Powrmatic NVx15CCF User, Installation & Servicing Manual
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Powrmatic NVx15CCF User, Installation & Servicing Manual

Suspended gas unit heater, industrial & commercial heating systems.
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Issue 6.4 Aug 2017
NVx Suspended Gas Unit Heater
Industrial & Commercial Heating Systems
User, Installation
& Servicing Manual
+ 4 4 ( 0 ) 1 4 6 0 5 3 5 3 5
i n f o @ p o w r m a t i c . c o . u k
w w w . p o w m a t i c . c o . u k

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Summary of Contents for Powrmatic NVx15CCF

  • Page 1 Issue 6.4 Aug 2017 NVx Suspended Gas Unit Heater Industrial & Commercial Heating Systems User, Installation & Servicing Manual + 4 4 ( 0 ) 1 4 6 0 5 3 5 3 5 i n f o @ p o w r m a t i c . c o . u k w w w .

  • Page 2: Nvx Range Users, Installation & Servicing Instructions Issue 6.4 Aug

    Except for the obligation of Powrmatic Ltd to perform warranty repairs during the guarantee period Powrmatic will not be liable in repect 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.

  • Page 3: Table Of Contents

    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 &...

  • Page 4: User Instructions

    User Instructions D) Description of Operation If the heater has not been left operational proceed as follows. Important: The heater must NOT be controlled by switching ON and OFF the main electrical supply to it. A) Checks before lighting the Air Heater 1) Standard Units The following preliminary checks should be made before The ignition sequence commences each time the external...

  • Page 5: Introduction

    Service and Maintenance Engineers shall and draw in air for combustion. The air heater must be ensure that replacement items are fitted, connected to a flue system that is approved by Powrmatic adjusted and set in accordance with the Ltd.

  • Page 6: Duties

    Duties Model SF90 SF120 SF140 Output Input (nett CV) 16.4 21.9 27.3 32.9 43.5 54.2 65.5 80.6 97.4 128.5 148.9 NVx F / C / V 0.42 0.56 0.78 1.06 1.18 1.51 1.86 2.56 2.81 3.56 3.75 2.34 3.12 3.64 Airflow Volume 0.42...

  • Page 7: Dimensions

    Dimensions NVx F - Axial Fan Crossflow Units NVx 40 F NVx SF90 ØD GAS ENTRY POINT ELEC ENTRY FRONT VIEW REAR VIEW R/H SIDE VIEW SUSPENSION POINTS M10 CTRS CTRS CTRS CTRS J CTRS J CTRS J CTRS PLAN FOR NVx F 15-75 PLAN FOR NVx F 90-140 Model SF90...
  • Page 8 NVx Duo - Axial Fan Bi-Directional Units NVx SF90 Duo FRONT VIEW R/H SIDE VIEW SUSPENSION POINTS M10 CTRS PLAN CTRS GAS ENTRY POINT REAR VIEW ELEC ENTRY J CTRS J CTRS 2-WAY Model SF90 SF120 SF140 1950 1950 1950 1140 DØ...
  • Page 9 NVx V - Axial Fan Downflow Units NVx 60 V NVx 60 V ØD B+70mm 1325 R/H SIDE VIEW FRONT REAR DROP ROD SUSPENSION POINTS M10 J CTRS J CTRS J CTRS J CTRS J CTRS ELEC ENTRY ELEC ENTRY C+30mm GAS ENTRY POINT GAS ENTRY POINT...
  • Page 10 NVx C - Centrifugal Close Coupled Fan Units NVx 50 C NVx 50 C (Rear) (Front) ØD GAS ENTRY POINT ELEC ENTRY FRONT VIEW REAR VIEW R/H SIDE VIEW SUSPENSION POINTS M10 CTRS CTRS PLAN CTRS CTRS J CTRS J CTRS J CTRS PLAN FOR NVx C 90-140 PLAN FOR NVx F 15-75...
  • Page 11 NVx D - Ducted Heat Module (No Fan) NVx 50 D (Rear) NVx 50 D (Front) ØD GAS ENTRY POINT FRONT VIEW REAR VIEW ELEC ENTRY R/H SIDE VIEW SUSPENSION POINTS M10 CTRS CTRS CTRS CTRS J CTRS J CTRS J CTRS PLAN FOR NVx D 90-140 PLAN FOR NVx D 15-75...

  • Page 12: Accessories

    Accessories 30° Downflow Head (NVx F Models Only) Model Part Number NVx 15-20-25 NVX01530DH NVx 30-40 NVX03030DH NVx 50 NVX05030DH NVx 60 NVX06030DH NVx 75 NVX07530DH NVx SF90 NVXSF09030DH 1566 NVx SF120 NVXSF12030DH 1566 NVx SF140 NVXSF14030DH 1096 1566 90° Downflow Head - (NVx F Models Only) Model Part Number...
  • Page 13 Fan Plenum Box - (NVx C Models Only) Model Part Number NVx 15-20-25 NVx015/PLENUM NVx 30-40 NVx030/PLENUM NVx 50 NVx050/PLENUM NVx 60 NVx060/PLENUM 1020 NVx 75 NVx075/PLENUM 1020 NVx SF90 NVxSF090/PLENUM 1639 1558 NVx SF120 NVxSF120/PLENUM 1639 1014 1588 NVx SF140 NVxSF140/PLENUM 1639 1200...

  • Page 14: Technical Data

    1.2 Technical Data Injector Sizes & Burner Pressures - Natural Gas - Group H - G20 Net CV (Hi = 34.02MJ/m³ High Fire Low Fire Burner Burner Injectors Gas Rate Gas Rate Pressure Pressure MODEL Size (mm) Marked mbar m³/h mbar m³/h Nominal Inlet...
  • Page 15 Electrical Loadings - 1Pha /F Models /CCF Models Start Amps (A) Run Amps (A) Fuse Rating (A) Start Amps (A) Run Amps (A) Fuse Rating (A) MODEL 0.54 NVx15 NVx20 1.05 0.33 12.6 1.05 0.33 12.6 NVx25 1.54 NVx30 NVx40 3.76 18.5 NVx50...

  • Page 16: General Requirements

    1.3.1. Related Documents 1.3.2 Location The installation of the air heater(s) must be in accordance Powrmatic NVx units are designed to operate within an with the rules in force and the relevant requirements of the ambient temperature range of -10 to 25°C.
  • Page 17 1.3.3 Electrical Supply 1.3.5 Flue System Wiring external to the air heater must be installed in Only flue systems supplied through Powrmatic Ltd may accordance with the I.E.E. Regulations for Electrical be used with NVx units. Several configurations of flue and Installations and any local regulations which apply.
  • Page 18 Plant Rooms 1.3.6 Ventilation Requirements Low level (inlet) 4cm²/kw of total rated net heat input High level (outlet) 2cm²/kw of total rated net heat input Type B flued installations Enclosures Where NVx heaters are installed within the heated space Low level (inlet) 10cm²/kw of total rated net heat input (ie not in a plant room or an enclosure) and having High level (outlet) 5cm²/kw of total rated net heat input a building design air change rate of greater than 0.5/h,...
  • Page 19 900mm of the outlets. A full and unobstructed return air path to the air heater(s) must be provided. 1.3.7.1 Ducting Requirements Model Air Volume m³/h Maximum Duct Resistance NVx15CCF 1512 NVx20CCF 2016 NVx25CCF 2808 NVx30CCF 3816...

  • Page 20: Fitting The Unit

    2.1 Fitting the Unit Front View R/H Side Views Distance from outside of heater to closest obstacle Distance RHS Clearance (when viewed at front of heater) 1000 LHS Clearance (when viewed at front of heater) Top of heater Rear of heater (dependent on flue system) NVx15F-30F 2500-3000 Recommended mounting heights (floor level to underside of unit)
  • Page 21 insulated from the structure by installing it on suitable 2.1.1 Fitting space requirement anti-vibration mountings. In all such cases and when the heater is suspended it is essential that all gas, duct, and For NVx/D units the normal air flow direction is from right electrical connections to the heater are made with flexible to left when viewing the heater from the burner/controls connections to maintain continuity of connection.

  • Page 22: Flue/Combustion Air Duct System

    Note: A terminal guard, as supplied by replace or make good with silicon sealant. Powrmatic Ltd, must be fitted to horizontal flue terminals. 6. Secure the exhaust fan outlet flange to the underside of the top panel and fit the blanking plates to the rear panel.
  • Page 23 1. Locate the position of the flue terminal, allowing for Extend the drainage off take of the condensate drainage a slight gradient running down from the heater to the length to a suitable gully or drain. terminal of 2° - 3° and cut a hole to suit. 4.

  • Page 24: General Identification Of Electrical Items

    -Combustion air entry should the drain be required in the future. Any clarification (fitted with inlet grille and inlet bend (not shown)) can be achieved by consulting with Powrmatic’s Technical Department. 2.3 General Identification of Electrical Items FAN / LIMIT THERMOSTAT...

  • Page 25: Electrical Cable Installation

    2.4 Electrical Cable Installation centrifugal fan/silencer duct section) are fully prewired Electrical Connections and only require final connections for the incoming mains supply and completion of the control circuit (230V). Warning: THIS APPLIANCE MUST BE EARTHED. Warning: Lockout reset is by a switched Wiring external to the air heater must be installed in Neutral to the controls in the heater.
  • Page 26 terminal 1 - 230V Heat Demand External Wiring terminal 2 - 230V Main Fan Only The wiring terminals are located inside the electrical box behind the side door which firstly has to be opened. terminal 3* - 0 - 10Volt (modulating) The mains supply connections are via a Hylec terminal terminal 4* - 0V (modulating...

  • Page 27: Wiring Diagrams

    2.5 Wiring Diagrams NVxF 15-140 Axial Fan Crossflow Units page no. 27 of 44 NVx Range Users, Installation & Servicing Instructions issue 6.4 Aug 2017.
  • Page 28 NVxCCF 15-50 Centrifugal Close Coupled Fan Units page no. 28 of 44 NVx Range Users, Installation & Servicing Instructions issue 6.4 Aug 2017.
  • Page 29 NVxCCF 60-75 Centrifugal Close Coupled Fan Units page no. 29 of 44 NVx Range Users, Installation & Servicing Instructions issue 6.4 Aug 2017.
  • Page 30 NVxCCF 90-140 Centrifugal Close Coupled Fan Units page no. 30 of 44 NVx Range Users, Installation & Servicing Instructions issue 6.4 Aug 2017.
  • Page 31 Additional Wiring for Opional Items Interconnecting Wiring: Powrmatic MC200 Blk 0.5 Vi 0.5 Br 0.5 On/Off Burner Wh 0.5 CON 3 Pactrol P25 CON3 MC200 fuelsaver 1 2 3 5 6 Modulation Burner 61 62 63 64 65 66 Or 0.5 Yel 0.5...

  • Page 32: Commissioning And Testing

    2.6 Commissioning and Testing a) Ensure that the ELECTRICAL supply to the heater is 2.6.1. Electrical Installation switched OFF. Checks to ensure electrical safety must be carried out by a b) Check that all warm air delivery outlets are open. qualified person.
  • Page 33 the burners have still not lit the control box will go to Governor adjustment screw under cover cap (Honeywell lockout and the amber indicator light, internal and remote VK4105A1001B) lockout lights will be illuminated. To restart the ignition sequence depress the illuminated reset button for about 1-2 seconds.
  • Page 34 2.6.6.1.2. High/Lo Regulator 2.6.6.1.3. Modulating Regulator 1. Set external controls to ensure the main burner is off. 1. Set external controls to ensure that the main burner is Open the side access panel. Connect a pressure gauge off. Open the side access panel. Connect a pressure gauge to the burner pressure test point on the multifunctional to the burner pressure test point on the multifunctional control.
  • Page 35 5. Turn off the main burner, disconnect the pressure gauge 1. The setting of the slide switches 1 & 2 should both be to and replace the sealing screw. Turn on the main burner and OFF. test for gas soundness around pressure test joint using a leak detection fluid.

  • Page 36: Servicing

    2.6.6.2. Flame Current 2.6.7. Fan/Limit Thermostat 1. To measure the flame current connect a multimeter Thermostat settings:- capable of measuring micro amps as shown in the Fan Off Fan On Limit following diagram. NVx 15-140SF 86°F/30°C 122°F/50°C 212°F/100°C 2. Minimum current reading is 0.5µA and normal value Note: NVx 15 to NVx 75 units have one fan/limit should be 1.5µA or higher.

  • Page 37: Model 15

    3. Remove the burner heat shield, 3 screws. 2.7.5 Main Fan Assembly 4. Release the inlet connection flange from the gas valve by 2.7.5.1. NVx/F & /CCF Models removing the four screws. 1. Inspect the fan blades for any damage or excessive 5.

  • Page 38: Nvx Range Users, Installation & Servicing Instructions Issue 6.4 Aug

    2. Remove the electrical plug connections from the top of 4. Remove the screws securing the thermostat to the the multifunctional control. bulkhead and withdraw. 3. Release the flanged connections at the inlet and 5. Reassemble new unit in reverse order referring to the outlet of the multifunctional control and remove the heater wiring diagram to ensure correct wiring as detailed multifunctional control.
  • Page 39 6. Fit replacement exhaust fan, using new gaskets and silicon sealant as necessary, and reassemble in reverse order. 2.7.6.6. Air Pressure Switch 1. Remove the two screws securing the cover and remove cover. 2. Disconnect electrical connections. 3. Pull off the sensing tube from the air pressure switch. 4.
  • Page 40 3.1 Fault Finding Start Gas & Electrical supplies present Checked the set points. External control in fan mode? Check Fuse "L" Failed Unit at Lockout (Lockout lamp on low will not level controls and Amber light on front on low level controls or the switch.
  • Page 41 Burners light? Check ignition electrode position. Is gas pipe work purged of air? Check gas pressures. Replace gas valve Exhaust fan continues to run APS has lost C. to N.O. continuity, slightly reduce APS set point. Burners remain alight? 4 more ignition attempts then lock out. Check connections.
  • Page 42 3.2 List of Parts Item Description Usage Part No. Gas Valve V4105A 15-50 145035208/KIT Gas Valve VR4605AB 60-90SF 145035204/KIT Gas Valve V425AB 120SF/140SF 141378715/KIT 15-75 142423002 Ignition Electrode 90SF - 140SF 142400004 Rectification (Flame Sensor) Probe 142423003 15-75 142400240 Burner 90SF - 140SF 142400241 Fan &...
  • Page 43 Limit Interlock P.C.B. MkIII 142403600/3 'JOX' 230V Relay 143000816 Pressure Switch Dungs LGW 146522174 15-50 140210496 Exhaust Fan Exhaust Fan c/w Mounting Brackets 15-50 NVX1050EXH/SP 60 & 75 140201505 Exhaust Fan Exhaust Fan c/w Mounting Brackets 60 & 75 NVX6075EXH/SP 90SF - 140SF 140201506 Exhaust Fan...
  • Page 44 More information is available from our web site on:- http://www.powrmatic.co.uk/products/heating/browse/view/product/nvx-gas-unit-heaters/ HEATING DIVISION Hort Bridge Ilminster, Somerset TA19 9PS Tel: 01460 53535 Fax: 01460 52341 Every effort is made to ensure accuracy at time of going to press. However as part of continued product improvement, we reserve the right to alter specification without prior notice.

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