Resol DeltaSol AX User manual

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DeltaSol® AX
www.resol.com
Manual
en
Differential temperature controller
Manual for the specialised craftsman
Installation
Operation
Functions and options
Troubleshooting

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© 20180705_48000250_DeltaSol_AX.monen_neu.indd
Safety advice
Please pay attention to the following safety advice in order to avoid danger and
damage to people and property.
Instructions
Attention must be paid to the valid local standards, regulations and directives!
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.
CE Declaration of conformity
The product complies with the relevant directives and is therefore
labelled with the CE mark. The Declaration of Conformity is available
upon request, please contact the manufacturer.
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 authorised skilled personnel.
Only qualied electricians should carry out electrical works.
Initial installation must be effected by the system owner or qualied personnel
named by the system owner.
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.
• At the end of its working life,the product must not be disposed of as urban waste.
Old appliances must be disposed of by an authorised body in an environmentally
sound manner. Upon request we will take back your old appliances bought from
us and guarantee an environmentally 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 potentiometres............................................................................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 store .........................................................................8
4.2 Heating circuit return preheating .............................................................................9
4.3 Heat exchange control................................................................................................9
4.4 Store loading by means of a solid fuel boiler...................................................... 10
5 Accessories ........................................................................................ 10
6 Troubleshooting................................................................................. 10
130
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 240 V~ (electromechanical relay)
Total switching capacity: 4 A 240 V~
Power supply: 220 … 240 V~ (50 … 60 Hz)
Supply connection: type Y attachment
Standby: 1.36 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: 2 potentiometres, 4 DIP switches
Protection type: IP 20/DIN EN 60529 (with seal IP 22)
Protection class: II
Ambient temperature: 0 … 40 °C
Degree of pollution: 2
Dimensions: Ø 139 mm, depth 45 mm
• Adjustable temperature difference 2 … 16 K, hysteresis 1.6 K
• 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 mains 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
Mains connection
Relay (load)
Grounding terminal
(common terminal block)
Sensor 2
Sensor 1
DIP switches
Switch-on temperature
difference potentiometre
Temperature limitation
potentiometre

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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 mains cable. The power supply of the
device must be 220…240 V~ (50 … 60 Hz).
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. store sensor)
• The mains 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 Normal operation, relay active Manual mode active, antifreeze
function active
Red Ready for operation Store maximum temperature
exceeded, temperature has fallen
below minimum value
3.2 DIP switches and potentiometres
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 (non-adjustable hysteresis), the controller deacti-
vates the relay.The operating control LED is red.
For commissioning or maintenance work, the relay
can be permanently energised 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 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 store tem-
perature reaches the adjusted maximum temperature,
the store will no longer be loaded in order to avoid
damage caused by overheating. If the store tempera-
ture exceeds the maximum value, the operating con-
trol lamp is red.
3.6 Antifreeze function
With DIP switch 3, the antifreeze function can be acti-
vated.The antifreeze function activates the loading cir-
cuit between the collector and the store when the col-
lector temperature falls below +4°C.This will protect
the uid against freezing or coagulating. If the tempera-
ture at S1 reaches +5 °C, the pump will be switched off.
When the antifreeze function is active, the operating
control lamp ashes green.
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 store, the anti-
freeze 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 store
1
S1 S2
2347
RO RC NNL
8910 11
S1
RO
S2
⌯Use grounding terminals!
The controller calculates the temperature difference
between collector sensor S1 and store sensor S2. If
the difference is larger than or identical to the adjust-
ed switch-on temperature difference, the pump (R1)
will be switched on and the store will be loaded. If the
temperature difference falls by 1.6 K (non-adjustable
hysteresis) below the adjusted temperature difference,
the pump will be switched off.
S1 = Collector sensor
S2 = Store sensor
RO = Solar pump
Deactivated by default (DIP
switch in OFF position), de-
fault setting upon activation:
60 °C
Mains
ON
OFF
1234
B
B
ON
OFF
1234
C
ON
OFF
1234
A
ON
OFF
1234
ON
OFF
1234
A
ON
OFF
1234

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4.3 Heat exchange control
⌯Use grounding terminals!
1
S1 S2
2347
RO RC NNL
8910 11
S2
S1
RO
When the temperature difference between sensor 1
(store 1) and sensor 2 (store 2) exceeds the adjust-
ed value, the circulating pump will be activated. Heat
will be transferred from store 1 into store 2. If the
temperature difference falls by 1.6 K (non-adjustable
hysteresis) below the adjusted temperature difference,
the pump will be switched off.
S1 = Sensor store 1
S2 = Sensor store 2
RO = Circulating pump
4.2 Heating circuit return preheating
Use grounding terminals!
The controller calculates the temperature difference
between collector sensor S1 and store sensor S2. If
the difference is larger than or identical to the adjust-
ed switch-on value, the controller switches the 3-port
valve. The heat of the store is used for increasing the
return temperature of the heating circuit. If the tem-
perature difference falls by 1.6K (non-adjustable hys-
teresis) below the adjusted temperature difference, the
valve will be put into its initial position.
S1 = Store sensor
S2 = Heating circuit return sensor
RO = 3-port valve
1
S1 S2
2347
RO RC NNL
8910 11
S1
RO
S2
Mains Mains
ON
OFF
1234
C
A
ON
OFF
1234
C
A
ON
OFF
1234
ON
OFF
1234

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4.4 Store loading by means of a solid fuel boiler
1
S1 S2
2347
RO RC NNL
8910 11
S1
RO
S2
Use grounding terminals!
The controller calculates the temperature difference
between solid fuel boiler sensor S1 and store sensor
S2. The relay (RO) is energised 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 1.6K (non-adjust-
able hysteresis) below the adjusted temperature differ-
ence, the pump will be switched off.
S1 = Solid fuel boiler sensor
S2 = Store 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
Mains
B
ON
OFF
1234
C
ON
OFF
1234
A
ON
OFF
1234

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°C °F Ω
Pt1000
°C °F Ω
Pt1000
-10 14 961 55 131 1213
-5 23 980 60 140 1232
0 32 1000 65 149 1252
5 41 1019 70 158 1271
10 50 1039 75 167 1290
15 59 1058 80 176 1309
20 68 1078 85 185 1328
25 77 1097 90 194 1347
30 86 1117 95 203 1366
35 95 1136 100 212 1385
40 104 1155 105 221 1404
45 113 1175 110 230 1423
50 122 1194 115 239 1442
Note:
For answers to frequently asked questions (FAQ) see www.resol.com.
Disconnected temperature sensors can be checked with an ohmmeter. Please
check if the resistance values correspond with the table.

Distributed by: RESOL –Elektronische Regelungen GmbH
Heiskampstraße 10
45527 Hattingen / Germany
Tel.: [phone] / 96 48 - 0
Fax: [phone] / 96 48 - 755
www.resol.com
[email protected]
Important note
The texts and drawings in this manual are correct to the best of our knowledge.As
faults can never be excluded, please note:
Your own calculations and plans, under consideration of the current standards and
directions should only be basis for your projects.We do not offer a guarantee for
the completeness of the drawings and texts of this manual - they only represent
some examples.They can only be used at your own risk. No liability is assumed for
incorrect, incomplete or false information and / or the resulting damages.
Note
The design and the specications can be changed without notice.
The illustrations may differ from the original product.
Imprint
This mounting- and operation manual including all parts is copyrighted. Another
use outside the copyright requires the approval of RESOL – Elektronische Rege-
lungen GmbH. This especially applies for copies, translations, micro lms and the
storage into electronic systems.
© RESOL – Elektronische Regelungen GmbH