 80 80 100
18 bar PN 40 DN 50 50 65 65 65 80 100
20 bar PN 40 DN 40 50 50 65 65 80 80
22 bar PN 40 DN 40 50 50 65 65 65 80
25 bar PN 40 DN 32 40 50 50 65 65 80
Safety valve
For permiss. operating
pressure (PS)
6 bar PN 40 DN 25 32 32 40 40 50 50
8 bar PN 40 DN 25 25 32 32 40 40 50
10 bar PN 40 DN 20 25 25 32 32 40 40
13 bar PN 40 DN 20 20 25 25 32 32 40
16 bar PN 40 DN 20 20 20 25 25 32 32
18 bar PN 40 DN 20 20 20 20 25 32 32
20 bar PN 40 DN 20 20 20 20 25 25 32
22 bar PN 40 DN 20 20 20 20 25 25 32
*3 PS = maximum permissible operating pressure as defined in the Pressure Equipment Directive
Boiler connections
5837986

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Boiler size 3 4 5 6 7 8 9
25 bar PN 40 DN 20 20 20 20 20 25 25
Feedwater connector PN 40 DN 32 32 32 32 32 32 32
Type M75C
Boiler size 1 2 3 4 5 6 7 8
Steam connector
For permiss. operat-
ing pressure (PS) 6 bar PN 16 DN 200 200 200 250 250 250 300 300
8 bar PN 16 DN 150 200 200 200 200 250 250 250
10 bar PN 16 DN 125 150 150 200 200 200 250 250
10 bar PN 40 DN ― ― ― ― ― ― ― ―
13 bar PN 40 DN 125 125 150 150 ― ― ― ―
13 bar PN 25 DN ― ― ― ― 200 200 200 200
16 bar PN 40 DN 100 125 125 125 150 ― ― ―
16 bar PN 25 DN ― ― ― ― ― 200 200 200
18 bar PN 40 DN 100 125 125 125 150 150 ― ―
18 bar PN 25 DN ― ― ― ― ― ― 200 200
20 bar PN 40 DN 100 100 125 125 125 150 150 200
22 bar PN 40 DN 100 100 100 125 125 150 150 150
25 bar PN 40 DN 80 100 100 100 125 125 150 150
Safety valve
For permiss. operat-
ing pressure (PS) 6 bar PN 40 DN 65 65 65 80 80 100 100 100
8 bar PN 40 DN 50 65 65 65 65 80 80 100
10 bar PN 40 DN 50 50 50 65 65 65 80 80
13 bar PN 40 DN 40 50 50 50 65 65 65 80
16 bar PN 40 DN 40 40 40 50 50 65 65 65
18 bar PN 40 DN 32 40 40 40 50 50 65 65
20 bar PN 40 DN 32 40 40 40 50 50 65 65
22 bar PN 40 DN 32 32 40 40 50 50 50 65
25 bar PN 40 DN 32 32 32 40 40 50 50 50
Feedwater connector PN 40 DN 40 40 40 50 50 50 65 65
Type M75C - continued
Boiler size 9 A B C D E F G
Steam connector
For permiss. operat-
ing pressure (PS) 6 bar PN 16 DN 350 350 400 400 400 450 450 450
8 bar PN 16 DN 300 300 300 350 350 400 400 400
10 bar PN 16 DN 250 250 300 300 300 300 350 350
10 bar PN 40 DN ― ― ― ― ― ― ― ―
13 bar PN 40 DN ― ― ― ― ― ― ― ―
13 bar PN 25 DN 250 250 250 250 250 300 300 300
16 bar PN 40 DN ― ― ― ― ― ― ― ―
16 bar PN 25 DN 200 200 250 250 250 250 250 250
18 bar PN 40 DN ― ― ― ― ― ― ― ―
18 bar PN 25 DN 200 200 200 200 250 250 250 250
20 bar PN 40 DN 200 200 200 200 200 250 250 ―
Boiler connections (cont.)
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Boiler size 9 A B C D E F G
22 bar PN 40 DN 200 200 200 200 200 ― ― ―
25 bar PN 40 DN 150 200 ― ― ― ― ― ―
Safety valve
For permiss. operat-
ing pressure (PS) 6 bar PN 40 DN 100 125 125 125 150 150 150 150
8 bar PN 40 DN 100 100 100 125 125 125 125 150
10 bar PN 40 DN 80 100 100 100 100 100 125 125
13 bar PN 40 DN 80 80 80 100 100 100 100 100
16 bar PN 40 DN 65 80 80 80 80 80 100 100
18 bar PN 40 DN 65 65 80 80 80 80 80 80
20 bar PN 40 DN 65 65 65 80 80 80 80 ―
22 bar PN 40 DN 65 65 65 65 80 ― ― ―
25 bar PN 40 DN 65 65 ― ― ― ― ― ―
Feedwater connector PN 40 DN 65 65 65 80 80 80 80 80
Type M93B
Boiler size 3 4 5 6 7 8 9
Steam connector
For permiss. operating
pressure (PS)
6 bar PN 16 DN 80 100 100 125 125 150 150
8 bar PN 16 DN 65 80 100 100 100 125 150
10 bar PN 16 DN 65 65 80 80 100 125 125
13 bar PN 40 DN 50 65 65 80 80 100 100
16 bar PN 40 DN 50 50 65 65 80 80 100
18 bar PN 40 DN 50 50 65 65 65 80 100
20 bar PN 40 DN 40 50 50 65 65 80 80
22 bar PN 40 DN 40 50 50 65 65 65 80
25 bar PN 40 DN 32 40 50 50 65 65 80
Safety valve
For permiss. operating
pressure (PS)
6 bar PN 40 DN 25 32 32 40 40 50 50
8 bar PN 40 DN 25 25 32 32 40 40 50
10 bar PN 40 DN 20 25 25 32 32 40 40
13 bar PN 40 DN 20 20 25 25 32 32 40
16 bar PN 40 DN 20 20 20 25 25 32 32
18 bar PN 40 DN 20 20 20 20 25 32 32
20 bar PN 40 DN 20 20 20 20 25 25 32
22 bar PN 40 DN 20 20 20 20 25 25 32
25 bar PN 40 DN 20 20 20 20 20 25 25
Feedwater connector PN 40 DN 32 32 32 32 32 32 32
Type M95B
Boiler size 1 2 3 4 5 6 7 8
Steam connector
For permiss. operat-
ing pressure (PS*3) 6 bar PN 16 DN 200 200 200 250 250 250 300 300
8 bar PN 16 DN 150 200 200 200 200 250 250 250
10 bar PN 16 DN 125 150 150 200 200 200 250 250
*3 PS = maximum permissible operating pressure as defined in the Pressure Equipment Directive
Boiler connections (cont.)
5837986

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Boiler size 1 2 3 4 5 6 7 8
10 bar PN 40 DN ― ― ― ― ― ― ― ―
13 bar PN 40 DN 125 125 150 150 ― ― ― ―
13 bar PN 25 DN ― ― ― ― 200 200 200 200
16 bar PN 40 DN 100 125 125 125 150 ― ― ―
16 bar PN 25 DN ― ― ― ― ― 200 200 200
18 bar PN 40 DN 100 125 125 125 150 150 ― ―
18 bar PN 25 DN ― ― ― ― ― ― 200 200
20 bar PN 40 DN 100 100 125 125 125 150 150 200
22 bar PN 40 DN 100 100 100 125 125 150 150 150
25 bar PN 40 DN 80 100 100 100 125 125 150 ―
Safety valve
For permiss. operat-
ing pressure (PS) 6 bar PN 40 DN 65 65 65 80 80 100 100 100
8 bar PN 40 DN 50 65 65 65 65 80 80 100
10 bar PN 40 DN 50 50 50 65 65 65 80 80
13 bar PN 40 DN 40 50 50 50 65 65 65 80
16 bar PN 40 DN 40 40 40 50 50 65 65 65
18 bar PN 40 DN 32 40 40 40 50 50 65 65
20 bar PN 40 DN 32 40 40 40 50 50 65 65
22 bar PN 40 DN 32 32 40 40 50 50 50 65
25 bar PN 40 DN 32 32 32 40 40 50 50 ―
Feedwater connector PN 40 DN 40 40 40 50 50 50 65 65
Type M95B - continued
Boiler size 9 A B C D E F G
Steam connector
For permiss. operat-
ing pressure (PS*3) 6 bar PN 16 DN 350 350 400 400 400 450 450 450
8 bar PN 16 DN 300 300 300 350 350 400 400 400
10 bar PN 16 DN 250 250 300 300 300 300 350 350
10 bar PN 40 DN ― ― ― ― ― ― ― ―
13 bar PN 40 DN ― ― ― ― ― ― ― ―
13 bar PN 25 DN 250 250 250 250 250 300 300 300
16 bar PN 40 DN ― ― ― ― ― ― ― ―
16 bar PN 25 DN 200 200 250 250 250 250 250 250
18 bar PN 40 DN ― ― ― ― ― ― ― ―
18 bar PN 25 DN 200 200 200 200 250 250 250 ―
20 bar PN 40 DN 200 200 200 200 200 250 ― ―
22 bar PN 40 DN 200 200 ― ― ― ― ― ―
25 bar PN 40 DN ― ― ― ― ― ― ― ―
Safety valve
For permiss. operat-
ing pressure (PS) 6 bar PN 40 DN 100 125 125 125 150 150 150 150
8 bar PN 40 DN 100 100 100 125 125 125 125 150
10 bar PN 40 DN 80 100 100 100 100 100 125 125
13 bar PN 40 DN 80 80 80 100 100 100 100 100
16 bar PN 40 DN 65 80 80 80 80 80 100 100
*3 PS = maximum permissible operating pressure as defined in the Pressure Equipment Directive
Boiler connections (cont.)
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Boiler size 9 A B C D E F G
18 bar PN 40 DN 65 65 80 80 80 80 80 ―
20 bar PN 40 DN 65 65 65 80 80 80 ― ―
22 bar PN 40 DN 65 65 ― ― ― ― ― ―
25 bar PN 40 DN ― ― ― ― ― ― ― ―
Feedwater connector PN 40 DN 65 65 65 80 80 80 80 80
Installing the pipework
Danger
Risk of injury when opening pressurised boiler
flue connections.
Do not open boiler flue connections until they
are depressurised and have cooled down.
1. Thoroughly flush the system (especially when con-
necting the boiler to an existing system).
2. Connect pipework free of load and torque stress.
Note
Install all pipe connections free of load and torque
stress.
If an ECO is installed:
1. Install a connection line between the outlet connec-
tor on the ECO and the feedwater connector on the
boiler.
2. Insulate the connection line with the thermal insula-
tion provided.
3. Fit the thermometer to the connection line.
Note
The connection line may already have been fitted
at the factory.
Fitting measuring and control equipment (optional accessories)
Criteria for selecting measuring and control equipment:
■Boiler operating pressure
■Type of boiler operation:
–With constant supervision
–Without constant supervision
Installing the equipment
Manufacturer's installation instructions
Electrical connection of equipment
Connection and wiring diagram
Boiler connections (cont.)
5837986

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Mounting the fitting assembly
D
CA B
E
Fig. 4
ARequired number of pressure regulators or pres-
sure transducers (optionally with cap valve)
B1 pressure gauge with test valve and 1 drain valve
C1 safety pressure limiter (max.) (optionally with cap
valve)
D1 additional connection
EFitting assembly connection pipe
Note
Fill U-bend E with water before attaching it to the con-
nector for the fitting assembly.
Fitting the electrodes for the water level controller and water level limiter
Connector for water level limiter
a
d
Fig. 5
AHigh water level limiter electrode
BLow water level limiter electrode
CLowest water level (LWL)
DWater level control electrode
Note:
■Adjust and set the electrodes to the switching points
listed in tables 8 – 10.
■With multi boiler systems, ensure the electrodes are
not interchanged.
■Only fit one low water level limiter electrode each in
the connectors for the water level controller and lim-
iter.
Fitting measuring and control equipment… (cont.)
5837986

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Connector for water level controller and limiter
a
b
c
d
Fig. 6
a Reference electrode to lowest water level (LWL)
b Pump on
c Pump off
d Highest water level (HWL)
The water level controller and limiter may be com-
bined.
Installation instructions for the water level con-
troller and limiter electrodes
Note
Check the supplied electrodes for correct dimensions
according to the table. Adjust if necessary.
Type M73B – Electrode switching points for boilers with WSA-ME*4 = 360 mm
Boiler size 1 2
6 to 13 bar
Switching point a mm 482 507
b mm 442 467
c mm 402 427
d mm 337 362
16 to 25 bar
Switching point a mm 472 497
b mm 432 457
c mm 392 417
d mm 327 352
Tab. 9
*4 WSA-ME = Water level indicator centre-to-centre distance
Fitting measuring and control equipment… (cont.)
5837986

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Type M73C – Electrode switching points for boilers with WSA-ME*4 = 360 mm
Boiler size 3 4 5 6 7 8 9
6 to 13 bar
Switching point a mm 490 515 527 541 565 597 604
b mm 450 475 487 501 525 557 564
c mm 410 435 447 461 485 517 524
d mm 345 370 382 396 420 452 459
16 to 25 bar
Switching point a mm 480 505 517 531 555 587 594
b mm 440 465 477 491 515 547 554
c mm 400 425 437 451 475 507 514
d mm 335 360 372 386 410 442 449
Tab. 10
Type M75C – Electrode switching points for boilers with WSA-ME*4 = 400 mm
Boiler size 1 2 3 4 5 6 7 8
6 to 13 bar
Switching point a mm 719 717 725 767 792 802 812 827
b mm 679 677 685 727 752 762 772 787
c mm 619 617 625 667 692 702 712 727
d mm 534 532 540 582 607 617 627 642
16 to 25 bar
Switching point a mm 709 707 715 757 782 792 802 817
b mm 669 667 675 717 742 752 762 777
c mm 609 607 615 657 682 692 702 717
d mm 524 522 530 572 597 607 617 632
Tab. 11
Type M75C - continued
Boiler size 9 A B C D E F G
6 to 13 bar
Switching point a mm 892 892 907 912 897 907 917 915
b mm 852 852 867 872 857 867 877 875
c mm 792 792 807 812 797 807 817 815
d mm 707 707 722 727 712 722 732 730
16 to 25 bar
Switching point a mm 882 882 897 902 887 897 907 905
b mm 842 842 857 862 847 857 867 865
c mm 782 782 797 802 787 797 807 805
d mm 697 697 712 717 702 712 722 720
Tab. 12
*4 WSA-ME = Water level indicator centre-to-centre distance
Fitting measuring and control equipment… (cont.)
5837986

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Type M93B – Electrode switching points for boilers with WSA-ME*4 = 360 mm
Boiler size 3 4 5 6 7 8 9
6 to 13 bar
Switching point a mm 495 508 539 562 559 579 604
b mm 455 468 499 522 519 539 564
c mm 415 428 459 482 479 499 524
d mm 350 363 394 417 414 434 459
16 to 25 bar
Switching point a mm 485 498 529 552 549 569 594
b mm 445 458 489 512 509 529 554
c mm 405 418 449 472 469 489 514
d mm 340 353 384 407 404 424 449
Tab. 13
Type M95B – Electrode switching points for boilers with WSA-ME*4 = 400 mm
Boiler size 1 2 3 4 5 6 7 8
6 to 13 bar
Switching point a mm 682 712 727 742 777 782 812 850
b mm 642 672 687 702 737 742 772 810
c mm 582 612 627 642 677 682 712 750
d mm 497 527 542 557 592 597 627 665
16 to 25 bar
Switching point a mm 672 702 717 732 767 772 802 840
b mm 632 662 677 692 727 732 762 800
c mm 572 602 617 632 667 672 702 740
d mm 487 517 532 547 582 587 617 655
Tab. 14
Type M95B - continued
Boiler size 9 A B C D E F G
6 to 13 bar
Switching point a mm 847 853 892 897 912 907 907 932
b mm 807 813 852 857 872 867 867 892
c mm 747 753 792 797 812 807 807 832
d mm 662 668 707 712 727 722 722 747
16 to 25 bar
Switching point a mm 837 843 882 887 902 897 897 922
b mm 797 803 842 847 862 857 857 882
c mm 737 743 782 787 802 797 797 822
d mm 652 658 697 702 717 712 712 737
Tab. 15
*4 WSA-ME = Water level indicator centre-to-centre distance
Fitting measuring and control equipment… (cont.)
5837986

19
Fitting the flue gas hood to the ECO (if included and delivered separately)
Danger
Leaks can result in poisoning through escaping
gas.
Check unused boiler apertures and gas lines for
tightness. Reseal if required.
A
C
C
B
D
Fig. 7
1. Fit gasket D.
2. Place flue gas hood A on ECO B. Align centrally.
3. Secure the flue gas hood diagonally such that it is
gas-tight.
Note
Max. torque 25 Nm
4. Fill the space between the thermal insulation of the
hood and the ECO with thermal insulation mats.
5. Fit the thermal insulation panels.
Note
Thermal insulation mats and thermal insulation panels,
sealing material and fastening elements are included
in the optional scope of delivery.
Note
Connect all flue pipes free of load and torque stress.
The flue pipe and flue gas hood connection points
must be gas-tight.
Mounting the flue pipe
ØD
Ø10
2-3xØD
Fig. 8
1. Connect the flue outlet with the flue system using a
flue pipe, ensuring favourable flow characteristics.
2. Position the test port (approx. 10 mm 7) down-
stream of the flue outlet, at a distance of 2 to 3
times the flue pipe diameter.
3. Seal the flue pipe.
4. Insulate the flue pipe.
Note
A flue gas flange with mating flange is optionally
available.
Flue pipe diameter
Type M73B
Boiler size 1 2
■Internal 7*5 mm 152 192
■External 7*5 mm 160 200
Tab. 16
Type M73C
Boiler size 3 4 5 6 7 8 9
■Internal 7*5 mm 214 240 270 305 344 390 440
■External 7*5 mm 224 250 280 315 354 400 450
Tab. 17
*5 Values are identical with or without ECO.
Connections on the flue gas side
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20
Type M75C
Boiler size 1 2 3 4 5 6 7 8
Internal 7
■With ECO mm 440 440 490 550 620 620 700 790
■Without ECO mm 490 550 620 620 700 790 790 890
External 7
■With ECO mm 450 450 500 560 630 630 710 800
■Without ECO mm 500 560 630 630 710 800 800 900
Tab. 18
Type M75C - continued
Boiler size 9 A B C D E F G
Internal 7
■With ECO mm 790 890 890 890 990 990 990 990
■Without ECO mm 890 990 990 1110 1110 1110 1240 1240
External 7
■With ECO mm 800 900 900 900 1000 1000 1000 1000
■Without ECO mm 900 1000 1000 1120 1120 1120 1250 1250
Tab. 19
Type M93B
Boiler size 3 4 5 6 7 8 9
External 7mm 224 250 280 315 354 400 450
Internal 7mm 214 240 270 305 344 390 440
Tab. 20
Note
Values for type M73B, M73C and M93B are identical
with or without ECO.
Type M95B
Boiler size 1 2 3 4 5 6 7 8
External 7
■With ECO mm 450 450 500 560 630 630 710 800
■Without ECO mm 500 560 630 630 710 800 800 900
Internal 7
■With ECO mm 440 440 490 550 620 620 700 790
■Without ECO mm 490 550 620 620 700 790 790 890
Tab. 21
Type M95B - continued
Boiler size 9 A B C D E F G
External 7
■With ECO mm 800 900 900 900 1000 1000 1000 1000
■Without ECO mm 900 1000 1000 1120 1120 1120 1250 1250
Internal 7
■With ECO mm 790 890 890 890 990 990 990 990
■Without ECO mm 890 990 990 1110 1110 1110 1240 1240
Tab. 22
Connections on the flue gas side (cont.)
5837986