Bosch TF250, TF325, TF400 User Manual

Continuous Flow Gas Water Heaters (External Models)

HydroPower

TF250-8G(10H)/ TF325-8G(13H)/ TF400-8G(16H)

8 716 473 071 (2015/04) AU

Installation Manual and Operating Instructions

Read installation manual prior to installation of this unit!

Read user manual before putting this unit in operation!

Observe the warnings in the manuals!

The installation room must fulfill the ventilation requirements!

Installation by an authorised person only!

2 | Table of contents

Table of contents

1	Safety information and symbols . . . . . . . . . . . . . . . .		3	10	Water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	18
	1.1	Key to symbols . . . . . . . . . . . . . . . . . . . . . . .	3
	1.2	Safety information	3
				11	Warranty details	19
2	Technical Characteristics and Dimensions . . . . . . .		4
	2.1	General Description . . . . . . . . . . . . . . . . . . .	4
	2.2	Explanation of Model Code . . . . . . . . . . . . . .	4
	2.3	Package contents . . . . . . . . . . . . . . . . . . . . .	4
	2.4	Product overview . . . . . . . . . . . . . . . . . . . . .	4
	2.5	Description of the Hot Water Unit . . . . . . . .	4
	2.6	Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . .	6
	2.7	Electrical scheme . . . . . . . . . . . . . . . . . . . . .	7
	2.8	Technical characteristics . . . . . . . . . . . . . . .	7
3	Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		8
4	Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		8

4.1 Important information . . . . . . . . . . . . . . . . . . 9

4.2Requirements of the installation location . 10

	4.3	Hot Water Unit mounting . . . . . . . . . . . . . .	11
	4.4	Water connection . . . . . . . . . . . . . . . . . . . .	12
	4.5	Gas connection . . . . . . . . . . . . . . . . . . . . . .	12
	4.6	Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	12
5	Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		12

5.1 Before starting up the heater . . . . . . . . . . . 12 5.2 Remove the front cover . . . . . . . . . . . . . . . . 12 5.3 Inlet pressure adjustment . . . . . . . . . . . . . . 13 5.4 Burner pressure adjustment . . . . . . . . . . . . 13 5.5 Conversion to a different type of gas . . . . . 14

6	Operating instructions . . . . . . . . . . . . . . . . . . . . . . .		14
	6.1	Consumer gas adjustment . . . . . . . . . . . . .	14

6.2Consumer temperature/flow adjustment . 14

7	Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		15
8	Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		16
	8.1	Problem/cause/solution . . . . . . . . . . . . . . .	16
9	Environmental protection . . . . . . . . . . . . . . . . . . . .		17

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Safety information and symbols | 3

1Safety information and symbols

1.1Key to symbols

Warnings

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.

The following keywords are defined and used in this document:

•NOTICE indicates a situation that could result in damage to property or equipment.

•CAUTION indicates a situation that could result in minor to medium injury.

•WARNING indicates a situation that could result in severe injury or death.

•DANGER indicates a situation that will result in severe injury or death.

Important information

This symbol indicates important information where there is no risk to people or property.

If you notice dark combustion gases or sooting:

Isolate the Gas supply to the heater.

Notify an authorised technician.

Installation, Assembly and Modifications

The installation, assembly and modifications to the heater must only be performed by an authorised installer.

Maintenance

The water heater is required to have a service and safety inspection every two years.

The Installer is responsible for the safety and environmental compatibility of the installation.

The Owner/User is responsible for keeping the area around the water heater free from debris.

Safe access to inspect and service the water heater is the responsibilty of the property owner.

Only original spare parts must be used, supplied by an authorised distributor of Genuine Bosch parts.

Explosive and highly flammable material

Do not store or use flammable material (paper, spray cans, solvents, paints, etc) near the heater.

Combustion air and surrounding air

To avoid corrosion, the combustion air and surrounding air must be free from harmful substances.

Do not spray aerosols or use chemicals around the heater unless heater is isolated. (All valves closed).

Additional symbols

Symbol Explanation

Step in an action sequence

	Cross-reference to another part of the document
•	List entry
–	List entry (second level)

Table 1

1.2Safety information

If you smell gas:

Close the gas supply valve to the appliance.

Isolate gas supply from gas meter or LPG bottle.

Do not operate any electrical appliances or switches (on/ off).

Extinguish other sources of ignition.

Go to a different location and call the gas supplier or an authorised technician in order to check the gas supply.

Risk of damage due to operator error

Operator errors can result in injury and damage to property.

Ensure that children never operate this appliance unsupervised.

Ensure that only personnel who can operate this appliance correctly have access to it.

Refer to the operating and user instructions before adjusting the water heater.

To be installed and serviced only by an authorised person

The “authorised installing person” is responsible for:

Correct installation and commissioning of this appliance.

Ensuring the appliance performs to the specifications stated on the rating label.

Demonstrating the operation of the appliance to the customer before leaving.

Handing these instructions to customer.

THIS APPLIANCE IS NOT SUITABLE FOR POOL, SPA POOL OR SOLAR BOOSTER APPLICATION.

NOT SUITABLE FOR COMMERCIAL BOOSTING OF A WARM WATER RECIRCULATION SYSTEM.

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4 | Technical Characteristics and Dimensions

2Technical Characteristics and Dimensions

2.1General Description

Models	Bosch Hydropower TF250/325/400
Category	CONTINUOUS FLOW
Type	GAS - EXTERNAL INSTALLATION

Table 2

2.2Explanation of Model Code

TF (Top Flue)	250 (10 litres/min	G (Hydrogenerator)
	@ 25 °C Rise)
TF (Top Flue)	325 (13 litres/min	G (Hydrogenerator)
	@ 25 °C Rise)
TF (Top Flue)	400 (16 litres/min	G (Hydrogenerator)
	@ 25 °C Rise)
Table 3

2.3Package contents

• Gas hot water unit

• Documentation

2.4Product overview

HydroPower Ignition is exclusive to Bosch - it does not require a 240V power supply.

•HydroPower uses the energy created by the water flow to ignite the burner and begin the heating process. The unit only starts when a hot water tap is opened. Once the tap is turned off, the unit turns off.

2.5 Description of the Hot Water Unit

•Hot Water Unit for external wall-mounting only

•Available in Natural gas or LP gas

•Hydrogenerator produces sufficient energy to ignite and control the heater

–Water enters the Hydrogenerator

–The turbine spins with water flow

–A voltage is generated by the turbine

–This voltage causes the ignition control unit to light a temporary pilot

–The water pressure opens the main burner gas valve and the pilot ignites the main burner, the pilot then goes out

–The water flows through the heat exchanger where it is heated

•Safety devices:

–Flame rod to check for accidental extinction of the burner flame

–Overtemperature switch to prevent overheating.

•Water filter on the inlet water supply

Economical

Only heating water when required, the Bosch range is extremely economical to run.

Versatile

LPG models are particularly popular in country areas, where Natural Gas is not available.

Low Temperature Areas

In areas where the atmospheric temperature may drop to 0 °C for brief periods, the installation of an EXOGEL valve (part number H707 060 151) will minimise the possibility of damage to the appliance if the water freezes.

NOTICE:

This water heater MUST NOT be installed in areas where the temperature remains below 0 °C for extended periods.

Fig. 1 EXOGEL valve

[1]Hot water

[2]Cold water

[3]EXOGEL valve

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Technical Characteristics and Dimensions | 5

Low Flow Rates

This gas water heater is designed to operate at a minimum flow rate between 3.2 to 4.0 litres per minute. Sufficient flow must be provided to ensure the correct operation of the appliance.

There are various causes of a low flow rate including, but not limited to:

•Low flow tapware

•Flow restrictors/aerators

•Hand held showers

•Poor inlet pressure to property

•Restrictive pipework and/or fittings

Water fixtures with a flow rate of 7.5 litres per min for hand basins and 9 litres per min for shower roses are recommended.

Failure of the unit to operate correctly due to poor flow rate will not be covered by warranty.

HydroPower

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6 | Technical Characteristics and Dimensions

2.6	Dimensions
	A		265
	1
	D
	4	4
	2
		B
	3		C
			E
	7	NG: Ø3/4"
	5	LPG: Ø1/2"	6
	50
	120	120
	Ø1/2"	Ø1/2"	9708069951-01.2V

Fig. 2

[1]Top flue

[2]Front cover

[3]Inspection window

[4]Wall mounting point

[5]Cold water inlet

[6]Gas inlet

[7]Hot water outlet

Dimensions (mm)	A	B	C	D	E	Weight (kg)
TF250(10H)	405	845	533	240	68	21
TF325(13H)	405	845	533	240	68	22
TF400(16H)	460	936	533	240	82	25

Table 4 Dimensions

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Technical Characteristics and Dimensions | 7

2.7Electrical scheme

4 5

3

S HV

2

6

1

9

8

7

9708069951-11.1V

Fig. 3

[1]

Main Solenoid Valve

[6]

Temperature limiter

[2]

Diaphragm Switch

[7]

Hydrogenerator

[3]

Pilot Solenoid Valve

[8]

LED (green)

[4] Ionisation electrode (Flame Rod)

[9]

LED (red)

[5] Ignition electrode (Spark Electrode)

2.8 Technical characteristics

Technical characteristics	Units	TF250H / 10H	TF325H / 13H	TF400H / 16H
Gas Consumption
Nominal Gas Consumption	MJ/h	79	104	130
Supply pressure flowing
Natural gas (When operating)	kPa	1.13	1.13	1.13
LP gas (When operating)	kPa	2.75	2.75	2.75
Number of injectors		12	14	18
Water data
Maximum permissible pressure (Static)	kPa	800	800	800
Temperature selector in fully clockwise position
Temperature rise (Above incoming water temperature)	°C	50	50	50
Water flow range (Litres per minute)	l/min	3.2 to 5	3.2 to 6.5	3.2 to 8
Minimum operating water pressure	kPa	30	40	50
Minimum constant water pressure for minimum flow	kPa	60	100	130

Table 5

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	8 | Regulations
Technical characteristics		Units	TF250H / 10H	TF325H / 13H	TF400H / 16H
Temperature selector in fully anti-clockwise position
Temperature rise (Above incoming water temperature)		°C	25	25	25
Water flow range (Litres per minute)		l/min	4 to 10	4 to 13	4 to 16
Minimum operating water pressure		kPa	45	45	45
Minimum constant water pressure for maximum flow		kPa	100	140	170
Table 5
3	Regulations		NOTICE: Property damage!
All local by-laws and regulations pertaining to installation and			If the appliance is to be installed on a
			combustible surface:
use of gas appliances must be observed.
			Use a heat shield as per AS/NZS5601 -
This appliance must be installed in accordance with the
			accessory
manufacturers installation instructions, AS/NZS5601, AS/
			9 708 061 400.ZG1 (Fig. 4).
NZS3500 and all Local Building & Gas fitting regulations.
This appliance must not be installed indoors or in an enclosed
space. This appliance is approved for outdoor installation only.				850 mm
Do not install this appliance with any modification or alteration.				mm
Failure to install this appliance in accordance with these					mm
				230
installation instructions will void the warranty and may create					400
an unsafe situation.
			=		=

4Installation

DANGER:
This appliance must not be installed indoors
or in an enclosed space in accordance with	9708069951-12.1V
AS/NZS5601.

	DANGER: Explosion Risk!		Fig. 4	Heat shield
	Always turn off the gas valve before
				The installation and the initial startup are to
	carrying out any work on components
	which carry gas.			be carried out only by an authorised person.
	DANGER: Appliance malfunction!
				Not suitable for pool, spa pool, or solar
	This appliance must be installed with no
	obstructions to air entry openings at the			booster application.
	front, rear, side, or top.			Not suitable for commercial boosting of a
	Periodic checking of openings to ensure			warm water recirculation system.
	no blockage or obstruction of the air
	openings from plants, debris, or insects
				This appliance should only be installed in
	must be carried out.
				applications where incoming cold water
				temperature does not exceed 40 °C.

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HydroPower