De Dietrich DIETRISOL TRIO DT 250 - TRIO DT 350 User guide

Brand: De Dietrich

Model: DIETRISOL TRIO DT 250 - TRIO DT 350

Category: Water heaters & boilers

Type: User guide

TRIO DT 250 - TRIO DT 350

Solar domestic hot water tanks

DIETRISOL

User Guide

300028005-001-05

TRIO DT 250 - TRIO DT 350 16/07/2015 - 300028005-001-05

Contents

1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.1 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.2 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

1.3 Liabilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

1.3.1 Manufacturer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

1.3.2 Installer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.1 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.1.1 Symbols used in the manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

3 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

3.1 Homologations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

3.1.1 Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

3.1.2 Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

3.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

3.3 Main parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

4 Setting the DHW calorifier outlet temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

4.1 Programming and setting the electrical back-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

4.2 Setting the thermostatic mixing valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

5 solar regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

5.1 General description of how the unit operates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

5.2 Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

5.3 Adjustment keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

5.4 Measured values and adjustment parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

6 Checking and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

6.1 Solar installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

6.2 Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

6.2.1 Magnesium anodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

6.2.2 Safety valve or safety unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

6.2.3 Descaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

6.2.4 Casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

6.2.5 Vent device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

6.3 Solar circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Warranty certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

7 Appendix - Information on the Ecodesign and Energy Labelling Directives. . . . . . . . . . . . . . . . . . . . . . . .20

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1 Safety instructions

1.1 General safety instructions



Danger

This appliance can be used by children aged

from 8 years and above and persons with

reduced physical, sensory or mental capabilities

or lack of experience and knowledge if they have

been given supervision or instruction

concerning use of the appliance in a safe way

and understand the hazards involved. Children

shall not play with the appliance. Cleaning and

user maintenance shall not be made by children

without supervision.



Allowance must be made for a means of

disconnection in the fixed pipes in accordance

with the regulations on installations.



If a power cord is provided with the appliance

and it turns out to be damaged, it must be

replaced by the manufacturer, its after sales

service or persons with similar qualifications in

order to obviate any danger.



Draining the appliance:

` Turn off the domestic cold water inlet

` Open a hot water tap on the installation

` Open a safety unit valve

` When the water stops flowing, the appliance has

been drained



Respect the maximum water inlet pressure to

ensure correct operation of the appliance,

referring to the chapter "Technical

Specifications".



Any operation on the installation must be

performed by a qualified technician respecting

professional regulations and in accordance with

this document.



Before any work, switch off the mains supply to

the appliance. Protect the installation against

any unwanted restarts.



Solar installations must be earthed to protect

them against lightning.



Operation of the thermostatic mixing valve on

the solar hot water tank outlet must be checked

on commissioning of the solar system.



Pressure limiter device:

` The pressure limiter device (safety valve or safety

unit) must be operated regularly in order to clear out

any limescale deposits and ensure that it is not

blocked

` The pressure limiter device must be connected to

a discharge pipe

` As water may flow from the discharge pipe, it must

be kept open to the air, in a frost-free environment,

in a continuous downward gradient

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1.2 Recommendations



.Heating water and domestic water must not

come into contact with each other. The

circulation of drinking water must not be done in

the exchanger but only in the tank.



Insulate the pipes to reduce heat losses to a

minimum.



Only remove the casing for maintenance and repair

operations. Put the casing back in place after

maintenance and repair operations.

We recommend installing an EC175 package on the

collector sensor.

The installation must comply in all matters to the

standards and rules which govern the work and

interventions in individual and collective homes, and

other constructions.

France: DTU 65.12, NF P50-601, NF 12976-2.

Service the appliance regularly to ensure that it operates

correctly. Contact a qualified professional or take out a

maintenance contract for the annual servicing of the

appliance.

As the heat transporting fluid leaks much more easily than

water, carry out a visual check on the tightness of all

fittings and gaskets after a few hours' operation at normal

operating pressure.

To take advantage of the guarantee, no modifications

must be made to the appliance. The choice of

components for the solar system and their installation

must follow the instructions in this manual.



Never remove or cover labels and rating plates

affixed to the appliance. Labels and rating plates

must be legible throughout the entire lifetime of the

appliance. Immediately replace damaged or illegible

instruction or safety labels.

1.3 Liabilities

1.3.1 Manufacturer's liability

Our products are manufactured in compliance with the

requirements of the various applicable European

Directives. They are therefore delivered with 1 marking

and all relevant documentation.

In the interest of customers, we are continuously

endeavouring to make improvements in product quality.

All the specifications stated in this document are therefore

subject to change without notice.

Our liability as the manufacturer may not be invoked in

the following cases:

` Failure to abide by the instructions on installing the

appliance

` Failure to abide by the instructions on using the

appliance

` Faulty or insufficient maintenance of the appliance

1.3.2 Installer's liability

The installer is responsible for the installation and

commissioning of the appliance. The installer is required

to observe the following instructions:

` Read and follow the instructions given in the

manuals provided with the appliance

` Install the appliance in acordance with the legislation

and standards currently in force

` Perform the initial start up and carry out any checks

necessary

` Explain the installation to the user

` If a maintenance is necessary, warn the user of the

obligation to check the appliance and maintain it in

good working order

` Give all the instruction manuals to the user

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2 About this manual

2.1 Symbols used

2.1.1 Symbols used in the manual

In these instructions, various markings and pictograms are used to

draw your attention to particular information. In so doing, De Dietrich

Thermique S.A.S wishes to safeguard the user's safety, obviate

hazards and guarantee correct operation of the appliance.



Danger

Risk of a dangerous situation causing serious physical

injury.



Warning

Risk of a dangerous situation causing slight physical

injury.



Caution

Risk of material damage.



Specific information.

Reference

Refer to another manual or other pages in this instruction

manual.

` DHW: Domestic hot water.

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3 Technical specifications

3.1 Homologations

3.1.1 Certifications

 NF certification

3.1.2 Directives

 Compliance of design and manufacture

This product conforms to the requirements of european directive 97 /

23 / EC, article 3, paragraph 3, on pressure equipment.



Electrical compliance / Marking

This product complies to the requirements to the european directives

and following standards:

• 2006/95/EC Low Voltage Directive

Reference Standard: EN 60.335.1

Reference Standard: EN 60.335.2.21.

2004/108/EC Electromagnetic Compatibility Directive

Reference Standards: EN 50.081.1 / EN 50.082.1 / EN 55.014.

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3.2 Technical data

DIETRISOL

TRIO DT 250

DIETRISOL

TRIO DT 350

Maximum operating temperature

Solar exchangers °C 110 110

Boiler heat exchanger °C 110 110

tank °C 90 90

Maximum operating pressure Mpa (bar) 0.7 (7) 1 (10)

Maximum operating pressure in accordance with W/TPW

(1)

Mpa (bar) 0.6 (6) 0.6 (6)

Water content

Solar exchangers litres 8 7.2

Boiler heat exchanger litres 4.3 4.9

tank litres 247 350

Surface area

Upper solar heat exchanger

0.48 0.48

Lower solar heat exchanger

0.86 0.96

Boiler heat exchanger

0.64 0.72

Operation with boiler back-up

Top up volume litres 105 127

Solar volume litres 142 223

Power exchanged (2) (3) kW 21 23

Operation with electrical back-up

Top up volume litres 130 160

Solar volume litres 117 190

Output of the electrical back-up kW 2.4 3

Back-up volume heating time (from 15 to

60°C)

h 2h50 2h50

Vecs 40 (5) (6)

Domestic hot water storage temperature:

55 °C

litres 355 420

Vecs40 (5) (6)

Domestic hot water storage temperature:

60 °C

litres 385 450

Continuous output

∆T = 35 K (2) (3)

l/h 515 565

Flow rate for 10 minutes where

∆T = 30 K (on make-up

volume) (2) (4)

l/10 mm 190 230

Maintenance consumption kWh/24h 2.20 2.7

Cooling constant Cr Wh/lKj 0.22 0.19

(1) Swiss Directives

(2) Domestic cold water input at 10°C - Primary inlet temperature at 80 °C

Values measured with a wall-mounted boiler

(3) Domestic hot water temperature: 45 °C

(4) Domestic hot water temperature: 40 °C

(5) Domestic cold water inlet 15 °C

(6) Values measured only on the back-up volume

Domestic hot water load setting: 60 °C

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3.3 Main parts

Dietrisol TRIO DT is a high performance solar DHW tank/calorifier

designed to be connected to Dietrisol NEO or POWER solar

collectors and an De Dietrich central heating boiler.

It is designed in such a way as to be able to cope with a solar collector

surface area of up to 4.5 m

(DT 250) and 6.5 m

(DT 350) under the

conditions set out in the chapter "Hydraulic Connection Primary Solar

Circuit".



tank

The high quality steel tank is lined with food standard quality

vitrified enamel, which protects it from corrosion and preserves

all the qualities of the domestic water.

The Dietrisol TRIO DT tank is fitted with 2 heat exchangers per

zone for solar heating and one heat exchanger for

supplementary heating by means of a fuel oil or gas boiler.



Protection against corrosion

The tank is also protected from corrosion by two magnesium

anodes which must be inspected every 2 years and replaced if

necessary.



Heat exchanger

The thermal exchanger welded into the tank is made of smooth

piping, the inside of which, which is in contact with the domestic

water, is enamelled.



Insulation

The tank is strongly insulated with high strength rigid

polyurethane foam with no chlorofluorocarbons (CFC), 50 mm

thick to minimise heat loss.



Casing

The outside casing is made of painted steel sheeting.

The top and side covers are made of ABS.



Solar station

The solar heating pump unit comprises the solar circuit safety

unit, a pressure and temperature gauge and a flowmeter to

visualise circulation of the solar fluid between the collectors and

the DHW tank. An expansion vessel is connected to the solar

unit; it is used to compensate for the expansion of the solar fluid

in which the temperature varies between 0 and 150°C.



Sol Plus TRIO regulator

The control system is the solar system's brain; it makes the solar

heating pump run at variable speeds according to the difference

in temperature between the bottom of the DHW tank and the

solar collectors. The control system manages the set point

temperature (temperature to be attained in the DHW tank),

overheating and nighttime cooling. The control system also

displays the various operating modes, the temperatures in the

collectors and in the bottom of the DHW tank, as well as

signalling any malfunctions.

Pressure gauge - Primary solar circuit

Safety control unit for the solar circuit (6 bar)

Blue thermometer (tank solar heat exchangers outlet)

Red thermometer (tank solar heat exchangers inlet)

Primary solar circuit pump

Manual bleed degasser

2-position 3-way directional valve

Sol Plus TRIO regulator

8 l/6 bar expansion vessel, 2-bar pre-load

Automatic connection for expansion vessel

Primary solar circuit filling and draining device

Magnesium anode

Electric heating resistance

Magnesium anode

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4 Setting the DHW calorifier outlet temperature

4.1 Programming and setting the electrical back-up

The temperature of the volume of water heated by the electrical

resistor is set by the installer on commissioning of the installation

according to the size of the home.

Using the programming device installed in the electrical panel, it is

possible to adjust the volume of water heated to 40°C by the resistor

in two ways:

` By forcing contunuous heating by the resistor (off-peak hours

contact) for significant unforeseen needs.

` By programming the heating time outside off-peak periods (2

hours maximum according to the DHW volume at 40°C

required) to compensate for the lack of sunshine in winter, for

example. The programmed period outside off-peak hours must

preferably be between 12 h and 18 h.

4.2 Setting the thermostatic mixing valve

28. Domestic cold water inlet

57. DHW tank domestic hot water outlet

The mixing valve is set in the factory for a DHW outlet temperature of

50°C (position 4). To lower this temperature, remove the top cover

and turn the wheel anti-clockwise. In position 1, the outlet

temperature is lowered to 35°C.

C003732-B

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5 solar regulator

Always fitted to installation type 1 (Parameter ANL 1).

See next page (Start-up).

5.1 General description of how the unit operates

In automatic mode, the regulator operates in accordance with the

following principles:

` The sun's irradiation heat the transfer fluid in the collector. For

the regulation process to be triggered, a minimum temperature

of 30 °C is required in the collector and there must be a

temperature difference of 10 K by comparison with the tank.

` During the self-calibration phase that follows (adjustment

parameter tu, factory setting: 3 minutes), the solar pump (relay

1) operates at full speed (100 %).

` Subsequently, the solar pump regime is calculated dynamically

depending on a difference between the reference temperature

(parameter DT, factory setting 20 K) and the calorifier

temperature.

` When the zonal reversal temperature is reached in the

collectors (adjustment parameter SZ, factory setting 55°C), the

relay R2 switches the reversal valve to the upper zone in the

calorifier. The user therefore has immediate access to domestic

hot water at the set temperature.

` When the zonal reversal temperature is reached (adjustment

parameter SZ, factory setting 55°C), the set reference

temperature difference is lowered from 20 K to 10 K.

` Depending on the heat available, the system heats up the solar

tank and cuts off when the tank storage temperature is reached

(adjustment parameter SX, factory setting: 60 °C).

` When the temperature in the collectors reaches the maximum

value (adjustment parameter CX, factory setting 100°C), the

solar pump is triggered to cool the collectors. The pump

continues to operate until the temperature in the collectors is

lower than 5 K at parameter CX and/or the maximum storage

temperature (85°C) is reached in the hot water storage tank. As

soon as the temperature in the collectors drops below the

temperature in the calorifier, the calorifier is cooled down to its

set temperature. The installation is thus protected against

overheating and repeated stoppages, allowing thus the

prolonged absence of the user even in the summer period.

` The amount of heat transferred from the collectors to the tank

is displayed as parameter AH. The value is cumulative and is

constantly updated.

` The regulator (installation 2- ANL2 with heating back-up)

includes an additional function: A temperature sensor S3 is

located on the heating return.

- If the heating return temperature is equal to or greater than the

temperature of the solar tank, heating return is direct to the boiler.

- If the temperature in the solar tank is higher than the heating

return temperature, heating return passes via the solar tank. The

energy coming from the sun's rays or from a biomass boiler is thus

exploited to heat the home.

Installation 1

Installation 2

5.2 Start-up

%

If the temperature in the solar collectors is higher

than 130°C, the control system operates in safety mode.

Wait until the evening before start-up or cool down (cover)

the solar collectors.

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Switch on the device. When initialisation is complete, the regulator

changes to automatic mode. The factory settings for this mode give

optimum performance with most installations.



The regulator is configured in the factory for installation type 1

(parameter ANL=1).

If special conditions make it necessary to change the settings, the

corresponding adjustment parameters can be reset.

Installation 1

Installation 2

5.3 Adjustment keys

The regulator is controlled by the 3 keys only located below the

display.

The down key is used to go to the next menu or to increase the

settings values.

The up key has the opposite effect.

The adjustment parameters are displayed after the measured values.

To access these parameters, hold down the down key for 2 sec. in

the TC parameter. When the display shows an adjustment

parameter, the word SET appears. To set the value displayed, press

the middle button SET.

1. Select the desired channel with the up and down keys.

2. Press the SET key: The word SET flashes.

3. Set the value with the up and down keys.

4. Press the SET key: The set value is stored. The word SET stops

flashing.

B000143-A

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5.4 Measured values and adjustment parameters



The regulator has a safety system that cuts off the tank at

temperatures of over 80°C.

Channel Abbreviation Range Increment Factory setting

Collector temperature

TC [-50.0 ... 250.0] °C - -

Calorifier temperature

TS [-50.0 ... 250.0] °C - -

Amount of heat

kWh [0 ... 9999] kWh - -

Pump regime

PC [0 ... 100] % - -

Self-calibration time

tc [0 ... 5] minutes - -

Return temperature

TR -50...250°C - -

Additional temperature

TM -50...250°C - -

Type of installation

ANL

Installation 1

Installation 2

- Installation 1

Temperature difference enabling the passage of the heating

return via the solar tank

DO [0.5 ... 19.5] K 0.1 6

Temperature difference enabling heating return directly to the

boiler

DF [0.4 ... 19.5] K 0.1 4

Reference temperature difference

DT [10 ... 20] K 0.1 20

Zone changeover temperature (tank)

SZ [20 ... 80] °C 0.1 55

Set temperature of the solar calorifier

SX [20 ... 80] °C 0.1 60

Maximum collector temperature

CX [100 ... 125] °C 0.1 100 °C

Self-calibration phase

tu [1 ... 5] minutes 1 3

Pump minimum speed

PN [20 ... 100] % 1 30

Pump command mode

POMP OnOF / PuLS / PSOL PSOL

Tubular solar collector function

FT [0 ... 1] 1 0

Maximum flow rate

Fx [0 … 20] l/min 0.1

Installation 1: 6.7

Installation 2: 4.2

Manual mode

MM [0 ... 4] 1 4

Software version

VN - - 2.00

Measured values

Adjustment parameter

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 Measured value TC - Collector temperature

The value TC shows the temperature in °C given by the collector

sensor in real time.



Measured value TS - DHW sensor temperature

The value TS shows the temperature in °C given by the tank sensor

in real time



Measured value kWh - Amount of heat

The value kWh shows in kWh the total amount of heat produced by

the installation since the regulator was put into service.



The quantity of heat (kWh value) can only be used for checks

carried out for personal reasons.



Measured value tc - Self-calibration time

The value tc shows the self-calibration phase time remaining in

seconds. During the self-calibration phase, the pump operates at full

speed (100 %); its speed is only controlled after the self-calibration

phase.



Measured value TM - Additional temperature

An optional additional temperature sensor can be connected to

terminals 7 and 8. For example: Temperature in the top of the

calorifier.



Adjustment parameter ANL -Type of installation

The adjustment parameter ANL is used to select the following

installation configurations:

ANL 1 = Installation 1:

- Preparation of domestic hot water using a DIETRISOL TRIO

calorifier.

- Preparation of domestic hot water using a tank with 2 exchangers

connected to the solar circuit.

ANL 2 = Installation 2:

Solar installation for the preparation of domestic hot water with a DC

mixed calorifier and for heating back-up with temperature control on

the heating return circuit. The temperature control on the heating

return circuit prevents the boiler having to maintain the temperature

of the back-up volume in the calorifier in the event of prolonged

absence of sunshine.



Adjustment parameter DO - Temperature

difference enabling the passage of the heating

return via the solar tank

Adjustment range: 0.5 ... 19.5 K

Factory setting: 6 K

The parameter DO is used to set the temperature difference above

which heating return is directed via the 3-way valve to the solar tank.

Heating return thus passes via the solar tank if the solar tank

temperature is higher by at least 6°C than the heating return

temperature.



If the parameter ANL is set to 1 (installation 1), the parameter

DO is deactivated



Adjustment parameter DF - Temperature

difference enabling heating return directly to the

boiler

Adjustment range: 0.4 ... 19.5 K

Factory setting: 4 K

The parameter DF is used to set the temperature difference below

which heating return is directed from the 3-way valve directly to the

boiler. The solar energy stored in the solar tank is insufficient to

reheat the heating return. Heating return is thus directed directly to

the boiler if the solar tank temperature is lower by at least 4°C than

the heating return temperature.



If the parameter ANL is set to 1 (installation 1), the parameter

DF is deactivated

TRIO DT 250 - TRIO DT 350 16/07/2015 - 300028005-001-05

 Adjustment parameter DT - Reference

temperature difference

Adjustment range: 10 ... 20 K

Factory setting: 20 K



Switching-on difference: Non-adjustable value 10 K

Switching-off difference: Non-adjustable value 5 K

The regulator reads the temperatures measured by sensors S1 (TC)

and S2 (TS) and compares the resulting temperature difference with

the switching-on difference which is preset to 10 K. Regulation is

activated when the temperature difference ∆T is equal to or greater

than the preset value. The display shows . When the value falls

below the preset 5 K switching-off difference, the regulator switches

off. The regulator tries to achieve a temperature difference of 20 K

(factory setting) between the collector and the tank to produce high

temperature hot water as rapidly as possible. To do this, it uses

dynamic speed control.



Adjustment parameter SZ - Zone changeover

temperature

Adjustment range: 20 ... 80 °C

Factory setting: 55 °C

If the temperature in the collectors reaches value SZ, the relay R2

closes.

If the temperature in the collectors is lower than value SZ, the arrow

flashes.

If the temperature in the collectors is higher than value SZ, the arrow

flashes.



We advise you to set the domestic hot water booster

temperature to 50°C. If the customer wants a higher

temperature, parameter SZ will have to be changed. SZ is

set to 55°C in the factory and must always be 5K higher

than the DHW booster circuit temperature setting(s).

If the domestic hot water boiler circuit is set at more than

50°C, SZ must be adjusted to 5K above this DHW circuit

temperature setting.

If the booster is electric, the resistance thermostat must be

set at 50°C.



Adjustment parameter SX - Set temperature of the

solar calorifier

Adjustment range: 20 ... 80 °C

Factory setting: 60 °C



Maximum tank temperature (emergency cut-off): Non-

adjustable value 85 °C

The set temperature Sx is the desired temperature for the solar

calorifier.

If the maximum tank temperature is exceeded, tank heating is

interrupted to prevent damage due to overheating. The display

shows and (flashing).

The higher the set temperature for the calorifier, the greater the

energy stored. Setting to 60 ... 75°C is suitable for normal use with

daily draw-offs.

In the event of prolonged absences (weekend, holidays):

- Reduce the calorifier temperature to 50°C

- Turn off the back-up (boiler or electrical resistance)

The installation is thus protected against overheating and the

longevity of the heat conducting fluid is conserved.

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 Adjustment parameter CX - Maximum collector

temperature

Adjustment range: 100 ... 125 °C

Factory setting: 100 °C



Maximum collector temperature (overheating safety): Non-

adjustable value: 130 °C.

If the temperature in the collector rises above its maximum

temperature CX even though the solar circuit is stopped (tank set

storage temperature reached), the solar pump (R1) switches on and

cools the collector (system cooling). In these conditions, the tank

temperature rises, but it can't exceed 85 °C (safety cut-off).

If the calorifier reaches the maximum temperature of 80°C (safety

shutdown), the regulator switches off the solar pump.



The collectors may reach a temperature of 160 ... 200°C, which

is normal for a solar installation.

The cooling functions allows heat to dissipate; the system thus

remains operational longer during hot summers. When it leaves the

factory, the collector's maximum temperature is preset to 100 °C;

however, it is possible to change this within the range 100 ... 125 °C.

If the maximum collector temperature is exceeded, the display shows

, and (flashing).



Adjustment parameter tu - Self-calibration phase

Adjustment range: 1 ... 5 minutes

Factory setting: 3 minutes

When the solar collector reaches a minimum temperature of 30 °C

and a preset temperature difference of 10 K from the tank

temperature, the regulator switches on the solar circulating pump at

full speed for the time period set by parameter tu. During this phase,

any air bubbles present in the solar collectors or the pipes are moved

to the complete solar station by the high circulation speed in the pipes

and eliminated by the Airstop system (manual bleed degasser).

After this phase, the regulator changes to "matched flow" mode. The

remaining self-calibration time is displayed with parameter tc.



Adjustment parameter PN - Pump minimum

speed

Adjustment range: 20 ... 100%

Factory setting: 30%

Adjustment parameter PN sets a minimum value for the solar pump

speed at the relay R1 output. The lower the pump regime, the lower

its flow.



Adjustment parameter POMP - Pump command

mode

Adjustment range: OnOF / PuLS / PSOL

Factory setting: PSOL

The POMP parameter is used to select the correct command

program for the solar pump, according to the type of pump

used.PSOL control (default setting) is designed for PWM solar-

controlled heating pumps, PuLS control for conventional frequency-

modulation heating pumps and OnOF control for "ON/OFF heating

pumps.



Adjustment parameter FT - Tubular solar collector

function

Adjustment range: 0/1

Factory setting: 0

0: no

1: yes

If the regulator detects a temperature rise in the collector of 2 K

compared to the last measurement, the solar pump runs at full speed

for 30 seconds to measure the current average temperature.

The measured temperature thus becomes the new reference

temperature.

If the measured temperature (new reference) then increases again

by 2 K, the solar pump starts again for 30 seconds.

The regulator switches automatically to solar heating mode if the

temperature difference between the collector and the calorifer

exceeds the switching-on temperature difference when the solar

pump is operating or the system is stopped.

If the collector temperature falls by 2 K while the system is stopped,

the tubular solar collector activation temperature is rechecked.

TRIO DT 250 - TRIO DT 350 16/07/2015 - 300028005-001-05

 Adjustment parameter Fx - Maximum flow rate

Adjustment range: 0 ... 20 l/min

Factory setting: Installation 1: 6.7 - Installation 2: 4.2

In order for the regulator to calculate the quantity of heat produced by

the installation (parameter kWh), input parameter Fx. The parameter

Fx is equal to the flow in litres per minute in the solar circuit.

Determine the value Fx using the following tables, according to the

configuration of the installation and the number or surface area of the

collectors. When the flow is input incorrectly, the display kWh will also

be incorrect.



The quantity of heat (kWh value) can only be used for checks

carried out for personal reasons.

` Flat solar collectors

` Tubular solar collectors



Adjustment parameter MM - Operating mode

Adjustment range: 0 ... 4

Factory setting: 4

For inspection and maintenance work, it is possible to operate the

regulator in manual mode. To operate the regulator in manual mode,

it is necessary to input parameter MM from the following table.

Solar panel

installation

Area

Number of

panels

Flow rate

l/h

Flow rate

l/min

3 ... 5 1 or 2 400 6.7

6 ... 8 3 or 4 300 5

8 ... 10 4 or 5 250 4.1

8 ... 10 2x2 750 12.5

12 ... 15 2x3 670 11.2

16 ... 20 2x4 450 7.5

12 ... 15 3x2 850 14.2

18 ... 23 3x3 800 13.4

24 ... 30 3x4 650 10.9

16 ... 20 4x2 1200 20

24 ... 30 4x3 850 14.2

C000191

Number of panels

Flow rate

l/h

Flow rate

l/min

minimum: 1x4 820 13.7

1x5 750 12.5

1x6 680 11.4

1x7 610 10.2

1x8 540 9

1x9 470 7.8

1x10 250 4.1

2x3 1400 20

2x4 1250 20

2x5 1100 18.4

2x6 950 15.9

2x7 750 12.5

2x8 600 10

2x9 540 9

2x10 400 6.7

MM1 R1 R2

0Open Open

1Closed Open

2Open Closed

3Closed Closed

4 automatic automatic

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6 Checking and maintenance

6.1 Solar installation

We recommend that you take out a preventive maintenance contract

to check the fluid level, antifreeze protection, pressure in the system,

leak test and general operation every year or every two years.

6.2 Tank

6.2.1 Magnesium anodes

The magnesium anode must be checked by a qualified professional

at least every 2 years.

6.2.2 Safety valve or safety unit

Have the condition of the anode checked after the first year. The

magnesium anode must be checked by a qualified professional at

least every 2 years.

6.2.3 Descaling

In hard water regions, it is advisable to ask the fitter to descale the

DHW tank exchanger once a year in order to maintain its level of

performance.

6.2.4 Casing

The casing of the DHW tank can be cleaned with soapy water.

6.2.5 Vent device

If the vent device is not used, the installer must check the seal on the

top vent connection.

6.3 Solar circuit

To check operation of the solar system, consult the display on the

control system.

The pressure in the solar circuit can be checked on the solar station's

pressure gauge. If the pressure shown is lower than 0.5 bar, call the

installer.



Never carry out work on the solar circuit yourself. Never

work on the safety valve yourself.

TRIO DT 250 - TRIO DT 350 16/07/2015 - 300028005-001-05

Warranty

You have just purchased one of our appliances and we thank you

for the trust you have placed in our products. Please note that your

appliance will provide good service for a longer period of time if it is

regularly checked and maintained. Your fitter and our customer

support network are at your disposal at all times.



Warranty terms

Starting from the purchase date shown on the original fitter's

invoice, your appliance has a contractual guarantee against any

manufacturing defect.

The length of the guarantee is mentioned in the price catalogue.

The manufacturer is not liable for any improper use of the appliance

or failure to maintain or install the unit correctly (the user shall take

care to ensure that the system is installed by a qualified fitter). In

particular, the manufacturer shall not be held responsible for any

damage, loss or injury caused by installations which do not comply

with the following:

- applicable local laws and regulations

- specific requirements relating to the installation, such as national

and/or local regulations

- the manufacturer's instructions, in particular those relating to the

regular maintenance of the unit

- the rules of the profession

The warranty is limited to the exchange or repair of such parts as

have been recognised to be faulty by our technical department and

does not cover labour, travel and carriage costs. The warranty shall

not apply to the replacement or repair of parts damaged by normal

wear and tear, negligence, repairs by unqualified parties, faulty or

insufficient monitoring and maintenance, faulty power supply or the

use of unsuitable fuel. Sub-assemblies such as motors, pumps,

electric valves etc. are guaranteed only if they have never been

dismantled.



France

The preceding dispositions are not exclusive of benefits for the

purchaser of the legal guarantee as stated in Civil Code articles

1641 to 1648.



Poland

Warranty conditions are included in the warranty card.



Switzerland

The application of the warranty is subject to the terms and

conditions of sale, delivery and warranty of the company marketing

our products.



Belgium

The preceding dispositions about the contractual guarantee are not

exclusive of profit if the need arises for the purchaser in Belgium of

the applicable legal dispositions on hidden defects.



Italy

The duration of our warranty is shown on the certificate delivered

with the appliance.

Our liability as manufacturer may not be invoked in respect of

incorrect use of the appliance, incorrect or insufficient maintenance

thereof, or incorrect installation of the appliance (you must

therefore ensure that installation and maintenance operations are

carried out respectively by a qualified professional and by an after

sales service company).

The legislation laid down by European Directive 99/44/EEC,

transposed by Legislative Decree No. 24 of 2 February 2002

published in O.J. No. 57 of 8 March 2002, continues to apply.



Russia

The foregoing provisions in no way affect the rights of the

consumer, which are guaranteed by the legislation of the Russian

Federation as regards hidden defects.

The terms and conditions of warranty and the terms and conditions

of application of the warranty are indicated on the warranty form.

The warranty shall not apply as regards the replacement or repair

of wearing parts under normal use. Such parts include

thermocouples, injection nozzles, flame control and ignition

systems, fuses and gaskets.



Turkey

Due to the laws and regulations the product life for this product is

10 years. During that time the producer and/or the distributor has

to provide after sales services and spare parts.



Other countries

The above provisions do not restrict the benefit of the legal laws

regarding hidden defects applicable in the buyer's country.

16/07/2015 - 300028005-001-05 TRIO DT 250 - TRIO DT 350

Warranty certificate

Date of purchase: .............................................................................

Name and address of the purchaser: ...............................................

..........................................................................................................

Tel.:...................................................................................................

Information on the appliance (to be found on the nameplate):

Model: ...............................................................................................

Serial number: ..................................................................................

Retailer's stamp:

Appendix

Information on the ecodesign and energy labelling directives

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De Dietrich DIETRISOL TRIO DT 250 - TRIO DT 350 User guide

Brand: De Dietrich

Model: DIETRISOL TRIO DT 250 - TRIO DT 350

Category: Water heaters & boilers

Type: User guide

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De Dietrich DIETRISOL TRIO DT 250 - TRIO DT 350 User guide

De Dietrich DIETRISOL TRIO DT 250 - TRIO DT 350 User guide

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