Centrometal TB 120 Stainless Steel Water Heater Instructions

Centrometal TB 120 Stainless Steel Water Heater

Basic parts, technical data

TB – Basic parts

1. Hot water connecction
2. Recirculation
3. Place for temp. sensor
4. Cold water connection
5. Thermal insulation
6. Tube heat exchanger
7. Opening for cleaning (TB 120-150)
8. Water draining connection
9. Base of the heater
10. Boiler water connection-inlet
11. Boiler water connection-outlet
12. Thermometer
13. Opening for cleaning (TB-200-850)

TECHNICAL DATA

Setting temperature of the boiler hot water to 80, 70, 60 °C; DHW 10/45 °C

Basic dimensions of the stainless steel water heater TB

 | TB 120| TB 150| TB 200| TB 300| TB 600| TB 850
---|---|---|---|---|---|---
Height D(mm)| 92| 92| 92| 92| 100| 72
Height E (mm)| –| –| 300| 300| 390| 325
Height F (mm)| –| –| 810| 950| 1100| 1075
Height G(mm)| –| –| 920| 1060| 1200| 1375
Height H(mm)| –| –| 1150| 1650| 1710| 1640

Introduction, purpose

HEAT EXCHANGER PRESSURE DROP FOR TB 120 – 850

INTRODUCTION

The stainless steel water heater TB is manufactured with most modern welding technology, made from materials of great quality which assures high efficiency when using and guarantees the product quality. Boilers TB are made from 120-150 with connections on the top side and boilers TB 200-850 with connections on the back side. The water heater is manufactured from stainless steel and was tested under the probe pressure of 1,2 Mpa (12 bar), with inbuilt thermometer. Supplied with 80 mm thick thermal insulation coated with hard plastic on the outside. This instructions have to be carefully studied, to learn about correct assembling, handling, use and maintainance. This is necessary in order to enable your combined hot water boiler to operate according to its purpose and produce heat for your home for many years.

PURPOSE

Water heaters TB are engineered for heating and accumulating of domestic hot water with the connection to the boiler circuit or to another heat source being part of some technological process. Often they are connected to solar systems for additional accumulation with solar water heaters STB. Water heaters are made of stainless steel, which guarantees a high hygienic level. Wide application of modern technologies and the quality of the material as well as double checked technical solutions, allows grade of heat exchange and minimal loss of temperature. Produced in compliance with ISO 9001

MOUNTING

The water heater is factory insulated, with thermometer and ermeto fittings on heat exchanger connections, and it is delivered on the palette. If it cannot pass through a door, insulation can be taken off and put on in the room afterwads. TB is intended for mounting on the flat surface in the room for such application (boiler room, energy station,…).

CONNECTION TO THE WATER SUPPLY AND HEATING SYSTEM

The water heater connection to a water supply system must be done with accordance with valid technical standards by a qualified person (Scheme 1). The cold water inlet is the lowest connection on the heater, marked with a blue rosette, and the hot water outlet is the highest connection, marked with a red rosette.
On the cold water inlet is obligatory to install following elements:

• domestic hot water expansion vessel
• water heater drain cock (obligatory install it with the T-piece)
• the safety valve (certified to open at 6 bar)
• check valve
• pressure reduction valve to decrease a cold water inlet pressure to the 4 bar (if the pressure is higher).

The safety valve must be regulary conterolled, limescale must be removed becauce it can block the flow to the safety valve. The safety valve outlet must be installed in barometric pressure enviroment that never freezes. In order to have a longer operation life it is recommend to install a water softener, especially if the heater is connected to a municipal water supply system (hard water and water with chlorine), and if galvanized water tubes are used, which can harm stainless steel materials. Recirculation connection is placed between the top and bottom heat exchanger, marked with red rosette on all models except TB 850, where it is located between the upper and lower connection of the upper tubular exchanger.

A thermostatic 3-way valve and recirculation pump installation must be done upon one of two ways, depending on the purpose or position of taps.
Scheme 2. shows the recirculation pump installation in the system with two or more thermostatic 3- way valves. Different temperature can be set for certain group of taps that are placed after the thermostatic 3-way valve. Smaller valve can be selected depending on the number of taps.

Scheme 3. shows the thermostatic 3-way valve installation for all taps, right on the heater hot water outlet. If even one of the shown elements in the scheme is missing, the recirculation will not work properly.

The schemes 2. And 3. do not show required elements for connection to the municipal water supply system, but those elements must be installed as it is shown in Scheme 1.

Connection to the water supply and heating system

Shema 1. – Connection stainless steel water heater to the water supply and heating system

Legend

1. Stainless steel water heater TB
2. Expansion vessel for heating system
3. Tap for drainage-obligatory throuht the T – piece
4. Safety valve (6 bar)
5. Check valve
6. Pressure reduction valve
7. Shut-off valve DOMESTIC: COLD WATER (ENTRANCE)

it is required to install if the water supply pressure is higher than 4 bars

Scheme 2. Recirculation pump installation to the system with two or more thermostatic 3-way mixing valves

Scheme 3. Thermostatic 3-way mixing valve installation for all taps, right on the heater hot water outlet, with recirculation pump

Connection to the water supply and heating system

On scheme 4, is shown an example ways of connecting the boiler to system for heating domestic hot water. Connections on the heat exchangers are marked with rosettes (red ones on the inlets and blue ones on the outlets). Connection must be done with ermeto fittings that are factory mounted at the heat exchanger ends. Before commissioning, air-vent must be done.

Schema 4. – example of connection

1. Boiler
2. Air self-venting group 2,5 bar
3. Return flow sensor
4. Flow sensor
5. Boiler TB
6. DHW sensor 9 – Heating circuit
7. Room thermostat 11 – Hydraulic crossover 12 – Outdoor sensor

Insert the sensor on DHW tank of boiler control unit for TB

HEATER MAINTENANCE TB

It must not be used by children or disabled persons (either physically or mentally), as well as by person without knowledge or experience, unless they are under control or trained by s person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance. At necessary to check and clean it from the scale and sediment (depend of water quality). Before the cleaning it is obligatory to disconnect the stainless steel water heater from the power supply and discharge it (through the tap for drainage on the cold water installation, picture 1).
After that is necessary tako off the cover of cleaning opening which is bottom of the stainless steel water heater TB 120-150 or front side at TB 200-850 (Picture 1).
After cleaning cover must be returned to opening for cleaning (Picture 1).

ENERGY LABELS

Centrometal d.o.o. shall not be responsible for possible incorrect data caused by printing errors or error made in transcription and all figures and diagrams are for explanatory purposes only and relevant adjustment have to be made at the spot. In any case, it reserves the right to modify its products as deemed to be required and useful without any prior notification.

EC DECLARATION OF CONFORMITY **

**

Centrometal d.o.o. Glavna 12, 40306 Macinec, Croatia

• central tel: 040 372 600,
• fax: 040 372 611
• service tel: +385 40 372 622,
• fax: +385 40 372 621
• www.centrometal.hr
• e-mail:servis@centrometal.hr

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