Resol DeltaSol BS/3 User guide

D e lt a S o l® BS/3
www.resol.com
Manual
en-US/CA
RESOL D e lt a S o l® BS/3
Mounting
Connection
Application examples
Operation
Troubleshooting
Thank you for buying this RESOL product.
Read this manual carefully to get the best perfomance from this unit.
Please keep this manual carefully.
*48005410* 48005410

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Safety advice:
Please read the following information carefully before
installing and operating the controller. In this way damage
to the solar system caused by wrong installation will be
avoided. Please make sure that the mounting is adapted to
the characteristics of the building, that the local regulations
are respected and is conform with the technical rules.
Description of symbols
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.
Information about the product
Proper usage
The solar controller is designed for use in solar thermal
and heating systems in compliance with the technical data
specified in these instructions.
Improper use excludes all liability claims.
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 electro-
magnetic fields.
WARNING! Warnings are indicated with a
warning triangle!
They contain information on how
to avoid the danger described.
Note
Notes are indicated with an information
symbol.
Subject to technical change. Errors excepted.
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
Canadian Electrical Code (CEC), Part I.
These instructions are exclusively addressed to authorized
skilled personnel.
•Only qualified electricians should carry out installation
and maintenance work.
•Initial installation should be carried out by qualified per-
sonnel
ÎArrows indicate instruction steps that should be
carried out.
General
Contents
General ..................................................................... 2
Overview ................................................................... 3
1. Installation ........................................................... 4
1.1 Mounting ................................................................................4
1.2 Electrical connection ...........................................................4
1.3 Data communication/ Bus .................................................5
1.4 Terminal allocation in the different system layouts ....6
System layout 1 .....................................................................6
System layout 2 .....................................................................8
System-specific functions ................................................ 10
System layout 3 ...................................................................12
2. Operation and function ................................... 14
2.1 Push buttons........................................................................14
2.2 System monitoring display ...............................................14
2.3 Flashing codes .....................................................................15
3. Commissioning ................................................. 16
4. Channel overview ............................................. 18
4.1 Display channels .................................................................18
4.2 Adjustment channels ........................................................ 20
5. Troubleshooting................................................ 27
5.1 Various: ................................................................................ 28
6. Accessories ........................................................ 30
Impressum .............................................................. 32

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• System-monitoring-display
• Up to 4 Pt1000 temperature sensors
• 3 basic system layouts to choose from
• Energy metering
• 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
2.6"
66 mm
4.3"
110 mm
6.8"
172 mm
1.1"
28 mm
0.4" / 11 mm
1.9" / 47 mm
0.5" / 13 mm
6.1"
155 mm
Included with the BS/3:
1 × D e l t a S o l® BS/3
1 × accessory bag
1 × spare fuse T4A
2 × screws and wall plugs
4 × strain relief and screws
1 × manual
Additionally enclosed in the full kit:
1 × sensor FKP6
2 × sensor FRP6
Technical data
Housing: plastic, PC-ABS and PMMA
Protection type: IP 20 / EN 60529
Ambient temp.:
32 ... 104 °F
[0 ... 40 °C]
Size:
6.8" × 4.3" × 1.9"
172 × 110 × 47 mm
Mounting: wall mounting, mounting
into patch-panels is possible
Display: System screen for system
visualization, 16-segment display, 7-seg-
ment display, 8 symbols for system
status and operating control lamp
Operation: by 3 push buttons at the
front of the housing
Functions: Differential temperature
controller with optional add-on system
functions. Func ti on con trol, operating
hours counter for solar pump, evacua-
ted tube collector function, thermostat
function, drainback and booster option,
and energy metering.
Inputs:
for 4 Pt1000 temperature sensors
Outputs: 2 semiconductor relays
Bus: VBus®
Power supply:
100 ... 240 V~
Standby power consumption:
< 1 W
Switching capacities:
R1: 1 (1) A 100 ... 240 V~
(semiconductor relay)
R2: 1 (1) A 100 ... 240 V~
(semiconductor relay)
Overview

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display
push button
fuse 4A
cable conduits with strain
relief
cover
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 contact gap of at least 0.12" [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 5.1" [130 mm])
ÎDrill and insert the lower wall plug
ÎFasten the housing to the wall with lower fastening
screw and tighten
Î Complete wiring connections in accordance with
terminal allocations, see chap. 1.2 “Electrical connec-
tion”
ÎPlace the cover back onto the housing
ÎFasten the cover by means of the cross-head screw
1. Installation
104 mm
4.1“
130 mm
5.1“
upper fastening
lower fastening
VBus®
1.2 Electrical connection
power supply terminals
fuse
load terminalssensor terminal ground terminal
WARNING! Electric shock!
Opening the housing will expose
live parts!
ÎSwitch off power supply and discon-
nect the device from power supply
before opening the housing!
ATTENTION! ESD damage!
Electrostatic discharge can lead to da-
mage to electronic components!
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!
Connecting the device to the power 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 ... 240 V~ (50 ... 60 Hz). Flexible cables must
be attached to the housing with the enclosed strain relief
and the corresponding screws.

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1.3 Data communication/ Bus 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
•DL2 datalogger
•VBus®/USB or VBus®/LAN interface adapter
•VBus®/PWM interface adapter
•AM1 alarm module
•WMZ calorimeter module
By means of a DL2 datalogger or an interface adapter, the
controller can be connected to a PC or a computer net-
work. With the RESOL ServiceCenter Software (RSC) the
controller measurements can be read out, processed and
visualized. The software allows easy function control of the
system. For the remote parametrisation of the controller, a
special software tool will be available for download, soon.
VBus®
connection terminals
The controller is equipped with 2 semiconductor relays,
to which loads such as pumps, valves etc. can be con-
nected:
•Relay 1
18 = conductor R1
17 = neutral conductor N
13 = ground conductor
•Relay 2
16 = conductor R2
15 = neutral conductor N
14 = ground conductor
The power supply is to be carried out at the terminals:
19 = neutral conductor N
20 = conductor L
12 = ground terminal
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)
3 / 4 = Sensor 2 (e.g. Sensor tank)
5 / 6 = Sensor 3 (e.g. Sensor tank 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 insulation 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
tanks or pipes.
LNR1NR2N
201918171615141312
1 (1) A (
1
100 ... 240) V~
(1) A (100 ... 240) V~
R1
R2
1 2
S1 S2 S3
3456
Temp. Sensor
Pt1000
S4
7 8
Sensor terminals S1 ... S4
Grounding and load terminals

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S1
S2
S4 / TR
System layout 1
The controller calculates the temperature difference bet-
ween collector sensor S1 and tank sensor S2. If the diffe-
rence 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 tank will be loaded until the
switch-off temperature difference (DT F) or the maximum
tank temperature (S MX) is reached.
R1
Arr 1
S3
1.4 Terminal allocation in the different system layouts
Display Channels
Channel Description Terminal Page
INIT x* ODB initialization active - 19
FLL x* ODB filling time active - 19
STAB x* ODB stabilization in progress - 19
COL x Temperature collector S1 18
TST x Temperature tank S2 18
S3 x Temperature sensor 3 S3 18
S4 x Temperature sensor 4 S4 18
TR x* Temperature return sensor S4 18
hP x Operating hours R1 R1 19
hP1 x* Operating hours R1 (if OBST is activated) R1 19
hP2 x* Operating hours R2 (if OBST is activated) R2 19
kWh x* Heat quantity kWh - 19
MWh x* Heat quantity MWh - 19
TIME x Time - 16
Sensors S3 and S4 can optionally be connected for mea-
surement purposes.
If energy metering (OHQM) is activated, sensor S4 has to
be connected as return sensor.
If the drainback option (ODB) is activated, relay 2 can be
used to operate a booster pump by activating the booster
function (OBST).
S1
S3
S2
S4/TR
R1 R2
exemplary
Drainback system layout
(with booster pump)

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Legend:
Symbol Specification
x Channel is available
x* Channel is available if the corresponding option is activated.
s* System-specific channel, only available if the corresponding option is activated
Adjustment Channels
Channel Description Factory setting Page
Arr x System 1 20
DT O x Switch-on temperature difference 12.0 °Ra [6.0 K] 20
DT F x Switch-off temperature difference 8.0 °Ra [4.0 K] 20
S MX x Maximum tank temperature 140 °F [60 °C] 21
EM x Emergency temperature collector 270 °F [130 °C] 21
Emergency temperature collector if ODB is activated: 200 °F [95 °C] 21
OCC x Option collector cooling OFF 22
CMX x* Maximum collector temperature 230 °F [110 °C] 22
OSYC x Option system cooling OFF 22
DTCO x* Cooling switch-on temperature difference 40.0 °Ra [20.0 K] 22
DTCF x* Cooling switch-off temperature difference 30.0 °Ra [15.0 K] 22
OSTC x Option tank cooling OFF 23
OHOL x* Option holiday cooling OFF 23
THOL x* Holiday cooling temperature 110 °F [40 °C] 23
OCN x Option minimum limitation OFF 23
CMN x* Minimum collector temperature 50 °F [10 °C] 23
OCF x Option antifreeze OFF 23
CFR x* Antifreeze temperature 40.0 °F [4.0 °C] 23
O TC x Option tube collector OFF 24
TCST x* OTC starting time 07:00 24
TCEN x* OTC ending time 19:00 24
TCRU x* OTC runtime 30 s 24
TCIN x* OTC standstill interval 30 min 24
OHQM x Option energy metering OFF 24
FMAX x* Maximum flow 6.0 l 24
MEDT x* Antifreeze type 1 24
MED% x* Antifreeze concentration (only if MEDT = propylene or ethylene) 45 % 24
ODB x Drainback option OFF 25
tDTO x* ODB switch-on condition - time period 60 s 25
tFLL x* ODB filling time 5.0 min 25
tSTB x* ODB stabilization time 2.0 min 25
OBST s* Option booster function OFF 25
MAN1 x Manual operation R1 Auto 26
MAN2 x Manual operation R2 Auto 26
LANG x Language En 26
UNIT x Temperature unit °C 26
RESE x Reset - back to factory defaults 26
W0030100 Version number

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R2
S1
S2
R1
S3
S4 / TR
System layout 2
The controller calculates the temperature difference bet-
ween collector sensor S1 and tank sensor S2. If the diffe-
rence 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 tank will be loaded until the
switch-off temperature difference (DT F) or the maximum
tank temperature (S MX) is reached.
Sensor S3 is used for a thermostatic function, which ope-
rates relay 2 for backup heating or heat dump purposes,
Arr 2
Display Channels
Channel Description Terminal Page
INIT x* ODB initialization active - 19
FLL x* ODB filling time active - 19
COL x Temperature collector S1 18
TSTB x Temperature tank 1 bottom S2 18
TSTT x Temperature tank 1 at the top S3 18
TDIS s* Thermal disinfection temperature S3 18
S4 x Temperature sensor 4 S4 18
TR x* Temperature return sensor S4 18
h P1 x Operating hours R1 R1 19
h P2 x Operating hours R2 R2 19
kWh x* Heat quantity kWh - 19
MWh x* Heat quantity MWh - 19
CDIS s* Countdown of monitoring period - 19
SDIS s* Starting time display - 19
DDIS s* Heating period display - 19
TIME x Time - 16
when the adjusted thermostat switch-on temperature
(AH O) is reached. This function can optionally be com-
bined with up to three adjustable time frames.
Sensor S3 can also be optionally used as a reference sensor
for the thermal disinfection function OTD.
Sensor S4 can optionally be connected for measurement
purposes. If energy metering (OHQM) is activated, sensor
S4 has to be connected as return sensor.

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Adjustment Channels
Channel Description Factory setting Page
Arr x System 2 20
DT O x Switch-on temperature difference 12.0 °Ra [6.0 K] 20
DT F x Switch-off temperature difference 8.0 °Ra [4.0 K] 20
S MX x Maximum tank temperature 140 °F [60 °C] 21
EM x Emergency temperature collector 270 °F [130 °C] 21
Emergency temperature collector if ODB is activated: 200 °F [95 °C] 21
OCC x Option collector cooling OFF 22
CMX x* Maximum collector temperature 230 °F [110 °C] 22
OSYC x Option system cooling OFF 22
DTCO x* Cooling switch-on temperature difference 40.0 °Ra [20.0 K] 22
DTCF x* Cooling switch-off temperature difference 30.0 °Ra [15.0 K] 22
OSTC x Option tank cooling OFF 23
OHOL x* Option holiday cooling OFF 23
THOL x* Holiday cooling temperature 110 °F [40 °C] 23
OCN x Option minimum limitation OFF 23
CMN x* Minimum collector temperature 50 °F [10 °C] 23
OCF x Option antifreeze OFF 23
CFR x* Antifreeze temperature 40.0 °F [4.0 °C] 23
O TC x Option tube collector OFF 24
TCST x* OTC starting time 07:00 24
TCEN x* OTC ending time 19:00 24
TCRU x* OTC runtime 30 s 24
TCIN x* OTC standstill interval 30 min 24
OHQM x Option energy metering OFF 24
FMAX x* Maximum flow 6.0 l 24
MEDT x* Antifreeze type 1 24
MED% x* Antifreeze concentration 45 % 24
AH O s Switch-on temp. for thermostat 1 110 °F [40 °C] 10
AH F s Switch-off temp. for thermostat 1 120 °F [45 °C] 10
t1 O s Switch-on time 1 thermostat 00:00 10
t1 F s Switch-off time 1 thermostat 00:00 10
t2 O s Switch-on time 2 thermostat 00:00 10
t2 F s Switch-off time 2 thermostat 00:00 10
t3 O s Switch-on time 3 thermostat 00:00 10
t3 F s Switch-off time 3 thermostat 00:00 10
ODB x Drainback option OFF 25
tDTO x* ODB switch-on condition - time period 60 s 25
tFLL x* ODB filling time 5.0 min 25
OTD s Option thermal disinfection OFF 11
PDIS s* Monitoring period 01:00 11
DDIS s* Heating period 01:00 11
TDIS s* Disinfection temperature 140 °F [60 °C] 11
SDIS s* Starting time 00:00 11
MAN1 x Manual operation R1 Auto 26
MAN2 x Manual operation R2 Auto 26
LANG x Language En 26
UNIT x Temperature unit °C 26
RESE x Reset - back to factory defaults 26
W0030100 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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The thermostat function works independently from the
solar operation and can be used for using surplus energy
or for backup heating.
• AH O < AH F
thermostat function for backup heating
• 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.
Thermostat function
Backup heating
AH O:
Thermostat switch-on tem p.
Adjustment range:
30.0 ... 200.0 °F
[0.0 ... 95.0 °C]
in steps of 1.0 °Ra [0.5 K]
Factory setting:
110.0°F [40.0 °C]
AH F:
Thermostat switch-off tem p.
Adjustment range:
30.0 ... 200.0 °F
[0.0 ... 95.0 °C]
in steps of 1.0 °Ra [0.5 K]
Factory setting:
120.0 °F [45.0 °C]
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).
Use of surplus energy
Reference sensor for the thermostat function is S3!
System-specific functions The following functions are exclusively available in system
layout 2. The corresponding channels will not be available in
any other system layout.

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When a starting time for thermal disinfection with starting
delay is adjusted in SDIS, the thermal disinfection will be
delayed until that time, even after the CDIS has counted
down to 00:00. If CDIS ends, for example, at 12:00 o‘clock,
and SDIS has been set to 18:30, relay 2 will be operated
with a delay of 6.5 hours at 18:30 instead of 12:00.
During the waiting time, SDIS is displayed with the adjusted
starting time (flashing).
If, during the waiting time, the temperature at S3 exceeds
TDIS for the adjusted heating period DDIS, thermal
disinfection is considered complete and a new monitoring
period begins.
If the starting time is adjusted to 00:00 (factory setting), the
delay function is inactive.
Upon delivery, OTD is deactivated. The adjustment values
PDIS, TDIS, DDIS and SDIS are displayed after the
option has been activated. After the thermal disinfection
function has been completed, the values will be “hidden”
and the monitoring period will be displayed.
SDIS
Starting time
Adjustment range:
00:00 ... 24:00 (o‘clock)
Factory setting: 00:00
Thermal disinfection with starting delay
Option: Thermal disinfection of the upper DHW
zone (OTD)
TDIS
Disinfection temperature
Adjustment range:
30 ... 200 °F
[0 ... 95 °C]
in steps of 2 °Ra [1 K]
Factory setting:
140 °F [60 °C]
DDIS
Heating period
Adjustment range:
00:00 ... 23:59 (hh:mm)
Factory setting: 01:00
For thermal disinfection, the temperature in the upper
DHW tank zone has to be monitored. This protection is
ensured when, during the monitoring period (PDIS), the
disinfection temperature (TDIS) is continuously exceeded
for the entire heating period (DDIS). S3 is used as the
reference sensor and displayed as TSTT.
PDIS:
Monitoring period
Adjustment range:
0 ... 30:0 ... 24 h (dd:hh)
Factory setting: 01:00
This function is used for protecting the upper tank zone
against Legionella by activating the backup heating.
Reference sensor for the thermal disinfection is S3!
ÎTo activate the function, select “On” in the OTD
channel.
OTD:
Thermal disinfection function
Adjustment range: ON / OFF
Factory setting: OFF
Due to the flexible control logic, the exact time of thermal
disinfection is not predictable. In order to set a fixed time
for the disinfection to be run, the starting delay SDIS must
be employed:
If OTD is activated, PDIS will start as soon as the tem-
perature at S3 falls below TDIS. In the display channel
CDIS, the remaining time of PDIS is counted backwards.
If, during the monitoring period, the temperature at S3
exceeds TDIS continuously for the duration of DDIS,
thermal disinfection is considered complete and a new
monitoring period begins.
If CDIS counts down to 00:00, relay 2 will be operated in
order to use the backup heating for thermal disinfection.
CDIS will then be replaced with a display channel DDIS
showing the adjusted heating period. DDIS will start coun-
ting down the heating period as soon as TDIS is exceeded
at S3. As long as DDIS is active, the temperature at S3 will
be displayed as TDIS instead of TSTT.
If, during DDIS, the temperature at S3 exceeds TDIS by
more than 10 °Ra [5 K], relay 2 is switched off until the
temperature falls below TDIS + 4 °Ra [2 K].
If, during DDIS, the temperature at S3 falls below TDIS,
the heating period will restart. DDIS can only be com-
pleted when TDIS is exceeded without interruption.

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System layout 3
Arr 3 VBus
10
9
The controller calculates the temperature difference bet-
ween collector sensor S1 and tank sensor S2. If the diffe-
rence 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 tank will be loaded until the
switch-off temperature difference (DT F) or the maximum
tank temperature (S MX) is reached.
If the maximum collector temperature (CMX) is reached, the
solar pump will be operated by relay 1 and the 3-way-valve
S1
S2
S4 / TR
R1
S3
R2
Display Channels
Channel Description Terminal Page
COL x Temperature collector S1 18
TST x Temperature tank S2 18
S3 x Temperature sensor 3 S3 18
S4 x Temperature sensor 4 S4 18
TR x* Temperature return sensor S4 18
h P1 x Operating hours R1 R1 19
h P2 x Operating hours R2 R2 19
kWh x* Heat quantity kWh - 19
MWh x* Heat quantity MWh - 19
TIME x Time - 16
will be operated by relay 2 in order to direct the surplus
energy to a heat dump. For security purpose this will be
carried out only if the tank temperature is below the non-
adjustable emergency shutdown of 200 °F.
Sensors S3 and S4 can optionally be connected for mea-
surement purposes.
If energy metering (OHQM) is activated, sensor S4 has to
be connected as return sensor.

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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
Adjustment Channels
Channel Description Factory setting Page
Arr x System 3 20
DT O x Switch-on temperature difference 12.0 °Ra [6.0 K] 20
DT F x Switch-off temperature difference 8.0 °Ra [4.0 K] 20
S MX x Maximum tank temperature 140 °F [60 °C] 21
EM x Emergency temperature collector 270 °F [130 °C] 21
CMX s Maximum collector temperature 230 °F [110 °C] 22
OCN x Option minimum limitation OFF 23
CMN x* Minimum collector temperature 50 °F [10 °C] 23
OCF x Option antifreeze OFF 23
CFR x* Antifreeze temperature 40.0 °F [4.0 °C] 23
O TC x Option tube collector OFF 24
TCST x* OTC starting time 07:00 24
TCEN x* OTC ending time 19:00 24
TCRU x* OTC runtime 30 s 24
TCIN x* OTC standstill interval 30 min 24
OHQM x Option energy metering OFF 24
FMAX x* Maximum flow 6.0 l 24
MEDT x* Antifreeze type 1 24
MED% x* Antifreeze concentration (only if MEDT = propylene or ethylene) 45 % 24
MAN1 x Manual operation R1 Auto 26
MAN2 x Manual operation R2 Auto 26
LANG x Language En 26
UNIT x Temperature unit °C 26
RESE x Reset - back to factory defaults 26
W0030100 Version number

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The system monitoring display consists of three blocks:
channel display, tool bar and system screen (active
system layout).
The channel display consists of 2 lines. The upper line is an
alpha-numeric 16-segment display (text display) for displaying
channel names and menu items. In the lower 7-segment
display, the channel values and the adjustment parameters
are displayed.
Temperatures are either indicated in °F or °C, whereas tem-
perature differences are indicated in K or °Ra respectively.
channel display
The additional symbols of the tool bar indicate the current
system status.
tool bar
2. Operation and function
2.1 Push buttons
The controller is operated via three push buttons below
the display.
Button 1 is used for scrolling forward through the indication
menu or to increase the adjustment values. Button 2 is used
for scrolling backward and reducing values. Button 3 is used
for selecting channels and confirming adjustments.
During normal operation, only the display channels are
shown.
ÎScroll through the display channels by pressing but-
tons 1 and 2
Accessing the adjustment channels:
ÎScroll down in the display menu and press button 1
for approx. 2 seconds after you have reached the last
display item.
When an adjustment value is shown on the display,
is indicated to the right of the channel name.
ÎPress the button 3 in order to access the adjustment
mode
starts flashing.
ÎAdjust the value using buttons 1 and 2
ÎBriefly press button 3, permanently appears,the
adjusted value will be saved.
2.2 System monitoring display
system monitoring display
1
3
2
backward (-) forward (+)
OK
(selection / adjustment mode)
operating control lamp
Status standard flashing
relay 1 active
relay 2 active
maximum tank temperature exceeded
tank emergency shutdown active +
collector emergency shutdown active
collector cooling active
system cooling active
tank cooling active +
holiday cooling function activated
holiday cooling function active +
collector minimum limitation active
antifreeze function activated
antifreeze function active
manual operation relay 1 ON +
manual operation relay 2 ON +
manual operation relay 1 / 2 OFF
sensor defective

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The system screen (active system layout) shows the system
selected on the controller. It consists of several system
component symbols, which are – depending on the current
status of the system – either flashing, permanently shown
or hidden.
3-way valve
The flow direction or the
actual switching position is
shown
System screen
system screen
green: everything OK
red/green flashing initialization phase
manual operation
red flashing: sensor fault
(sensor symbol is flashing quickly)
2.3 Flashing codes
LED flashing codes
System screen flashing codes • Pumps are flashing when the corresponding relay is swit-
ched on
• Sensor symbols are flashing if the corresponding sensor
display channel is selected.
• Sensors are flashing quickly in the case of a sensor fault.
• Burner symbol is flashing if the backup heating is active
collector sensor
collector
valve
(heat dump)
tank
tank heat exchanger
tank sensor (top)
Pump
Tank
with heat exchanger
Backup heating
with burner symbol
Temperature sensor
Collector
with collector sensor
tank sensor
(bottom)
backup heating pump
solar pump
booster pump
backup heating with
burner symbol
heat exchanger
(heat dump)

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3. Commissioning ÎEstablish the power supply
During a short initialization phase, the operating control
lamp flashes red and green.
When the controller is commissioned for the first time
or after a reset, it will run a commissioning menu. The
commissioning menu leads the user through the most
important adjustment channels needed for operating the
system.
Operating the commissioning menu:
ÎEnter the channel by pressing button 3
The symbol flashes.
ÎAdjust the value by pressing buttons 1 and 2
ÎSave the adjustment by pressing button 3 again
The symbol stops flashing.
ÎPress button 1 or 2 to switch to the next or previous
channel
1
23
(OK)
The three pushbuttons of the BS/3 controller
The commissioning menu consists of the following 5
channels:
1. Language
ÎAdjust the desired menu language in this channel
• dE : German
• En : English
LANG:
Language selection
Selection: dE, En
Factory setting: En
2. Unit
ÎAdjust the unit in which temperatures and tempera-
ture differences shall be displayed
UNIT:
Temperature unit selection
Selection: °F, °C
Factory setting: °C
3. Time
ÎAdjust the current time for the real time clock
The hours and minutes have to be adjusted separately, first
the hours, then the minutes.
TIME:
Real time adjustment

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Arr:
System layout selection
Adjustment range: 1 ... 3
Factory setting: 1
4. System layout
ÎAdjust the desired system layout of your solar ther-
mal system
For a detailed description of the different system layouts
selectable, see chapter 1.4.
If the system layout selection is changed later on, any
previous adjustments which have been made in the other
channels will be lost. Therefore, changing the system layout
is always followed by a security enquiry.
Only confirm the security enquiry if you are sure that
you wish to change the system layout selection!
Security enquiry: ÎTo confirm the security enquiry, press button 3
Overview of system layouts:
Arr 1 : standard solar system layout
Arr 2 : solar system layout with backup heating
Arr 3 : standard solar system layout with heat dump
Arr 3
Arr 1 Arr 2
Now the controller is ready for operation with typical
settings to suit the selected system layout.
The settings made in the commissioning menu can be
changed later on in the corresponding adjustment channels.
Additional functions and options can of course be individu-
ally adjusted as well (see chap. 4.2).
5. Maximum tank temperature
ÎAdjust the desired maximum tank temperature
S MX:
Maximum tank temp.
Adjustment range:
40 ... 200 °F [4 ... 95 °C]
Arr 3:
40 ... 190 °F [4 ... 90 °C]
in steps of 2 °Ra [1 K]
Factory setting:140 °F [60 °C]
Note:
The controller is also equipped with a non-
adjustable emergency shutdown function, which
will shut the system down if the tank reaches
200 °F [95 °C].
Completing the commissioning menu
After the last channel of the commissioning menu has been
adjusted and confirmed, the controller asks for confirma-
tion of the adjustments.
ÎTo confirm the adjustments made in the commissio-
ning menu, press button 3
Confirmation enquiry

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Indication of collector temperature Indicates the current collector temperature.
COL:
Collector temperature
Display range: -40 ... +500 °F
[-40 ... +260 °C]
Indication of tank temperatures Indicates the current tank temperature.
•TST : tank temperature
•TSTB : tank temperature bottom
•TSTT : tank temperature top
•TDIS : thermal disinfection temperature
(replaces TSTT if, during thermal disinfection, the he-
ating period DDIS is active)
TSTB, TSTT and TDIS are available in system layout 2
(Arr = 2) only.
TST, TSTB, TSTT, TDIS:
Tank temperatures
Display range: -40 ... +500 °F
[-40 ... +260 °C]
Indication of sensors 3 and 4 Indicates the current temperature of the corresponding
additional sensor (without control function).
• S3 : temperature sensor 3 (Arr = 1 and 3 only)
• S4 : temperature sensor 4
S3, S4:
Sensor temperatures
Display range: -40 ... +500 °F
[-40 ... +260 °C]
Indication of return temperature If energy metering is active, the temperature at sensor 4 is
indicated as TR.
TR:
Return tempe rature
Display range: -40 ... +500 °F
[-40 ... +260 °C]
Note:
S3 and S4 will only be indicated if the temperature
sensors are connected.
Initialization Indicates the time adjusted in tDTO, running backwards.
INIT:
ODB initialization active
Filling time Indicates the time adjusted in tFLL, running backwards.
FLL:
ODB filling time active
Stabilization Indicates the time adjusted in tSTB, running backwards
(Arr = 1 only).
STAB:
Stabilization
4.1 Display channels Note:
The displayed values and adjustment channels
depend on which system layout, which options
and functions have been selected. Only values
and adjustment channels available for the indivi-
dual settings selected will appear in the menu.
Indication of drainback time periods
4. Channel overview

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Operating hours counter The operating hours counter accumulates the solar opera-
ting hours of the respective relay (h P / h P1 / h P2). Full
hours are displayed.
The accumulated operating hours can be set back to 0. As
soon as one operating hours channel is selected, the symbol
is displayed.
ÎIn order to access the RESET-mode of the counter,
press button 3 for approx. 2 seconds.
The display symbol will flash and the operating hours
will be set to 0.
ÎConfirm the reset with button 3 in order to finish the
reset.
In order to interrupt the RESET-process, do not press a
button for about five seconds. The display returns to the
display mode.
h P / h P1 / h P2:
Operating hours counter
Display channel
kWh/MWh: Heat quantity
in kWh / MWh
Display channel
Indicates the energy gained in heat quantity – only available if
energy metering (OHQM) is activated.
The flow rate as well as the reference sensors S1 (flow) and
S4 (return) are used for calculating the heat quantity supplied.
It is shown in kWh in the channel kWh and in MWh in the
channel MWh. The overall heat quantity results from the
sum of both values.
The accumulated heat quantity can be set back to 0. As soon
as one of the display channels of the heat quantity is selected,
the symbol is permanently shown on the display.
ÎPress button 3 for about 2 seconds in order to access
the RESET mode of the counter.
The display symbol will flash and the heat quantity
value will be set to 0.
ÎIn order to finish this process, press button 3 to
confirm.
In order to interrupt the RESET-process, do not press a
button for about five seconds. The display returns to the
display mode.
CDIS
Countdown of monitoring
period
Display range:
0 ... 30:0 ... 24 (dd:hh)
If the thermal disinfection option (OTD) is activated and
the monitoring period is in progress, the remaining moni-
toring time will be displayed as CDIS (in days and hours)
and counted backwards.
SDIS
Starting time display
Display range:
00:00 ... 24:00 (hh:mm)
DDIS
Heating period display
Display range:
00:00 ... 24:00 (hh:mm)
If the thermal disinfection option (OTD) is activated and
the heating period is in progress, the remaining time of the
heating period is displayed (in hours and minutes) in this
channel, counting backwards.
If the thermal disinfection option (OTD) is activated and
a starting delay time has been adjusted, the adjusted delay
time is displayed (flashing) in this channel.
TIME Indicates the current time.
ÎPress button 3 for two seconds to adjust the hours
ÎSet the hours by pressing buttons 1 and 2
ÎPress button 3 again to adjust the minutes
ÎSet the minutes by pressing buttons 1 and 2
ÎPress button 3 in order to save the adjustments

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∆T-regulation
DT O:
Switch-on temperature diff.
Adjustment range: 2.0 ... 40.0°Ra
[1.0 ... 20.0 K]
in steps of 1 °Ra [0.5 K]
Factory setting: 12.0°Ra
[6.0 K]
DT F:
Switch-off temperature diff.
Adjustment range: 1.0 ... 39.0°Ra
[0.5 ... 19.5 K]
in steps of 1 °Ra [0.5 K]
Factory setting: 8.0°Ra
[4.0 K]
The controller works as a standard differential controller. If
the switch-on difference is reached, the pump is activated.
When the temperature difference falls below the adjusted
switch-off temperature difference, the relay switches off.
Note:
The switch-on temperature difference must be
at least 1 °Ra [0.5 K] higher than the switch-off
tempe rature difference.
4.2 Adjustment channels
System layout selection
Arr:
System layout selection.
Adjustment range: 1 ... 3
Factory setting: 1
In this channel, a pre-defined system layout can be selected.
Each system layout has a set of pre-programmed settings
that can be individually changed.
If the system layout selection is changed later on, all adjust-
ments made in the other channels will be lost. Therefore,
changing the system layout is always followed by a security
enquiry.
Only confirm the security enquiry if you are sure that
you wish to change the system layout selection!
Note:
When the drainback option ODB is activated,
the temperature differences DT O and DT F
are set to a fixed adjustment:
DT O = 20 °Ra [10 K]
DT F = 8 °Ra [4 K]
Previous adjustments made in these channels will
be overridden and may have to be entered again if
ODB is deactivated later on.
Security enquiry:
ÎTo confirm the security enquiry, press button 3