Watts Lync AEGIS User manual

Electronic Controller User Manual
Lync AEGIS Controller
Disclaimer
The information contained in this manual is subject to change without notice
from Watts Heating and Hot Water Solutions LLC dba Lync by Watts ("Lync").
Lync makes no warranty of any kind with respect to this material, including,
but not limited to, implied warranties of merchantability and fitness for a
particular application. Lync is not liable for errors appearing in this manual, nor
for incidental or consequential damages occurring in connection with the
furnishing, performance, or use of these materials.
L-OMM-013_A •4/20/2022
Engineered Solutions
Lync • 425 W Everman Pkway, St. 101 • Fort Worth, TX 76134
USA: T: [phone]
Technical Support • [phone] (ext. 3) • Mon-Fri, 8 am - 5 pm CST
© 2022 LYNC

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Table of Contents
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CONTENTS
1. INTRODUCTION...................................................................................................................................5
1.1. Supported Unit Types ..............................................................................................................5
1.2. Operating Principle....................................................................................................................6
1.3. Sequence Of Operation .............................................................................................................6
1.4. Version With Cool Recovery (Air Source Unit Only) .................................................................8
1.5. Domestic Hot Water Pump Management..................................................................................8
1.6. Superheat Set Limit...................................................................................................................9
1.7. High Inlet Temperature (Hit) Function.......................................................................................9
1.8. High Pressure Set Point Calculation .........................................................................................9
1.9. Anti-Legionella.........................................................................................................................10
1.9.1. PHASE 1..................................................................................................................11
1.9.2. PHASE 2..................................................................................................................11
2. USER OPERATION VIA TOUCH SCREEN.......................................................................................12
2.1. Touch Screen ..........................................................................................................................12
2.2. About The Application For Unit................................................................................................12
2.3. Homepage...............................................................................................................................12
2.4. On/Off Command ....................................................................................................................13
2.5. Led Bar....................................................................................................................................15
2.6. Unit Main Info...........................................................................................................................15
2.6.1. Unit Main Info 1 –Ref- Circuit Hot Side and User Water Side..................................16
2.6.2. Unit Main Info 2 –Superheating...............................................................................17
2.6.3. Unit Main Info –A/W Configuration Source Side......................................................17
2.6.4. Unit Main Info –Cold Recovery Option Source Side................................................18
2.6.5. Unit Main Info –Water Source Side .........................................................................19
2.7. Setpoint Menu..........................................................................................................................19
2.8. Main Menu...............................................................................................................................22
2.8.6. Main Menu –Unit Variables .....................................................................................23
2.8.7. Main Menu –Display Settings..................................................................................24
2.8.8. Main Menu –Initialization.........................................................................................25
2.9. Alarm Management .................................................................................................................26
2.9.1. Active Alarms...........................................................................................................26
2.9.2. Alarm History ...........................................................................................................26
3. USER OPERATION VIA WEB INTERFACE......................................................................................27
3.1.1. Web Server Main Page (Home) ...............................................................................27
3.1.2. Unit On/Off Via Web Interface (Or BMS) Only..........................................................29
3.1.3. Unit On/Off Management Via Web Server................................................................29
3.1.4. Unit On/Off Via Web And External Thermal Request ...............................................30
3.1.5. Main Menu...............................................................................................................31
3.1.6. User Settings ...........................................................................................................32

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3.1.7. Double Probe...........................................................................................................32
3.1.8. Cold Recovery Regulation........................................................................................33
3.1.9. Input/Outputs ...........................................................................................................34
3.1.10. Trend Log...............................................................................................................35
3.1.11. SD Data Stored......................................................................................................36
3.1.12. Alarm Log...............................................................................................................37
3.2. Service.....................................................................................................................................37
3.2.1. Service Settings.......................................................................................................38
3.3. Defrost Config..........................................................................................................................38
3.3.2. Fixed Mode..............................................................................................................39
3.3.3. Dynamic Mode.........................................................................................................39
3.4. Antilegionella Config................................................................................................................41
3.4.1. Phase 1....................................................................................................................41
3.4.2. Phase 2....................................................................................................................41
3.5. Logger......................................................................................................................................43
3.6. Polynomial...............................................................................................................................43
3.7. User Management...................................................................................................................45
3.8. Modbus....................................................................................................................................46
3.9. Control Panel...........................................................................................................................47
3.10. Logout......................................................................................................................................47
4. APPENDIX A - INTERNAL CONTROL SPECIFICATIONS & TECHNICAL DATA..........................49
5. APPENDIX B –TOUCH SCREEN ELECTRICAL CONNECTIONS..................................................54
6. TECHNICAL SPECIFICATIONS........................................................................................................55
7. APPENDIX C - ACCESS TO THE WEB SERVER ............................................................................57
7.1. Ethernet Connection................................................................................................................57
7.1.3. Ethernet Port............................................................................................................57
8. APPENDIX D ......................................................................................................................................64
8.1. Operation With Built-In Display................................................................................................64
8.2. General Information.................................................................................................................64
8.3. Key Function............................................................................................................................64
8.4. Menu Navigation......................................................................................................................65
8.5. Home Page..............................................................................................................................65
8.6. General Data Screen ..................................................................................................................66
8.7. Switching On/Off From Digital Input........................................................................................67
8.7.4. General On/Off From Digital Input............................................................................67
8.7.5. Digital Input –“HW Request”....................................................................................68
8.8. Switching On/Off From Supervision System (Remote Control) ..............................................68
8.9. Main Menu...............................................................................................................................70
8.9.6. Menu - A Settings.....................................................................................................71
8.9.7. MENU - AA SET POINT...........................................................................................72

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8.9.8. MENU - Ab DOUBLE PROBE..................................................................................72
8.9.9. MENU - AC CW RECOVERY (COOL RECOVERY).................................................74
8.9.10. MENU - B I/O VALUES ........................................................................................75
8.9.11. MENU - Ba Analog Inputs ....................................................................................76
8.9.12. MENU - Bb Analog Inputs ....................................................................................77
8.9.13. MENU - Bc Digital Inputs .....................................................................................77
8.9.14. MENU - Bd Digital Outputs ..................................................................................78
8.9.15. Menu - C Alarms ..................................................................................................79
8.9.16. Menu - D Warnings ................................................................................................81
8.9.17. Menu - E Alarms Log .............................................................................................82
8.9.18. Menu - F Defrost....................................................................................................82
8.9.19. MENU - G CLOCK SET .........................................................................................84
8.9.20. MENU - H SERVICE ..............................................................................................84
8.9.21. MENU - I MANUFACTURER ..................................................................................84
8.10. Service Menu ..........................................................................................................................85
8.10.1. Menu - St Set Point.............................................................................................86
8.10.2. MENU - RC Remote control................................................................................86
8.10.3. Menu - Ai Anti-Freeze ............................................................................................86
8.11. Hot Side Anti-Freeze...............................................................................................................88
8.12. Cold Side Anti-Freeze (Recovery/Source) ..............................................................................90
8.12.4. MENU - MD RS485 -1 Config................................................................................90
8.12.5. Menu - Et Ethernet..............................................................................................93
8.12.6. Menu - Df Defrost................................................................................................94
8.12.7. Df01 = 0 - Defrost At A Fixed Evaporation Temperature.........................................94
8.12.8. Df01 = 1 - Defrost At A Dynamic Evaporation Temperature (Default Setting).........94
8.12.9. Forced Defrost .......................................................................................................95
8.12.10. Menu - Cr Cold Recovery.....................................................................................96
8.12.11. Menu - Sw Source Water .....................................................................................96
8.12.12. Menu - Ba Bacnet IP.........................................................................................97
8.12.13. Menu - Cth –Condenser Tray Heaters.................................................................98
8.12.14. MENU –SHC –Secondary hydraulic circuit.........................................................99

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1. INTRODUCTION
The Aegis heat pump water heater comes equipped standard with an Eliwell PLC controller,
Carel touchscreen interface, and an available LAN interface. The Aegis heat pump software
can be fully parameterized and configured. Certain configurations depend on plant
engineering choices and must not be changed in any way except by expert personnel.
The unit can be controlled in three ways:
1. Directly via the built-in display on the main electronic controller
2. Via remote terminal/touch screen
3. Via web interface via local network or remote VPN connection
The three control methods are equivalent, however there are different levels of access through
dedicated passwords, to limit access to certain functions.
1.1.Supported Unit Types
Figure 1-1: Air Source Heat Pump (A/W)
Figure 1-2: Air Source With Cool Recovery (A/W with CW recovery)

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Figure 1-3: Water Source Heat Pump(W/W)
1.2. Operating Principle
The unit control software is responsible for regulating the outlet water temperature from
the appliance. The parameter displayed as " ST01 Set Hot Water" is user adjustable.
Additionally, the unit control manages the circulation of water in orderto ensure that the
correct temperature rise in the system is maintained and will determine the need for hot
water demand by monitoring the water temperature in the storage tanks.
Please note that the delivery temperature is regulated by modulating the pump, therefore the
flow of hot water at the outlet is not constant.
1.3. Sequence Of Operation
The hot water storage tanks used in this heating system must be equipped with the two
provided temperature sensors, or other sensors meeting requirements for a NTC 10k sensor.
The optional BT2 sensor (hot side probe) is located in the top of the last storage tank in the
series, near the supply outlet. The (BT1) sensor (cold side probe) is placed in the bottom of the
first storage, near cold return water connection.
The BT3 sensor is locatedon the outlet of the external heat exchanger (see dedicated
section) and is needed to modulate the circulation pump placed between the heat

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exchanger and the storage tanks. Installation of BT1, BT2, and BT3 probes must be done by
the installer prior to operation.
Note that the tanks must be hydraulically connected in series as shown below, not in
parallel.
WhenthetemperatureprobeBT1reachesthevalue"Setpointunit ON", (set point (ST03) minus
differential (ST04) ), the unit will beturned on. The unit will continuetoheatthe water tothe
settemperature as long asthe temperature BT1 remains below the “Set point unit OFF” value
(ST03). Once BT1 reaches "Set point unit OFF" the unit will be turned off.
To limit the possible discomfort that can be generated by excessive heat dissipationthe
probe BT2 maybeusedtooperate a "comfort" function. Inthis case, even if the temperature
BT1 is higher than the value of "Set point unit OFF", the unit operate when the BT2 is lower than
a value of "Set point comfort ON".
Operation with only the BT1 probe is allowed, while the use of the BT2 probe requires the
presence of the BT1 probe. The unit will turn off only when both the BT1 and BT2 temperatures
are greater than the related set points.
BT3 probe –secondary
side pump modulation
Set Point ON
comfort
Set Point OFF
comfort

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I M P O R T A N T
The unit will begin to run with only the BT1 probe, regardless of BT2 probe. If the
unit runs based on the BT2 probe, regulation with BT1 probe will also start
automatically, even if the starting parameter (ST02) is OFF.
Please refer to Aegis Electronic Controller Manual (L-OMM-013) for information on enabling and
choosing between local analog and remote digital input.
1.4. Version With Cool Recovery (Air Source Unit Only)
Using the cool recovery option, heat can be drawn from a water streamrather than the ambient
air, thus providing cooling toa water loop. This can be usedtonot only increase the performance
of theheat pump,butalso increase the performance of water loops such as a central chilled
water system. See Aegis Electronic Controller Manual (L-OMM-013) for further details on
how to activate and control this function. NOTE: This option is available only for the Air
source unit.
1.5. Domestic Hot Water Pump Management
The software also manages the domestic hot water pump. The start, minimum and maximum
speed can be adjusted separately for both pumps. The domestic hot water pump can be active
when the unit is in standby, but this setting is strongly not recommended, to avoid the
destratification of the temperature in the tanks.
Please note that the main unit pump and the domestic hot water
pump operate with coordinated set points in the sense that an offset
(that can be set by the user) is subtracted from the unit set point
ST1 and it is used to regulate the domestic hot water pump referred
to the BT3 probe. It is needed to apply a regulation offset (it must be
negative) to adjust the secondary pump set point to take in
consideration the temperature losses in the plate exchanger.

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NOTE: Speed regulation of the domestic hot water pump is independent of the internal pump.
1.6. Superheat Set Limit
For inlet watertemperature > 30°C (>86°F)the superheatingis managedby 3-way bypass valve
in combinationtospecific software improvements. The High Inlet Temperature (HIT)
Function limits the superheat value with the use of the bypass valve, keeping in
consideration both the compressor oil temperature and the compressor discharge temperature.
In order to optimize the cycle efficiency and at the same time avoid too high temperatures to the
compressor, the target superheat value is not constant, but will be adjusted according to the
compressor discharge temperature and compressor oil temperature.
This superheat limit should not be changed by a user except under direction from the
manufacturer or an authorized manufacturer’s representative.
1.7. High Inlet Temperature (Hit) Function
The HIT function (provided as an option) allows the heat pump to operate even with inlet water
temperatures above the standard limits. It is utilized:
•for the anti-Legionella treatment (tank temperature > 60 °C (>140°F), see below)
•when domestic water recirculation is used with low water demand
•when heat pump stops for a long time and the tank thermally stratifies.
1.8. High Pressure Set Point Calculation

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The high pressure set point is not fixed, but instead is calculated based on inlet water
temperature, outlet water temperature, and evaporation temperature. The pressure is managed
by the thermostatic valve.
The setpoint value is limited between a minimum and a maximum fixed value. Within these limit
values is also active a compensation curve based on the evaporator temperature that keeps the
compressor within the required operating envelope.
1.9. Anti-Legionella
Legionellosis is an infection caused by aerobic bacteria of the genus Legionella that mainly
affects the respiratory system.
The proliferation of Legionella depends on the water temperature. As can be seen from the chart
below, the disinfection is feasible through thermal shock.
Figure 1-4: Legionella Growth Chart
1
The anti-Legionella function raises the water storage tanks to a high temperature and
subsequently circulates to ensure complete disinfection of the system.
The anti-Legionella function, if enabled via “ALG01 Enable anti-Legionella” is activated based
on a time band (if “ALG02 Enable scheduler” is set) or manually via web interface / BMS
(“ALG16 Manual start” and ”ALG17 Manual stop”).
The conditions necessary to make the anti-Legionella function activable are:
• Aegis unit active (Unit ON)
• anti-Legionella function enabled (parameter ALG01 set to ON)
•no BTL probe alarm
•no BT1 probe alarm
• absence of expansion # 1 offline alarm
• absence of expansion # 2 offline alarm
1
Freije, Matthew R. How to Make Plumbing Systems Less Conducive to Legionella and Other Bacteria.
HC Information Resources, 1998.

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The anti-Legionella cycle consists of two phases - in phase 1 the compressor is active, and the
pump modulates as per standard thermoregulation (on “ALG10 Unit anti-Legionella
set”), while in phase 2 the compressor is inactive, and the pump forced to default speed (on
“ALG11 Unit phase 2 pump set”):
1.9.1. PHASE 1
The "Anti-Legionella active" relay contact is closed.
The set point “ALG10 Anti-Legionella unit set” is forced (e.g.176-194°F [80-90 ° C]);
Phase 1 ends when the BT1 probe rises above “ALG08 Phase 1 set BT1” (default = 140°F [60 °
C]) and at the same time the BTL probe reaches at least the “ALG09 Phase 1 set BTL” (default =
131°F [55 ° C]).
1.9.2. PHASE 2
The "Anti-Legionella active" relay contact remains closed
The "Anti-Legionella phase 1 completed" relay contact is closed
At the end of phase 1 the compressor switches off while the secondary pump is brought to a
fixed speed “ALG11 Unit phase 2 pump set” until the BTL probe reaches the “ALG09 Phase
2 set BTL” (e.g. 70 ° C). The anti-Legionella cycle is considered concluded when this
condition persists for a period of time “ALG12 Min. time phase 2” (e.g. 1 min).
At the end of the cycle, the "Anti-Legionella active" and "Anti-Legionella phase 1 completed"
relay contacts are opened.
NOTE: The maximum time parameter of the anti-Legionella cycle “ALG06 Anti-Legionella max
time” is provided (e.g. 120 min.) after which the unit returns to normal operation.
NOTE: In a defrost cycle, the defrost function has priority over the anti-Legionella function.

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2. USER OPERATION VIA TOUCH SCREEN
2.1. Touch Screen
The touch screen 4.3 inch graphic terminal is designed to simplify user interface with the unit.
The electronic technology used and the 65K color display means high quality images and
advanced functions are available for a superior appearance. The touchscreen panel makes unit
operation much easier by simplifying navigation between the various screens.
2.2. About The Application For Unit
The touch user interface communicates with the internal controller to provide easy unit
operation. This application gives the user an overview of the main parts and controls of the
machine, visualization of the setpoints, the status of the main devices, and the control of the unit
mode, without needing to open the unit electrical cabinet.
In order to communicate with the main control, the touch interface is connected through the
RS485-2 serial port with the Modbus RTU protocol with a baud rate of 34800 and a
communication set of 8N1.
2.3. Homepage
The homepage displays the main operating data of the unit: the unit ON / OFF status, the water
inlet and outlet temperatures, as well as the status of the compressor, pump and fan speed.
At the bottom there are icons for accessing additional screens, explained in the next sections. In
the presence of any alarms, their number is indicated in a red circle in the upper right corner.
Press the bell icon to view its description.

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Legend
1. Main Menu and Homepage
2. Unit status
3. Compressor status
4. Primary water pump status
5. Outlet water temperature
6. Set point regulation
7. Unit Main Info
8. On/Off command
9. Input/Output list
10. Inlet water temperature
11. Alarms and warnings page
12. Date and time
2.4. On/Off Command
The ON/OFF command is accessible from the homepage by pressing the icon:

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The unit can be then turned ON or OFF via touch screen pressing the corresponding icon:
In order to use only the touch screen and no additional mechanical thermostats to switch the unit
ON and OFF please access to the unit web server (see previous section), press the “REMOTE
CONTROL” button located in the central area of the main screen, and set the parameters as
follows:
The RC01 Remote control parameter needs to be enabled and RC03 Thermal request by set to
“Supervision”. It will be still possible to use the internal web server to switch the unit ON/OFF,
there is no priority between the two possibilities, the unit will execute the last issued command,

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2.5. Led Bar
The led bar on the right side helps the user to recognize the status of the unit when the screen of
is in stand-by mode. Three colors are used to identify the unit’s status:
•Green →The unit is on and running
•White →The unit is on and in stand-by mode
•Red blinking →There is an alarm or warning active
2.6. Unit Main Info
Detailed unit information is accessible from the homepage by pressing the icon:
Click on the unit main info icon to see the screens showing the details about the current unit
status. Move between info screens using the arrow keys.

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2.6.1. Unit Main Info 1 –Ref- Circuit Hot Side and User Water Side
Legend
1. Refrigerant high pressure –discharge temperature
2. Low pressure –suction temperature
3. Compressor oil temperature
4. Compressor status (On/Off)
5. Refrigerant temperature after gas cooler
6. Utility hot water inlet
7. Primary water pump speed in percentage
8. Secondary water pump speed in percentage ( optional/selectable )
9. Secondary side water temperature ( optional/selectable )
10. Utility hot water outlet

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2.6.2. Unit Main Info 2 –Superheating
1. Oil valve status
2. Electronic expansion valve opening status (percent)
3. Superheating temperature
4. Evaporation temperature
5. Refrigerant temperature after gas cooler
6. Refrigerant low pressure / temperature before gas cooler
2.6.3. Unit Main Info –A/W Configuration Source Side
1. Source water inlet temperature
2. Condenser fan speed (percent)
3. Coil pack temperature

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4. Defrost start phase (percent)
5. Defrost central phase (percent)
6. Drop off phase (percent)
7. Waiting phase (percent)
2.6.4. Unit Main Info –Cold Recovery Option Source Side
1. External air temperature
2. Source cold water inlet
3. Source water pump status (On/Off)
4. Source cold water outlet
5. Recovery system status
6. Coil pack temperature
7. Fan speed in percentage
8. Defrost phase info
9. Subcooling temperature

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2.6.5. Unit Main Info –Water Source Side
1. Source inlet water temperature
2. Source pump water status (On/Off)
3. Coil pack temperature
4. Subcooling temperature
2.7. Setpoint Menu
It is possible to modify the unit set points by pressing the Set icon from the homepage:
The user can set both the delivery water (Hot water set point) and the tank temperature sets BT1
and BT2.

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1. Domestic hot water temperature set point
2. Enable temp. probe on the first (coldest) tank
3. Setpoint of the temp. probe on the first (coldest) tank
4. Enable the temp. probe on the last (hottest) tank
5. Set point of the temp. probe on the last (hottest) tank
6. Temperature differential band of the probe on the second tank
Please note that the “Hot water set point” doesn’t directly influence the compressor ON/OFF
status. The delivery temperature is regulated by modulating the primary side pump, therefore the
flow of hot water at the outlet is not constant.
If the outlet temperature probe is below the set point the pump speed is decreased, while above
the set temperature is increased.