Buderus Logalux LTD550 Installation Instructions For Contractors

Brand: Buderus

Model: Logalux LTD550

Type: Installation Instructions For Contractors

Read carefully before carrying out installation and maintenance.

Installation instructions for contractors

DHW cylinder

Logalux

6 720 817 906-00.1T

LTN, LTD, LTH, LF 400...3000

L2TN, L2TD, L2TH, L2F 800...6000

L3TN, L3TD, L3TH, L3F 1200...2250

6 720 818 806(2015/12)GB

Table of Contents

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

Table of Contents

1 Explanation of symbols and safety instructions . . . . . . . . . . . . 3

1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Information on the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1 Determined use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.3 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.3.1 DHW cylinders in the LTN/LTH/LTD series . . . . . . . . . . . 4

2.3.2 DHW cylinders in the LF series . . . . . . . . . . . . . . . . . . . . . 4

2.4 Product data for energy consumption . . . . . . . . . . . . . . . 4

2.5 CE Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . 4

2.6 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.7 Tools, materials and assembly aids . . . . . . . . . . . . . . . . . 5

2.8 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.8.1 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.8.2 Dimensions and specifications for LT . . . . . . . . . . . . . . . 6

2.8.3 Dimensions and specifications for LF . . . . . . . . . . . . . . . 7

2.8.4 Safety limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4 Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5 Fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.1.1 Installation location . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.1.2 Positioning the DHW cylinder . . . . . . . . . . . . . . . . . . . . 10

5.2 Hydraulic connection . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5.3 Fitting the manhole cover gasket . . . . . . . . . . . . . . . . . 13

5.4 Fitting the thermal insulation, control unit

and immersion heaters . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.4.1 Fitting thermal insulation to the back panel . . . . . . . . . 14

5.4.2 Fitting the control unit . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.4.3 Fitting the immersion heater (accessories) . . . . . . . . . 17

5.4.4 Fit the thermal insulation to the front panel

and attach it with fixing straps . . . . . . . . . . . . . . . . . . . . 17

5.4.5 Fitting the thermal insulation, control units and

immersion heaters for double and triple cylinders . . . .18

6 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.1 Filling the DHW cylinder and checking for leaks . . . . . 20

6.2 District heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

7 Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

7.1 Shutting down the DHW cylinder . . . . . . . . . . . . . . . . . 21

7.2 Shutting down the DHW cylinder if there is a

risk of frost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

8 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

8.1 Operating the control unit . . . . . . . . . . . . . . . . . . . . . . 21

8.2 Control of steam-heated DHW cylinders . . . . . . . . . . . 21

9 Cleaning and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

9.1 Preparing the DHW cylinder for cleaning . . . . . . . . . . . 22

9.2 Cleaning the DHW cylinder . . . . . . . . . . . . . . . . . . . . . . 22

9.3 External current anode . . . . . . . . . . . . . . . . . . . . . . . . . 22

9.4 Maintenance intervals . . . . . . . . . . . . . . . . . . . . . . . . . . 22

10 Environmental protection/disposal . . . . . . . . . . . . . . . . . . . . 23

1 Explanation of symbols and safety instructions

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

1 Explanation of symbols and safety instructions

1.1 Key to symbols

Warnings

The following signal words are defined and can be used in this

document:

• NOTICE indicates that material damage may occur.

• CAUTION indicates that minor to medium personal injury may occur.

• WARNING indicates that severe to life-threatening personal injury

may occur.

• DANGER indicates that severe to life-threatening personal injury will

occur.

Important information

Additional symbols

1.2 Safety instructions

Installation, conversion

▶ Fire risk!

Soldering and welding can lead to a risk of fire, as the thermal

insulation is combustible.

▶ Only permit an authorised contractor to install or convert this DHW

cylinder.

Risk to life from electric current!

▶ Ensure that electrical work is only carried out by an authorised

electrician.

▶ Before beginning electrical work, isolate the heating system from the

mains power supply using the heating system emergency stop switch

and by removing the mains fuse. Secure it against unintentional

reconnection.

▶ Using suitable means, test that the mains voltage is disconnected.

▶ After the complete cylinder installation has been finished, carry out

an earth lead test in accordance with IEC/EN 60335 (also include

metallic screw connection fittings).

Function

▶ In order to ensure trouble-free operation, these installation and

maintenance instructions must be observed.

▶ Risk of scalding!

When the DHW cylinder is in operation, hot water temperatures

> 60 °C can occur.

Maintenance

▶ Customer recommendation: Arrange a maintenance and inspection

contract with an approved contractor. Have the DHW cylinder

inspected in accordance with tab. 9, page 22 and serviced if

required.

▶ Only use genuine spare parts!

Instructing the customer

▶ Inform the user about how to operate the DHW cylinder and draw

attention in particular to points concerning safety.

▶ Hand over the installation and maintenance instructions to the user

for safekeeping near the heating system.

Using the immersion heater

Observe the following points for operation with an immersion heater in

order to maintain corrosion protection and to adhere to the rules on

electrical safety:

▶ Operate a DHW cylinder with immersion heater and external

current anode only with a 30 mA fault current switch!

▶ Use only metal connection fittings in potable water heating systems

with plastic pipes.

▶ Never use plastic threads for immersion heaters.

▶ Only use immersion heaters fitted with insulation.

Warnings in this document are identified by a warning

triangle printed against a grey background.

Keywords at the start of a warning indicate the type and

seriousness of the ensuing risk if measures to prevent

the risk are not taken.

This symbol indicates important information where there is

no risk to people or property.

Symbol Explanation

▶ Step in an action sequence

 Cross-reference to another part of the document

• List entry

– List entry (second level)

Table 1

2 Information on the device

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

2 Information on the device

2.1 Determined use

The Logalux LTN/LTD/LTH/LF DHW cylinders are intended for heating

and storing potable hot water. The potable water supply must comply

with the requirements of the local Drinking Water Ordinance.

2.2 Scope of delivery

▶ Check that the delivery is complete and undamaged.

The scope of delivery varies depending on the product type:

• Storage cylinder unpackaged (up to 3 units)

• Control unit and mounting casing (up to 3 cartons)

• Cylinder size 400 l – 950 l:

– Thermal insulation made of 2 sections

– Split back panel

– Front panel with cover

– Fixing straps

• Cylinder size 1500 l – 3000 l:

– Thermal insulation made of 4 sections

– Split back panel

– Front panel with cover

– Fixing straps

2.3 Product description

The DHW cylinders in the Logalux LTX/LF series are supplied as single,

double and triple cylinders.

2.3.1 DHW cylinders in the LTN/LTH/LTD series

The DHW cylinders in the Logalux LTN/LTH/LTD series are available as

LTN for standard output, LTH for high output and LTD for steam

operation.

The main components of the Logalux LTN DHW cylinder are:

• Horizontal DHW cylinder with corrosion protection and thermometer

as single, double or triple cylinder

The cathodic corrosion protection consists of the hygienic Buderus

DUOCLEAN MKT thermal glaze and one (or 2, depending on the

version) external current anode(s) with integral control unit

potentiometer. The DHW cylinder is suitable for heating via district

heating or via boilers.

• Up to 3 control units (depending on the version) with thermometer

for activation of one (or 2, depending on the version) external

current anode(s)

• Smooth-tube heat exchanger (number depending on cylinder

capacity)

• Thermal insulation made of 2 (4) 90 mm thick, CFC-free high-

performance insulation sections

• If required, joining bracket to connect the individual cylinders

• Manhole opening for cleaning and inspections

2.3.2 DHW cylinders in the LF series

The main components of the DHW cylinders in the Logalux LF series are:

• Horizontal DHW cylinder with thermometer and corrosion protection

The DHW cylinder is suitable for heating with an external heat

exchanger.

The cathodic corrosion protection consists of the hygienic Buderus

DUOCLEAN MKT thermal glaze and one external current anode, as

well as a loading port for external heat exchanger.

• Up to 3 SPI 1010 control units (depending on the version), each one

for activation of an external current anode

• Thermal insulation made of 2 (4) 90 mm thick, CFC-free high-

performance insulation sections

• If required, joining bracket to connect the individual cylinders

2.4 Product data for energy consumption

The following product data satisfies the requirements of EU Regulations

No. 811/2013 and No. 812/2013, which supplement Directive

2010/30/EU.

2.5 CE Declaration of Conformity

The design and operation of the LTN, LTH, LTD and LF DHW cylinders

conform to the European Directives and supplementary national

requirements. Compliance is demonstrated by the CE marking.

You can view the Declaration of Conformity for the product on the

Internet at www.buderus.de/konfo or request a copy from your local

Buderus office.

2.6 Accessories

• Immersion heater

• Logamatic 4126 control unit and FM445 function module for

domestic hot water supply

• SLP heat exchanger set (only LF)

• Salt water resistant version, comprising an additional coating;

required where water conductivity is > 150 mS/m

Article number Product type

Cylinder

volume

[l]

Heat losses

[W]

Energy efficiency

class

Domestic hot

water supply

7 747 303 255 LF400 360.0 106.7 D

7 747 303 256 LF550 550.0 125.8 D

7 747 303 257 LF750 750.0 160.7 D

7 747 303 258 LF950 950.0 175.3 D

7 747 303 259 LF1500 1500.0 243.8 E

7 747 303 260 LF2000 2000.0 252.2 E

7 747 302 758 LTD400 360.0 106.7 D

7 747 302 759 LTD550 550.0 125.8 D

7 747 302 760 LTD750 750.0 160.7 D

7 747 302 761 LTD950 950.0 175.3 D

7 747 302 762 LTD1500 1500.0 243.8 E

7 747 303 213 LTD2000 2000.0 252.2 E

7 747 302 753 LTH400 360.0 106.7 D

7 747 302 754 LTH550 550.0 125.8 D

7 747 302 755 LTH750 750.0 160.7 D

7 747 3027 56 LTH950 950.0 175.3 D

7 747 302 757 LTH1500 1500.0 243.8 E

7 747 303 227 LTH2000 2000.0 252.2 E

7 747 302 748 LTN400 360.0 106.7 D

7 747 302 749 LTN550 550.0 125.8 D

7 747 302 750 LTN750 750.0 160.7 D

7 747 302 751 LTN950 950.0 175.3 D

7 747 302 752 LTN1500 1500.0 243.8 E

7 747 303 241 LTN2000 2000.0 252.2 E

Table 2 Product data for energy consumption

2 Information on the device

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

2.7 Tools, materials and assembly aids

In order to install the DHW cylinder, you need standard tools as used for

gas and water installations.

In addition to this, transport by crane or two pallet trucks may also be

useful.

2.8 Specifications

2.8.1 Connections

Fig. 1 LT/LF connections

AW DHW outlet

EK/EL Cold water inlet/drain

EW DHW inlet (external heat exchanger)

EZ Circulation

First external current anode

Second external current anode, from a cylinder capacity of 2000 l

RS Boiler return

VS Flow

MROH Test point for controller without auxiliary energy

EH Immersion heater (2, 3 or 4 heaters)

MW Test point for domestic hot water temperature

MSTB Test point for high limit safety cut-out

MTR Test point for temperature control

6 720 817 906-01.1T

To ensure that the cylinder can be drained quickly, use

the same connection diameter for the tee on the cold

water inlet and drain connector (EK/EL).

2 Information on the device

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

2.8.2 Dimensions and specifications for LT

Fig. 2 Dimensions of LT

Cylinder type 400 550 750 950 1500 2000 2500 3000

Individual cylinder capacity I 400 550 750 950 1500 2000 2500 3000

Diameter D Ø 650 800 800 900 1000 1250 1250 1250

Width B mm 810 1000 1000 1100 1200 1450 1450 1450

Length L mm 1600 1510 1910 1910 2405 2150 2570 2970

Height H

mm 830 1010 1010 1110 1210 1460 1460 1460

mm 1680 2030 2030 2230 2430 2930 2930 2930

mm 2530 3050 3050 – – – – –

Adjustable feet A

LT/L2T

mm 400 470 470 520 560 680 680 680

L3T

mm 600 700 700 – – – – –

mm 410 400 400 420 445 505 505 505

mm 535 470 865 820 1270 890 1310 1710

Cylinder flow Ø VS DN 50 50 50 50 65 80 80 80

mm 540 550 550 550 585 725 990 990

mm 1390 1570 1570 1670 1805 2195 2460 2460

mm 2240 2590 2590 – – – – –

Cylinder return Ø RS DN 50 50 50 50 65 80 80 80

mm 240 250 250 250 285 285 290 290

mm 1090 1270 1270 1370 1505 1755 1760 1760

mm 1940 2590 2590 – – – – –

Cold water inlet Ø EK DN R 1 1/2 R 1 1/2 R 1 1/2 R 1 1/2 R 2 R 2 R 2 1/2 R 2 1/2

mm 145 160 160 160 165 165 175 175

mm 995 1180 1180 1280 1385 1635 1645 1645

mm 1845 2200 2200 – – – – –

DHW circulation inlet Ø EZ DN R 1 1/4 R 1 1/4 R 1 1/4 R 1 1/4 R 1 1/2 R 1 1/2 R 2 R 2

mm 470 570 570 620 690 835 835 835

mm 1310 1590 1590 1740 1910 2305 2305 2305

mm 2160 2610 2610 – – – – –

Table 3 Dimensions and connections

6 720 817 906-02.1T

2 Information on the device

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

2.8.3 Dimensions and specifications for LF

Fig. 3 Dimensions of LF

DHW inlet Ø AB DN R 1 1/2 R 1 1/2 R 1 1/2 R 1 1/2 R 2 R 2 R 2 1/2 R 2 1/2

mm 705 860 860 960 1055 1300 1295 1295

mm 1555 1880 1880 2080 2275 2770 2765 2765

mm 2405 2900 2900 – – – – –

Weight, net

(incl. thermal insulation)

LTN kg 330 367 470 517 875 1145 1300 1460

LTH kg 363 400 520 567 957 1254 1436 1596

LTD kg 330 367 439 486 819 1068 1204 1364

L2TN kg 682 762 968 1066 1784 2331 2641 2961

L2TH kg 748 828 1068 1156 1948 2549 2913 3233

L2TD kg 682 762 906 1004 1672 2177 2449 2769

L3TN kg 1034 1157 1466 – – – – –

L3TH kg 1133 1256 1616 – – – – –

L3TD kg 1034 1157 1373 – – – – –

Cylinder type 400 550 750 950 1500 2000 2500 3000

Individual cylinder capacity I 400 550 750 950 1500 2000 2500 3000

Diameter D Ø 650 800 800 900 1000 1250 1250 1250

Width B mm 810 1000 1000 1100 1200 1450 1450 1450

Length L mm 1600 1510 1910 1910 2405 2150 2570 2970

mm 1355 1265 1665 1665 2160 1905 2325 2725

Height H

mm 830 1010 1010 1110 1210 1460 1460 1460

mm 1680 2030 2030 2230 2430 2930 2930 2930

mm 2530 3050 3050 – – – – –

Adjustable feet A

LF/L2F

mm 400 470 470 520 560 680 680 680

L3F

mm 600 700 700 – – – – –

mm 410 400 400 420 445 505 505 505

mm 535 470 865 820 1270 890 1310 1710

Table 4 Dimensions and connections

Cylinder type 400 550 750 950 1500 2000 2500 3000

Table 3 Dimensions and connections

6 720 817 906-03.1T

2 Information on the device

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

2.8.4 Safety limits

Loading port Ø AL DN 50 50 50 50 65 80 80 80

mm 240 250 250 250 285 285 290 290

mm 1090 1270 1270 1370 1505 1755 1760 1760

mm 1940 2590 2590 – – – – –

Cold water inlet Ø EK DN R 1 1/2 R 1 1/2 R 1 1/2 R 1 1/2 R 2 R 2 R 2 1/2 R 2 1/2

mm 145 160 160 160 165 165 175 175

mm 995 1180 1180 1280 1385 1635 1645 1645

mm 1845 2200 2200 – – – – –

DHW circulation inlet Ø EZ DN R 1 1/4 R 1 1/4 R 1 1/4 R 1 1/4 R 1 1/2 R 1 1/2 R 2 R 2

mm 470 570 570 620 690 835 835 835

mm 1310 1590 1590 1740 1910 2305 2305 2305

mm 2160 2610 2610 – – – – –

DHW outlet Ø AB DN R 1 1/2 R 1 1/2 R 1 1/2 R 1 1/2 R 2 R 2 R 2 1/2 R 2 1/2

mm 705 860 860 960 1055 1300 1295 1295

mm 1555 1880 1880 2080 2275 2770 2765 2765

mm 2405 2900 2900 – – – – –

Weight, net

(incl. thermal insulation)

LF kg 290 327 367 414 708 923 1022 1182

L2F kg 602 685 762 860 1450 1887 2085 2405

L3F kg 914 1040 1157 – – – – –

Cylinder type 400 550 750 950 1500 2000 2500 3000

Table 4 Dimensions and connections

NOTICE: Exceeding the limits can damage the cylinder!

▶ In order not to damage the DHW cylinder, observe

the limits given below for technical safety reasons.

Permitted maximum

values

Temperature

[ °C]

Operating pressure

[bar]

Heating water

1) Only Logalux LTN, LTH, LTD

160 16

Domestic Hot Water 95 10

Table 5 DHW cylinder safety limits

3 Regulations

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

3 Regulations

Standards and directives

Supplementary or other requirements (e.g. mains

connection requirements) may apply depending on the

installation location (e.g. in different countries or regions).

▶ Observe the country-specific or regional regulations,

directives and standards (e.g. those of the power supply

utility) during the installation and operation of the DHW

cylinder and immersion heater.

Germany

Installation and equipment of heating and DHW supply

systems

Electrical connection Product standards

DIN 1988-100: Technical Regulations for Drinking

Water Installations (TRWI)

DIN 4701: Regulations for calculating the heat demand

(heating load) of buildings

DIN 4708: Central water heating systems

DIN 4747-1: District heating systems - Part 1:

Technical safety equipment for substations, domestic

stations and domestic systems for connection to

district heating water networks

DIN 4751: Water heating systems

DIN 4753-1: Potable water heaters, potable water

heating systems and potable water cylinder heaters -

Part 1: Containers with a volume > 1000 l

DIN 18380: VOB

; heating systems and central water

heating systems

DIN 18381: VOB

); gas, water, and waste water

installation work within buildings

DIN 18421: VOB

; insulation work on technical

systems

AVB

Water

DIN EN 1717: Protection of potable water against

contamination ...

DIN EN 806-5: Technical rules for potable water

installations

DVGW W 551: Potable water heating systems and pipe

systems; technical measures to inhibit the growth of

legionella in new systems

Code of Practice W 553: Measurement of DHW

circulation systems ...

VDI 2036: Technical building systems with district

heating

Technical rules for steam (TRD)

Pressure Equipment Directive (DGRL)

German Health & Safety at Work regulation (BetrSichV)

1) VOB: German contract procedures for building work – Part C: General technical conditions of contract for building work (ATV)

2) Invitation to tender templates for building work in overground construction, particularly with regard to residential buildings

DIN VDE0100: Installation of

HV systems with rated voltages of

1000 V

VDE0190: Equipotential bonding of

electrical systems

DIN 18 382 VOB

: Electrical

cabling and wiring installations in

buildings

IEC/EN 60335: Safety of electrical

devices for household use and

similar purposes

DIN 4753: Water heaters and DHW heating systems for

potable water and heating water

DIN 4753, Part 3: Water heaters and water heating

systems for potable water and heating water; enamel

coating for corrosion protection on the water side;

requirements and testing

DIN 4753, Part 6: Water heating systems for potable

water and heating water; cathodic corrosion protection

for enamelled steel containers; requirements and

testing

DIN 4753, Part 7: Containers with a volume of

1000 l, requirements for the manufacture, thermal

insulation and corrosion protection

DIN 4753, Part 8: Thermal insulation of water heaters

of 1000 l rated content – Requirements and testing

DIN EN 12897: Water supply – Specification for

indirectly heated and unventilated DHW cylinders

Table 6 Technical rules for the installation of DHW cylinders (selection) in Germany

4 Transport

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

4 Transport

The DHW cylinder can be transported with a pallet truck or a crane.

Transport by crane

▶ Hook the lifting hooks on the cables into the two eyelets [1].

▶ Hook the lifting hook of the crane into the cable.

▶ Set the DHW cylinder down gently.

Fig. 4 Eyelets on the DHW cylinder

[1] Eyelets

5 Fitting

5.1 Installation

5.1.1 Installation location

5.1.2 Positioning the DHW cylinder

▶ Position the DHW cylinder on a level floor that has adequate load-

bearing capacity.

▶ Observe the minimum clearances in the installation location for

maintenance, fitting and repair ( Fig. 5).

▶ Ensure that the clearance from the top edge of the DHW cylinder to

the ceiling is not less than 500 mm.

▶ Align the DHW cylinder so that it is horizontal and stable.

Insert metal shims underneath if necessary.

▶ In the case of double and triple cylinders, fasten the storage cylinders

together before fitting the thermal insulation.

▶ In the case of triple cylinders, ensure that the cylinder feet are

secured.

Fig. 5 Minimum clearances

DANGER: Risk to life through falling load!

▶ Only use lifting cables that are in a faultless condition.

▶ Only hook the lifting hooks into the eyelets provided.

NOTICE: Risk of damage from inappropriate securing

during transport!

▶ Use only suitable means of transport for handling the

load.

NOTICE: Risk of system damage due to frost!

The system can freeze up during frost, if it is not in

operation.

▶ Only install the DHW cylinder in a frost-proof room,

or drain a cylinder that is not in use, if there is a risk

of frost.

Rated content Wall clearance

[l] A, [mm] B, [mm]

400...550 900 1100

750...3000 1200 1700

Table 7 Minimum clearances

> 1m

6 720 817 906-04.1T

5 Fitting

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

5.2 Hydraulic connection

So that later damage to the DHW cylinder is prevented:

▶ Use metal connectors in potable water heating systems with plastic

pipes.

▶ Use installation material that is temperature-resistant at 95 °C.

▶ Use only screw fittings, and with shut-off valves if required, for all

connection pipes to the cylinder.

▶ Install an air vent valve in the DHW line upstream of the shut-off valve.

▶ Install the drain provided by the customer to the bottom cylinder

connection.

▶ In order to facilitate blow-down, never install elbows in the drain

pipe.

▶ Fit all connection pipes in such a way that they are free of tension.

▶ Seal off all cylinder connections that are not used.

Fig. 6 Connection diagram for hydraulic connection

[1] Storage cylinder

[2] Air vent valve

[3] Shut-off valve with drain valve

[4] Pressure relief valve

[5] Non-return valve

[6] Shut-off valve

[7] DHW circulation pump

[8] Pressure reducer (if required)

[9] Test valve

[10] Non-return component

[11] Pressure gauge connector

[12] Drain

▶ If there is an arrangement of several DHW heaters, make the

connections for both domestic hot water and heating water in

parallel in accordance with the Tichelmann system ( Fig. 7,

page 12).

DANGER: Risk of fire from soldering and welding!

▶ As far as possible, carry out any soldering and welding

work before fitting the thermal insulation.

▶ Take appropriate safety measures when soldering and

welding, since the thermal insulation is combustible;

for example, cover the thermal insulation.

▶ Check the integrity of the thermal insulation after

completing work.

DANGER: Risk to health through contaminated water!

Fitting work carried out without due care for cleanliness

can result in contamination of the potable water.

▶ Install and equip the DHW cylinder hygienically and in

accordance with national standards and guidelines.

▶ Flush the DHW cylinder and pipework thoroughly with

potable water after fitting.

To ensure that the cylinder can be drained quickly, use

the same connection diameter for the tee on the cold

water inlet and drain connector (EK/EL).

5 Fitting

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

Fig. 7 Connection diagram for hydraulic connection with 2 water heaters

AW DHW outlet

EK Cold water inlet

EZ DHW circulation inlet

[1] Diaphragm safety valve, component-tested in accordance

with DIN 4753-1 (1 piece per cylinder, if these can be shut

off individually)

[2] Drain valve

[3] Shut-off device

[4] Air vent valve

[5] Shut-off valve with drain valve

[6] DHW circulation pump with timer

[7] Non-return valve

[8] Pressure reducer; if the line pressure is higher than 80 % of

the response pressure of the pressure relief valve

[9] Test valve

[10] Non-return component

[11] Pressure gauge connector in accordance with DIN 4753-1

< 1000 litres cylinder capacity; pressure gauge in

accordance with DIN 4753-1 > 1000 litres cylinder capacity

[12] Tee and drain valve (important for quicker flushing/draining)

[13] Temperature sensor; high limit safety cut-out with flow

temperature > 110 °C

[14] Temperature sensor for temperature controller

[17] Water filter

[18] Setting element

[19] Thermometers

[1...19] All parts provided by the customer.

Pressure relief valve (provided by the customer)

▶ Attach a notice with the following text to the pressure relief valve:

"Never close the discharge pipe. Water may escape for safety

reasons during heating."

▶ Design the cross section of the discharge pipe in such a way, that it at

least matches the outlet cross section of the pressure relief valve

( Tab. 8).

▶ Test the standby status of the pressure relief valve from time to time

by venting it.

Checking for leaks

▶ Check all connections and the cover of the inspection aperture for leaks.

6 720 817 906-05.1T

VHF

RHF

81011

Connection diameter

at least

Rated content of the

water vessel

Maximum

heat output

1) Output information in accordance with DIN 4708 in the case of Tv = 80 °C or steam positive pressure = 1 bar. Observe the relevant max. heating output for other flow

temperatures and steam pressures.

Series

I kW LT...N LT...H LT...D LF

DN20 200...1000 150 400...950 400...550

DN25 1000...5000 250 1500 750...950 400...1500 400...950

DN32 > 5000 1000 2000...3000 1500...3000 2000...3000 1500...3000

Table 8 Sizing the discharge pipe

5 Fitting

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

5.3 Fitting the manhole cover gasket

▶ Release the nuts and remove the manhole cover.

▶ Position the manhole cover gasket on the manhole cover.

The curved radius of the manhole cover and the formed radius of the

manhole cover gasket should lie precisely on top of each other.

Fig. 8 Fitting of manhole cover gasket

[1] Manhole cover gasket

[2] Manhole cover

Fig. 9 Manhole cover gasket positioned precisely on the manhole

cover

[1] Manhole cover gasket

[2] Manhole cover

▶ Insert the manhole cover with the manhole cover gasket into the

manhole and tighten it.

5.4 Fitting the thermal insulation, control unit and

immersion heaters

The thermal insulation consists essentially of the insulation around the

edge, plus the front and back panel sections.

With the exception of the covers for the front panel and back panel, all

thermal insulation sections are marked with numbers for better

definition ( Fig. 10).

Fig. 10 Numbering schedule for thermal insulation sections

6 720 817 906-36.1T

6 720 817 906-37.1T

We recommend fitting the thermal insulation only after

installation and leak test.

In the case of the 400 l cylinder size, the thermal insulation

consists of only 2 sections.

No fixing strap in the centre is required.

In the case of the 2000 l cylinder size and larger, a second

external current anode is fitted in the back panel (apart from

the LF series).

▶ Before fitting the thermal insulation sections C and D,

route the anode cable on the storage cylinder to the

control unit.

Fit the control unit and carry out all electrical work before

fitting the front panel.

6 720 817 906-06.1T

5 Fitting

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

5.4.1 Fitting thermal insulation to the back panel

The thermal insulation is shown fitted to a single cylinder.

▶ Remove the fabric plugs from the hole devices in the back panel.

Fig. 11 Removing the fabric plugs from the hole devices

▶ Lay the thermal insulation sections for the back panel onto the back

panel.

Fig. 12 Fitting the thermal insulation sections for the back panel

▶ Lay the bottom/back thermal insulation section ( Fig. 10, [1],

page 13) under the cylinder and insert the slits into the cylinder feet.

Fig. 13 Laying the thermal insulation section under the cylinder

▶ Push the top/back thermal insulation section ( Fig. 10, [2],

page 13) against the bottom section, so that the bottom hook locking

bracket latches into place.

Fig. 14 Push the top thermal insulation section against the bottom

thermal insulation section

▶ If required, attach the assembly aids.

Fig. 15 Attaching the assembly aids

▶ Wind the joined thermal insulation sections around the cylinder.

Fig. 16 Winding the thermal insulation around the cylinder

6 720 817 906-18.1T

6 720 817 906-16.1T

6 720 817 906-07.1T

6 720 817 906-19.1T

6 720 817 906-21.1T

6 720 817 906-20.1T

5 Fitting

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

▶ Join thermal insulation sections 1 and 2 ( Fig. 10, page 13) by

means of the top hook locking bracket.

Fig. 17 Joining the thermal insulation with hook locking bracket

▶ Attach thermal insulation sections 3 and 4 ( Fig. 10, page 13) in

the same way as sections 1 and 2 ( Fig. 10, page 13).

Fig. 18 Attach thermal insulation sections 3 and 4

( Fig. 10, page 10).

▶ Close the gaps on the bridge and feet with the fabric strips.

Fig. 19 Close the gaps with the fabric strips.

[1] Gap

[2] Fabric strips

▶ Attach the adhesive rosettes on the bridge/feet.

Fig. 20 Attaching the adhesive rosettes on the bridge/feet

5.4.2 Fitting the control unit

▶ Remove the recess cylinder of the cable hole from the thermal

insulation with a cutter blade.

Fig. 21 Removing the recess in the thermal insulation

6 720 817 906-22.1T

6 720 817 906-23.1T

6 720 817 906-32.1T

6 720 817 906-25.1T

6 720 817 906-26.1T

5 Fitting

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

▶ Fasten the mounting casing with 4 self-tapping screws.

Fig. 22 Screwing the mounting casing in place

▶ Route all cables and sensor leads from the control unit through the

cable hole to the sensor pocket and external current anode.

Fig. 23 Routing the cable through the cable hole

▶ Place the control unit in the mounting casing and screw it into place.

( Fig. 22, page 16).

Fig. 24 Fitting the control unit

▶ Screw the tab for the earth conductor ( Fig. 25, [1]) to the tab on

the storage cylinder.

▶ Push the blade terminal of the anode cable (fitted to control unit)

onto the lug of the external current anode ( Fig. 25, [2]).

▶ Route the temperature sensor, temperature controller and high limit

safety cut-out with a dummy into the sensor pocket ( Fig. 25, [3])

in the manhole cover and secure them with the threaded pin.

Fig. 25 Fitting the temperature sensor, temperature controller and

high limit safety cut-out

[1] Tab for earth conductor

[2] External current anode

[3] Sensor pocket

▶ Make the electrical connection in accordance with the wiring

diagram.

▶ Ensure that the cables and leads are routed correctly, e.g. under the

cover of the hook locking bracket.

▶ Connect the power supply.

▶ In the case of a cylinder size > 2000 l, attach the second anode as

follows ( Fig. 26).

Fig. 26 Making the electrical connection to the control unit

[1] Tab for earth conductor

[2] Second external current anode

6 720 817 906-11.1T

6 720 817 906-27.1T

6 720 817 906-11.1T

Connect the second external current anode (2000 l

cylinder size) in the same way.

6 720 817 906-09.1T

6 720 817 906-10.1T

5 Fitting

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

5.4.3 Fitting the immersion heater (accessories)

▶ If operating with an immersion heater, observe local regulations (e.g.

switch-on times).

▶ Connect the immersion heater with 2 rows of contactors to the

SPI 1030 and SPZ 1030 (2000 l) control units in accordance with

the wiring diagram.

▶ Unscrew the plug from the connector in the front panel of the

cylinder.

▶ Seal in the immersion heaters ( Fig. 27, [2], page 17) in such a

way, that the cable entry is arranged at the bottom.

▶ Route all the cables and sensor leads through the cable hole

( Fig. 23, page 23) in the thermal insulation section from the

control unit to the sensor pocket, external current anode and

immersion heaters.

▶ Make the electrical connection in accordance with the wiring

diagram.

▶ Ensure that the cables and leads are routed correctly.

▶ Further fitting of the control unit ( Fig. 24... 26, page 16)

Fig. 27 Cabling the immersion heaters

[1] Connections for immersion heaters

▶ Close the cable hole in the thermal insulation section with a flexible

foam plug.

▶ Connect the power supply.

▶ Place the control unit in the mounting casing and screw it into place.

( Fig. 24, page 16).

5.4.4 Fit the thermal insulation to the front panel and attach it

with fixing straps

▶ Check whether the external current anode and earth conductor are

connected.

▶ Fit the thermal insulation with manhole recess to the front panel.

Fig. 28 Fitting the thermal insulation for the front panel

▶ Attach the manhole cover.

Fig. 29 Attaching the manhole cover

DANGER: Risk to life from electric current!

▶ Before beginning electrical work, isolate the heating

system from the mains power supply using the

emergency stop switch and by removing the mains

fuse. Secure it against being switched on again

unintentionally.

The first row of contactors is switched by the temperature

controller, and the second row of contactors by the high

limit safety cut-out as required.

The casing of the immersion heaters can be rotated in every

position.

6 720 817 906-12.1T

In the case of the 400 l cylinder size, no thermal insulation

sections are required for the front panel.

6 720 817 906-28.1T

6 720 817 906-29.1T

5 Fitting

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

▶ Place the fixing straps around the front and back panels and tension

them.

Fig. 30 Tensioning the front and back panels

▶ Place the middle tensioning wheel around the front and back panels

in the same way and tension it, so that the position where they butt

together is covered.

Fig. 31 Placing the middle tensioning wheel around the front and back

panels

▶ Attach the cover of the hook locking bracket.

Fig. 32 Attaching the cover of the hook locking bracket

▶ Press the foam wedges into the feet.

Fig. 33 Pressing the foam wedges into the feet

5.4.5 Fitting the thermal insulation, control units and

immersion heaters for double and triple cylinders

▶ To ensure greater stability, screw 4 cylinder feet [2] to all triple

cylinders, using 2 screws [2] and nuts [3] for each foot.

▶ Fasten each foot to the floor with a screw and rawl plug.

Fig. 34 Fixing triple cylinders to the floor

[1] Screw

[2] Cylinder foot

[3] Nut

[4] Washer

[5] Connecting screw

▶ In the case of double and triple cylinders and in contrast to the single

cylinder, particularly close attention must be paid to the joining of the

storage cylinders and the arrangement of the different thermal

insulation sections.

▶ Align the bottom storage cylinder.

▶ Place the top storage cylinder with the cylinder feet onto the bridge

of the bottom storage cylinder in such a way, that the fastening holes

are exactly aligned.

6 720 817 906-30.1T

6 720 817 906-31.1T

6 720 817 906-34.1T

6 720 817 906-24.1T

5 Fitting

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

▶ Screw each cylinder foot and bridge together using 2 screws,

washers and nuts.

Fig. 35 Joining a double cylinder

[1] Top storage cylinder

[2] Bottom storage cylinder

[3] Connecting screw

[4] Washer

[5] Nut

[6] Foam wedges

[7] Wooden strip

[8] Fixing strap

▶ Fit thermal insulation sections according to their marking.

Fig. 36 Numbering of thermal insulation sections for double and triple

cylinders

▶ Carry out all further installation steps as with the single cylinder.

6 720 817 906-17.1T

6 720 817 906-33.1T

2 x 400...950 l 2 x 1500...3000 l

3 x 400...750 l

6 Commissioning

Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)

6 Commissioning

Initial commissioning must be carried out by a contractor.

6.1 Filling the DHW cylinder and checking for leaks

▶ Before commissioning, check all pipework connections and screw

fittings for leaks.

▶ After the cylinder has heated up and due to the associated pressure

rise, tighten the screws in the manhole cover by hand.

6.2 District heating

▶ Adjust the pump in a cylinder combination to the pump rate

corresponding to the continuous DHW output.

▶ Make this adjustment via an adjusting valve downstream of the

pump.

▶ If the adjustment is made at minimum flow temperature (summer

mode), open the temperature control valve fully (highest set value

setting on the thermostat).

▶ While making the adjustment, open the draw-off positions; the total

discharge volume must not however exceed the maximum DHW

output.

▶ Open the draw-off positions.

▶ Open the DHW shut-off valve [3].

▶ Adjust the discharge volume according to the continuous DHW

output.

▶ Mark the valve spindle position on the adjusting valve [5].

▶ Close the DHW shut-off valve [3].

▶ Heat the domestic hot water temperature in the stratification

cylinder up to 50 °C.

▶ Close the adjusting valve [5] to 50...70 %.

▶ Switch on the pump [6].

▶ Open the DHW shut-off valve [3] to the factory default.

▶ Measure the discharge volume.

▶ Adjust the temperature control valve [4] to its highest set value.

▶ Measure the domestic hot water temperature at the DHW outlet or

draw-off positions.

▶ If the domestic hot water temperature drops (< 50 °C), close the

adjusting valve [5].

▶ If the domestic hot water temperature rises (> 50 °C), open the

adjusting valve [5].

▶ When the outlet temperature is constant, mark the valve spindle of

the adjusting valve [5].

▶ Adjust the set value for the domestic hot water temperature, e.g.

50 °C, at the temperature control valve [4].

▶ Close the draw-off positions.

Fig. 37 DHW cylinder connection diagram

[1] Sensor pocket for return temperature limiter

[2] Sensor pocket for thermometer - domestic hot water

temperature

[3] DHW shut-off valve

[4] Temperature control valve without auxiliary energy

[5] Adjusting valve

[6] Pump

DANGER: Danger to life through electrical shock!

▶ Protect all electrical connections and cables against

contact!

NOTICE: Operate a DHW cylinder with immersion heater

and external current anode only with a 30 mA fault current

switch!

When commissioning, observe the operating instructions

for the floor-standing boiler and DHW cylinder.

In addition to operation with district heating, the LTN/LTH/

LTD cylinders can be heated with immersion heaters and

floor-standing boilers, while the LF cylinders can be heated

via external heat exchangers. Observe the documents for

the relevant heat source.

6 720 817 906-15.1T

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Buderus Logalux LTD550 Installation Instructions For Contractors

Buderus Logalux LTD550 Installation Instructions For Contractors

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