REMEHA Sol Plus User Manual

Sol Plus

Solar controller with “SOLARFIRST” function and “STEAMBACK®” safety function

Manual for the specialised craftsman

Installation Operation Functions and options Troubleshooting

*11208356*

11208356

Thank you for buying this product. Please read this manual carefully to get the best performance from this unit. Please keep this manual carefully.

Manual

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 solar controller is designed for electronically controlling standard solar thermal

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 controller.

Î Make sure the controller 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!

Î They 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.

Î Arrows 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 environmentally sound disposal of the devices.

Contents

1 Overview .............................................................................................. 5

2 Installation ........................................................................................... 6

2.1 Mounting ........................................................................................................................6

2.2 Electrical connection ...................................................................................................6

2.3 PWM outputs ................................................................................................................7

2.4 Data communication / Bus .......................................................................................... 7

2.5 System overview ...........................................................................................................7

2.6 Systems ...........................................................................................................................9

3 Application examples ........................................................................ 47

4 Operation and function .................................................................... 48

4.1 Buttons ........................................................................................................................ 48

5 System-Monitoring-Display .............................................................. 48

5.1 Flashing codes ............................................................................................................ 49

6 Commissioning .................................................................................. 50

7 Channel overview .............................................................................. 52

7.1 Display channels ......................................................................................................... 52

7.2 Adjustment channels ................................................................................................ 55

8 Troubleshooting ................................................................................. 66

9 Accessories ........................................................................................ 69

9.1 Sensors and measuring instruments ..................................................................... 70

9.2 VBus

accessories ..................................................................................................... 70

9.3 Interface adapters ...................................................................................................... 70

10 Index ................................................................................................... 71

Sol Plus solar controller

The Sol Plus has been especially developed for the speed control of high-efciency

pumps in standard solar and heating systems. It is equipped with 2 PWM outputs. Solar packages for DHW heating and heating backup with DeDietrich boilers: The SOLAR Sol Plus with “SOLARFIRST” function (see page 47) and ModBus

controls a solar system with 1 collector eld and 1 store with integrated heat exchanger. The Sol Plus is designed for DHW heating and heating backup.

The Sol Plus controllers are equipped with the “SOLARFIRST” function via ModBus and can be connected to DeDietrich boiler controllers by means of ModBus cables.

As soon as the solar control switches on, the system will be set to solar priority via the connection to the boiler.

The set hot water temperature will be reduced (adjustable 0-30 K). This way, the water will be heated by the solar system rst. If the solar system switches off, solar priority will be stopped and the controller switches the boiler to its standard adjustments.

Due to this function, the solar system can supply 20 % more heat for the store.

The “STEAMBACK” safety concept: The Sol Plus controller is part of the “STEAMBACK” safety concept. If the col-

lector temperature reaches 130 °C, all functions will be deactivated. The uid in

the collector continues heating and will turn into vapour at 140 °C. It will then be pressed into the expansion vessel through extension.

The collector will not contain any solar uid then. There will be no steam hammer - the solar uid will not be harmed. If the suns goes down and if the collector temperature falls below 140 °C, the solar uid will condense and the pressure in the expansion vessel will ll the collector again. Only if the collector temperature

falls below 100 °C and that of the store below 60 °C, will the controller activate the solar system.

Whether holiday, power failure or fault - the DeDietrich “STEAMBACK” safety function protects your solar system and makes it maintenance-free and durable.

The Sol Plus solar controller is used for controlling a solar system with 1 store with integrated heat exchanger and one 3-port valve for return preheating. It can also control a solar system with 1 store with 2 integrated heat exchangers via a 3-port valve. The Sol Plus is designed for DHW heating and heating backup in solar thermal systems connected in series.

It can be directly mounted onto the pump station. For using several functions such as store base/top or combined store with return preheating, the controller can also control a 3-port valve in addition to the solar circuit pump. The parameter Arr can

be used for selecting the system conguration.

1 Overview

• Especially designed for the speed control of high-efciency pumps

• System-Monitoring-Display

• Up to 4 Pt1000 temperature sensors

• 2 semiconductor relays for pump speed control

• HE pump control

• Heat quantity measurement

• Commissioning menu

• 10 basic systems to choose from

• Function control

• Optional thermal disinfection function

• Drainback option

• Unit °F and °C selectable

• “SOLARFIRST” function

172

Upper fastening

130

Lower fastening

Technical data

Inputs: 4 Pt1000 temperature sensors

Outputs: 2 semiconductor relays, 2 PWM outputs

PWM frequency: 512 Hz PWM voltage: 10.5 V Switching capacity per relay:

R1: 1 (1) A 100 … 240 V~ (semiconductor relays) R2: 1 (1) A 100 … 240 V~ (semiconductor relays)

Total switching capacity: 2 A 240 V~

Power supply: 100 … 240 V~, 50 … 60 Hz

Supply connection: type Y attachment

Power consumption (standby): < 1 W

Mode of operation: type 1.C.Y action

Rated impulse voltage: 2.5 kV

Data interface: VBus

current supply: 35 mA

VBus

, ModBus switching signal for the “SOLARFIRST” function

Functions: function control, operating hours counter, tube collector function, thermostat function, speed control, drainback and booster option, heat quantity measurement

Housing: plastic, PC-ABS and PMMA

Mounting: wall mounting, also suitable for mounting into patch panels

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

Protection type: IP 20 / EN 60529

Protection class: I

Ambient temperature: 0 … 40 °C [32 … 104 °F]

Degree of pollution: 2

Dimensions: 172 x 110 x 46 mm

110

2 Installation

2.1 Mounting

WARNING!

Installation Indications, functions and options MessagesCommissioningOperation and function

Electric shock!

Upon opening the housing, live parts are exposed!

Î Always disconnect the device from power supply

before opening the housing!

Note

Strong electromagnetic elds can impair the function of the controller.

Î Make sure the controller 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. In order to mount the device to the wall, carry out the following steps:

Î Unscrew the crosshead screw from the cover and remove it along with the

cover from the housing.

Î Mark the upper fastening point on the wall. Drill and fasten the enclosed wall

plug and screw leaving the head protruding.

Î Hang the housing from the upper fastening point and mark the lower fastening

point (centres 130 mm). Î Insert lower wall plug. Î Fasten the housing to the wall with the lower fastening screw and tighten. Î Carry out the electrical wiring in accordance with the terminal allocation (see

chapter 2.2). Î Put the cover on the housing. Î Attach with the fastening screw.

display

cover

cable conduits with strain relief

button

fuse T4A

2.2 Electrical connection

WARNING!

ESD damage!

Electrostatic discharge can lead to damage to electronic components!

Î Take care to discharge properly before touching the

inside of the device!

WARNING!

Electric shock!

Upon opening the housing, live parts are exposed!

Î Always disconnect the device from power supply be-

fore opening the housing!

Note

The mains connection must be carried out with the common ground of the building to which the pipework of the solar circuit is connected.

Note

Connecting the device to the power supply must always be the last step of the installation!

Note

The pump speed must be set to 100 % when auxiliary relays or valves are connected.

1 (1) A 240 V~ 1 (1) A 240 V~

R1 R2

2019

171615

14131212

NR2

T2A

100 ... 240 V~

50-60 Hz

Temp. Sensor Pt1000

S2S1 S3 S4 VBus

PWM 1/2

ModBus

345678910

F-67580 Mertzwiller

DDTh

Sol Plus

Article/Artikel 7630422

Soft version 2.00

Serial number

IP 20

The power supply of the device must be 100 … 240 V~ (50 … 60 Hz). Attach exible

1 (1) A 240 V~ 1 (1) A 240 V~

T2A

100 ... 240 V~

50-60 Hz

F-67580 Mertzwiller

DDTh

Sol Plus

Article/Artikel 7630422

Soft version 2.00

Serial number

IP 20

1 (1) A 240 V~ 1 (1) A 240 V~

R1 R2

2019

NR2

T2A

100 ... 240 V~

50-60 Hz

Temp. Sensor Pt1000

S2S1 S3 S4 VBus

PWM 1/2

ModBus

F-67580 Mertzwiller

DDTh

Sol Plus

Article/Artikel 7630422

Soft version 2.00

Serial number

IP 20

cables to the housing with the enclosed strain relief and the corresponding screws.

The controller is equipped with 2 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 earth conductorr ⏚ 14 = Protective earth conductorr ⏚

The mains connection is at the following terminals:

19 = Neutral conductor N

20 = Conductor L

12 = Protective earth conductor ⏚

Connect the temperature sensors (S1 to S4) to the corresponding terminals

with either polarity:

1 / 2 = Sensor 1 (e. g. collector sensor 1)

3 / 4 = Sensor 2 (e. g. store sensor 1)

5 / 6 = Sensor 3 (e. g. store sensor top)

7 / 8 = Sensor 4 (e. g. return sensor)

Fuse

2.3 PWM outputs

Speed control of a HE pump is possible via a PWM signal. The pump has to be connected to the relay as well as 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 control input.

PWM 1/2

1 = PWM output 1, control signal 2 = PWM output 1, GND 3 = PWM output 2, GND

2 4

1 3

4 = PWM output 2, control signal

1 = ModBus A 2 = GND 3 = free

2 4

1 3

4 = ModBus B

ModBus = Optional (for connection to the boiler (if provided by the boiler))

2.4 Data communication / Bus

The controller is equipped with the VBus

for data transfer and energy supply

to external modules. The connection is to be carried out at the terminals marked VBus (either polarity).

One or more VBus

modules can be connected via this data bus, such as:

• DL2 Datalogger

• DL3 Datalogger Furthermore, the controller can be connected to a PC or integrated into a network

via the VBus

/USB or VBus®/LAN interface adapter (not included).

Note

More accessories on page 69.

InstallationIndications, functions and optionsMessages Commissioning Operation and function

ModBus

connection

PWM

connection

VBus

sensor terminals

protective earth conductor terminal

load terminals

mains

terminals

2.5 System overview

Standard solar system (page 9)

Solar system with 2 stores and valve logic (page 26)

Solar system with heating circuit return preheating (page 41)

Solar system with heat exchange (page 12)

Solar system with 2 stores and pump logic (page 29)

Standard solar system with heat dump (page 44)

Solar system with backup heating (page 18)

Solar system with east-/west collectors and 1 store (page 32)

Solar system with store loading in layers (page 23)

Solar system with backup heating by solid fuel boiler (page 35)

2.6 Systems

VBus

PWM 1/2

ModBus

Arrangement 1: Standard solar system

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 activated 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. S3 can optionally be used as the reference sensor for the store emergency shutdown option (OSEM).

If heat quantity measurement (OHQM) is activated, S4 is used as the return sensor. If the drainback option (ODB) is activated, relay 2 can be used for activating a

booster pump. For this purpose, the booster function (OBST) has to be activated.

InstallationIndications, functions and optionsMessages Commissioning Operation and function

S4 / TR

S3 / TSTT

R1 R2

drainback system layout

(with booster pump)

exemplary

Display channels

Channel Description Connection terminal Page INIT x* ODB initialisation active - 52 FLL x* ODB lling time active - 52

Installation Indications, functions and options MessagesCommissioningOperation and function

STAB x* ODB stabilisation in progress - 52 COL x Temperature collector S1 53 TST x Temperature store S2 53 S3 x Temperature sensor 3 S3 53 TSTT x* Temperature store top S3 53 S4 x Temperature sensor 4 S4 53 n % x Speed R1 R1 54 hP x Operating hours R1 R1 55 hP1 x* Operating hours R1 (if OBST is activated) R1 55 hP2 x* Operating hours R2 (if OBST is activated) R2 55 kWh x* Heat quantity in kWh - 54 MWh x* Heat quantity in MWh - 54 TIME x Time - 55

Adjustment channels

Channel Description Factory setting Page Arr x System 1 55 DT O x Switch-on temperature difference R1 6.0 K [12.0 °Ra] 56 DT F x Switch-off temperature difference R1 4.0 K [8.0 °Ra] 56 DT S x Set temperature difference R1 10.0 K [20.0 °Ra] 56 RIS x Rise R1 2 K [4 °Ra] 56

PUM1 x Pump control type R1 PSOL 56

nMN x Minimum speed R1 30 % 57

nMX x Maximum speed R1 100 % 57

S MX x Maximum store temperature 75 °C [167 °F] 57 OSEM x Store emergency shutdown option OFF 57

EM x

OCC x Collector cooling option OFF 58 CMX x* Maximum collector temperature 110 °C [230 °F] 58 OSYC x System cooling option OFF 59

Collector emergency temperature 130 °C [270 °F] 58 Collector emergency temperature if ODB is activated: 95 °C [200 °F] 58

Adjustment channels

Channel Description Factory setting Page DTCO x* Switch-on temperature difference cooling 20.0 K [40.0 °Ra] 59 DTCF x* Switch-off temperature difference cooling 15.0 K [30.0 °Ra] 59 OSTC x Store cooling option OFF 59 OHOL x* Holiday cooling option OFF 59 THOL x* Holiday cooling temperature 40 °C [110 °F] 59 OCN x Collector minimum limitation option OFF 60 CMN x* Collector minimum temperature 10 °C [50 °F] 60 OCF x Antifreeze option OFF 60 CFR x* Antifreeze temperature 4.0 °C [40.0 °F] 60 OTC x Tube collector option OFF 62 TCST x* OTC starting time 07:00 62 TCEN x* OTC ending time 19:00 62 TCRU x* OTC runtime 30 s 62 TCIN x* OTC standstill interval 30 min 62 OHQM x Heat quantity measurement option OFF 62 FMAX x* Maximum ow rate 6.0 l/min 63 MEDT x* Antifreeze type 1 63 MED% x* Antifreeze concentration (only if MEDT = propylene or ethylene glycol) 45 % 63 ODB x Drainback option OFF 63 tDTO x* ODB switch-on condition - time period 60 s 64 tFLL x* ODB lling time 5.0 min 64 tSTB x* ODB stabilisation time 2.0 min 64 OBST s* Option booster function OFF 64

MAN1 x Manual mode R1 Auto 64 MAN2 x Manual mode R2 Auto 64 MB x ModBus slave address 60 65 LANG x Language dE 65 UNIT x Temperature unit °C 65 RESE x Reset - back to factory settings 65 ######## Version number

InstallationIndications, functions and optionsMessages Commissioning Operation and function

Legend:

Symbol Description

x Channel is available x* Channel is available, if the corresponding option is activated. s* System-specic channel, only available if the corresponding option is activated

Arrangement 2: Solar system with heat exchange

VBus

PWM 1/2

ModBus

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 activated by relay

Installation Indications, functions and options MessagesCommissioningOperation and function

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 temperature 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 store are reached. S3 can optionally be used as the reference sensor for the store emergency shutdown option (OSEM).

Store 1 Store 2

S3 / TSTT

Display channels

Adjustment channels

Channel Description Factory setting Page Arr x System 2 55 DT O x Switch-on temperature difference R1 6.0 K [12.0 °Ra] 56 DT F x Switch-off temperature difference R1 4.0 K [8.0 °Ra] 56 DT S x Set temperature difference R1 10.0 K [20.0 °Ra] 56 RIS x Rise R1 2 K [4 °Ra] 56

PUM1 x Pump control type R1 PSOL 56

n1MN x Minimum speed R1 30 % 57

n1MX x Maximum speed R1 100 % 57

S MX x Maximum store temperature 75 °C [167 °F] 57 OSEM x Store emergency shutdown option OFF 57

PUM2 x Pump control type R2 OnOF 56

n2MN x* Minimum speed R2 30 % 57

n2MX x* Maximum speed R2 100 % 57

EM x

OCC x Collector cooling option OFF 58 CMX x* Maximum collector temperature 110 °C [230 °F] 58 OSYC x System cooling option OFF 59 DTCO x* Switch-on temperature difference cooling 20.0 K [40.0 °Ra] 59 DTCF x* Switch-off temperature difference cooling 15.0 K [30.0 °Ra] 59 OSTC x Store cooling option OFF 59 OHOL x* Holiday cooling option OFF 59

Collector emergency temperature 130 °C [270 °F] 58 Collector emergency temperature if ODB is activated: 95 °C [200 °F] 58

InstallationIndications, functions and optionsMessages Commissioning Operation and function

Adjustment channels

Channel Description Factory setting Page THOL x* Holiday cooling temperature 40 °C [110 °F] 59 OCN x Collector minimum limitation option OFF 60 CMN x* Collector minimum temperature 10 °C [50 °F] 60

Installation Indications, functions and options MessagesCommissioningOperation and function

OCF x Antifreeze option OFF 60 CFR x* Antifreeze temperature 4.0 °C [40.0 °F] 60 OTC x Tube collector option OFF 62 TCST x* OTC starting time 07:00 62 TCEN x* OTC ending time 19:00 62 TCRU x* OTC runtime 30 s 62 TCIN x* OTC standstill interval 30 min 62 DT3O s Switch-on temperature difference R2 6.0 K [12.0 °Ra] 56 DT3F s Switch-off temperature difference R2 4.0 K [8.0 °Ra] 56 DT3S s Set temperature difference R2 10.0 K [20.0 °Ra] 56 RIS3 s Rise R2 2 K [4 °Ra] 56 MX3O s Switch-on threshold for maximum temperature 60.0 °C [140.0 °F] 40 MX3F s Switch-off threshold for maximum temperature 58.0 °C [136.0 °F] 40 MN3O s Switch-on threshold for minimum temperature 5.0 °C [40.0 °F] 40 MN3F s Switch-off threshold for minimum temperature 10.0 °C [50.0 °F] 40 ODB x Drainback option OFF 63 tDTO x* ODB switch-on condition - time period 60 s 64 tFLL x* ODB lling time 5.0 min 64 tSTB x* ODB stabilisation time 2.0 min 64 MAN1 x Manual mode R1 Auto 64 MAN2 x Manual mode R2 Auto 64 MB x ModBus slave address 60 65 LANG x Language dE 65 UNIT x Temperature unit °C 65 RESE x Reset - back to factory settings 65 ######## Version number

Legend:

Symbol Description

x Channel is available

x* Channel is available, if the corresponding option is activated.

s System-specic channel

System-specic functions

The following adjustments are used for the specic functions in system 2.

∆T control for the heat exchange between 2 stores

DT3O

Switch-on temperature difference Adjustment range: 1.0 … 20.0 K [2.0 … 40.0°Ra] Factory setting: 6.0 K [12.0 °Ra]

Speed control

DT3S

Set temperature difference Adjustment range: 1.5 … 30.0 K [3.0 … 60.0 °Ra] Factory setting: 10.0 K [20.0 °Ra]

Note

For pump speed control of the heat exchange pump, the operating mode of relay 2 must be set to Auto in the adjustment channel MAN2.

InstallationIndications, functions and optionsMessages Commissioning Operation and function

DT3F Switch-off temperature difference Adjustment range: 0.5 … 19.5 K [1.0 … 39.0°Ra] Factory setting: 4.0 K [8.0 °Ra]

S3 and S4 are used as the reference sensors for this function.

In system 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 adjusted switch-on temperature difference, relay 2 switches on. When the temperature difference 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] higher than the switch-off temperature difference.

RIS3 Rise Adjustment range: 1 … 20 K [2 … 40 °Ra] Factory setting: 2 K [4 °Ra] If the switch-on difference is reached, the pump switches on at full speed for 10 s. Then, the speed is reduced to the minimum pump speed value (n2MN).

If the temperature difference reaches the adjusted set value (DT3S), the pump speed increases by one step (10 %). Each time the difference increases by the adjustable rise value RIS3, the pump speed increases by 10 % until the maximum pump speed of 100% is reached.

Note

The set temperature difference must be at least 0.5 K [1 °Ra] higher than

the switch-on temperature difference.

Installation Indications, functions and options MessagesCommissioningOperation and function

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 (burst control via semiconductor relay)

Adjustment for high-efciency pump (HE pump)

• PSOL (PWM prole for a HE solar pump)

• PHEA (PWM prole for a HE heating pump)

n2MN

Minimum speed R2 Adjustment range: (10) 30 … 100 % Factory setting: 30 %

A relative minimum pump speed can be allocated to the output R2 via the adjustment channel n2MN.

Note

The pump speed must be set to 100 % when auxiliary relays or valves are connected.

n2MX

Maximum speed R2 Adjustment range: (10) 30 … 100 % Factory setting: 100 %

In the adjustment channel n2MX a relative maximum speed for a pump connected can be allocated to the output R2.

Note

The pump speed must be set to 100 % when auxiliary relays or valves are connected.

Maximum temperature limitation heat exchange

Minimum temperature limitation heat exchange

InstallationIndications, functions and optionsMessages Commissioning Operation and function

MX3O / MX3F

Maximum temperature limitation Adjustment range: 0.0 … 95.0 °C [30.0 … 200.0 °F] Factory setting: MX3O: 60.0 °C [140.0 °F] MX3F: 58.0 °C [136.0 °F]

S4 is used as the reference sensor for the maximum temperature limitation.

The maximum temperature limitation function provides a maximum temperature setting, usually to reduce scald risk in a store. If MX3O is exceeded, relay 2 is switched off until the temperature at sensor 4 falls below MX3F.

MN3O / MN3F

Minimum temperature limitation Adjustment range: 0.0 … 90.0 °C [30.0 … 190.0 °F] Factory setting (only if Arr = 2): MN3O: 5.0 °C [40.0 °F] MN3F: 10.0 °C [50.0 °F]

S3 is used as the reference sensor for the minimum temperature limitation.

The minimum temperature limitation function provides a minimum temperature setting for the heat source in system 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.

Arrangement 3: Solar system with backup heating

Installation Indications, functions and options MessagesCommissioningOperation and function

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 thermostat function, which operates relay 2 for backup heating 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.

PWM 1/2

Sensor S3 can optionally be used as the reference sensor for the thermal disinfection function (OTD) or the store emergency shutdown option (OSEM).

Sensor S4 can optionally be connected. If heat quantity measurement (OHQM) is activated, S4 is used as the return sensor.

ModBus

VBus

S3 / TSTT

S4 / TR

Display channels

Channel Description Connection terminal Page INIT x* ODB initialisation active - 52 FLL x* ODB lling time active - 52 STAB x* ODB stabilisation in progress - 52 COL x Temperature collector S1 53 TSTB x Temperature store 1 base S2 53 TSTT x Temperature store 1 top S3 53 TDIS s* Thermal disinfection temperature (thermal disinfection) S3 53 S4 x Temperature sensor 4 S4 53 n1 % x Speed R1 R1 54 h P1 x Operating hours R1 R1 55 h P2 x Operating hours R2 R2 55 kWh x* Heat quantity in kWh - 54 MWh x* Heat quantity in MWh - 54 CDIS s* Countdown of monitoring period (thermal disinfection) - 54 SDIS s* Starting time display (thermal disinfection) - 54 DDIS s* Heating period display (thermal disinfection) - 54 TIME x Time - 55

Adjustment channels

Channel Description Factory setting Page Arr x System 3 55 DT O x Switch-on temperature difference R1 6.0 K [12.0 °Ra] 56 DT F x Switch-off temperature difference R1 4.0 K [8.0 °Ra] 56 DT S x Set temperature difference R1 10.0 K [20.0 °Ra] 56 RIS x Rise R1 2 K [4 °Ra] 56

PUM1 x Pump control type R1 PSOL 56

n1MN x Minimum speed R1 30 % 57

n1MX x Maximum speed R1 100 % 57

S MX x Maximum store temperature 75 °C [167 °F] 57 OSEM x Store emergency shutdown option OFF 57

EM x

Collector emergency temperature 130 °C [270 °F] 58 Collector emergency temperature if ODB is activated: 95 °C [200 °F] 58

InstallationIndications, functions and optionsMessages Commissioning Operation and function

Adjustment channels

Channel Description Factory setting Page CMN x* Collector minimum temperature 10 °C [50 °F] 60 OCF x Antifreeze option OFF 60 CFR x* Antifreeze temperature 4.0 °C [40.0 °F] 60

Installation Indications, functions and options MessagesCommissioningOperation and function

OTC x Tube collector option OFF 62 TCST x* OTC starting time 07:00 62 TCEN x* OTC ending time 19:00 62 TCRU x* OTC runtime 30 s 62 TCIN x* OTC standstill interval 30 min 62 OHQM x Heat quantity measurement option OFF 62 FMAX x* Maximum ow rate 6.0 l/min 63 MEDT x* Antifreeze type 1 63 MED% x* Antifreeze concentration 45 % 63 AH O s Switch-on temperature for thermostat 40 °C [110 °F] 21 AH F s Switch-off temperature for thermostat 45 °C [120 °F] 21 t1 O s Thermostat switch-on time 1 00:00 21 t1 F s Thermostat switch-off time 1 00:00 21 t2 O s Thermostat switch-on time 2 00:00 21 t2 F s Thermostat switch-off time 2 00:00 21 t3 O s Thermostat switch-on time 3 00:00 21 t3 F s Thermostat switch-off time 3 00:00 21 ODB x Drainback option OFF 63 tDTO x* ODB switch-on condition - time period 60 s 64 tFLL x* ODB lling time 5.0 min 64 tSTB x* ODB stabilisation time 2.0 min 64 OTD s Thermal disinfection option OFF 22 PDIS s* Monitoring period 01:00 22 DDIS s* Heating period 01:00 22 TDIS s* Disinfection temperature 60 °C [140 °F] 22 SDIS s* Starting time 00:00 22 MAN1 x Manual mode R1 Auto 64 MAN2 x Manual mode R2 Auto 64 MB x ModBus slave address 60 65 LANG x Language dE 65 UNIT x Temperature unit °C 65 RESE x Reset - back to factory settings 65 ######## Version number

Legend:

Symbol Description

x Channel is available

x* Channel is available, if the corresponding option is activated.

s System-specic channel

s* System-specic channel, only available if the corresponding option is activated

System-specic functions

The following adjustments are used for the specic functions in system 3. The channels described are not available in any other systems.

Thermostat function

Backup heating

Use of surplus energy

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 ⓶ will be shown on the display, if the second relay output is activated.

S3 is used as the reference sensor for the thermostat function.

AH O

Thermostat switch-on temperature Adjustment range: 0.0 … 95.0 °C [30.0 … 200.0 °F] Factory setting: 40.0 °C [110.0°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 3 time frames t1 … t3.

If the thermostat function is supposed to run from 06:00 a.m. to 09:00 a.m. only, adjust t1 O to 06:00 a.m. and t1 F to 09:00 a.m.

If the switch-on and switch-off times of a time frame are set to an identical value, the time frame will be inactive. If all time frames are set to 00:00, the thermostat function is solely temperature dependent (factory setting).

InstallationIndications, functions and optionsMessages Commissioning Operation and function

AH F

Thermostat switch-off temperature Adjustment range: 0.0 … 95.0 °C [30.0 … 200.0 °F] Factory setting: 45.0 °C [120.0 °F]

Thermal disinfection of the upper DHW zone

Installation Indications, functions and options MessagesCommissioningOperation and function

OTD

Therm. disinfection function Adjustment range: OFF / ON Factory setting: OFF

PDIS

Monitoring period Adjustment range: 0 … 30:0 … 24 h (dd:hh) Factory setting: 01:00

DDIS

Heating period Adjustment range: 0:00 … 23:59 (hh:mm)

Factory setting: 01:00

This function helps to contain the spread of Legionella in DHW stores by systematically activating the backup heating.

For thermal disinfection, the temperature at the reference sensor will be monitored. Protection is ensured when, during the monitoring period, the disinfection temperature is continuously exceeded for the entire disinfection period.

The monitoring period starts as soon as the temperature at the reference sensor falls below the disinfection temperature. When the monitoring period ends, the allocated reference relay activates the backup heating. The disinfection period starts, if the temperature at the allocated sensor exceeds the disinfection temperature.

Thermal disinfection can only be completed when the disinfection temperature is exceeded for the duration of the disinfection period without any interruption.

Starting time delay

SDIS

Starting time Adjustment range: 0:00 … 24:00 (time) Factory setting: 00:00

If the starting delay option is activated, a starting time for the thermal disinfection with starting delay can be adjusted. The activation of the backup heating is then delayed until that starting time after the monitoring period has ended.

If the monitoring period ends, for example, at 12:00 o'clock, and the starting time has been set to 18:00, the reference relay will be energised with a delay of 6 hours at 18:00 instead of 12:00 o'clock.

Note If the thermal disinfection option is activated, the display channels TDIS,

CDIS, SDIS and DDIS will be displayed.

TDIS

Disinfection temperature Adjustment range: 0 … 95 °C [30 … 200 °F] Factory setting: 60 °C [140 °F]

+ 50 hidden pages

REMEHA Sol Plus User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Overview

2 Installation

2.1 Mounting

2.2 Electrical connection

2.3 PWM outputs

2.4 Data communication / Bus

2.6 Systems