Reznor | UDSA 100-2 | Technical data | Reznor UDSA 100-2 Technical data

®
0803UDSA-2GBEN
UDSA 008-2 / 100-2
Gas fired Balanced flue / Fan assisted flue
unit heater
INSTALLATION
COMMISSIONING
SERVICING
These appliances meet the following EC Directives:
DIR CE 90/396/EEG:GAD
DIR CE 89/336/EEG:EMC
DIR 73/23/EEG:LVD
DIR 89/392/EEG:MD
WARNING
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.
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 an evil operation possibly resulting in damage to the apparatus and/or
environment in which the unit is installed.
Reznor U.K. Limited - Park Farm Road - Folkestone - Kent - England
Tel.: 01303-259141 · Fax 01303-850002
0803UDSA-2GBEN, Pag. 1/36
INDEX
Warnings ......................................................................................................................... 3
1. General...................................................................................................................... 4
2. Installation codes ...................................................................................................... 4
3. Warranty ................................................................................................................... 4
4. Uncrating and preparation ........................................................................................ 4
5. Dimensions ............................................................................................................... 5
6. Technical data ........................................................................................................... 7
7. Flueing requirements ................................................................................................ 8
8. Unit heater location .................................................................................................. 12
9. Hanging the unit ....................................................................................................... 13
10. Gas piping and pressures .......................................................................................... 15
11. Electrical supply and connections ............................................................................ 16
12. Check installation and start up.................................................................................. 18
13. Maintenance schedule ............................................................................................... 23
14. Heat exchanger maintenance .................................................................................... 24
15. Burner maintenance .................................................................................................. 25
16. Burner orifice ............................................................................................................ 27
17. Ignition system ......................................................................................................... 27
18. Fan motor .................................................................................................................. 28
19. Fan motor, fan blades and guard ............................................................................... 28
20. Venter motor and wheel ............................................................................................ 29
21. Gas valve .................................................................................................................. 31
22. Combustion air pressure switch ................................................................................ 32
23. Limit controls ........................................................................................................... 32
24. Flue and combustion air system ............................................................................... 33
25. Troubleshooting ........................................................................................................ 33
26. Parts list .................................................................................................................... 36
0803UDSA-2GBEN, Pag. 2/36
Warnings
FOR YOUR SAFETY
What to do if you smell gas:
•
Do not try to light any appliance.
•
Do not touch any electrical switch; do not use any phone in your
building.
•
Immediately call your gas supplier.
•
Evacuate all personnel.
FOR YOUR SAFETY
Do not store or use petrol or other flammable vapours and liquids in the
vicinity of this or any other appliance.
WARNING: Improper installation, adjustment, alteration, service, or
maintenance can cause property damage, injury, or death. Read the
installation, operation, and maintenance instructions thoroughly before
installing or servicing this equipment.
WARNING : Gas-fired appliances are not designed for use in hazourdous
atmospheres containing flammable vapors or combustible dust, in atmospheres
containing chlorinated or halogenated hydrocarbons or in applications with
airborne silicone substances.
WARNING : Should overheating occur, or the gas supply fail to shut off, shut
off the manual gas valve to the appliance before shutting off the electrical
supply.
WARNING : Do not use this appliance if any part has been immersed in water.
Immediately call a qualified service technician to inspect the appliance and
replace any gas control that hes been immersed in water.
0803UDSA-2GBEN, Pag. 3/36
1. General
Models UDSA 008-2 through 100-2 are design certified to the CE EN1020 standard for use in industrial and commercial installations only. All models and sizes
are available for use with either natural, propane or butane gas. The type of gas, the
input rate and the electrical supply requirement is shown on the heater rating plate.
Check the rating plate to determine if the heater is appropriate for the intended
installation.
This installation manual is shipped with the heater. Verify that the literature is correct for the heater being installed. If the manual is incorrect for the heater, contact
the supplier before beginning installation.
The instructions in this manual apply only to the models listed.
Installation should be done by a suitably qualified installer in accordance with
these instructions. The installer is responsible for the safe installation of the heater.
2. Installation
codes
These units must be installed in accordance with BS6230 or BS5440 as appropriate plus all local building codes.
3. Warranty
Warranty is void if :
a. Wiring is not in accordance with the diagram furnished with the heater.
b. The unit is installed without proper clearances as soon as clearances are
required regardless of the material being combustible.
c. A fan model is connected to a duct system or if the air delivery system is
modified.
4. Uncrating
and
preparation
This unit was test operated and inspected at the factory prior to crating and was in
proper operating condition. If the heater has incurred damage in shipment, document the damage with the transport company and contact your supplier.
Check the rating plate for the gas and electrical specifications of the heater to be sure
that they are compatible with the gas and electric supplies at the installation site.
Read this booklet and become familiar with the installation requirements of your
heater. If you do not have knowledge of local requirements, check with the gas
supplier and any other local agencies who might have requirements concerning this
installation.
Before beginning, make preparations for necessary supplies, tools, and manpower.
If the installation includes optional vertical louvers or downturn nozzle etc.,
install these options before the heater is suspended. Follow the instructions included in the option package.
0803UDSA-2GBEN, Pag. 4/36
5. Dimensions & Clearances (horizontal orientation=standard)
Figure 1
Top view
Rear view
(all mod. except 035-2,0432,050-2)
Front view
Rear view
( only mod. 035-2,043-2,050-2)
Side view
Legend:
1. Combustion air inlet
2. Flue connection
3. External gas connection
4. Electrical connections
5. Service panel
Table 1 : Dimensions (mm)
T yp e
008 - 011
015 - 020
025 - 030
035 - 050
055 - 064
073 - 100
A
307
383
586
510
663
865
B
700
700
700
971
971
1040
C
267
343
546
456
609
812
D
404
404
404
601
601
651
E
696
723
771
1129
1138
1138
F
546
546
546
897
897
897
G
131
200
368
371
354
562
H
191
191
191
195
207
213
J
129
139
222
126
150
299
K
67
122
122
166
166
186
L
85
86
121
121
204
204
M
413
413
413
623
623
673
N
16
16
16
33
33
33
P
98
98
98
149
149
149
Q
350
350
350
600
600
600
R
120
120
140
140
225
225
0803UDSA-2GBEN, Pag. 5/36
Clearances (mm)
Units must be installed so that the minimum clearances in the following table are
provided for combustion air space, inspection and service and for proper spacing from
combustible materials.
Table 2 : Clearances (mm)
Model
X
Y
Z (*)
U
V
008-2 Æ 030-2
450
50
50
50
850
035-2 Æ 100-2
450
100
100
100
850
(*) : Heaters can be base mounted on suitable non combustible supports.
Attention :
The clearance distance from the flue system must be minimum 150mm at all points !
Combustion air
supply and flue
system diameters
Diameter gas
connection
Table 3 :
Model
Ø flue/ air inlet
(mm)
Ø gas connection
008-2 011-2 015-2 020-2 025-2 030-2 035-2 043-2 050-2 055-2 064-2 073-2 085-2 100-2
80
80
80
80
100
100
100
100
100
130
130
130
130
130
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
3/4"
3/4"
3/4"
3/4"
3/4"
3/4"
3/4"
3/4"
0803UDSA-2GBEN, Pag. 6/36
6. Technical data
Table 4 : Technical data
TYP E S 008-2 Æ 030-2
Type
008-2
011-2
015-2
C omb. A ir & Flue, type B instal.
020-2
025-2
030-2
II2H3+
B22
Gas category
1
1
C 12, C 32, C 42, C52, C 62,C 82
C omb. A ir & Flue, type C instal..
Flue & combustion air connection collars
mm
80
80
80
80
100
100
Heat input (Hs)
Heat input (Hi)
kW
kW
8,8
7,9
13,2
11,9
17,6
15,9
22,0
19,8
30,8
27,8
35,2
31,7
Heat output
Thermal efficiency
Gas consumption rate
kW
%
7,3
92
11,0
92
14,6
92
18,2
92
25,5
92
29,2
92
nat. gas G20
prop. G31
m /h
kg/h
3
0,84
0,62
1,26
0,93
1,68
1,24
2,10
1,55
2,94
2,16
3,36
2,47
K
32
32
32
32
32
32
m /h
rpm
m
3
680
1390
1020
1390
1360
1450
1700
1450
2385
930
2725
930
m
dB(A)
8
47
Gas connection size (not supply line size)
Temperature rise
A irflow
Motor speed
3
Recommanded mounting height
4
Horizontal air throw
5
S ound pressure
E lectrical service (protection class IP2 0)
Total electrical rating
W eight (net)
2
1/2"
TYP E S 03 5-2 Æ 10 0-2
T yp e
10
46
121
W
kg
3,0
2,5
30
03 5-2
3,5
13
16
47
48
230/240V 1N ~ 50Hz
126
33
38
04 3-2
05 0-2
40
0 55 -2
20
50
22
51
273
56
60
0 64 -2
07 3-2
08 5-2
10 0 -2
13 0
10 2,7
9 2,5
8 5,1
92
13 0
11 7 ,3
10 5 ,7
9 7,0
92
II2H3+
G as cate go rie s
C om b. A ir a nd Flue , typ e B insta l.
1
B 22
1
C om b. A ir a nd Flue , typ e C instal.
F lue & co mb ustio n a ir connection colla rs
He at input (Hs)
He at input (Hi)
He at o utp ut
Therma l efficie ncy
G as consump tio n
mm
kW
kW
kW
%
1 00
42 ,2
38 ,0
34 ,9
92
1 00
50 ,8
45 ,8
42 ,1
92
C 12 , C 32 , C 4 2, C 52 , C 6 2,C 82
10 0
1 30
1 30
13 0
58 ,6
66 ,0
77 ,7
8 8,0
52 ,8
59 ,5
70 ,0
7 9,3
48 ,6
54 ,7
64 ,4
7 3,0
92
92
92
92
na t. g as G2 5
p ro p. G 31
m /h
kg/h
3
4,02
2,96
4,85
3,57
5,59
4,12
6,3 0
4,6 4
7,4 1
5,4 6
8 ,39
6 ,18
9 ,79
7 ,21
11 ,1 8
8 ,24
K
3
m /h
rp m
29
3 51 0
9 50
28
4 53 5
9 50
28
5 18 0
95 0
3/4 "
28
28
58 30
68 1 0
9 50
9 00
28
7 77 0
90 0
28
9 06 5
90 0
28
1 03 60
90 0
m
m
25
28
30
d B (A )
55
54
55
W
kg
3 33
88
4 90
99
G as connection size (no t sup py line)
Tem pe ra ture rise
A irflow
M oto r spe ed
Re com m ende d m ounting he ight
4
Ho rizo nta l air thro w
3
5
S o und pressure
E le ctrical se rvice (p ro te ction
Tota l ele ctrical rating
W e ight (net)
2
3 ,5
cla s s IP 2 0)
4 ,0
30
33
56
56
2 30 /24 0V 1N ~ 5 0Hz
49 0
4 90
6 78
99
1 12
1 18
35
36
39
58
59
59
84 8
14 3
84 8
15 8
84 8
16 8
1) Gas Appliance Classifications for Approved Venting Methods based on CEN-report CR1749:2001.
2) There is a difference between the gas connection diameter and the diameter of the supply line. Always use the most adequate dia of the supply line to minimize
the pressue drop through the gas pipes - if necessary, reduce the diameter of the supply line at the inlet of the unit.
3) Height from floor to bottom surface of heater. These are recommendations only. Positioning of unit heaters for proper performance is application dependent.
Operation is affected by other air moving equipment in the space, obstructions to the airflow, draughts and/or close proximity to doors or windows, etc ... Care
should be taken to avoid mounting the heaters above these recommendations, unless downturn nozzle options are used, as significant stratification may
occur resulting in poor floor coverage and higher energy losses through the roof structure.
4) Isothermal conditions +/-20°C ambient air temperature, discharge louvres zero deflection, v = 0,5m/s. The air throw will be influenced by the height of the
building, mounting height of the unit, ambient temperature & adjustment of the louvres.
5) Sound pressure measured in dB(A) : at 5m distance of the heater with A=160m² & Q=2
0803UDSA-2GBEN, Pag. 7/36
7. Flue
requirements
Model UDSA-2 heaters may be installed as Type-B and Type-C installations.
Flue must be in accordance with BS6230 or BS5440. Local requirements may
apply in addition to national requirements. These unit heaters are designed to
operate safely and efficiently with either a horizontal or vertical flue system when
installed with the specific requirements and instructions.
If this heater is replacing an existing heater, be sure that the flue is sized properly
for the heater being installed and that the existing flue is in good condition. A
properly sized flue system is required for safe operation of the heater. An improperly sized flue system can cause unsafe conditions and/or create condensation.
The air heaters 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 heater (type B) (the
combustion air is taken from the space where heater is installed), which requires
only a flue pipe exhausting to outdoors.
All products of combustion must be flued to outdoor atmosphere.
Each heater installed as a type B appliance must be fitted with an individual flue
pipe and the combustion air inlet opening is provided with a protection grill. Each
heater installed as a type C appliance must be fitted with an individual combustion
air/flue pipe system. Type C2 appliance, with single duct system for supply of
combustion air and evacuation of flue gasses, are not allowed.
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.
Diameter & maximum
flue pipe lengths
Flue pipe diameters and maximum pipe lengths in table 5 apply to both horizontal
and vertical systems. Add all straight sections and equivalent lengths for elbow.
The total combined length must not exceed the maximum flue length.
Table 5 : maximum flue system pipe lengths
Model UDS A
Heater socket & pipe dia
mm
M ax. straight length (with wall/roof
terminal)
m
Equivalent length of 45° elbow
m
Equivalent length of 90° elbow
m
•
•
flue pipe
inlet pipe
flue pipe
inlet pipe
flue pipe
inlet pipe
flue pipe
inlet pipe
008-2Æ 020-2
025-2Æ050-2
055-2Æ100-2
80
80
9
9
0.75
0.75
1.5
1.5
100
100
9
9
0.75
0.75
1.5
1.5
130
130
9
9
0.75
0.75
1.5
1.5
Use only one diameter of flue pipe on an installation.
Recommended minimum flue is 1m.
0803UDSA-2GBEN, Pag. 8/36
Flue outlet
Venter outlet attachment requirements:
Depending on the size of flue pipe as determined in table 5, attach either the flue
pipe directly to the collar or a taper-type connector.
WARNING :
Single wall flue pipe exposed to cold air or run through unheated areas should
be insulated to avoid condensation. 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.
For testing, the flue pipe should include a sealable test port.
Ideally the test port should be at least 450mm away from the air heater flue connection
socket. However if a concentric flue fitting is attached directly to the connection
sockets then the combustion should be tested through the flue outlet collar via a
drilled test port which must be securely plugged on completion.
Follow the flue pipe manufacturers installation instructions for making joints, including connections to the air heater, for passing through a building element and for
support requirements.
Gasket sealed single wall flue seamless aluminium or stainless steel pipes are
required. All joints must be sealed to prevent products of combustion from leaking
into the building. If the flue passes through a combustible element of the building
it must be enclosed by a sleeve of non-combustible material and separated from
the sleeve by a minimum of 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 150 mm away from any combustible material.
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 BS6230/BS5440 plus other relevant regulations & rules in force.
Figure 2 : Approved appliances type B
B22 - roof
B22 - wall
0803UDSA-2GBEN, Pag. 9/36
Figure 3 :
Type B appliances : Combustion air and flue pipe sockets
all mod., except. 035-2,043-2, 050-2
only mod. 035-2, 043-2 & 050-2
1) Flue pipe outlet collar
2) Combustion air inlet opening
Air supply
WARNING :
When these air heaters are
installed in type B applications, designed to take air
for combustion from the
space in which it is installed.
Do not restrict the combustion air intake.
It is important to ensure that there is an adequate air supply at all times for both
combustion and heating requirements. Modern buildings involve greater use of
insulation, improved vapour barriers, and weather proofing. These practices mean
that buildings are sealed much tighter than in the past.
Proper combustion air supply for a power vented Type B installation requires ventilation of the heated space. Natural infiltration of air may not be adequate. Use of
exhaust fans aggravates this situation. It is important to ensure that there is adequate combustion air supply at all times. Reliance on doors and windows is not
allowed.
Always ensure that adequate combustion air is provided to suit the total installation of all combustion equipment in accordance with BS6230 or BS5440
as appropriate.
Ensure that the air combustion inlet opening at the rear side of the unit cannot be
obstructed (cfr. fig. 3).
0803UDSA-2GBEN, Pag. 10/36
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 duct
that obtains outdoor air and a flue pipe that exhausts flue products to outdoors.
Both the flue and combustion air pipes must be sealed.
Type C2 appliances must not be applied !
Figure 4 : Approved appliances type C
C12
C32 / C62
C12b/C62
C52
Figure 5 : Type C appliances : Combustion air and flue pipe sockets
all mod. except. 035-2, 043-2 & 050-2
only mod. 035-2, 043-2, 050-2
1) Flue pipe outlet collar
2) Combustion air pipe inlet collar
0803UDSA-2GBEN, Pag. 11/36
8. Location heater
Remark:
Flue requirements may
affect location. Consult
section 7 before making
a final determination.
Use the minimum clearances in section 5 and the throw data in the technical data
table of section 6 when determining where to suspend the heater.
Recommended minimum height is 2.5mm.
WARNING: If touched, the vent pipe and internal heater surfaces
that are accessible from outside the heater will cause burns. Suspend
the heater such that these components cannot be touched.
For best results, the heater should be placed with certain rules in mind. Always
ensure that minimum clearances are maintained. Locating a unit heater above the
maximum recommended height can result in significant air stratification. When
possible, heaters should be arranged to blow toward or along exposed wall surfaces.
Suspended heaters are most effective when located as close to the working zone as
possible, but care should be exercised to avoid directing the discharged air directly
on to room occupants.
Partitions, columns, counters, or other obstructions should be taken into consideration when locating the unit heater so that a minimum quantity of airflow will be
deflected by such obstacles.
When units are located in the centre of the space to be heated, the air should be
discharged toward the exposed walls. In large areas, units should be located to
discharge air along exposed walls with extra units provided to discharge air in
toward the centre of the area. For optimum results heaters are best used in conjunction with recirculating air fans suspended at high level.
At those points where infiltration of cold air is excessive, such as at entrance doors
and shipping doors, it is desirable to locate the unit so that it will discharge directly
toward the source of cold air, typically from a distance of 4.5 to 6.0 meters or
install a downflow unit over the door opening.
CAUTION : Do not locate the heater where it may be exposed to water.
Hazards of Chlorine apply to the location
of the combustion air
inlet
The presence of chlorine vapours in the combustion air of gas-fired heating equipment presents a potential corrosion hazard. Chlorine, found usually in the form of
freon or degreaser compounds when exposed to a flame will precipitate from the
compound, and go into solution with any condensation that is present in the heat
exchanger or associated parts. The result is hydrochloric acid which readily attacks all metals. Care should be taken to separate these vapours from the combustion process. This may be done by wise location of the unit flue and combustion
air terminals with regard to exhausters or prevailing wind directions. Chlorine is
heavier than air. Keep this fact in mind when determining installation location of
the heater in relation to building exhaust systems.
Where chlorine vapours are prevalent heaters with special grade 316 A1SI stainless steel heat exchangers are recommended.
0803UDSA-2GBEN, Pag. 12/36
9. Hanging
the heater
WARNING:
Check the supporting
structure to verify that it
has sufficient loadcarrying capacity to
support the unit weight.
Suspend the heater only
from the threaded nut
retainers or with a
manufacturer provided kit.
DO NOT suspend from the
heater cabinet panels. .
Before suspending the heater, check the supporting structure to verify that it has
sufficient load-carrying capacity to support the weight of the unit.
Leave the unit on the pallet. If the bottom of the unit is not supported or protected
damage can occur.
Table 6 : weights (kg)
Size 008-2 011-2 015-2 020-2 025-2 030-2 035-2 043-2 050-2 055-2 064-2 073-2 085-2 100-2
kg
30
33
38
40
56
60
88
99
99
112 118 143 158 168
Warning : Do not place or add additional weight to the suspended heater.
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 figure
6 for hanger rod size.
Figure 6 : Suspending the heater with rods from the threaded nut retainers
Add a nut to lock the M10x1.5
hanger rod to the heater
Detail
Be sure that the threaded hanger rods are locked to the heater as illustrated in
figure 6. Recommended maximum hanger rod length is 1.8m. Where longer drops
are required, ensure that restraints are fitted to prevent excess lateral movement
and supports are adequately sized.
0803UDSA-2GBEN, Pag. 13/36
Figure 7 :
Wall bracket kits (optional)
When desired the heaters may be supported by wall brackets. Supporting in this
manner allows the heaters to be placed in close proximity to the ceiling or mounted
directly to the vertical supporting structures of the building. There are 2 different
wall bracket designs for UDSA-2 models as shown in the illustrations below.
Mounting instructions are detailed in the literature supplied with these
optional kits
Types 008-2 -> 030-2
Types 035-2 -> 100-2
0803UDSA-2GBEN, Pag. 14/36
10. Gas Piping and
pressures
WARNING: All
components of a gas
supply system must be
leak tested prior to placing
equipment in service.
NEVER TEST FOR
LEAKS WITH AN OPEN
FLAME. Failure to
comply could result in
personal injury, property
damage or death.
Warning : This appliance is equipped for a maximum gas supply pressure of
50 mbar.
WARNING : Pressure testing supply piping
Test pressures above 50mbar : Disconnect the heater and manual valve from the
gas supply line which is to be tested. Cap or plug the supply line.
Test pressures below 50mbar : Before testing, close the manual valve on the
heater.
All piping must be in accordance with requirements outlined in the National Gas
Codes (different for each country). Gas supply piping installation should also conform with good practice and any local codes. Support gas piping with pipe hangers, metal strapping, or other suitable material. Do not rely on the heater to support the gas pipe.
All sealing products shall be resistant to the action of liquefied petroleum gas or
any other chemical constituents of the gas being supplied.
Install a ground joint union and manual shutoff the gas cock upstream of the unit
control system.
The unit is equipped with a nipple that extends outside the cabinet. The gas connection is 1/2” or 3/4”, dependent on the size of the unit.
Leak test all connections by brushing on a leak detecting solution.
Diameter gas connection
Table 7 :
Nat gas
Propane
Model 008-2 through 030-2
Model 035-2 through 100-2
WARNING :
Do not o
ver tighten and
ov
do not rrota
ota
te the g
as
otate
gas
valv
e inside the hea
ter
alve
heater
contr
ol compar
tment.
control
compartment.
1/2”
3/4”
Figure 8 : gas connection
0803UDSA-2GBEN, Pag. 15/36
11. Electrical
supply and
connections
DANGER :
THIS APPLIANCE
MUST BE
EARTHED.
The electrical installation may only be carried out by an appropriately qualified
person current to IEE Regulations. The supply line to the heater should include
a main switch. The minimum clearance distance between the contacts must be
more than 3 mm.
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.
Attention :
Serious damage can occur to burner relay when faulty connection of thermostat,
reset switch or burner failure lamp.
Switching of wires for reset switch and flame failure (e.g. in a remote control
box) will destroy the burner relay.
The minimum external control required for the air heater is a room thermostat.
It is essential that the main input line and neutral to terminals L and N
remain live at all times even when the heater is switched off to ensure
correct operation of the unit.
A burner reset switch with red indicator light is fitted on the heater. 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 must be determined. After determining and correcting the problem,
restart the heater and monitor long enough to ensure proper operation
(approx. 5 minutes).
An orange indicator light is fitted on the heater to signify when the burner is on.
Ensure that all cables and installers wiring are fixed to the gas pipe and that they
do not touch the combustion collector box.
Thermostat location
Do not attempt to control more than 1 air heater from a single thermostat or
control panel unless a properly wired relay is fitted. Follow the instructions
supplied with such panels.
The location of the room thermostat or sensor is very important. It should not be
positioned on a cold wall or cold surface. Avoid location in draughty areas or
where it may be influenced by heat sources e.g. the sun, process plant, etc. The
thermostat should be mounted on a vibration free surface and mounted about 1,5
metres above floor level. Follow the thermostat manufacturers instructions. The
thermostat must be suitable for potential free contacts.
0803UDSA-2GBEN, Pag. 16/36
Figure 9 : Wiring connections on the terminal board
0803UDSA-2GBEN, Pag. 17/36
12. Check installation
&
start-up
Check the installation prior to
start-up
† Check suspension. Unit must be secure.Verify that no other parts are
fitted which are not individually supported and secured.
† Check clearances from combustibles. Requirements are in section 5.
† Check vent system to be sure that it is installed according to the
instructions in section 7, venting requirements.
† Check piping for leaks and proper gas line pressure. Bleed gas lines of
trapped air.
† Check electrical wiring and ensure that wiring conforms with the wiring
diagram. Be sure all wire sizes meet requirements.
† Check polarity. Verify that line voltage exists between the black “L1”
and earth ground.
† Verify that the appliance is earthed by conducting an earth continuity
test.
Heater start-up
WARNING:
For your safety, follow the instructions exactly otherwise damage or
injury could occur.
• This heater does not have a pilot flame. It is equipped with an ignition
device which automatically lights the burner. Do not try to light the
burner by hand.
• Before operating, smell all around the heater area for gas. Be sure to
smell next to the floor because propane gas is heavier than air and
will settle near the floor.
• Do not use this appliance if any part has subjected to water ingress.
Immediately call a qualified service technician to inspect the appliance
and to replace any part of the control system and any gas control.
• When overheating occurs or when gas supply is not turned off, shut
the manual gas tap before turning off the electric power.
0803UDSA-2GBEN, Pag. 18/36
Operating instructions
and operating sequence
1. Set thermostat to the lowest setting.
2. Turn off all electric power to the heater.
3.
Shut the gas cock at the inlet of the unit.
4.
Wait five (5) minutes to clear out any gas. Then smell for gas, including
near the floor. If you smell gas, STOP! and follow the steps in the WARNINGS printed on page 3. If you do not smell gas, proceed to the next step.
5.
6.
Turn on the electric power to the heater.
Open the gas cock at the inlet of the unit.
7.
If fitted, ensure that a time switch is set to an ‘ON’ period.
8.
Adjust the thermostat to the required setting (must be above current room
temperature).
Note :
If the appliance does not operate, follow the instructions "To turn off gas
supply at the Appliance" printed below and call your service technician.
9. Thermostat calls for heat, energyzing the venter motor.
10. When adequate air flow for combustion is proven by an air proving switch
and a prepurge period has elapsed, the integral ignitor and multifunctional gas control operate. The ignition spark ignites the gas creating the
burner flame.
11. Burner flame is sensed by a flame rod sensor and when the heat exchanger
is warmed up (+/- 30 seconds) and the fan control relay closes, the fan
motor is energized.
12. If the flame is extinguished during the main burner operation, the integrated control system closes the main valve and attempts to relight the
burner. The unit will attempt 5 ignitions before entering a “lock out” mode.
Lock out is indicated by the red warning light on the heater. To end this
mode push on the reset switch.
13. To turn the 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.
14. To turn the heater ‘OFF’ for long periods : see ‘To turn off gas supply at
the appliance’ below.
Check installation after
start-up
TO TURN OFF GAS SUPPLY AT THE APPLIANCE
1) Set thermostat to the lowest possible setting or ‘OFF’ position.
2) Shut off the gas tap when the fan has stopped.
3) Switch off electric power to the appliance.
† Check gas pressure as described in detail below.
† Turn the unit off and on, pausing 2 minutes between each cycle. Observe for
smooth ignition.
† Set the thermostat to the required room temperature.
† Place this booklet and any control or optional information in an accessible
location near the heater or give this information to the end user.
0803UDSA-2GBEN, Pag. 19/36
Burner gas pressure
adjustment
The gas pressure is set for the required heat input before the appliance leaves the
factory. Provided that 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 use the following procedure:
* Ascertain from the heater’s data plate the correct operating gas pressure;
* 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 10a & 10b);
* Adjust the room thermostat to call for heat i.e. above room ambient temperature;
* Observe the burner gas pressure on the manometer and compare to the required pressure on the data plate;
* If necessary, adjust the burner gas pressure. Remove the cover screw (models
035-2 - >100-2) or cover cap (models 008-2 -> 030-2). Turn the regulator
screw anti-clockwise to decrease pressure or clockwise to increase pressure
(see figure 10a & 10b);
* Set room thermostat to lowest setting to turn OFF the burners. Replace the test
point screw/cap and with the main burner OFF, test for gas soundness using a
leak detector fluid.
Reset temperature control/room thermostat to comfort operating level.
Figure 10a : Honeywell gas valve (types 008-2 -> 030-2)
1
5
2
3
4
6
8
7
7
Legend:
1) Shut-off solenoid valve EV1
2) Pressure regulator setting device, or, alternatively, outlet flow setting screw
3) Inlet pressure test point
4) Outlet pressure test point
5) Shut-off solenoid valve EV2
6) Pilot outlet
7) Main gas outlet
8) Holes (M5) for fixing flanges
0803UDSA-2GBEN, Pag. 20/36
Figure 10b : HONEYWELL gas valve (type 035-2 -> 100-2)
6
8
7
5
1
3
2
4
Legend
1) Gas inlet
2) Gas outlet
3) Inlet pressure tap
4) Outlet pressure tap
5) 6.3mm AMP terminals and screws for wiring
6) 6.3mm AMP terminals
7) Earth terminal/screw (line voltage models only)
8) Pressure regulator adjustment screw
Table 8 : Burner jets and pressures
008-2 011-2 015-2 020-2 025-2 030-2 035-2 043-2 050-2 055-2 064-2 073-2 085-2 100-2
Nat. Gas
(G20)
Prop.
(G31)
Burner jet
Burner
pre ssure
Burner jet
Burner
pre ssure
dia
2,60
3,20
3,70
4,20
4,80
5,30
5,75
6,50
6,80
7,10
8,00
mbar 8,00
7,90
7,80
7,10
8,20
7,50
7,90
7,10
7,90
8,40
7,90 12,00 8,00
7,10
1,70
1,95
2,15
2,60
2,80
3,10
3,35
3,70
3,90
4,15
5,20
dia
1,40
7,40
4,50
8,90 10,00
4,90
mbar 36,90 36,90 36,90 36,90 36,80 36,80 36,00 35,90 35,80 35,70 35,60 35,10 34,60 34,50
inlet pressure
20mbar
inlet pressure
37 mbar
Minimum inlet pressure natural gas G20 : 16,6mbar
Minimum inlet pressure propane gas G31 : 35,2mbar
0803UDSA-2GBEN, Pag. 21/36
Ignition
system
Normal Heat
Cycle Operating
Sequence
This heater is equipped with a direct spark integrated control relay. The control
relay monitors the safety devices and controls the operation of the venter motor
and the gas valve between heat cycles.
The time line below illustrates a normal heat cycle.
Power to gas valve and ignitor
Start pre-purge
Sensor checks for the presence of a flame
Energisation of venter motor.
If the differential pressure switch
is in normally closed position
(start position).
End of heat demand.
De-energisation of gas valve.
De-energisation of venter motor
Start position
Pre-purge
time
Ignition
time=
Safety
time
20 sec
5 sec
Normal operation
of burner relay
Post-purge time
10 sec
time
First heat demand signal.
Check on pressure switch.
Must be in closed or start position.
If not, there will be no power to
the venter motor.
The power to the burner relay is off
until the pressure switch goes to
normally closed - or start position.
Safety check on flame sensor.
If there is a flame, the relay will
go to lock-out. The light in the red reset
switch, mounted visibly on the heater
will glow.
If no flame, then repeat starting
at pre-purge for 5 attempts.
If no ionisation after 5 attempts, then
lock-out.
Line output during ignition time to control
high fire start on two stage or modulation
applications.
Definitions
Start position: The system is not in lock-out position and can proceed with the start-up sequence upon a demand for heat.
Pre-purge time:This is a period of 20 seconds during which the combustion fan (venter) operates prior to activation of the ignition device.
Safety time:
The safety time is the delay between the gas valve being energised and the flame sensor checking for the presence of a
flame. This is a period of 5 seconds.
Note: If no flame is sensed, the burner relay will attempt ignition 5 times before going into lock-out mode.
Post-purge time:
This is the time of 10 seconds between burner shut-down and the moment the combustion fan (venter) is de-energized.
0803UDSA-2GBEN, Pag. 22/36
13. Maintenance
& Service
Warning :
If you turn off the power
supply, always turn off
the gas.
The material contained in the MAINTENANCE AND SERVICE Section of this
manual is designed to aid a qualified service technician in maintaining and servicing this equipment. This heater will operate with a minimum of maintenance. To
ensure long life and satisfactory performance, a heater that is operated under normal conditions should be inspected and cleaned at the start of each heating season
(inspection and maintenance at least once a year). If the heater is operating in an
area where an unusual amount of dust or other impurities are present in the air,
more frequent maintenance is recommended.
When any service is completed, be careful to reassemble correctly to ensure that
no unsafe conditions are created. When starting the heater, always follow the lighting instructions on the heater.
Maintenance Schedule - The following procedures should be carried out at least
once each year (See figure 11a) :
Maintentance Schedule
• Clean all dirt, lint, and grease from the fan blade, fan guard, and motor.
• Check the heat exchanger both internally and externally for evidence of physical damage.
NOTE: If replacement
parts are required, use only
factory-authorized parts.
• Check the burner for scale, dust, or lint accumulation. Clean if required.
• Check the vent or vent/combustion air system for soundness. Replace any parts
that do not appear sound.
• Check the wiring for any damage. Replace damaged wiring.
Figure 11a-Location of controls
12
11
2
10
8
Legend:
1) Burner
2) LC3 limit control
3) Burner operating light (H6)
4) Reset switch (S3)
5) Spark ignitor (ER)
6) Control panel assy (fig. 11b)
7) Gas valve (V1)
8) Fan motor (M1)
9) Venter motor. Venter motor is
in the same location for all
models, but appearance may
differ (M3)
10) Fan control (FC)
11) Limit control LC1
12) Flame sensor (IS)
13) Reset LC3 (limit control)
Sensor bulb is located in the air
outlet of the heater.
14) Fuse (F3.1)
4
3
1
5
7
13
14
6
0803UDSA-2GBEN, Pag. 23/36
9
Figure 11b - Control panel
assy located on a removable
bracket
15
17
18
Legend:
15) Control relay (ER)
16) Terminal blocks
17) 2 stage burner relay K1.2 (option)
(not illustrated)
18) Relay (K1.6)
19) Connector
20) Filter
21) Pressure switch (S3)
22) Electronic burner relay fuse
21
22
19
14. Heat exchanger
Maintenance
16
20
This heater is equipped with a patented T-CORE2® heat exchanger.
Remove any external dirt or dust accumulation. Visually check the heat exchanger
for cracks and holes. If a crack or hole is observed, replace the heat exchanger.
0803UDSA-2GBEN, Pag. 24/36
15. Burner
Maintenance
Burner removal
2
This heater has a unique one-piece T-CORE ® burner assembly designed to provide controlled flame stability without lifting or flashback. The burner can be
removed as a unit for inspection or service : see below for removal instructions.
Inspect the burner/control compartment annually to determine if cleaning is necessary. If there is an accumulation of dirt, dust, and/or lint, clean the compartment
and follow the instructions below to remove and clean the burner.
Caution : use of eye protection is recommended.
Instructions for burner removal (see fig. 11a)
1. Outside the cabinet, shut the gas supply off at the manual valve ahead of the
union
2. Turn off the electric supply.
3. Disconnect the gas supply at the union outside of the cabinet.
4. Open the access door.
5. Disconnect the manifold and move it out of the way. At the gas valve, mark
and disconnect the connector. Carefully remove the burner orifice and orifice
adapter locking nut. Slide the orifice adapter out through the bracket on the
burner pushing the manifold to the right. This will move the manifold out of the
way. Refer to figure 14 for component definitions.
Figure 12a
Figure 12b
Burner orifice
Locking nut
Orifice adapter
0803UDSA-2GBEN, Pag. 25/36
6. Remove burner
a) Locate the burner body front support. Remove
the screws that attach it to the secondary air
shield. Refer to fig. 14 for component definitions.
Figure 13a
b) Holding the venturi tube, slide the entire burner
slightly to the right to disengage the burner from
the supports on the left. Then rotate the open end
of the venturi tube outward away from the heater.
Carefully pull the burner assembly out of the cabinet.
Figure 13b
Figure 14 - Burner removal
steps
2. Remove screws attaching burner
3. Venturi tube : slide right, rotate outward, pull
out
1. Disconnect manifold at orifice and
outside the heater, slide to the right
0803UDSA-2GBEN, Pag. 26/36
Inspect and clean the burner
With the burner assembly removed, shine a flashlight on the burner ribbons. Look
for carbon buildup, scale, dust, lint, and/or anything that might restrict flow through
the spaces between the burner ribbons. Holding the burner assembly so that any
foreign material will fall away from the burner, use a stiff bristle brush to loosen
Figure 15
and remove any foreign material(s). If the burner is excessively dirty, remove one
of the burner end caps. Remove the four screws that hold the end cap to the burner
housing. Lightly tap the end cap to remove it.
Clean all foreign material from the burner and venturi. After the burner is thoroughly clean, replace the end cap making certain that it is tight against the burner
housing. NOTE: If any of the burner components are damaged or deteriorated,
replace the burner assembly.
Inspect the Internal Portion of the Heat Exchanger (with burner
assembly removed)
At the burner flame entrance of each tube, shine a bright light into each heat exchanger section. With the light shining into the heat exchanger, observe the outside surface of the tube where discoloration is evident. Repeat this procedure with
each heat exchanger tube. If any light is observed in these high temperature regions, replace the heat exchanger.
Reinstall the burner
Repeat ‘Burner removal’ steps above in the opposite order.
16. Burner orifice
The burner orifice normally needs to be replaced only when a change in gas is
made. When ordering a replacement orifice, provide (MJ/m3) heating value and
specific gravity of gas, as well as the model and serial number of the unit. When
removing or replacing the burner orifice be careful not to damage the venturi tube
and/or the bracket.
17. Ignition system
Ignitor - Refer to figure 11a and locate the ignitor. Disconnect the wire; remove
the screw and the ignitor. Clean the ignitor assembly with an emery cloth.
Spark gap must be maintained to 3 mm. See FIGURE 16a.
Important : When reassembling, the wire must remain attached to the ignitor.
0803UDSA-2GBEN, Pag. 27/36
Figure 16a
Ignitor showing required
spark gap measurement
Figure 16b
Flame sensor
Caution : Due to high voltage
on the spark wire and electrode,
do not touch when energized.
Flame sensor - Refer to figure 11a and locate the flame sensor. Disconnect the
wire, remove the screw and the flame sensor. Clean with an emery cloth..
Control relay - See figure 17. The electronic burner relay monitors the operation
of the heater including ignition. Do not open the control relay. Each heating
season check the lead wires for insulation deterioration and good connections.
Proper operation of the direct spark ignition system requires a minimum flame
signal of 1.0 microamps (DC) as measured by a microammeter.
For further information and check out procedure on the direct spark ignition system, refer to section 12 and the Troubleshooting Flow Chart in section 25.
Figure 17 - Control relay
Fuse
18. Fan motors
19. Fan motor,
Fan blades
&
Guard
The fan motor is equipped with thermal overload protection of the automatic
reset type. Should the motor fail to run, it may be because of improper voltage
characteristics. Make certain that the correct voltage is available at the motor.
Remove dirt and grease from the motor, the fan guard, and blades. Use care when
cleaning the fan blades to prevent causing misalignment or imbalance. Check that
the hub of the fan blades is secure to the shaft.
Follow these instructions for replacement of the fan guard, fan motor and/or fan
blades.
1. If the heater is installed, turn off the gas and disconnect the electric power.
2. Open the access door and disconnect the fan motor wires.
0803UDSA-2GBEN, Pag. 28/36
Figure 18 - Fan blade position
on the motor shaft
3. Remove the fan assembly (fan guard, motor and fan blade).
4. Disassemble and replace parts as needed, then reassemble.
Be sure the fan blade is in the proper position on the shaft; refer to the illustration and table in figure 18.
Table 9 : Dimensions A
S ize
008 011 015 020
mm
29 23
50
49
Fan
ventilatormotor
motor
Fan
blade
ventilatorwiel
20. Venter motor
& wheel
025
83
030
80
035
80
043
87
050
87
055
91
064
95
073
89
085
86
100
89
Position the assembly on the heater and attach the fan guard.
Rotate the fan blade by hand to check for adequate clearance. If adjustment is
required, loosen the mounting screws, reposition the fan guard, and tighten the
screws. Rotate the fan blade and recheck for adequate clearance. Repeat this
procedure until the assembly is positioned properly.
5. Reconnect the fan motor wires according to the wiring diagram and close the
access door.
6. Restore power to the heater and turn on the gas. Light, following the instructions
on the lighting instruction plate. Check for proper operation.
Remove dirt and grease from the motor casing, the venter housing, and the venter
wheel. Venter motor bearings are permanently lubricated.
Follow these instructions for replacement of the venter motor and wheel assembly.
Keep all hardware removed to be used in reassembling and installing the replacement parts.
1. Turn off the gas and disconnect the electric power.
2. Open the control compartment access door.
3. Disconnect the three venter motor wires at the control relay and ground screw
(located on the control panel).
4. Holding the motor, remove the screws that attach the motor plate to the venter
housing. Remove the motor and wheel assembly from the heater.
5. Reassemble with the replacement venter motor and wheel assembly.
6. Follow the wiring diagram to properly connect the wires.
7. Restore power to the heater and turn on the gas. Light, following the instructions
on the lighting instruction plate. Check for proper operation. Replace the access
door.
binnenmaat
0803UDSA-2GBEN, Pag. 29/36
Venter wheel position on
shaft
UDSA models 008-2 - 020-2
(Rotation clockwise from motor shaft end)
Figure 19
Venter motor
plate
Motor mounting
bracket
Venter
wheel
Motor cooling fan
8 mm
8
UDSA models 025-2 - 030-2
(Rotation clockwise from motor shaft end)
Figure 20
Venter
wheel
Venter
motor plate
Motor mounting
bracket
Motor
cooling fan
8 mm
0803UDSA-2GBEN, Pag. 30/36
UDSA models 035-2 - 100-2
(Rotation counter clockwise from motor shaft end)
Figure 21
Venter motor
plate
Motor mounting
bracket
Venter
wheel
Motor cooling
fan
8mm
8 mm
21. Operating
gas valve
WARNING: The operating
valve is the prime safety
shutoff. All gas supply lines
must be free of dirt or scale
before connecting to the
unit to ensure correct
sealing.
The main operating quick opening gas valve is powered through the thermostat
and safety controls. The main control valve is of the diaphragm type providing
regulated gas flow and is preset at the factory. The gas valve requires no field
binnenmaat
maintenance except careful removal of external dirt accumulation
and checking of
wiring connections. Instructions for testing pressure settings are in section 12.
Figure 22
Figure 23
Gas valve
(UDSA models 008-2 - 030-2)
Gas valve
(UDSA models 035-2 - 100-2)
0803UDSA-2GBEN, Pag. 31/36
22.
Combustion
air pressure
switch
DANGER : Safe operation of this
unit requires proper venting flow.
Never bypass the combustion air
pressure swtich or attempt to
operate the unit without the
venter operating.
23.
Limit controls
If a limit control needs replacing,
use only the factory authorized replacement part for the size of
heater.
For approximate limit locations,
see figure 11a..
The combustion air pressure switch ensures that proper combustion airflow is
available. The switch senses the differential pressure between the negative
pressure in the flue gas collector box and the pressure in the control section.
(For switch location, see figure 11b).
On startup when the heater is cold, the sensing pressure is at the most negative
level, and as the heater and flue system warm up, the sensing pressure becomes less negative.
If a restriction or excessive flue pipe length causes the sensing pressure to be
below the allowable level, the pressure switch will shut off the main burner.
Figure 24
See figure 10, for location. If it is
determined that the pressure
switch needs replacing, use only
the factory-authorized replacement part that is designed for the
model and size of heater being
serviced.
All units are equipped with temperature activated limit controls. The controls
are factory set and non-adjustable. If either setpoint is reached, the corresponding limit control will interrupt the electric power to the gas valve. These safety
devices provide protection in the case of motor failure or lack of airflow due to
restrictions. (For locations, see figure 11a.)
Figure 25 : LC1
Figure 26 : LC3
Warning :
Never bypass the limit controls,
hazardous conditions could result.
Figure 27 : Fan control (KFC)
0803UDSA-2GBEN, Pag. 32/36
24.
Flue and
combustion
air piping
Check the complete system at least once a year. Inspection should include
all joints, seams, concentric adapters and the flue terminal cap. Replace
any defective or heavily corroded parts.
25. Troubleshooting
The integrated control relay monitors the operation of the heater. If the
heater fails to operate properly, review the flow chart below and see the
operating sequence in section 16.
The general troubleshooting charts on the following pages will also help
you to determine the problem.
Control relay
Troubleshooting flowchart
Trial for ignition
Call for heat
Is there a
spark across
gap at igniter?
NO
YES
Is there line
voltage at spark
igniter?
NO
Check connection at spark
igniter
Replace igniter
Is there line
voltage to the
control relay?
YES
Replace control
relay
NO
Check wiring
connections
0803UDSA-2GBEN, Pag. 33/36
Trial for ignition
Call for heat
Is there a
spark across
gap at igniter?
YES
Does gas
ignite?
YES
Is there m in.
flame current at
the flam e
sensor?
YES
NO
Is there m in.
flame current at
the control
m odule?
Is the flame
s ensor
corroded?
NO
YES
Check connections to flame
sensor and/or m oisture in
the burner assem bly
Clean flame sensor
with emery cloth or s teel
wool
YES
NO
Replace control module
Is the sensor
located in flam e?
Is the heater
grounded
(earthed)?
YES
NO
Repos ition flame
sensor
Trial for ignition
Call for heat
Is there a
spark across
gap at igniter?
YES
YES
Replace flame s ensor
NO
Connect ground wire (earth)
to unit chassis
Does gas
ignite?
NO
Is gas flowing?
NO
YES
Is burner jet opening
correct size for gas
used (check rating label
Is there line
voltage to the gas
valve?
Change injector (correct
size shown on heater
rating label)
NO
on heater)
YES
NO
YES
Replace gas valve
Air in the gas line
Is there line
voltage from
valve output on
control module
to chassis?
YES
Check wiring &
connection to gas valve
Is the igniter
position correct
in the gas flow?
NO
YES
NO
Bleed air from gas
line
YES
Check gas pressure & supply
voltage. If either are low, correct and
repeat startup
Replace ignition
control module
NO
Reposition spark igniter
0803UDSA-2GBEN, Pag. 34/36
General Troubleshooting
P ROBLEM
Venter
motor will
not start
P ROBABLE CAUS E
1. No power to unit.
2. No power to venter motor.
3. Integrated burner relay defective.
4. Defective venter motor.
5. Fluse blown (F3.1).
6. Fuse burner relay blown.
7. LC1 open.
REM EDY
1. Turn on power, check supply fuses or circuit breaker.
2. Check connections at burner relay and/or venter motor terminals.
3. Replace burner relay.
4. Replace venter motor. See Section 26.
5. Replace fuse.
6. Replace fuse.
7. a) Set heater on ventilation until LC1 closes.
b) Replace LC1.
c) Check if there is obstruction at the fan side.
8. a) Reset LC3.
8. LC3 open.
b) Replace LC3.
9. Unit in lock-out.
9. Push on reset button.
10.Set thermostat above room temperature.
10.Room thermostat open.
Burner will 1. Main valve not operating.
1. a) Check voltage on valve during ignition period.
not light
b) Check connector on main gas valve.
c) Check connector on burner relay.
d) Replace valve.
2. Purge gas line.
2. Air in the gas line.
3. Gas pressure too high or too low.
3. a) Supply pressure should be 15 mbar for natural gas (UK only) or 37 mbar
for propane gas (UK only).
b) Obstruction in the gas line.
c) Gas line connection diameter too small.
4. Check the following :
4. No Spark:
a) Be certain all wire connections are solid.
a) Loose wire connections.
b) Incorrect spark gap.
b) Maintain spark gap at 3 mm.
c) Replace worn or grounded spark cable.
c) Spark cable has a short circuit to ground.
d) Spark electrode has a short circuit to ground. d) Replace if ceramic spark electrode is cracked or grounded.
e) Check burner relay ground wire.
e) Burner relay not grounded.
f) Unit not properly grounded.
f) Make certain unit is properly field grounded (earthed) and properly phased
(L1 to hot lead L2 to neutral).
g) Faulty burner relay.
g) If voltage is available to the burner relay and all other causes have been
eliminated, replace burner relay.
5. Combustion air pressure switch
5. First check the following :
not closing upon power to venter.
a) Make sure unit is properly vented.
b) Remove obstructions from vent.
c) Replace faulty tubing to pressure switch.
d) Replace faulty pressure switch.
Burner cycle 1. Gas pressure too high or too low.
1. Supply pressure should be 15 mbar for natural gas (UK only) or 37 mbar
on and off
for propane gas (UK only).
2. Burner relay not grounded.
2. Check burner relay ground wire connection.
3. Faulty burner relay.
3. If (220/240) volts is available to the burner relay and all other causes have
been eliminated, replace burner relay.
4. Flame sensor grounded.
4. Be certain flame sensor lead is not grounded or insulation or ceramic is
not cracked. Replace as required.
5. Cracked ceramic at sensor.
5. Replace sensor.
6. Incorrect polarity.
6. Check polarity switch and if necessary reverse line voltage wires to
terminal block connections.
F an motor
1. Circuit open.
1. Check wiring and connections.
will not run 2. Defective fan control (FC).
2. a) Replace fan control.
b) Check voltage on anticipation resistor when gas valve is open.
3. Defective motor.
3. Replace motor or starter.
F an or
1. Motor internal thermal protection device
1. Check motor load against motor rating plate. Replace motor if needed.
venter motor cycling on and off.
turns on and
off while
burner is
operating
0803UDSA-2GBEN, Pag. 35/36
26. Parts list
Description
Control relay
Spark ignitor
Flame sensor
Limit control LC3
Limit control LC1
Fan control KFC
Pressure switch
Pressure switch
Pressure switch
Relay
Burner-on indication lamp
Reset switch
Mains filter
Gas valve nat. gas 1st
Gas valve nat. gas 1st
Gas valve nat. gas 2st
Gas valve prop. 1st
Gas valve prop. 1st
Gas valve prop. 2st
Gas valve plug + wire
Gas valve plug + wire
Venter motor
Venter motor
Venter motor
Venter assembly
Venter assembly
Venter assembly
Venter wheel assy
Venter wheel assy
Venter wheel
Fan motor
Fan motor
Fan motor
Fan motor
Fan motor
Fan motor
Axial fan
Axial fan
Axial fan
Axial fan
Axial fan
Axial fan
Axial fan
Axial fan
Axial fan
Axial fan
Axial fan
Axial fan
Axial fan
Main wiring assy 1st
Main wiring assy 2st
Venter wiring assy
Relay 2st
Subject to modifications
Application
UDSA-2
008 … 100
008 … 100
008 … 100
008 … 100
008 … 100
008 … 100
'043
'073
allsizes, exc 043,073
008 … 100
008 … 100
008 … 100
008 … 100
035 … 100
008 … 030
008 … 100
008 …030
035 … 100
008 … 100
035 … 100
008 … 030
008 … 020
025 … 030
035 … 100
008 … 020
025 … 030
035 … 100
008 … 020
025 …030
035 … 100
008 - 011
015 - 020
025 - 030
'035
043 ... 055
064 … 100
008
011
015
'020
025
030
'035
043-050
055
064
073
085
100
008 … 100
008 … 100
008 … 020
008 … 100
Partnumber (PN)
03 25322
05 25162
03 401US 195292
03 24959-03
03 24959-04
03 25167
30 60607 94
30 60607 130
30 60607 120
30 61742 240V
60 61996
60 61988
30 61747
03 25136
03 25141
03 25136 02
03 25142
03 25134
03 35136 02
03 25136 V1
03 25141 V1
11 43430 01
11 43426 04
11 43426 04
35 25218
35 25222
35 25223
90 82242
90 82244
02 25728
01 25630
01 25631
01 25632
01 25633
01 25636
01 25638
02 25701
02 25701 01
02 25702
02 25702 01
02 25705
02 25705 01
02 25703
02 25732
02 25731
02 25733
02 25716
02 25717
02 25719
21 41642 P01
06 41640 02
06 41640
30 61736 230V
0803UDSA-2GBEN, Pag. 36/36
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