Resol HKM2 User manual

www.resol.de
RESOL HKM2
Heating circuit module
HKM2
Operation
Mounting
Electrical Connection
48001390 *48001390*
manual
Thank you for buying this RESOL product.
Please read this manual carefully to get the best performance from this unit.
Please keep this manual carefully.
EN

© RESOL 09005 HMK2.monen.indd
HKM2
|2
Subject to technical change. Errors excepted.
Security instruction............................................................ 2
Description of symbols ...................................................... 2
Disposal ............................................................................... 2
Information about the product......................................... 2
Technical data ..................................................................... 4
Application examples ........................................................ 4
1. Installation................................................................ 5
1.1 Wall mounting.............................................................................5
1.2 Electrical connection.................................................................5
1.3. Connecting terminals................................................................6
2. Function overview ................................................... 7
2.1 Heating circuit.............................................................................7
2.2 Timer ............................................................................................7
2.3 Remote control ..........................................................................7
2.4 Switch-off heating circuit..........................................................7
2.5 Rapid heating-up.........................................................................7
2.6 Flow set temperature................................................................8
2.7 Mixer control..............................................................................8
2.8 Domestic water priority ..........................................................8
2.9 Blocking protection of the heating circuit pump ...............8
2.10 Anti-freeze function...................................................................8
2.11 Store after-heating .....................................................................8
3. Operation and Adjustment..................................... 9
3.1 Control parameters...................................................................9
3.1.1 Temperature flow.................................................................... 10
3.1.2 Outdoor temperature ........................................................... 10
3.1.3 Manual correction (remote control) .................................. 10
3.1.4 Flow set temperature............................................................. 10
3.1.5 Store temperature 1............................................................... 10
3.1.6 Store temperature 2............................................................... 10
3.1.7 Night correction...................................................................... 10
3.1.8 Day correction......................................................................... 10
3.1.9 Maximum flow temperature................................................. 11
3.1.10 Heating curve........................................................................... 11
3.1.11 Mixer runtime.......................................................................... 11
3.1.12 Summer operation.................................................................. 11
3.1.13 Domestic water priority ....................................................... 11
3.1.14 Timer ......................................................................................... 11
3.1.15 HKM expert............................................................................. 12
3.1.16 Manual operation .................................................................... 13
3.1.17 Operating control lamp - flashing codes ........................... 13
4. Commissioning ......................................................13
5. Tips for fault localisation....................................... 13
5.1 Troubleshooting....................................................................... 14
Sensor types......................................................................15
Accessory..........................................................................15
Contents
Description of symbols
WARNING!
Warnings are indicated with a
warning triangle!
Signal words describe the danger that may occur, when it
is not avoided.
- Warning means that injury, probably life-threatening
injury, can occur.
Information about the product
Proper usage
This product is to be used to extend RESOL controllers
to a coupled heating/ solar controller unit in compliance
with the technical data specified in this manual.
Improper use excludes all liability claims.
CE – Declaration of conformity
The product complies with the relevant direc-
tives and is therefore labelled with the CE mark.
The Declaration of Conformity is available upon
request, please contact RESOL.
Note
Notes are indicated with an information
symbol.
Disposal
- Dispose of the packaging in an environmentally sound manner.
- Dispose of old appliances in an environmentally sound
manner. Upon request we will take back your old ap-
pliances bought from us and guarantee environmentally
friendly disposal of the devices.

© RESOL 09005 HMK2.monen.indd
HKM2
3 |
Ordering information:
Art. no.
• RESOL HKM2 145 440 30
Heating circuit module for a weather-compensated heating circuit
• RESOL HKM2 - complete package 145 440 40
Heating circuit module for a weather-compensated heating circuit
incl. outdoor temperature sensor FAP13 and flow temperature
sensor FRP21
Can fuse
(T4A)
Attachment opening
Sensor terminals
Net terminals
LC- Display
Operating control lamp
Cable conduits
Protective conductor (common
terminal block)
Cover
Cover locking screw
Programming plug
VBus®-connection
Relay terminals
Pushbuttons
Manual switch

© RESOL 09005 HMK2.monen.indd
HKM2
|4
• Weather-compensated heating circuit
• Timer (daily programme)
• Prepared for the usage of the remote control RTA11-M
• Mixer control
• Domestic hot water priority
• Blocking protection of the heating circuit pump
• Anti-freeze function
• Weather-compensated store after-heating
By means of the HKM2, RESOL controls can be extended
to a coupled heating/ solar controller unit.
The heating circuit module is equipped with:
4 sensor inputs (Pt1000)
1 input for remote control RTA11-M
5 relay outputs
Operating control lamp
Manual control switch
Technical data
Housing:
plastic, plug-in
Protection type
IP20 / EN 60529
Size:
208 x 141 x 65 mm
Ambient temperature:
0 ... 40 °C
Inputs:
4 sensor inputs Pt1000
1 for RTA11-M
Outputs:
4 standard relays
1 potential-free change-over contact
Display: LC-Display,
7-segmental-Display
Adjustment range:
-40 °C ...+250 °C
Power supply:
210 ... 250 V~, 50 ... 60 Hz
Total switching capacity:
4 (1) A max.
Bus connection:
RESOL VBus®
Included:
1 x HKM2
1 x spare fuse T4A
3 x screw and wall plug
Application examples
The pictograms included in this manual show only some of the controller functions and do not qualify for being complete.
They just illustrate a selection of the possible applications.

© RESOL 09005 HMK2.monen.indd
HKM2
5 |
The electrical connection must be effected according to
the corresponding electrical connection diagram.
The HKM2 must additionally be supplied from a double
pole switch with contact gap of at least 3 mm. Either fuses
or circuit breakers can be used for that purpose.
Cables
The cable glands of the housing are suitable for cables with
an external diameter of 5 mm up to 12 mm.
The cables have to be inserted through the cable glands and
bent into the cable conduits. The cables must be inserted
into the terminal block with stripped cable ends ensuring no
stray wires. All cables must be attached directly below the
housing with strain reliefs. Please pay attention to separate
routing of sensor cables and mains cables.
WARNING!
Switch-off power supply before
opening the housing.
1.1 Wall mounting
1. Installation
The HKM2 is designed for wall-mounting. Please pay at-
tention to the fact that the back of the wall housing is not
accessible when the controller is mounted. The module in
use has to be protected from humidity, dirt and damage.
For opening the cover the fastening screw must be un-
screwed by just one rotation. This way the cover can be
flapped away.
Please fasten the upper screw and hook the housing to the
upper hanging. The module can be straightened now, both
lower holes must be marked on the wall. After having re-
moved the housing, the lower wall plug holes can be drilled.
For the upper fixing of the housing, turn the appropriate
wall plug just as far into the round head screw Ø4 x 35mm
so that the housing can be just hooked on. Now the housing
can be fastened using two more screws Ø 4 x 35 mm at the
lower part of the housing.
1.2 Electrical connection

© RESOL 09005 HMK2.monen.indd
HKM2
|6
VBus®-connection
not assigned
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Sensor flow
Outdoor temperature
sensor
Store sensor 1
Store sensor 2
Remote control
(optional)
without function
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Medium contact 5 *
Standard relay 3
Standard relay 2
Standard relay 1
Mains connection
1.3 Terminals
The connection of the remote control can be effected by
terminals 3 and 4. The connection of the sensors can be
effected at the terminals 5 to 12 with either polarity (see
terminal scheme figure 1).
The main controller and the HKM2 module are connected
via the RESOL VBus®.The connection is effected by ither
polarity at terminals 13 and 14. The configuration of the mo-
dule is effected at the main controller. Activate HC Module
within the menu of the main controller. From DeltaSol
®
M version 1.10 on, you can choose between “No”, “HKM1”
and “HKM2”, in the previous versions between “Yes” and
“No”. All adjustments and display values are listed in the
corresponding menu (HC Module).
fig.1
without function
fig. 2
Changeover contact
(terminals 1-2) The connection of the load must be effected at the terminals
17 to 28 with correct polarity (Rx/N) (see terminal scheme,
fig. 2). The protective conductors are to be connected to
the protective conductor common terminal block (fig. 3).
* The HKM comes with an insulated jumper from terminal
19 to terminal 20. The removal of the jumper results in a
potential-free changeover relay at the terminals 17, 18 and
19 (break, work, common center).
The mains connection is to be effected at the terminals:
29 = neutral conductor N
30 = conductor L
protective conductor (common terminal block)
R1 = HL-pump
R2 = Mixer ON
R3 = Mixer OFF
R4 = without function
R5 = After-heating
Take the protective conductor common terminal block
from the accessory bag. Connect all protective conductors
in currentless state and insert them into the slots of the
terminal block (see position fig. 3).
fig. 3
protective conductor -
common terminal
In t he c a se of t he ad jus t m e nt AH = Boiler (from
DeltaSol
®M 1.10 on) two store sensors can be used.
In case of the adjustment AH=Therm. or AH=Boiler
Conductor L
1000 Ω
1360 Ω
1000 Ω
1000 Ω
Note:
The terminals (1-8) are factory-installed with 1000 ohms or
1360 ohms resistors. In case of an appropriate allocation of
the terminals, please remove the resistors.

© RESOL 09005 HMK2.monen.indd
HKM2
7 |
2.5 Heating circuit rapid warm-up A rapid warm-up of the heating circuit can only be activated
if the remote control is set to position “rapid warm-up
process”.
Rapid warm-up means that the mixer is fully started up
and the heating circuit pump is switched on. There is no
regulation of the flow temperature. The heating circuit
rapid warm-up should only be activated if the maximum
flow temperature exceeds the current store temperature.
The heating circuit will be switched off if the maxiumum
flow temperature is reached.
2.1 Weather-compensated heating circuit: The flow set temperaure for the heating circuit results
from the outdoor temperature and the chosen heating
curves. This flow set temperature can also be changed with
a remote control and the parameters “day correction/night
correction”. The control adjusts the current heating circuit
flow temperature to the determined flow set temperature
by opening/closing the heat circuit mixer.
2.2 Timer (daily programme):
The timer determines whether the day correction or the
night correction is used for changing the flow set tempe-
rature. If one of the time frames of the timer is “active”,
the night correction is used. If none of the time frames is
active, the flow set value is changed due to the day cor-
rection. A time frame is “active” when the current time is
between the switch-on and the switch-off time.
2.3 Remote control: The remote control allows manual adjustment of the hea-
ting curve (+/-15 K). Moreover, the heating circuit can be
switched off or a rapid warm-up process can be started
with the remote control. The remote control is optional
and it is not included in the full kit.
2.4 Heating circuit shutdown: The heating circuit can be switched off manually if
•the remote control is set to “Heatlp. off”
The heating circuit is shut down automatically if
•the adjusted maximum flow temperature is reached
•the outdoor temperature is higher than the adjusted
summer temperature.
•the flow set temperature sensor is faulty.
• or the heating circuit at the controller is deactivated
(permanently off)
Heating circuit shutdown means that the heat circuit pump
is switched off and the mixer is shut down.
2. Function overview All settings for the HKM2 have to be adjusted with
the corresponding menu of the connected control-
ler! Please read the manual for the controller in
order to use all functions of the HKM2.

© RESOL 09005 HMK2.monen.indd
HKM2
|8
2.6 Flow set temperature: The flow set temperature results from the measured
outdoor temperature and the chosen heating curve. The
correction value of the remote control as well as the day
correction or night correction are added to these values.
The flow set temperature = heating curve temperature +
remote control + (day correction or night correction). If
the calculated flow set temperature is higher than the adju-
sted maximum flow temperature, the flow set temperature
is equated with the maximum flow temperature.
2.7 Mixer control: The mixer control is used for matching the flow tempera-
ture with the flow set temperature. For this purpose the
mixer is started up/shut down according to the deviation.
The mixer is activated for the runtime of four seconds
(factory setting). The break time is calculated from the
set and actual value.
2.8 Priority of domestic hot water This function switches off the heating circuit during domes-
tic hot water after-heating. For this purpose the option
domestic hot water priority has to be activated and the
after-heating has to be effected by the boiler charge con-
trol.
2.9 Blocking protection for heating circuit pumps: The heating circuit pump is switched on every day at
12 o’clock for 30 seconds to prevent the pump from getting
stuck. This function does not work if the flow set value is
reached, the flow sensor is damaged or the function do-
mestic water priority is activated.
2.10 Anti-freeze function If the temperature at the flow sensor falls below 8 °C,
the heating circuit is switched on. If the flow temperature
reaches 10 °C, the heating circuit is switched off again.
2.11 Store after-heating (Differential controller): In order to start up the after-heating (abbr.: AH) of the
heating circuit, the difference between the calculated flow
set temperature and one (AH=thermal) or two store sen-
sors (AH=boiler) is measured. If the difference between
both temperatures is too low, the after-heating is activated.
The after heating is switched off if the difference between
store and flow set temperature is high enough.

© RESOL 09005 HMK2.monen.indd
HKM2
9 |
3. Operation and adjustment
Connect the HKM2 module to the main controller via
the RESOL VBus®. Activate the HK-Module with the
corresponding menu option. From the DeltaSol
®M
version 1.10 on you can choose between “No”, “HKM1”
and “HKM2”, in the previous versions between “Yes” and
“No”. All parameters are shown on the corresponding
menu (HK-Module).
If more than one HKM2 module are to be connected to
one controller, a subadress has to be allocated to each
HKM2 module via the menu of the controller.
•select the menu channel SA by pressing buttons 1
and 2
•press the “set”-button,“SA” indication flashes
•allocate a number to each HKM2 module (e.g.“2” for the
second,“3” for the third HKM2 module connected)
3.1 Control parameter and display channels
•EC Error Code
Error Code, display channel HKM2
0= OK
1= sensor fault
2= bus defect
•VC Version Compatibility
System recognition of the HKM2 by the controller
display channel HKM2
0= bus defect
1= HKM1
3= HKM2
•SA SubAddress
Subadress for operation of VBus®
Adjustment channel HKM2
•MM Manual Mode
State of the relays, only if manual control switch
is set to I
0= R1 on, R3 on
1= R1 on, R2 on
2= R1 on
•PG ProGramme
Hardware version
Display channel HKM2
•VN VersioN
Software version,
Display channel HKM2
•FL FLow
Current flow temperature,
Display channel controller
•FS Flow Set
Current flow set temperature,
Display channel controller
•OU OUtdoor
Current outdoor temperature,
Display channel controller
•S1 Store temperature 1
Current temperature of store sensor 1,
Display channel controller
•S2 Store temperature 2
Current temperature of store sensor 2,
Display channel controller
•RA Remote A djustement
Adjustment of the remote control
Display channel controller
•S6 Sensor 6
Measured value only, without function
Display channel controller
•R1 Relay1:Heatingcircuitpump
Current state of the relay heating circuit pump
Display channel controller
•R2 Relay2:Mixeron
Current state of the relay for opening up
the mixer, display channel controller
•R3 Relay3:Mixeroff
Current state of the relay for shutting down
the mixer, display channel controller
•R5 Relay5:After-heating
Current state of the relay after-heating,
display channel controller
HKM2 channels

© RESOL 09005 HMK2.monen.indd
HKM2
|10
3.1.1 Temperature flow
The value temperature flow indicates the flow tempe-
rature of the heating circuits.
arrangement/heat.circuits/HC Module/TFlow
Display range: -30.0°C ... +200.0°C
3.1.5 Store temperature 1
arrangement/heat.circuits/HC Module/TSt
Display range: -30.0°C ... +200.0°C
3.1.7 Night correction
arrangement/heat.circuits/HC Module/night corr.
Adjustment range: -40 K ... 0 K
Factory setting: -4 K
3.1.2 Outdoor temperature The value temperature outdoor indicates the measured
outdoor temperature depending on weather conditions.
arrangement/heat.circuits/HC Module/T outd.
Display range : -30.0°C ... +200.0°C
3.1.4 Flow set temperature
arrangement/heat.circuits/HC Module/flow.set value
Display range: 20°C ... 100°C
3.1.3 Manual correction (remote control)
3.1.6 Store temperature 2
arrangement/heat.circuits/HC Module/TST2
Display range: -30.0°C ... +200.0°C
The remote control (RTA11-M) allows manual adjustment
of the heating curve (±15 K). The remote control is option-
al and it is not included in the full kit.
The heating circuit can be switched off manually, if the
remote control is set to the position “heating circuit off”.
Flow temperature is boosted to maximum for rapid warm-
up when the remote control is set to “rapid warm-up”.
The adjustment of the value is to be exclusively effected at
the external remote control RESOL RTA11-M which has
to be activated from the DeltaSol
®M Version 1.10 on
in the heat.circuits/expert menu.
The value flow set temperature indicates the target value
of the flow temperature. The measured outdoor tempe-
rature and the chosen heating curve result in the flow set
temperature. The correction value of the remote control
as well as the day correction or the night correction are
also added up to the flow set temperature.
Flow set temperature = heating curve + remote controller
+ (day correction or night correction).
The store temperature indicates the temperature of the
store. If the temperature at the store sensor (S3) un-
derruns the flow set temperature by 4 K (factory setting),
the after-heating (R5)will be switched on.
It will be switched off again, if the temperature at the sen-
sor S3 exceeds the flow set temperature by 14K (factory
setting) .
This value will only be displayed if the option AH=Boiler is
selected. The switching condition specified in point 3.1.5 is
valid for both store sensors. This option enables a longer
after-heating runtime.
Adjustment channel for the night correction of the heating
circuit. Up to 21 weekly timers - depending on the system
- in which the flow set temperature is decreased by the
chosen temperature difference can be used for night cor-
rection.
arrangement/heat.circuits/HC Module/manual-corr.
Display range: -15.0 K ... +15.0 K

© RESOL 09005 HMK2.monen.indd
HKM2
11 |
3.1.8 Day correction
arrangement/heat.circuits/HC Module/Day Corr.
Adjustment range: -5 K ... +15 K
Factory setting: +5K
Adjustment channel for the day correction of the heating
circuit. The day correction is always active outside of
the three time frames of the night correction. The flow
set temperature is increased or decreased by the chosen
temperature difference.
Hei zkennlinie
20
40
60
80
100
120
140
-20-15 -10-505101520
Auße ntemperatur
V o r la u f t e m p e r a t u r
3, 0
2, 7
2, 4
2, 1
1, 8
1, 5
1, 2
0, 9
0, 6
0, 3
3.1.9 Flow maximum temperature
arrangement/heat.circuits/HC Module/Tflow max.
Adjustment range: 10°C ... 100°C
Factory setting: 50°C
Adjustment channel for the maximum allowable flow
temperature of the heating circuit. If the maximum flow
temperature is exceeded the heating circuit is shut down
(the mixer is shut down as well as the pump is shut down
depending on the selected option).
3.1.11 Mixer runtime The mixer is started up and shut down in accordance to
the deviation of the current flow temperature from the
flow set temperature. The mixer is activated for four
seconds in each case (factory setting). The pause is calcu-
lated from the deviation from the set value and the actual
value. This parameter allows the pulse operating time to
be matched to suit the valve operating time.
3.1.12 Summer operation
arrangement/heat.circuits/HC Module/SUMMER
Adjustment range: 0 °C ... 40 °C
Factory setting: 20 °C
Adjustment channel for summer operation. If the outdoor
temperature exceeds the set value, the heating circuit is
switched off.
3.1.13 Domestic hot water priority
arrangement/heat.circuits/HC Module/D.H.W. priority
Adjustment range: “Yes”, “No”
Factory setting: “No”
This function switches off the heating circuit during hot
water after-heating. For this purpose option domestic hot
water priority and option store charge control have to be
activated at the main controller.
Dependency of the flow temperature on the outdoor tem-
perature and the chosen heating curve.
Adjustment range: 0.3 ... 3.0
Factory setting: 1.0
3.1.10 Heating curve
heating curves
flow temperature in °C
outdoor temperature in °C
arrangement/heat.circuits/HC Module/Mixer
Adjustment range: 1 s ... 20 s
Factory setting: 4 s.

© RESOL 09005 HMK2.monen.indd
HKM2
|12
Switch-on temperature difference
After-heating (AH=Therm. or AH =Boiler)
If the temperature at the store sensor (S1, AH=Therm.) or
at both store sensors (S1 and S2, AH=Boiler), as the case
may be, underruns the flow set temperature by the value
∆TAH on, the after-heating (R5) is switched on.
3.1.15 HKM Expert
(from DeltaSol
®MSW-Version1.10on)
After-heating
a r r an g em ent/ h eat. c i rcu i ts / H C M o d u le /
HKM Expert/After-heating
Adjustment range:“None”,“Therm.”,“Boiler”
Factory setting:“None”
Remote Control
arrangement/heat.circuits/HC Module/
HKM Expert/MAN.-CORR.
Adjustment range: “Yes”, “No”
Factory Setting: “No”
If a RTA11-M remote control is connected, it has to be
activated in this menu (Adjustment: Yes).
Switch-off temperature difference
(AH=Therm. or AH=Boiler)
arrangement/heat.circuits/HC Module/
HKM Expert/∆TaH off
Adjustment range: -15 K ... +50 K
Factory setting: +4 K
The after-heating switches off if the temperature at the
store sensor (S1, AH=Therm.) or both store sensors (S1
and S2, AH=Boiler) exceeds the flow set temperature by
the value ∆TaH off.
Performance of the heating circuit pump when ex-
ceeding the flow maxiumum temperature
arrangement/heat.circuits/HC Module/HKM Expert/Pump
HKmax
Adjustment range: “On”, “Off”
Factory Setting: “Off”
With the adjustment OFF, the heating circuit pump is
switched off if the maximum flow temperature is reached.
With the adjustment ON, the heating circuit pump remains
switched on even if the maximum flow temperature is
reached. (Only the mixer will be shut down).
In this menu, the weather-compensated after-heating can
be activated. Select adjustment therm. (function refers
to S1) or boiler (function refers to S1 and S2). With the
adjustment NONE the function will be deactivated.
arrangement/heat.circuits/HC Module/
HKM Expert/∆TaH on
Adjustment range: -15 K ... +50 K
Factory setting: 4 K
The timer determines whether day correction or night
correction (set back) is used for changing the set flow tem-
perature. 21 different time frames (3 for each day) can be
set for night correction of the heating circuit.
If one of the time frames is set to ‘active’, night correction
will be active.
If none of them is active, the set flow temperature will be
adapted with day correction. The timers are pre-allocated
such that every day from 10:00 pm to 5:00 am (the following
day) night correction is activated.
The mode determines the operation mode of the timer:
Night/ day time frame for night correction
off / day time frame for heating circuit off
without timer deactivated
3.1.14 Timer:
arrangement/heat.circuits/heating circuit/timer/mode
Selection:“Night / Day”,“Off / Day”,“Without”
Factory setting:“Night / Day”
arrangement/heat.circuits/heating circuit/timer/t1(...21)-
on
Adjustment range: 00: 00 ... 00:00
Factory setting: 22:00 (t1 ... t7-on)
arrangement/heat.circuits/heating circuit/timer/t1(...21)-off
Adjustment range: 00: 00 ... 00:00
Factory setting: 05:00 (t1 ... t7-off)
Example: The night correction runs from Monday to
Tuesday from 22:00 to 6:00 andTuesday from 15:00 to 18:00,
when t1-on is set to mo,22:00, t1-off to tu,6:00 and t2-on
to tu,15:00 and t2-off to tu,18:00.

© RESOL 09005 HMK2.monen.indd
HKM2
13 |
3.1.16 Manual operation
The heating circuit and the heating circuit pump can be
switched on or off manually with the manual control
switch. In order to operate the HKM module at full ca-
pacity the manual control switch should be set to “Auto”.
With the help of parameter MM the relays can be switched
in different states:
MM0 = R1 on, R3 on
MM1 = R1 on, R2 on
MM2 = R1 on
Adjustment range: “0”, “Auto”, “I”
Factory setting: “Auto”
3.1.17 Operating control lamp - flashing codes
Constantly green: OK
Flashing red: Error
Sensor fault
5. Tips for fault localisation
4. Commissioning Please connect the power supply at first. The HKM2 mod-
ule passes through an initialisation phase during which the
operating control lamp is flashing.
Afterwards the module switches back to the normal mode
and indicates the flow temperature FL and the flow set
temperature FS.
If the heating circuit module does not work faultlessly,please
check the following points:
1. Power supply
If the operating control lamp is off, please check the power
supply of the controller.
The HKM2 is protected by a can fuseT4A which is accessible
and can be replaced by opening the cover of the housing
(spare fuse is enclosed in the accessory bag).
2. Manual control switch
For faultless use of the control of the HKM2 module the
manual control switch should be set to “Auto”.
3. Sensor faults If there is a malfunction caused by a sensor defect, it is
signalled by the operating control lamp flashing red and the
symbol being displayed. An error code for the affected
sensor is shown on the display. For checking the 3rd tempe-
rature sensor the pushbutton 1 must be pressed once.
Short-circuit: Short-circuit of a sensor cable with
indicaton of the respective temperature
sensor.The error code -888.8 is shown
in the display.
Broken cable: Broken sensor cable with indication
of the respective temperature sensor.
The error code 888.8 is shown in the
display.
Disconnected PT1000 temperature sensors can be checked
with an ohmmeter. Please check the resistance values cor-
respond with the table to the left.
Resistance values of
the Pt1000-sensors

© RESOL 09005 HMK2.monen.indd
HKM2
|14
5.1 Troubleshooting
Description of symptoms Possible causes / Solution
Heating is constantly on
- Please check if function “rapid warm-up process” at the
remote control is activated?
- Outdoor temperature sensor is faulty or not positi-
oned accurately? (see “sensor faults”)
- Temperature value for summer activity is set too high?
Heating is constantly off
- Please check if function “heating circuit off” at the
remote control is activated?
- Pump is set to “0” at the HKM2 (0ff)?
- Flow sensor fault? (see “sensor faults”)
- Temperature value for summer activity is set too low?
Heating heats very slowly - Adjusted value for mixer runtime is too low?
In spite of heating pauses, it is
constantly too warm
- Please check the adjusted heating curve, decrease it if
necessary.
- Flow maximum temperature is too high? Decrease it if
necessary.
- Please check the position of the remote control,
choose a ‘lower’ position if necessary.
- Adjusted value for day correction too high? Decrease it
if neccessary.
In spite of an active heating, it is
constantly too cold
- Adjusted heating curve too low?
Increase it if necessary.
- Flow maximum temperature is too low?
Increase it if necessary.
- Please check the settings of the remote control.
- Please check the adjusted time.
- Please check the adjustments of the time frames for
the night correction in order to prevent an unintended
temperature decrease.

© RESOL 09005 HMK2.monen.indd
HKM2
15 |
Accessory
Remote control RTA11-M
The remote control RTA11-M serves for the adjustment of the heating curve of the
controller. An increase of the heating curve causes also an increase of the flow set tem-
perature, a lowering stands for a decrease of the flow set temperature. Furthermore, the
remote control comprises the function “Heating circuit off” and “Rapid warm-up”.
Information concerning orders Item number
RTA11-M remote control 136 000 20
For the RESOL module HKM2 and the corresponding con-
troller precision temperature sensors in Pt1000 version
(FKP and FRP) are used
FK: 1,5 m weather- and temperature resistant silicone cable
for temperatures between -50 °C ... +180 °C, mostly used
for collectors.
Sensor types
Immersion sleeve: Available in different lengths (im-
mersion depth)
FK...60: 60 mm immersion depth, brass sleeve, chromed
FK...150: 150 mm immersion depth, copper sleeve, chro-
med
Cylindrical clip-on sensors: for optional tube diameter,
completed with strain relief
FK...21 or FR...21
Ensure good thermal contact of the sensor with the pipe
work by cleaning the contact area and by applying heat con-
ductive paste between sensor and pipe. In order to protect
the sensor cable against external temperature influences,
we recommend insulating the pipe.
Flatscrew sensors: For installation on flat surfaces
FK...9 oder FR...9
Ensure good thermal contact of the sensor with the pipe
work by cleaning the contact area and by applying heat con-
ductive paste between sensor and pipe. In order to protect
the sensor cable against external temperature influences,
we recommend insulating the pipe.
FR: 2.5 m PVC cable for temperatures between
-10 °C ... +80 °C, mostly used for stores.
Make sure that all electrical works are carried out according
to the relevant local and national regulations. The sensor
cables carry low voltages and they must not run together
in a cable conduit with cables carrying higher voltages than
50 V. The sensor cables can be extended up to 100 m,
but the cross-section area of the extended cable must be
1.5 mm² (or 0.75 mm² up to a cable length of 50 m); For lon-
ger cables and for a use in cable conduits, twisted two-wire
cables should be used.The sensors must not be in direct
contact with water, please always use immersion sleeves.
Note:
Push the sensor entirely into the sleeve and
tighten the screw slightly.

© RESOL 09005 HMK2.monen.indd
HKM2
|16
Notes
Distributed by:
Please note:
The design and the specifications are to be changed without notice.
The illustrations may differ from the original product.
RESOL - Elektronische Regelungen GmbH
Heiskampstraße 10
45527 Hattingen / Germany
Tel.: [phone] / 96 48 - 0
Fax: [phone] / 96 48 - 755
www.resol.de
[e-mail]
Reprinting / copying
This mounting- and operation manual including all parts is
copyrighted. Another use outside the copyright requires
the approval of RESOL - Elektronische Regelungen GmbH.
This especially applies for copies, translations, microfilms
and the storage into electronic systems.
Editor: RESOL - Elektronische Regelungen GmbH
Important notice:
We took a lot of care with the texts and drawings of this
manual and to the best of our knowledge they are cor-
rect.As faults can never be excluded, please note:Your own
calculations and plans, under consideration of the current
standards and directions should only be basis for your pro-
jects.We do not offer a guarantee for the completeness of
the drawings and texts of this manual - they only represent
some examples. They can only be used at your own risk.
No liability is assumed for incorrect, incomplete or false
information and / or any resulting damage.