Biddle NOZ2 G User Manual

Manual

Gas-fired air heater

Model NOZ2 G

Version 4.0
Original Manual

a

English

en

GAS-FIRED AIR HEATER

. . . Contents

1 Introduction 4

1.1 About this manual 4

1.2 How to use this manual 4

1.3 How to read this manual 5

1.4 About the unit 6

1.5 Components and accessories 8

1.6 Restrictions on use 8

1.7 Safety instructions 10

2 Installation 12

2.1 Preliminary checks 12

2.2 General instructions 13

2.3 Determining the location of the unit 14

2.4 Mounting the roof cowl (accessory) 15

2.5 Hanging the unit up 15

2.6 Regulating the discharge direction 19

2.7 Connecting the air supply and flue pipe 20

2.8 Connecting the unit to the gas supply 22

2.9 Connecting the unit to the mains supply 24

2.10 Installing the MultiTherm C clock thermostat 26

3 Commissioning 28

3.1 About commissioning 28

3.2 Checks before commissioning 29

3.3 Operating mode 30

3.4 Switching on and checking operation 31

4Operation 35

4.1 General 35

5 Decommissioning 36

5.1 About decommissioning 36

5.2 Procedure for decommissioning 36

6Errors 37

6.1 Resolving simple problems 37

6.2 Reading out and resetting error messages 38

6.3 Remedying errors without an error message 38

6.4 Remedying errors that are accompanied by an error message 39

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MANUAL FOR NOZ2 GAS-FIRED

7 Maintenance 42

7.1 Daily inspection 42

7.2 Scheduled maintenance 42

7.3 Inspecting the gas burner 43

7.4 Adjusting the ignition electrode 45

7.5 Cleaning the unit 45

8 Servicing 47

8.1 Access 47

8.2 Fuses 49

9 Dismantling 51

10 Addresses 53

Keywords 54

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1. . Introduction

1.1 About this manual

This manual describes the installation, commissioning and
maintenance of the gas-fired air heater model NOZ
provides tips and information for servicing activities and for
the remedying of errors.

G. It also

2

1.2 How to use this manual

1.1.1 Countries where manual is applicable

This manual is applicable in countries with the following coun­try codes:

BE, DE, FR, GB, NL

If a country code for another country is listed on the packag­ing and/or type plate of the unit, please contact your supplier.

The manual contains important instructions for promoting the
proper and safe functioning of the unit, and for the prevention
of accidents and damage.

Read through this manual carefully before performing
any operation on the unit.

Leave this manual with the unit.

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MANUAL FOR NOZ2 GAS-FIRED INTRODUCTION

Note:

Caution:

Warning:

Danger:

1.3 How to read this manual

1.3.1 Designations used in the manual

The following symbols are used in the manual:

n Refers to an important section in the text.

c If you do not carry out the procedure or action

correctly, you may cause damage to the unit.

Follow the instructions precisely.

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S

YMBOL DESCRIPTION

w If you do not carry out the procedure or

action correctly, you may cause physical injury
and/or damage.

Follow the instructions precisely.

d Is used to designate actions that are not

permitted.

Ignoring this prohibition may lead to serious
damage or to accidents resulting in physical
injury.

1.3.2 Symbols used on the unit and in the manual

The following symbols indicate possible risks or hazards. The
same symbols will also be found on the unit.

w You have accessed a section of the unit containing components which carry

a voltage.

Access restricted to qualified maintenance staff only.

Caution is required.

w This surface or component may be hot. Risk of burns on contact.

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INTRODUCTION GAS-FIRED AIR HEATER

1.3.3 Related documentation

In addition to this manual, the following documentation is also
supplied with the unit:

• wiring diagram for installation and servicing.

• table of technical data

• list of required components, and spare parts

Manual for the control panel

The method of operation for everyday use and the settings are
described in the manual for the MultiTherm control panel.

1.4 About the unit

1.4.1 Application and operation of the air heater

The air heater is intended for the heating of large, open
spaces. The unit is placed (free-hanging) at the top of the
space concerned.

The unit blows currents of warm air downwards. The airflow
rate ensures that the warm air is spread over a large area.

1.4.2 Operation of the gas heating

The discharged air is heated by a built-in gas burner. The
burner takes in fresh air from outside and conveys the com­bustion gases out of the building. This is separated from the air
that the unit takes in and discharges inside the building. The
burner has an electronic control system, and is automatically
operated.

1.4.3 Control of the unit

The unit is controlled by the MultiTherm C clock thermostat.
The burner starts automatically when the unit’s fan is rotating,
and there is demand for heat.

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1.4.4 Type designation

The table below gives an overview of the available models of
the air heater and the corresponding type designations. In
combination, the type designations constitute the type code,
for instance: NOZ

25-G20/3.

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MANUAL FOR NOZ2 GAS-FIRED INTRODUCTION

Explanation of the type code

T

YPE CODE ELEMENT DESIGNATION MEANING

product series NOZ

2

general designation for the series

capacity 25 short range

gas type G20/3 gas heating, gas type G20

G25/3 gas heating, gas type G25

G31/3 gas heating, gas type G31

1.4.5 Type plate

The type plate can be found behind the front panel, on the
door of the service compartment.

Designations on the type plate

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DESIGNATION DESCRIPTION

Type complete type code of the unit

o

N

order number
(including production date)

Gas type type of gas with pressure

Country country of destination

Category gas category

Qn (hi) rated power consumption of the

gas burner

CO

2

CO2 control value of the flue gases

U power supply voltage

I

max

maximum current (per phase)

P maximum power consumption

M weight of unit

1.4.6 CE declaration

The unit is compliant with the applicable CE standards. The
complete CE Declaration of Conformity can be found at:
www.biddle.info.

1.4.7 Modifications and changes

Without the approval of Biddle, no changes or modifications
may be made to the unit that could adversely affect safety. The
CE declaration is no longer valid if the unit has been modified
or changed in any way.

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INTRODUCTION GAS-FIRED AIR HEATER

1.5 Components and accessories

1.5.1 Components supplied

• adjustment aid, nozzle angles.

1.5.2 Accessories

The accessories are described in the list of components sup­plied.

1.5.3 Components not supplied

The following components required for installation must be
obtained from third parties:

1.6 Restrictions on use

• threaded rods

• other cabling

1.6.1 General restrictions

w The unit may only be used if all these

conditions have been met:

• The unit must be installed and maintained by qualified tech­nical staff.

• The unit must be installed in accordance with the instruc­tions.

• All restrictions on use must be complied with.

1.6.2 Required skills

• In order to perform installation, maintenance, or servicing
work on the unit, you must be technically qualified to work
with gas and electrical equipment, in accordance with the
locally applicable laws, regulations and standards.

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• For operation in daily use, no special skills are required.

• The unit is not intended for use by children or people with
an intellectual disability.

d NEVER attempt to perform installation,

maintenance, or servicing work on the unit
unless you are sufficiently qualified.

MANUAL FOR NOZ2 GAS-FIRED INTRODUCTION

Danger:

1.6.3 Country in which unit is intended to be used

• This unit is exclusively intended for use in the country that
is specified on the type plate.

Country codes

C

ODE COUNTRY

BE Belgium

DE Germany

FR France

GB United Kingdom

NL The Netherlands

1.6.4 Type of gas

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• The unit has been pre-adjusted and tested for the gas type
indicated on the type plate.

• If you wish to use the unit with a different type of gas: con­tact Biddle.

d NEVER use the unit with a different type of

gas than specified. An incorrect combination
of gas type and unit version can result in
carbon monoxide formation and lead to
overheating.

Gas type codes

CODE TYPE OF GAS

G20 natural gas

G25 natural gas

G31 propane

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INTRODUCTION GAS-FIRED AIR HEATER

1.6.5 Field of application

• The unit may only be used indoors.

• The unit is suitable only for dry and non-dusty environ­ments.

• The unit may not be used in an environment in which cor­rosive or chemically aggressive gases or vapours are pre­sent.

• The unit is suitable for ambient temperatures from 0°C to
40°C.

These restrictions also apply to the control unit and/or the
control panel.

1.7 Safety instructions

1.7.1 Safety issues relating to installation, mainte-

nance and servicing

d NEVER try working on the unit unless you are

technically qualified.

w When opening the unit and/or the control

unit:

The unit contains electrically-live and/or hot
parts. Be careful not to touch these when
opening the unit and/or control unit.

w If you assemble or disassemble any part of the

unit, and/or make or break any connection:

Decommission the unit and disconnect it
from the power source in accordance with the
instructions. NEVER interrupt the mains
supply abruptly.

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w Do not break any seals.

See also:

5 "Decommissioning" on page 36

MANUAL FOR NOZ2 GAS-FIRED INTRODUCTION

Danger:

Danger:

Warning:

Warning:

Warning:

Caution:

1.7.2 Safety in use

d NEVER put any objects into the inlet and

discharge openings of the unit.

d NEVER block the inlet and discharge openings

of the unit, otherwise overheating may occur.

w The surface of the unit and the flue pipe can

become hot. Keep flammable materials away
from it.

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w Keep flammable materials out of the range of

the discharge of the unit.

w If you smell gas:

- DO NOT operate the unit.

- Make sure no sparks occur in the same space:
do NOT touch electrical switches, and do
NOT use any telephone.

- Turn off the gas supply.

- Switch the mains supply off.

- Ventilate the area.

c Always decommission the unit in accordance with

the prescribed procedure. NEVER turn off the unit
abruptly using the operating switch, and NEVER
abruptly interrupt the mains supply.

See also:

5 "Decommissioning" on page 36

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2. . Installation

w Installation activities may only be performed

by technical staff qualified for this purpose.

w Before starting installation: read the safety

instructions.

See also:

1.7.1 "Safety issues relating to installation, maintenance and ser­vicing" on page 10

1.6.2 "Required skills" on page 8

2.1 Preliminary checks

2.1.1 Inspection on delivery

• Check the unit and the packaging to ensure that they have

been delivered in good order. Notify the driver and the
supplier immediately if any shipping damage is detected.

• Ensure that all components are present. Notify supplier of

any missing parts immediately.

See also:

1.5 "Components and accessories" on page 8

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MANUAL FOR NOZ2 GAS-FIRED INSTALLATION

Warning:

2.1.2 Check before installation

w Check the following before unpacking the

unit. Install the unit only if all conditions have
been complied with.

• The unit must be suitable and have been adjusted for the
locally available gas supply (type of gas and gas pressure).

• The electrical connection data on the type plate must cor­respond to the locally available electricity supply.

• All restrictions on use must have been complied with.

See also:

1.4.5 "Type plate" on page 7

1.6.4 "Type of gas" on page 9

1.6 "Restrictions on use" on page 8

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2.2 General instructions

2.2.1 Sequence of operations

When installing the unit, stick to the following sequence of
operations:

1. Perform the checks in advance.

2. Install the unit and plug it in, in the order described.

3. Commission the unit and check the operation.

4. Enter the necessary settings.

2.2.2 Measures to be taken in the event of construc-

tion work

Intake of dust, cement, grit, etc., can damage the unit. As long
as such substances are present in the space:

• do not commission the unit;

• cover all inlet and discharge openings.

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2.3 Determining the location of the unit

w Observe the following rules. Take into

account the safety dimensions.

• The unit may only be installed and used in rooms with ade­quate ventilation.

• Make sure that the structure from which the unit is about
to be suspended can bear the weight of the unit. The unit’s
weight is indicated on its type plate.

• The connections on the unit should not be mechanically
burdened by the suspension of the unit.

• The unit must hang freely in the room. Note the following
dimensions:

SIZE DESCRIPTION VALUE

H minimum mounting height 280 cm

I minimum distance between ceiling and

unit (with inlet from room)

J minimum distance to walls 3 m

S minimum required free discharge range 50 cm

M required free space for maintenance 50 cm

• The unit must be able to freely take in and discharge air.

• No combustible materials may be located:

- within 20 cm of the unit;

- above the inlet opening;

- within 50 cm of the nozzle discharge.

• It should not be possible to reach the nozzles without the
use of mechanical aids.

See also:

1.4.5 "Type plate" on page 7

70 cm

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MANUAL FOR NOZ2 GAS-FIRED INSTALLATION

2.4 Mounting the roof cowl (accessory)

You have the option of installing a roof cowl if the unit is used
for ventilation.

Conduit sizes

NOZ

25

2

conduit 575 x 575 mm

1. Make a hole in the roof.

2. Make a curb 1 around the hole.

3. Fit roof covering over the curb.

4. Remove the top 3 of the roof cowl by loosening the bolts.

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2.5 Hanging the unit up

5. Place the roof cowl over the curb.

6. Attach the cowl using the screws in the curb as in 2.

7. Mount the top 3 onto the roof cowl.

8. Seal all cracks between the roof cowl and the roof with a
draught-free and leak-proof finish.

2.5.1 Hanging the unit up

1. If you are using the suspension frame (accessory):

- Attach the suspension frame.

If you are not using a suspension frame:

- Insert four threaded rods. Make sure that the threaded

rods are hanging perpendicularly.

Dimensions for suspending from threaded rods

NOZ2 25

distance between threaded rods 710 x 640 mm

screw thread M8

2. Onto each threaded rod, screw two bolts a few centime­tres apart.

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INSTALLATION GAS-FIRED AIR HEATER

3. Hang the unit from the threaded rods:

- Hook the threaded rods with the lowest set of bolts in
the key holes on the top of the unit.

- Internally, there is a locking edge under every keyhole.
The bolts must lock in place behind these.

4. Secure the unit by tightening the top bolts against the plat­ing.

w The suspended unit must be secured.

2.5.2 Mounting the damper module (accessory)

1. Place the flange 1 of the damper module over the flange
2 of the unit.

2. Attach the flanges together, using 12 screws 3.

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MANUAL FOR NOZ2 GAS-FIRED INSTALLATION

2.5.3 Installing the ventilation ducts (accessories)

If the unit is used for ventilation, you can optionally install a
ventilation duct.

1. Place the interconnecting duct 1 over the flange 2 of the

unit or the damper module.

2. Attach the interconnecting duct to the flange, using 12
screws.

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2.5.4 Mounting the unit to the roof cowl

c The unit cannot be suspended from the roof cowl.

One must always make use of a suspension
construction, such as a suspension frame, for
example.

1. Determine the height at which the unit must hang, and if
necessary, attach a channel section of the correct length to
the roof cowl.

2. Bring the unit to the correct height, so that the flange 1
comes within the rim of the roof cowl 2.

3. Attach the roof cowl to the flange, using 12 screws.

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MANUAL FOR NOZ2 GAS-FIRED INSTALLATION

Caution:

2.6 Regulating the discharge direction

Set the nozzles to the angle which produces the most optimal
effect of the unit for the situation. For this purpose, the noz­zles are equipped with a ball-and-socket joint.

The optimal angle of the nozzles depends on the mounting
height of the unit and on the floor surface to be reached.

1. Determine the diameter (D) of the floor surface that must
be reached;

2. Measure the mounting height (H) of the unit. This is the
distance between the floor and the underside of the unit;

3. From the table, read out the angle (α) at which the noz­zles must be set;

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Nozzle angle

D [m] 10 12.5 15 17.5 20 22.5

H [m]

3.0 423631272422

4.0 504439343128

5.0 - 50 45 41 37 34

6.0 --50 46 42 39

7.0 ---50 46 43

8.0 ----50 47

4. Snip off the adjustment aid 1 (supplied) along the dotted
line which corresponds to the correct angle (α);

5. Hold the snipped-off adjustment aid 1 against the unit and
turn the nozzle 2 against the underside of the adjustment
aid;

c Do not aim the nozzles at walls or other obstacles

(such as scaffolding).

6. Repeat step 5 for all nozzles.

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INSTALLATION GAS-FIRED AIR HEATER

2.7 Connecting the air supply and flue pipe

2.7.1 Special points regarding the air supply and flue pipe

Roof duct • Special duct sections and pipe components must be used

with the unit: the unit was approved with these compo­nents. The required components are specified in the
enclosed list of parts.

• Both the air supply and the flue pipe are routed to the out-

side world. These can be routed through both the wall and
the roof.

• With both the wall duct and the roof duct, the air supply

and flue pipe are combined.

Measurements of the air supply and flue pipe

COMPONENT SIZE

A 1,280 mm

B 500 mm

Ød 80 mm

ØD 125 mm

E 800 mm

F 180 mm

HOH 110 mm

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MANUAL FOR NOZ2 GAS-FIRED INSTALLATION

Warning:

Warning:

Wall duct

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2.7.2 Requirements for the air supply and flue pipe

w Danger of carbon monoxide formation and

flue gases. You must observe the following
rules:

• Only the pipe sections and feed-through conduits specified
for this unit may be used (specified in the list of compo­nents).

•The total equivalent length(specified in the list of com­ponents) of the parts must not be greater than the maxi-
mum feed-through length (specified in the technical
data).

• The air supply and flue pipes must not be burdened with
the weight of the unit.

• The air supply and the flue pipe must comply with all
nationally and locally applicable standards, regulations and
laws.

w The flue pipes become very hot.

• Make sure that the flue pipes cannot be touched, either by
placing them out of people’s reach, or by shielding them
off.

• Ensure that there are no combustible materials near the
flue pipes.

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2.7.3 Requirements for the condensate drain

condensate drain piece If the total extended length of the parts of the flue pipe

(specified in the list of components) is greater than the maxi-
mum dry flue length (specified in the technical data), a con­densate drain must be used.

This is subject to the following requirements:

• A condensate drain piece specified for this unit must be
used (specified in the list of components). This is fitted as
part of the pipe in the flue pipe.

• The condensate drain piece can be fitted both horizontally
and vertically. However, it should not be located further
away from the unit than the maximum dry length, so that
all condensation formed in the flue pipe can flow back into
it.

• If there are horizontal flue pipes beyond the condensate
drain piece, they must be installed at an angle of at least 3°,
so that all condensation formed in the flue pipe can flow
back into it.

• The water outlet of the condensate drain piece must be fit­ted with a trap. (The trap is specified in the technical data.)

• The condensate drain and the trap must comply with all
nationally and locally applicable standards, regulations and
laws.

w The trap must be filled with water, otherwise

flue gases can escape.

2.8 Connecting the unit to the gas supply

2.8.1 Special points regarding the gas connection

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w You must observe the following rules:

• A gas tap with valve (not supplied) must be within reach of
the unit.

• If the gas might contain particles or dust, a gas filter should
be applied.

• The gas connection must not be burdened with the weight
of the unit.

• The gas connection and the gas tap must comply with all
national and local applicable standards, regulations and
laws.

MANUAL FOR NOZ2 GAS-FIRED INSTALLATION

Caution:

2.8.2 Checking the gas connection

• Blow through the gas pipe, in accordance with the nation­ally and locally applicable standards, regulations and laws.

• Check the entire gas connection for leaks, in accordance
with the nationally and locally applicable standards, regula­tions and laws.

c When pressurising the connecting pipe above 60

mbar, the gas tap must be closed.

2.8.3 Connecting the gas supply

1. Connect the gas connection to 1.

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INSTALLATION GAS-FIRED AIR HEATER

2.9 Connecting the unit to the mains supply

2.9.1 Special points regarding the mains supply

w The unit must be earthed.
w The unit must be connected in accordance

with the applicable local requirements.

c For emergency situations and maintenance, it must

be possible to render the entire system electrically
dead.

Every unit has an isolation switch in order to render
the unit electrically dead in the event of emergency
situations and for maintenance.

w Also, do be sure to switch off the mains supply

if you are going to conduct maintenance on,
or make repairs to, electrical components.

2.9.2 Accessing the service compartment

About the service compartment

The service compartment contains, among other things:

• the burner

• the burner fan

• the control electronics and display

• electronic connections

• connections for the mains supply and the thermostat

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MANUAL FOR NOZ2 GAS-FIRED INSTALLATION

Warning:

Warning:

Caution:

Opening the service compartment

1. Remove the screws 1.

2. Open the front panel 2. You can remove it, if so desired.

3. Give lock 3 a quarter turn to the left.

4. Open the door 4.

w The service compartment contains hot and

electrically-live parts. Do not touch them
when the mains supply is on.

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2.9.3 Connecting the mains supply

w Make sure that the mains supply is switched

off.

1. Route the mains power cable through the free cable gland

1.

2. Connect the mains supply cable to the terminal block 2, in
accordance with the wiring diagram.

3. Tighten the cable gland.

c Do not switch on the mains supply yet.

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INSTALLATION GAS-FIRED AIR HEATER

2.9.4 Connecting the servomotor (accessory)

For models with automatic CHIPS control (Auto type)

If you have installed a damper module with servomotor
(accessories), you must connect this to the controller.

1. Connect the servomotor 1 in accordance with the elec-

trical diagram supplied.

For models with basic control (Basic type)

Connect the chosen motor for the damper module.

2.10 Installing the MultiTherm C clock thermostat

The gas burner in the unit is controlled by the MultiTherm C
clock thermostat.

2.10.1 Special points regarding the clock thermostat

• The gas burner in the unit is controlled by the MultiTherm
C clock thermostat. The clock thermostat is connected to
the control electronics in the unit by means of the Argus
Link bus system.

• Up to a maximum of 5 units can be connected to a single
clock thermostat.

• For special points regarding connection and the require­ments relating to the control cable, see the clock thermo­stat manual.

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MANUAL FOR NOZ2 GAS-FIRED INSTALLATION

Caution:

Warning:

2.10.2 Installing the clock thermostat

c Observe the following rules, otherwise errors may

occur:

• Follow the instructions given in the manual of the MultiTh­erm C clock thermostat.

• The control cable inside the unit must be shielded at all
times.

• The shielding of the control cable must ALWAYS and
ONLY be connected to the unit’s earth connection.

w Check that the unit is electrically dead.

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1. Install the clock thermostat in accordance with the rele­vant manual.

2. Route the control cable through the free cable gland 1.

3. Connect the control cable to the terminal block 2, in
accordance with the wiring diagram.

4. Tighten the cable gland.

5. Connect the control cable to the clock thermostat, in
accordance with the relevant manual.

6. If necessary, set the DIP switches on the control electron­ics in the air heater, in accordance with the clock thermo­stat manual.

Multiple units daisy chained with a single clock ther­mostat.

• Route the control cable to the next unit through the free
cable gland 3.

• Follow the instructions given in the manual of the MultiTh­erm C clock thermostat.

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3. . Commissioning

3.1 About commissioning

The procedure for commissioning should be performed in the
following situations:

• once when the unit is commissioned after installation;

• each time after maintenance or servicing work has been
performed on the unit;

• each time the unit is recommissioned after it has not been
used for extended periods of time.

The procedure – including all checks – must be performed
fully and in the described sequence.

Before starting, be sure to familiarise yourself with the cor­rect operation and functioning of the unit.

3.1.1 Safety instructions

w The unit may only be commissioned by

technically qualified personnel.

w Before you begin: read the safety instructions.

See also:

1.7.1 "Safety issues relating to installation, maintenance and ser-

vicing" on page 10

1.6.2 "Required skills" on page 8

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MANUAL FOR NOZ2 GAS-FIRED COMMISSIONING

Warning:

3.2 Checks before commissioning

w Check the following before commissioning

the unit. Only do so if all the conditions are
met.

• The unit must be fully installed and in compliance with all
regulations.

• All electrical connections, and all piping for the gas supply,
the air supply and the flue pipe must be present and in
good condition.

• All restrictions on use must have been complied with.

• It must be possible to use the unit safely, in accordance
with the safety instructions.

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See also:

2.3 "Determining the location of the unit" on page 14

1.7.2 "Safety in use" on page 11

1.6 "Restrictions on use" on page 8

2.7.2 "Requirements for the air supply and flue pipe" on page 21

2.7.3 "Requirements for the condensate drain" on page 22

2.8.1 "Special points regarding the gas connection" on page 22

2.9.1 "Special points regarding the mains supply" on page 24

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COMMISSIONING GAS-FIRED AIR HEATER

3.3 Operating mode

Service button 1 and status display 2 in the ser­vice compartment

The operating mode serves both to start the unit and to test
it.

w The service compartment contains hot and

electrically-live parts. Do not touch them
when the mains supply is on.

1. Keep the service button 1 pressed down for 10 seconds

in order to start the unit.

The unit begins to start up in low mode. The status dis­play 2 will display
which the unit will start shining in low mode.

2. Press the service button once again.

The unit will start operating in high mode. The display will
show

h alternately with a status code.

l alternating with status codes, after

3. Press the service button once again.

The unit will start working in normal mode. The unit will
always remain on for at least 4 minutes.

If the service button is not pressed for 5 minutes, the unit will
automatically switch to normal mode.

en-30

MANUAL FOR NOZ2 GAS-FIRED COMMISSIONING

3.3.1 Status codes on the status display

General status codes

S

TATUS CODE MEANING OPERATION

f summer ventilation The system fan is running because summer ventilation is

turned on.

f blinking Delta T regulation In low mode, the system fan runs in Delta T regulation

mode

l and code alternating low operating mode The system was started in low mode with the service

button. If the unit starts burning, it will do so in low
power mode.

h and code alternating high operating mode The system was started in high mode, using the service

button. If the unit starts burning, it will do so in high
power mode.

a and a number, alternating lock-out error In order to remove the error, this must be reset.
e and a number, alternating block-out error The error is automatically cancelled when the cause is

removed.

en

Status codes of the operation phases

STATUS CODE OPERATION STEP OPERATION

0 stand-by Ready for operation
1 pre-purging The system will carry out internal checks and a 30-sec-

ond air purge if there is enough air circulation.

2 ignition The igniter will spark for 5 seconds and the gas valve will

open. There should be flame detection within 5 seconds.

b burner on After a 15-second stabilisation period, the burner in the

unit will start at the desired power. The unit will remain
on for at least 4 minutes.

p post-operation ventilation The unit will after-cool the heat exchanger for 3 minutes

with the fan in low mode. The flue fan will continue to
ventilate for 1 minute.

3.4 Switching on and checking operation

3.4.1 Switching on the mains supply

1. Switch on the mains supply.

2. Set the isolation switch on the unit to position 1 (On).

Manual version 4.0 (06-12-2016) en-31

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COMMISSIONING GAS-FIRED AIR HEATER

3.4.2 Testing in operating mode

1. Turn on the gas tap.

2. Start the unit in operating mode by holding down the ser­vice button for 10 seconds, and check on the status dis­play that the unit starts up properly and starts to operate
in low mode.

3. Press the service button once again, and check on the sta­tus display that the unit is working properly in high mode.

4. Press the service button again, and wait until the unit is
ready for operation.

See also:

3.3 "Operating mode" on page 30

3.4.3 Starting in normal operation

In normal operation, the burner and the system fan are
started and stopped automatically. This is controlled by the
MultiTherm thermostat.

Starting up takes about 1 minute. The unit will always remain
on for at least 4 minutes.

The unit defaults to the Delta T regulation. (This is described
in the MultiTherm thermostat manual.)

3.4.4 Simulating an error in the gas burner

1. Simulate an error by turning off the gas tap.

2. Try restarting the unit by operating the thermostat, and
verify that the unit goes into error mode:

- The status display in the service compartment must dis-

play an error message (alternating code

- The thermostat must display an error message (code

3. Simulate solving the error by turning on the gas tap.

a and 1).

1).

en-32

4. Remove the error by briefly pressing the service button.

5. Restart the unit by operating the thermostat, and verify
that the unit is working correctly.

See also:

3.3 "Operating mode" on page 30

MANUAL FOR NOZ2 GAS-FIRED COMMISSIONING

Warning:

Warning:

Danger:

Caution:

3.4.5 Checking the flue gases

The unit has a sample aperture for checking the flue gases.
This is located on the connection of the flue pipe.

en

1. Measure the CO
for future reference.

value of the flue gases, and record them

2

w ALWAYS use a calibrated flue gas meter.

2. Verify that the measured CO
technical specifications of the unit.

value corresponds to the

2

w If the specifications do NOT match:

- Decommission the unit in accordance with
the instructions.

- Contact the supplier.

d NEVER try to adjust the gas burner, unless

you are instructed to do so by Biddle.

See also:

1.4.5 "Type plate" on page 7

3.4.6 Adjusting the discharge range

Adjust the discharge speed so that it produces the most opti­mal operation of the unit for the situation, both with and with­out heating.

1. Ensure that the nozzles are adjusted to the correct angle,
as described in 2.6 Regulating the discharge direction.

2. Via the clock thermostat, set the unit to operate without
heating.

3. Open the front panel.

- Remove the screws.

- Open the front panel. You can remove it, if so desired.

4. Adjust controller Rc to the lowest possible setting at
which the airflow still just reaches the ground. (Feel just
above the ground to see whether the airflow is reaching
the ground.)

c Do not turn the controller off.

Manual version 4.0 (06-12-2016) en-33

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Caution:

COMMISSIONING GAS-FIRED AIR HEATER

5. Via the clock thermostat, set the unit to operate with
heating.

6. Adjust controller Rh to the lowest possible setting at
which the airflow still just reaches the ground. (Feel just
above the ground to see whether the airflow is reaching
the ground.)

c Do not turn the controller off.

7. Close the front panel and fasten the screws.

See also:

2.6 "Regulating the discharge direction" on page 19

en-34

4. . Operation

4.1 General

For information about settings and operation, please consult
the manual for the MultiTherm C clock thermostat.

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Manual version 4.0 (06-12-2016) en-35

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Warning:

Danger:

5. . Decommissioning

5.1 About decommissioning

The unit must be put out of service in accordance with the
following procedure:

• if you want to switch off the unit and then not use it for a
long time;

• if you wish to perform maintenance or service work.

w When you re-commission the unit, follow the

5.2 Procedure for decommissioning

1. Allow the unit to stop by controlling it with the thermo­stat.

2. Allow the unit to cool down, and wait until both the fan
and the burner have stopped.

d NEVER interrupt the mains supply abruptly.

3. Set the isolation switch on the unit to position 0 (Off).

4. Disconnect the mains supply, using the isolation switch.

5. Turn off the gas tap.

prescribed procedure.

This can cause the unit to overheat.

en-36

6. . Errors

Danger:

Warning:

Note:

6.1 Resolving simple problems

en

d All work on the inside of the unit may only be

carried out by personnel who are technically
qualified to do so.

w Before you begin: read the safety instructions.

If you suspect an error, first try to resolve the problem, using
the table below.

n You do not have to be an expert in order to do this.

P

ROBLEM PROBABLE CAUSE WHAT TO DO

The unit does not work. The unit has no power supply. Check the mains supply.

The (set) room temperature has
been reached.

The fan has switched off the unit,
because the temperature has
become too high.

The unit is not discharging much air. The unit is set at too low a

strength.

The unit is not heating or not heat­ing sufficiently.

The unit is blowing out cold air. The (set) room temperature has

The unit is set at too low a
strength.

been reached. The unit is ventilating
unheated.

This is not an error. If necessary, set
a higher temperature.

1. Turn the unit off.

2. Allow the unit to cool down.

3. Turn the unit on.

Set the unit to a higher strength.

Set the unit to a higher strength.

This is not an error.

See also:

5 "Decommissioning" on page 36

6.2 "Reading out and resetting error messages" on page 38

Manual version 4.0 (06-12-2016) en-37

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Note:

Warning:

ERRORS GAS-FIRED AIR HEATER

6.2 Reading out and resetting error messages

Errors reported by the unit are shown on the status display 2
in the unit by means of an error code.

n You can also read out and reset error messages with

the MultiTherm thermostat. Consult the appropriate
manual.

There are two types of errors:

•(

a displayed alternating with a number)

In order to reset these errors: press briefly on the service
button 1.

•(

e displayed alternating with a number)

These errors are automatically cancelled when the cause
has been removed.

6.3 Remedying errors without an error message

If you suspect an error but no error message is displayed:

1. Using the preceding section, examine whether the prob­lem can be remedied in a simple manner.

2. Try to resolve the problem using the table below. Techni­cal expertise is required for this.

w The actions listed below may only be carried

out by personnel who are technically qualified
to do so.

en-38

MANUAL FOR NOZ2 GAS-FIRED ERRORS

Opmerking:

P

ROBLEM PROBABLE CAUSE WHAT TO DO

en

The unit does not work. The unit has not been put into

operation.

The unit is not receiving power. • Check that the isolation switch

There is no gas supply. Check the gas supply:

The air intake and/or the flue pipe
of the gas burner are blocked.

The unit is not discharging much air. The inlet and/or discharge section is

blocked.

The nozzles are not working opti­mally.

Put the unit into operation in
accordance with the procedure.

is set to position 1 (ON).

• Check the connections and
wiring of the power supply.

• is there a gas supply present?

• has the gas tap been opened?

Remove obstacles.

Remove obstacles.

Check the nozzles:

• Are the openings free of obsta­cles?

• Is the unit hanging at the cor­rect height?

• Are the nozzles set properly?

See also:

3 "Commissioning" on page 28

2.6 "Regulating the discharge direction" on page 19

6.4 Remedying errors that are accompanied by an error message

If the thermostat and/or the service display indicates an error,
then try to reset the error.

n Lock-out errors (type A) must be manually reset.

Block-out errors (type E) disappear as soon as the
cause has been removed.

If this does not resolve the issue, or if the problem occurs
repeatedly, then act as follows:

1. Note down the error code if one is displayed.

2. Decommission the unit in accordance with the prescribed
procedure.

3. Contact Biddle. Please report the error code when doing
so.

Manual version 4.0 (06-12-2016) en-39

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Gevaar:

Opmerking:

ERRORS GAS-FIRED AIR HEATER

d All work on the inside of the unit may only be

carried out by personnel who are technically
qualified to do so.

n In the event of malfunctions, always contact Biddle.

Lock-out errors

CODE MEANING PROBABLE CAUSE WHAT TO DO

A / 0 Internal error Faulty circuit board Replace the circuit board

A / 1 Flame detection

error

A / 2 Heat exchanger too

hot.

A / 3 Sensor error The two internal temperature

A / 4 Ionisation protection Flame goes out often. • See actions listed under error A / 1

A / 5 Internal error Faulty circuit board Replace the circuit board.

A / 6 Safety relay error The safety relay does not

A / 7 Flame protection A flame is being falsely

No flame • Check the gas pressure.

• Check the gas/air mixture and the setting
of the gas valve.

• Check the power supply to the gas valve.

• Check whether the ignition electrode is
producing a spark.

Flame keeps going out. • Check the ionisation electrode and the

cabling. (The resistance of the ignition cable
is approx. 1 kOhm.

• Check the earth connection of the unit.

• Check the control system.

The heat exchanger has
become too hot.

sensors are differing too
much.

switch.

detected.

• Check the fans.

• Check the settings of the gas valve.

• Turn the sensor a quarter turn, so that the
temperature is measured at a different
point.

• Measure the resistance of each sensor. This
should be 20K at 25° and 25K at 20°.
Replace the resistor if it differs too much
from this.

• Check the earth connection of the unit.

• Check the settings of the gas valve.

• Check the flue gas channel for blockages.

• Check plug J4.

• Check the bridge between contacts 5 and

11.

• Replace the circuit board.

Check the ionisation plug and the cables.

en-40

MANUAL FOR NOZ2 GAS-FIRED ERRORS

CODE MEANING PROBABLE CAUSE WHAT TO DO

A / 8 Fan error:

The burner fan does
not rotate, or does

The burner fan is not receiv­ing power.

The burner fan is blocked. • Check whether the burner fan can rotate

not rotate at the cor­rect speed.

A / 9 Pressure switch error Insufficient transportation of

combustion gases through the
heat exchanger.

• Check the wiring.

• Check the motor.

freely.

• Check the flue fan for dirt.

• Check the heat exchanger for flue gas leak­age.

• Check the connection and operation of the
pressure switch.

Block-out errors

CODE MEANING PROBABLE CAUSE WHAT TO DO

E / 0 Internal error Faulty circuit board Replace the circuit board

E / 1 1

st

temperature

safety device

The heat exchanger has become
too hot.

• Check the fans.

• Check the settings of the gas valve.

E / 2 Selection resistor Unit recognition does not work. • Check the connection of the selection

E / 3

resistor to the circuit board.

• If necessary, fit a new unit selection.

E / 9 Reset button error The reset button has been

pressed too often within a short
period.

• After a waiting period, the error disap­pears automatically.

• Possibly switch the unit off so that it
electrically dead for a brief period.

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Manual version 4.0 (06-12-2016) en-41

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Warning:

7. . Maintenance

7.1 Daily inspection

Biddle recommends that you perform these checks during eve­ryday use. Visual observation is sufficient here. Specific exper­tise is not required.

• Check that the fan is running.

• Check the thermostat for error messages.

• Check that the inlet and discharge openings are not
blocked by objects or dirt; Remove these if necessary.

7.2 Scheduled maintenance

See also:

3.3 "Operating mode" on page 30

w The activities listed below may only be

carried out by personnel who are technically
qualified to do so.

7.2.1 Inspection and preventive maintenance once a

year

The following checks and maintenance activities must be per­formed annually by qualified technical staff.

• Inspect the casing, the suspension or mounting structure,
and the securing of the unit.

• Inspect the gas lines.

• Inspect the air intake opening and the flue pipe.

• Inspect all wiring between the components in the unit, and
the mains supply.

• Check the inlet and discharge openings for dirt and clean
them if necessary.

• Inspect the inside of the burner and clean it if necessary.

• Inspect the ignition electrode, and adjust if necessary.

en-42

• Check that the safety shut-off valve is gastight.

MANUAL FOR NOZ2 GAS-FIRED MAINTENANCE

Warning:

Warning:

Caution:

• Clean the trap of the condensate drain and refill it with
water.

w The trap must be filled, otherwise flue gases

can escape.

en

7.3 Inspecting the gas burner

• Measure the CO
they comply with the technical specifications.

See also:

1.7.1 "Safety issues relating to installation, maintenance and ser-

vicing" on page 10

7.3 "Inspecting the gas burner" on page 43

7.4 "Adjusting the ignition electrode" on page 45

7.5 "Cleaning the unit" on page 45

3.4.5 "Checking the flue gases" on page 33

value of the flue gases, and ensure that

2

w The activities listed below may only be

carried out by personnel who are technically
qualified to do so.

The gas burner should be internally inspected and cleaned out
annually by technically qualified staff.

Removing the burner 1. Decommission the unit in accordance with the instruc-

tions.

2. Open the service compartment.

3. Loosen the 6 socket screws 1.

4. Remove the burner 2, including the flange and the premix
fan.

5. Check the inside of the heat exchanger for dirt or damage.

6. Check the burner for damage.

7. If necessary, clean the ignition electrode with fine sandpa­per.

c Do not bend the electrode.

Manual version 4.0 (06-12-2016) en-43

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Caution:

Caution:

MAINTENANCE GAS-FIRED AIR HEATER

8. Check air supply and air discharge.

9. If necessary, clean the inside of the burner with a vacuum
cleaner.

10. If the outside of the heat exchanger is very dirty: clean it
with a soft brush.

c Never use a steel brush.

11. Clean the fan grille with a vacuum cleaner and a brush.

12. Replace the burner.

c Use new gaskets.

13. Commission the unit and check its operation in accord­ance with the instructions.

See also:

3 "Commissioning" on page 28
5 "Decommissioning" on page 36

1.7.1 "Safety issues relating to installation, maintenance and ser-

vicing" on page 10

3.2 "Checks before commissioning" on page 29

8.1.2 "Accessing the gas burner" on page 48

8.1 "Access" on page 47

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MANUAL FOR NOZ2 GAS-FIRED MAINTENANCE

Caution:

7.4 Adjusting the ignition electrode

en

Correct distance between the electrode and the
burner (in mm)

Correct distance between the electrodes mutually (in
mm)

In order to ignite the gas burner, the ignition electrode must
be properly adjusted. The spark must be formed between the
two electrodes, but must not arc over from the electrode to
the burner. Improper adjustment can result in violent ignition.

In order to reach the ignition electrode:

7.5 Cleaning the unit

• Open the service compartment.

• Loosen screws 1 and remove the electrodes 2, or take

the burner out in its entirety.

See also:

8.1 "Access" on page 47

8.1.2 "Accessing the gas burner" on page 48

You can clean the exterior of the unit with a damp cloth and a
domestic cleaning agent. Do not use any solvents.

c Make sure that no water runs into the unit.

Manual version 4.0 (06-12-2016) en-45

MAINTENANCE GAS-FIRED AIR HEATER

en-46enManual version 4.0 (06-12-2016) en-47

8. . Servicing

Warning:

Warning:

en

w Servicing activities may only be carried out by

personnel who are technically qualified to do
so.

w Before you begin: read the safety instructions.

See also:

1.7.1 "Safety issues relating to installation, maintenance and ser­vicing" on page 10

1.6.2 "Required skills" on page 8

8.1 Access

8.1.1 Accessing the service compartment

About the service compartment

The service compartment contains, among other things:

• the burner

• the burner fan

• the control electronics and display

• electronic connections

• connections for the mains supply and the thermostat

en

Warning:

SERVICING GAS-FIRED AIR HEATER

Opening the service compartment

1. Remove the screws 1.

2. Open the front panel 2. You can remove it, if so desired.

3. Give lock 3 a quarter turn to the left.

4. Open the door 4.

w The service compartment contains hot and

electrically-live parts. Do not touch them
when the mains supply is on.

8.1.2 Accessing the gas burner

The gas burner contains:

• the ignition electrode

• the burner bed

Removing the burner

1. Open the service compartment.

2. Loosen the 6 socket screws 1.

3. Remove the burner 2 with fan and all.

See also:

8.1 "Access" on page 47

en-48

MANUAL FOR NOZ2 GAS-FIRED SERVICING

8.1.3 Removing the discharge cone

The system fan is located in the discharge cone.

Disconnecting the discharge cone In order to remove it:

•Remove screw 1.

• Slightly loosen the screws 2.

• Turn the cone slightly and remove it.

en

8.2 Fuses

Specifications of the fuses

LOCATION DESCRIPTION SPECIFICATION

1 fuses F1 and F2 for the

electronics

2 fuses F7 and F8 for the

power supply

T 5A (2x)

T 3.15 A (2x)

Manual version 4.0 (06-12-2016) en-49

SERVICING GAS-FIRED AIR HEATER

en-50enManual version 4.0 (06-12-2016) en-51

9. . Dismantling

The dismantling of the installation and the handling of the
coolant, oil and other components must be done by a quali­fied fitter in conformity with the relevant local and national
legislation and regulations.

Pursuant to EU legislation, used electrical and electronic appli­ances must be collected for recycling. By ensuring that this
product is disposed of in the correct manner, you are helping
to prevent potential negative consequences for the environ­ment and public health. For more information about this,
please contact your supplier or the relevant government
authority.

en

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DISMANTLING GAS-FIRED AIR HEATER

en-52

10. Addresses

If you have any comments or queries relating to this product,
please do not hesitate to contact your Biddle branch.

en

Biddle bv

P. O. B o x 1 5
9288 ZG Kootstertille
The Netherlands

T [phone]
E [e-mail]
I www.biddle.nl

Biddle nv

Battelsesteenweg 455 B
2800 Malines
Belgium

T [phone]
E [e-mail]
I www.biddle.be

Biddle Air Systems Ltd.

St. Mary’s Road, Nuneaton
Warwickshire CV11 5AU
United Kingdom

T [phone]
E [e-mail]
I www.biddle-air.com

Biddle GmbH

Emil-Hoffmann-Straße 55-59
50996 Cologne
Germany

T [phone]
E [e-mail]
I www.biddle.de

Biddle France

21 Allée des Vendanges
77183 Croissy Beaubourg
France

T [phone]
E [e-mail]
I www.biddle.fr

Manual version 4.0 (06-12-2016) en-53

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GAS-FIRED AIR HEATER

. . . Keywords

A

accessories . . . . . . . . . . . . . . . . . . . . . . . . . 8

addresses . . . . . . . . . . . . . . . . . . . . . . . . . 53

adjusting ignition electrode . . . . . . . . . . . 45

adjusting the nozzle angle . . . . . . . . . . . . 19

air supply . . . . . . . . . . . . . . . . . . . . . . . . . 20

C

capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

CE declaration . . . . . . . . . . . . . . . . . . . . . . 7

cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . 45

commissioning . . . . . . . . . . . . . . . . . . . . . 28

components list . . . . . . . . . . . . . . . . . . . . . 6

condensate drain . . . . . . . . . . . . . . . . . . . 22

connecting power supply. . . . . . . . . . . . . 24

D

decommissioning . . . . . . . . . . . . . . . . . . . 36

delivery inspection . . . . . . . . . . . . . . . . . . 12

designations . . . . . . . . . . . . . . . . . . . . . . . . 5

determine location . . . . . . . . . . . . . . . . . 14

disabling . . . . . . . . . . . . . . . . . . . . . . . . . . 36

discharge range . . . . . . . . . . . . . . . . . . . . 33

dismantling . . . . . . . . . . . . . . . . . . . . . . . . 51

G

gas supply. . . . . . . . . . . . . . . . . . . . . . . . . 22

gas type . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

I

inspecting gas burner . . . . . . . . . . . . . . . 43

installation . . . . . . . . . . . . . . . . . . . . . . . . 12

clock thermostat . . . . . . . . . . . . . . . 26

roof cowl . . . . . . . . . . . . . . . . . . . . . 15

ventilation duct . . . . . . . . . . . . . . . . 17

installing ventilation duct. . . . . . . . . . . . . 17

M

mains supply . . . . . . . . . . . . . . . . . . . . . . 24

maintenance. . . . . . . . . . . . . . . . . . . . . . . 42

modifications . . . . . . . . . . . . . . . . . . . . . . . 7

MultiTherm C clock thermostat. . . . . . . 26

O

operating mode . . . . . . . . . . . . . . . . . . . . 30

operation . . . . . . . . . . . . . . . . . . . . . . . . . 35

P

E

errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

delete . . . . . . . . . . . . . . . . . . . . . . . . 38

reading out. . . . . . . . . . . . . . . . . . . . 38

F

flue pipe . . . . . . . . . . . . . . . . . . . . . . . . . . 20

fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

en-54 B

problems . . . . . . . . . . . . . . . . . . . . . . . . . 37

product series . . . . . . . . . . . . . . . . . . . . . . 7

R

regulating the discharge direction. . . . . . 19

restrictions on use . . . . . . . . . . . . . . . . . . 8

roof cowl

mounting . . . . . . . . . . . . . . . . . . . . . 15

mounting to unit . . . . . . . . . . . . . . . 18

MANUAL FOR NOZ2 GAS-FIRED

S

safety instructions

installation. . . . . . . . . . . . . . . . . . 10, 12

maintenance . . . . . . . . . . . . . . . . 10, 37

servicing . . . . . . . . . . . . . . . . . . . 10, 47

usage . . . . . . . . . . . . . . . . . . . . . . . . . 11

service button. . . . . . . . . . . . . . . . . . . . . . 30

servicing . . . . . . . . . . . . . . . . . . . . . . . . . . 47

servomotor. . . . . . . . . . . . . . . . . . . . . . . . 26

status display. . . . . . . . . . . . . . . . . . . . . . . 30

strength. . . . . . . . . . . . . . . . . . . . . . . . . . . 33

suspension. . . . . . . . . . . . . . . . . . . . . . . . . 15

switching ON . . . . . . . . . . . . . . . . . . . . . . 31

symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

en

T

technical data . . . . . . . . . . . . . . . . . . . . . . . 6

type code . . . . . . . . . . . . . . . . . . . . . . . . . . 6

type designation . . . . . . . . . . . . . . . . . . . . . 6

type plate . . . . . . . . . . . . . . . . . . . . . . . . . . 7

W

wiring diagram . . . . . . . . . . . . . . . . . . . . . . 6

Z

zekeringen. . . . . . . . . . . . . . . . . . . . . . . . . 49

Manual version 4.0 (06-12-2016) en-55

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Copyright and Trademarks

All information and drawings contained in this manual are the property of Biddle and may not be used (other than
for the purpose of operating the unit), photocopied, reproduced, translated and/or communicated to third parties
without prior written permission from Biddle.

The name Biddle is a registered trademark of Biddle bv.

Warranty and liability

For the warranty and liability provisions and terms, please refer to the terms & conditions of sale and supply.

At all times, Biddle shall not be held liable for consequential damages.

Liability as regards the manual

Although great care has been taken to ensure the correct and, where necessary, complete description of the
relevant components, Biddle shall not be held liable for damages as a consequence of errors and/or imperfections
in this manual.

Biddle reserves the right to alter the specifications as mentioned in this manual.

Should you nevertheless discover any errors or ambiguities in the manual, we shall be glad to learn that from you.
It helps us to improve the documentation still further.

For more information

If you have any comments or queries relating to this product, please do not hesitate to contact Biddle. You will find
the contact information for your Biddle branch in chapter 10 Addresses.

Biddle bv

P.O. Box 15
9288 ZG Kootstertille
The Netherlands

T [phone]
E [e-mail]
I www.biddle.nl

Name and telephone number of installer: