Resol DeltaSol CS Plus User manual

*11202673* 11202673
Thank you for buying this RESOL product.
Read this manual carefully to get the best perfomance from this unit.
Please keep this manual carefully.
DeltaSol®CS Plus
www.resol.com
Manual
en
Mounting
Connection
Application examples
Operation
Troubleshooting
version 1.10

en
2
Information about the product
Proper usage
The solar controller is designed for use in solar thermal systems and heating sys-
tems in compliance with the technical data specified in this manual.
Improper use excludes all liability claims.
CE Declaration of conformity
The product complies with the relevant directives and is therefore la-
belled with the CE mark. The Declaration of Conformity is available
upon request, please contact the manufacturer.
Note
Strong electromagnetic fields can impair the function of the controller.
ÎMake sure the controller as well as the system are not exposed to
strong electromagnetic fields.
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 envi-
ronmentally sound disposal of the devices.
Subject to technical change. Errors excepted.
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!
Target group
These instructions are exclusively addressed to authorised skilled personnel.
Only qualified electricians should carry out electrical works.
Initial installation must be effected by qualified personnel named by the manufac-
turer.
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.
ÎArrows indicate instruction steps that should be carried out.
© 20150206_11202673_DeltaSol_CS_Plus.monen.indd

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Contents
1 Installation ........................................................................................... 5
1.1 Mounting ........................................................................................................................5
1.2 Electrical connection ...................................................................................................5
1.3 VFD Grundfos Direct Sensor™...............................................................................7
1.4 PWM outputs................................................................................................................7
1.5 Data communication / Bus ..........................................................................................7
1.6 Terminal allocation in the different system layouts ..............................................8
2 Operation and function .................................................................... 46
2.1 Push buttons............................................................................................................... 46
2.2 System-Monitoring-Display ..................................................................................... 46
2.3 Flashing codes ............................................................................................................ 47
3 Commissioning.................................................................................. 48
4 Channel overview .............................................................................. 51
4.1 Display channels......................................................................................................... 51
4.2 Adjustment channels ................................................................................................ 54
5 Troubleshooting................................................................................. 67
5.1 Various......................................................................................................................... 68
6 Accessories ........................................................................................ 70

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Overview
• System-Monitoring-Display
• Up to 4 Pt1000 temperature sensors
• 2 semiconductor relays for pump speed control
• 10 basic system layouts to choose from
• 1 input for aVFD Grundfos Direct Sensor™
• Heat quantity measurement
• VBus®
• Function control
• Thermostat function (time-controlled)
• Control of the system by ServiceCenter software possible
• User-friendly operation
• Housing with outstanding design
• Extra-low power consumption
• HE pump control
• Drainback option
Technical data
Inputs: 4 Pt1000 temperature sensors, 1 VFD Grundfos Direct Sensor™
Outputs: 2 semiconductor relays, 2 PWM outputs
PWM frequency: 512 Hz
PWM voltage: 10,5 V
Switching capacity:
R1: 1 (1) A 100 ... 240 V~ (semiconductor relay)
R2: 1 (1) A 100 ... 240 V~ (semiconductor relay)
Total switching capacity: 2 A 240 V~
Power supply: 100 … 240 V~ (50 … 60 Hz)
Supply connection: type Y attachment
Power consumption: < 1 W (standby)
Mode of operation: type 1.C.Y action
Rated impulse voltage: 2.5 kV
Data interface: RESOL VBus®
VBus®current supply: 35 mA
Functions: function control, operating hours counter, tube collector function,
thermostat function, speed control, drainback option with booster function and
heat quantity measurement
Housing: plastic, PC-ABS and PMMA
Mounting: wall mounting, mounting into patch panels is possible
Indication / Display: System-Monitoring-Display for visualisation of systems,
16-segment and 7-segment display, 8 symbols for indication of system status
Operation: 3 push buttons at the front
Ingress protection: IP 20 / EN 60529
Protection class: I
Ambient temperature: 0 … 40 °C [32 … 104 °F]
Pollution degree: 2
Dimensions: 172 x 110 x 46 mm
110
30
62
172
46

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1 Installation
WARNING! Electric shock!
Opening the housing will expose live parts!
ÎSwitch off power supply and disconnect the device from
power supply before opening the housing!
1.1 Mounting
The unit must only be installed
• in a dry interior location
• in a non-hazardous location
• away from electromagnetic fields
The controller must additionally be supplied from a double-pole switch with con-
tact gap of at least 3 mm. Route sensor cables and power supply cables separately.
ÎUnscrew the cross-head screw from the cover and remove it along with the
cover from the housing
ÎMark the upper fastening point on the wall and drill
ÎFasten the enclosed wall plug and screw leaving the head protruding
ÎHang the housing from the upper fastening point and mark the lower fastening
point through the hole in the terminal box (centers 130 mm)
ÎDrill and insert the lower wall plug
ÎFasten the housing to the wall with lower fastening screw and tighten
ÎComplete wiring connections in accordance with terminal allocations, see
chap. 2.2 “Electrical connection”
ÎPlace the cover back onto the housing
ÎFasten the cover by means of the cross-head screw
display
cable conduits
with strain relief
cover push
button
fuse 2A
130
upper
fastening
lower fastening
1.2 Electrical connection
WARNING! 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
surface such as a radiator or tap!
Note:
The minimum pump speed must be set to 100% when auxiliary relays or
valves are connected.
Note:
The mains connection must be carried out with the common ground
of the building to which the pipework of the solar thermal system is
connected.

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6
1 (1) A 240 V~
1 (1) A 240 V~
R1
R2
LN
R1
N
2019
18
171615
14131212
NR2
IP 20
T2A
100 ... 240 V~
50-60 Hz
Temp. Sensor Pt1000
S2S1 S3 S4 VBus
PWM 1/2
VFD
Made in Germany
DeltaSol®CS Plus
345678910
PE and load terminals
Connecting the device to the mains supply must always be the last step of the
installation!
The power supply to the controller must be carried out via an external power
switch (last step!).The supply voltage must be 100…240V~ (50 … 60 Hz). Flexible
cables must be attached to the housing with the enclosed strain relief and the
corresponding screws.
The controller is equipped with two semiconductor relays, to which loads such as
pumps, valves etc. can be connected:
Relay 1 Relay 2
18 = conductor R1 16 = conductor R2
17 = neutral conductor N 15 = neutral conductor N
13 = protective conductor 14 = protective conductor
The mains supply is to be carried out at the terminals:
19 = neutral conductor N
20 = conductor L
12 = protective conductor ⏚
The temperature sensors (S1 up to S4) are to be connected to the following
terminals with either polarity:
1 / 2 = Sensor 1 (e.g. Sensor collector 1)
3 / 4 = Sensor 2 (e.g. Sensor store 1)
5 / 6 = Sensor 3 (e.g. Sensor store top)
7 / 8 = Sensor 4 (e.g. Sensor return)
All Pt1000 temperature sensors are equipped with a platinum measuring element
in their tip.The electrical resistance of the measuring element changes in relation
to the temperature (see table in chap. 5).
The difference between FKP and FRP type sensors only lies in the cable insu-
lation material.The insulation material of FKP type sensor cables resists a higher
temperature, so that FKP type sensors should be used as collector sensors. FRP
type sensors are best used as reference sensors in stores or pipes.
1 (1) A 240 V~
1 (1) A 240 V~
R1
R2
LN
R1
N
2019
18
17161514131212
NR2
IP 20
T2A
100 ... 240 V~
50-60 Hz
Temp. Sensor Pt1000
S2S1 S3 S4 VBus
PWM 1/2
VFD
Made in Germany
DeltaSol®CS Plus
345678910
Sensor terminals S1 … S4
fuse
VBus®power supply terminals
load terminalssensor terminals PE terminals
1 (1) A 240 V~
1 (1) A 240 V~
R1
R2
LN
R1
N
2019
18
171615
14131212
NR2
IP 20
T2A
100 ... 240 V~
50-60 Hz
Temp. Sensor Pt1000
S2S1 S3 S4 VBus
PWM 1/2
VFD
Made in Germany
DeltaSol®CS Plus
345678910

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7
1.3 VFD Grundfos Direct Sensor™
The controller is equipped with 1 input for a digitalVFD Grundfos Direct Sensor™
for measuring the flow rate and the temperature. Connection is made at the VFD
terminal (bottom left).
1.4 PWM outputs
The speed of a HE pump is adjusted through a PWM signal. In addition to con-
nection to the relay, the pump must be connected to one of the PWM outputs of
the controller.
Power is supplied to the HE pump by switching the corresponding relay on or off.
The terminals marked „PWM 1/2“ are control outputs for pumps with PWM con-
trol input.
1 = PWM output 1, control signal
2 = PWM output 1, GND
3 = PWM output 2, GND
4 = PWM output 2, control signal
1 (1) A 240 V~
1 (1) A 240 V~
R1
R2
LN
R1
N
2019
18
171615
14131212
NR2
IP 20
T2A
100 ... 240 V~
50-60 Hz
Temp. Sensor Pt1000
S2S1 S3 S4 VBus
PWM 1/2
VFD
Made in Germany
DeltaSol®CS Plus
345678910
1.5 Data communication / Bus
1 (1) A 240 V~
1 (1) A 240 V~
R1
R2
LN
R1
N
2019
18
171615
14131212
NR2
IP 20
T2A
100 ... 240 V~
50-60 Hz
Temp. Sensor Pt1000
S2S1 S3 S4 VBus
PWM 1/2
VFD
Made in Germany
DeltaSol®CS Plus
345678910
VBus®
connection terminals
The controller is equipped with a RESOL VBus®for data transfer with and energy
supply to external modules.The connection is carried out at the terminals marked
“VBus” (either polarity). One or more RESOL VBus®modules can be connected
via this data bus, such as
• GA3 Large Display, SD3 Smart Display
• DL3 Datalogger
• DL2 Datalogger
• VBus®/ USB or VBus®/ LAN interface adapter
• AM1 Alarm Module
• WMZ calorimeter module
By means of a Datalogger or an interface adapter, the controller can be connected
to a PC or a computer network. Different solutions for visualisation and remote
parameterisation are availabe on the RESOL website www.resol.com.

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1.6 Terminal allocation in the different system layouts
910
VBus
PWM 1/2
VFD
S1
S2
S4 / VFD / TR
S4 / VFD / TFL
R1 S3 /TSTT
S1
S3
S2
R1 R2
exemplary
Drainback system layout
(with booster pump)
System layout 1
The controller calculates the temperature difference between collector sensor
S1 and store sensor S2. If the difference is larger than or identical to the adjusted
switch-on temperature difference (DT O), the solar pump will be operated by
relay 1, and the store will be loaded until the switch-off temperature difference
(DT F) or the maximum store temperature (S MX) is reached.
Sensors S3 and S4 can optionally be connected for measurement purposes. S3 can
optionally be used as reference sensor for the store emergency shutdown option
(OSEM).
If heat quantity measurement (OHQM) is activated, S4 andVFD are to be connect-
ed as flow and return sensors respectively.
If the drainback option (ODB) is activated, relay 2 can be used to operate a boost-
er pump by activating the booster function (OBST).

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Display Channels
Channel Description Terminal Page
INIT x* ODB initialisation active - 51
FLL x* ODB filling time active - 51
STAB x* ODB stabilisation in progress - 51
COL x Temperature collector S1 51
TST x Temperature store S2 51
S3 x Temperature sensor 3 S3 51
TSTT x* Temperatur store at the top S3 51
S4 x Temperature sensor 4 S4 51
TFL x* Temperature flow sensor S1 / S4 /VFD 51
TR x* Temperature return sensor S4 /VFD 51
VFD x* Temperature Grundfos Direct Sensor™ VFD 51
L/h x* Flow rate Grundfos Direct Sensor™ VFD 52
n % x Pump speed R1 R1 52
hP x Operating hours R1 R1 54
hP1 x* Operating hours R1 (if OBST is activated) R1 54
hP2 x* Operating hours R2 (if OBST is activated) R2 54
kWh x* Heat quantity kWh - 52
MWh x* Heat quantity MWh - 52
TIME x Time - 52
Adjustment Channels
Channel Description Factory setting Page
Arr x System 1 54
DT O x Switch-on temperature difference R1 6.0 K [12.0 °Ra] 54
DT F x Switch-off temperature difference R1 4.0 K [8.0 °Ra] 54
DT S x Nominal temperature difference R1 10.0 K [20.0 °Ra] 54
PUM1 x Pump control type R1 PSOL 55
RIS x Rise control R1 2 K [4 °Ra] 55
nMX x Maximum pump speed R1 100 % 55
nMN x Minimum pump speed R1 30 % 55
S MX x Maximum store temperature 60 °C [140 °F] 56
OSEM x Option store emergency shutdown OFF 56
EM x Emergency temperature collector 130 °C [270 °F] 56
Emergency temperature collector if ODB is activated: 95 °C [200 °F] 56
OCC x Option collector cooling OFF 57
CMX x* Maximum collector temperature 110 °C [230 °F] 57
OSYC x Option system cooling OFF 57

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Adjustment Channels
Channel Description Factory setting Page
DTCO x* Cooling switch-on temperature difference 20.0 K [40.0 °Ra] 57
DTCF x* Cooling switch-off temperature difference 15.0 K [30.0 °Ra] 57
OSTC x Option store cooling OFF 57
OHOL x* Option holiday cooling OFF 57
THOL x* Holiday cooling temperature 40 °C [110 °F] 59
OCN x Option minimum limitation OFF 59
CMN x* Minimum collector temperature 10 °C [50 °F] 59
OCF x Option antifreeze OFF 59
CFR x* Antifreeze temperature 4.0 °C [40.0 °F] 59
O TC x Option tube collector OFF 61
TCST x* OTC starting time 07:00 61
TCEN x* OTC ending time 19:00 61
TCRU x* OTC runtime 30 s 61
TCIN x* OTC standstill interval 30 min 61
GFD x Grundfos Direct Sensor™ OFF 61
OHQM x Option heat quantity measurement OFF 63
SEN x* VFD allocation 2 63
FMAX x* Maximum flow 6.0 l/min 63
MEDT x* Antifreeze type 1 63
MED% x* Antifreeze concentration (only if MEDT = propylene or ethylene) 45 % 63
ODB x Drainback option OFF 64
tDTO x* ODB switch-on condition - time period 60 s 64
tFLL x* ODB filling time 5.0 min 64
tSTB x* ODB stabilisation time 2.0 min 64
OBST s* Option booster function OFF 64
MAN1 x Manual operation R1 Auto 64
MAN2 x Manual operation R2 Auto 64
LANG x Language En 64
UNIT x Temperature unit °C 64
RESE x Reset - back to factory settings 64
######## Version number
Legend:
Symbol Specification
x Channel is available
x* Channel is available if the corresponding option is activated.
s Channel is specifically available in this system layout
s* System-specific channel, only available if the corresponding option is activated

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System layout 2
The controller calculates the temperature difference between collector sensor
S1 and store sensor S2. If the difference is larger than or identical to the adjusted
switch-on temperature difference (DT O),the solar pump will be operated by relay
1, and the store will be loaded until the switch-off temperature difference (DT F)
or the maximum store temperature (S MX) is reached.
Heat exchange from store 1 to store 2 will be operated by relay 2, if the tem-
perature difference between sensors S3 and S4 is larger than or identical to the
adjusted switch-on temperature difference (DT3O), until the adjusted minimum
(MN3O) and maximum (MX3O) temperature thresholds of the respective stores
are reached. S3 can optionally be used as reference sensor for the store emergency
shutdown option (OSEM).
If heat quantity measurement (OHQM) is activated, S1andVFD are to be connect-
ed as flow and return sensors respectively.
910
VBus
PWM 1/2
VFD
R2
S1
S3 / TSTT
S4
R1
VFD / TR
S2
Store 1 Store 2

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Display Channels
Channel Description Terminal Page
INIT x* ODB initialisation active - 51
FLL x* ODB filling time active - 51
STAB x* ODB stabilisation in progress - 51
COL x Temperature collector S1 51
TST1 x Temperature store 1 base S2 51
TSTT x Temperature store 1 at the top S3 51
TST2 x Temperature store 2 base S4 51
TFL x* Temperature flow sensor S1 51
TR x* Temperature return sensor VFD 51
VFD x* Temperature Grundfos Direct Sensor™ VFD 51
L/h x* Flow rate Grundfos Direct Sensor™ VFD 52
n1 % x Pump speed R1 R1 52
n2 % x Pump speed R2 R2 52
h P1 x Operating hours R1 R1 54
h P2 x Operating hours R2 R2 54
kWh x* Heat quantity kWh - 52
MWh x* Heat quantity MWh - 52
TIME x Time - 52
Adjustment Channels
Channel Description Factory setting Page
Arr x System 2 54
DT O x Switch-on temperature difference R1 6.0 K [12.0 °Ra] 54
DT F x Switch-off temperature difference R1 4.0 K [8.0 °Ra] 54
DT S x Nominal temperature difference R1 10.0 K [20.0 °Ra] 54
RIS x Rise control R1 2 K [4 °Ra] 55
PUM1 x Pump control type R1 PSOL 55
n1MN x Minimum pump speed R1 30 % 55
n1MX x Maximum pump speed R1 100 % 55
S MX x Maximum store temperature 60 °C [140 °F] 56
OSEM xOption store emergency shutdown OFF 56
PUM2 x Pump control type R2 OnOF 55
n2MN x* Minimum pump speed R2 30 % 55
n2MX x* Maximum pump speed R2 100 % 55
EM x Emergency temperature collector 130 °C [270 °F] 56
Emergency temperature collector if ODB is activated: 95 °C [200 °F] 56
OCC x Option collector cooling OFF 57
CMX x* Maximum collector temperature 110 °C [230 °F] 57
OSYC x Option system cooling OFF 57
DTCO x* Cooling switch-on temperature difference 20.0 K [40.0 °Ra] 57
DTCF x* Cooling switch-off temperature difference 15.0 K [30.0 °Ra] 57

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Adjustment Channels
Channel Description Factory setting Page
OSTC x Option store cooling OFF 57
OHOL x* Option holiday cooling OFF 57
THOL x* Holiday cooling temperature 40 °C [110 °F] 59
OCN x Option minimum limitation OFF 59
CMN x* Minimum collector temperature 10 °C [50 °F] 59
OCF x Option antifreeze OFF 59
CFR x* Antifreeze temperature 4.0 °C [40.0 °F] 59
O TC x Option tube collector OFF 61
TCST x* OTC starting time 07:00 61
TCEN x* OTC ending time 19:00 61
TCRU x* OTC runtime 30 s 61
TCIN x* OTC standstill interval 30 min 61
GFD x Grundfos Direct Sensor™ OFF 61
OHQM x Option heat quantity measurement OFF 63
MEDT x* Antifreeze type 1 63
MED% x* Antifreeze concentration (only if MEDT = propylene or ethylene) 45 % 63
DT3O s Switch-on temperature difference R2 6.0 K [12.0 °Ra] 54
DT3F s Switch-off temperature difference R2 4.0 K [8.0 °Ra] 54
DT3S s Nominal temperature difference R2 10.0 K [20.0 °Ra] 54
RIS3 s Rise control R2 2 K [4 °Ra] 55
MX3O s Switch-on treshold for maximum temperature 60.0 °C [140.0 °F] 39
MX3F s Switch-off treshold for maximum temperature 58.0 °C [136.0 °F] 39
MN3O s Switch-on treshold for minimum temperature 5.0 °C [40.0 °F] 39
MN3F s Switch-off treshold for minimum temperature 10.0 °C [50.0 °F] 39
ODB x Drainback option OFF 64
tDTO x* ODB switch-on condition - time period 60 s 64
tFLL x* ODB filling time 5.0 min 64
tSTB x* ODB stabilisation time 2.0 min 64
MAN1 x Manual operation R1 Auto 64
MAN2 x Manual operation R2 Auto 64
LANG x Language En 64
UNIT x Temperature unit °C 64
RESE x Reset - back to factory settings 64
######## Version number
Legend:
Symbol Specification
x Channel is available
x* Channel is available if the corresponding option is activated.
s Channel is specifically available in this system layout
s* System-specific channel, only available if the corresponding option is activated

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14
System-specific functions
The following adjustments are used for the specific function in system layout 2.
∆T control for the heat exchange between 2 stores
DT3O:
Switch-on temperature diff.
Adjustment range: 1.0 … 20.0 K [2.0 … 40.0 °Ra]
in steps of 0.5 K [1 °Ra]
Factory setting: 6.0 K [12.0 °Ra]
DT3F:
Switch-off temperature diff.
Adjustment range: 0.5 … 19.5 K [1.0 … 39.0 °Ra]
in steps of 0.5 K [1 °Ra]
Factory setting: 4.0 K [8.0 °Ra]
Reference sensors for this function are S3 and S4.
In system layout 2 the controller is equipped with an additional differential control
for heat exchange between two stores.The basic differential function is adjusted
using the switch-on (DT3O) and switch-off (DT3F) temperature differences.
When the temperature difference exceeds the switch-on temperature difference,
relay 2 switches on. If the temperature difference then falls below the adjusted
switch-off temperature difference, relay 2 switches off.
Note:
The switch-on temperature difference must be at least 0.5 K [1°Ra] high-
er than the switch-off temperature difference.
Pump speed control
DT3S:
Nominal temperature difference
Adjustment range: 1.5 … 30.0 K [3.0 … 60.0 °Ra]
in steps of 0.5 K [1 °Ra]
Factory setting: 10.0 K [20.0 °Ra]
Note:
For pump speed control of the heat exchange pump, the operation mode
of relay 2 (MAN2) must be set to Auto.
RIS3:
Rise
Adjustment range: 1 … 20 K[2 … 40 °Ra]
in steps of 1 K [2 °Ra]
Factory setting: 2 K [4 °Ra]
When the switch-on temperature difference is reached, the pump is activated at
full speed for 10 seconds.Then, the speed is reduced to the minimum pump speed
value (n2MN).
If the temperature difference reaches the adjusted nominal temperature difference
(DT3S), the pump speed increases by one step (10%). If the difference increases
by the adjustable rise value, the pump speed increases by 10 % respectively until
the maximum pump speed of 100% is reached.The response of the controller can
be adapted via the parameter RIS3.
Note:
The nominal temperature difference must be at least 0.5 K [1 °Ra] higher
than the switch-on temperature difference.

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PUM2
Pump control type R2
Selection: OnOF, PULS, PSOL, PHEA
Factory setting: OnOF
With this parameter, the pump control type can be adjusted.
The following types can be selected:
Adjustment for standard pump without speed control
• OnOF (pump on / pump off)
Adjustment for standard pump with speed control
• PULS (pulse packet control via semiconductor relay)
Adjustment for high-efficiency pump (HE pump)
• PSOL (PWM profile for a high-efficiency solar pump)
• PHEA (PWM profile for a high-efficiency heating pump)
In order to reduce the number of switching processes for high-efficiency pumps,
the controller is equipped with a relay overrun function that automatically comes
into effect when the speed control signal is not issued by the relay itself (PUM =
PSOL or PHEA).The corresponding relay will then remain switched on for an hour
after the switch-off conditions are fulfilled.
WARNING! Electric shock!
During the overrun time, the relay symbol disappears from the
display and the pump is inactive, but the relay is still energised!
ÎSwitch off power supply and disconnect the device
from power supply before working on the device or
the cables connected!
Minimum pump speed
n2MN
Pump speed control
Adjustment range: (10) 30 … 100 %
in steps of 5 %
Factory setting: 30 %
A relative minimum pump speed can be allocated to the output R2 via the adjust-
ment channel n2MN.
Note:
When loads which are not speed-controlled (e. g. valves) are used, the
value of the corresponding relay (n1, n2) must be set to 100% or the
pump control type must be set to OnOF in order to deactivate pump
speed control.
n2MX
Maximum pump speed R2
Adjustment range: (10) 30 … 100 %
in steps of: 5 %
Factory setting: 100 %
A relative maximum pump speed can be allocated to the output R2 via the adjust-
ment channel n2MX.
Note:
When loads which are not speed-controlled (e. g. valves) are used,the value
of the corresponding relay (n1, n2) must be set to 100% or the pump con-
trol type must be set to OnOF in order to deactivate pump speed control.

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16
Maximum temperature limitation
MX3O / MX3F:
Maximum temperature limitation
Adjustment range: 0.0 … 95.0 °C [30.0 … 200.0 °F]
in steps of 0.5 °C [1.0 °F]
Factory setting:
MX3O: 60.0 °C [140.0 °F]
MX3F: 58.0 °C [136.0 °F]
Minimum and maximum temperature limits can be set for the heat exchange func-
tion.
The maximum temperature limitation uses sensor 4 as reference sen-
sor.
The maximum temperature limitation function provides a maximum temperature
setting, usually to reduce scald risk in a storage store.If MX3O is exceeded, relay 2
is switched off until the temperature at sensor 4 falls below MX3F.
Minimum temperature limitation
MN3O / MN3F:
Minimum temperature limitation
Adjustment range: 0.0 … 90.0 °C [30.0 … 190.0 °F]
in steps of 0.5 °C [1.0 °F]
Factory setting (Arr = 2 only):
MN3O: 5.0 °C [40.0 °F]
MN3F: 10.0 °C [50.0 °F]
The minimum temperature limitation uses sensor 3 as reference sensor.
The minimum temperature limitation function provides a minimum temperature
setting for the heat source in system layout 2. If the temperature at sensor 3 falls
below MN3O, relay 2 is switched off until the temperature at sensor 3 exceeds
MN3F.
Both switch-on and switch-off temperature differences DT3O and DT3F are
valid for the maximum and minimum temperature limitation.

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17
System layout 3
The controller calculates the temperature difference between collector sensor
S1 and store sensor S2. If the difference is larger than or identical to the adjusted
switch-on temperature difference (DT O),the solar pump will be operated by relay
1, and the store will be loaded until the switch-off temperature difference (DT F)
or the maximum store temperature (S MX) is reached.
Sensor S3 is used for a thermostatic function, which operates relay 2 for afterheat-
ing or heat dump purposes, when the adjusted thermostat switch-on temperature
(AH O) is reached. This function can optionally be combined with up to three
adjustable time frames.
Sensor S3 can also be optionally used as a reference sensor for the thermal disin-
fection function OTD or the store emergency shutdown option (OSEM).
Sensor S4 can optionally be connected for measurement purposes. If heat quantity
measurement (OHQM) is activated, S4 and VFD are to be connected as flow and
return sensors respectively.
VBus
910
PWM 1/2
VFD
R2
S1
S2
R1
S3 / TSTT
S4 / VFD / TR
S4 / VFD / TFL

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Display Channels
Channel Description Terminal Page
INIT x* ODB initialisation active - 51
FLL x* ODB filling time active - 51
STAB x* ODB stabilisation in progress - 51
COL x Temperature collector S1 51
TSTB x Temperature store 1 base S2 51
TSTT x Temperature store 1 at the top S3 51
TDIS s* Thermal disinfection temperature S3 51
S4 x Temperature sensor 4 S4 51
TFL x* Temperature flow sensor S1 / S4 /VFD 51
TR x* Temperature return sensor S4 /VFD 51
VFD x* Temperature Grundfos Direct Sensor™ VFD 51
L/h x* Flow rate Grundfos Direct Sensor™ VFD 52
n1 % x Pump speed R1 R1 52
h P1 x Operating hours R1 R1 54
h P2 x Operating hours R2 R2 54
kWh x* Heat quantity kWh - 52
MWh x* Heat quantity MWh - 52
CDIS s* Countdown of monitoring period - 53
SDIS s* Starting time display - 53
DDIS s* Heating period display - 53
TIME x Time - 53
Adjustment Channels
Channel Description Factory setting Page
Arr x System 3 54
DT O x Switch-on temperature difference R1 6.0 K [12.0 °Ra]54
DT F x Switch-off temperature difference R1 4.0 K [8.0 °Ra]54
DT S x Nominal temperature difference R1 10.0 K [20.0 °Ra]54
RIS x Rise control R1 2 K [4 °Ra] 55
PUM1 x Pump control type R1 PSOL 55
n1MX x Maximum pump speed R1 100 % 55
n1MN x Minimum pump speed R1 30 % 55
S MX x Maximum store temperature 60 °C [140 °F]56
OSEM xOption store emergency shutdown OFF 56
EM x Emergency temperature collector 130 °C [270 °F]56
Emergency temperature collector if ODB is activated: 95 °C [200 °F]56
OCC x Option collector cooling OFF 57
CMX x* Maximum collector temperature 110 °C [230 °F]57
OSYC x Option system cooling OFF 57
DTCO x* Cooling switch-on temperature difference 20.0 K [40.0 °Ra]57
DTCF x* Cooling switch-off temperature difference 15.0 K [30.0 °Ra]57
OSTC x Option store cooling OFF 57
OHOL x* Option holiday cooling OFF 57
THOL x* Holiday cooling temperature 40 °C [110 °F]59
OCN x Option minimum limitation OFF 59

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Adjustment Channels
Channel Description Factory setting Page
CMN x* Minimum collector temperature 10 °C [50 °F]59
OCF x Option antifreeze OFF 59
CFR x* Antifreeze temperature 4.0 °C [40.0 °F]59
O TC x Option tube collector OFF 61
TCST x* OTC starting time 07:00 61
TCEN x* OTC ending time 19:00 61
TCRU x* OTC runtime 30 s 61
TCIN x* OTC standstill interval 30 min 61
GFD x Grundfos Direct Sensor™ OFF 61
OHQM x Option heat quantity measurement OFF 63
SEN x* VFD allocation 2 63
FMAX x* Maximum flow 6.0 l/min 63
MEDT x* Antifreeze type 1 63
MED% x* Antifreeze concentration 45 % 63
AH O s Switch-on temp. for thermostat 40 °C [110 °F]20
AH F s Switch-off temp. for thermostat 45 °C [120 °F]20
t1 O s Switch-on time 1 thermostat 00:00 20
t1 F s Switch-off time 1 thermostat 00:00 20
t2 O s Switch-on time 2 thermostat 00:00 20
t2 F s Switch-off time 2 thermostat 00:00 20
t3 O s Switch-on time 3 thermostat 00:00 20
t3 F s Switch-off time 3 thermostat 00:00 20
ODB x Drainback option OFF 64
tDTO x* ODB switch-on condition - time period 60 s 64
tFLL x* ODB filling time 5.0 min 64
tSTB x* ODB stabilisation time 2.0 min 64
OTD s Option thermal disinfection OFF 20
PDIS s* Monitoring period 01:00 20
DDIS s* Heating period 01:00 20
TDIS s* Disinfection temperature 60 °C [140 °F]21
SDIS s* Starting time 00:00 21
MAN1 x Manual operation R1 Auto 64
MAN2 x Manual operation R2 Auto 64
LANG x Language En 64
UNIT x Temperature unit °C 64
RESE x Reset - back to factory settings 64
######## Version number
Legend:
Symbol Specification
x Channel is available
x* Channel is available if the corresponding option is activated.
s Channel is specifically available in this system layout
s* System-specific channel, only available if the corresponding option is activated

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System-specific functions
The following functions are exclusively available in system layout 3. The corre-
sponding channels will not be available in any other system layout.
Thermostat function
Afterheating
Use of surplus
energy
The thermostat function works independently from the solar operation and can be
used for using surplus energy or for afterheating.
• AH O < AH F
thermostat function for afterheating
• AH O > AH F
thermostat function for using surplus energy
The symbol will be shown on the display if the second relay output is activated.
Reference sensor for the thermostat function is S3!
AH O:
Thermostat switch-on temp.
Adjustment range: 0.0 … 95.0 °C [30.0 … 200.0 °F]
in steps of 0.5 °C [1.0 °F]
Factory setting: 40.0 °C [110.0°F]
AH F:
Thermostat switch-off temp.
Adjustment range: 0.0 … 95.0 °C [30.0 … 200.0 °F]
in steps of 0.5 °C [1.0 °F]
Factory setting: 45.0 °C [120.0 °F]
t1 O, t2 O, t3 O:
Thermostat switch-on time
Adjustment range: 00:00 … 23:45
Factory setting: 00:00
t1 F, t2 F, t3 F:
Thermostat switch-off time
Adjustment range: 00:00 … 23:45
Factory setting: 00:00
In order to block the thermostat function for a certain period, there are three time
frames t1 … t3. If the function should be active between 6:00 and 9:00, set t1 O
to 6:00 and t1 F to 9:00.
If all time frames are set to 00:00 o’clock, the thermostat function is continuously
activated (factory setting).