Kroll BKM120 User manual
Operation Manual
BKM120
Mobile hot-water unit
053373-00c / July 2014 0085
1
Contents
1 General 2
1.1 Fields of application ........................... 2
1.2 Equipment and principle..................... 2
1.3 Pipework scheme............................... 3
1.4 Technical data .................................... 4
1.5 Circuit diagram................................... 5
2 Safety instructions 6
3 Transport and storage 7
3.1 Transport............................................ 7
3.2 Storage............................................... 7
4 Installation and commissioning 8
4.1 Installation.......................................... 8
4.2 Mounting and connection................... 8
4.2.1 Flue gas pipeline.............................8
4.2.2 Oil pipe............................................8
4.2.3 Secondary circuit.............................8
4.2.4 Condensate pipe.............................8
4.2.5 Electrical connection .......................8
4.3 Commissioning................................... 8
4.3.1 Commissioning at outdoor
temperatures >5 °C .........................9
4.3.2 Commissioning at outdoor
temperatures <5 °C .........................9
4.3.3 Secondary side ...............................9
5 Decommissioning 10
5.1 Boiler shutdown................................ 10
5.2 Disassembling the unit..................... 10
6 Control settings 11
6.1 Normal heating mode....................... 11
6.2 Manual heating mode....................... 11
6.3 Standby mode.................................. 11
6.4 Boiler temperature ........................... 11
7 Maintenance and servicing 12
7.1 Cleaning of combustion chamber
and boiler ......................................... 12
7.2 Cleaning of neutralization box and
plastic heat exchanger ..................... 12
7.3 Cleaning of plate heat exchanger .... 13
7.4 Filling (primary circuit) ...................... 13
8 ECconformitycertication 14
9 Notes 15
BKM120
2
General
1 General
The mobile Kroll hot-water unit BKM120 is the
result of decades of experience and intensive
development work. The core piece of the unit is
our well-proven permanently condensing boiler
BK100. Its main characteristic is the very high
degree of efciency that makes the BKM120 a
very energy saving unit. We are convinced to
hand you over a top-quality product.
To achieve a long service life and a trouble-free
operation, all details concerning installation and
commissioning that are described in this manual
have to be observed carefully.
Before installation and commissioning, read
the manual carefully.
Installation, mounting and commissioning must
be done by a professional.
Warning
1.1 Fields of application
Typically, the BKM120 is used as an additional
heating or a transitional heating, e.g. during
replacement works or when changing the local
warm water system.
Furthermore, the BKM120 is used to provide pro-
cess heat e.g. for defrosting or drying processes.
It is suitable for big events such as music fes-
tivals, exhibitions, shows or sports events as a
temporary heating water or domestic hot water
generator.
1.2 Equipment and principle
The heat-creating part of the BKM120 is the per-
manently condensing boiler BK100. The interface
to the external connection of the heating circuit is
a plate heat exchanger.
In the following, the circuit of the heat transfer
medium between boiler and heat transformer
will be called "primary circuit" or "primary side".
The circuit which is connected externally and
owing through the heat transformer at the
opposite side, will be called "secondary circuit"
or "secondary side".
Note
The burner is supplied with oil (oil connection at
the back of the BKM120, single-line system) and
creates a power of up to 120kW inside the boiler.
The energy is transferred to the primary circuit.
To protect it from freezing, it consists of a mixture
of ethylene-glycol and water.
The actual heat transfer to the water of the
secondary circuit takes place inside the plate
heat transformer. The desired outlet temperature
is to be adjusted at the control. The complete
secondary side is made of stainless steel.
The condensate being created during the con-
densation of the ue gas is neutralized in a
downstream neutralization box (pH around 7)
and can then be lead into the canalization.
The combustion air is taken in at the upper
rear of the BKM120. The ue gas is lead away
through a chimney at the back.
The following page shows a pipework scheme
of the principle in use with the existing units and
valves. The exact position of the single compo-
nents and connections in the scheme does not
necessarily correspond to their real position. The
manual refers to this pipework scheme by the
indicated denomination of the components (B1,
X1, V3,…).
3
General
P1
P2
TIC
S1
TIC
S2
TIC
S3
X2
M
X1
M
P3
Kroll GmbH - Pfarrgartenstraße 46, D-71737 Kirchberg
P&I diagram
Ausg. Datum Gezeichn. Geprüft
BKM120 A 03.04.14 Schmid
heat
consumer
plate heat
exchanger
oil burner
BK100 boiler neutralisation box
electric air
preheater
neutralized
condensate
flue gas
air
oil
S1
expansion
tank
B1
B2
B3
PI
S6
B4
B5
V3
V1
V2
P1 Kesselkreispumpe Boiler circulation pump
P2 Zubringerpumpe Primary flow pump
P3 Kondensatpumpe Condensate pump
V1 Brennergebläse Burner fan
V2 Abgasgebläse Flue gas fan
V3 Granulatbelüftung Air sparging for granulate
X1 Interner Mischer Internal mixer
X2 HK1 Mischer HC1 mix er
Apparate / Apparatus
V1
V2
B1 Absperrhahn Shut-off cock
B2 Absperrhahn Shut-off cock
B3 Absperrhahn Shut-off cock
B4 Kesselfüll- und entleerhahn Filling and discharging cock
B5 Kappenventil Cap valve
B6 Hahn für Belüftung Valve for aeration
B7 Entleerhahn Sekundärseite Discharging cock secondary
V1 Entlüfter Primärseite Vent valve primary side
V2 Entlüfter Sekundärseite Vent valve secondary side
V3 Entlüfter Wärmeübertrager Vent valve heat exchanger
V4 Sperrventil Blocking valve
S1 Überdruckventil Safety valve
Ar m ature n / V alves
S1-TIC Kesselrücklauffühler Boiler return flow temperature sensor
S2-TIC Kesselvorlauffühler Boiler temperature sensor
S3-TIC Vorlauffühler der Sekundärseite Flow temperature sensor secondary side
S4-TIC Abgastemperaturfühler Flue gas temperature sensor
S5-TIC Außentemperaturfühler Ambient temperature sensor
S6- PI Kesselmanometer Boiler pressure gauge
Fühler / Sensors
V3
V4
el
TIC
S4
B6
B7
TIC
S5
el
1 2 N
48
8 9 N
50
14 N
49
10 11 N
5 N
51
44
1.3 Pipework scheme
BKM120
4
General
1.4 Technical data
General
Nominal heat output (max.) 120 kW
Degree of efciency (min.) 99,6 %
Fuel* Heating oil EL, Diesel, Kerosine (EN304)
Fuel consumption (max.) 11,4 l/h
CO2-concentration 13 Vol.-%
Flue gas mass ow (max.) 54 g/s
Flue gas temperature <48 °C
Air/Flue gas System Ø 110/160 mm
Minimum operation temperature -20 °C
Primary and secondary side
Primary liquid Water/ethylene-glycol (61/39)
Temp. stability of the primary liquid -25 °C
Volume primary liquid ca. 220 l
Secondary liquid Water
Primary ow rate ca. 4,5 m³/h
Secondary ow rate** ca. 2 bis 12 m³/h
Max. pressure primary circuit 300 kPa
Max. pressure secondary circuit 800 kPa
Pressure drop secondary side*** 16 kPa
Max. outlet temperature 80 °C
Connections
Secondary ow and return 2" BSP internal thread
Oil pipe Quick coupling (female)
Filling/discharging primary circuit 1/2" hose connection
Discharge heat exchanger 1/2" internal thread
Electric connection
Voltage 230 V
Amperage 16 A
Plug blue IEC60309-plug
Frequency 50 Hz
Dimensions and weight
Length 2800 mm
Width 1100 mm
Height 2100 mm
Total weight (lled) 1700 kg
* Fuel depending on ambient temperature (see chapter "Installation and connection")
** The secondary side ow rate must be adapted to the inlet temperature (see chapter "Commissio-
ning")
*** At a dimensioning ow rate of 4,5 m³/h (at 12 m³/h, 89 kPa pressure drop)
5
General
1.5 Circuit diagram
BKM120
6
Safety instructions
2 Safety instructions
This manual is valid exclusively for the Kroll
BKM120. It has to be read by the persons in
charge of installation, commissioning or main-
tenance before starting their work. The speci-
cations given in the manual must be observed.
Non-observation leads to expiration of warranty
against the company Kroll GmbH.
All safety instructions contained in the manual
must be observed.
Warning
In some passages of this BKM120 manual,
there are references to the manual of the
permanently condensing boiler BK100. Here,
only the indicated passages of this manual are
valid.
Note
The following safety instructions must be obser-
ved:
• Only suitably qualied and trained staff is
allowed to do the installation, commissio-
ning and maintenance of the hot-water unit
BKM120.
• Only electric professionals are allowed to
work at electric elements (e.g. control).
• For electric installations, the regulations
of the VDE and of the local energy supply
company (EVU) are decisive.
• Never bridge, take off or take out of opera-
tion safety devices.
• The BKM120 must only be operated when it
is in a technically proper condition.
• Faults or damages that could or do alloy the
safety must be repaired immediately and
professionally.
• Damaged elements and unit components
must only be replaced by original Kroll
spare parts.
Always observe the regulations, warnings of the
local safety regulations during loading, transport
to or from site, as well as during storage.
• Risk of injury! Unloading/transport by hand
is not permitted at a weight of >35kg (IAA,
Geneva) respectively at a single lifting of
max. >55kg (UVV/BMA).
• For your own safety, always use suitable
lifting devices and/or industrial trucks and
lifting devices with suitable lifting capacity.
Before lifting/unloading and for safe putting
on the ground of the BKM120, always make
sure that there is enough space.
• Fix the load handling device carefully and
secure them. No danger must be created by
the hovering load!
• Always lift the BKM120 vertically, never pull
it slopingly!
Never stay under hovering loads. Danger to
life!
Warning
The BKM120 must be handled with the usual
care during unloading, transport to site and an
eventual interim storage. It must also be protec-
ted against undue force and/or falling objects.
The manual must be placed well visible position
inside the BKM120.
7
Transport and storage
3.2 Storage
During storage, especially with low outside
temperatures, the secondary side must be com-
pletely discharged in order to avoid damages
caused by freezing. A drain bolt is intended for
this at the heat exchanger.
In order to avoid a long starting time at the next
commissioning, the water inside the neutraliza-
tion box must be drained as completely as possi-
ble – without taking off the granulate.
If the unit was run with standard heating oil EL
during its last operation and if you cannot make
sure that the ambient temperature will not drop
below 5°C during storage, the heating oil must
be displaced by winter diesel/kerosine (EN304)
(see table in chapter „Installation and commissi-
oning“). To do so, let the unit run for about 15 min
with winter diesel/kerosine before transport.
Otherwise, parafn can precipitate at low tem-
peratures which will block the oil supply. In this
case, the unit must be pre-heated electrically
before starting it.
Stacking storage
For storage, two units can be stacked on top of
each other. Therefore, there are stacking devices
at the upper angles of the BKM120. Before sta-
cking the units, all side panels must be mounted.
The upper unit must be put carefully and just
onto the lower unit.
Only stack the units with the same guidance
(front side onto front side, rear side onto rear
side).
Warning
When the units are stacked, never do any
maintenance, cleaning or other work, neither at
the upper unit nor at the lower unit.
Warning
3 Transport and storage
3.1 Transport
Before transport, make sure that
• all connections have been removed. This
means the electrical connections, the oil
feeding line and the secondary connection
(water connection).
• the chimney has been removed and be
xed at the back of the BKM120 into the
corresponding bracket.
• the primary side has completely cooled
down.
• the secondary side is completely dischar-
ged.
• the neutralization box is completely dischar-
ged (water).
• no attached elements stick out the outer
edges of the unit.
Before transport, all connection elements and
xing brackets must be checked if they are xed.
Never transport two stacked units at the same
time.
Warning
Transport devices
In general, the BKM120 can be lifted with a
forklift or a hand lift at three points (left side, right
side, front side).
Never lift the BKM120 from its back.
When lifting from the front side, the forks of the
forklift must have a minimum length of 1,6m.
Warning
To use a crane, there are four xing devices for
shackles at the base of the unit.
If a crane is used, do only lift the BKM120
using the shackles at the base of the unit. Over
the unit, a bar must be used as distance piece
between the crane ropes.
Warning
The unit’s specially slender construction permits
a parallel transport of two units in a standard
swap trailer with a width of 2500mm.
BKM120
8
Installation and commissioning
Temperature range Fuel
>5°C Heating oil EL
-10–5°C Winter diesel
<-10°C Kerosine (EN304)
If inside the oil supply line to the boiler there
is still a rest of combustible not suitable for the
outside temperature, you may have to pre-heat
the oil supply line.
Note
4.2.3 Secondary circuit
The two connections for the secondary circuit are
placed at the unit’s back (ow on the right side,
return on the left side). If necessary, please take
off the closing caps rst.
4.2.4 Condensate pipe
During operation of the unit, condensate is con-
stantly created. Normally, the condensate auto-
matically leaves the unit via the central rear drain
channel. If this is not desired because the out
owing condensate cannot seep away, the con-
densate pipe (plastic hose) must be lead through
the ap of the drain channel into a suitable area
or basin.
The outcoming condensate is warm. In case of
very low outside temperature, the condensate
pipe must nevertheless be protected against
freezing, especially it goes over long distances.
Note
Before commissioning ll the neutralization box
and the siphon with water.
4.2.5 Electrical connection
The plug for the electrical connection is placed
on the upper rear side of the unit. It is a blue IEC
60309 plug (16 A, 230 V, 50/60 Hz, L-N-PE).
Connect the unit to 230V / 50Hz. The elec-
tric connection must be done by authorized
personnel.
Warning
4.3 Commissioning
Before commissioning, make sure that
• in the primary circuit, there is a pressure of
minimum 1,5bar (if the pressure is lower,
you have to add heat transfer liquid, see
chapter "Maintenance and servicing").
4 Installation and commissio-
ning
Fig. 1: Control panel BKM120
Main switch BKM120
Light
Main switch boiler
Boiler control
Changeover switch
Preheat/Boileroperation
Heating of neutralization-
box and siphon
Signal lamp bur-
ner malfunction
Resetbutton for safety tem-
perature limiter
4.1 Installation
The ground on site where the BKM120 will be
installed must be rm and plane (max. 2° dec-
line). If the unit is supposed to be placed on the
naked ground, it must be shimmed suitably in
order to avoid tilting when the ground gets wet,
e.g. by rain.
A distance of 1 m to walls or objects must be kept
from all sides of the unit.
Do not install the unit in rooms containing explo-
sive dust, smoke, ammable gas or liquids.
Make sure that the air intake at the unit’s back is
not blocked. The ue gas must be able to escape
to the outside. When installed in a hall, the maxi-
mum length of the ue gas pipe is 20 m. Provide
the necessary air supply in the hall.
4.2 Mounting and connection
4.2.1 Flue gas pipeline
1. Take the ue gas connection pipe (chimney
with angle) off the bracket at the back of the
BKM120.
2. Take off the closing plug from the ue gas
connection piece.
3. Mount the ue gas connection pipe at the
connection piece and align it as vertically
upwards as possible.
4. Fix the ue gas pipe using the pipe clamp.
4.2.2 Oil pipe
The connection for the oil pipe is placed in the
upper area of the unit’s back (Quick coupling).
The fuel in use must be suitable for the outside
temperatures indicated in the following table.
9
Installation and commissioning
• Take off the intake hose from the burner
connection and put it into the foreseen con-
nection at the lower side of the burner hood.
• Turn the switch at the control panel to "Pre-
heat" and activate the main switch.
• Mount all side panels of the BKM120.
The 3kW electric heater now heats the complete
fresh air intake pipe and the heat exchanger,
the burner and the burner motor and the interior
room with the boiler control.
After about 30–45min (depending on the out-
door temperature), continue as follows:
• Take off the intake hose from the burner
hood and put it onto the burner connection.
• Promptly, adjust the switch to "Boiler".
Then activate the boiler main switch. The switch
will glow green. Depending on the operation
mode, do the necessary adjustments as shown
in the chapter "Control settings".
4.3.3 Secondary side
Until the operation temperature is reached, the
boiler circulates the liquid internally. Only after
that, the primary circuit is supplied and the
energy can be taken off by the secondary circuit
at the plate heat exchanger. The highest possible
temperature raise depends from the ow rate.
The following table indicates the calculated tem-
perature rise at different ow rates at the maxi-
mum power of 120kW. It only depends slightly
from the entering temperature.
Flow rate [l/min] Temperature rise [K]
50 35
100 17
150 12
200 8,6
At low entering temperatures (return temperatu-
res) of about <20 °C, the ow rate must not be
higher than 75 l/min (4,5 m³/h, calculated ow
rate). In addition to that, the boiler temperature
must be set to 85°C (see "Control settings").
Otherwise, undesired operation faults of the con-
trol may occur (pulsing control, long controlling
time).
• the secondary circuit is lled and deaerated.
• the cap valve B5 at the expansion vessel is
opened.
• the condensate pipe and the neutralisation
box are lled with water and free of ice.
• the valves B1, B2 and B3 are opened.
• all connections and screwings are sealed.
• the inlet air hose is put onto the burner.
At temperatures near or below the freezing point,
you have to check if the siphon of the conden-
sate pipe and the neutralization box are ice-free.
If they are not, you have to thaw the ice before
commissioning using the heating band. Switch it
on using the switch "Heat Neutrabox" at the con-
trol panel. When all the ice has melted, you can
continue the commissioning work.
4.3.1 Commissioning at outdoor tempe-
ratures >5 °C
At outdoor temperatures over 5°C, pre-heating
the burner and the inlet air components is not
necessary. The changeover switch at the control
panel must be adjusted do "Boiler". Then acti-
vate the boiler main switch. The switch will glow
green. Depending on the operation mode, do the
necessary adjustments as shown in the chapter
"Control settings".
4.3.2 Commissioning at outdoor tempe-
ratures <5 °C
In case of too low outdoor temperatures, the fol-
lowing problems may occur:
1. Condensate leftovers from last operation
can be frozen and thus hinder the newly
created condensate to ow away.
2. If a not suitable fuel is used or if a not sui-
table fuel is still inside the oil pipe, parafn
may have been created blocking now the oil
pipe.
3. If the intake air is too cold, it may happen
that there is no ame at the burner.
4. The bearing grease inside the burner motor
can be too viscous so that the motor does
not start.
For point 1, set the switch „Heat Neutrabox“ to
„1“. For point 2 observe the table on chapter
"Mounting and connecting". For points 3 and
4, you have to do the pre-heating programme
before the actual commissioning. This is how to
do it:
BKM120
10
Decommissioning
piece and black plastic tube) and close the con-
nection with a plug. Fix the tubes at the rear of
the BKM120 in the provided bracket.
Fig. 2: Chimney in transport position
Oil pipe
Normally, the oil pipe does not need to be
discharged. It is enough to disconnect the exter-
nal oil supply from the fast coupling at the rear.
Electrical connection
Set the main switch at the switch board of the
BKM120 to "Off" and then pull off the mains plug.
5 Decommissioning
5.1 Boiler shutdown
A complete decommissioning should, if possible,
only be done when the unit is moved to another
place. If the operation is only stopped for a short
period of time, the boiler should be switched to
"standby mode". See chapter "Control settings"
or in the control manual chapter 2.1.
If it cannot be ensured that the unit will not be
exposed to a to too low outside temperature
during the next commissioning, the boiler must
be operated with kerosine (EN304) for about
20min before shutdown, as indicated in the
chapter "Storage". This displaces the heating oil
from the oil pipes and the oil lter and deaerated
device.
To shutdown the boiler, proceed as follows:
• Push the ESC button several times until the
"ESC" text expires.
• Use the rotary knob to set "Select function"
and conrm.
• Select "Boiler" and conrm.
• Push the left, central quick-select button
twice.
• Set the operation mode to "Off" and conrm
with "Save".
• Wait for at least 5min, only then switch the
boiler main switch to "0".
5.2 Disassembling the unit
Water connection
Discharge the secondary circuit at a suitable,
external place and uncouple the connections
from the BKM120. If there is the danger of free-
zing, the secondary side must be discharged
completely, using the drain bolts in the plate heat
exchanger. In order to prevent dirt and small
objects from entering the pipework, the connec-
tions should be closed.
Neutralization
Remove the water/condensat from the neutrali-
zationbox siphon.
During low temperature conditions, the conden-
sate system and pump must be protected using
an anti-freeze solution. For example: Ethanol.
When preparing the unit for storage in low tem-
perature conditions, the main switch must be
used.
Flue gas system
Open the pipe clamp at the unit’s rear that sta-
bilizes the chimney, take off the chimney (elbow
11
Control settings
• Use the rotary knob to set "Select function"
and conrm.
• Select "Heating circuit 1" and conrm.
• Push the left, central quick-select button
twice.
• Set the operation mode to "Manual heating
mode" and conrm with "Save".
• Choose the desired secondary ow tempe-
rature and conrm with "Save".
6.3 Standby mode
As indicated in the chapter "Decommissioning",
the standby mode should always be preferred to
a complete shutdown of the boiler. This operation
mode makes sure that the boiler is held on mini-
mum temperature in order to prevent the ue gas
from condensing within the boiler.
Setting
• Push the ESC button several times until the
"ESC" text expires.
• Use the rotary knob to set "Select function"
and conrm.
• Select "Heating circuit 1" and conrm.
• Push the left, central quick-select button
twice.
• Set the operation mode to "Standby mode"
and conrm with "Save".
6.4 Boiler temperature
Normally, the boiler temperature is controlled
automatically, depending on the secondary
settings and the outside temperature. In special
cases, it may be necessary to set a x boiler
temperature. This is for example the case when
the return temperature of the secondary side
is particularly low (<20°C). In this situation, the
boiler must be set to a manual mode with a high
temperature. This ensures a kind of buffer effect
in the energy content of the heat transfer liquid.
Otherwise, undesired operation faults of the con-
trol may occur (pulsing control, long controlling
time).
Setting
• Push the ESC button several times until the
"ESC" text expires.
• Use the rotary knob to set "Settings MB"
and conrm.
• Select "Enter password" and conrm.
• Enter the password "234" and conrm.
6 Control settings
Generally consider the operating manual of the
master control.
Note
Mostly, settings are only done at the secondary
side. These settings are indicated in the manual
of the control (Conform 6.0 Master control) in the
chapters 2.1 and 5.1.
In the manual and in the display of the control,
the secondary circuit is called "Heating cir-
cuit 1".
Note
Basically, three operation modes are reasonable
for the BKM120:
• Normal heating mode
• Manual heating mode
• Standby mode
6.1 Normal heating mode
In the "Normal heating mode", the ow tempera-
ture of the secondary circuit is automatically con-
trolled with the help of the current outside tempe-
rature. This mode is especially suitable when the
heating system of a building is supposed to be
supplied automatically, just like with a normal, x
installed heating boiler.
Setting
• Push the ESC button several times until the
"ESC" text expires.
• Use the rotary knob to set "Select function"
and conrm.
• Select "Heating circuit 1" and conrm.
• Push the left, central quick-select button
twice.
• Set the operation mode to "Normal heating
mode" and conrm with "Save".
6.2 Manual heating mode
"Manual heating mode" is always used when a
certain ow temperature shall be kept. In this
operation mode, the ow temperature is not cont-
rolled via the outside temperature.
Setting
• Push the ESC button several times until the
"ESC" text expires.
BKM120
12
Maintenance and servicing
7 Maintenance and servicing
Before any maintenance work is done, the unit
must have cooled down completely and the main
switch must be set at „Off“.
Do not do any maintenance work during sta-
cked storage.
Warning
7.1 Cleaning of combustion chamber
and boiler
To clean the combustion chamber, you do
not have to remove the burner. For the exact
cleaning procedure see the boiler manual chap-
ter 7.1–7.3 "Cleaning of combustion chamber
and boiler", "Cleaning of the ue gas passes"
and "Cleaning of the ue gas passes box".
7.2 Cleaning of neutralization box and
plastic heat exchanger
After every operation of the BKM120, respec-
tively once every six months, you have to check
if a cleaning of the neutralization box and the
granulate is necessary.
Fig. 3: Filled neutralization box
lling line
For the cleaning remove the siphon and wash
it out with water. Then wash the synthetic heat
exchanger from the front (see burner manual
chapter 7.4 „Wet cleaning – neutralization box
and plastic heat exchanger“). The water leaves
at the back via the drain channel of the BKM120.
In order to clean the granulate, ll it into a sepa-
rate basin rst. There, wash it with clear water,
decant the water and rell the cleaned granulate
back into the neutralization box. If necessary,
amend fresh granulate (to the lling line).
• Push the ESC button.
• Use the rotary knob to set "Select function"
and conrm.
• Select "Global functions" and conrm.
• Push the menu button.
• Select "Enter password" and conrm.
• Enter the password "187" and conrm.
• Push the ESC button twice.
• Select "Boiler" and conrm.
• Push the left, central quick-select button
twice.
• Set the operation mode to "Manual heating
mode" and conrm with "Save".
• Set the boiler temperature to "85" °C and
conrm with "Save".
If this function is not needed any more, go
through the settings in the same way and set
the operation mode to "Automatic".
Note
13
Maintenance and servicing
Shortly after switching on the lling pump, B4 is
opened. The deaeration during the lling is done
via the deventilator V1 (partially also via V3)
At the end of the lling process, the pressure
rises again slowly. Now, the expansion vessel is
lling. When a pressure of 1,8 bar (pressure of
the expansion vessel is 1,5bar) is reached, close
B4 and switch off the lling pump.
7.3 Cleaning of plate heat exchanger
Generally consider the operating manual of the
master control.
Note
After every operation of the BKM120, possibly
discharge the secondary circuit completely (using
the secondary drain bolt at the heat transformer)
and wash the secondary side including the heat
transformer with clear water (after that, discharge
again).
If there is a bigger pressure drop on the secon-
dary side (see „Technical data“), it may be neces-
sary to completely clean the single plates of the
heat exchanger. In order to do that, rst close the
two ball valves B1 and B2. Inside the now locked
part of the primary side, there are about 11,5l of
heat transfer liquid, which can be discharged via
the primary drain bolt. For ventilation, open the
ball valve B6. Ideally, the discharged heat trans-
fer liquid should be collected.
The heat trasferring liquid Glykosol N is classi-
ed with water hazard class 1 as slightly water
endangering.
Note
Now you can unscrew the four bolts (two at the
primary side and two at the secondary side) and
loosen the cover plate of the heat exchanger.
For the detailed process of cleaning see the
separate manual of the plate heat exchanger.
Relling(seealsochapter"Fillingprimary
circuit")
Open the ball valves B1, B2 and B3. The 4-way
mixer X1 must be opened (push the lever and
set to central position). Now, you can slowly ll
in the missing heat transfer liquid in the primary
circuit via the ller pipe B4. Deaeration is done
via V3. Keep on lling until a pressure of 1,8 bar
is shown.
7.4 Filling(primarycircuit)
Before lling, please ensure that all ball cocks of
the primary circuit (B1, B2, B3), the cock to the
expansion vessel (B5) as well as the two mixers
(X1, X2) are opened. The mixers are opened by
pushing the levers and turning them to the cen-
tral position.
Then connect the receiving tank of the heat
transfer liquid (39% Glykosol N / 61% water) at
the the lling and draining cock B4 to the lling
pump.
BKM120
14
EC conformity certication
8 ECconformitycertication
EG-Konformitätserklärung
Déclaration de conformité CE
15
Notes
9 Notes
Notes and particularities
BKM120
16
Notes
Notes and particularities
17
Notes
Notes and particularities
Any use, installation, maintenance that is not effected in accordance with the rules
specied in the operating instructions, or unauthorized modications to
the factory-made equipment design shall result in expiration of every guarantee claim.
Otherwise our “Conditions of Sale and Delivery” shall apply.
Subject to technical change in terms of product improvement without notice.
updated: 2016-01-29-08-16
Kroll GmbH company
Pfarrgartenstraße 46
D-71737 Kirchberg/Murr
Phone: 0049 (0)7144 / 830 200
Fax: 0049 (0)7144 / 830 201
E-mail: [email protected]
Internet: www.kroll.de
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