Powrmatic OUH 20 User guide

www.powmatic.co.uk [phone]
[email protected]
Doc Ref: M105 Issue 5.4 May 2018
Industrial & Commercial Heating Systems
OUH Suspended Oil Unit Heater
User, Installation
& Servicing Manual

page no. 2 of 32 OUH Range Users, Installation & Servicing Instructions Doc Ref M105 issue 5.4 May 2018.
Installer
Date:________________Signed: _____________________________________Installer
Commissioned
Date:________________Signed:_______________________Commissioning Engineer
Important: This certicate
must be kept with the appliance
Failure to provide a copy of the commissioning sheet invalidates the heater warranty
----------------------------------------------------
Powrmatic Ltd, Hort Bridge, Ilminster, Somerset, TA19 9PS
Tel: [phone] Fax: [phone]
Web: www.powrmatic.co.uk e-mail: [e-mail]
Certificate of Guarantee
Dear Customer
This is to certify that this heater is guaranteed for two years parts and one year labour from the date
of original commissioning. The heater must be commissioned within 4 weeks of installation.
To make a claim
In the rst instance you must contact your appliance supplier, or installer and provide:-
1. The appliance type and serial number.
2. The original commissioning documentation. As much detail as possible on the fault.
3. Your supplier, or installer, will then contact Powrmatic to make a guarantee claim on your behalf.
Conditions of Guarantee
1. The heater must have been installed by a competent recognised installer, and in
accordance with the manufacturer’s instructions, building regulations and local regulations.
2. The heater has been professionally commissioned, within 4 weeks of installation, and a copy of
the commissioning sheet returned to Powrmatic.
3. The heater has been maintained on a yearly basis by a competent servicing company.
4. The heater has been used in accordance with the manufacturer’s instructions.
5. The correct specication fuel has been used.
6. No unauthorised repairs of modications have been made. Powrmatic‘General Conditions of
Sales’have been observed.
7. Except for the obligation of Powrmatic Ltd to perform warranty repairs during the guarantee
period Powrmatic will not be liable in respect of any claim for direct or indirect consequential
losses, including loss of prots or increased cost arising from loss of use of the heater, or any
event arising there from.
Exclusions
Consumables such as gaskets, ignition electrodes, ame rectication electrodes, drive belts, fusible
links, control batteries, oil nozzles and oil line lter elements are all excluded from guarantee.

page no. 3 of 32
OUH Range Users, Installation & Servicing Instructions Doc Ref M105 issue 5.4 May 2018.
Dear Customer - thank you for choosing Powrmatic.
We appreciate you buying one of our high quality products and know that you have made the best
choice. By choosing Powrmatic, you are investing in UK manufacturing & its workforce. We pride
ourselves by manufacturing products that provide clean, comfortable and safe working environments
worldwide together with the personal & professional service and back-up you deserve. If you have
any questions or concerns regarding this product, please contact our Technical Support Team by
calling 01460 53535.
Title Section Contents Page
User Instructions 4
Pre Installation
1.1 Introduction 5
Duties 6
Dimensions 7
1.2 Technical data 8
1.3 General Requirements 10
Installation
2.1 Fitting the unit 13
2.2 General Identication of Items 15
2.3 Fitting the Flue 16
2.4 Electrical Cable Installation 17
2.5 Wiring Diagram 20
2.6 Commissioning and Testing 21
2.7 Servicing 23
Additional Documents
3.1 Fault Finding 25
3.2 List of Parts 26
3.3 Oil Conversion 28
Appendices
Information required for ecodesign (ErP) Directive 2009/125 30
Users, Installation and Servicing Instructions
CONTENTS

page no. 4 of 32 OUH Range Users, Installation & Servicing Instructions Doc Ref M105 issue 5.4 May 2018.
D) Description of Operation
Important: The heater must NOT be
controlled by switching ON and OFF the
main electrical supply to it.
1) Standard Units
The burner start up sequence will commence when the
controls e.g. Timeclock, room thermostat etc. call for heat.
The burner air fan will run and after a pre purge period the
burner will light.
Approximately 2/3 minutes after the burner lights the
heater fan will automatically start. When the external
controls are satised the burner will be turned o and
approximately 4/5 minutes later the heater fan will
automatically stop.
2) High/Low & Modulating Units
When the burners are alight, the heat output will be
controlled either to high re or low re or, in the case of
modulating units, to any point between high and low re;
depending on the requirements of the space being heated
and the external controls tted.
3) Summer / Winter Modes
Certain types of external controls will provide for two
modes of operation i.e.
Summer: The heater fan alone will run at the dictate of the
external controls to provide air movement.
Winter: The heater will operate normally.
4) Fan/Limit Stat
The fan and limit controls are mounted on the top of the air
heater.
4.1. Main Air Fan MAN / Auto
When the white button is pushed in the fan will run
continuously i.e not controlled by any external controls e.g.
Timeclock. When the white button is pulled out the fan
will start and stop automatically in conjunction with the
burner.
4.2. Limit Thermostat
This operates if high temperatures within the heater
are detected, the burners are turned o and a red
indicator light on the electrical box on top of the heater
is illuminated. The fault condition must be identied and
rectied and the thermostat manually reset.
When the unit has cooled push the reset switch on the
electrical box on top of the heater to reset the limit
thermostat interlock relay, the red indicator light will go
out and the unit is operational again.
If the heater has not been left operational
proceed as follows.
A) Checks before lighting the Air Heater
The following preliminary checks should be made before
lighting the heater(s)
a) Ensure that the ELECTRICAL supply to the heater is
switched OFF.
b) Check that all warm air delivery outlets are open.
c) Check that the thermostat is set at MAX.
d) Check that the clock control is set to an ON period.
e) Check that any other controls are calling for heat.
B) Lighting the Air Heater
1. Switch on the electrical supply at the isolator
2. If the Limit indicator light comes on press the reset
switch the electrical box on top of the heater.
3. The burner air fan will run and after a pre purge period
of approximately 30 seconds the ignition spark will be
generated and the oil valve opened. The main burner will
then start.
4. If the main burner fails to light the burner will go to
lockout and the lockout indicator / reset button on the
burner control box will be illuminated. To restart the
burner push the lockout reset button.
WARNING: If it is not possible to light the
heater after 2 or 3 attempts shut down the
heater and contact your installer/service
engineer.
C) To Shut Down the Air Heater
1) For Short Periods:
Turn the room thermostat to the OFF, or set to it’s lowest
setting.
2) For Long Periods:
Complete step 1 above.Wait approximately 4-5 minutes for
the main air fan of the heater to stop running and the turn
o the oil supplies and electric supplies to the heater.
User Instructions

page no. 5 of 32
OUH Range Users, Installation & Servicing Instructions Doc Ref M105 issue 5.4 May 2018.
Note: The limit thermostat(s) can only be reset
once the unit has cooled down.
Unless the cause of the fault condition is readily obvious,
for example a power cut whilst the heater was operating, a
service engineer should be contacted.
E) Maintenance
To maintain ecient, reliable and safe operation of the
heater it must serviced by a qualied person at least
annually and preferably at the end of the heating season.
F) IMPORTANT
Free access must be maintained to and around the heater
for servicing purposes and the air supply to the heater
must not be restricted in any way. Combustible materials
must not be stored adjacent to the heater.
All Powrmatic heaters use gas and electricity to power
them, they may also contain moving parts such as pulleys
and belts. It would be hazardous to tamper with or attempt
to service unless you are a competent person in the eld of
Oil and Electrical work.
If you have any safety questions reference the servicing
and installation of any of our heaters please do not hesitate
to contact our head oce for expert advice. Your safety is
paramount to us.
The Powrmatic OUH Range is a range of oil red forced
draught, closed ue, fanned circulation air heaters having
an output range of 20kW to 60kW .
The heaters are designed for suspension from suitable roof
points, or alternatively mounted on purpose designed
wall brackets, and are intended for heating commercial or
industrial premises.
The OUH-F has an axial type fan assembly tted at the
rear of each heater to circulate the air being heated across
the combined combustion chamber/ heat exchanger. A
centrifugal fan variation is presented in the OUH-C range
for ducted applications. The OUH-D range, in having no fan
tted, allows for ducted use where the air moving unit is
remote from the heater.
All units are red with a forced draught packaged oil
burner complete with all necessary safety controls. Each
1.1 Introduction
air heater must be connected to an individual closed ue
system only.
Fuel Types
All units are supplied as standard for use with 35sec fuel
and can be supplied for use with 28sec fuel as an option.
In accordance with guidelines from our burner supplier,
Riello, the burners tted to Powrmatic oil-red heaters are
suitable for fuels with a bio content of up to 10% only.
For fuels with a bio content of more than 10%, please
consult our Technical Department.
IMPORTANT
Service and Maintenance Engineers shall
ensure that replacement items are tted,
adjusted and set in accordance with the
data and detail set out in these instructions. If in doubt
consult Powrmatic Technical Department.

page no. 6 of 32 OUH Range Users, Installation & Servicing Instructions Doc Ref M105 issue 5.4 May 2018.
Notes:
Fuel Consumption and input figures based upon nett calorific values as follows:
- Class D light distillate fuel oil Nett CV 36.28 MJ/l
-
• Heaters have efficiency levels which meet with the minimum heater efficiency requirements of UK Part L Building Regulations
• Air handling data is assessed at room ambient conditions
• Throw figures provide the distance to the point where the terminal velocity degrades to 0.25m/s
• Noise levels are applicable to standard OUH models and are measured 5m from appliance in a typical installation situation.
• Motor kW, run and start amps apply to standard electrical supply as stated. For optional data contact sales office.
Model 20 30 45 60
Output
High Fire (max) kW 20 30 45 60
Low Fire (min) kW 16 21 34 45
Input (nett CV)
High Fire (max) kW 21.70 32.15 49.40 65.57
Low Fire (min) kW 16.40 24.20 33.70 45.17
Airflow
Volume m3/s 0.58 0.82 1.2 1.34
Throw OUH F m 8.5 16 25 34
Fan Static OUH C Pa 140 187 100 50
Electrics
Supply
Standard V/ph/Hz 230/1/50
Optional V/ph/Hz 415/3/50
OUH F
Start amp 2.26 1.14 1.70 4.20
Run amp 0.94 0.50 0.50 1.70
OUH C
Motor kW 0.55 0.55 1.1 1.5
Start amp 10.75 10.82 13.85 24.4
Run amp 4.30 4.33 5.54 9.76
Fuel Oil
Connection BSP/Rc ¼
Consumption
High Fire (max) kg/h 1.8 2.7 4.5 5.6
Low Fire (min) kg/h 1.5 2.2 3.1 4.3
Mounting Height OUH F
Min m 2.50 3.00
Max m 3.00 5.00
Overall
Dimensions
Height mm 880 1117 1117 1117
Width mm 555 780 780 780
Depth
OUH F mm 753 1106 1118 1140
OUH C mm 1038 1469 1469 1469
Installation Clearances
Top mm 1000
Side mm 500
Rear mm 400
Flue diameter mm ø 100 125
Combustion Air Spigot mm ø 150
Maximum Combustion Duct Length * m 120 100 81 21
Noise Level - OUH F models dB(A) 46 54 52 53
Nett Weight
OUH F kg 53 126 126 126
OUH C kg 91.5 142 142 142
Duties

page no. 7 of 32
OUH Range Users, Installation & Servicing Instructions Doc Ref M105 issue 5.4 May 2018.
OUH F 20 - Axial Fan
A
øD
B
CM
K
A
øD
B
CM
L
A L
B
CM
A K
FEF
B
CM
F
E
F
H
J
H
J
50
50
G
G
235 235
GE F
GE F
ØD
ØD
Model A B C D E F G K M
OUH F 20 668 555 610 100 465 101 549 85 196
OUH F 30/45/60 - Axial Fan
A
øD
B
CM
K
A
øD
B
CM
L
A L
B
CM
A K
FEF
B
CM
FEF
H
J
H
J
50
50
G
G
235 235
GEF
GE F
ØD
ØD
Model A B C D E F G K M
OUH F 30 975 780 847 125 490 276 490 171 196
OUH F 45 975 780 847 125 490 276 490 143 202
OUH F 60 975 780 847 125 490 276 490 173 202
OUH C 20 - Centrifugal Fan
A
øD
B
CM
K
A
øD
B
CM
L
AL
B
CM
A K
F
E
F
B
CM
FEF
H
J
H
J
50
50
G
G
235 235
GE F
GE F
ØD
ØD
Model A B C D E F G K M
OUH C 20 668 555 610 100 465 101 549 85 196
Dimensions

page no. 8 of 32 OUH Range Users, Installation & Servicing Instructions Doc Ref M105 issue 5.4 May 2018.
OUH C 30/45/60 - Centrifugal Fan
A
øD
B
CM
K
A
øD
B
CM
L
AL
B
CM
A K
F
E
F
B
CM
F
E
F
H
J
H
J
50
50
G
G
235 235
GE F
GEF
ØD
ØD
Model A B C D E F G K M
OUH C 30 975 780 847 125 490 276 490 131 196
OUH C 45 975 780 847 125 490 276 490 143 202
OUH C 60 975 780 847 125 490 276 490 165 202
MODEL Burner
Type
Nozzle Pump
Pressure
Head
Setting
Combustion
Air
Nominal
CO NOx Nett Flue Temp
Danfoss bar p.s.i. no. no. (mm) %ppm °C
OUH20 RG1 RKD 0.50Gal 60° S High Fire 12.41 180 0.3 1.0 12.56 84.3 193
Low re 8.27 120 0.3 0.2 12.46 74.6 135
OUH30 RG1 RKD 0.75Gal 60° S High Fire 12.07 175 1.3 2.2 12.55 63.2 171
Low re 8.96 130 1.3 0.5 12.58 65.4 150
OUH45 RG2D 1.10Gal 60° S High Fire 15.17 220 3.0 1.0 12.45 72.7 249
Low re 8.27 120 3.0 0.25 12.52 65.3 196
OUH60 RG2D 1.25Gal 45° S High Fire 15.17 220 4.0 412.73 59.8 300
Low re 8.27 120 4.0 0.7 12.16 52.8 232
Riello Burner Settings - 35sec Oil - Diesel - Net CV (H = 42.69MJ/kg)
Notes: CO values and Nett ue gas temperatures are given for guidance and measured values will depend on site conditions.
1.2 Technical Data

page no. 9 of 32
OUH Range Users, Installation & Servicing Instructions Doc Ref M105 issue 5.4 May 2018.
/F Models /CCF Models
MODEL
Start Amps
(A) Run Amps (A) Fuse Rating (A) Motor kW Start Amps (A) Run Amps (A) Fuse Rating (A)
OUH20 2.26 0.94 20.55 10.75 4.3 10
OUH30 1.14 0.5 20.55 10.82 4.33 10
OUH45 1.7 0.5 21.1 13.85 5.54 13
OUH60 4.2 1.7 31.5 24.4 9.76 13
Electrical Loadings - 1Pha
MODEL Air Volume External
Static
Pressure Throw Maximum
Duct
Resistance
Fan
Motor Noise Level Weight
m³/s m³/h Pa mPa kW dB(A) kg
OUH20 F0.70 2520 n/a 8.5 n/a 0.26 46 53.0
CCF 1.0 3600 275 n/a 140 0.42 TBA 91.5
OUH30 F0.82 2952 n/a 16 n/a 0.13 54 126
CCF 0.82 2952 305 n/a 187 1.1 TBA 142
OUH45 F1.19 4284 n/a 25 n/a 0.27 52 126
CCF 1.19 4284 275 n/a 100 1.1 TBA 142
OUH60 F1.94 6984 n/a 34 n/a 0.27 53 126
CCF 1.88 6768 384 n/a 50 1.1 TBA 142
Heater Specications
MODEL Burner
Type
Nozzle Pump
Pressure
Head
Setting
Combustion
Air
Nominal
CO NOx Nett Flue Temp
Danfoss bar p.s.i. no. no. (mm) %ppm °C
OUH20 RG1 RKD 0.55Gal 45° S High Fire 10.0 144 0.3 1.0 12.56 84.3 193
Low re 7.0 100 0.3 0.2 12.46 74.6 135
OUH30 RG1 RKD 0.85Gal 45° S High Fire 10.0 144 1.3 2.2 12.55 63.2 171
Low re 7.0 100 1.3 0.5 12.58 65.4 150
OUH45 RG2D 1.25Gal 45° S High Fire 10.0 144 3.0 1.0 12.45 72.7 249
Low re 7.0 100 3.0 0.25 12.52 65.3 196
OUH60 RG2D 1.50Gal 45° S High Fire 10.0 144 4.0 412.73 59.8 300
Low re 7.0 100 4.0 0.7 12.16 52.8 232
Notes: CO values and Nett ue gas temperatures are given for guidance and measured values will depend on site conditions.
Riello Burner Settings - 28sec Oil - Kerosene - Net CV (H = 47.00MJ/kg)

page no. 10 of 32 OUH Range Users, Installation & Servicing Instructions Doc Ref M105 issue 5.4 May 2018.
1.3.1. Related Documents
All OUH heaters comply with the following European
Directives:
Energy Related Product Directive: 2009/125/EC*
Electromagnetic Compatibility Directive: 2004/108/EC
Low Voltage Directive: 2006/95/EC
Machinery Directive: 2006/42/EC
Air heater(s) must be installed in accordance with BS5410
Part 2, BS799 Part3 & part 5 and BS5440 plus any relevant
requirements of local and national building codes. * where
appropriate
1.3.2 Location
The location chosen for the air heater must permit the
provision of a satisfactory ue system and an adequate air
supply. The location must also facilitate ease of servicing
and satisfactory air circulation around the heater.
The air heater must be installed strictly in accordance with
any re regulations or insurance company's requirements
appertaining to the area in which the heater is located,
particularly where special risks are involved such as areas
where petrol vehicles are housed, cellulose spraying areas,
and wood working departments etc.
The air heater must be installed either:
1) OUH 20 models;-
(a) Suspended by chains or straps of adequate strength to
safely carry the weight of the unit and ancillary equipment
2) OUH 30/45/60 models:-
(a) Suspended from ’drop rods’ via purpose designed M10
suspension xing points from the heater. Threaded drop
rods must have lock nuts tted that are tightened down
onto the 10mm xings in the heater.
(3) All OUH models:-
(a) in all cases, it is important that all supporting structures
have been assessed with regards to the relevant weight
loading.
(b) On specically designed cantilever brackets from a non-
combustible wall or
(c) On a level non-combustible surface which is capable of
adequately supporting the weight of the air heater and any
ancillary equipment.
The heater must not be installed in conditions for
which it is not specically designed e.g. highly corrosive
atmospheres, vitiated atmospheres, or where adverse wind
conditions may be experienced. Where the location of
the heater is such that it might suer external mechanical
damage e.g. from overhead cranes, fork lift trucks etc.
it must be suitably protected. Any ducting should be
kept as short and direct as possible having regard to the
distribution of the heated air and the max duct resistance
shown in section 1.3.10.
Any combustible material adjacent to the heater and
ue systems must be so placed as to ensure that its
temperature does not exceed 65°C (150°F).
1.3.3 Electrical Supply
Wiring external to the air heater must be installed in
accordance with the I.E.E. Regulations for Electrical
Installations and any local regulations which apply.
All standard heaters are supplied by 230V - 1ph, 50Hz. The
method of connection to the main electricity supply must:-
- facilitate the complete electrical isolation of the unit(s)
- be in a readily accessible position adjacent to the unit(s)
- serve only the unit(s)
- have a contact separation of at least 3mm in all poles. See
the accompanying wiring diagram for the heater electrical
connections
OUH units can also be supplied for 400V 3N, 50Hz.
1.3.4 Oil Supply
Construction and installation of service tanks and ttings
should be in accordance with:
(a) BS 5410 Part 2 Section 6
(b) BS 799 Part 5
(c) BS 1563
In addition the service tank installation must comply with
local regulations and by-laws and with the requirements of
insurance companies
Refer to the detail provided in the burner handbook
regarding oil pipe sizing. These must be generally in
accordance with BS799 Part 3 and BS5410 Part 2.
Particular attention is drawn to the following:
a) Pipe jointing compounds must be capable of
withstanding the solvent action of the fuel oil under
all operating temperatures and pressures. Jointing
compounds containing oil shall not be used. Hemp and
other brous materials shall not be used as packing for
screwed joints.
b) Soft solder copper tube ttings and galvanised pipes
and ttings must not be used.
c) Oil lines must be completely air-tight.
d) The pump suction must not exceed a maximum of 0.4
bar (30cm Hg). Beyond this limit gas may be released from
the oil.
1.3 General Requirements