Pichler PKOM4 Classic User manual

250 m3/h 1.300 Watt
1.300 Watt 4 persons
52 dB
0 dB
1112 kWh/annum
1112 kWh/annum
1112 kWh/annum
A
A-80%
A-60%
A-40%
A-20%
A+++
A++
A
A
B
C
D
E
F
G
+
A
B
C
D
E
F
G
L
2015 812/2013
PKOM4.S/F
Systematic ventilation.
COMFORT
VENTILATION
OPERATING AND
INSTALLATION INSTRUCTIONS
SYSTEM VENTECH PKOM4

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 2
© 2015 Copyright J. PICHLER GmbH
This document serves as the instruction manual for proper installation by a specialist company and to define designated use of
the plant by the user.
This document shall not be transferred, copied or distributed, fully or in part, or used for advertising purposes or handed over or
made accessible to third parties without our written consent.
Changes reserved: J.Pichler GmbH reserves the right without prior notice to change details and specifications of the unit in the
interest of ongoing development.
In the light of possible setting and printing errors but also in view of the need for ongoing technical changes, please understand
that we cannot be held liable for the correctness of this content. The General Terms and Conditions as amended shall apply.
J. Pichler Gesellschaft m.b.H.
9021 KLAGENFURT
Karlweg 5, Postfach 32
T+43 (0)463 32769

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 3
GENERAL
USER
SPECIALIST
Contents
GENERAL
1. Introduction Page 6
1.1 CUSTOMER SERVICE PAGE 6
2. Symbols used in this document Page 6
3. Designated use Page 7
3.1 PURPOSE PAGE 7
3.2 REQUIREMENTS FOR OPERATION WITH FIREPLACES PAGE 8
3.3 REQUIREMENTS FOR OPERATION WITH KITCHEN HOODS PAGE 8
3.4 LIABILITY PAGE 8
4. Warranty Page 9
5. Safety Page 9
5.1 SETTING UP THE UNIT PAGE 10
5.2 ELECTRICAL CONNECTIONS PAGE 10
5.3 SAFETY DURING OPERATION PAGE 11
USER
6. Product description Page 12
6.1 PKOM4 CLASSIC PAGE 12
6.2 PKOM4TREND PAGE 12
7. Functional diagrams Page 13
7.1 PKOM4 CLASSIC PAGE 13
7.2 PKOM4 TREND PAGE 13
8. View of unit Page 14
9. Filter service Page 14
10. Control unit Page 16
11. Operation Page 16

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 4
GENERAL
USER
SPECIALIST
SPECIALIST
12. Scope of supply, transport, storage and disposal Page 21
12.1 SCOPE OF SUPPLY PAGE 21
12.2 TRANSPORT AND PACKAGING PAGE 22
12.3 STORAGE PAGE 22
12.4 DISPOSAL PAGE 22
13. Layout sketch Page 23
13.1 PKOM4CLASSIC (RIGHT-HANDED VERSION) PAGE 23
13.2 PKOM4TREND (RIGHT-HANDED VERSION) PAGE 23
14. Dimensions Page 24
14.1 PKOM4CLASSIC PAGE 24
14.2 PKOM4TREND PAGE 24
15. Protecting the counterflow heat exchanger from freezing Page 25
15.1 HOT GAS PRE-HEATING BATTERY PAGE 25
15.2 GEOTHERMAL HEAT EXCHANGER PAGE 25
16. System extension with auxiliary heating Page 26
16.1 DUCT HEATING BATTERY PAGE 26
16.2 HEATING CIRCUIT MODULE PAGE 27
16.3 ROOM-TEMPERATURE SENSOR PAGE 27
17. Demand-driven air volume control Page 28
17.1 CO2SENSOR PAGE 28
17.2 HUMIDITY SENSOR PAGE 28

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 5
GENERAL
USER
SPECIALIST
18. Electrical connection Page 29
18.1 ELECTRICAL CONNECTION DIAGRAM PKOM4(LEFT VERSION) MAIN PCB & VENTILATION PCB PAGE 30
18.2 ELECTRICAL CONNECTION DIAGRAM PKOM4(RIGHT VERSION) MAIN PCB & VENTILATION PCB PAGE 31
18.3 ELECTRICAL CONNECTION DIAGRAM PKOM4HEAT PUMP PCB PAGE 32
19. Servicing and Cleaning Page 33
19.1 OVERVIEW OF SERVICING TASKS PAGE 33
19.2 CHECKING AND CLEANING THE COUNTERFLOW HEAT EXCHANGER PAGE 34
19.3 CHECKING AND CLEANING THE HEAT EXCHANGER AND CONDENSATE TRAYS PAGE 35
19.4 CHECKING AND CLEANING THE CONDENSATE DRAINAGE PAGE 35
19.5 INSPECTION OF THE HEAT PUMP CIRCUIT PAGE 36
19.6 HOUSEHOLD HOT WATER STORAGE TANK - SACRIFICIAL ANOD PAGE 36
19.7 PROOF OF SERVICING PAGE 36
20. List of parameters Page 37
21. Product fiches Page 39
21.1 HEAT PUMP COMBI UNIT: PKOM4.S/F PAGE 39
22. Technical specifications Page 40
22.1 VENTILATION PART WITH HEAT PUMP PAGE 40
22.2 HOT WATER PART WITH HEAT PUMP PAGE 40
22.3 ELECTRICAL PAGE 40
22.4 HOUSING PAGE 40
23. EC Declaration of Conformity Page 41

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 6
Dear Customer,
Thank you for purchasing a System Ven-
tech PKOM4type heat pump combi unit.
Keep this document in a safe place and
readily available at all times.
Troubleshooting and interventions in
the heat pump unit may only be done by
specialised companies with trained and
appropriately certified sta.
The unit is subject to ongoing impro-
vement and further development. Your
unit may therefore vary slightly from the
description in this Instruction.
Nameplate:
Please always keep the model and serial
number (see nameplate on unit) at hand
to use in case of queries or when orde-
ring spare parts.
Please contact us directly should you
have further questions.
2. Symbols used in this document
Please carefully read and
observe this Operating and
Installation Instructions to
ensure safe, reliable and economic ope-
ration of your unit.
The Passive House Institute is an indepen-
dent body that tests and certifies products
in respect of suitability for application in
passive houses. Products carrying the
“Passive House approved component”
certificate were tested in accordance
with uniform criteria, are comparable in
respect of their characteristics and are
of excellent quality in terms of energy
conservation.
SPECIALIST GENERAL
USER
Changes reserved
1. Introduction
Illustration: Example Nameplate
Please familiarise yourself with the
following Safety symbols. The symbols
will highlight warnings of danger and
potential hazards.
Note!
Attention! Ignoring this waning
may lead to injury or threat to
life and limb and/or damage
the unit.
Attention – High voltage!
Ignoring this warning may lead
to injury or threat to life and
limb.
1.1 CUSTOMER SERVICE Please contact the installer of your
ventilation and air conditioning system
or contact us directly for any questions
pertaining to the supplied heat pump
combi unit PKOM4System VENTECH.
J. Pichler Gesellschaft m.b.H.
9021 KLAGENFURT
Karlweg 5, Postfach 32
T [phone]

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 7
The System Ventech PKOM4type heat
pump combi unit is intended for in-
stallation in residential or industrial
buildings. It is a compact ventilation unit
with integrated heat pump module, used
for mechanical aeration and ventila-
tion of rooms and for air conditioning
(heating or cooling). The version with
storage tank will also heat and store the
household hot water supply.
Designated use includes the supply or
extraction of up to 250 m³/h of air.
The heat pump module comprising two
separately operating refrigeration sys-
tems will allow heating of the (drinkable)
hot water and simultaneously also heat
or cool the supply air.
The areas supplied with air will be
supplied with filtered and conditioned
fresh air. The extract air from bathroom,
toilet and kitchen will be discharged to
dispose of moisture and odours.
The extracted air must be free of
aggressive vapours and substances
causing wear. Any other use shall be
deemed contrary to designated use. The
manufacturer accepts no responsibility
for damages or consequential damages
arising from improper use.
Designated use shall also include servi-
cing as prescribed in the Operating and
Installation Instructions.
This unit is not intended for use by
persons, including children, with limited
physical, sensory or mental capacity or
who lack experience and/or the requisite
knowledge, unless under the supervision
of a person responsible for their safety
or instructing them on the use of the
unit. The unit is not suited for external
installation and shall only be installed
in suitable and temperature controlled
interior areas. The heat pump combi unit
is not suited for drying and baking out of
new buildings.
The System Ventech PKOM4
type heat pump combi unit is
not a ready-to-use product and
may only be switched on after proper
installation and linking into the ventila-
tion and air conditioning components.
Only qualified and instructed persons
shall work on and with the unit. Persons
transporting, setting up or working on
the unit must have read and understood
the Operating Instructions, especially
Chapter 5 “Safety”. The end user must
furthermore also be made aware of
potential hazards.
3.1 PURPOSE
3. Designated use
SPECIALIST GENERAL
USER
Changes reserved

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 8
The safety regulations and
standards must be heeded
when operating the unit in the
presence of room air dependent firepla-
ces. The supply of air for combustion in
a fireplace must be provided separately
where such fireplace draws on room air.
Proper operation of the PKOM4heat
pump unit requires that it must be
possible to shut o existing piping for
combustion air and flue gas systems of
fireplaces drawing in room air.
The PKOM4heat pump unit may only be
installed in rooms, homes and user units
of similar size containing fireplaces
drawing in room air provided
safety systems ensure that such fire-
places using liquid or gaseous fuels
cannot be used simultaneously with the
ventilation system of the dwelling or
provided the waste gas ducting for such
fireplaces will be monitored by safety
systems.
If the pressure in the room where the
fireplace is installed is more than 4 Pa
below external pressure, the extract air
system must automatically and safely
switch o.
3.2 REQUIREMENTS FOR OPERATION
WITH FIREPLACES
Due to high loading and irre-
gular operation, the air ext-
racted by a kitchen hood must
not be integrated in a home ventilation
system. Two options for operation of a
kitchen hood are possible:
A) The air extracted by kitchen hoods
may be separately discharged to the
atmosphere through exhaust air ducting,
taking into account corresponding inflow
of air (e.g. through window ventilation).
The balance of air volumes in the home
will be disturbed if a kitchen hood is
operated without a separate air supply.
Proper operation of home ventilation
system will thus not be assured (low
pressures, spreading odours, etc.).
B) The kitchen hood operates with circu-
lating air.
The PKOM4heat pump combi unit has
been developed and manufactured for
controlled mechanical aeration and
ventilation, with additional heating and
cooling of homes and rooms for similar
use, such as seminar rooms and small
oces. The heating power for household
hot water is designed for average hot
water requirements (nominal usage
profile L as per EN 16147).
Any other use shall be deemed improper
and may cause personal injury or dama-
ge to the PKOM4heat pump combi unit,
for which the manufacturer shall accept
no liability.
The manufacturer shall accept no liability
for any damages due to:
• Non-observance of the Safety,
Operating and Servicing instructions
in these Operating and Installation
Instructions
• Installation of spare parts not supplied
by the manufacturer, whereby the
responsibility for the use of such spare
parts shall rest with the installer of the
equipment.
• Normal wear and tear
Do not use the PKOM4heat pump combi
unit unless in perfect condition and use
only as designated; be aware of safety
issues and potential hazards and famili-
arise yourself with the notes and infor-
mation contained in these Instructions.
3.4 LIABILITY
3.3 REQUIREMENTS FOR OPERATION
WITH KITCHEN HOODS
USER GENERALSPECIALIST
Changes reserved

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 9
Our General Terms and Conditions shall
strictly apply. The warranty period shall
commence after commissioning (date
of record of commissioning) but no later
than one month after delivery and shall
remain in force for 24 months maximum.
The manufacturer warrants full replace-
ment of material in the event of material
and/or manufacturing defects becoming
evident during the warranty period. No
claims shall, however, be recognised for
compensation of services or replacement
based on loss of comfort.
The warranty shall be subject to proof of
services performed as per our instruc-
tions by a specialist and licensed installa-
tion company.
In the event of a warranty claim, the
PKOM4 heat pump combi unit shall not be
uninstalled without prior written consent
of the manufacturer. The manufacturer‘s
liability for spares shall be limited to
parts installed by an installation company
approved by the manufacturer.
The warranty shall automatically lapse at
the end of the warranty period, following
improper operation (such as operation
with a very dirty or no filter), if parts other
than original parts supplied by the manu-
facturer are installed, or if unauthorised
changes or modifications have been made
to the plant.
The warranty shall furthermore automa-
tically lapse unless these Operating and
Installation Instructions are heeded.
5. Safety
Do not use the heat pump combi unit
unless in perfect condition and use
only as designated; be aware of safety
and potential hazards and familiarise
yourself with the notes and information
contained in these Instructions.
Keep the Operating and Installation
Instructions near the unit. The specifica-
tions given in this document must not be
changed.
Non-observance of these
Safety regulations, warnings,
notes and instructions during
installation, servicing or general work on
the unit may result in personal injury or
damage the heat pump combi unit.
Installation, commissioning,
servicing and repairs may
only be carried out by an au-
thorised specialist company (specialised
heating/installation company). Over and
above these Operating and Installation
Instructions, the local and national re-
gulations and generally applicable stan-
dards shall also be applicable without
limitation to the operation of this unit.
When installation is complete, please
request the installer of the plant to ins-
truct you on the unit and its controller.
The heat pump combi unit may only be
used compliant with Chapter 3 “Designa-
ted use”.
All safety signs and warnings axed
to the unit or included in these instruc-
tions must be observed.
Any potentially unsafe opera-
tion of the unit is prohibited!
To ensure safe operation,
safety devices must not be
removed or bypassed.
SPECIALIST GENERAL
USER
Changes reserved
4. Warranty

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 10
Regulations:
All national and local regula-
tions must be complied with
when installing and setting up
the unit. The unit may only be installed
compliant with the national installation
regulations and the general locally ap-
plicable building, safety and installation
regulations of the relevant local authori-
ties or the water and electric utility and
other facilities.
Observe the local building and fire
protection provisions, regulations and
standards. If necessary, appropriate
measures should be taken when instal-
ling the unit on site, e.g. by including fire
shutters in air ducts, etc.
Electrical connections and
work on electrical plant
components may only be
carried out by authorised electricians
and in compliance with national and local
regulations.
Before opening the unit and whilst carry-
ing out any servicing or repairs etc., iso-
late the unit from mains (isolate all poles
of the power supply) and secure against
accidental switch-on before work on the
unit is complete.
The electrical system with the warning
and protective functions of the unit must
be regularly checked for perfect func-
tionality. The unit must be shut down
immediately in the event of malfunctions
in the electrical power supply or detec-
ted defects such as loose connections or
overheated cables.
Damaged or faulty power supply cables
to the unit must be repaired immediately
to avert potential danger.
The unit may not be operated unless
safe operational conditions have been
restored.
Fault finding and immediate remediation
of defects may only be carried out by
authorised electricians.
5.2 ELECTRICAL CONNECTIONS
USER GENERALSPECIALIST
Changes reserved
5.1 SETTING UP THE UNIT

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 11
To guarantee safe plant operation,
safety devices and covers may must
remain functional and may not be by-
passed or removed.
Malfunctions:
In case of malfunctions, faults or dama-
ge to the heat pump combi unit possibly
hazardous to persons or objects, switch
o the unit immediately and secure
against accidental switch-on.
Further operation must be eectively
prevented until repairs have been made!
Faults must be remedied immediately!
After repairs and servicing, qualified
sta must verify that the unit is safe to
operate.
The heat pump combi unit may
only be operated if all requisite
connections together with the
supplied subassemblies such as sound
dampener etc. are set up properly.
The plant must be shut down
immediately in case of mal-
functions, fault messages
or damage hazardous to persons or
objects. Further operation must be
eectively prevented until repairs have
been made!
Service:
The heat pump combi unit must be checked
and serviced regularly; it is advisable to
conclude a service agreement with your
specialised company.
Spare parts:
Attaching or installing additional com-
ponents and assemblies is not allowed.
Exclusively original spare parts shall be
used.
Filter:
The heat pump combi unit may never be
operated without an air filter. Air filters
must be checked regularly for dirt and
damage. They must be replaced when
the “Replace filter” message is shown on
the control unit. Depending on applica-
tion, filters must be replaced two to four
times a year.
Use only original replacement filters.
If the plant is not used in summer, the
air filters must for hygienic reasons be
replaced prior to re-commissioning.
Health hazards posed by escaping ref-
rigerant and refrigerant oil: The unit is
designed such that the refrigerant can
never come into contact with drinking
water, even in case of leaks in the refri-
geration cycle. Leakages may, however,
cause the refrigerant to enter the atmos-
phere.
• Never inhale gases or vapours.
• Avoid skin and eye contact
Refrigerant directly at the point
of leakage may cause freezing
in case of body contact. Wear
protective gloves when working on the
refrigeration cycle!
5.3 SAFETY DURING OPERATION
SPECIALIST GENERAL
USER
Changes reserved
Spare filter

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 12
6. Product description
USER GENERAL
SPECIALIST
Changes reserved
One device, 4 benefits:
Ventilating – heating – cooling – hot water
The PKOM4heat pump combi unit uni-
tes these four functions on a footprint of
less than 0.75 m². Controlled ventilation
of living rooms will constantly ensure
fresh and filtered outside air in the
rooms and ensure hygienic exchange of
air. The highly ecient heat recovery
system is also optionally available as a
design with recovery of waste air humi-
dity. To prevent overly high summer
temperatures in the living rooms, heat
recovery may also be bypassed during
cooler night hours by means of a bypass
flap.
We dierentiate between 2 versions:
• PKOM4classic: Version with household
hot water.
• PKOM4trend: Version without
household hot water.
6.1 PKOM4 CLASSIC The PKOM4classic heat pump combi
unit is the preferred compact overall
solution for passive house construction
homes with up to 130 m² living area. The
volume of household hot water will com-
fortably provide for a family of 4.
A controlled heat pump will in addition
condition the supply air, i.e. heated or
cooled on demand. Another heat pump is
used for ecient provision of household
hot water. Both heat pumps may be ope-
rated in parallel to ensure uninterrupted
provision of air and water.
6.2 PKOM4TREND Household hot water storage and the
associated heat pump are omitted in the
PKOM4trend unit version. The PKOM4
trend heat pump combi unit is the best
alternative to conventional living room
ventilation units. The supply air into the
living rooms will be cooled and dehumi-
dified during summer, as needed. The
supplied air will be heated in the colder
months.

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 13
7. Functional diagrams
1 Outdoor air filter M7
2 Outdoor air fan
3 Pre-heater battery for outdoor air
4 Air volume measurement, extract air
5 Extract air filter M5
6 Extract air fan
7 Bypass flap with servo motor
8 Counterflow heat exchanger
9 Outdoor air/exhaust air flap with servo motor
10 Heat exchanger in exhaust air
11 Outdoor air/exhaust air flap with servo motor
11 Heat exchanger in supply air
13 Air volume measurement, supply air
14 Compressor with frequency converter (HC circuit)
7.1 PKOM4 CLASSIC
USER GENERALSPECIALIST
Changes reservedChanges reserved
dp dp
M
M
M
dp
O
utdoor air / ODA
Exhaust air / EHH
Extract air / ETH
Supply air / SU
P
Heatpump circuit,
domestic hot water (DHW)
Heatpump circuit, ventilation
(HC heating cooling)
123
8
765 4
13
12
11
9
10
22
14
20
18 16
15 19
25
23
24
21
17
15 4-way switching valve (HC circuit)
16 Control valve pre-heating battery (HC circuit)
17 Solenoid valve, defrosting (HC circuit)
18 Expansion valve, heating (HC circuit)
19 Expansion valve, cooling (HC circuit)
20 Compressor circuit (DHW circuit)
21 Solenoid valve, defrosting (DHW circuit)
22 Expansion valve (DHW circuit)
23 Domestic hot water storage tank
24 Heating battery in domestic hot water storage tank
25 Electrical heating, domestic hot water
DHW = Circuit for domestic hot water
HC = Circuit for supply air (heating / cooling)
7.2 PKOM4 TREND
dp dp
M
dp
O
utdoor air / ODA
Exhaust air / EHH
Extract air / ETH
Supply air / SU
P
Heatpump circuit, ventilation
(HC heating cooling)
123
8
765 4
13
12
10
14
18 16
15 19
17

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 14
SPECIALIST GENERAL
USER
Changes reserved
Clean and hygienic air filters are a pre-
requisite to high quality air. Unserviced
or poorly serviced filters significantly
aect living comfort and increase power
consumption of the fans. Heavily soiled
filters may cause faults and malfunc-
tions of the heat pump combi unit.
The condition of the air filters
must be checked regularly!
When must filters be replaced?
In your own interest you should check
and replace the filters regularly. The
extent of soiling of the filters varies
depending on location, ambient and
weather conditions and how the unit is
operated. The filters must be replaced
immediately if heavily soiled.
9. Filter service
8. View of unit
741 mm
735 mm
735 mm
741 mm
2012 mm
1290 mm
Filter inspection flap
WHAT TASK INTERVAL WHO
Filter service Check / replace ca. 2-3 times p.a. User / technical sta

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 15
The control unit will regularly
remind you of a filter service!
Reset the filter message on the control
unit after each filter replacement!
Must both filters always be replaced?
This is recommended since only the
dust particles are detected with visual
checks. Invisible micro particles and
germs may nevertheless accumulate in
the filter.
How are filters replaced?
Simply, by hand:
1. Open the two fasteners on top of the
unit and carefully tilt the inspection flap
down.
2. Remove the two push-pull devices.
3. Then remove the dirty filter.
4. Insert the new filter.
Note air direction when inser-
ting the new filter. This is indi-
cated on the filter by an arrow.
5. Insert the push-pull device again.
6. Close the inspection flap and the
fasteners.
7. Reset the filter replacement time
counter. See Chapter 11 „Operation“ for
details.
Where do I order the filters?
Use only original replacement filters and
note the specified filter quality class.
USER GENERAL
SPECIALIST
Changes reserved
Please replace
air filter
Remind later
Filter replaced
J. Pichler Gesellschaft m.b.H.
9021 KLAGENFURT
Karlweg 5, Postfach 32
T [phone]
fi[email protected]
Item Item number
Extract air filter M5 synthetic 40LG050280
Outside air filter F7 glass fibre 40LG050290

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 16
PKOM4heat pump combi unit operation
is simple and clear via a TFT touch dis-
play. It should be installed in the centre
of the residential building for good con-
trol and overview of messages.
The integrated temperature sensor
records the current room temperature
to properly regulated heating or cooling
of the supply air.
The temperature sensor is
located at the bottom of the
control unit. To ensure cor-
rect and pertinent room temperature
recording, it is important to position the
control unit such
• that it is not subjected to direct sun-
light
• that it is not located directly above/
next to a heat source (e.g. room hea-
ter).
To change the date or time, go to Set-
tings in the Menu. Switching between
summer and winter time is done auto-
matically.
SPECIALIST GENERAL
USER
Changes reserved
10. Control unit
Illustration: Wall mounted control unit „TOUCH“
1 – DATE AND TIME
11. Operation All PKOM4heat pump combi units are
preconfigured ex factory and may in
principle be operated without changing
any settings. The top level is always
the main overview (Home screen). The
main information is displayed here at a
glance.
Illustration: Control unit - overview
1 Date and time
2 Current operating mode
3 Ventilation level
4 Room temperature
5 Hot water
6 Menu

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 17
USER GENERALSPECIALIST
Changes reserved
Press the button to change
the selected operating mode.
Dierent modes are available:
• O: The plant is switched o.
• Automatik: automatic switching bet-
ween winter and summer operation.
The drawn in fresh air (outdoor air) is
viewed over 24 hours. If it is below the
heating limit temperature, the controller
switches to winter operation. If above, it
switches to summer operation.
Summer:
The heat pump will not heat in this ope-
rating mode (except for frost protection!).
Active cooling using the heat pump may
optionally be enabled or blocked. The
household hot water will be heated by
the heat pump.
Winter:
In this operating mode the heat pump
will heat whenever necessary. Cooling
will be blocked. The household hot water
will be heated by the heat pump.
Vacation:
The heat pump will heat in this operating
mode. Cooling will be blocked. Hot water
operations will be blocked. A desired
room temperature may be entered for
the period of absence specifically. The
time of your return may also be set. On
the day you return, the program will au-
tomatically switch to the operating mode
selected prior to vacation mode.
Hot water:
Only water heating for domestic use will
be active in this mode of operation. The
ventilation system and the heat pump
for heating and cooling will remain
disabled.
Frost protection: Should the
room temperature fall below
10°C or the outdoor tempera-
ture fall below the frost protection limit,
the heat pump will automatically switch
on and heat.
2 – CURRENT OPERATING MODE (DIS-
PLAY = CURRENT OPERATING MODE)
3 – VENTILATION LEVEL (DISPLAY =
CURRENT VENTILATION LEVEL)
The desired ventilation level
may be changed by pressing
this button.
Automatic:
Die Anlage läuft mit den im Zeitpro-
gramm hinterlegten Lüftungsstufen.
Ventilation level 1:
The plant will permanently run at level 1.
Ventilation level 2:
The plant will permanently run at level 2.
Ventilation level 3:
The plant will permanently run at level 3.
Ventilation level 4:
The plant will permanently run at level 4.
Heat pump operation: when the
heat pump runs in heating or
cooling mode, level 3 ventilati-
on level will always be activated for this
period. A minimum volume of air will be
required to convey the required heating
or cooling energy.

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 18
SPECIALIST GENERAL
USER
Changes reserved
The room temperature may be
adjusted quickly by pressing
this button.
Desired room temperature:
The desired room temperature may be
set here if automatic mode is switched
“o”.
Room sensor:
Switching this to “o” will use the ext-
ract air temperature for room tempera-
ture control.
4 – ROOM TEMPERATURE
(DISPLAY = CURRENTLY MEASURED
ROOM TEMPERATURE)
Pressing this button will allow
quick adjustments to hot water
operation.
Hot water required::
Set the desired hot water temperature
here.
Enable E-heating:
The electric heating element may be
enabled/disabled Enabling electrical
heating will allow higher water tempe-
ratures. Enabling electrical heating will
ensure hot water even should the heat
pump fail.
Quick heating:
Once-o electrical heating of the hot
water tank to a higher temperature.
This possible only if electrical heating is
enabled!
5 – HOT WATER
(DISPLAY = CURRENTLY MEASURED
HOT WATER TEMPERATURE)
Change to menu level.6 – MENU
Illustration: Control unit - Main menu

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 19
USER GENERALSPECIALIST
Changes reserved
This sub-menu contains all the
relevant information for opera-
tion of the heat pump unit.
Air:
Information on the ventilation part and
the associated heat pump.
Hot water:
Information on the hot water part and
the associated heat pump.
Additional function:
Information on optional solar heating
circuit or duct heating battery.
Energy balance:
Information on the electrical energy con-
sumption over the past 12 months.
Malfunctions:
Display of present malfunctions and the
history of reported malfunctions.
Software & Kommunikation:
Display of the current installed software
versions.
1 – INFORMATION
Settings may be made in this
submenu.
a) Air volumes
• Ventilation level 1: desired supply air
volume [m³/h]
• Ventilation level 2: desired supply air
volume [m³/h]
• Ventilation level 3: desired supply air
volume [m³/h]
• Ventilation level 4: desired supply air
volume [m³/h]
• Balance extract air: Setting for dierent
supply and extract air volumes. A
setting of -10% will mean, for instance,
that the extract air volume should be
10% less than the supply air
• Timing schedule: Programming the
timing schedule
Programming the timing schedule
1 – Sub-menu
2 – Day on which the time schedule
applies
3 – Starting time for the selected venti-
lation level or temperature
4 – Second starting time for the selected
ventilation level or temperature
5 – A third starting time may be selected
6 – The schedule for this day will be
applied on all days of the week
b) Room temperature:
• Normal: Desired room temperature in
winter
• Reduced: Desired reduced room tempe-
rature in winter (e.g. at night)
• Cooling: Desired room temperature
when cooling with the heat pump in
summer. Displayed only when cooling
is enabled.
• Timing schedule: Programming the
timing schedule
c) Heating:
• Heating enabled: heating by the heat
pump will be enabled if the outside
temperature falls below the tempera-
ture set here.
2 – SETTINGS
Illustration: Control unit – timing schedule

OPERATING AND INSTALLATION INSTRUCTIONS SYSTEM VENTECH PKOM4PAGE 20
SPECIALIST GENERAL
USER
Changes reserved
d) Cooling:
• Enabling cooling: Cooling by the heat
pump will be enabled if the outside
temperature rises above the value set
here.
e) Hot water:
• Legionella protection: Thermal disinfec-
tion of the drinking water may be ac-
tivated/deactivated. With the function
activated, the hot water will be heated
to over 65°C.
• Enabling hot water: Heating of the
hot water tank by the heat pump and
electrical heating will be enabled
during the selected period. Operating
costs will be reduced especially when
disabled at night in combination with
solar systems.
f) Additional function:
• Enabling time Heating circuit: The hea-
ting circuit pump of the optional PKOM4
HBK33 heating module will be enabled
for the selected period.
Info: The pump will run provided the
tank has sucient water and heating is
required.
g) Date and time: Setting the current
date and time.
h) German: Changing the language
Info: The filter change message will
normally appear after ca. 2900 hours or
operating.
3 – ACTIONS Filter change complete::
Early reset of the timer for filter
change