Ambirad UDSA 008 Guide

0502UDSAAMEN
UDSA 008 - 100
Gas fired Balanced flue / Fan assisted
flue unit heater
INSTALLATION
COMMISSIONING
SERVICING
TheseappliancesmeetthefollowingECDirectives:
DIR CE 90/396/EEG:GAD
DIR CE 89/336/EEG:EMC
DIR73/23/EEG:LVD
DIR89/392/EEG:MD
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.
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.
Ambi-Rad Limited, Fens Pool Avenue, Brierley Hill, West Midlands DY5 1QA (United Kingdom)
Tel : [phone] Fax : [phone]

0502UDSAAMEN, Pag. 2/35
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 ............................................................................... 34
25. Troubleshooting ........................................................................................................ 34
26. Parts list .................................................................................................................... 35

0502UDSAAMEN, Pag. 3/35
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.
Warnings
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
installingorservicingthisequipment.
WARNING: Do not use this appliance if any part has been immersed in water.
Immediatelycalla qualifiedservicetechnician toinspectthe applianceand replace
any gas control that hes been immersed in water.
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.

0502UDSAAMEN, Pag. 4/35
3. Warranty
4. Uncrating
and
preparation
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.
These units must be installed in accordance with BS6230 or BS5440 as appropri-
ate plus all local building codes.
1. General Models UDSA 008 through 100 are design certified to the CE EN1020 standard for
usein industrial and commercial installations only.Allmodelsand 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 cor-
rect for the heater being installed. If the manual is incorrect for the heater, contact
thesupplier before beginning installation.
The instructions in this manual apply only tothe 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
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 instruc-
tions included in the option package.

0502UDSAAMEN, Pag. 5/35
5. Dimensions & Clearances (horizontal orientation=standard)
Topview
Frontview
Legend:
1. Combustion air inlet
2. Flue connection
3. External gas connection
4. Electrical connections
5. Service panel
Rear view
(all mod. except 035,043,050)
Side view
Rear view
( only mod. 035,043,050)
Figure 1
TypeABCDEFGHJ KLMNPQR
008 - 011 307 700 267 404 696 546 131 191 129 67 85 413 16 98 350 120
015 - 020 383 700 343 404 723 546 200 191 139 122 86 413 16 98 350 120
025 - 030 586 700 546 404 771 546 368 191 222 122 121 413 16 98 350 140
035 - 050 510 971 456 601 1129 897 371 195 126 166 121 623 33 149 600 140
055 - 064 663 971 609 601 1138 897 354 207 150 166 204 623 33 149 600 225
073 - 100 865 1040 812 651 1138 897 562 213 299 186 204 673 33 149 600 225
Table 1 : Dimensions (mm)

0502UDSAAMEN, Pag. 6/35
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
combustiblematerials.
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
Model 008 011 015 020 025 030 035 043 050 055 064 073 085 100
Ø flue/ air inlet
(mm) 80 80 80 80 100 100 100 100 100 130 130 130 130 130
Ø gas con-
nection 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"
Table 2 : Clearances (mm)
Model X Y Z (*) U V
8 -30 450 50 50 50 850
35 -100 450 100 100 100 850
Table 3 :
(*) : Heaters can be base mounted on suitable non combustible supports.

0502UDSAAMEN, Pag. 7/35
6. Technical data
Table 4 : Technical data
1) Gas Appliance Classifications for Approved Venting Methods based on CEN-report CR1749:1995.
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
TYPES 035-100
Type 035 043 050 055 064 073 085 100
Gas categories
Comb. Air and Flue, t
y
pe B instal.1
Comb. Air and Flue,type C instal. 1
Flue & combustionair connectioncollars mm 100 100 100 130 130 130 130 130
Heatinput(Hs) kW 42,2 50,8 58,6 66,0 77,7 88,0 102,7 117,3
Heatinput(Hi) kW 38,0 45,8 52,8 59,5 70,0 79,3 92,5 105,7
Heatoutput kW 34,9 42,1 48,6 54,7 64,4 73,0 85,1 97,0
Thermalefficiency % 92 92 92 92 92 92 92 92
Gas consumption
nat. gas G25 m3/h 4,02 4,85 5,59 6,30 7,41 8,39 9,79 11,18
prop. G31 kg/h 2,96 3,57 4,12 4,64 5,46 6,18 7,21 8,24
Gas connection size (not suppy line) 2
Temperaturerise K 29 28 282828282828
Airflow m3/h 3510 4535 5180 5830 6810 7770 9065 10360
Motor speed rpm 950 950 950 950 900 900 900 900
Recommended mounting height 3m
Horizontal air throw 4m 25 28 303033353639
Sound pressure 5dB(A) 55 54 555656585959
Electricalservice (protection class IP20)
Totalelectricalrating W 333 490 490 490 678 848 848 848
Weight(net) kg 88 99 99 112 118 143 158 168
230/240V 1N ~ 50Hz
3/4"
B22
C12, C32, C42, C52, C62,C82
3,5 4,0
II2H3+
TYPES 008 - 030
Type 008 011 015 020 025 030
Gas category
Comb. Air & Flue, t
y
pe B instal.1
Comb. Air & Flue, t
y
pe C instal.. 1
Flue & combustion air connection collars mm 80 80 80 80 100 100
Heat input (Hs) kW 8,8 13,2 17,6 22,0 30,8 35,2
Heat input (Hi) kW 7,9 11,9 15,9 19,8 27,8 31,7
Heatoutput kW 7,3 11,0 14,6 18,2 25,5 29,2
Thermal efficiency % 92 92 92 92 92 92
Gas consumption rate
nat. gas G20 m3/h 0,84 1,26 1,68 2,10 2,94 3,36
prop. G31 kg/h 0,62 0,93 1,24 1,55 2,16 2,47
Gas connection size (not supply line size) 2
Temperature rise K 32 32 32 32 32 32
Airflow m3/h 680 1020 1360 1700 2385 2725
Motor speed rpm 1390 1390 1450 1450 930 930
Recommanded mounting height 3m
Horizontal air throw 4 m 8 10 13 16 20 22
Sound pressure 5dB(A) 474647485051
Electricalservice (protection class IP20)
Total electrical rating W
Weight(net) kg 303338405660
II2H3+
C12,C32,C42,C52,C62,C82
B22
121 126 273
1/2"
230/240V 1N ~ 50Hz
2,5 3,0 3,5

0502UDSAAMEN, Pag. 8/35
7. Flue
requirements Model UDSA 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 oper-
ate safely and efficiently with either a horizontal or vertical flue system when in-
stalled 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.Aprop-
erly 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.
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.
Diameter & maximum
flue pipe lengths
IMPORTANT :
The flue must be installed in accordance with national and local regula-
tions. Failure to provide proper flueing could result in death, serious in-
jury 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.

0502UDSAAMEN, Pag. 9/35
Flues for power
vented installations
(type B appliances)
Figure 2 : Approved appliances type B
B22 - roof
Flue outlet Venteroutletattachment 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.
flue pipe 80 100 130
inlet pipe 80 100 130
flue pipe 9 9 9
inlet pipe 9 9 9
flue pipe 0.75 0.75 0.75
inlet pipe 0.75 0.75 0.75
flue pipe 1.5 1.5 1.5
inlet pipe 1.5 1.5 1.5
mmHeater socket & pipe dia
m
025,030,035,043
050, 055,064,073,085,100
Equivalent length of 90° elbow
Model UDSA 008,011,
015,020
m
m
Max. straight length (with wall/roof
terminal)
Equivalent length of 45° elbow
Table 5 : maximum flue system pipe lengths
• Use only one diameter of flue pipe on an installation.
• Minimum flue is 1m.
B22 - wall
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 accor-
dance with BS6230/BS5440 plus other relevant regulations & rules in force.
Single wall flue seamless aluminium or stainless steel pipes are required.All joints
mustbe sealed to prevent products of combustion from leaking into thebuilding. If
the flue passes through a combustible element of the building it must be enclosed
byasleeve ofnon-combustible materialandseparated fromthe sleevebya 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.
Single wall flue pipe exposed to cold air or run through unheated areas should 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 fluemust beconstructed fromnon-corrodible
material not less than 20 mm diameter. Copper or copper based alloys must not be
used for condensation drains.

0502UDSAAMEN, Pag. 10/35
Figure 3 :
Type B appliances : Combustion air and flue pipe sockets
1) Flue pipe outlet collar
2)Combustion air inlet opening
all mod., except. 035,043, 050 only mod. 035, 043 & 050
Air supply 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 in-
sulation, 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 ven-
tilation 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 ad-
equate 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).
WARNING:
When these air heaters are
installed in type B applica-
tions,designedtotakeairfor
combustionfromthespacein
which it is installed. Do not
restrict the combustion air
intake.