BENSON VRC-3 20-3 Manuel
1704VRC3‐AMEN,p.1/35
1704VRC-3AMEN
Gas‐fired,balancedflueor
power‐ventedunitheater
VRC‐3
20‐3,30‐3,45‐3,60‐3
75‐3,100‐3
ThisappliancemeetsthefollowingECDirectives
DIR2009/142/EC:GAD
DIR2014/30/EC:EMC
DIR2014/35/EC:LVD
DIR2006/42/EC:MD
INSTALLATION–COMMISSIONING–SERVICING‐USER
INSTRUCTIONS
WARNING
Improper installation, adjustment, alteration, service, or maintenance can cause property
damage, injury, or death. All work must be carried out by appropriately qualified persons. The
manufacturer does not take any responsibility in the event of non-observance of the regulations
concerning the connection of the apparatus causing a dangerous operation of the apparatus, possibly
resulting in damage to the apparatus and/or environment in which the unit is installed.
Please read this document carefully before commencing installation commissioning and/or servicing.
Leave it with the user or attached to the appliance or gas service meter after installation.
Subject to modifications
1704VRC3-AMEN, p 2/35
TABLEOFCONTENTS
1.0INTRODUCTION
1.1 BasicInformation
1.2 Warranty
2.0TECHNICALDATA
2.1 Technicaldata
2.2Burnerpressure
2.3Blowercurves
2.4Bloweroptions
2.5Dimensions
3.0GENERALREQUIREMENTS
3.1 RelatedDocuments
3.2 HeaterLocation
3.3 CombustionAirInletPipeandFluePipe
3.4 AirSupply
3.5 AirDistributionSystem
3.6 ElectricalSupply
3.7 GasSupply
4.0INSTALLATION
4.1 UncratingandPreparation
4.2 SuspendingtheHeater
4.3 FittingtheCombustionAirInlet/FluePipe
System
4.4 GasConnection
4.5 ElectricalConnections
4.6 RoomThermostatSiting
5.0AIRDISTRIBUTION
6.0COMMISSIONINGANDTESTING
6.1 ElectricalCheck
6.2 GasConnection
6.3 SuspensionandSupport
6.4 LightingtheHeater
6.5 Heaterpipework
6.6 Adjustments
6.7 AirDistributionSystem
6.8 HeaterControls
6.9 HandingOver
7.0SERVICINGINSTRUCTIONS
8.0REMOVALANDREPLACEMENTOFPARTS
8.1 MainBurnerRemoval
8.2 MainBurnerInjectors
8.3 IgnitionSystem
8.4 OperatingGasValve
8.5 LimitControls
8.6 CombustionAirPressureSwitch
8.7CombustionAirFan
9.0FAULTFINDING
10.0PARTSLIST
11.0GASCONVERSION
12.0USERSINSTRUCTIONS
13.0HEALTH&SAFETYSTATEMENT
HAZARDINTENSITYLEVELS
DANGER
Failuretocomplywill resultinseverepersonalinjuryordeathand/or
propertydamage.
WARNING
Failuretocomplycould resultinseverepersonalinjuryordeathand/or
propertydamage.
CAUTION
Failuretocomplycouldresultinminorpersonalinjuryand/orproperty
damage.
WARNING: The electrical isolator should only be used in an emergency and should not be
used for closing down the main burner, as it switches off the fan prematurely and may
damage the heat exchanger, invalidating the warranty.
ATTENTION: This appliance is not intended for use by persons (including children) with reduced
sensory or mental capacities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
1704VRC3-AMEN, p 3/35
INTRODUCTION
1.1BasicInformation
TheinstructionsinthismanualapplytoModelVRC‐3gas‐fired/fan‐assistedwarmairheaters.These
modelshaveanaxialfanforairdelivery.Theseheatersaredesignedforoverheadsuspensionandare
suitableforindoorinstallationonlyinstalledatanoperationambienttemperaturebetween‐15°Cand
45°C.WheninstalledasatypeC12/C32andwheretheheightabovefloorlevelisgreaterthan1,8metres
measuredtotheundersideoftheappliancetheymaybeusedasagarageairheater.Thisappliancemust
beinstalledinaccordancewiththerulesinforce.
Beforeinstallation,checkthatthelocaldistributionconditions,natureofgasandpressureand
adjustmentoftheappliancearecompatible.Apermanentelectricitysupplyof230volts,50Hz,single
phaseisrequired.
Heatersareapprovedfor: TypeC12‐horizontalventforbalanced‐flueheaters;
TypeC32‐verticalventforbalanced‐flueheaters;
TypeB22‐verticalvent;
CategoryII2H3+forGBandIE
Whentheexternalcontrolcallsforheat,anelectroniccontrolbeginstheignitionsequencetoprovideforasafe
start.About30secondsafterthecallforheat,thefanwillbegincirculatingwarmair.Theelectroniccontrolwill
supervisetheflameduringtheentireheatingcycletoensuresafeoperation.Whentherequiredroom
temperatureisreached,themainburnerwillshutdownleavingthefanrunningtocooldowntheheat
exchanger.Afterapproximately45seconds,thefandelayrelaywillturnoffthefan.
1.2Warranty
Warrantyisvoidif:
TECHNICALDATA
2.1Specifications
Table1
20 30 45 60 75 100
Gas category
Comb. Air & Flue Type B (1)
Comb. Air & Flue Type C (1)
Connection colars mm 100 100 130 130 130 130
Heat inputs Hs kW 26,42 31,63 54,38 73,25 87,85 114,87
Heat inputs Hi kW 23,80 28,50 49,00 66,00 79,15 103,50
Heat output kW 21,82 25,99 44,64 60,92 73,13 94,50
Thermal efficiency % 91,70 91,20 91,10 92,30 92,39 91,30
Gas consumption G20 m3/h 2,52 3,02 5,19 6,98 8,38 11,19
Gas consumption G31 kg/h 1,86 2,22 3,82 5,15 6,17 8,24
Gas pipe connection (2) inch
ESP MIN Press Pa 50 50 50 100 150 100
ESP MAX Press Pa 200 300 200 200 350 300
Air flow measured m3/h 2248 2741 4023 5573 7079 8068
Temperature rise (3) K 28 28 32 32 30 34
Electrical service (protection IP20) 400V 3P
50Hz
Blower electrical rating W 660 1250 1410 1700 3070 3200
Total electrical rating W 770 1370 1530 1810 3180 3320
Blower Weight kg 14,5 20,5 27 26 41 45
Unit Weight kg 54 55,8 87 99 109 155
Total Weight kg 68,5 76,3 114 125 150 200
230/240V 1N 50Hz 230/240V 1N 50Hz
VRC-3 II2H3+
B22P
C12, C32, C42, C82
½" ¾"
a) VRC-3 heaters are installed in atmospheres containing flammable vapors or
atmospheres containing chlorinated or halogenated hydrocarbons or atmospheres
containing any silicone, aluminum oxide, etc., that adheres to spark ignition flame
sensing probes.
b) The installation is not in accordance with these instructions.
1
2
(1) Gas appliance Classifications for approved venting methods based on CEN report CR 1749:2001.
(2) There is a difference between the gas connection diameter and the diameter of the supply line. Always use the most adequate diameter of the supply line
to minimize the pressure drop through the gas pipes – if necessary, reduce the diameter of the supply line at the inlet of the unit.
(3)
Figure for isothermal conditions.
1704VRC3-AMEN, p 4/35
VRC 20-3 30-3 45-3 60-3 75-3 100-3
Quantity 5 6 10 8 10 12
mm 2,10 2,10 2,20 2,70 2,70 2,90
marking 210 210 220 270 270 290
Burner pressure (mbar) (1) 8,00 7,25 6,90 8,50 8,30 7,50
Injector size
VRC 20-3 30-3 45-3 60-3 75-3 100-3
Quantity 5 6 10 8 10 12
mm 1,15 1,15 1,15 1,45 1,45 1,50
marking 115 115 115 145 145 150
Butane 28,10 28,10 28,14 27,90 27,75 26,96
Propane 35,80 35,80 35,90 35,60 35,40 34,40
Injector size
Burner pressure (mbar) (1)
2.2Burnerpressure&injectorsize
Table2A:InjectorsizeandburnerpressureG20naturalgas(Inletpressure=20.0mbar)
Table2B:InjectorsizeandburnerpressureG30/G31butane/propane(InletpressuresG30=28mbar‐G31=37mbar)
1)withopenservicedoor
2.3Blowercurves
VRC 20-3
1704VRC3-AMEN, p 5/35
VRC 30-3
VRC 45-3
1704VRC3-AMEN, p 6/35
VRC 60-3
VRC 75-3
1704VRC3-AMEN, p 7/35
2.4 Blower options
2.4.1 Mixing cabinet
Bottomexit Rearexit
closed open
open closed
half half
Damperposition
VRC 100-3
VRC 20-3 with mix box
1704VRC3-AMEN, p 8/35
VRC 30-3 with mix box
VRC 45-3 with mix box
1704VRC3-AMEN, p 9/35
VRC 60-3 with mix box
VRC 75-3 with mix box
1704VRC3-AMEN, p 10/35
2.4.2 Mixing cabinet and filters
VRC 100-3 with mix box
VRC 20-3 with mix box and filters
Ce manuel convient aux modèles suivants
5
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