Powrmatic PVU Series User guide

Stamm International Corporation
PO Box 1929
Fort Lee, NJ 07024
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
Stamm International HQ
www.powrmatic.co.uk
www.powrmatic.co.uk
®
Powrmatic Limited
Hort Bridge, Ilminster
Somerset
TA19 9PS
tel: [phone]
fax: [phone]
e-mail: [email protected]
web: www.powrmatic.co.uk
Powrmatic Ireland
45 Broomhill Close
Tallaght
Dublin 24
tel: [phone]
fax: [phone]
e-mail: [email protected]
web: www.powrmatic.ie
Getting In Touch
Powrmatic pursues a policy of continues improvement in both design and performance of its products and therefore reserves the right to change, amend or
vary specifications without notice. Whilst the details contained herein are believed to be correct they do not form the basis of any contract and interested
parties should contact the Company to confirm whether any material alterations have been made since publication of this brochure.
EURO-AIR
QUALITY
ICOM
Energy Association
More information is available from our website by scanning the following QR code.
PVU & PVL
User, Installation & Servicing Manual
Issue 1.4 Oct 2019
Doc Ref: M302 Issue 1.4 Oct 2019
ErP COMPLIANT
SEPTEMBER 2018

www.powrmatic.co.uk
Important: This certificate
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: [email protected]
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 first 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 qualified 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 and qualified servicing
company.
4. The heater has been used in accordance with the manufacturer’s instructions.
5. The correct specification fuel has been used.
6. No unauthorised repairs of modifications 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 profits or increased cost arising from loss of use of the heater, or any
event arising there from.
Exclusions
Consumables such as gaskets, ignition electrodes, flame rectification electrodes, fusible links, control
batteries are all excluded from guarantee.
Certificate of Guarantee
®

Series PVU/PVL Page 2 M301 Oct19
CAUTION: FIRE OR EXPLOSION HAZARD
Maintain clearance to combustible constructions as further specified in this manual. Failure to do so
could result in a serious fire hazard. Heaters should not be located in hazardous atmospheres
containing flammable vapors or combustible dusts. Signs should be provided in storage areas
specifying maximum safe stacking height.
CAUTION: MECHANICAL HAZARD
This equipment expands and contracts with each operating cycle. The gas connection, suspension
hardware, and the installation itself must safely allow this movement. Failure to do so could result in
serious fire or explosion hazard.
CAUTION: FIRE OR EXPLOSIONS HAZARD
This heater is equipped with an automatic ignition device. Do not attempt to light the burner by hand.
Failure to comply could result in a serious fire and personal injury hazard.
CAUTION: MECHANICAL HAZARD
Do not use high pressure (above 60 mbar) to test the gas supply system with the burners connected.
Failure to do so could result in damage to the burner and its control components requiring replacement.
CAUTION: SERVICE LIFE RISK
Do not install equipment in atmosphere containing halogenated hydrocarbons or other corrosive
chemicals. Failure to do so may lead to premature equipment failure and invalidation of the warranty.
Additionally, it is recommended that the equipment be installed with a downward slope, away from the
burner. The rate of declination should be 6mm (¼") in height per 3m (10') in length to allow the start-up
condensation to drain.
Provide Manual to Owner upon completion of installation!
Read and thoroughly understand these Instructions before attempting any installation
INSTALLER
Retain this Manual & ensure available for service. Improper installation, adjustment, alteration, service,
or maintenance can cause injury, death or property damage.
Read the installation, operation, and service instructions thoroughly before installing or servicing this
equipment
OWNER
FOR YOUR SAFETY
Do not store or use flammable vapors and liquids in the vicinity of this or any other appliance.
If you smell gas: 1. Open windows
2. Don’t touch electrical switches
3. Extinguish any open flame
4. Immediately call your gas supplier
Improper installation, adjustment, alteration, service, or maintenance can cause property damage,
injury or death. Read the installation, operation, and service instructions thoroughly before installing or
servicing this equipment.
WARNING

Page 3
CONTENTS
INTRODUCTION...............................................................................................................................................................................4
CODESANDREGULATIONS..........................................................................................................................................................................4
GENERALSPECIFICATIONS...............................................................................................................................................................5
GASSUPPLY............................................................................................................................................................................................5
ELECTRICSUPPLY......................................................................................................................................................................................5
VENTINGANDCOMBUSTIONAIR.................................................................................................................................................................5
CONFIGURATIONS...........................................................................................................................................................................5
DIMENSIONALCHARTS....................................................................................................................................................................6
PACKAGINGCONTENTS–PVL.........................................................................................................................................................7
GENERALASSEMBLY–PVL.......................................................................................................................................................................7
PACKAGINGCONTENTS–PVU........................................................................................................................................................8
GENERALASSEMBLY–PVU.......................................................................................................................................................................8
GENERALASSEMBLY–BURNERBOXANDFAN................................................................................................................................................9
CLEARANCESTOCOMBUSTIBLES...................................................................................................................................................10
HANGERSINSTALLATIONANDHEATERSUSPENSION....................................................................................................................11
VENTING&COMBUSTIONAIR......................................................................................................................................................12
GENERALREQUIREMENTS........................................................................................................................................................................12
UN‐VENTEDOPERATION..........................................................................................................................................................................12
COMBUSTIONAIRSUPPLY........................................................................................................................................................................13
SUPPLYINGFRESHAIR.............................................................................................................................................................................14
FLUEGASEXHAUST................................................................................................................................................................................14
HERRINGBONEMANIFOLDSYSTEM...............................................................................................................................................15
GASSUPPLY..................................................................................................................................................................................16
GENERALREQUIREMENTS........................................................................................................................................................................16
ELECTRICALWIRING......................................................................................................................................................................17
GENERALREQUIREMENTS........................................................................................................................................................................17
INTERNALWIRINGDIAGRAM....................................................................................................................................................................17
AIRPRESSURESWITCH............................................................................................................................................................................17
BURNEROPERATION.....................................................................................................................................................................18
STARTINGSEQUENCEOFOPERATION...........................................................................................................................................................18
MAINTENANCE..............................................................................................................................................................................18
ASSEMBLYINSTRUCTIONSSEQUENCE–PVL.................................................................................................................................19
ASSEMBLYINSTRUCTIONSSEQUENCE–PVU................................................................................................................................24
SIDEREFLECTORS..........................................................................................................................................................................31
COMMISSIONING..........................................................................................................................................................................32
TROUBLESHOOTING......................................................................................................................................................................33
CONVERSIONINSTRUCTIONS........................................................................................................................................................35
REPLACEMENTPARTS...................................................................................................................................................................36
REPLACINGPARTS.........................................................................................................................................................................37
TECHNICALDETAILS......................................................................................................................................................................40
TECHNICALDETAILS–ERPDIRECTIVE............................................................................................................................................41
Series PVU/PVL M301 Oct19

Page 4
Important
Themanufacturer’sinstructions,thelayoutdrawing,nationalandlocalcodesandordinances,andallapplicable
standardswhichapplytogaspipingandelectricalwiringcomprisethebasicinformationneededtocompletethe
installation.Thesecriteriamustbethoroughlyunderstoodbeforeproceeding.
Onlypersonnelwhohavebeentrainedandunderstandallapplicablecodesshouldundertaketheinstallation.
INTRODUCTION
Superior Radiant Products is a company in the infrared heating industry founded on the principles of product quality
and customer commitment.
Quality commitments are evidenced by superior design, a regard for design detail and an upgrade of materials
wherever justifiable.
Customer commitment is apparent through our ready responses to market demands and a never ending training
and service support program for and through our distributor network.
Superior Radiant offers more than 20 years of infrared expertise in a cost effective unitary heater design as
culmination of that commitment.
Series PV model, the range of Superior Radiant Products (SRP®) from Powrmatic, is a low intensity infrared two
stage tube heater with high radiant and thermal efficiency.
Codes and Regulations
Series PV radiant tube heater is designed and manufactured according to EN 416 “Single burner gas-fired
overhead radiant tube heaters for non-domestic use".
This appliance must be installed in accordance with the rules in force. It shall be used in a space ventilated in
accordance with the requirements of EN 13410 Gas-fired overhead radiant heaters - Ventilation requirements for
non-domestic premises. Consult the instructions before installation and use of this appliance.
Every heater is subjected to a function test prior to leaving the factory and is pre-set for the relevant type of gas.
The following regulations and directives are to be considered for the installation and operation of radiant heating
systems.
EN 60335-1, Household and similar electrical appliances - Safety - Part 1: General requirements
EN 60335-2-102: Household and similar electrical appliances - Safety - Part 2-102: Particular requirements for gas,
oil and solid-fuel burning appliances having electrical connections.
EN 12831, Heating systems in Buildings.
This heater is NOT approved for use in residential dwellings.
Series PVU/PVL M301 Oct19

Page 5
GENERAL SPECIFICATIONS
Gas Supply
Supply Pressure Minimum Nominal Maximum
Natural Gas: 17.5 mbar 20 mbar 25 mbar
Propane: 28 mbar
37 mbar 50 mbar
Manifold Pressure Nominal Heat Input Partial Heat Input
Natural Gas: 12.5 mbar 8 mbar
Propane: 25 mbar 15.5 mbar
Inlet Connection
1/2” female BSP
Electric Supply
Alternating current: Voltage 230 V, 50 Hz with L, N and PE
Power consumption: 70 W, 0.3A (Herringbone 15 W)
Venting and Combustion Air
Flue Diameter: 100 mm
Air inlet connection: 100 mm
CONFIGURATIONS
Model PV L Model PV U
Natural gas 20 30 40 50 20 30 40 50
Heat Input kW gross 22 30.5 41 53 22 30.5 41 53
Partial Heat Input kW gross 17.5 25 32.5 41 17.5 25 32.5 41
Propane 20 30 40 20 30 40
Heat Input kW gross 22 30 38 22 30 38
Partial Heat Input kW gross 17 23.5 29.5 17 23.5 29.5
Series PVU/PVL M301 Oct19

Page 6
DIMENSIONAL CHARTS
Figure 1: Overall Dimensional Information
Model PV L Units 20LS 20/30 40 50
Dimensions
A mm 7975 9850 12900 19000
B mm 400 400 400 400
C mm 250 250 250 250
Weight kg 55 64 80 112
Model PV U Units 20US 20/30 40 50
Dimensions
A mm 3875 5400 6950 10000
B mm 900 900 900 900
C mm 250 250 250 250
Weight kg 52 66 82 114
B
A
C
B
A
C
Series PVU/PVL M301 Oct19

Page 7
PACKAGING CONTENTS – PV L
Get to know your heater parts (list referencing Figures 2 & 4).
Figure 2: General Overview PV L
General Assembly – PV L
6
5
1
3
4
2
7
9
8
10
11
Series PVU/PVL M301 Oct19
No.PNDescription
Quantities
20LS20304050
1CR00222222
2ACR00123346
2BCR00310000
3CR00344457
4CH21811111
5CH22311111
6CR024555713
7UT00211111
8ACT00112235
8BCT07310000
9CR16033346
10CT00611000
11CT00711110
12CE331
EndCap
Reflector,3150mm(124”)
Reflector,1575mm(62”)
Hanger
JBolt,M8
Nut,M8
ReflectorBracketAssembly
FlangedTube,3050mm(120”)
Tube,3050mm(120”)
Tube,1525mm(60”)
Coupling
Turbulator,SS,1830mm(6’)
Turbulator,Alz.,1830mm(6’)w/Tab
ConnectorKit(notshown)11111

Page 8
PACKAGING CONTENTS – PV U
Get to know your heater parts (list referencing Figures 3 & 4).
Figure 3: General Overview PV U
General Assembly – PV U
10
5
6
1
7
2
8
4
9
3
11
Series PVU/PVL M301 Oct19
No.PNDescription
Quantities
20LS20304050
1CR00244444
2ACR00122246
2BCR03100200
3CR15833334
4CR02411123
5UT00211111
6ACT00111135
6BCT07300200
7CT12011111
8CR16055556
9CT00711000
10ACT00601110
10BCT16110000
11CT165
EndCap
Reflector,3150mm(124”)
Reflector,1575mm(62”)
HangerKit
ReflectorBracketAssembly
FlangedTube,3050mm(120”)
Tube,3050mm(120”)
Tube,1525mm(60”)
U‐Tube
Coupling
Turbulator,Alz.,1830mm(6’)w/Tab
Turbulator,SS,1830mm(6’)
Turbulator,Alz.,1220mm(4’)
Turbulator,SS,610mm2’w/Tab10000

Page 9
General Assembly – Burner Box and Fan
No.PNDescription
Quantities
20304050
1CH223Nut,M8Hex4444
2CH020SpringWasher44  44
3CH001Gasket,Flange 1111
4‐ChokePlate,BurnerUS250US250US250US250
5CH224Nut,M6Hex4444
6US247Cage,Inlet1111
7‐ChokePlate,InletUS259US251US252US266
8CH253Gasket1111
9CE329FanAssembly1111
10CH252Gasket,FanInlet1111
11CE302FanInletConnector1111
12US261Screen,FanOutlet(Optional)1111
Figure 4: Burner Box and Fan
1
3
5
7
6
8
9
10
11
12
2
4
Series PVU/PVL M301 Oct19

Page 10
CLEARANCES TO COMBUSTIBLES
A general clearance of 500 mm (20”) in every direction is recommended for servicing. In addition to this, it is very
important to observe the minimum clearances to combustibles at all times to avoid any possibility of property
damage or personal injury.
WARNING
Maximum allowable stacking height in storage areas should be identified with signs or appropriate markings
adjacent to the thermostat or in a conspicuous location.
Clearances to combustibles DO NOT indicate acceptable distances from PVC paneling. Refer to panel
manufacturers recommendations.
Combustible materials are considered to be wood, compressed paper, plant fibres, plastics, Plexiglas, or other
materials capable of being ignited and burned. Such materials shall be considered combustible even though flame-
proofed, fire-retardant treated, or plastered.
Adequate clearance to sprinkler heads must be maintained.
The stated clearance to combustibles represents a surface temperature of 50°C above room temperature.
It is the installer’s responsibility to ensure that adjacent materials are protected from deterioration.
Below Side
Above
Reflector End Front Rear
A B C D E F
PV L 20LS, 20, 30, 40 1880 mm 910 mm 100 mm 500 mm 1630 mm 100 mm
PV U 20US, 20, 30, 40 1930 mm 940 mm 100 mm 500 mm 1630 mm 100 mm
PV L 50 2030 mm 1120 mm 150 mm 500 mm 1830 mm 100 mm
PV U 50 2080 mm 1140 mm 150 mm 500 mm 1830 mm 100 mm
Table 1: Minimum clearances to combustibles
Figure 5: Clearances to Combustibles
A
C
D D
B
A
B
B
A
B
A
F
E
C
E
F
A
Series PVU/PVL M301 Oct19

Page 11
HANGERS INSTALLATION AND HEATER SUSPENSION
The heater should be installed in accordance with the relevant provisions of National standards and Codes
of Practice in the destination country.
Suspension mechanism must allow for lateral tubing expansion. A minimum 300 mm (12") length welded
link chain with a working load limit of at least 90 kg (200 lbs) is recommended (refer to Figure 5 for more
details). Manufacturer recommends and makes available “quick links” for connecting chain. If any
open ended “S” hooks and turnbuckles are used, the open ends must be closed to avoid
unhooking chain with inadvertent contact.
Locate hanging chain at predetermined suspension points in the structure.
Figure 7: Heater Suspension
NOTE:ENSURETHATTHEMOUNTINGHEIGHTALLOWSADOWNWARDSLOPEOF6mmIN3m,AWAYFROMTHEBURNER.
NOTE:BOTHMETHODSAREACCEPTABLE.ENSURETHATTHEHANGINGBRACKETSARELEVELED
VERTICALSUSPENSIONCHAINS
Figure 6: Suspension Mechanism
Series PVU/PVL M301 Oct19

Page 12
VENTING & COMBUSTION AIR
General Requirements
The heater should be installed in accordance with the relevant provisions of National Standards and Codes of
Practice in the destination country.
Heaters can be operated according to the following appliance type:
Type A2. Gas appliance without flue gas system. The combustion air is taken from the installation space.
Type B22. Gas appliance with flue gas system, taking the combustion air from the installation space.
Type C62. Gas appliance with flue gas system and outside (ducted) combustion air supply. Use a separated
approved and marketed system for supply of combustion air and discharge of the combustion products.
Un-Vented Operation
The installation room should have a volume of at least 10m³/kw of installed nominal heat input of the radiant heater.
The ventilation requirements and calculation methods for unvented appliances are set out in the European
Standards EN 13410:2001 and must be applied. The following is guidance to the standard:
Ventilation may be achieved by any of the three following different means:
a) Thermal evacuation of the products of combustion/air mixture;
b) Mechanical evacuation of the products of combustion/air mixture;
c) Natural air change.
Ventilation by Thermal Evacuation
a) The air of the room mixed with the products of combustion shall be evacuated above the radiant heaters, if
possible near the ridge by means of exhaust air openings.
b) Shut down devices and restrictors at exhaust air openings are permissible if an automatic safety device
ensures opening of the devices/restrictors for the safe operation of the appliances. Otherwise exhaust air
openings shall not be restricted or closed.
c) The horizontal distance between a radiant heater and an exhaust air opening shall not exceed six times the
exhaust air opening height (measured to the center of the opening) for wall openings and three times the
exhaust air opening height (measured to the center of the opening) for roof openings.
d) Ventilation by thermal evacuation is sufficient if 10 m³/h of exhaust air per kW of operating heat input are
ventilated out of the installation room.
Ventilation by Mechanical Evacuation
a) The products of combustion mixed with room air shall be evacuated from above the radiant heaters using fans.
b) It shall only be possible to operate the radiant heaters when the exhaust air evacuation is assured.
c) The number and arrangement of the fans depend on radiant heater arrangement and room geometry.
The horizontal distance between a radiant heater and a fan shall not exceed six times the fan mounting height
(measured to the axis of the fan) for wall mounted fans and three times the fan mounting height (measured to
the axis of the fan) for roof mounted fans.
The fans shall be installed above the radiant heaters, if possible near the ridge.
d) Ventilation by mechanical evacuation is sufficient if 10 m³/h of exhaust air per kW of operating heat input are
ventilated out of the installation room.
e) When applicable, the exhaust air flow rate shall take into account any exhaust air flow rate required for other
purposes. The fan capacity is then computed based on the higher of these air flow rates.
Ventilation by Natural Air Change
Gas-fired radiant heaters may be operated without any special exhaust system if the exhaust gases are discharged
to the outside atmosphere by a sufficient natural air change in the installation room.
No provision for thermal or mechanical ventilation is required in the following particular cases:
Buildings with natural air change greater than 1.5 volumes per hour
Buildings with a density of operating heat input not greater than 5W/m³
Series PVU/PVL M301 Oct19

Page 13
Air Supply
Air supply openings are required to admit air and shall be located below the radiant heaters.
Exceptions are possible if the air supply openings are between the individual heaters and their location has been
planned after proper evaluation of the air flow.
The sum of the unobstructed cross-sections of all air supply openings shall not be smaller than the sum of the
unobstructed cross-sections of all exhaust openings.
Slits and gaps of fixed cross-section can also be used as air supply openings.
Where the air supply openings can be closed, it shall only be possible to operate the radiant heaters when they are
open.
Vented operation
In buildings having an air change rate of less than 0.5 per hour, additional natural or mechanical ventilation is
required.
Natural ventilation: Ventilation openings with a free area of at least 2 cm² per kilowatt of rated heat input shall be
provided.
Mechanical ventilation: Sufficient ventilation air shall be provided to ensure that the building air change rate is at
least 0.5 per hour.
Note: When flued horizontally, the flue pipe must be arranged to provide a continuous rise from the appliance of
6mm per 1m length.
Note: The flue gas temperature downstream of the heater is at maximum 250 °C.
IMPORTANT
PV 20LS, 20 PV 30, 40, 50
Maximum total exhaust vent length allowed for ø 100 mm 5 m 10 m
Maximum total fresh air inlet duct length allowed for ø 100 mm 5 m 8 m
Note: Subtract 1.5 m of allowable length for each 90⁰ bend. Maximum of two 90⁰ bends allowed.
-Install a minimum 500 mm straight length of duct for air intake or vent before any Tee or elbow.
Combustion Air Supply
An outside combustion air supply is strongly recommended if the building space encloses a negative pressure
due to exhaust etc. or if the building contains materials which would expose the heater to halogenated
hydrocarbon atmospheres.
The outside air terminal should be located at an elevation equal to or below the vent terminal elevation to
prevent back-venting of flue gases into the burner compartment.
If installing both an intake air and vent terminal through a sidewall there must be a minimum of 1 m separation,
measured on vertical center line, between the intake air and vent terminations.
Series PVU/PVL M301 Oct19

Page 14
Supplying Fresh Air
Step 1
Remove the four nuts securing the Inlet Cage to the
Burner Box. Do not remove the Gasket and Choke
Plate.
Step 2
Secure the Inlet Connector using the four M6 nuts.
Flue Gas Exhaust
Step 1
Remove the Screen from the Fan outlet. Then, secure
the Inlet Connector and Gasket using four M6 fasteners
(not supplied) as shown.
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Page 15
HERRINGBONE MANIFOLD SYSTEM
The flue gas vacuum fan should position at the lowest point of the flue gas system. A condensate trap assembly
must be provided at the end of the manifold system before the flue gas vacuum fan.
To ensure that any condensation formed in the manifold is not trapped or allowed to drain back into the heater the
manifold system should be arranged to fall slightly in the direction of the flue gas vacuum fan, 2 to 3 millimeters per
meter.
The exhaust flue should be adequately supported from the building structure and installed in accordance with the
National Standards and Codes of Practice in the destination country.
Note: The flue gas temperature downstream of the heater is at maximum 280 °C. Only materials which are suitable
for such temperatures may be used for mounting the flue gas ducting.
Cold Balancing the System Vacuum
Turn ON the electrical supply but NOT the gas supply.
Allow the system to run without burners operating. The flue gas fan is running.
Start setting procedure at the heater farthest away from the fan.
With a manometer, check the vacuum at the test point upstream of the damper installed in the tailpipe.
Adjust the damper to obtain the vacuum readings according to table below.
Mark the damper positions for future reference.
Proceed similarly until each individual branch in the system is balanced / adjusted.
Shut down the System.
Final Balancing the System Vacuum
Turn ON the gas supply.
Turn up the thermostat to start the system and let it run (with burners operating) for at least 30 minutes.
Start setting procedure at the heater farthest away from the fan.
With a manometer check the vacuum at the test point.
Adjust the dampers again (Caution: dampers are now hot adjust with caution) as required to obtain the vacuum
readings of the settings in table below. The heater should now be firing at the appropriate rate.
Proceed similarly until each individual heater in the system is balanced / re-adjusted.
Mark the damper position and lock in place when the system has been balanced.
Turn the thermostat down again to shut off the system.
Series PVU/PVL M301 Oct19
Model PV L Model PV U
Natural Gas 20 20S 30 40 50 20 20S 30 40 50
Cold mbar 3.38 3.35 3.04 3.23 3.26 3.4 3.22 3.06 3.48 3.78
Hot mbar 2.31 2.07 1.74 1.84 1.94 2.31 2.00 1.82 1.94 2.04
Propane 20 20S 30 40 - 20 20S 30 40 -
Cold mbar 3.38 3.35 2.99 3.48 - 3.42 3.22 3.01 3.48 -
Hot mbar 2.31 2.07 1.77 1.92 - 2.36 2.00 1.84 1.99 -
Table 2: Minimum vacuum pressure downstream the heater

Page 16
GAS SUPPLY
General Requirements
Before connecting gas to the heater, check the supply gas and supply pressure: match the information on
the rating plate of the heater.
The gas meter and service must be sufficiently large to supply gas to the connected building gas load
including the heating equipment and any other gas fired equipment. Additionally, the gas distribution
piping must be designed according to National standards and Codes of Practice in the destination country.
Generally, (low pressure) systems designed with a maximum 1.25 mbar (½" W.C.) total pressure drop
meet this requirement.
Gas supply pipe sizing must be in accordance with the National standards and Codes of Practice in the
destination country. Minimum size to be 12.7 mm (½") bore.
To accommodate the dynamic thermal expansion of radiant tube heaters, a flexible gas connection has to
be realized. The flexible connection is achieved by the use of flexible gas hoses.
Flexible gas hoses used for the installation of radiant tube heaters shall be of stainless steel construction.
The minimum diameter of the hose shall not be less than the diameter of the inlet connection. The
minimum length of the flexible hose shall not be less than 0.5 metres. The maximum length of the flexible
hose including the fittings shall not be greater than 2 metres.
Flexible gas hoses shall meet the requirements of EN 14800:2007. National standards and Codes of
Practice in the destination country must be adhered to.
Flexible gas connectors of approved type must be installed as shown in Figure 10, in one plane, and without
sharp bends, kinks, or twists. A smooth loop of approximately 12” (300 mm) in diameter is best. Failure to install
the gas connection in the approved manner will result in a hazardous and potentially deadly situation due to the
movement of the heat exchanger and burner in the normal course of operation
PV 20, 30, 40 12.7mm ( ½”) Flexible gas connectors PR-CG012
PV 50 19.1 mm (¾”) Flexible gas connectors PR-CG024
Figure 8: Flexible Gas Connections
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Page 17
ELECTRICAL WIRING
General Requirements
The electrical wiring to this heater must be installed in accordance with National Standards and Codes of Practice
in the destination country.
This appliance must be earthed.
Electrical supply 230V, 50Hz
Power consumption 70W (Herringbone 15W)
Current rating 0.3 A
Internal Wiring Diagram
This is a two stage heater.
Figure 9: Wiring Diagram
Air Pressure Switch
The heater is equipped with an air pressure switch located in the burner box. This device monitors the air pressure
produced by the fan. In the event that the exhaust venting or the intake pipe becomes blocked or sufficiently
restricted, the air pressure switch (normally open) will shut down the heater.
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Page 18
BURNER OPERATION
Starting sequence of operation
Turn the thermostat on. When the thermostat calls for heat, the fan motor will energize.
After fan establishes the flow, the air-proving switch closes and activates the ignition sequence.
The ignition module, after a pre-purge period of approximately 45 seconds, energizes the igniter.
The gas valve opens after sparking starts.
If a flame is detected, the ignition sensing rod "reads" a rectification signal and the gas valve
remains open. The sparking stops when the flame signal is established.
If no flame is detected, the gas valve closes and a 30 seconds inter-purge period begins.
After the inter-purge, the module repeats the trial for ignition period.
If no flame is detected after three trials the module will lockout.
Reset is accomplished by removing power from the module for at least 5 seconds.
During normal operation, the red pilot lamp is ON.
The yellow lamp indicates that the heater is running at full load. At a partial load, the yellow lamp is OFF.
To shut down the heater, switch off the electricity supply to the appliance. To shut down the heater for
long periods of time, switch off the electricity supply and close the gas valve.
MAINTENANCE
For best performance, certain minimal maintenance procedures should be performed before each heating season.
Installation environment and best practices should be considered in determining frequency.
Before performing any services or maintenance, shut off gas and electrical supply to heater.
Check condition of fan. Dirt and dust may be blown or vacuumed from the fan.
Check condition of burner. Remove any foreign objects or debris from inside the burner box or burner cup.
Inspect the igniter. Replace igniter if there is excessive wear or erosion, breakage or other defects.
Be sure the burner observation window is clean and free of cracks or holes. Clean or replace as necessary.
Check the flue pipe for soot or dirt and reattach to the heater after cleaning as necessary.
The reflector sections may be cleaned by wiping with a damp cloth.
A service agency qualified to adjust and repair infrared heaters should be engaged for service other than
routine maintenance.
Be sure vent terminal and fresh air inlet are free from obstructions. If either pipe is restricted, the safety air
switch will not operate properly, and the heater could fail to operate. Inspect any joints to make sure they are
completely sealed.
Check the inside of the radiant tubes visually with a flashlight. If carbon or scale are present, scrape or
otherwise remove deposits (a wire brush works well).
Check soundness of the heater suspension system.
Re-assemble the appliance in reverse order and commission in accordance with instructions.
Series PVU/PVL M301 Oct19

Page 19
ASSEMBLY INSTRUCTIONS SEQUENCE – PV L
Step 1
The number of Hangers depends on the heater
configuration; four to seven Hangers and Chains are
required. All the chains must be aligned.
Shortest chain length = 600 mm (Heaters 20 - 40 kW)
Shortest chain length = 1000 mm (Heaters 50 kW)
Step 2
Mount the Flanged Tube (PR-UT002) on the Hanger
(PR-CR003) and ensure that the Tube’s weld seam
faces downwards.
Fasten Tube to Hanger using J-bolt and nut (required
only for the first hanger, next to the flange).
Note: This applies also to inclined heaters.
Step 3
The distance between the flange and the Hanger
should be 150mm (6”).
Slide Coupling on Tube (see next page for detail).
Step 4
Ensure that both Tubes hit the middle point of the
Coupling to minimize gap between Tubes, as pictured.
Step 5
Orient the Couplings to the 10 or 2 o’clock positions for
nut accessibility. This also prevents interference with
the reflector.
Torque nuts to 20 – 35Nm
J-Bolt and Nut
(First hanger only)
Install with weld
seam down!
150mm (6”)
Push tubes as
deep as possible
to minimize gap.
3050mm
(120’)
2800mm
(110”) 3050mm
(120’)
OR
Series PVU/PVL M301 Oct19