NESTOR
NESTOR
The brain of the complete climate management system
GENERAL
MAIN OBJECTIVES
NESTOR is the new groundbreaking access point for a
complete Swegon climate management system.
○○ Single point of access to all climate products
NESTOR connects intelligent Swegon products in the
building to one single point.
○○ No internal climate demarcation lines
NESTOR uses the full intelligence of all connected products, creates common alarm lists, sets heating and cooling
priority and helps to continuously optimise heating and
cooling temperatures and air volumes for up to 8 subsystems in the building.
NESTOR can also be used for a virtual internal network of
up to eight buildings to centrally control ventilation and
indoor climate.
○○ Connects up to 8 GOLD to 1 Swegon Chiller/Heat pump
○○ Simplicity and clarity
○○ Total overview
○○ Easy and fast design and installation
○○ Cost effective
○○ One supplier for hardware and software
○○ Common alarm handling
○○ Time channels/Year time channels
NESTOR
Content
Terminology......................................................... 3
General information............................................ 4
Storage of documentation/project information............ 4
Technical data.............................................................. 4
Interfaces..................................................................... 4
System types........................................................ 5
GOLD only................................................................... 5
Super WISE only.......................................................... 5
GOLD and Super WISE................................................. 5
Swegon Chiller/Heat pump and GOLD......................... 5
Swegon Chiller/Heat pump, GOLD and Super WISE..... 5
AQUA Link and GOLD.................................................. 5
AQUA Link, GOLD and Super WISE.............................. 5
External heating and external cooling........................... 5
System examples................................................. 6
System limitations............................................... 8
System requirements........................................... 8
Functions.............................................................. 9
Alarms......................................................................... 9
Location ID examples................................................. 10
Alarm notifications......................................................11
Common Outdoor Temperature................................. 12
System operating mode............................................. 12
Time channel controlled output................................. 13
Cooling and Heating.................................................. 13
Installation......................................................... 16
System configuration................................................. 16
System access – Communication.................................17
User interface..................................................... 18
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NESTOR
Terminology
CMS
Climate Management System
AHU
Air Handling Unit
FIFO
First In First Out
BMS
Building Management System
Digital
output
An output, which is high or low i.e. closed
or open circuit. It can also be referred to as
an independent contact. Digital indicates
that it should be treated as 1 or 0.
ERS
Extract air temperature Related
Supply air temperature control
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NESTOR
General information
NESTOR is a product that connects GOLD air handling
units with a Swegon Chiller/Heat pump. It also provides
a “single point of access” to a system made up of several
(different) Swegon climate control products.
Technical data
Supply voltage
230 V AC, max. 10 A
CE-approved to
EN 61000-6-2, EN 61000-6-3
NESTOR can be configured to set the system in “occupancy
mode” at a certain time or at a given signal. The user
selects which functions to activate in GOLD and on the
Swegon Chiller/Heat pump while in occupancy mode.
Enclosure class
IP 65
Ambient temperature
at relative humidity
-20 – +40°C
10 – 95%
The three main objectives when using NESTOR are:
Dimensions (W x H x D)
300 x 400 x 120 mm
Weight
8000 g
• Control of a Swegon Chiller/Heat pump based on the
cooling and heating demands from up to 8 GOLD units
and external demands
• A single point of access to the Swegon system
• Provides a web interface where the user can observe all
active alarms in the system
Interfaces
Storage of documentation/project
information
NESTOR can be obtained with an SD-card (accessory) for
central storage of documentation and relevant project
information.
Operational log data from underlying products, such as
Super WISE and GOLD, will not be transferred to NESTOR.
These products can also be equipped with an SD-card (as
accessory), for logging operational data.
Figure 1: I/Os on the NESTOR hardware. Note the controller has additional I/Os
which are not used.
I/O
Type
Description
DI 1
Digital input for independent contact
Used for Operation Mode
DI 2
Digital input for independent contact
External heating demand
DI 3
Digital input for independent contact
External cooling demand
DI 6
Digital input for independent contact
Total factory setting
DO 1
Digital output (independent contact)
External heating
DO 2
Digital output (independent contact)
External cooling
DO 3
Digital output (independent contact)
Time channel controlled output
DO 4
Digital output (independent contact)
Alarm notification
DO 5
Digital output (independent contact)
Current water type (hot/cold)
Table 1: Summary of all electrical inputs and outputs.
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NESTOR
System types
Swegon Chiller/Heat pump, GOLD
and Super WISE
Any combination of the following products can be
connected to NESTOR:
•
•
•
•
•
1-8 GOLD unit (TCP/IP)
1–8 Super WISE (TCP/IP)
1 Swegon Chiller/Heat pump (Modbus EIA485)
AQUA Link (Modbus EIA485)
External heating and/or cooling source can also be
connected through digital outputs 1 and 2 to be
controlled on/off.
In this type of system, all features available for GOLD and
Super WISE systems and Swegon Chiller/Heat pump and
GOLD systems can be used.
AQUA Link and GOLD
GOLD only
When a GOLD unit is connected, NESTOR collects all GOLD
alarms. Time channels can be set in NESTOR to control
operation modes and a common outdoor temperature
sensor can be used for all GOLD units.
All GOLD web pages can be accessed from the NESTOR
web interface.
An AQUA Link can be used in combination with a standard Swegon Chiller. The function is similar to when using
GOLD to one AQUA Link (see GOLD Function Guide
SMART Link/AQUA Link for more information), but in this
case NESTOR manages the AQUA Link circulation pump
and alarm.
The AQUA Link provides any GOLD Supply Air cooling
coils and one AYC cooling with cold water at an optimised
temperature.
AQUA Link, GOLD and Super WISE
Super WISE only
In this type of system, all features available for GOLD and
Super WISE systems and AQUA Link and GOLD systems
are possible to use.
When a Super WISE is connected, NESTOR collects all
alarms from Super WISE and its underlying zone and
room products.
External heating and external cooling
All GOLD web pages can be accessed from the NESTOR
web interface.
Primary source
GOLD and Super WISE
All features available when using GOLD only or Super
WISE only are available in this system. Any Super WISE unit
selected as connected to a particular GOLD unit (configured
via the NESTOR web interface) is displayed as wired to that
GOLD on the NESTOR system overview web page.
Swegon Chiller/Heat pump and GOLD
In this type of system all GOLD only features are available.
Some basic parameters from the Swegon Chiller/Heat
pump controller are displayed via the NESTOR web interface and any Chiller/Heat pump alarm is shown as one of
three alarms in the alarm list.
Furthermore, it is possible to let the Chiller/Heat pump
feed any GOLD heating and/or cooling coils with hot and/
or cold water. NESTOR registers the heating and/or cooling demand from each GOLD unit, or when there is an
external demand, and controls the Swegon Chiller/Heat
pump depending on the demand. If there is a simultaneous cooling and heating demand (and the Chiller/Heat
pump is reversible), NESTOR includes a priority function
which determines whether to provide cooling or heating.
External heating, e.g. district heating, can be used as the
primary heating source, instead of Swegon heating. The
source is controlled with an on/off signal by digital output
1, and is activated as soon as there is a heating demand in
any GOLD unit or when there is an external demand.
In the same way, an external cooling source can be used
when no Swegon cooling is used.
Backup source
External heating, e.g. district heating, can be used as
backup heating when the Swegon Chiller/Heat pump for
some reason fails to provide hot water. The source feeds
either a second heating coil or a three way valve which
is also fed by the Swegon Chiller/Heat pump. The valve
is controlled by the digital output 1, to switch between
Swegon heating and external heating.
In the same way, an external cooling source can be used
for backup.
All Swegon Chillers/Heat pumps, in GOLD Function Guide
SMART Link/AQUA Link, that are possible to combine in a
GOLD-Chiller/Heat pump one to one system are also possible to connect to NESTOR.
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NESTOR
System examples
Figure 2:
A system with AQUA Link can only include one AYC Cool system. AYC for cooling is associated with AQUA Link
AYC for heating is separate. AYC always communicates directly with GOLD
Figure 3:
A system with GOLD and Super WISE can include up to 8 subsystems with or without Super WISE and AYC.
AYC for cooling & heating is connected to each GOLD.
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NESTOR
System examples
Figure 4:
A system with a Chiller and an external heat source can be supplied with heating and cooling simultaneously.
NESTOR issues start and stop signals to the external heat source through an independent contact.
User
NESTOR
LAN
Figure 5:
A building owner with a virtual internal network between multiple buildings can use NESTOR to connect up to 8 buildings to the same NESTOR. In this case, control of cooling and heating production is handled locally by GOLD and AYC.
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NESTOR
System limitations
• Only Swegon Chiller/Heat pumps of a type possible to
connect directly to a GOLD unit, according to GOLD
Function Guide SMART Link/AQUA Link, are possible to
use in a NESTOR system
• AQUA Link can be used if there is one, and only one,
AYC cooling in the system
• It is not possible to use CoolDX in a GOLD unit system
connected to NESTOR
• Optimisation of the water temperature is not available
for cooling and heating coils connected to one GOLD
unit using Extract Air control (ERS 2 may be a good
substitute to the EA control). Applicable to the GOLD,
Version D only
• Hybrid systems are controlled on/off only
System requirements
• NESTOR, all GOLD units and all Super WISE units must
be connected to the same TCP/IP network
• Software version 6.09 or later is required for all Version
D GOLD units connected to NESTOR
• Software version 1.10 or later is required for all Version
E GOLD units connected to NESTOR
• Software version 1.14 or later is required for all Super
WISE units connected to NESTOR
• There must be at least one GOLD unit that measures a
valid outdoor temperature when a Swegon Heat pump
or Reversible heat pump is used
• When a (clean) heating coil is supplied by a reversible
system, the digital output 5 must be used to control a
switch valve that protects the heating coil from receiving
cold water
• When a (clean) cooling coil is supplied by a reversible
system, the digital output 5 must be used to control a
switch valve that protects the cooling coil from receiving
hot water
• The digital output 1 must be used to control a switch
valve switching between Swegon Heat pump and External heating if they both supply the same heating coil
• The digital output 2 must be used to control a switch
valve switching between Swegon Chiller and External
cooling if they both supply the same cooling coil
• When a common outdoor temperature is used, the external sensor must be attached to the GOLD unit selected as
the source unit. Sensor 1 must be used for the Version E
GOLD units whereas sensors 2 – 4 are optional
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NESTOR
Functions
Alarms
NESTOR collects all system alarms, both active and recovered, and displays the 200 most recent on the Alarm list
page. If there are more than 200 alarms in the system,
recovered alarms will be deleted from the Alarm list page.
An example of the alarm list is shown in figure 6. Active
alarms are shown in red and the date and time of appearance and recovery are displayed. The type of unit, the local
alarm number and the alarm priority (A or B, A is the highest
priority) are also displayed. A classification is displayed for
each unit type, which is used to configure the type of alarms
that should generate e-mail or digital output notifications.
The priority and classification of each unit type is explained
in Table 2.
A location ID is also displayed for each alarm, this is used
to indicate which connected unit is generating the alarm.
Single numbers (1-8) indicate a System level product,
which can be a GOLD unit, a Super WISE or a Swegon
Chiller/Heat pump.
Device
Classification
NESTOR
System products
A
Swegon Chiller/Heat
pump
Cooling/Heating
production
A
GOLD unit
Air production
Super WISE
Climate supply
A
Zone controllers
Climate supply
A(/B)
Room controllers
Climate supply
B
Room slave controllers
Climate supply
B
Alarm no
The user can add a comment to each alarm post.
According to The priority of
GOLD settings each alarm is
read from GOLD.
The priority is
default A, but
this is possible to
change to B.
Name
Description/Trigger
1
No outdoor temperature
No system outdoor temperature
available.
2
Swegon heat limitation
The heating is limited due to low
outdoor temperature OR low supply
water temperature.
3
No communication to
IQnomic Plus module no. 5
AQUA Link IQnomic Plus module 5
does not respond on request
4
AQUA Link circ. pump
alarm (cooling)
AQUA Link circulation pump alarm
(cooling)
5
AQUA Link circ. pump
alarm (heating)
AQUA Link circulation pump alarm
(heating)
10
No Chiller/Heat pump
comm.
Communication lost to Swegon
Chiller/Heat pump
11-18
No comm. to GOLD x
Communication lost to GOLD unit x.
21-28
No comm. to Super
WISE x
Communication lost to Super WISE x.
Room controllers are shown with four numbers as A-B-C-D
where A, B and C indicate the same as for a zone controller
and D is the room number.
Some examples are listed in the section Alarms web page.
Comment
Table 2: Classification and alarm priority for each product possible to connect to
a NESTOR CMS system.
Zone controllers are shown with three numbers as A-B-C
where A is the number of the Super WISE it is connected
to, B is the zone number and C is the duct/damper
number in that zone.
Room slave controllers are shown with five numbers as
A-B-C-D-E where A, B, C and D indicate the same as for a
room controller and E is the slave number.
Priority
Table 3: NESTOR alarms.
The alarm list can be sorted on any of the above mentioned data e.g. by location ID or by Priority. There is a
possibility to hide all recovered alarms and to reset the
alarm buffer. Note that a reset will not remove the alarm
in the unit it is associated to. Hence, if an alarm is active
when a reset is made it will reappear in the list.
For more information about the alarms generated by a
product in the NESTOR system, see the user documentation for the specific product.
Alarms generated by NESTOR are shown in Table 3.
Alarms - Super WISE
Alarms - Chiller/Heat pump
Each Super WISE can generate up to three alarms. Super
WISE local alarms are classified as Climate supply alarms
with priority A.
A Swegon Chiller generates three alarms. These are summary
alarms on three levels. All of these are classified as a Cooling/
Heating production alarm with priority A.
Alarms - GOLD
The Version E GOLD unit generates up to 100 groups with
up to 15 alarms in each group, whereas a Version D GOLD
unit can generate up to 200 alarms classified as alarms for
Air production.
A Super WISE can manage a system with a total of 10
zones with a maximum of 60 rooms each.
The Super WISE stores up to 100 zone and room controller
alarms in a FIFO buffer, which are collected by NESTOR.
Each alarm is prioritised as an A or B alarm, but they can
also be individually deactivated.
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NESTOR
Functions
Figure 6: Example of an alarm list sorted by date. This is the default setting to sort the list when the alarm list is opened.
Location ID examples
Example 1: location ID 2-3-2-05-2 indicates (from right
to left) the 2nd room controller slave in the 5th room,
connected to the 2nd damper in the 3rd zone of Super
WISE number 2.
Example 2: location ID 2-3-2-05 indicates (from right to
left) the room controller in the 5th room connected to the
2nd damper in the 3rd zone of Super WISES number 2.
Example 3: location ID 3-5-2 indicates (from right to left)
zone damper number 2 in the 5th zone of Super WISE 3.
Example 4: location ID 3 indicates GOLD OR Super WISE
unit number 3. The device type is required in order to
determine which one the location ID is associated to. In
this case Super WISE.
Example 5: location ID “–” indicates the Swegon Chiller
or NESTOR.
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NESTOR
Functions
Figure 7: Example of the web page where the alarm configuration that sets a digital output is selected. The Class fields are static, but the Priority field can be used to
select one of A, A&B or None.
Alarm notifications
It is possible to send e-mail notifications for a selected
alarm class and priority.
An example of how to configure which alarm classifications and priorities set digital output 4 is shown in the
Alarm notification figure above.
The output will be activated if an alarm with A priority is
active for any class except Climate Supply, or if an alarm
with B priority is active for a system product or a Heating/
Cooling product.
An e-mail server can be configured from which alarm
notifications are sent on the Configuration/E-mail settings
page.
The type of alarms that generate an e-mail to a user are
configured in the same way as setting the digital output
(see the figure above). These settings are found on the
Configuration/User page when selecting “Edit->Alarm
notifications” for each user. The field to add an e-mail
address for the user is also found here.
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NESTOR
Functions
Common Outdoor Temperature
The user can choose to use a common outdoor temperature for all connected GOLD units. This is selected on the
Functions/Temperature control page. Entering 0 means
no common temperature is used. Entering 1, 2 ... 7 or 8
means that the GOLD number selected is the source and the
temperature is communicated to the other GOLD units. The
external temperature sensor must be connected to the GOLD
unit selected as the source. Sensor 1 must be used for the
Version E GOLD units whereas sensors 2 – 4 are optional.
There are also 8 separate Year channels to set the system
in occupancy mode. Occupancy mode is only activated
once at the given date and time by selecting a start date
and time and an end day and time. The Year channels
override Week channels. It is possible to select one of the
options in table 5, for each of the Year channels.
The options associated to Occupancy mode e.g. “High
speed, No cooling” mean that if the year channel is active, all
GOLD units will run at High speed mode and cooling is not
possible. There is one option for each of the 8 year channels.
There is a setting for each GOLD unit that indicates whether
or not the unit should obtain and use the common outdoor
air temperature. If not, the GOLD unit will use its own temperature setting according to a standard routine.
For each connected GOLD unit, the System operation
mode can be set as “Applied” or “Not applied”. A GOLD
for which the operation mode is applied will receive the
NESTOR operation mode.
If for some reason the external temperature sensor on the
source GOLD unit is not available (sensor error or sensor missing) the first found available, reliable and valid internal GOLD
sensor for outdoor temperature is used as the source until the
selected sensor is available again. A sensor is available when
no alarms are active. The sensor is reliable when the GOLD
unit is NOT stopped, and there is a setting for each GOLD
unit that indicates whether or not the sensor is valid.
The operation modes are prioritised increasingly as
“Low speed, High speed, Stop” (Stop has the highest priority). This means that if a particular GOLD unit has
individual time channels which currently set it in High speed
mode and NESTOR sets Low speed, it will run at high speed.
If NESTOR then changes to Stop, the GOLD unit will stop.
Time channels
Option (no occupancy-occupancy) Action
The common outdoor temperature is displayed in the
bottom left corner of the status field on the NESTOR
web page. If no common temperature is used, it is still
displayed as the one used for the cooling and heating
function. The first found reliable internal sensor on all
connected GOLD units is then used.
Swegon Chillers/Heat pumps use their own integrated
outdoor temperature sensor.
System operating mode
The system operation mode is used to set the NESTOR
system in different modes at specified time channels and/
or at a given input signal. It changes the airflow settings
on the GOLD units (auto, low speed or high speed) and
can turn off comfort cooling (no cooling demand activates the chiller). The two available modes are No occupancy and Occupancy. The default mode is No occupancy.
It is possible to set the system in the Occupancy mode
either from digital input 1 (DI 1) or from a time channel.
In order to be able to use the NESTOR Time and
Year channels the controlled GOLD units must be
set in Auto mode using the hand terminals. Any
GOLD unit set to Low speed/High speed or STOP
using the hand terminal will not be affected by the
NESTOR operation mode.
Auto-Auto
Each GOLD works according to individual
time channel settings.
Auto, No cooling – Auto
The chiller is not allowed to produce
cooling in No occupancy mode. Using this
setting and no time channels results in cooling never being activated.
Auto-Low speed
In No occupancy mode, each GOLD works
according to individual time channel settings.
In Occupancy mode, they run at low speed.
Auto, No cooling – Low speed
Same as above but the chiller is not allowed
to produce cooling in No occupancy mode.
Auto-High speed
In No occupancy mode, each GOLD works
according to individual time channel settings.
In Occupancy mode, they run at high speed.
Auto, No cooling – High speed
Same as option 5, but the chiller is not allowed
to produce cooling in No occupancy mode
Low speed - High speed
In No occupancy mode, GOLD unit runs at
low speed. In Occupancy mode, they run at
high speed
Low speed, No cooling - High
speed
Same as option 7, but the chiller is not allowed
to produce cooling in No occupancy mode.
Table 4: Alternative actions when weekly based time channels are used.
Year time channels
Option
Action
Time channel off
The time channel is inactive
Stop
Each GOLD and the chiller is stopped
There are 8 separate time channels to set the system in
Occupancy mode. Occupancy mode will repeat at the
given time each week by selecting one or more weekdays.
This is similar to the method currently used on GOLD units.
Auto
Each GOLD is set to Auto and works according to
individual time channel settings.
Auto, No Cooling
As option 3, but the Swegon Chiller is not allowed
to produce cooling.
Low speed
Each GOLD is set to Low speed.
It is possible to configure operation mode actions for the
time channels according to any of the options in Table 4.
Low speed, No Cooling
As option 5, but the Swegon Chiller is not allowed
to produce cooling.
High speed
Each GOLD is set to High speed.
High speed, No Cooling
As option 7, and the Swegon Chiller is not allowed
to produce cool.
The options associated to “No occupancy - Occupancy”
e.g. “Auto, No cooling - Low Speed” mean that the GOLD
units will run in Auto mode and cooling is prevented in
No occupancy mode while Low speed is used in Occupancy mode. The set option is valid for all week based
time channels and digital input 1.
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Table 5: Alternative actions when year time channels are used.
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NESTOR
Functions
Time channel controlled output
Cooling and heating demands
Digital output 3 is set according to the time channels in a
similar manner to the way operation mode is configured.
3 weekly based time channels and 3 time channels set the
output once (each).
NESTOR monitors the local demand for each used heating
coil in each GOLD unit. These are combined into a system
heating demand which will be true if any of the local
heating demands are true.
If the actual time and date is within any of the 6 channels,
digital output 3 will be set.
The system cooling demand is determined in the same way.
Cooling and Heating
If a Swegon Chiller/Heat pump is connected to the system,
the type (chiller, heat pump or reversible) is selected on
the Configuration/System product connection page.
It is also possible to use external heating and/or cooling
as the primary or backup source, which is selected from
the Configuration/System product connection page.
Selecting external heating will automatically set it as the
backup heating source if the Swegon Chiller/Heat pump
type is Heat pump or Reversible. Otherwise it is used as
the primary (and only) heating source. The same principle
applies for external cooling, but it is used as the backup
source when the Swegon Chiller/Heat pump type is
Chiller or Reversible.
For a Swegon Chiller/Heat pump, NESTOR controls the
water temperature by calculating and transmitting a
system heating and system cooling set point. For external
sources, NESTOR only controls these on/off.
Any heating and/or cooling coil, controlled by a heating
and/or cooling sequence in table 6, can be fed by a NESTOR
controlled heating and/or cooling source. Using up to 8
GOLD and 9 sequences results in a NESTOR cooling and
heating source feeding up to 72 cooling and heating coils.
Cooling/Heating
Sequence
Abbreviation
Controlled temperature
Type
Ordinary heating
OH
Supply air
Heating
Extra heating
EH
Supply air
Heating
Xzone heating
XH
Xzone supply air
Heating
All Year Comfort
Heating
AYCH or AH
AYC heating water temperature (to or from radiators or
heating coils/beams)
Heating
Preheating
PH
Outdoor air (to AHU)
Heating
Ordinary cooling
OC
Supply air
Cooling
Extra cooling
EC
Supply air
Cooling
Xzone cooling
XC
Xzone supply air
Cooling
All Year Comfort
Cooling
AYCC or AC
AYC cooling water temperature (to or from chilled beams)
Cooling
One heating and one cooling set point are configured for
each GOLD unit.
The system heating set point value is the highest heating set
point value set on all GOLD units with a heating demand.
The system cooling set point value is the lowest cooling set
point value set on all GOLD units with a cooling demand.
If Extract air control is used, optimisation cannot be
used (GOLD ver. D). If optimisation is activated (individual
configuration for each GOLD unit), NESTOR optimises the
cooling and heating set points for that GOLD unit with
respect to its demands. The cooling and heating set point
values are then used to set the correct set point values on
the Swegon Chiller/Heat pump.
The figure on the next page shows an example of how
the cooling demand and set point value is determined
when two GOLD units are used.
External heating and cooling demand
External demands are indicated by closure of the DI 2 (heating) and DI 3 (cooling) inputs. The function is activated and
is possible to invert. Fixed temperature set points are used
for both an external heating demand and an external cooling demand. When there are no other demands (no heating
or cooling demands from GOLD units) the system uses the
preset set points set for the external demands.
It is possible to choose between two operating modes:
Economy and Comfort.
Table 6: Heating and cooling coil control
An AQUA Link can be used only when a Swegon Chiller
is used. Activation and the type of alarm signal are set on
the Functions/Temperature control page.
If more than one GOLD unit is used in a NESTOR
system with an AQUA Link, only one of the units
can use AYC cooling.
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NESTOR
Functions
Swegon Cooling
If a Swegon Chiller is used, NESTOR sends the chiller the
system cooling demand and the system cooling set point
value. An example is shown in the figure below.
If there is an active alarm from the Swegon Chiller, external
cooling is used if available.
Swegon Heating
If a Swegon Heat pump is used, NESTOR sends the heat
pump the system heating demand and the system heating
set point value.
If there is an active alarm from the Swegon Heat pump,
external heating is used if available.
Protection is also provided against a too low outdoor
temperature or a too low supply flow temperature. This is
referred to as Heat limitation. For further information, see
the section Heat limitation.
Reversible Chiller
If a Swegon Chiller of type reversible is used, NESTOR
activates the chiller if any of the system heating or cooling
demands are true and supplies it with the system heating
and cooling set point values. The chiller is also set to produce heating (heating mode) OR cooling (cooling mode).
If there is a system heating demand, but not a cooling
demand, the chiller mode is heating and vice versa.
When a cooling and heating demand occurs at the same
time, the chiller mode is cooling if the outdoor temperature
is higher than the configured value. Otherwise heating is
activated.
There is a limitation as to how often the chiller is able to
switch between cooling and heating. This is configured
in days and hours on the Temperature control web page.
The mode is not possible to switch until at least this
number of days and hours has elapsed.
There is a prioritised mode (heating or cooling) which can be
selected to prevent the Swegon Chiller from “getting stuck”
in an undesired mode. If the mode is cooling and there is
a system heating demand and the priority is heating, the
Chiller/Heat pump is forced to produce heat if the time since
the last switching operation is more than the time configured for prioritised switching. This time should be set much
lower than the ordinary minimum time between switching.
To force the Swegon Chiller/Heat pump to switch (e.g.
during service), set the minimum switch time (hours, days)
to zero and then back to normal again. This forces switching from cooling to heating or vice versa if the current
demand is different from that being produced at the time.
When a reversible Chiller feeds combi coils controlled by
Extra regulation sequence, there is built-in temperature
protection in the GOLD units which protects against heating with cold water or vice versa. When feeding any other
coil, using any other sequence in TABLE 6, an external
protection is required. It is then highly recommended to
place a two way valve before the coil. The valve is controlled with an on/off signal by digital output 5 (DO 5)
which switches high/low according to the production of
heated/chilled water. The output is possible to reverse.
If there is an active alarm from the Swegon reversible
Chiller, external heating or cooling is used if available.
Figure 8: An example of 2 GOLD units with a cooling demand. Fig. A shows the cooling set point values for two GOLD units and Fig. C shows the system's cooling set
point. Fig. B shows the cooling demand signal for two GOLD units and Fig. D shows the signal for system cooling demands. Note that the activation delay here is zero.
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Functions
Swegon Chiller/Heat pump heat limitation
If the Swegon Chiller/Heat pump type is heat pump or
reversible, there is a protection function for heating production when the outdoor temperature is too low or the
supply water temperature is too low.
The user can activate this function and choose between the
two detection types on the Temperature control web page.
If the outdoor temperature option is used, Heat limitation mode is entered when the outdoor temperature falls
below a configured limit value. Recovery from Heat limitation occurs when the outdoor temperature is more than 3
Kelvin higher than the limit value.
If the supply water temperature option is used, Heat
limitation mode is entered when heating is active and
the supply water temperature drops below a difference
from the current heating set point value for more than
a specified amount of time. The temperature difference
is configured on the Temperature control web page.
Note that one of the two values must be set high during
system start up to avoid an undesired heat limitation i.e.
when the supply water temperature for obvious reasons is
much lower than the set point value.
Recovery from heat limitation mode occurs when heating
is active and the supply water temperature is higher than
the system heating set point value. It can also recover if
heating is not active and the outdoor temperature has
increased by 3 Kelvin since entering heat limitation mode.
The action taken during heat limitation is selected on the
Temperature control web page. If None is selected, the
Swegon Chiller/Heat pump is turned off (no heating will be
produced). The option “Change” activates external heating source (if enabled) and turns off the Chiller/Heat pump.
The option “Both”, activates external heating source and
the Swegon Chiller/Heat pump remains enabled.
Hybrid System
A hybrid system can produce heating and cooling at the
same time. The water temperature is not controlled and
NESTOR acts exactly as if Swegon Chiller/Heat pump type
is “None” and both external heating and cooling is used.
External heating
If external heat is used, the digital output 1 is set whenever there is a system heating demand, and at least one
of the following is true:
1.Swegon Chiller/Heat pump type is set to None or Cool
2.There is one active Chiller/Heat pump alarm or one
active AQUA Link alarm
3.The Swegon Chiller/Heat pump type is Reversible and is
running in cooling mode, or has been stopped due to
time limit before switching to heating mode
4.The Heat limitation is active, and Heat limit action is
“Change” or “Both”
When the Swegon Chiller/Heat pump type is Hybrid
system, the digital output 1 is set as soon as there is a
heating demand.
If external heating is used as backup, there are two variants of connection to the heating coils. For the supply
air heating, the Swegon Heat pump/Swegon Reversible
machine feeds one of the sequences (Ordinary heating
and Extra heating) and the external (backup) heating
source feeds the other one.
For radiators and Xzone there is only one sequence each
(AYC heating and Xzone heating). A three way valve must
be used, connected to the Swegon Heat pump/Reversible
machine (1), the external heating source (2) and the heating coil (3). The digital output 1 (DO 1) controls switches
between (1) and (2) to feed (3).
Figure 9: External heating used as backup. To the left the DO 1 is open, and the
Swegon Heat pump feeds the heating coil. To the right the DO 1 is closed, and
the external heating feeds the heating coil
External cooling
If external cooling is used, the digital output 2 is set
whenever there is a system cooling demand, and at least
one of the following is true:
1.Swegon Chiller/Heat pump type is set to None or Heat.
2.There is one active Chiller/Heat pump alarm or one
active AQUA Link alarm
3.The Swegon Chiller/Heat pump is Reversible and is running in heating mode, or has been stopped due to time
limit before switching to cooling mode, and Heat limit
action is “Change” or ”Both”
When the Swegon Chiller/Heat pump type is Hybrid
system, the digital output 2 is set as soon as there is a
cooling demand.
If external cooling is used as backup, there are two variants of connection to the cooling coils. For the supply air
cooling, the Swegon Chiller/Swegon Reversible machine
feeds one of the sequences (Ordinary cooling and Extra
cooling) and the external (backup) cooling source feeds
the other one.
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NESTOR
Installation
System configuration
The Swegon software Golden Gate Config is used to
detect and perform basic network configurations in
Nestor. See NESTOR web manual for more information.
System configuration is performed either over Modbus
TCP or from the web instance via the Configuration page.
GOLD units and Super WISE units are connected by TCP/ IP
(RJ45) and by adding their IP addresses in the configuration
part of the NESTOR web page. The connected units can be
given customised names displayed in the system overview.
However, the number 1-8 are used in alarm lists and e-mail
notifications.
Note that on delivery Super WISE, GOLD and NESTOR all
have the same default IP address (10.200.1.1). Connect the
units one at a time to change the IP address. It is recommendable to use static IP addresses.
A Swegon Chiller/Heat pump is connected by EIA-485
and by adding the correct type in the configuration part
of the NESTOR web page.
Users and access privilege levels
There are four user access privilege levels: Administrator,
Service, Writer, Reader.
Only the administrator is able to add and manage users.
Mobile telephone number, e-mail address and access level
can be configured for each user.
The alarm notification settings need to be configured for
each user.
Restoring the factory settings
The Reset button on the Configuration/NESTOR page
restores all the function parameters to their respective
standard values. It is also possible to totally restore the factory
settings including restoration of communication settings, for
instance. This is done by closing the digital input (DI 6) and
switching the power supply off and on. 1 – 2 minutes after
switching on the power supply, remove the jumper for DI 6
(open the input). The factory settings will be restored when
the input is opened.
Software Update
The NESTOR software is updated through an SD memory
card. Insert the card with the software and select “Rescan
MMC” on the SW Update web page (Configurations).
Select “Update” and wait a few minutes for NESTOR to
update and reboot.
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NESTOR
Installation
System access – Communication
A BMS and a customer internal network can communicate
with NESTOR and other top level devices in the CMS system.
The NESTOR is connected to the bus and web page and
gives access to Modbus registers.
NESTOR data
NESTOR provides modbus registers, which contain the
alarm FIFO buffer and system level parameters. For more
detailed calibration of the system via Modbus TCP, any
BMS can communicate to any of the underlying products.
Subsystem access
All top level products can be accessed via TCP/IP as
separate slave (server) nodes. Hence, from a BMS point
of view, the system is the same as without a NESTOR
system. NESTOR just becomes a new node on the bus and
happens to act as a master AND slave (slave to the BMS,
master to the other nodes). If the network is connected to
the internet, all nodes can be accessed from the internet
either through the NESTOR web interface, or directly by
using their individual IP and Port numbers.
Figure 11: Schematic view of the network (green). The cloud symbolises an
external connection, for example, to a dial up modem, from which the web page
is accessible. The customer may add a firewall between the Swegon network
and its internal network. Note that a Customer firewall and the Modem/Internet
connection are not required.
Connections
A computer with web browser and support for Java applications is required for managing and operating NESTOR.
The computer can be connected directly to NESTOR, with
a cross-connected CAT5 cable with RJ45 connectors or
to a network (hub, switch or router) with a straight (not
cross-connected) CAT5 cable. Connect the cable to the
outlet marked ETHERNET on NESTOR. See Figure 12.
ETHERNET
NESTOR is delivered from the factory with a fixed IP
address. The first time you communicate with NESTOR,
use the Golden Gate Config software that can be downloaded from www.swegon.com. For more detailed information about how to wire NESTOR to underlying systems,
intelligent building automation, GOLD unit, Swegon
Chiller and Heat pumps, please refer to the installation
instructions for the specific product.
COM4
COM5
COM1 COM2 COM3
L1
N
PE
Figure 12: Connecting to NESTOR
Detailed information about communication with NESTOR
and using the web page is available in the web page manual,
which can be downloaded from www.swegon.com.
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NESTOR
User interface
The NESTOR user interface is a web page with sub pages
for system status summary, function configuration, alarm
list, system overview and administration.
The web pages are described thoroughly in the NESTOR
web manual, found on www.swegon.com.
Figure 10: Web page in the NESTOR user interface
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NESTOR
Notes
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We reserve the right to alter specifications.
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