Reznor 12, 20, LCSA-4 Series, 30, 50 Installation Commissioning Servicing & User Instructions

1610LCSA-4--EN

Gas-Fired, Balanced-Flue or
Power-Vented Unit Heater

LCSA-4

Installation, commissioning, servicing & user instructions

These appliances meet the following EC Directives

DIR 2009/142/EC: GAD
DIR 2004/108/EC: EMC

DIR 2006/95/EC: LVD

DIR 2006/42/EC MD

Applies to

Austria, Belarus, Bulgaria, China, Czech Republic, Croatia, Cyprus, Denmark, England, Estonia, Finland,

Germany, Greece, Hungary, Iceland, Latvia, Lithuania, Montenegro, New Zealand, Norway, Poland, Romania,

Russian Federation, Serbia, Slovakia, Slovenia, South Africa, Spain, Sweden, Turkey, Ukraine

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause property
damage, injury, or death. All work must be carried out by appropriately qualified persons.
The manufacturer does not take any responsibility in the event of non-observance of the
regulations concerning the connection of the apparatus causing a dangerous operation of the
apparatus, possibly resulting in damage to the apparatus and/or environment in which the unit
is installed.

Please read this document carefully before commencing installation commissioning and/or
servicing.
Leave it with the user or attached to the appliance or gas service meter after installation.

Subject to modifications

1/25

TABLE OF CONTENTS

1.0 INTRODUCTION

1.1 Basic Information

1.2 Warranty

2.0 TECHNICAL DATA

2.1 Specifications

2.2 Dimensions

3.0 GENERAL REQUIREMENTS

3.1 Related Documents

3.2 Heater Location

3.3 Combustion Air Inlet Pipe and Flue Pipe

3.4 Air Supply

3.5 Air Distribution System

3.6 Electrical Supply

3.7 Gas Supply

4.0 INSTALLATION

4.1 Uncrating and Preparation

4.2 Suspending the Heater

4.3 Fitting the Combustion Air Inlet/Flue Pipe System

4.3.1 Fitting the Flue Pipe

4.3.2 Fitting the Combustion Air Socket Guard - Type B Installation

4.3.3 Fitting the Combustion Air Pipe - Type C Installation

4.4 Gas Connection

4.5 Electrical Connections

4.6 Room Thermostat Siting

5.0 AIR DISTRIBUTION

6.0 COMMISSIONING AND TESTING

6.1 Electrical Check

6.2 Gas Connection

6.3 Suspension and Support

6.4 Lighting the Heater

6.4.1 To Turn the Heater ON

6.4.2 To Turn the Heater OFF for Short Periods

6.4.3 To Turn the Heater OFF for Long Periods

6.5 Heater pipe work

6.6 Adjustments

6.7 Air Distribution System

6.8 Heater Controls

6.9 Handing Over

7.0 SERVICING INSTRUCTIONS

8.0 REMOVAL AND REPLACEMENT OF PARTS

8.1 Main Burner Removal

8.2 Main Burner Injectors

8.3 Ignition System

8.4 Operating Gas Valve

8.5 Limit Controls

8.6 Combustion Air Pressure Switch

8.7 Combustion Air Fan

9.0 FAULT FINDING

10.0 PARTS LIST

11.0 GAS CONVERSION

12.0 USERS INSTRUCTIONS

13.0 HEALTH & SAFETY STATEMENT

2/25

HAZARD INTENSITY LEVELS

DANGER

danger

WARNING

CAUTION

Failure to comply will result in
severe personal injury or
death and/or property
damage.

Failure to comply could result
in severe personal injury or
death and/or property damage

Failure to comply could result
in minor personal injury and/or
property damage.

INTRODUCTION

1

WARNING: The electrical isolator should
only be used in an emergency and should
not be used for closing down the main
burner, as it switches off the fan
prematurely and may damage the heat
exchanger, invalidating the warranty.

Attention :
This appliance is not intended for use by
persons (including children) with reduced
sensory or mental capacities, or lack of
experience and knowledge, unless they have
been given supervision or instruction
concerning use of the appliance by a person
responsible for their safety.
Children should be supervised to ensure that
they do not play with the appliance.

1.1 Basic Information

The instructions in this manual apply to Model LCSA­4 gas-fired/fan-assisted warm air heaters. These
models have an axial fan for air delivery. These
heaters are designed for overhead suspension and
are suitable for indoor installation only installed at an
operation ambient temperature between -15°C and
45°C. When installed as a type C12/C32 and where
the height above floor level is greater than 1.8
meters measured to the underside of the appliance
they may be used as a garage air heater. This
appliance must be installed in accordance with the
rules in force. Before installation, check that the
local distribution conditions, nature of gas and
pressure and adjustment of the appliance are
compatible.

A permanent electricity supply of 230 volts, 50 Hz,
single phase is required.
Heaters are approved for:

Type C
Type C
Type B

When the external control calls for heat, an
electronic control begins the ignition sequence to
provide for a safe start. About 30 seconds after the
call for heat, the fan will begin circulating warm air.
The electronic control will supervise the flame during
the entire heating cycle to ensure safe operation.
When the required room temperature is reached, the
main burner will shut down leaving the fan running to
cool down the heat exchanger. After approximately
45 seconds, the fan delay relay will turn off the fan.

- horizontal vent for balanced-flue heaters;

12

- vertical vent for balanced-flue heaters;

32

- vertical vent;

22

1.2 Warranty : Warranty is void if:

a) LCSA-4 heaters are installed in atmospheres containing flammable vapors or atmospheres

containing chlorinated or halogenated hydrocarbons or atmospheres containing any silicone,

aluminum oxide, etc., that adheres to spark ignition flame sensing probes.
b) The installation is not in accordance with these instructions.
c) Axial fan-type unit heater is connected to a duct system or fitted with a non-authorized air

distribution device.

3/25

2

TECHNICAL DATA

2.1 Specifications

Table 1a

LCSA-4 12 20 30 35 45 50 60 75 100 120 145

Gas category

Comb. Air & Flue, type B
Comb. Air & Flue, type C

(1)

(1)

Connection c ollars mm 80 100 100 130 130 130 130 130 130 130 130
Heat input Hs kW 13,33 26,42 31,63 43,95 54,38 61,08 73,25 87,85 114,87 144,81 165,47
Heat input Hi kW 12,00 23,80 28,50 39,60 49,00 55,00 66,00 79,15 103,50 130,40 149,00
Heat output kW 11,14 21,82 25,99 36,23 44,64 50, 77 60,92 73,13 94,50 119,32 137,39
Thermal Efficiency % 93,00 92,00 91,00 92,00 91,00 92,00 92,00 92,00 91,00 92,00 92,00
Gas c onsumption G20
Gas c onsumption G31

Gas cons um ption Lw (20mb ar)
Gas cons um ptio n Ls (13m bar)

Gas pipe connection
Real temperature rise
Air flow measured

(2)

(3)

(3)

m³/h 1,27 2,52 3,02 4,19 5,19 5,82 6,98 8, 38 10,95 13,80 15,77
kg/h NA 1,86 2,22 3,09 3,82 4,29 5,15 6,17 8,24 10,17 11,62
m³/h NA 3,07 3,68 5,11 6,32 7,10 NA 10,22 NA NA NA

(*)

m³/h NA 3,50 4,19 5,82 7,20 8,08 NA 11,63 NA NA NA

(*)

1/2"

K 30 31 33 33 313034 29 29 32 35

m³/h 1100 2000 2300 3200 4300 5000 5200 7300 8000 10800 11400

Nominal motor speed RPM 1381 1256 1333 1300 1310 928 1346 1344 935 872 875

Recommended mounting height
Horizontal t hrow
Sound Press ure
Sound Press ure

(5)

(6)

(7)

m2,5

m9,5
dB(A) 36
dB(A) 43

3 4 44455566
13 17 24 25 27 30 32 31 38 39
42 37 46 45 45 47 48 52 54 56
49 44 53 52 52 54 55 59 61 63

(4)

Elec trical service (protec tion IP20)
Total elec trical rating W 530
Weight kg 59

(*) : only fo r Polan d

(1) Gas A ppliance Class ific atio ns fo r Aprro ved Venting M ethods based o n CEN-repo rt CR1749:2001

(2) There is a difference between the gas co nnect io n diameter and the diamet er o f the supply line. Always use t he mo st adequate diam eter o f the supply

line to minimize the pressure dro p through the gas pipes - if necessary, reduce the diameter o f the supply line at the inlet o f the unit.

(3) Figure fo r iso therm al co nditions.

(4) Height f ro m flo or t o bo tto m surf ace of heater. These are recomm andatio ns o nly. Po sitio ning of unit heaters f o r proper perf ormance is applicat ion dependent.

Care sho uld be taken to avo id mount ing the heaters abo ve t hese reco mm endatio ns, unless downturn nozzle opt io ns are used, as significant stratification may

occur resulting in poo r floo r co verage and higher energy los ses thro ugh the ro of s tructure.

(5) Isot hermal co nditio ns at 20°C ambient air t emperature, discharge lo uvre zero def lectio n, v = 0,5 m/s. The air thro w will be influenced by the height o f t he

building, mounting height o f the unit, ambient temperature & adjustment o f t he louvres.

(6) Sound pressure level in dB(A) in free field co nditions , measured at 5 metres from the unit

(7) Sound pressure level in dB(A), measured at 5 m etres fro m the unit with A =160m² and Q=2

360 250 370 370 540 760 760 850 1730 1730

59 64 94 99 114 114 126 184 242 279

Table 1b : Gas categories

Country Gas category Country Gas category

Austria II2H3P Montenegro II2H3+

Belarus II2H3+ New Zealand II2H3+

Bulgaria I2H or I3P Norway II2H3 B/P

China II2H3+ Poland II2E3P

Czech republic II2H3+ Portugal II2H3+

Croatia II2H3P Romania II2H3 B/P

Cyprus II2H3+ Russian Federation I2H or I3P

Denmark II2H3 B/P Serbia II2H3+

England II2H3+ Slovakia II2H3+

Estonia II2H3+ Slovenia II2H3+

Finland II2H3 B/P South Africa II2H3+

Germany I2ELL Spain II2H3+

Greece II2H3+ Sweden II2H3 B/P

Hungary II2HS3P Turkey II2H3+

Iceland II2H3+ Ukraine I2H or I3P

Latvia II2H3+

Lithuania II2H3+

4/25

see table 1B

B22P

C12, C42, C62

3/4"

230/240V 1N ~ 50Hz

Table 2 :Injector size and burner pressures

Belarus, China, Croatia, Czech Republic, Cyprus, England, Estonia, Greece, Iceland, Latvia, Lithuania, Montenegro, New Zealand, Portugal, Serbia, Slovenia,
Slovakia, South Africa, Spain , Turkey, Poland

LCSA-4

Injector quantity 5 5 6 8 10 8 8 10 12 10 12

Injector size

G20

Burner pressure (1) mbar 8,10 8,00 7,25 7,10 6,90 9,20 8,50 8,30 7,50 9,20 9,00

Nat. Gas

Inlet pressure mbar

Injector quantity - 5 6 8 10 8 8 10 12 10 12

Injector size

G31

Burner pressure (1) mbar - 35,80 35,80 36,20 35,90 30,10 35,60 35,40 34,40 30,70 30,60

Prop. Gas

Inlet pressure mbar

Special poland

LCSA-4

Injector quantity - 5 6 8 10 8 - 10 - - -

Injector size

G27

Burner pressure (1) mbar - 8,30 8,20 8,35 8,25 11,40 - 9,25 - - -

Inlet pressure mbar

Injector quantity - 5 6 8 10 8 - 10 - - -

Injector size

G2,350

Burner pressure (1) mbar - 8,25 8,45 9,55

Inlet pressure mbar

Model1220303545506075100120145

mm 1,50 2,10 2,10 2,20 2,20 2,40 2,70 2,70 2,90 3,40 3,40

marking 150 210 210 220 220 240 270 270 290 340 340

20

mm - 1,15 1,15 1,15 1,15 1,40 1,45 1,45 1,50 1,95 1,90

marking - 115 115 115 115 140 145 145 150 195 190

37

Model1220303545506075100120145

mm - 2,40 2,40 2,40 2,40 2,60 - 3,00 - - -

marking - 240 240 240 240 260 - 300 - - -

20

mm - 2,60 2,60 2,50

marking - 260 260 250

2,60 3,40

260 340

8,40 6,00

13

-

3,90

-

390

-

5,25

---

---

---

Austria, Germany, Hungary, Russian Federation, Ukraine

LCSA-4

Injector quantity 5** 5 6 8 10 8 8 10 12 10 12

Injector size

G20

Burner pressure (1) mbar 8,10 8,00 7,25 7,10 6,90 9,20 8,50 8,30 7,50 9,20 9,00

Nat. Gas

Inlet pressure mbar

Injector quantity - 5 6 8 10 8 8 10 12 10 12

Injector size

G31

Burner pressure (1) mbar - 35,80 35,80 36,20 35,90 30,10 35,60 35,40 34,40 30,70 30,60

Prop. Gas

Inlet pressure mbar

(* ): Inlet pressure for Hungary = 25mbar

(**): no nat gas for Germany

Bulgaria, Denmark, Finland, Norway, Sweden

LCSA-4

Injector quantity 5 5 6 8 10 8 8 10 12 10 12

Injector size

G20

Burner pressure (1) mbar 8,10 8,00 7,25 7,10 6,90 9,20 8,50 8,30 7,50 9,20 9,00

Nat. Gas

Inlet pressure mbar

Injector quantity - 5 6 8 10 8 8 10 12 10 12

Injector size

G31

Burner pressure (1) mbar - 28,06 28,06 28,37 28,14 23,59 27,90 27,75 26,96 24,10 24,00

Prop. Gas

Inlet pressure mbar

Model1220303545506075100120145

mm 1,50 2,10 2,10 2,20 2,20 2,40 2,70 2,70 2,90 3,40 3,40

marking 150 210 210 220 220 240 270 270 290 340 340

mm - 1,15 1,15 1,15 1,15 1,40 1,45 1,45 1,50 1,95 1,90

marking - 115 115 115 115 140 145 145 150 195 190

Model1220303545506075100120145

mm 1,50 2,10 2,10 2,20 2,20 2,40 2,70 2,70 2,90 3,40 3,40

marking 150 210 210 220 220 240 270 270 290 340 340

mm - 1,15 1,15 1,15 1,15 1,40 1,45 1,45 1,50 1,95 1,90

marking - 115 115 115 115 140 145 145 150 195 190

20(*)

50

20

30

Romania

LCSA-4

Injector quantity 5 5 6 8 10 8 8 10 12 10 12

Injector size

G20

Burner pressure (1) mbar 8,10 8,00 7,25 7,10 6,90 9,20 8,50 8,30 7,50 9,20 9,00

Nat. Gas

Inlet pressure mbar

Injector quantity - 5 6 8 10 8 8 10 12 10 12

Injector size

G31

Burner pressure (1) mbar - 28,60 28,80 29,20 28,80 28,10 28,50 28,40 27,70 26,40 25,30

Prop. Gas

Inlet pressure mbar

(1) : with open service door

Model1220303545506075100120145

mm 1,50 2,10 2,10 2,20 2,20 2,40 2,70 2,70 2,90 3,40 3,40

marking 150 210 210 220 220 240 270 270 290 340 340

20

mm - 1,20 1,20 1,20 1,20 1,45 1,50 1,50 1,60 1,95 1,90

marking - 120 120 120 120 145 150 150 160 195 190

30

5/25

2.2 Dimensions

D

Flue Inlet

Q

P

N

W

Gas Connection

S

R

150

E

D

J

250 min

Flue Outlet

30

C

I

K

L

2

M

1

A

F

500 min

V

19

T

GH

150

3

U

B

51

150

LCSA-4 A B C D E F G H I J K L M N P Q R S T U V W

12 965 567 652 80 71 531 130 305 100 782 334 280 87 106 345 444 122 221 123 611 406 1/2"G
20 965 567 652 100 71 531 130 305 103 785 334 280 87 106 345 444 122 221 123 611 406 1/2"G

30 965 567 652 100 74 531 94 370 139 821 334 280 87 106 345 444 122 221 123 611 406 1/2"G
35 965 845 652 130 74 531 154 517 138 824 331 420 82 175 508 720 134 211 123 611 406 3/4"G

45 965 845 652 130 74 531 117 605 138 824 331 420 82 175 508 720 134 211 123 611 406 3/4"G
50 1298 845 652 130 151 759 154 517 156 838 409 425 82 175 508 720 135 212 123 942 406 3/4"G

60 1298 845 652 130 151 759 154 517 139 824 409 425 82 175 508 720 135 212 123 942 406 3/4"G
75 1298 845 652 130 151 759 117 605 139 824 409 425 82 175 508 720 135 212 123 942 406 3/4"G

100 1298 954 807 130 151 759 73 808 301 1022 479 477 82 180 608 833 212 212 123 942 550 3/4"G
120 1750 980 846 130 67 1100 164 602 177 1057 348 490 90 175 595 795 160 256 20 1365 770 3/4"G

145 1750 1150 846 130 67 1100 173 692 177 1057 348 570 90 177 736 936 160 256 20 1365 770 3/4"G

1 Electrical connections
2 Service panel
3 Suspension points (M10 female)

6/25

GENERAL REQUIREMENTS

3

3.1 Related documents

It is important that all gas appliances are installed in
accordance with the rules in force and by
appropriately qualified persons. Failure to install
appliances correctly could lead to prosecution. It is
in your own interest and that of safety to ensure
compliance with the law.

3.2 Heater location

The location chosen for the air heater must permit
the provision of a satisfactory flue system venting to
outdoor atmosphere and adequately ventilated to
provide for combustion air. The location must also
provide sufficient space to allow the heater to be
serviced.

Table 3
Minimum installation clearances (mm)

LCSA-4 mm

Top 150

Flue connector 150

Access panel 800

Non access side 150

Bottom 150

Rear* 450

* Measure rear clearance from the back of the motor

Table 4
Recommended mounting heights to underside (m)(*)

LCSA-4 12 20

Mounting
height

* Height from floor to bottom surface of heater. These are
recommendations only. Positioning of heaters depends on
application.

Air heaters should, where ever possible always be
installed to blow toward or along external wall
surfaces. Where two or more air heaters are
installed in the same room, a general scheme to
ensure continuous air circulation should be
maintained for best results.
Suspended heaters are most effective when located
as close to the occupancy zone as possible, this fact
should be born in mind when determining the
mounting heights to be used. Care should be
exercised to avoid directing warm air directly onto
the occupants. Partitions, columns, counters,
storage racking, etc. should be taken into account
when choosing the location so that an unobstructed
path for the air circulation can be maintained.

Where air heaters are located in the centre of the
space to be heated, the air should be discharged
toward outside walls. In large areas, they should be
located to discharge air along outside walls with
additional heaters provided to blow air into the
centre of the area.

In places where infiltration of cold is excessive, such
as entrance doors it is desirable to locate a heater
so that warm air is discharged directly toward the
source of cold air from a distance of 4,5 - 6,0m

2,53456

30→-50 60-→100 120→145

Air heaters should not be installed in
corrosive atmospheres, i.e. near plating
or degreasing plants or in areas where
there is a fire risk.

Do not locate the air heater where it may
be exposed to water spray, rain, etc.

3.3 Combustion air supply & flue
system

The air heater may be installed as a balanced flue
(Type C) heater requiring both a combustion air inlet
duct and a flue pipe or as a power vented (Type B)
heater, which requires only a flue pipe exhausting to
outdoors. All products of combustion must be flued
to outdoor atmosphere.

Figure 2a : Combustion air and flue pipe sockets

1

2

3

4

Legend :

1 Flue outlet socket

2 Combustion air inlet opening
3 Gas connection inlet with sealing ring

4 Electrical connections

Each heater installed as a type B appliance must be
fitted with an individual flue pipe and the combustion
air inlet opening must be provided with a protection
grill (ask your distributor for the appropriate
protection grill (IP20) (dia130 = PN 02 25094 ).
Each heater installed as a type C appliance must be
fitted with an individual combustion air/flue pipe
system. Only systems specified by the air heater
manufacturer may be used.

Common flue and combustion air systems must
not be used

IMPORTANT: The flue must be installed in
accordance with national and local regulations.
Failure to provide proper flueing could result in
death, serious injury and/or property damage.
The air heater must be installed with a flue to the
outside of the building. Safe operation of any
power vented gas apparatus requires a properly
operating flue system, correct provision for
combustion air, and regular maintenance and
inspection.

7/25

3.3.1 Flues for power vented installations
(Type B appliances)

If the air heater is to be installed as a type B
appliance, air for combustion will be taken from
within the space where the heater is installed.
Ensure that an adequate air supply for combustion
and ventilation is provided within the building in
accordance with the regulations & rules in force.

Table 5 shows flue pipe sizes and maximum pipe
lengths. The minimum flue length is 0.5 metres.

Table 5 Flue pipe diameters & maximum lengths

LCSA-4

Heater socket &
pipe dia
Maximum straight

length

Equivalent length m
of 45° elbow
Equivalent length

of 90° elbow

mm

m

m

20, 30

12 35->145

100 130

80

9

0.75

1.5

Single wall flue pipes are required. All joints must
be sealed to prevent products of combustion from
leaking into the building. An approved flue terminal
is required.

If the flue passes through a combustible element of
the building it must be enclosed by a sleeve of non­combustible material and separated from the sleeve
by at least a 25 mm air break. The temperature of
any combustible material near to the flue must not
exceed 65°C when the heater is in operation. The
flue must be at least 50 mm away from any
combustible material.

Single wall flue pipe exposed to cold air or run
through unheated areas must be insulated. Where
condensation is unavoidable, provision must be
made for the condensation to flow freely to a point
to which it can be released, i.e. a drain or gully. The
condensation drain from the flue must be
constructed from non-corrodible material not less
than 20 mm diameter. Copper or copper based
alloys must not be used for condensation drains.

3.3.2 Combustion air inlet pipe & flue pipe for
balanced flue installation (Type C appliances)

Balanced flue air heaters are designed to be fitted
with a combustion air inlet pipe that obtains outdoor
air and a flue pipe that exhausts flue products to
outdoors.

Air heaters if fitted with a power venter permitting
either a vertical or horizontal combustion air
inlet/flue pipe system. The heaters must be

installed with a concentric vertical or horizontal
flue/combustion air inlet. The heaters are only
approved for use when installed with the
appropriate approved concentric vent terminal.

See table 6.

Both the flue and combustion air pipes must be sealed.
Use gasket sealed seamless aluminium pipe or
equivalent.

The flue pipe must include a re-sealable test port to
allow good average sampling of the flue gas mixture
for testing, the port must be at least 450 mm away
from the air heater flue connection socket.

Follow any flue pipe manufacturers’ installation
instructions for making joints, including connections to
the air heater, for passing through a building element
and for support requirements. If more than one air
heater is being installed in the same place each heater
must have a separate flue system.
Where condensation is unavoidable, provision must
be made for the condensation to flow freely to a
point to which it can be released, i.e. a drain or
gully. The condensation drain from the flue must be
constructed from non-corrodible material not less
than 20 mm diameter. Copper or copper based
alloys must not be used for condensation drains.

Figure 2b :
Combustion air and flue pipe sockets, Type C

Legend :

1 Flue products flue outlet socket for flue pipe
2 Combustion air inlet opening

Table 6
Combustion air inlet & flue pipe requirements

LCSA-4 12 35 -> 145

Heater socket
& pipe dia

Max. straight
length

Equivalent length
of 45° elbow

Equivalent length
of 90° elbow

Concentric vertical vent or wall terminal : Mugro/Burfix dia 130
Concentric horizontal vent or roof terminal : Mugro/Burfix dia 130

Flue pipe 80 130

mm

Inlet pipe 80 130

Flue pipe

m

Inlet pipe

Flue pipe

m

Inlet pipe

Flue pipe

m

Inlet pipe

20, 30

100

100

9

9

0,75

0,75

1,5

1,5

8/25

3.4 Air supply

It is important to ensure that there is an adequate
air supply at all times for both combustion and
heating requirements. Modern constructions involve
the greater use of insulation, improved vapour
barriers, and weather proofing. This practice means
that buildings are sealed much tighter than in the
past.
The combustion air supply for a power vented gas
fired air heater (Type B installation) can be affected
by lack of air supply. Natural infiltration may not be
adequate. Use of extract fans aggravates this
situation. It is important to ensure that there is an
adequate air supply at all times. Reliance on doors
and windows is not allowed. Always ensure that an
adequate inlet for fresh air for combustion is
provided sized to suit the total installation of any
combustion apparatus.

Fit an access guard to the combustion air inlet on
the back of the heater and take appropriate action to
ensure that it remains unblocked. See figure 2c.

WARNING: This model air heater is

installed as a type B application and is
designed to take air for combustion from
the space in which it is installed. Do not
restrict the combustion air intake.

Figure 2c :
Combustion air and flue pipe sockets, Type B

Legend :

1 combustion products flue outlet socket
2 combustion air inlet opening
3 Protection grill (option) (PN 02 25094)

3.5 Air distribution

Follow recommended practice for building air
distribution.
The following notes are of particular importance:

"Where free blowing air heaters are installed it must be

taken into account that heated air is buoyant when it
leaves the appliance, therefore, air patterns within the
space being heated will modify the air throw pattern
achieved.

In building having low heat loss where single heaters

are required to cover a large floor area and in buildings
with high ceiling heights, air re-circulation fans e.g.
Maximizors may be fitted to ensure even heat
distribution and minimize stratification. Care should be
taken to avoid impeding air flow with storage racking,
partitions, etc."

3.6 Electrical supply

Wiring external to the air heater must be carried out
in accordance with the rules if force and by
appropriately qualified persons.

A constant 230 Volt 50 Hertz single phase fused
electricity supply with neutral link is required. All
heaters and controls must be earthed. A lockable
isolator with contact separation of at least 3.0 mm
on all poles should be installed adjacent to the
appliance and within reach of any person working on
the heater.
When a number of heaters are to be connected as
part of a single installation each heater must be
provided with a separate isolator.

The electrical connection to the air heater is at the
back of the appliance. The final connection must be
made in the terminals provided in the control
compartment. Follow the wiring diagram provided
with the air heater.
Electrical supply cable conductor size should be 1.5
mm. Fit the cord grip supplied with the heater. The
length of conductors between the cord grip and the
terminals must be such that in the event that the
cable becomes taut the line conductors do so before
the earth conductor.

3.7 Gas supply

LCSA-4 air heaters are designed to operate on
either natural gas (G20) or propane gas (G31).
Refer to the specifications in section 2 of this
document and to the data plate for details of supply
pressures.

The gas meter and gas service must be checked by
the supply undertaking to ensure that they are
adequate to deal with the total load of all gas fired
apparatus installed.

9/25

INSTALLATION

4

4.1 Unpacking and preparation

Prior to dispatch, the air heater was operated and
tested at the factory. If the heater has incurred any
damage in shipment, file a report claim within 2
working days from receipt.
Check the shipping label and data plate to ensure
the specification of gas and electrical supplies are
compatible. Read this document and become
familiar with the installation requirements and the
appliance before commencing installation.

4.2 Suspending the air heater

Before installing the appliance, check to ensure that
the supporting structure is adequate to carry the
weight of the appliance and its ancillaries i.e. flue
system.

Table 7 Approximate Net weights (kg)

LCSA-4

Weight 59 64 94 99 114 126 184 242 279

When the heater is lifted for suspension, support the
bottom of the heater with plywood or other
appropriately placed material. If the bottom is not
supported, damage could occur.

The heater is supplied with four point suspension.
All points must be used. Two threaded nut retainers
are provided on each side of the top of the heater.
See dimensions in section 2.2 and figure 3.

Figure 3 Suspension detail

Be sure that the threaded hanger rods are locked to the
heater as illustrated. Recommended maximum hanger
rod length is 1.8m.

12

30 35 45

20

Add a nut to lock the

M10x1.5 hanger rod to

the heater

50

75 100 120 145

60

IMPORTANT:
Suspend the heater from the threaded nut retainers. Do
not suspend from the heater cabinet panels.
Do not place or add additional weight to the suspended
air heater. See hazard levels, page 2.
The heater must be installed in a level plane to ensure
proper operation.

4.3 Fitting the Combustion air inlet/Flue
system

Flue pipe runs may be horizontal or vertical and
terminate either through the wall or roof. See table 5
for maximum pipe length for an appliance installed
as type B or table 6 for maximum lengths and
approved supplied concentric terminals for a heater
installed as a type C appliance.
All pipe runs must be independently supported so
that the heater does not carry any of the weight of
the flue system.

4.3.1 Fitting the flue pipe

The flue pipe socket is located on the back of the air
heater.
Flue pipes must be sealed. Use seamless,
aluminium pipe or equivalent. Follow pipe
manufacturer's instructions (see figures 4 & 5).

Table 8 Flue pipe socket size (dia mm)

LCSA-4

Socket

12 20,30 35 -> 145

80 100 130

4.3.2 Installing a guard on the combustion air
inlet pipe for power vent (Type B installations)

The combustion air inlet socket is located at the
back of the heater. When installed as a type B
appliance, protect the inlet by fitting an access
guard on the socket. Do not block this socket as it

supplies combustion air for the burner (see
figure 4).

4.3.3 Fitting the combustion air inlet pipe for
balanced flue (Type C installations)

The combustion air pipe attaches directly to the inlet
socket at the back of the heater. Air inlet pipes must
be sealed. Use seamless aluminium or equivalent.
Follow the pipe manufacturer's installation
instructions. See typical installations in figure 5.

Table 9 Air inlet socket size (dia mm)

LCSA-4

Socket

12 20,30 35 -> 145

80 100 130

10/25

Figure 4

4.4 Gas connection

Connection to a gas network may only be carried out
by appropriately qualified persons. The gas
installation must comply with the rules in force using
materials appropriate for gas installation.

To facilitate servicing, the air heater must be fitted
with an approved gas service tap and union fitting or
union tap adjacent to the appliance.
The inlet gas supply line must be installed so as to
permit the access door to be opened and to allow
removal of the slide out burner assembly.
Air heaters suspended by flexible suspension
materials or drop rods must be connected to the gas
supply using an approved flexible connector.
Sufficient slack must be provided in the connection
to allow for movement of the appliance. Use a
flexible connector of suitable size to reduce the
pressure drop and the possibility of gas flow noise.

Do not use the appliance gas supply to
balance or support any part of the
appliance

Figure 6

Legend :

1 Gas tube inlet sealing ring
2 Inlet gas pipe
3 Union fitting
4 Gas service tap
5 Gas pipe

.

Figure 5

4.5 Electrical connections

The electrical installation may only be carried out by
appropriately qualified persons observing the rules
in force.

All electrical connections should be made in the
heater control compartment (refer to figure 9).
Screw type terminals are provided. Connections
should be in accordance with the terminal markings
and the wiring diagram affixed to the air heater or
included with this document.

danger

ATTENTION : Failure in electrical wiring can
bring real damage to components of this
appliance. Please follow very carefully the
wiring diagram supplied with this air heater.

The minimum external controls required for the air
heater are a room thermostat. It is essential the

main input line and neutral to terminals L and N
remains live at all times even when the appliance
is switched off this is to ensure correct
operation of the unit.

An indicator light and burner reset button are fitted
inside the appliance. To add a remote reset button,
make connections to the terminals in the electric
box as indicated on the wiring diagram.

IMPORTANT:
If the reset button requires activating for any reason the
cause should be identified before resetting. After
resetting stay with the appliance for long enough to
ensure that lock-out does not reoccur (suggest 5
minutes).
Fix all electric cables and installer’s wiring to the control
panel and ensure they do not touch the combustion
collector box.

THIS APPLIANCE MUST BE EARTHED!

11/25

4.6 Room thermostat location

Do not attempt to control more than 1 air heater
from a room thermostat or control panel unless a
properly wired relay is fitted. Follow instructions
supplied with such panels.

The location of the room thermostat is important. It
should not be fitted on an outside wall. Avoid
location in draughty areas or where it may be
influenced by heat

AIR DISTRIBUTION

5

sources e.g. the sun, process plant, etc. The
thermostat or temperature sensor should be
mounted on a vibration free surface and mounted
about 1,5 meters above floor level. Follow the
thermostat manufacturers fitting instructions. The
thermostat must be suitable for switching 230 volts.

LCSA-4 air heaters are fitted with adjustable
horizontal louvers over the range 0 - 45 degrees
from the horizontal so as to be able to direct the
airflow downwards.

COMMISIONING & TESTING

6

The commissioning and testing may only be carried
out by appropriately qualified persons.
This section should be read and fully understood
before commencing commissioning and testing.

6.1 Electrical check

After completion of the installation and before
switching on the electrical supply to the appliance, a
preliminary check must be carried out by a qualified
electrician. The following must be checked:

* Ensure that all cables & installer’s wiring are

fixed to the gas pipe & that they do not touch
the combustion collector box

* Check that all wiring is connected in

accordance with the appliance circuit diagram;

* Ascertain that the correct fuse value and cable

size has been provided;

* Check to ensure that the appliance is earthed

by conducting an earth continuity test. Connect
a test meter, one lead to the appliance earth
terminal and the other to the mains incoming
earth point at the electrical isolator. A
resistance reading of 1,0 ohm or less must be
indicated. If a higher reading is obtained, check
all cable connections to ensure adequate
security and cleanliness. If problem still exists ,
it may be necessary to consult the electricity
supply undertaking;

* Carry out a polarity test. Connect one lead of a

suitable AC voltmeter to earth and connect the

DO NOT ADJUST THE LOUVRES BEYOND THEIR

STOPS.

other lead to the live supply terminal (L) at the

air heater. Switch ON the power to the air
heater and check for correct voltage.

The same result should be obtained by

connecting the test leads between live and
neutral.

Connect the voltmeter test leads to N and E. A

reading of  0V should be obtained. If these
tests do not conform to the above, there is a
fault which must be rectified before proceeding
further with the commissioning;

* Check that a suitable thermostat or control

panel has been fitted;

* Ensure that an electrical isolator with two pole

separation with a minimum air break between
poles of 3,0 mm has been fitted adjacent to the
air heater.

6.2 Gas connection

Only persons formally qualified to work on gas
fired apparatus may carry out commissioning
and testing.

The whole of the gas service installation including
the
meter must be inspected, tested for soundness and
purged in accordance with appropriate requirements
by a qualified person.

Never use a flame for checking gas
soundness.

12/25

6.3 Suspension and support

Check to ensure that the air heater is adequately
suspended or supported and that no other parts have
been fitted that are not independently supported and
secured. For safe and correct operation, check the
heater is level in both planes.

6.4 Lighting the air heater

LCSA-4 air heaters are all fitted with automatic spark
ignition systems. When adequate airflow for
combustion is proven by an air proving control and a
pre-purge period has elapsed, the integral ignitor and
multi-functional gas control operate. The ignition
spark ignites the gas creating the burner flame which
is detected by a flame rod sensor. If a burner flame is
not detected, the ignition controller proceeds to lock­out and requires manually resetting. Lock-out is
indicated by the red warning light on the air heater.

Note : If the first reset is not successful, wait 15
seconds before attempting reset.

6.4.1 To turn the air heater "ON"

The following checks should be carried out before
attempting to light the air heater.

* Ensure that the gas supply to the air heater is

turned ON;

* Ensure that the electrical supply to the air heater

is switched ON;

* If fitted ensure that a time switch is set to an ON

period

* Set room thermostat to call for heat. e.g. to above

room ambient temperature. The burner will now
light.

The burners can be seen through the viewing port.

* Adjust the room thermostat to the required

operating comfort temperature. The air heater will
now start automatically when heat is called for by
the room thermostat.

Note : If the air heater will not start on initial start-up,
the ignition controller may be in lock-out position and
require resetting. This may occur especially if the
appliance has been on stand-by for a prolonged
period.

6.4.2 To turn the air heater "OFF" for short
periods

Adjust the room thermostat to its lowest setting or
'OFF'. The fan will continue to run to cool the heater
and then switch OFF automatically.

6.4.3 To turn the air heater "OFF" for long
periods

Adjust the room thermostat to OFF or its lowest
setting. When the fan has stopped, turn OFF the gas
supply and then switch OFF the electricity supply to
the air heater.

6.5 Air heater gas pipe work

The soundness of the air heater pipe work has been
checked prior to leaving the factory. However during
installation, connections may have been loosened.
Check the soundness of the appliance pipe work
using a soapy solution. If any leaks are found they
must be rectified immediately.

Never use a flame for checking gas
soundness.

6.6 Adjustments

6.6.1 Burner gas pressure adjustment

The gas pressure is set for the required heat input
before the appliance leaves the factory. Provided
the gas supply to the air heater is in accordance
with the supply pressure described on the appliance
data plate the operating pressure will not require
adjustment. To check the pressure, the following
procedure should be carried out:

* Ascertain from section 1 of this document and

the appliance data plate the correct operating
gas pressure for the air heater;

* Turn the room thermostat control to its lowest

setting;

* Remove the screw from the burner pressure test

point of the multi-functional control valve.
Connect a manometer to the test point( see
figure 7);

* Adjust the room thermostat to call for heat e.g.

above room ambient temperature;

* Observe the burner gas pressure on the

manometer and compare to the required
pressure;

* If necessary, adjust the burner gas pressure

(only for natural gas). Remove the cover screw.
Turn the regulator screw anti-clockwise to
decrease pressure or clockwise to increase
pressure (see figure 7);

* Set room thermostat to lowest setting to turn the

burners OFF. Replace the test point screw (if
removed) and with the main burner alight, test
for gas soundness using a soapy solution.

Reset temperature control/room thermostat to

comfort operating level.

13/25

Figure 7 : Honeywell gas valve

Legend :

1 Gas valve HONEYWELL VR4601AB
2 Inlet pressure gas test point
3 Burner pressure gas test point
4 Burner pressure regulator cover
5 Burner pressure regulator
6 Electrical connection 230V

6.7 Air distribution system

Adjust the air outlet discharge louvres to provide a
satisfactory spread of the warm air. Direct the air
towards the floor avoiding blowing directly on people
who may be in the vicinity of the appliance.

If louvre adjustment is carried out whilst
the appliance is hot wear gloves to avoid
being burnt.

6.8 Air heater controls and operation

Check air heater operation after all adjustments have
been carried out. Set the temperature control above
ambient temperature.

LCSA-4 air heaters are fitted with a pressure
sensitive, combustion air safety control that monitors
the combustion airflow.
The control operates with the settings given in table
10 (settings are for sea level installations)

When the combustion air safety control closes,
verifying airflow, the gas control valve will open and
the burner will light. When insufficient airflow, the
burner will extinguish until the airflow returns to the
acceptable level.

Wait approximately 30 seconds after the burner has
lit, the time delay relay will activate the thermal fan
control which will energize the fan motor. Continue to
operate the air heater for several minutes to ensure
correct operation.

Turn room thermostat to its lowest setting. The main
burners should extinguish while the fan continues to
run to cool the air heater. The fan delay relay will
normally be de-energized and stop the fan motor in
approximately 45 seconds.

Table 10 Combustion air pressure control settings

Normal

LCSA-4

12
20 >163 135
30
35 >200 155

45/50 >183 155

60 >240 175

75 >290 185
100 >250 210
120 >250 238
145 >250 238

at 2x1m pipe with terminal

equilibrium

warm (Pascal)

>131

>170 130

Set point 'off'

(Pascal)

119

6.9 Handing over

Upon satisfactory completion of commissioning and
testing, hand the instructions to the user or their
representative.

Advise the appropriate person how to safely use and
operate the air heater and describe the use of
appropriate external controls. Ensure that the
person understands how to start the heater and how
to turn it OFF.
Suggest that the instructions are placed close to the
air heater for future reference. In the absence of an
appropriate location fix them to the gas service
meter. Ensure they are not placed where they may
restrict the airflow from the heater or where they
may catch fire from a hot surface.

Advise the person who is resuming responsibility
that for continued safe operation the air heater
should be serviced at least once a year.

14/25

SERVICING INSTRUCTIONS

7

IMPORTANT:
Only appropriately qualified persons may carry out
servicing and fault finding on this gas fired equipment.
Before commencing service ensure that both the gas and
the electricity are turned and switched "OFF" and that the
air heater has cooled down. Inadvertent substitution or
replacement of components similar to those specified or
replacement in a manner contrary to the method herein
described could constitute a hazard and lead to
prosecution.

When cleaning air heaters, wearing of eye
protection and a dust face mask is
recommended.

LCSA-4 air heaters will operate with a minimum of
maintenance. To ensure long life and satisfactory
and safe performance, an air heater that is operated
under normal conditions should be inspected and
cleaned at the start of each heating season. If the
air heater is operated in an area where unusual
amounts of dust, etc are present in the air, more
frequent servicing is recommended.

When any service is completed, be sure that
components are reassembled correctly to ensure
that no unsafe condition exists.
Upon completion of the service carry out the
commissioning instructions outlined in section 6 of
this document.

WARNING: Excessive dirt build-up on the
inside of the burner ports could cause
unburnt gas to spill out of the back of the
burner tube causing a fire or explosion.
To prevent this occurring, clean all of the
burner ports at least annually.

Service procedure

The following procedures should be carried out at
least annually:

1. Remove the burner assembly as in section 8.1.
Clean thoroughly, (cleaning the burners requires
an emery cloth, wire brush and a cleaning cloth ­stubborn deposits on burners are best cleaned
using "acetone" as a solvent).

* Check the condition of the ignitor and clean to

remove all deposits. Check the spark gap (3,0

mm).
* Check the sensor - clean as necessary.
* Remove any soot deposits from the burner with

a wire brush. Clean the ports with a degreaser

or acetone. A vacuum cleaner or compressed

air may assist in this cleaning operation. Wipe

the

inside of the burner tube clean (cleaning
thoroughly with a degreaser as recommended
will retard future build-up of dirt). Inspect the
burner for any damage or deterioration. If the
burner is damaged or corroded, replace it.

2. The heat exchanger should remain clean unless
a problem has developed due to poor
combustion. Examine the heat exchanger tubes
internally and externally for any sign of
deterioration. The outside of the tubular heat
exchanger can be cleaned from the front of the
heater with an air jet and/or a flexible brush.
Remove any dust and grease deposits.

The inner surfaces of the heat exchanger can be

reached for cleaning with the burner and
combustion air fan (venter) assemblies removed.
Clean with a flue brush or a heavy wire to which
wire wool has been attached.

Brush inside each heat exchanger tube until all

foreign material has been removed. The use of a
flashlight is necessary to carry out this
operation.

3. Clean the axial fan blades, fan guard, and fan
motor to remove all external dirt . Check the
security of the fan on the motor.

Note: Fan motors are lubricated for life
and do not require lubricating.

4. Remove any dirt and/or grease that may have

accumulated on the venter fan motor and its
housing. NOTE: The combustion air fan motors
are lubricated for life and do not require oiling or
greasing.

5. The gas multi-functional control valve requires

no field maintenance except cleaning of its
exterior and checking the condition of the wire
connections. Instructions for testing pressure are
given in section 6.6.

6. Check the flue/combustion air system for

soundness. Reseal/replace any parts that are
not sound.

7. Check all wiring connections. Check wiring for

any signs of damage. Replace any suspect
wiring with an equivalent specification.

8. Check operation of thermal fan control and
control relay.

9. When service is complete carry out full

commissioning procedure as per section 6 of this
document

.

15/25

Removal & replacement of parts

8

LCSA-4 air heaters must only be fitted with
authorized replacement parts. These heaters must
use certificated spare parts to comply with
legislation.

8.1 Main burner removal

Instructions for burner removal (see figure 8):

1. Turn OFF the gas supply to the air heater.

2. Switch OFF the electricity supply to the air
heater.

3. Open the access door.

4. Disconnect the union in the gas supply outside of
the appliance.

5. Remove gas supply pipe from multi-functional
gas control valve.

6. At the burner rack assembly, remove the nuts
that secure the burner manifold to the burner
rack. Lift the burner rack/manifold assembly
upward and pull the assembly out of the air
heater.

Instructions for re-assembly:

1. Reverse the procedure for removal making sure
that all parts are installed correctly. Check that
all components are secure.

2 When lighting, always follow the lighting

instructions on the air heater.

Figure 9 View of the Control Compartment

1

12

Remember!

After any service work has been carried out, the air
heater must be fully commissioned. See section 6
of this document

Figure 8 (for clarity, the heater cabinet & other parts

are not illustrated)

9

8

11

13

1 Burner
2 LC3 limit controls
3 Burner operating lamp H6

10

2

4 Reset switch S3
5 Spark igniter ER
6 Control panel
7 Gas valve V1
8 Fan motor M1
9 Venter motor M3
10 Fan control relay KFC
11 LC1 limit control
12 Flame sensor IS

7

13 Reset LC3
14 Fuse F3.1

3

4

5

6

14

16/25

8.2 Burner injectors

1. Carry out steps 1 to 6 of section 8.1.

2. Unscrew the main burner injectors.

3. Re-fit new injectors.

4. Re-assemble in reverse order.

8.3 Ignition system

To access the ignition system, follow steps 1 to 3 in
section 8.1.

Ignitor- refer to figure 9 and locate the ignitor (on

the side of the burner rack). Disconnect the wire,
remove the screw and the ignitor. Clean with an
emery cloth.
Note: Spark gap must be maintained to 3.0 mm (see
figure 10a)
Re-fit the ignitor as per figure 10b.

Due to high voltage on the spark wire and
electrode, do not touch when energized.
See hazard levels.

Flame sensor -

flame sensor. Disconnect the wire, remove the
screw and the flame sensor. Clean with an emery
cloth.

Ignition controller -

circuit monitors the operation of the burner including
ignition. Do not attempt to dismantle the ignition
controller. Each heating season ignition cables
should be checked for insulation deterioration and
good connections.

Proper operation of the direct spark ignition
system requires a minimum flame current of 1,0
μA when measured with a micro-ammeter.

Fig. 10a - Ignitor assembly

Fig. 10b : Fitting the ignitor

For further information and checkout procedure of
the direct spark ignition system, refer to the
manufacturers control operating instructions a copy
of which is supplied with the air heater.

Refer to figure 9 and locate the

The enclosed integrated

8.4 Multi-functional gas control valve

1. Ensure gas supply to the air heater is turned
OFF.

2. After the air circulation fan has stopped, switch

OFF the electricity supply to the air heater.

3. Mark for future identification and disconnect the

wires connected to the valve.

4. Disconnect the gas service union between the

control valve and the gas service tap. Remove
the gas control valve.

5. Re-fit a replacement valve making all of the

required connections.
6 Carry out complete commissioning procedure

prior to placing the appliance back into service
as outlined in section 6.0

The gas control operating valve is the
prime safety shut-off.
All gas supply lines must be free of dirt,

scale, etc. before connecting to the air
heater thus ensuring positive closure of
the control valve.

8.5 Thermal overheat (limit) controls

If it is determined that the thermal overheat control
needs replacing, use only authorized replacements
that are designed for this appliance.
To gain access to the control, open the controls
compartment access door. Refer to figure 9 for
control locations. The control near the top of the air
heater is a disc type control. Both controls are
capillary types with a capillary tube that extends into
the heat exchanger area. To remove the controls,
disconnect the wires leading to them, remove the
fixing screws and lift clear of the inner casing panel.

Note: The capillary control is fitted to a bracket.
With the bracket removed from the air heater,
remove the control from the bracket.

When replacing a capillary control be careful not to
damage the capillary tube by kinking. Make bends
with a generous radius (approx 25 mm).

8.6 Combustion air control/switch

If it is determined that the air differential pressure
switch needs replacing, use only authorized
replacements that are designed for the air heater
being serviced. These switches are calibrated to
operate at the designed combustion air flow duty for
each appliance size in the product range.

8.7 Combustion air fan (venter)

1. Ensure gas supply to the air heater is turned

OFF

2. After the air circulation fan has stopped, switch

OFF the electricity supply to the air heater.

3. To gain access to the fan open the hinged

controls compartment access door. refer to
figure 9 for location

4. Mark for future identification and disconnect the

wires connecting the fan motor at the terminals
on the main wiring junction.

5. Remove combustion air fan and clean as

necessary using a wire brush and solvent to
remove sticky residues.

6. Re-assemble and check for free rotation before

proceeding to test the appliance.

Note : the combustion air fan motor is lubricated for
life. DO NOT OIL or GREASE.

17/25

9

FAULT FINDING

Fault finding may only be carried out by appropriately qualified persons

9.1 Main fault finding chart - Lock-out indicator light is "OFF", but air heater will not

operate

Is the thermostat above

room temperature and if

Is t here conti nui ty between

terminal s 9 &10

no yes

yes

used is the time

clock"ON"

yes

Is power venti ng operat ing?

no

Reset limit control

no

Set thermostat above room

temperat ure & if used make

certain the time clock is ON

Check electronic

igniti on control

Is there a restriction i n the

flue pipe or inlet grill

yes no yes

Correct fault

Is the pressure tubing
connected & in sound

condition?

no yes

Is t he wheel di rty

yes

Does the power venter

operate?

no

Is there 230V between

L&N?

Is there 230V between

1 & N ?

yes

Is there 230V between

11 & 12 ?

no

Is there conti nuity between

no

9 & 10 ?

yes

yes

no

no

yes

Determine what caused the

limit to trip

Place i nto normal operat ion

Check the mains

Check the ti me/tempeature

control

Check venter motor

Replace pressure swit ch

Clean the venter wheel

Connect or repl ace tubi ng

Check pressure switch

18/25

9.2 Ignition Controller Lockout indicator Light Repeatedly Comes "ON"

Is polarity of mains

correct?

no

Correct polarity

yes

Does the inlet gas

correct the gas supply

pressure

Check spark gap and

ceramic & check

spark wire &

connector

no yes

pressure agree with the

data badge

no no

Is a spark visible ?

Wait 15" and press

reset button

During 5" trial for ignition is

a flame visible in ths view

port?

check

electronic

ignition

control

check multi

functional
gas valve

During 5" trial for ignition

no

is a spark visible?

Spark visible, still no

yes

Is there 220 to 240V

between terminals

Check electronic

yes

flame

13 & N

no

ignition control

yes

Check flame signal using

micro amp meter. Is signal

greater than 1,0 micro

Amps?

no

Remove corrosion
& scale from flame

sensing rod & clean

ceramic insulation

Check flame signal. Is it

greater than 1,0 micro

Amps?

Check electronic

yes

ignition control

yes

Place in normal

operation

19/25

9.3 Limit Control Fault Finding Chart (limit control trips)

Note LCSA-4 air heaters are equipped with 2 limits (a recycling limit and a manual reset limit). During normal operation, neither limit should

trip even if the main electric supply is interrupted during operation. In the event of motor failure, the recycling limit will trip opening the gas
valve.

Adjust thermostat

temp. setting above

ambient to energize fan

& gas solenoid valve

Does the fan

motor operate?

yes no

no

Replace

the motor

yes

Is there 220-240V at

terminals N and 4?

yes

yes

Remove the

restricition

Check for excessive

main burner pressure

Has any non-factory authorized air distribution

device been placed on the heater? Is there excessive

static pressure in the ductwork? Did the motor overload

Does the fan control

energize the fan motor

in less than 75"?

yes

9.4 Fan Fault Finding Chart

Consult fan

fault finding

trip?

no

no

Consult fan
fault finding

yes

Does the limit trip

before the fan is

energized?

no

Place system in normal

operation

Adjust thermostat

temperature

setting above ambient to

energize the fan and the

fan solenoid valve

no

Replace the

fan start relay

Is there 220-240V

at terminals N & 4?

Replace fan

Does the fan

no yes

operate ?

yes

motor

20/25

Place the system

in normal operation

PARTS LISTING

10

LCSA-4 Part number

Delta P switch S3: 12 30 60617 238 238Pa out 250Pa in

Delta P switch S3: 20/30 30 60617 175 175Pa out 203Pa in

Delta P switch S3: 35/45 30 60621 155
Delta P switch S3: 50 30 60617 200 200Pa out 210Pa in

Delta P switch S3: 60 / 75 / 100 30 60617 175 175Pa out 203Pa in

Delta P switch S3: 120/145 30 60617 185 185Pa out 203Pa in

Overheat control device LC1 (not 120/145) 03 24959 04 90°C out 85° C in
Overheat control device LC3 (all, exc 100, 120 & 145) 03 24959 03 110° C out reset

Overheat control device LC3 (100) 03 24959 96° C out reset

Overheat control device LC3 (120/145) 03 24959 03 110° C out reset

Overheat control device LC3 (120/145) 03 24958 86° C out reset
Venter motor (all exc 120/145) 11 43426 04

Venter motor 120/145 20 25749

Gas valve one stage 35/45/60/75/100 03 25136

Gas valve one stage 12/20/30 03 25141
Gas valve one stage 120/145 03 25144

Burner relay E 03 25324

Ignition electrode ER 03 400US 42

Ignition electrode ER (120/145) 05 25186
Flame sensor electrode IS 03 401US 195292

ERP fan 12 01 27003

ERP fan 20 01 27006

ERP fan 30 01 27021
ERP fan 35/45 01 27010 01

ERP fan 50 01 27011 01

ERP fan 60/75 01 26063

ERP fan 100 01 27014 02
ERP fan 120/145 (2x) 01 26063

GAS CONVERSION

11

1627Pa out 1767Pa in

Settings

11.1 LCSA-4 air heaters are designed to
operate on natural, propane or butane
gas and will be supplied fitted for the gas
type ordered. In the event of site
conversion to a different gas type it is
necessary to convert the gas burner and
burner controls.

11.2 Affix new data plate and gas type over­sticker.

11.3 Upon completion of conversion re­commission the air heater in accordance
with section 6 of this document.

11.4 Changes to carry out:
Natural gas: use Honeywell VR4601AB
(PN 03 25136) - set pressure regulator as

per Table 2A
propane: use Honeywell VR4601B
(PN 03 25136B) or VR4601AB + blocking

plate

To adapt gas injectors and gas inlet pressures,
we refer to table 2A/2B.

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12

USER INSTRUCTIONS

Operating:

How the air heater works:
Gas is burned by an atmospheric burner which fires
into a heat exchanger. The gas burner is controlled
by a double gas valve via an electronic burner
control, which is actuated automatically via external
controls i.e. a room thermostat and/or a time switch.
The burner is ignited by a spark igniter. When the
burner fires and warms the heat exchanger, the heat
is sensed by a thermally actuated fan control which
switches on the fan when the air temperature has
reached its preset operating level.
At the end of a heating cycle the burner is switched
off, the air circulation fan will continue to run until
the air heater has cooled to a safe condition.
Thereafter the fan will remain off until the next cycle
is initiated.

Safety:

1. Flame failure is detected by the ionization probe
which is the sensor and will immediately result in

gas valve shut down.

2. Safety against overheating is assured by two
overheat controls. The first is an automatic
recycle control which protects against low air
flow i.e. clogged air ways, fan failure etc. The
second, which is set to a higher level than the
first one, is a control which locks out and
switches off the burner in the event of gross
overheating for any reason. Manual intervention
is necessary to reset this control device.
Resetting of the automatic burner control may
also be required.

3. The location of the air heater should be
maintained at normal atmospheric pressure.
Changes to the building after air heater
installation, should have regard to the heating
installation, i.e. structural changes causing
excessive draughts from doors, windows etc.
Other air handlers and installation of air
extraction equipment which may cause a
negative pressure environment, can seriously
affect the operation of this type of air heater,
especially if combustion air supply is not ducted.

To light the heater:

1. Turn on the gas supply to the air heater.

2. Switch on the electricity supply to the air heater.

3. Ensure time switch (if fitted) is set to an 'ON'
cycle.

4. Adjust control/room thermostat to desired
temperature.

5. Air heater will light automatically when the room
thermostat calls for heat after about 30 sec.

6. If the appliance does not light:

a) check that the burner control does not require

resetting. An indicator light glows at the inside
panel of the appliance and on a remote control if
fitted. Reset by pushing reset/button inside the
appliance or the remote control.

b) check if thermal overheat control requires

resetting

7 If the thermal overheat control requires resetting

and doing so restarts the air heater, wait until
the appliance warms to thermal equilibrium, to
ensure the overheat control does not lock out
again. If it does and the temperature near the
heater is less than 30°C, then switch off the
appliance and call for service. If the temperature
is over 30°C, take appropriate action to reduce
the ambient temperature near the air heater.

Air circulation:

1. The space heating process is for air to be
circulated through the appliance whereby it gains
heat from a heat exchanger. The air is directly
discharged into the space to be heated. The air
is eventually re-circulated. Therefore it is very
important that an unobstructed path for the
circulation of the air will be maintained. This is
particularly important if the air heater has been
installed to blow through the wall between two
rooms.

2. Sometimes the air circulation fan of the
appliance is connected to a remote over-ride
switch. This enables air to be used for circulation
purposes when the air heater is not used for
heating purposes e.g. in summer.

To use this feature:
a) switch ON electricity
b) switch ON manual override switch, this may

be fitted as a feature on a remote composite
control.

Maintenance:

1. Maintenance and service must only be carried
out by appropriately qualified persons e.g.
"Corgi" registered undertakings.

2. It is in your interest to ensure proper service and
maintenance is carried out at a regular basis.
Periods between services are dependent upon
the local environment where the heater is
installed. All gas appliances should be serviced
at least once a year.

3. In case of any damage to the appliance, it must
be shut down completely and checked by an
appropriately qualified person.

4. In the event of difficulties in resolving any of
these matters, please do not hesitate to contact
the manufacturer or their official distributor.

NEVER SWITCH OFF ELECTRICTY SUPPLY TO THE AIR
HEATER WITHOUT FIRST CLOSING THE GAS
ISOLATING TAP

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HEALTH & SAFETY STATEMENT

13

13.1 General

Under the Consumer Protection Act 1987 and
Section 6 of the Health and Safety at Work Act 1974
we hereby provide the following information on
substances hazardous to health.
Product range reference LCSA-4 air heaters.

13.2 Cautionary note

During first firing some smoking may occur, this is
due to the burning off of protective/lubricating oils
used during appliance production. Most of this will
have been removed during the production testing
process. It is a wise precaution to ensure that
adequate ventilation is provided during the initial
firing and throughout the commissioning period, this
is particularly important if the discharge air is to blow
into a confined space. This smoking does not
constitute a poison hazard.

13.3 Declaration

LCSA heaters contain no asbestos; copper is not
employed in gas carrying components; solder which
has a melting point below 450°C is not used; paints
for corrosion protection and decoration are heat
cured and contain no lead.
The above appliances meet the Electrical Safety
requirements of EN60 335 Pt 1 1988.

13.6 Thermostat.

Material: Illuminating Kerosene.
Description: Sealed phial contains a small quantity in
liquid form.
Recognition: Colorless liquid, paraffin oil/petroleum
hydrocarbon odor.
Characteristics: Non-corrosive, flammable with no
poisonous reference-CH poison Class 3
Precautions: Avoid handling. This product can irritate
and defat the skin. Prolonged contact may cause
dermatitis. Avoid breathing vapor. Avoid eye contact.
Do not ingest.
First Aid: Skin. Wash thoroughly with soap and water.
Eyes. Rinse immediately with copious amounts of
clean water.
Ingestion: Seek medical advice.

NOTE: If skin irritation persists seek medical advice.

13.7 Electrolytic Capacitor

Two types are used by random selection:
Recognition: 1. Plastic enclosure 2. Aluminium
enclosure
Material: Contained liquid electrolyte
Known hazards: Electric shock possible if charged.
Precautions: Discharge to ground/earth. Do not
incinerate.
First Aid: Treat for electric shock if affected.

13.4 Miscellaneous

Small quantities of adhesives and sealants used in
the product are dried and cured and present no
known hazard.

13.5 Insulation and Seals.

Material: Alumino - silicon fiber - crane glass
Description: Tapes
Known hazards: Some people can suffer reddening
and itching of the skin. Fiber entry into the eyes will
cause foreign body irritation. Inhalation will cause
irritation to the respiratory tract.
Precautions: Wear protective gloves when handling.
People with a history of skin complaints may be
susceptible to irritation.
Dust levels are only likely when the material is
abraded.
In general normal handling and use for this purpose
will not present discomfort. Follow good hygiene
practices, wash hands before consuming food or
using the toilet.
First Aid: Medical attention must be sought following
eye contact or prolonged reddening of the skin.

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CERTIFICATE

EC DECLARATION OF CONFORMITY OF MACHINERY

(Annex II 1 A of EC Machinery Directive 2006/42/EC)

Nortek Global HVAC Belgium nv

J&M Sabbestraat 130/A000
B-8930 Menen, Belgium

Hereby declares that the following gas-fired unit heaters:

LCSA-4
Types 12, 20, 30, 35, 45, 50, 60, 75, 100, 120, 145

Complies with the requirements of the above mentioned machinery directive
Complies with the requirements of further directives, namely

GAD 2009/142/EC - EMC 2004/108/EC – LVD 2006/95/EC
the following harmonized standards have been applied:

EN 1020: Non-domestic gas-fired forced convection air heaters for space heating not
exceeding a net heat input of 300 kW, incorporating a fan to assist transportation of
combustion air and/or combustion products.

The following notified body
Technigas
Chaussée de Vilvorde 156
BE 1120 Brussels
Has been involved with regarding to the
EC type examination number E1058/5521

Menen, 01.10.2016

J. Dubus
Engineering Team Leader

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NORTEK GLOBAL HVAC (UK) LTD

Park Farm Road

Folkestone

United Kingdom

Tel.

01303 259 250

www.reznor.eu

Registered in England N° 1390934. Registered office: 10 Norwich Street, London, EC4A 18D

Nortek Global HVAC is a registered trademark of the Nortek Global HVAC Limited. Because of continuous product innovation. Nortek Global HVAC
reserves the right to change product specification without due notice.

Kent

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