Resol DeltaSol AX User manual

*48005520* 48005520
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DeltaSol® AX
www.resol.com
Manual
en-US/CA
Differential temperature controller
Manual for the specialized craftsman
Installation
Operation
Functions and options
Troubleshooting

2
en
© 20190924_48005520_DeltaSol_AX_115V.monus.indd
Safety advice
Please pay attention to the following safety advice in order to avoid danger and
damage to people and property.
Instructions
Attention should be paid to
• Valid national and local standards and regulations
• Respective valid standards and directives Equipment to be installed and used in
accordance with the rules of the National Electrical Code (NEC) or with Cana-
dian Electrical Code (CEC), Part I.
Information about the product
Proper usage
The differential temperature controller is designed for electronically controlling
solar thermal, heating and air conditioning systems in compliance with the technical
dataspeciedinthismanual.
Improper use excludes all liability claims.
Note
Strongelectromagneticeldscanimpairthefunctionofthedevice.
ÎMake sure the device as well as the system are not exposed to strong
electromagneticelds.
Subject to technical change. Errors excepted.
Target group
These instructions are exclusively addressed to authorized skilled personnel.
Onlyqualiedelectriciansareallowedtocarryoutelectricalworks.
Initialcommissioningmustbeeffectedbythesysteminstallerorqualiedpersonnel
named by the system installer.
Description of symbols
WARNING! Warnings are indicated with a warning triangle!
ÎThey contain information on how to avoid the danger
described.
Signal words describe the danger that may occur, when it is not avoided.
• WARNING means that injury, possibly life-threatening injury, can occur.
• ATTENTION means that damage to the appliance can occur.
Note
Notes are indicated with an information symbol.
Cross reference
A book symbol indicates a cross reference to another chapter.
ÎArrows indicate instruction steps that should be carried out.
Disposal
• Dispose of the packaging in an environmentally sound manner.
• Dispose of old appliances in an environmentally sound manner. Upon request we
will take back your old appliances bought from us and guarantee an environmen-
tally sound disposal of the devices.

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Contents
DeltaSol®AX differential temperature controller
The DeltaSol®AX controller is the simplest solution for all differential controls.
It is equipped with an adjustable temperature difference and an antifreeze function
which can be activated /deactivated by DIP switches.
Furthermore it is equipped with an adjustable target temperature for minimum or
maximum temperature limitation (adjustable by DIP switch).The enclosed silicone
sealing cord guarantees a protection against dripping water.
1 Overview .............................................................................................. 4
2 Installation ........................................................................................... 4
2.1 Mounting ........................................................................................................................4
2.2 Electrical connection ...................................................................................................6
3 Operation and function ...................................................................... 6
3.1 Flashing codes ...............................................................................................................6
3.2 DIP switches and potentiometers............................................................................6
3.3 Switch-on temperature difference............................................................................7
3.4 Manual mode.................................................................................................................7
3.5 Maximum temperature limitation.............................................................................7
3.6 Antifreeze function ......................................................................................................7
3.7 Minimum temperature limitation..............................................................................8
4 Examples .............................................................................................. 8
4.1 Standard solar system with 1 tank ...........................................................................8
4.2 Heating circuit return preheating .............................................................................9
4.3 Heat exchange control................................................................................................9
4.4 Tank loading by means of a solid fuel boiler ....................................................... 10
5 Accessories ........................................................................................ 10
6 Troubleshooting................................................................................. 10
139
45
Drill hole positions
112 mm

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1 Overview
Technical data
Inputs: 2 Pt1000 temperature sensors
Outputs: 1 electromechanical relay (changeover)
Switching capacity: 4 (1) A 115 V~ (electromechanical relay)
Total switching capacity: 4 A 115 V~
Power supply: 115 V~
Supply connection: type Y attachment
Power consumption 1.4 W
Mode of operation: Type 1.B
Rated impulse voltage: 2.5 kV
Functions: antifreeze function, maximum or minimum temperature limitation
Housing: plastic, PC-ABS and PMMA
Mounting: wall mounting
Indication / Display: 1 operating control LED
Operation: via potentiometres and DIP switches
Protection type: IP 20/ DIN EN 60529 (with seal IP 22)
Protection class: II
Ambient temperature: 0 … 40 °C / 32 … 104 °F
Degree of pollution: 2
Dimensions: Ø 139 mm / 5.2", depth 45 mm / 1.8"
• Adjustable temperature difference 2 … 16 K [3.6 … 28.8 °Ra],
hysteresis 1.6 K [2.9 °Ra]
• Antifreeze function adjustable by DIP switch
• Maximum or minimum temperature limitations adjustable
by DIP switch
• Protection against dripping water
2 Installation
2.1 Mounting
WARNING! Electric shock!
Upon opening the housing, live parts are exposed!
ÎAlways disconnect the controller from power supply
before opening the housing!
Note
Strongelectromagneticeldscanimpairthefunctionofthedevice.
ÎMake sure the device as well as the system are not exposed to strong
electromagneticelds.
The unit must only be located in dry interior rooms.
The controller must additionally be supplied from a double pole switch with contact
gap of at least 3 mm.
Please pay attention to separate routing of sensor cables and power supply cables.

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In order to mount the device to a wall, carry out the following steps:
1
112mm
2
45
67
3
8
ON
OFF
1234
2.2
T4A fuse
Power supply
connection
Relay (load)
Grounding terminal (common terminal block)
Sensor 2
Sensor 1
DIP switches
Switch-on temperature
difference potentiometer
Temperature limitation
potentiometer

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2.2 Electrical connection
WARNING! Electric shock!
Upon opening the housing, live parts are exposed!
ÎAlways disconnect the device from power supply
before opening the housing!
ATTENTION! ESD damage!
Electrostatic discharge can lead to damage to electronic com-
ponents!
ÎTake care to discharge properly before touching the
inside of the device! To do so, touch a grounded sur-
face such as a radiator or tap!
Note
Connecting the device to the power supply must always be the last step
of the installation!
The controller is supplied with power via a power supply cable.The power supply
of the device must be 115V~.
The controller is equipped with 1 electromechanical relay to which a load such as a
pump, a valve, etc. can be connected
• Relay 1
7 = normally open contact
8 = normally closed contact
9 = neutral conductor (N)
Grounding terminal ⌯(common terminal block)
• Connect the temperature sensors (S1 and S2) to the corresponding termi-
nals with either polarity:
1 / 2 = Sensor 1 (e. g. collector sensor)
3 / 4 = Sensor 2 (e. g. tank sensor)
• The power supply connection is at the terminals:
10 = neutral conductor (N)
11 = conductor (L)
Grounding terminal ⌯ (common terminal block)
3 Operation and function
3.1 Flashing codes
The operating control lamp indicates the current status of the controller.
Colour Permanent Flashing
Green Relay active Manual mode active, antifreeze
function active
Red Ready for operation Tank maximum temperature
exceeded, temperature has fallen
below minimum value
3.2 DIP switches and potentiometers
ON
OFF
1234
C
ON
OFF
1234
ON
OFF
1234
B
A
ON
OFF
1234

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The DIP switches (A) can be used for activating (ON) or deactivating (OFF) the
following functions:
• Manual mode (DIP switch 1)
• Maximum temperature limitation (DIP switch 2)
• Antifreeze function (DIP switch 3)
• Minimum temperature limitation (DIP switch 4)
With the lower potentiometer (B), the temperature for the maximum or minimum
temperature limitation can be adjusted (in °C).
With the upper potentiometer (C), the switch-on temperature difference can be
adjusted (in K).
3.3 Switch-on temperature difference
The controller calculates the temperature difference
between the temperature sensors S1 and S2. If the
difference is larger than or identical to the switch-on
value adjusted with the potentiometer C, the relay will
be switched on.The operating control LED is green. If
the temperature difference falls below the set value by
1.6 K / 2.9 °Ra (non-adjustable hysteresis), the control-
ler deactivates the relay.
For commissioning or maintenance work, the relay
can be permanently energized by means of the manual
mode.The manual mode can be activated or deactivated
respectively with DIP switch 1. If the manual mode is
active,theoperatingcontrollampashesredandgreen.
3.4 Manual mode
3.5 Maximum temperature limitation
With DIP switch 2, the temperature limitation can be
activated as a maximum temperature limitation. The
limit temperature can be adjusted by means of the po-
tentiometer B.The sensor connected to the terminals
S2 is used as the reference sensor. If the tank temper-
ature reaches the adjusted maximum temperature, the
tank will no longer be loaded in order to avoid damage
caused by overheating. If the tank temperature exceeds
the maximum value, the operating control lamp is red.
3.6 Antifreeze function
With DIP switch 3, the antifreeze function can be ac-
tivated. The antifreeze function activates the loading
circuit between the collector and the tank when the
collector temperature falls below +4 °C / 39,2 °F. This
willprotecttheuidagainstfreezingorcoagulating.If
the temperature at S1 reaches +5 °C/ 41°F, the pump
will be switched off.
When the antifreeze function is active, the operating
controllampashesquickly.
Adjustment range: 2 … 16 K
Factory setting: 6 K
Activated by default
(DIP switch in ON position)
Adjustment range: 20 … 90 °C
Factory setting: 60 °C
Deactivated by default
(DIP switch in OFF position)
Note
Since this function uses the limited heat quantity of the tank, the antifreeze
function should be used in regions with few days of temperatures around
the freezing point.
Deactivated by default
(DIP switch in OFF position)
Controller in automatic mode
ON
OFF
1234
C
ON
OFF
1234
A
ON
OFF
1234
ON
OFF
1234
B
ON
OFF
1234
A
ON
OFF
1234
ON
OFF
1234
A
ON
OFF
1234

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3.7 Minimum temperature limitation
With DIP switch 4, the temperature limitation can be
activated as a minimum temperature limitation. The
limit temperature can be adjusted by means of the po-
tentiometer B.The sensor connected to the terminals
S1 is used as the reference sensor. The minimum col-
lector temperature is the minimum switch-on temper-
ature which must be exceeded for the solar pump (R1)
to switch on. If the collector temperature falls below
the adjusted minimum temperature, the operating con-
trolLEDashesred.
4 Examples
4.1 Standard solar system with 1 tank
S1
RO
S2
⌯Use grounding terminals!
The controller calculates the temperature difference
between collector sensor S1 and tank sensor S2. If the
difference is larger than or identical to the adjusted
switch-on temperature difference, the pump (R1) will
be switched on and the tank will be loaded. If the tem-
perature difference falls by 1.6 K / 2.9 °Ra (non-adjusta-
ble hysteresis) below the adjusted temperature differ-
ence, the pump will be switched off.
S1 = Collector sensor
S2 = Tank sensor
RO = Solar pump
Deactivated by default (DIP
switch in OFF position), de-
fault setting upon activation:
60 °C
Power
supply
ON
OFF
1234
B
B
ON
OFF
1234
C
ON
OFF
1234
A
ON
OFF
1234
ON
OFF
1234
A
ON
OFF
1234
1
S1 S2
2 3 4 7
RO RC N N L
8 9 10 11
22 33

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4.3 Heat exchange control
⌯Use grounding terminals!
1
S1 S2
2 3 4 7
RO RC N N L
8 9 10 11
22 33
S2
S1
RO
When the temperature difference between sensor 1
(tank 1) and sensor 2 (tank 2) exceeds the adjusted
value, the circulating pump will be activated. Heat will
be transferred from tank 1 into tank 2. If the temper-
ature difference falls by 1.6 K / 2.9 °Ra (non-adjustable
hysteresis) below the adjusted temperature difference,
the pump will be switched off.
S1 = Sensor tank 1
S2 = Sensor tank 2
RO = Circulating pump
4.2 Heating circuit return preheating
⌯Use grounding terminals!
The controller calculates the temperature difference
between collector sensor S1 and tank sensor S2. If the
difference is larger than or identical to the adjusted
switch-on value, the controller switched the 3-port
valve.The heat of the tank is used for increasing the re-
turn temperature of the heating circuit. If the temper-
ature difference falls by 1.6 K /2.9°Ra (non-adjustable
hysteresis) below the adjusted temperature difference,
the valve will be put into its initial position.
S1 = Tank sensor
S2 = Heating circuit return sensor
RO = 3-port valve
1
S1 S2
2 3 4 7
RO RC N N L
8 9 10 11
22 33
S1
RO
S2
Power
supply
Power
supply
ON
OFF
1234
C
A
ON
OFF
1234
C
A
ON
OFF
1234
ON
OFF
1234

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4.4 Tank loading by means of a solid fuel boiler
1
S1 S2
2 3 4 7
RO RC N N L
8 9 10 11
22 33
S1
RO
S2
⌯Use grounding terminals!
The controller calculates the temperature difference
between solid fuel boiler sensor S1 and tank sensor
S2. The relay (RO) is energized when both switch-on
conditionsarefullled:
• the temperature difference has exceeded the switch-
on value
• the temperature at the solid fuel boiler sensor has
exceeded the minimum temperature
If the temperature difference falls by 1.6 K / 2.9 °Ra
(non-adjustable hysteresis) below the adjusted tem-
perature difference, the pump will be switched off.
S1 = Solid fuel boiler sensor
S2 = Tank sensor
RO = Circulating pump
5 Accessories
SP10 Overvoltage
protection device
HR230 Auxiliary relay
6 Troubleshooting
Spare fuse
(inside the cover)
In the case of an error, please check the following:
Check the supply line and recon-
nect it.
The fuse of the controller could be
blown.The fuse holder (which holds
the spare fuse) becomes accessible
when the cover is removed.The fuse
can then be replaced.
Check the power supply of the controller. Is it disconnected?
no yes
Power
supply
B
ON
OFF
1234
C
ON
OFF
1234
A
ON
OFF
1234