COSMOGAS FRYO-6PI Service manual

62403835 - R00 21-10-2020_UK
INSTALLATION, USE
AND MAINTENANCE
MANUAL
FRYO-6PI
FRYO-9PI
FRYO-13PI
monobloc
Inverter Air to Water
Heat Pump Unit

3FRYO PI
COSMOGAS
CONTENTS
1 - SAFETY INSTRUCTIONS ..............................................................................................................................5
1.1 - National installation laws.......................................................................................................................................... 6
2 - GENERAL INFORMATIONS...........................................................................................................................7
2.1 - Overview of models.................................................................................................................................................. 7
2.2 - Accessories included................................................................................................................................................ 7
2.3 - Distributor................................................................................................................................................................. 8
2.4 - Key to symbols used ................................................................................................................................................ 8
2.5 - Maintenance............................................................................................................................................................. 8
2.6 - Disposal ................................................................................................................................................................... 8
3 - MAIN COMPONENTS.....................................................................................................................................9
4 - FUNCTION OVERVIEW ...............................................................................................................................10
4.1.- Intended use and functions ................................................................................................................................... 10
4.2 - Installation examples.............................................................................................................................................. 12
4.2.1 - Direct connection to the system................................................................................................................ 12
4.2.2 - Connection with pu󰀨er tank in series ........................................................................................................ 13
4.2.3 - Connection with pu󰀨er tank in parallel ...................................................................................................... 14
4.2.4 - Connection with DHW production plus semi-rapid pu󰀨er tank plus solar (optional) ......................................15
4.2.5 - Connection with DHW production (single coil tank loaded by plate heat exchanger) plus solar (optional)
plus direct connection to the system .................................................................................................................... 16
5 - INSTALLATION .............................................................................................................................................17
5.1 - Opening the package ............................................................................................................................................. 17
5.2 - Dimensions ............................................................................................................................................................ 17
5.3 - Minimum clearance distances................................................................................................................................ 20
5.4 - Choosing the installation location........................................................................................................................... 21
5.5 - Condensate drain assembly................................................................................................................................... 21
5.6 - Mounting the appliance .......................................................................................................................................... 21
5.7 - Electrical connections ............................................................................................................................................ 22
5.7.1.- Display installation in a remote position.................................................................................................... 23
5.7.2.- Installation of the DHW sensor (Tw) on the storage tank.......................................................................... 24
5.7.3.- Integrative electrical resistance connection .............................................................................................. 24
5.7.4.- Connection of “Tc” and “Th” sensor to a pu󰀨er ......................................................................................... 25
5.8 - Hydraulic connections ............................................................................................................................................ 26
5.8.1 - Filter .......................................................................................................................................................... 26
5.8.2 - Connect the water system lling ............................................................................................................... 26
6 - START-UP.....................................................................................................................................................27
6.1 - Before starting ....................................................................................................................................................... 27
6.2 - Start-up .................................................................................................................................................................. 27
7 - USE...............................................................................................................................................................28
7.1 - Introduction to the display ...................................................................................................................................... 28
7.2 - Basic operation ...................................................................................................................................................... 29
7.2.1 - Switch on and o󰀨 the appliance ................................................................................................................ 29
7.2.2 - Time setting............................................................................................................................................... 29
7.2.3 - Heating / cooling / DHW operation mode.................................................................................................. 30
7.2.4 - Setting the setpoint temperature in heating / cooling / DHW .................................................................... 31
7.2.5 - Timer ......................................................................................................................................................... 32
7.2.6.- Restore the parameters to the factory values ........................................................................................... 32
7.3 - Sensors and system informations .......................................................................................................................... 33
7.4 - User parameter ...................................................................................................................................................... 34
7.4.1 - Outdoor reset ............................................................................................................................................ 35
7.5 - Advanced Mode parameters .................................................................................................................................. 36
8 - DIAGNOSTIC................................................................................................................................................40
9 - MAINTENANCE ............................................................................................................................................46
9.1 - General recommendations..................................................................................................................................... 46
9.2 - Cleaning the water lter ......................................................................................................................................... 46
9.3 - Cleaning the plate heat exchanger ........................................................................................................................ 46
9.4 - Cleaning the evapo-condensing battery................................................................................................................. 46
9.5 - Replacement of the circulation pump..................................................................................................................... 47
9.6 - Access to control boards........................................................................................................................................ 48
9.7 - Replacing the fan motor ......................................................................................................................................... 49
9.8 - Replace the machine oor heater wire................................................................................................................... 50
9.9 - Troubleshooting...................................................................................................................................................... 51
9.10 - Wiring diagram of model 6 kW and 9 kW............................................................................................................. 52

4
FRYO PI COSMOGAS
CONTENTS
9.11 - Wiring diagram of model 13 kW ........................................................................................................................... 54
10 - TECHNICAL DATA ......................................................................................................................................56
11 - EU CONFORMITY DECLARATION ............................................................................................................57

5FRYO PI
COSMOGAS
1 - SAFETY INSTRUCTIONS
WARNING !!!
The installation, disassembly and
maintenance of this appliance must
be done by a qualied installer. It is
forbidden to make any changes to
the structure of the appliance. Failure
to comply with these provisions can
cause damage to people, animals or
things.
WARNING !!! Disconnect the
appliance from the power supply at
least one minute before accessing
the electrical components. Before
touching the electrical components,
it is however recommended to
measure the voltage across the
terminals to make sure it is lower
than the safety voltage.
WARNING !!!
A hot water temperature level
exceeding 51°C may cause permanent
injury/damage to persons, animals
and objects. In particular, protect
children, the elderly and people with
disabilities against any possible
risks of scalds, by inserting devices
that limit the usage temperature of
the DHW to users.
WARNING !!!
Use a dedicated electric socket for
this appliance. Failure to do so could
cause malfunctions.
WARNING !!!
The power supply of this appliance
must be grounded.
PROHIBITION !!!
Do not touch the air outlet grill when
fan motor is running.
PROHIBITION !!!
It is forbidden to touch the electric
plug with wet hands and disconnect
the electric plug by pulling the cable.
PROHIBITION !!! Water or any
kind of liquid is strictly forbidden
to be poured into the product, or
may cause electric creepage or
breakdown of the product.
WARNING !!!
If the electric cable appears
deteriorated or damaged, it must be
replaced by a qualied technician.
PROHIBITION !!!
Use the proper fuse and breaker. It
is forbidden to use copper or steel
wires to replace the fuse or switch.
PROHIBITION !!!
Do not touch the ns of the evapo-
condensing battery, they can hurt
your ngers.
WARNING !!!
Provide a bipolar switch with a
contact opening distance of at least
3 mm in the vicinity of the appliance,
as required by current regulations.

6
FRYO PI COSMOGAS
1 - SAFETY INSTRUCTIONS
WARNING !!!
Read this manual carefully before
using the appliance.
1.1 - National installation laws
Respect the national regulations, provisions, directives and
laws in force.
WARNING !!! All the drawings
shown in this manual relating to
electrical, hydraulic or gas installation
systems must be understood to
be purely illustrative. All the safety
devices, auxiliary devices and the
diameters of the electrical, hydraulic
and gas pipes must always be
checked by a professionally qualied
technician, to make sure they satisfy
the applicable laws and regulations.

7FRYO PI
COSMOGAS
FRYO X-Pi
Inverter air to water heat pump unit
6 = maximum heat output 6 kW;
9 = maximum heat output 9 kW;
13 = maximum heat output 13 kW;
Monoblock air to water heat pump
2 - GENERAL INFORMATIONS
2.1 - Overview of models
2.2 - Accessories included
The appliance is supplied with the following accessories:
Quantity Description Figure
1Tw - DHW temperature sensor (already factory tted in the electrical panel) and extension
cable for DHW temperature sensor
1Extension cable to remote the display (10 meters)
4 Caps for bottom water drain
1Condensate drain connection
1 Condensate drain pipe

8
FRYO PI COSMOGAS
2.3 - Distributor
COSMOGAS srl
Via L. da Vinci 16
47014 - Meldola (FC) Italy
Tel. [phone]
Fax. [phone]
www.cosmogas.com
[email protected]
2.4 - Key to symbols used
WARNING !!!
Electric shock hazard Failure to comply with these
warnings may compromise the working order of the
appliance or cause serious damage or injury to persons,
animals or objects.
WARNING !!!
Failure to comply with these warnings may compromise the
working order of the appliance or cause serious damage or
injury to persons, animals or objects.
PROHIBITION !!!
Generic hazard. Failure to comply with these warnings may
compromise the working order of the appliance or cause
serious damage or injury to persons, animals or objects.
Important indication symbol.
N/A : Not applicable.
2.5 - Maintenance
A regular annual maintenance check on the appliance is
advised for the following reasons:
- to maintain high e󰀩ciency and manage the central heating
system economically (with low fuel consumption);
- to achieve a high level of safety operation;
2.6 - Disposal
The crossed wheelie bin symbol means that the product
must not be thrown away in the ordinary rubbish bin (i.e. in
with “mixed urban rubbish”); it must be dealt with separately,
in order to undergo suitable operations for it to be reused
or threated, so that any substances that are dangerous
for the environment can be removed and safely disposed.
This will enable all the raw materials to be recycled. The
user is responsible for getting rid of the boiler at the end
of its life, delivering it to a recycling centre run by the local
authority or city hygiene companies, or, when he/she buys
a new appliance, giving the product that has been replaced
to the dealer, who is obliged to take it under the terms of
EU Directive 2012/19/EU. For further information regarding
correct decommissioning of these units, users can contact
the public service in charge or retailers.
2 - GENERAL INFORMATIONS

9FRYO PI
COSMOGAS
1 - Air inlet
2 - Air outlet
3 - Display
3 - MAIN COMPONENTS
4 - Electrical connection compartment
5 - Water outlet (diam. 1”)
6 - Water inlet (diam. 1”)
7 - Automatic air vent
Figure 3-1 - Main components
1
126
5
3
4
7

10
FRYO PI COSMOGAS
4 - FUNCTION OVERVIEW
4.1.- Intended use and functions
This product is an appliance designed for the production of
domestic hot water (DHW) and conditioning of small and
medium-sized civil and residential environments.
It consists of a reversible circuit inside which a refrigerant uid
is contained, which evaporates inside the plate heat exchanger
and condenses inside the evapo condensing battery. On the
other side of the plate heat exchanger, by means of the pump
inside the machine, the water (heat carrier) is circulated,
intended for internal users, such as fan coils, underoor
radiant panels, etc.
It is possible to connect an integrative heat source to improve
the heat output.
The appliance must operate with a di󰀨erence temperature
of 5 ° C between the supply temperature and the return
temperature, which is only guaranteed with a correct sizing
of the hydraulic system; the designer will have to evaluate
all the pressure drops existing in the system, which must be
lower than the available pressure drops (see Figure 5-20)
for the water ow rate. An incorrect sizing of the system is
one of the cause of the intervention of the low water ow
detector.
The evapocondensing battery has the task of dissipating the
heat taken from the rooms or absorbing heat from the outside,
in the heat pump cycle (HP); for this purpose, the unit must
be properly ventilated respecting the installation distances as
indicated in section 5.3.
There is only water circulating between the unit and the heat
radiators. This ensures greater safety in the unlikely event of
a refrigerant gas leak, which in any case is dispersed outside.
The refrigeration cycle inside the air conditioner is activated
by the compressor.
• This air conditioner is used to cool water up to a temperature
of 7 ° C. In the case of heat pump, it can heat the water up
to a maximum of 55 ° C.
• It must be connected to an heating/cooling system
compatible with the characteristics, performance and power
of the appliance itself.
• Before installation, it is necessary to thoroughly wash
the hydronic system, in order to remove any residues or
impurities that could compromise the proper functioning of
the appliance.
WARNING !!! Refer to section 5.8 regarding the
sizing of the hydraulic system. Failure to comply with this
requirement causes malfunction of the air conditioner.
WARNING !!! Refer to section 5.3 as regards the
minimum distances of respect. Failure to comply with this
requirement causes malfunction of the air conditioner.

11 FRYO PI
COSMOGAS
Figure 4-1 - Functional schematics
1
17 14
13 12
11
9
10
8
15
16
7
654
3
25
LEGEND of Figure 4-1:
1 - Evapo-condensing battery
2 - Room temperature sensor (N/A)
3 - 4-way valve
4 - High pressure gauge (in some models it may not be present)
5 - High pressure switch
6 - Compressor discharge temperature sensor
7 - Suction temperature sensor
8 - Plate heat exchanger
9 - Automatic air vent
10 - Supply temperature sensor
11 - Pump
12 - Water ow switch
13 - Return temperature sensor
14 - Refrigerant temperature sensor
15 - Compressor
16 - Liquid separator (only in model 13)
17 - Filter
18 - Outdoor temperature sensor
19 - High pressure sensor
20 - Low pressore sensor
21 - Electronic expansion valve
22 - Cooling temperature sensor (Tc)
23 - Heating temperature sensor (Th)
25 - Evapo-condensing battery temperature sensor
26 - DHW temperature sensor (Tw)
27 - Liquid receiver
28 - EEV board low pressure sensor (only in model 13 kW)
29 - EEV board suction temperature sensor (only in model 13 kW)
30 - Liquid separator
31 - Appliance oor wire heater
23
22
19
20
21
18
2 26
4 - FUNCTION OVERVIEW
27
ColdHot
Hot
Cold
ColdHot
28
29
30
31

12
FRYO PI COSMOGAS
4.2 - Installation examples
4.2.1 - Direct connection to the system
Figure 4-2 - Hydraulic diagram with direct connection to the system
LEGEND of Figure 4-2:
1 - Heat pump
2 - Filter
3 - Pressure safety valve
4 - Pressure meter gauge
10 - System lling water inlet
11 - Non-return valve
12 - Heating / cooling supply manifold
13 - Heating / cooling return manifold
18 - Expansion tank
40 - E/I = Summer / winter diverter (to be provided if the machine is both heating and cooling).
41 - TA = RT Room Temperature
 No settings need to be changed for operation with this diagram.
 Items “2” to “18” must be eld supplied.
4 - FUNCTION OVERVIEW

13 FRYO PI
COSMOGAS
4.2.2 - Connection with pu󰀨er tank in series
Figure 4-3 - Hydraulic diagram with pu󰀨er tank in series
LEGEND of Figure 4-3:
1 - Heat pump
2 - Filter
3 - Pressure safety valve
4 - Pressure meter gauge
6 - Pu󰀨er tank
10 - System lling water inlet
11 - Non-return valve
12 - Heating / cooling supply manifold
13 - Heating / cooling return manifold
17 - Integrative electrical resistance (optional)
18 - Expansion tank
40 - E/I = Summer / winter diverter (to be provided if the machine is both heating and cooling).
41 - TA = RT Room Temperature
 No settings need to be changed for operation with this diagram. Connect any additional Integrative electrical resistance
(17) with the interposition of a relay suitable for the electrical absorption of the installed resistance (see section 5.7.3).
The resistance must be connected to the “SH” and “N” terminals (Figure 5-10). The maximum applicable current is 2A.
 Items “2” to “18” must be eld supplied.
4 - FUNCTION OVERVIEW

14
FRYO PI COSMOGAS
4.2.3 - Connection with pu󰀨er tank in parallel
Figure 4-4 - Hydraulic diagram with pu󰀨er tank in parallel
LEGEND of Figure 4-4:
1 - Heat pump
2 - Filter
3 - Pressure safety valve
4 - Pressure meter gauge
5 - Pump
6 - Pu󰀨er tank
7 - “Tc” sensor
8 - “Th” sensor
10 - System lling water inlet
11 - Non-return valve
12 - Heating / cooling supply manifold
13 - Heating / cooling return manifold
17 - Integrative electrical resistance (optional)
18 - Expansion tank
40 - E/I = Summer / winter diverter (to be provided if the machine is both heating and cooling).
41 - TA = RT Room Temperature
 Items “2” to “18” must be eld supplied.
 The “Tc” (7) and “Th” (8) sensors are xed inside the appliance on the supply tube. To place them on the tank, remove
the cover and the frontal cover of the appliance, remove the two sensors and place them on the tank using the extension
cables supplied in the accessories bag (section 5.7.4).
 Connect any integrative electrical resistance (17) with the interposition of a relay suitable for the electrical absorption of
the installed resistance (section 5.7.3).
 Modify the operation of the internal pump, in this way the circulator will switch o󰀨 60 seconds after the compressor is
switched o󰀨: set Parameter “A1” to 0. (section 7.5).
4 - FUNCTION OVERVIEW

15 FRYO PI
COSMOGAS
4.2.4 - Connection with DHW production plus semi-rapid pu󰀨er tank plus solar (optional)
Figure 4-5 - Hydraulic diagram with DHW production plus semi-rapid pu󰀨er tank plus solar (optional)
LEGEND of Figure 4-5:
1 - Heat pump
2 - Filter
3 - Pressure safety valve
4 - Pressure meter gauge
5 - Water inlet
6 - Pu󰀨er tank
7 - Domestic hot water outlet
8 - Diverter valve
10 - System lling water inlet
11 - Non-return valve
12 - Heating / cooling supply manifold
13 - Heating / cooling return manifold
14 - “Tw” DHW temperature sensor
 Except for items "1" and "14", all items must be eld supplied.
The “Tw” sensor (14), supplied with the appliance, must be positioned on the tank using the extension cable connected
to the “Tw” terminal (Figure 5-10), present in the electrical connection compartment (Figure 3-1). Enable DHW operation
via the system settings: Parameter “08” = 2. (section 7.5).
 Connect any integrative electrical resistance (17) to a thermostat (15).
 Set the integrative electrical resistance point (17), using the Integrative electric resistance thermostat (15), at 5 ° C lower
than the domestic hot water set point.
4 - FUNCTION OVERVIEW
15 - Integrative electric resistance thermostat
17 - Integrative electrical resistance (optional)
18 - Expansion tank
19 - Solar control board
22 - Solar panel
40 - E/I = Summer / winter diverter (to be provided if the
machine is both heating and cooling).
41 - TA = RT Room Temperature

16
FRYO PI COSMOGAS
4.2.5 - Connection with DHW production (single coil tank loaded by plate heat
exchanger) plus solar (optional) plus direct connection to the system
Figure 4-6 - Hydraulic diagram with DHW production (single coil tank loaded by plate heat exchanger)
plus solar (optional) plus direct connection to the system
LEGEND of Figure 4-6:
1 - Heat pump
2 - Filter
3 - Pressure safety valve
4 - Pressure meter gauge
5 - Water inlet
6 - Coil tank
7 - Domestic hot water outlet
8 - Diverter valve
9 - Solar tank sensor
10 - System lling water inlet
11 - Non-return valve
12 - Heating / cooling supply manifold
13 - Heating / cooling return manifold
4 - FUNCTION OVERVIEW
14 - “Tw” DHW temperature sensor
15 - Electric resistance power supply
16 - Solar panel sensor
17 - Integrative electrical resistance (optional)
18 - Expansion tank
19 - Solar control board
20 - Solar pump
21 - Solar expansion tank
22 - Solar panel
23 - Pump
40 - E/I = Summer / winter diverter (to be provided if the
machine is both heating and cooling).
41 - TA = RT Room Temperature
 Except for items “1” and “14”, all items must be eld supplied.
The “Tw” sensor (14), supplied with the appliance, must be positioned on the tank using the extension cable connected
to the “Tw” terminal (Figure 5-10), present in the electrical connection compartment (Figure 3-1). Enable DHW operation
via the system settings: Parameter “08” = 2. (section 7.5).
 Connect any integrative electrical resistance (17) to a thermostat (15).
 Set the integrative electrical resistance point (17), using the integrative electric resistance thermostat (15), at 5 ° C lower
than the domestic hot water set point.
WARNING !!! If you use this scheme,
you must to provide a sanitization system
against the Legionella bacterium.

17 FRYO PI
COSMOGAS
5 - INSTALLATION
5.1 - Opening the package
The appliance is supplied in cardboard packaging. To open
it, follow the instructions on the closing aps of the packaging
itself.
5.2 - Dimensions
Figure 5-1 - Dimensions of model 6 kW
133
53
101
135
1053
1059 29
496
612
729
343
353
349
All dimensions are in millimeters.

18
FRYO PI COSMOGAS
Figure 5-2 - Dimensions of model 9 kW
5 - INSTALLATION
87,5
110
152
173
343
354,5
1053
1065 25
559
643
754
354
All dimensions are in millimeters.

19 FRYO PI
COSMOGAS
5 - INSTALLATION
Figure 5-3 - Dimensions of model 13 kW
290
91
176
810
1255 25
1047
1120
1171
1195
401
460
402
460
All dimensions are in millimeters.

20
FRYO PI COSMOGAS
Figure 5-5 - Minimum clearance distances for installation and future maintenance
400
500
1500
150
500
500
650
62403796.01.012
5.3 - Minimum clearance distances
WARNING !!! The appliance must only be installed
outside of the buildings in a well-ventilated place.
WARNING !!! It is forbidden to install the units one
above the other (Figure 5-4), to prevent the condensation
produced by the one positioned above from falling onto
the one below.
For installation and maintenance, it is necessary to leave free
spaces around the appliance as shown in the Figure 5-5.
5 - INSTALLATION
Figure 5-4 - Appliances uncorrect position
All dimensions are in millimeters.