Biddle NOZ2 G User manual

a
Manual
Gas-fired air heater
Model NOZ2 G
Version 4.0
Original Manual English

GAS-FIRED AIR HEATER
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. . . 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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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 NOZ2G. It also
provides tips and information for servicing activities and for
the remedying of errors.
1.1.1 Countries where manual is applicable
This manual is applicable in countries with the following coun-
try codes:
BE, DE, FR, GB, NL
If a country code for another country is listed on the packag-
ing and/or type plate of the unit, please contact your supplier.
1.2 How to use this manual
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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1.3 How to read this manual
1.3.1 Designations used in the manual
The following symbols are used in the manual:
Note:
nRefers to an important section in the text.
Caution:
cIf you do not carry out the procedure or action
correctly, you may cause damage to the unit.
Follow the instructions precisely.
Warning:
wIf you do not carry out the procedure or
action correctly, you may cause physical injury
and/or damage.
Follow the instructions precisely.
Danger:
dIs 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.
SYMBOL DESCRIPTION
wYou have accessed a section of the unit containing components which carry
a voltage.
Access restricted to qualified maintenance staff only.
Caution is required.
wThis surface or component may be hot. Risk of burns on contact.

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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 com-
bustion 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.
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: NOZ225-G20/3.

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Explanation of the type code
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
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.
T
YPE CODE ELEMENT DESIGNATION MEANING
product series NOZ2general 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
DESIGNATION DESCRIPTION
Type complete type code of the unit
Noorder 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
CO2CO2control value of the flue gases
U power supply voltage
I max maximum current (per phase)
P maximum power consumption
M weight of unit

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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 sup-
plied.
1.5.3 Components not supplied
The following components required for installation must be
obtained from third parties:
• threaded rods
• other cabling
1.6 Restrictions on use
1.6.1 General restrictions
Warning:
wThe unit may only be used if all these
conditions have been met:
• The unit must be installed and maintained by qualified tech-
nical staff.
• The unit must be installed in accordance with the instruc-
tions.
• 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.
• 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.
Danger:
dNEVER attempt to perform installation,
maintenance, or servicing work on the unit
unless you are sufficiently qualified.

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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
1.6.4 Type of gas
• 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: con-
tact Biddle.
Danger:
dNEVER 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 COUNTRY
BE Belgium
DE Germany
FR France
GB United Kingdom
NL The Netherlands
CODE TYPE OF GAS
G20 natural gas
G25 natural gas
G31 propane

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1.6.5 Field of application
• The unit may only be used indoors.
• The unit is suitable only for dry and non-dusty environ-
ments.
• The unit may not be used in an environment in which cor-
rosive or chemically aggressive gases or vapours are pre-
sent.
• 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
Danger:
dNEVER try working on the unit unless you are
technically qualified.
Warning:
wWhen 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.
Warning:
wIf 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.
Warning:
wDo not break any seals.
See also:
5 "Decommissioning" on page 36

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1.7.2 Safety in use
Danger:
dNEVER put any objects into the inlet and
discharge openings of the unit.
Danger:
dNEVER block the inlet and discharge openings
of the unit, otherwise overheating may occur.
Warning:
wThe surface of the unit and the flue pipe can
become hot. Keep flammable materials away
from it.
Warning:
wKeep flammable materials out of the range of
the discharge of the unit.
Warning:
wIf 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.
Caution:
cAlways 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
Warning:
wInstallation activities may only be performed
by technical staff qualified for this purpose.
Warning:
wBefore starting installation: 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
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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2.1.2 Check before installation
Warning:
wCheck 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 cor-
respond 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
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
Warning:
wObserve the following rules. Take into
account the safety dimensions.
• The unit may only be installed and used in rooms with ade-
quate 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:
• 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
SIZE DESCRIPTION VALUE
H minimum mounting height 280 cm
I minimum distance between ceiling and
unit (with inlet from room)
70 cm
J minimum distance to walls 3 m
S minimum required free discharge range 50 cm
M required free space for maintenance 50 cm

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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
1. Make a hole in the roof.
2. Make a curb 1around the hole.
3. Fit roof covering over the curb.
4. Remove the top 3of the roof cowl by loosening the bolts.
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 3onto the roof cowl.
8. Seal all cracks between the roof cowl and the roof with a
draught-free and leak-proof finish.
2.5 Hanging the unit up
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
2. Onto each threaded rod, screw two bolts a few centime-
tres apart.
NOZ225
conduit 575 x 575 mm
NOZ225
distance between threaded rods 710 x 640 mm
screw thread M8

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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 plat-
ing.
Warning:
wThe suspended unit must be secured.
2.5.2 Mounting the damper module (accessory)
1. Place the flange 1of the damper module over the flange
2of the unit.
2. Attach the flanges together, using 12 screws 3.

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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 1over the flange 2of 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
Caution:
cThe 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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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 noz-
zles 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 noz-
zles must be set;
Nozzle angle
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 1against the unit and
turn the nozzle 2against the underside of the adjustment
aid;
Caution:
cDo not aim the nozzles at walls or other obstacles
(such as scaffolding).
6. Repeat step 5 for all nozzles.
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

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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 compo-
nents. 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