Viessmann VITOTRONIC 300 GW2 Guida

VITOTRONIC 300

Operating Instructions

and User’s Information Manual

Vitotronic 300, Model GW2

Outdoor-reset logic digital boiler and

heating circuit control unit

Certified as a component part

of Viessmann boilers only

Read and save these instructions

for future reference.

IMPORTANT

Please file in Service Binder

5285 9 2 v1. 05/2012

General information

Safety, Installation and Warranty Requirements

Please ensure that this manual is read and understood before commencing installation. Failure to comply with the

issues listed below and details printed in this manual can cause product/property damage, severe personal injury,

and/or loss of life. Ensure all requirements below are understood and fulfilled (including detailed information found

in manual subsections).

Licensed professional heating

contractor

The installation, adjustment, service,

and maintenance of this equipment

must be performed by a licensed

professional heating contractor.

Please see section

entitled “Important

Regulatory and

Installation

Requirements.”

Product documentation

Read all applicable documentation

before commencing installation. Store

documentation near boiler in a readily

accessible location for reference in the

future by service personnel.

For a listing of

applicable literature,

please see section

entitled “Important

Regulatory and

Installation Requirements.”

Advice to owner

Once the installation work is complete,

the heating contractor must familiarize

the system operator/ultimate owner

with all equipment, as well as safety

precautions/requirements, shut-down

procedure, and the need for

professional service annually before the

heating season begins.

Warranty

Information contained in

this and related product

documentation must be

read and followed. Failure

to do so renders warranty

null and void.

Safety Terminology

Take note of all symbols and notations intended to draw attention to potential hazards or important product information.

These include ”WARNING”, ”CAUTION”, and ”IMPORTANT”. See below.

Helpful hints for installation,

operation or maintenance which

pertain to the product.

Indicates an imminently hazardous

situation which, if not avoided, will

result in death, serious injury or

substantial product / property damage.

DANGER

Indicates an imminently hazardous

situation which, if not avoided, could

result in substantial product/property

damage, serious injury or loss of life.

WARNING

Indicates an imminently hazardous

situation which, if not avoided, may

result in minor injury or product /

property damage.

CAUTION

IMPORTANT

Index

Page

Useful tips

Introductory information

For your safety 2

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

Instructions in brief

Ready for operation

The main controls

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

The heating system is preset ...

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

Overview of controls and indicators 5

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

Select the heating circuit – before every setting and

scanning operation 6

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

Selecting the heating program (winter, summer) 7

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

Changing the room temperature (day and night temperature) 8

.......

Using the comfort functions

Setting the party mode 9

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

Activating the energy saving mode 10

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

Reference guide

Switching on and off

Starting up the heating system 11

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

Shutting down the heating system 11

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

Settings

Time programs 12

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

Changing the domestic hot water temperature 18

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

Setting the energy saving mode for the holiday period 18

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

Resetting the time and date 20

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

Selecting the language 20

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

Changing the heating pattern of the boiler 21

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

Scanning

Scanning temperatures and operating status information 2

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

Information

Troubleshooting guide

Special displays 25

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

Diagnosis and correction 27

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

Servicing/cleaning instructions and note on disposal

of unwanted equipment 30

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

5285 9 2 v1.

Ready for operationReady for operation

The main controls

You can carry out all the settings on your heating system centrally on the

control unit and on the built in programming unit.

If your system is equipped with remote controls, you can also use the remote

controls for the settings.

See operating instructions for the remote control

Please also refer to the section entitled ”Special displays” in these instructions.

The control unit is behind the hinged cover.

The hinged cover is opened by pulling the top gently downwards towards you.

You must close the hinged cover again after use.

The heating system is preset ...

The control unit is preset in the factory to a standard operating mode.

The heating system is therefore ready for operation. You can change the

factory settings to suit your individual preferences.

Date and time (CET)

The date and time are preset in the

factory. Resetting for daylight saving

time takes place automatically.

Heating program

The heating program is set for

”Heating and domestic hot water”, i.e.

heating and domestic hot water

heating take place in accordance with

the time programs.

Time programs

Between 06:00 and 22:00 hrs, heating

takes place with the normal room

temperature and, between 05:30 and

22:00 hrs, domestic hot water heating

(if a DHW tank is installed).

Heating with a reduced room

temperature takes place between

22:00 and 06:00 hrs (set to freeze-up

protection at 3°C / 37°F ).

Ready for operation

Overview of controls and indicators

Override switch (page 27)

Heating circuit selector buttons

(page 6)

Display window

Normal room temperature (page 8)

Heating programs (page 7)

Adjustable high limit

Fixed high limit

Control Power (page 11)

Fuses

TÜV TEST button (for service

purposes only)

Energy saving mode (page 10)

Party mode (page 9)

Hinged cover of programming unit

Operating status indicator (green) (page 11)

Fault indicator (red) (page 27)

Controls under the hinged cover of the

programming unit

Time program for heating (page 12, 13)

Time program for domestic hot water

heating (page 12, 15)

Other symbols (page 6)

Time program for DHW re-circulation pump

(page 12, 15)

Holiday program (page 18)

Information (page 20, 2 , 26)

Confirmation

Factory settings (page 6)

Setting buttons

Domestic hot water temperature (page 18)

Reduced room temperature (page 8)

Time/date (page 20)

Heating curve shift (page 21)

Heating curve slope (page 21)

Hinged cover of programming unit

5285 9 2 v1.

Boiler temperature

Ready for operation

Overview of controls and indicators

(continued)

Other display symbols

(These are not displayed continuously,

but appear according to system type

and operating status)

eRisk of freezing

sHeating with normal room

temperature

mHeating with reduced room

temperature

wDomestic hot water heating,

DHW pump ON

pHeating circuit pump ON

VMixing valve open

vMixing valve closed

ABurner ON

Adjustment of the display window

contrast

Open the hinged cover on the

programming unit, press and, at

the same time, adjust the contrast

with the or button.

Factory settings

Press this button to reset all altered

values to their factory settings.

Flashing data

Data flashing in the display window

means that new settings can be

entered.

Select the heating circuit – before every setting and scanning operation

On heating systems with only one heating circuit, you can start making all

settings immediately.

On heating systems with two or three heating circuits, the corresponding

heating circuit must be selected before carrying out each setting and

scanning operation.

Heating circuit selector button !: Heating circuit 1 without mixing valve

(system circuit)

Heating circuit selector button ?: Heating circuit 2 with mixing valve

Heating circuit selector button §: Heating circuit 3 with mixing valve

The heating circuits are individually labelled by your heating contractor.

Press !or ?or §; the following

buttons are illuminated:

the heating circuit selector button

the current heating program

(see page 7)

the party or energy saving mode,

if selected (see page 9 and 10).

You can now start making the

settings and adjustments for the

selected heating circuit.

If you have not selected the

required heating circuit before

starting to carry out the settings,

the following instruction appears

in the display window: ”First

select button 1 or 2” or ”First

select button 1, 2 or 3”.

If no further settings are made, the

illumination of the buttons is

extinguished after a short time.

Boiler temperature

Ready for operation

Selecting the heating program (daylight saving time)

. Press the heating circuit selector

button; the button is illuminated.

2. Select the required heating program

with the rw,wor 9button.

The selected heating program

appears in the display window

for a short time.

Heating and domestic hot water

Heating with alternating normal and

reduced room temperature (freeze-up

protection) according to the selected

time program

Domestic hot water supply (if a DHW

tank is installed) and DHW

re-circulation pump (if installed) ON

according to the selected time

program

Freeze-up protection of the boiler and

the DHW tank

Example

For the winter and transitionary

periods.

Please note:

When the button is illuminated, the

”s” symbol appears in the display

window during heating with the

normal room temperature; the ”m”

symbol is illuminated during heating

with a reduced room temperature

higher than 3°C (see page 8).

Domestic hot water only

No heating

Domestic hot water supply (if a DHW

tank is installed) and DHW

re-circulation pump (if installed) ON

according to the selected time

program

Freeze-up protection of the boiler and

the DHW tank

Standby operation

No heating

No domestic hot water supply

Freeze-up protection of the boiler and

the DHW tank

Example

For the summer.

Please note:

If no DHW tank is connected,

”Without function” is displayed.

The circulation pumps are

switched on for a short time every

24 hours to prevent them from

seizing up.

5285 9 2 v1.

Ready for operation

Changing the room temperature

In the ”Heating and domestic hot water” heating program, heating takes place

with alternating ”normal room temperature” and ”reduced room temperature”

according to the selected time program (see page 12).

You can set the required room temperature as follows.

To change the ”normal room temperature” (day temperature)

Normal room temp.

ºC

Factory setting: 20°C / 68°F from

06:00 to 22:00 hrs.

The ”normal room temperature” can be

set between 3 and 37°C / 37 and

99°F.

. Press the heating circuit selector

button; the button is illuminated.

2. Set the required temperature value

with the ”ts” selector knob.

The display changes after a short

time and shows the boiler

temperature.

To change the ”reduced room temperature” (night temperature)

Reduced room temp.

ºC

Factory setting: freeze-up protection

3°C / 37°F from 22:00 to 06:00 hrs.

The ”reduced room temperature” can

be set between and 37°C / 39 and

99°F.

. Open the hinged cover on the

programming unit.

2. Press the heating circuit selector

button; the button is illuminated.

3. tm Press tm; the previous

temperature setting flashes

in the display window.

4. / Press the / button until

the required temperature

value appears.

5. Confirm by pressing ; the

temperature value stops

flashing and is stored.

The display changes and

shows the boiler

temperature.

6. Close the hinged cover on the

programming unit.

Example

Set to save energy at times when

rooms are not in use.

Please note:

If the temperature value 3°C /

37°F is selected, ”Freeze up

protection” appears in the

display window.

Using the comfort functions

Setting the party mode

Switch on the party mode when you require heating and domestic hot water

(if a DHW tank is installed) for a short time independently of the preset heating

and time program.

To activate the party mode

Party mode

ºC

. Open the hinged cover on the

programming unit.

2. Press the heating circuit selector

button; the button is illuminated.

3. gPress g; the button is

illuminated, the party mode

display appears in the display

window and the party

temperature value flashes.

4. To change the party temperature:

/ Press the / button until

the required temperature

value appears.

5. Confirm by pressing ;

the temperature value stops

flashing and is stored.

The display changes and

shows the boiler

temperature.

6. Close the hinged cover on the

programming unit.

To cancel the party mode

The party mode is cancelled the next

time the preset heating program

switches automatically to heating

with the ”normal room temperature”.

If you want to cancel the party mode

immediately, press the heating circuit

selector button and the gbutton

again; the button is no longer

illuminated.

5285 9 2 v1.

Using the comfort functions

Activating the energy saving mode

The energy saving mode is only possible in the ”rw“ heating program. Switch

on the energy saving mode when you require particularly economic heating for a

short time. In the energy saving mode the preset room temperature is

automatically lowered.

Energy saving mode

To activate the energy saving mode

. Press the heating circuit selector

button; the button is illuminated.

2. ûPress û; the button is

illuminated, the energy saving

mode display appears in the

display window for a short time.

To cancel the energy saving mode

The energy saving mode is cancelled

automatically the next time the

preset heating program switches to

heating with the ”reduced room

temperature”.

If you want to cancel the energy

saving mode immediately, press the

heating circuit selector button and

the ûbutton again; the button is no

longer illuminated.

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