5.6 Setting temperatures for standard operation mode 22
5.7 Setting temperatures for energy saving mode 23
5.8 Automatic Summer and Winter changeover 24
5.9 Heating circuits 24
5.10 Heat circuit settings 25
5.11 Heating / cooling curve 26
5.12 DHW / Anti-legionella mode 26
5.13 EVU –
5.14 Bivalent mode 28
5.15 Fan/Night mode 28
5.16 Freeze protection Geo 29
5.17 Freeze protection Air 29
6. Parameter table 30
7. Alarm management 59
heat management 27
8. Optional accessories
8.1 Room display 63
8.2 Dew point sensor 63
8.3 BMS – Internet module 64
9. Temperature probe resistant 65
10. Change the battery 66
3
1. Thank you for choosing to purchase a
GDH heat pumps are subjected to strict
and performance during the final
Our GDH engineers hope you enjoy our
Providing all installation and operation
instructions have been observed, GDH
onth warranty. User error,
improper installation, incorrect control
or vandalism are not covered by the
Manager is a
compliance with the European RoHS
conditioning and
refrigeration sectors and ensures absolute
Manager runs the control
program, and is fitted with the set of
devices (compressors, fans, …). The
electronic expansion valve guarantees best
o the room terminal for
monitoring and controlling the room
1.3 Power supply
Manager and terminal
to the other electrical devices (contactors
nd other electromechanical components)
inside the electrical panel. The internal
transformer ensures double insulation
cable type
distance
power
supply
telephone
30 m
150 mA
AWG24
cable
200 m
150 mA
GDH heat pump.
quality control tests in terms of functional
efficiency
inspection process.
products and the associated cost savings!
1.1 Warranty and guarantee
provides a 24-m
settings or damage caused by third parties
warranty.
1.2 Product description
This GDH-Heat-Pumpmicroprocessor-based electronic controller in
230 Vac version: The power supply to the
GDH-Heat-Pumpshould be separated from the power supply
a
between the instrument and the high voltage
power line.
1.4 User terminal connection
The maximum distance between the GDHHeat-Pump-Manager and the user terminal
is shown in the table below:
shielded
directives. It provides a solution for many
applications in the air-
versatility, allowing specific products to be
created on customer request. The GDHHeat-Pump-
terminals required for the connection to the
parameters are saved to Eeprom, ensuring
they are stored even in the event of power
failures (without requiring a backup battery).
The embedded driver for single-pole stepper
performance of the cooling circuit thanks to
PID superheat control. Finally, the GDHHeat-Pump-Manager offers the possibility of
connecting it t
temperature.
4
2. Controller
2.1 Controller board drawing
5
GEO
AIR
220 Volt Outputs
NO1
Compressor 1
Compressor 1
NO2
Ground source pump
-
NO3
Primary circuit pump
Primary circuit pump
NO4
DHW circuit pump
DHW circuit pump
NO5
Mix circuit pump
Mix circuit pump
NO6
External boiler / heater
External boiler / heater
NO7
Heating circuit pump
Heating circuit pump
NO8
DHW boiler/heater
DHW boiler / heater
NO9
General Alarm
General Alaram
NO10
4-way reversing valve
4-way reversing valve
NO11
Mix circuit pump 2
Mix circuit pump 2
NO12
Crankcase heater
Crankcase heater
24 Volt Inputs
ID1
Flow switch ground source side
-
ID2
Dew point sensor 1 – Heating
Dew point sensor 1 – Heating
ID3 - -
ID4
Dew point sensor 2
Dew point sensor 2
ID5
EVU / Heat management
EVU / Heat management
ID6
DHW storage heater overload
DHW storage heater overload
ID7
Integration boiler/ heater alarm
Integration boiler/ heater alarm
ID8
Remote on-off
Remote on-off
ID9
Dew point sensor 3
Dew point sensor 3
ID10
Primary circuit flow switch
Primary circuit flow switch
0-10 Volt Output
Y1 (0-10V)
Mix valve 1
Mix valve 1
Y2 (0-10V)
Cooling circulation pump
Cooling circulation pump
Y3 (0-10V)
Mix valve 2
Mix valve 2
Y4 (0-10V)
-
Fan
Temperature sensors
B1 (NTC)
Ground source circuit outlet temp.
Heat exchanger temperature
B2 (NTC)
Ground source circuit inlet temp.
-
B3 (NTC)
DHW control temp.
DHW control temp.
B4 (NTC)
Prim. system inlet temp.
Prim. system inlet temp.
B5 (NTC)
Mixing heating circle temp. 1
Mixing heating circle temp. 1
B6 (NTC)
Outside air temp.
Outside air temp.
B7 (NTC)
Primary system outlet temp.
Primary system outlet temp.
B8 (NTC)
Mixing heating circle temp. 2
Mixing heating circle temp. 2
B9 (NTC HT)
Comp. discarge gas temp.
Comp. discarge gas temp.
B10 (NTC)
Suction temperature
Suction temperature
B11 (0-5V)
High pressure transducer
High pressure transducer
B12 (0-5V)
Low pressure transducer
Low pressure transducer
!
2.2 Controller In & Outputs
Already connected by the factory
Recommend connection for installation
Additional connection for installation
6
NO3
1. pre-connected Primary circuit pump
Connect your main circulation pump from the heat pump to your
The DHW circulation pump or 3-way-valve loads the Domestic Hot
Connection for the circulation pump for heating mix circuit pump 1
An additional heater can be electric or a gas/oil boiler. The heater and
Circulation pump connection for the heating circuit pump.
Additional heater for the DHW - Domestic Hot Water Buffer tank.
When the heat pump has any alarm, this contact will be closed. You
Connection for the circulation pump for heating mix circuit pump 2.
2.3 Preconnected I/O
Outputs: NO 220 Volt (6 Ampere)
buffer tank. This pump is only working when the heat pump works.
NO 4 2. pre-connected DHW circuit pump / 3-way valve
Water tank when the heat pump switches to DHW mode.
NO 5 Mixing heating circuit pump 1
NO 6 3. pre-connected External boiler / heater
heat pump can work together or alone.
NO 7
NO 8 4. pre-connected DHW storage additional heater
NO 9 General alarm
NO 11 Mix circuit pump2
Heating circuit pump
can switch between close and open in the service settings.
7
2.4 Connection valves/pumps
No.
Function
1
Primary circuit pump
The most important digital outputs are pre-connected inside the heat pump.
2
3
4
5
DHW circuit pump / 3-way-valve
Additional boiler / heater
DHW heater
4-way-valve (Factory connected)
220V – 50 Hz – max. 6 A
8
ID2
Dew point heating circuit
Dew point sensor for the cooling mode of the heating cirucuit.
Dew point sensor 2 for the cooling mode of the Mixing heating circuit
Connection to the EVU device from your local energy supplier. Switch
Switch the heat pump on or off by an external controller / Home
Dew point sensor 3 for the cooling mode of the Mixing heating circuit
2.5 ID - Digital inputs (24 V)
ID4 Dew point mixing heating circuit 2
2.
ID5 EVU / Heat management
the heat pumps into the EVU mode. Please ask your local energy
supplier if you need this function.
ID8 Remote on-off
control system.
ID9 Dew point sensor 3
2.
9
Y1
Heating circuit 1 – Mix valve
Valve for the heating mix circuit 1
Connection for a cooling pump for the primary pump to the buffer
Valve for the heating mix circuit 1
B3
DHW control temp.
Domestic Hot Water tank temperature control.
Temperature for control the 3-way-valve of the heating circuit 1.
Connect to the north side of the building.
Connect to your buffer tank or back temperature (inlet).
Temperature for control the 3-way-valve of the heating circuit 2.
2.6 Y - Analog outputs
Y2 Cooling pump / valve
tank circuit.
Y3 Heating circuit 1 – Mix valve
2.7 B - Analog Inputs – temperature Sensors
B5 Mixing heating circle temp. 1
B6
B7 Primary system buffer tank / return temp.
B8 Mixing heating circle temp. 2
Outside air temp.
10
Sensor
Function
Menu
Standard
B3
DHW control. Temperature
Gfb02
NO
B4
Primary system inlet temperature
Gfb04
YES
B5
Mixing heating circle temp. 1
Gfb03
NO
B6
Outside Air temp.
Gfb03
YES
B7
Primary system outlet temp.
Gfb04
YES
B8
Mixing heating circle temp. 2
Gfb04
NO
2.8 Temperature sensors configuration
The heat pump manager needs different temperature sensors to manage the hydraulic functions.
You need to activate some sensors for different functions.
You can also set an offset for the sensor. In some cases the temperature must be calibrated, f.ex.
when the sensor cable will be extended.
Main sensors for the hydraulic functions are:
Controls the water tank for the DHW hot water
production. When the sensor detect the
temperature to heat up the water tank, the
controller will switch the 3-way-valve or the water
pump.
Controls the water tank temperature of the heating
buffer tank. In some applications without buffer
tank, the sensor can be placed at the back pipe to
the heat pump. When the sensor turns on the heat
pump, the controller switch on the primary
circulation pump.
Controls the position of the 3-way-valve for the
mixing circle. The sensor will be placed direct to
the circle.
The sensor needed for the defrost, temperature
compensation (heating curve), freeze protection
functions.
Measures the outlet system temperature. Used for
the freeze protection function.
Controls the position of the 3-way-valve for the
mixing circle. The sensor will be placed direct to
the circle.
11
3.0 Controller Display
Phone cable
30 m
CAT5 cable
200 m
3.2 Connection port
3.1 Display connection
Connect the display with the controller
board in your heat pump.
Connector J7 on the controller board.
Max. communication cable
Connection of display by RJ11 plug on the
backside of controller display.
The graphic display control all heat pump functions.
The display is shared in 4 areas.
Outd. T= Outdoor temp.
13
4.2 Menu structure
A. !On/Off
" "
B. Set point
" "
C. !Clock / Bands
"
D. Inputs/Outputs
"
E. Alarm log
"
F. Change board
" "
G. Service
" a. Change language
"
b. Information
"
"
c. Unit temp. control
"
"
d. Hour counter
" "
e. BMS config.
"
f. Service parameters
a. Hour counter!settings
" "
b. Probe calibration
" " c. Temperature control
" " d. User default/change PW1
g. Manual management
H. Manufacturer
"
"#!$%%&''!()&!*&+,-!&+(&.!/$''0#.1!
234!
14
4.3 Menu description
Used to set the set point for the
Antilegionella function and the heat pump
(standard and energy saving set point for
the selection screens relating to the heat
backup battery that stores the time.
A.
Unit On/Off
The unit status can be set from the main
menu (A.), based on the selection made.
On the first row the selection can be:
ON = standard conditions,
OFF = standby,
ENERGY SAVING = “reduced” set point for
greater energy saving,
AUTO = scheduler activated.
The second row (only editable if OFF is
selected on the first row), on the other hand,
is used to select the heat pump operating
mode (COOLING+DHW, HEATING+DHW,
DHW ONLY, HEATING ONLY, COOLING
ONLY, AUTO).
ON/OFF Unit
and date for all the associated functions. The
time, date, time bands, closing periods and
holidays are set from the Clock/Time bands
menu (C.). The screens are:
• Time and date setting
• Four daily time bands
• Closing periods, up to a max. of three
• Holidays/special dates, up to a max.
of six
Below are the screens for setting the “unit
only”:
The remote ON-OFF digital input can be
used to place the entire system in standby,
including domestic hot water control.
Note: standby can be set on screen A02
with the “enable temporary off” function,
used to start the unit again at a pre-set time
and date.
B.
Set point
“heating/cooling”, and for domestic hot water
production). The following figures only show
pump set point.
Thermoreg. Unit
C. Clock/Time bands
Description of operation: Heat pump manager is fitted with an internal clock with
Clock
To set less time bands than the four allowed,
simply leave the symbols “--:--“ in the field
“hh:mm”, doing the same for the set point.
On any day, four different time bands can be
set, with corresponding set point for each
band. After this each day of the week can be
selected, either copying the previous day#s
settings, or configuring them day-by-day. To
select the set point see the corresponding
paragraph and the parameters in the general
table of parameters.
For these types of units, system inertia is on
average quite long, as radiant systems very
often have large masses; in these cases, the
working set points (COMFORT and
ECONOMY) are set very close together.
Consequently, also the time bands are
normally reduced, because they consider the
significant inertia of the system.
15
alarms, access the log from the service
(if present), display the currently active
alarms and reset them (obviously these
nto two
protected is used to display and set the
G.a. Change language: select one of the
languages loaded in the application (Italian,
G.b. Info: view information relating to the
information concerning the GDH board
hours of the main moving devices
sors and pumps on the unit and
parameters required for connection to a
supervisory system; this thus depends on
CAREL protocol, and cards can be
Note: OFF status still guarantees unit
antifreeze protection.
Time bands can be created for one day
and then copied to other days if these are
the same.
D.
Inputs/Outputs
From the main menu (D.), both the type and
the physical status of the inputs and outputs,
digital and analogue, can be displayed in
sequence. If the input or output has not been
set (no device connected), “----“ will be
displayed. The related screens are shown
below.
G. Service
The service submenu is accessed from the
main menu (G.), and is divided i
parts, the first (a,b,c,d) not password-
following data:
English...).
application code (and corresponding version)
on the first screen, while the second shows
hardware.
Information
G.c. Unit temp. control:
Input/Output
E.
Alarm log
From the main menu (E.) the logged alarms
can be displayed in sequence; to reset the
menu with password. The “ALARM” button
on the other hand is used to mute the buzzer
remain in the log) and then access the log
directly.
Data logger
Note: the list of active alarms can be
accessed from the main page, by pressing
.
G.d. Operating hours: displays the operating
(compres
that depend on the type of configuration) that
may require periodical maintenance.
Working hours
Note: from this point on in the submenu,
access requires password entry (PW1 –
default 1234).
G.e. BMS configuration: used to set all the
the type of optional card that is fitted and the
type of protocol selected.
Choosing “CAREL”, connection can be made
over RS485 to a supervisor that supports the
connected that convert the CAREL protocol
to others, such as the TCP/IP card or the
16
operating hour threshold for the main
configuration) that require periodical
to be added to or subtracted from the
ing made by the probe in question.
Once the offset (Ofs) value has been
G.f.c. Temperature control: this branch
includes all the parameters relating to
temperature control and modifiable during
corresponding to the manufacturer area,
G.g. Manual management: used to switch
the individual actuators on the unit from
OFF, while for analogue outputs the
the defaults are Auto. This selection
bypasses control, but not the alarm
Trend card.
BMS config.
G.f.a. Hour counter settings: used to set the
devices on the unit (depending on the type of
maintenance.
The timer for each device can be reset on
the same screen.
Work. Hours. set
G.f.b. Probe calibration: used to set an offset
read
confirmed, pressing automatically updates
the reading of the corresponding probe (shown
on the side).
Probe adjust.
installation or service, except for those that
which are found under the H.c. branch.
G.f.d. User def./change PW1: used to reset
the alarm log and modify password PW1.
User default
automatic to manual.
For digital outputs, the status may be ON or
selection varies from 0-100%, obviously all
thresholds set, so as to ensure safety of the
unit. In general, this operation is used to test
the individual actuators during installation.
Manual mng.
Note: The respective probes can also be
enabled or disabled on these screens.
17
Heating / cooling / dhw / auto mode:
Anti-Legionella function:
DHW mode:
Bivalenz / Boiler:
Circulation pumps:
EVU-Mode:
Freeze Protection (Only for AIR /not
Fan-Night mode: (Only for AIR series)
5. Setup the GDH Heat pump manager
5.1 Functions
The heat pump is delivered out with standard factory settings. After installation, you can
switch it on for testing.
The standard factory settings are:
Mode: Heating
Temperature: Heating 55
o
C
The temperatures will be calculated by the
heating curve and the temperature setting.
When Auto mode is selected you can setup
different time programs.
Don´t use the cooling in winter for the
models that have the heat exchanger
outside.
In “DHW”-mode, only the Hot Water function
is enabled. Temperature setting is using by
the setpoint for DHW.
When Heating / Cooling with “DHW”
selected, the DHW has priority.
The primary circulation pump works only
when the heat pump compressor is on. You
have the possibility to set up the pump to
“always on”.
DHW-3-Way-Valve pump output can be
used also as a DHW circulation pump.
Additional Mixing circulations pumps are
working only when the circuit is activated
Heats up the water tank to a higher
temperature. The date is set by a scheduler.
This function avoids legionallas in the water
tank.
The controller can control up to two
additional heaters. One for the main circuit
for heating and the other one can be set into
the dhw tank. The activations depends on
the outside temperature. You can select if
the heat pump will be switchted off or run
together with the boiler.
Some electric companies switch off the
electricity for heat pumps in peak seasons
for 1-2 hours.
This function recognizes the cut off from the
compressor and optional you can select a
additional heater when the water
temperatures falls under the setpoint.
split): Protects the heat exchanger outside
in the heat pump against frost. The heat
pump switches automaticly on the circulation
pumps when the temperature at the heat
exchanger is under the selected set point.
You can select a time range when the fan
should be running slower.
Please note that the fan is only running max.
60%. You should not run it under 30%.
18
5.2 Setup
19
ON/OFF Unit A01
5.3 Select the heat pump working mode
GDH heat pumps can operate by a manual mode or by automatic mode selections.
The user must select the mode on his own requirements and efficiency aspects.
OFF Heat pump is in “STAND BY” mode
ON Heat pump works with “ON” temperature settings
AUTO Heat pump works with the “TIME SHEDULER”
ENERGY SAVE Heat pump works with “ENERGY SAVE” temperature settings
Heat pump unit
OFF
AUTO
Options for the working mode select
20
You can select only this menu, when the heat pump is “OFF”.
ON/OFF Unit A01
5.4 Select the heat pump operation mode.
!
AUTO Automatic change over between Summer and Winter mode
COOLING Only “COOLING” according “ON” temperatures
HEATING Only “HEATING” according “ON” temperatures
COOLING+DHW “COOLING” + “DHW” according “ON” temperatures
HEATING+DHW “HEATING” + “DHW” according “ON” temperatures
DHW ONLY “DHW” only according “ON” temperatures
Heat pump unit
OFF
AUTO
Options for the operations mode select
21
Autom. Unit Mode A02
5.5 Automatic Unit Mode
Summer and winter changeover. You can see this menu only when you select operation mode
“AUTO” in A01.
Mode in Summer
COOLING + DHW
Mode in Winter
HEATING + DHW
Mode in summer Mode in winter
22
Thermoreg. Unit B01
Heat pump temperature
Thermoreg. Unit B01
Mixcircuit 1
!
Thermoreg. Unit B01
Mix circuit 2
5.6 Setting temperatures for standard operation mode
You can select the main temperatures for all heat pumps operation modes under this menu.
Nominal setpoint (ON)
Cooling: 12.0 °C
Heating: 38.0 °C
Domestic: 50.0 °C
Select the temperature for the “ON” mode.
That is the standard temperature for the heat
pump.
Cooling: 12.0 °C
Heating: 38.0 °C!
Select the temperature for the “Mixcircuit 1”
circuit. This menu is only shown, when the
heating circuit is activated.
Cooling: 12.0 °C
Heating: 38.0 °C!
Select the temperature for the “Mixcircuit 2”
circuit. This menu is only shown, when the
heating circuit is activated.
!
!
!
!
!
!
!
!
!
23
Thermoreg. Unit B01
Heat pump temperature
Thermoreg. Unit B01
Mixcircuit 1
!!Thermoreg. Unit B01
Mixcircuit 2
5.7 Setting temperatures for energy saving operation mode
You can select the main temperatures for all heat pumps operation modes under this menu.
!
Energy save setpoint
Energy save setpoint
Cooling: 12.0 °C
Cooling: 12.0 °C
Heating: 38.0 °C!
Heating: 38.0 °C
Domestic: 50.0 °C
Select the temperature for the “Energy save
setpoint” mode. That is the standard
temperature for the heat pump.
Select the temperature for the “Mixcircuit 2”
circuit. This menu is only shown when the
heating circuit is activated.
Energy save setpoint
Cooling: 12.0 °C
Heating: 38.0 °C!
Select the temperature for the “Mixcircuit 1”
circuit. This menu is only shown, when the
heating circuit is activated.
!
!
!
!
24
Thermoreg. Unit GC02
Switch between Summer
5.8 Automatic Sommer and Winter changeover
You can set the criteria for the automatic change over when the heat pump
is in “AUTO” mode. Set the temperature and the differential when the heat pump manager start the
changeover.
You can change the min. measuretime for the temperature change over. For example when the
heat pump mangager measures 24h a temperature under the setpoint, the mode will be switched.
Please select the starting mode under “Actual selected mode”.
and Winter mode
Setpoint: 18.0 °C
Differential: 1.0 °C
Minimumtime: 24 h
Actual selected mode:
Wintermode
5.9 Heating circuits
You can configure up to three heating circuits.
The controller can manage:
! DHW pump or valve with own temperature set point and Anti Legionella function.
! Primary heating circuit with one circulation pump to load the buffer tank.
! Heating circuit with one circuit pump and temperature control over the primary heating circuit.
! Mix circuit 1+2 with 3-way-valve, temperature control.
25
Configuration GC03
Heatcircuit:
Configuration Gc06
Heatcircuit:
!
Configuration Gc07
Heatcircuit:
Configuration Gc05
Heatcircuit:
Configuration Gc04
Mixcircuit 1: enabled
5.10 Heat circuit settings
Type to calc. Setpoint
-Temperature external-
Select the type of regulation:
! Temperature external
Compensation of the heat pump temperature
regarding outdoor temperature. The heat
pumps temperature will be increase or
decrease.
! Roomdifference
Measures the temperature in a reference
room at increases or decreases the heat
pump temperature.
! fixed Setpoint
Uses the heat pump temperature without
compensation.
ext. Air cooling cal. SP
ext. Air min ! SP inc.
20.0°C 10.0 K
ext. Air max ! SP dec.
30.0°C 10.0 K
Cooling compensation
Select the external Air temperature range:
(Outdoor temperature)
For example:
20 °C the min. temperature in sommer and
30 °C the max. temperature in sommer.
The SP = Setpoint is the compensation.
The Setpoint will be increases when the
outdoor temperature going colder and
decreases when the outdoor temperature
goes up.
ext. Air Heating cal. SP
ext. Air min ! SP inc.
10.0°C 10.0 K
ext. Air max ! SP dec.
20.0°C 10.0 K
Heating compensation
Select the external Air temperature range:
(Outdoor temperature)
For example:
-20 °C the min. temperature in winter and
20 °C the max. temperature in sommer.
The SP = Setpoint is the compensation.
The Setpoint will be increases when the
outdoor temperature going colder and
decreases when the outdoor temperature
goes up.
Roomterminal by Bus
disabled
Select if the Heatcircuit using a Roomdisplay.
(optional)
Type to calc. Setpoint
-Temperature external-
Mixcircuit 2: enabled
Type to calc. Setpoint
-Temperature external-
Mixcircuit 1/2
When you want to use other circuits, please
repeat and enable the circuit.
26
5.11 Heating / cooling curve
The temperature can be calculated for compensation according outdoor temperature or with a
special room temperature display.
Regulation based on the water inlet temperature. You need to setup the inlet temperature sensor
direct into the buffer tank or the direct heating circuit.
5.12 DHW / Anti-legionella Mode
The application allows the domestic hot water temperature to be controlled by both activating a
three-way switching valve and a pump or the electric DHW heater. Domestic hot water is controlled
using probe B3 and the corresponding set points (Standard and Energy saving) are set on screens
B01 and B02.
Domestic hot water integration heaters:
The type of domestic hot water integration is set on screen Gfc03. In this case, the corresponding
digital output (NO8 set using the parameter on screen Gfc10) is activated and deactivated
according to one of the differentials compared to the working set point, as illustrated in the
following diagram:
27
Activation DHW electrical heater
Domestic hot water integration boiler:
In this case, the corresponding digital output NO8 (set using the parameter on screen Gfc03, which
can also be set to replace the heat pump) is activated and deactivated according to a set point and
differential defined on Gfc08.
Anti-legionella function:
A weekly algorithm can be activated (screen B03, if an integration system is enabled) that uses the
domestic hot water integration output to avoid problems relating to the proliferation of Legionella,
increasing the set point for a fixed time of 1h.
This function is also active when the unit is OFF.
5.13 EVU – heat management
The energy utility can switch off the energy in peak times or when you have special electricity
traffic. When the EVU disconnect the electricity, a special unit will send a signal to terminal ID5. (24
Volt)
In case that the electricity company cuts the energy you have several options when the function is
activated (Gfc62):
! none
Compressor and Fan are switched off, all other functions are working.
! DHW + System
The additional heater for DHW and the boiler/electrical heater will be switched on, when the
temperature don´t reach the setpoint.
! DHW integriert
Only DHW heater will be switched on, when temperature not reach the setpoint.
! System integriert
Only Boiler/electrical heater will be switched on, when temperature not reach the setpoint.
28
COP
0 °C7 °C
Temp-ext
Thermoreg. Gfc60
Fan night mode
5.14 Bivalent mode
Comparing cost effectiveness between heat pump and boiler
The boiler can be managed either as an integration system or as an alternative to the heat pump.
In the Manufacturer level, the efficiency of the heat pump is displayed on Ha08, while in the
Service level to activate the function select “Enable boiler” based on cost effectiveness (Gfc05). In
the same branch, the efficiency of the boiler and the cost of natural gas and electricity need to be
set (Gfc06 to Gfc07), the latter can be set based on different rates at different times.
Again on screen Gfc05, the outside temperature can be read, below which the boiler is enabled
based on the algorithm that is currently calculating the costs and efficiency of both systems (Heat
pump and Boiler).
The following graph describes the simplified trend in COP according to the outside temperature,
used in the cost comparison algorithms.
!
5.15 Fan/Night mode
Switches the fan to a specific time into a slower speed. Don´t select a speed lower than 30%.
Enabled: YES
Max Speed reduced to:
30.0%
Begin: 22:00
End: 5:00
29
Thermoreg. Gfc61
Freeze protection
5.16 Freeze protection (Geo)
This function is used to prevent potentially dangerous temperatures being reached for both the
system and the geothermal loops. The values are measured using the outlet temperature probes
(ground source and system primary circuit), setting an antifreeze set point and differential for the
individual circuits. These values can be set in the Service branch (Gfc12-13 and Gfc16-17).
Antifreeze alarms are serious alarms that shut down the heat pump, reset may be manual or
automatic as selected on the screens (see the table of alarms).
For the Air/Eco compact model the function can be set in Service branch (Gfc61).
You can select different circulation pumps. The circulation pumps will be switched on when the Set
Temperature is reached.
Request power: % Fan capacity request in manual 0 % 0 100 " I R/W
unit)
(scre
en
Start defrost cycle:
enabl
ed if
AW
unit)
Gg04
Enable manual
(scre
en
valve position:
enabl
ed if
exter
nal
EVO)
position: stp
valve position:
(scre
en
enabl
ed if
Manual valve
OnB
oard
position: stp
EVO)
activation
(AW units)
Start manual defrost cycle (AW
units)
Enable manual valve position 0 --- 0 1
Manual valve position 0 step 0 9999 " I R/W
Enable manual valve position 0 --- 0 1
Manual valve position 0 step 0 9999 " I R/W
0 --- 0 1
0 --- 0 1
0: AUT
1: MAN
0: NO
1: YES
0: NO
1: YES
0: NO
1: YES
D R/W
D R/W
D R/W
D R/W
59
7. Alarm Management
The alarms can be divided into three categories: serious unit alarms (these stop the unit or in any
case some of the main components of the unit), alarms that stop one or more functions of the
system, and other alarms (signal only or “warnings”) that do not stop any function, but rather warn
the user that certain thresholds have been exceeded, for example. Then there are alarms that are
not due to controller board faults.
The header of the Alarms table (paragraph 9.3) shows the alarm labels-codes: these are used to
identify the origin of the alarm indicated by GDH Heat pump manager.
To monitor active alarms simply press
more than one active alarm); to scroll the list, use the
To reset the alarms, display them and then press
and the display will show the name (or names, if there is
and buttons.
again. If the alarm condition no longer exists,
the alarm is reset, otherwise it will be shown again.
The following figure illustrates the screen displayed when pressing
: it shows 1) the position of
the alarm and 2) the part of the system/unit it relates to.
Note: with automatic reset, the system restarts operating in as, however the alarm LED and
the corresponding warning string remain active until
is pressed at least twice.
Alarm log
From the main menu, entering the dedicated branch (E.) or at the end of the list of alarms
described above, the following alarm log screen can be accessed.
60
Alarm
Yes
Automatic
60 sec
Yes
Automatic
60 sec
Yes
Automatic
60 sec
Yes
Automatic
60 sec
Yes
Automatic
60 sec
Yes
Automatic
60 sec
Yes
Automatic
60 sec
Yes
Automatic
60 sec
Yes
Automatic
60 sec
Yes
Automatic
60 sec
Yes
Automatic
60 sec
Yes
ALB02
High pressure compressor 1 from transducer
Manual
Immediate
Yes
Stop the unit
Run: 10s (config. Hc04)
Yes
Yes
comp. 2 available)
Yes
Yes
Yes
became manual
Yes
Yes
Start: 15s (config. Hc19)
Run: 5s (config. Hc20)
Yes
Manual
Immediate
Yes
Stop the unit
Yes
Can be enable
The information shown on the screen relates to:
1. the chronological number of the event (this indicates the moment when the alarm was
activated, that is, how “old” it is; E01 indicates the oldest alarm),
2. the time and date of the alarm,
3. the alarm code,
4. short description of the logged alarm,
5. the inlet and outlet temperature and pressure values.
Note: A maximum of 50 alarms can be logged, over this limit new events overwrite the older
ones, which are deleted.
Code
ALA01 Probe B1 faulty or disconnected Automatic 60 sec
ALA02 Probe B2 faulty or disconnected
ALA03 Probe B3 faulty or disconnected
ALA04 Probe B4 faulty or disconnected
ALA05 Probe B5 faulty or disconnected
ALA06 Probe B6 faulty or disconnected
ALA07 Probe B7 faulty or disconnected
ALA08 Probe B8 faulty or disconnected
ALA09 Probe B9 faulty or disconnected
ALA10 Probe B10 faulty or disconnected
ALA11 Probe B11 faulty or disconnected
ALA12 Probe B12 faulty or disconnected
ALB01 Position: ID3 high pressure Manual Immediate Yes Stop the unit
ALB03 Low compressor pressure from transducer Automatic (config. Hc05)
Note: the last letter of the alarm label-code (before the number) has the following meaning:
Note: alarm reset can be manual, automatic or selectable by parameter. In the first case, the
user has to reset the alarm manually. In the second case, the alarm is reset automatically by GDH
Heat pump manager which saves the event (these are less serious and potentially non-dangerous
alarms). The last case concerns reset selectable by parameter: if this option is active, the system
tries to reset the alarm five times (at a constant interval 10 seconds, saved in the alarm log), if after
five attempts the alarm condition persists, the manager switches to manual reset mode and the
alarm relay is activated. If, on the other hand, the alarm/fault situation is resolved within the five
consecutive attempts, the alarm relay is not activated and the event is recorded in the log.
Note: the alarm delays may be fixed, reset using the corresponding parameter (indicated in
brackets) or not present (“immediate” indicates there is no any delay between the moment when
the fault/problem is detected by HPM and when the alarm is signaled).
Note: the “alarm relay” column may specify “yes” if the relay is activated or “can be enabled” if
this can be enabled by parameter (on screen Gfc43).
Enabling the alarm relay by parameter implies the simultaneous activation of all the alarms marked
as “can be enabled” in the table of parameters shown above.
64
The display is direct connected to a heating circuit. You
8. Optional Accessories
8.1 Room display
can setup one display for the heating, mix 1 and mix2
circuit.
Main functions
! Displays the actual room temperature
! Increases/Decreases the room temperature
! Shows the actual mode cooling/heating
8.2 Dew point Sensor
In some conditions the pipes can be reach the dewpoint, when the heat pump is in
cooling mode. To prevent this situation, you can connect to every heating circuit a
dew point sensor to the digital input (24 V).!
!
67
65!
8.3 BMS – Internet module
GDH heat pump manager can be connected to various supervisory systems, using the
following BMS communication protocols: Carel and Modbus. A BMS serial port serial port is
used for the connection.
The various connection protocols are managed using the following optional cards:
• Carel RS485: code PCOS004850
• Modbus RS485: code PCOS004850
• Lon Works FTT10: code PCO10000F0 (*)
• BACnet RS485: code PCO1000BA0 (*)
• BACnet Ethernet: code PCO1000WB0 (*)
• Trend: code PCO100CLP0 (*)
Note: (*) these communication protocols are currently not manageable by the
configuration tools (LONset and BACset) available at http://ksa.carel.com/; the GDH heat
pump manager software is however already configured to use them.
The following figure shows the connection diagram of the BMS serial card to the controller.
Note: the addresses shown in the table correspond to the CAREL standard, while the
second shows the Modbus address (packet); if using the Modbus communication protocol in
“register” mode, the addresses shown in the table (Modbus column) must be increased by
one unit, both for the digital variables (coils) and the analogue variables (registers).
67
Table of temperature-resistance values for
NTC sensor 10K@25°C
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