STIEBEL ELTRON SOM6PLUS User Manual

ATTENTION: INSTALLING THE CONTROLLER WITH THE

DEFAULT SETTINGS IS NOT RECOMMENDED. IN ORDER TO PREVENT OVERHEATING OF THE SYSTEM HEAT EXCHANGER FLUID OR DOMESTIC HOT WATER THE SETTINGS “OCC” AND “OSTC” SHOULD BE SET TO “ON” AND THE SETTING “EM” SHOULD BE RAISED TO 290 °F.

OPERATION AND INSTALLATION

SOLAR CONTROLLER

» SOM 6 PLUS

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 ......................................................6

2. Operation and function ................................................8

2.1 Push buttons ................................................................ 8

2.2 System monitoring display ........................................... 8

General

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.

Please pay attention to the following safety advice in order to avoid danger and damage to people and property.

Subject to technical change. Errors excepted.

2.3 Flashing codes ............................................................. 9

3. Commissioning........................................................... 10

4. Channel overview ......................................................11

4.1 Display channels ........................................................ 11

4.2 Adjustment channels .................................................. 13

5. Troubleshooting ......................................................... 20

5.1 Various ...................................................................... 21

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 personnel

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 i nformat ion symbol.

Î Arrows indicate instruction steps that should be carried

out.

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.

Î Make sure the controller as well as the system

are not exposed to strong electromagnetic ﬁelds.

0.4" / 11 mm

0.5" / 13 mm

Overview

• System-monitoring-display

• Up to 4 Pt1000 temperature sensors

• Semiconductor relay for pump speed control

• Energy metering

• VBus

• Function control

• Control of the system by ServiceCenter software possible

• User-friendly operation

• Housing with outstanding design

• Extra-low power consumption

Included with the SOM 6 plus:

1 × SOM 6 plus

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 visua lization, 16-segment display, 7-segment display, 8 symbols for system status and operating control lamp

2.6"

66 mm

1.1" 28 mm

6.8" 172 mm

4.3"

110 mm

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, pump speed control, drainback option and energy metering.

Inputs:

for 4 Pt1000 temperature sensors

Output: 1 semiconductor relay

Bus: VBus

Power supply: 100 ... 240 V~

6.1" 155 mm

1.9" / 47 mm

Standby power consumption: < 1 W

Switching capacities:

R1: 1 (1) A 100 ... 240 V~ (semiconductor relay)

1. Installation

104 mm

1.1 Mounting

display

WARNING! Electric shock!

Opening the housing will expose live parts!

Î Switch off power supply and disconnect

the device from power supply before opening the housing!

cover

cable conduits with strain relief

5.1“

130 mm

lower fastening

upper fastening

fuse 4A

4.1“

push button

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 doublepole switch with contact gap of at least 0.12" [3 mm].

Route sensor cables and power supply cables separately.

Î Unscrew the cross-head screw from the cover and remove

it along with the cover from the housing

Î Mark the upper fastening point on the wall and drill

Î 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 through the hole in the terminal box (centers 5.1" [130 mm])

Î Drill and insert the lower wall plug

Î Fasten 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 connection”

Î Place the cover back onto the housing

Î Fasten the cover by means of the cross-head screw

1.2 Electrical connection

VBus

ground terminal

ATTENTION! ESD damage!

fuse

Electrosta tic discharge can lead to damage to electronic components!

Î Take 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

load terminalssensor terminal

power supply terminals

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

auxiliary relays or valves are connected.

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.

The controller is equipped with a semiconductor relay, to which a load such as a pump, a valve etc. can be connected:

• Relay 1

18 = conductor R1 17 = neutral conductor N 13 = ground conductor

1 (1) A (100 ... 240) V~

Grounding and load terminals

Temp. Sensor

Pt1000

S1 S2 S3

1 2

3 4 5 6

Sensor terminals S1 ... S4

7 8

The power supply is to be carried out at the terminals:

19 = neutral conductor N 20 = conductor L

LNR1N

20191817141312

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.

1.3 Data communication/ Bus

VBus

connection terminals

The controller is equipped with a 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 VBus® modules can be connected via this data bus.

By means of a DL2 datalogger or an interface adapter, the controller can be connected to a PC or a computer network.

1.4 Terminal allocation

The controller calculates the temperature difference between collector sensor S1 and tank sensor S2. If the difference is larger than or identical to the adjusted switch - on temperature difference (DT O), the solar pump will be operated by R1, and the tank will be loaded until the switch-off temperature difference (DT F) or the maximum tank temperature (S MX) is reached.

Sensors S3 and S4 ca n opt i o n a l l y be connected for measurement purposes. If energy metering (OHQM) is activated, sensor S4 has to be connected as return sensor.

S4 / TR

Display Channels

Channel Description Terminal Page

INIT FLL STAB COL x Temperature collector S1 12 TST x Temperature tank S2 12 S3 x Temperature sensor 3 S3 12 S4 x Temperature sensor 4 S4 12 TR x* Temperature return sensor S4 12 n % x Pump speed R1 R1 13 hP x Operating hours R1 R1 13 kWh x* Heat quantity kWh - 13 MWh x* Heat quantity MWh - 13

ODB initialization active - 12

ODB ﬁlling time active - 12

ODB stabilization in progress - 12

S4/TR

Drainback system layout

exemplary

Adjustment Channels

Channel Description Factory setting Page

DT O x Switch-on temperature difference 12.0 °Ra [6.0 K] 14 DT F x Switch-off temperature difference 8.0 °Ra [4.0 K] 14 DT S x Nominal temperature difference 20.0 °Ra [10.0 K] 14 RIS x Rise control 4 °Ra [2 K] 14 nMN x Minimum pump speed 30 % 14 S MX x Maximum tank temperature 140 °F [60 °C] 15

EM x

OCC x Option collector cooling CMX x* Maximum collector temperature

Emergency temperature collector 270 °F [130 °C] 15 Emergency temperature collector if ODB is activated: 200 °F [95 °C] 15

OFF 16

230 °F [110 °C] 16 OSYC x Option system cooling OFF 16 DTCO x* Cooling switch-on temperature difference DTCF x* Cooling switch-off temperature difference

40.0 °Ra [20.0 K]

30.0 °Ra [15.0 K]

16 OSTC x Option tank cooling OFF 17 OHOL x* Option holiday cooling OFF 17 THOL x* Holiday cooling temperature 110 °F [40 °C] 17 OCN x Option minimum limitation OFF 17 CMN x* Minimum collector temperature 50 °F [10 °C] 17 OCF x Option antifreeze OFF 17 CFR x* Antifreeze temperature 40.0 °F [4.0 °C] 17 OHQM x Option energy metering OFF 18 FMAX x* Maximum ﬂow 6.0 l 18 MEDT x* Antifreeze type 1 18 MED% x* Antifreeze concentration (only if MEDT = propylene or ethylene) 45 % 18 ODB x Drainback option OFF 19 tDTO x* ODB switch-on condition - time period 60 s 19 tFLL x* ODB ﬁlling time 5.0 min 19 tSTB x* ODB stabilization time 2.0 min 19 MAN x Manual operation R1 Auto 20 LANG x Language En 20 UNIT x Temperature unit °C 20 RESE x Reset - back to factory defaults 20

W0020100 Version number

Legend:

Symbol Speciﬁcation

x Channel is available

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

2. Operation and function

2.1 Push buttons

operating control lamp

backward

(selection / adjustment mode)

2.2 System monitoring display

SET

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.

forward

Î Scroll through the display channels by pressing buttons

1 and 2

Accessing the adjustment channels:

Î Scroll 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,

indicated to the right of the channel name.

Î Press button 3 in order to access the adjustment mode

starts ﬂashing.

Î Adjust the value using buttons 1 and 2 Î Briefly press button 3,

permanently appears,the

adjusted value will be saved.

The system monitoring display consists of three blocks: channel display, tool bar and system screen.

The channel display consists of 2 lines. The upper line is an alpha-

system monitoring display

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 temperature differences are indicated in K or °Ra respectively.

channel display

The additional symbols of the tool bar indicate the current system status.

Status standard ﬂashing

relay 1 active

maximum tank temperature exceeded

tool bar

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 1 OFF

sensor defective

+ 16 hidden pages