Powrmatic HEM-SL Series User, Installation And Service Manual
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Powrmatic HEM-SL Series User, Installation And Service Manual

Heat exchanger modules industrial & commercial heating systems
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Doc Ref: M103 Issue 3.1 Feb 2018
HEMNVx & SL Heat Exchanger Modules
Industrial & Commercial Heating Systems
User, Installation
& Servicing Manual
+ 4 4 ( 0 ) 1 4 6 0 5 3 5 3 5
w w w . p o w m a t i c . c o . u k
i n f o @ p o w r m a t i c . c o . u k

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Summary of Contents for Powrmatic HEM-SL Series

  • Page 1 Doc Ref: M103 Issue 3.1 Feb 2018 HEMNVx & SL Heat Exchanger Modules Industrial & Commercial Heating Systems User, Installation & Servicing Manual + 4 4 ( 0 ) 1 4 6 0 5 3 5 3 5 w w w . p o w m a t i c . c o . u k i n f o @ p o w r m a t i c .
  • Page 2 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.

  • 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

    All Powrmatic heaters use gas and electricity to power * An approved class of person listed on the gas safe them, they may also contain moving parts such as pulleys register.

  • Page 6: Dimensions

    Duties & Dimensions HEM-NVx Model HEM-NVx 10-3 15-4 18-5 25-5 30-6 40-8 50-6 60-7 75-9 100-12 110-13 125-15 150-18 175-21 200-24 10.0 15.0 18.0 25.0 30.0 40.0 50.0 60.0 75.0 100.0 110.0 125.0 150.0 175.0 200.0 On/Off 10.0 15.0 18.0 25.0 30.0 40.0...
  • Page 7 HEM-SL Model - HEM-SL 30-6 45-9 50-6 60-12 75-9 75-15 90-18 100-12 125-15 150-18 175-21 200-24 30.0 45.0 50.0 60.0 75.0 75.0 90.0 100.0 125.0 150.0 175.0 200.0 On/Off 30.0 45.0 50.0 60.0 75.0 75.0 90.0 100.0 125.0 150.0 175.0 200.0 Nat Gas Output...
  • Page 8 HEM-NVx Pressure Drop Graph page no. 8 of 48 NVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.
  • Page 9 HEM-SL Pressure Drop Graph page no. 9 of 48 NVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

  • Page 10: Technical Data

    1.2 Technical Data Injector Sizes & Burner Pressures - Natural Gas - Group H - G20 Net CV (Hi = 34.02MJ/m³ HEM-NVx (Max) (Min) Burner Gas Rate Burner Gas Rate Injectors Pressure (nominal) Pressure (nominal) MODEL Size (mm) Marked mbar m³/h mbar m³/h...
  • Page 11 Injector Sizes & Burner Pressures - Propane G31 Net CV (Hi = 88.00MJ/m³ HEM-NVx (Max) (Min) Burner Burner Injectors Gas Rate Gas Rate Pressure Pressure MODEL Size (mm) Marked mbar m³/h mbar m³/h HEMNVx 10-3 23.9 0.45 0.28 HEMNVx 15-4 1.15 25.3 0.67...
  • Page 12 Heater Specifications HEM-NVx Low Fire High Fire Min Air Flow Natural Gas Input Input Input Output Output Output Natural Gas (Nett) (Nett) (Nett) MODEL m³/s m³/h m³/s m³/h HEMNVx 10-3 11.0 0.34 1224 0.33 1188 HEMNVx 15-4 16.5 0.44 1584 0.35 1260 HEMNVx 18-5...
  • Page 13 Heater Specifications cont HEM-NVx Nominal CO2 Values Weights Power Conpumption Nat Gas (G20) Propane (G31) Module Packaging Total (High Fire) (High Fire) only MODEL HEMNVx 10-3 140.4 HEMNVx 15-4 140.4 HEMNVx 18-5 140.4 HEMNVx 25-5 140.4 HEMNVx 30-6 140.4 HEMNVx 40-8 140.4 HEMNVx 50-6 140.4...

  • Page 14: General Requirements

    1.3 General Requirements 1.3.1. Related Documents 1.3.2 Electrical Supply The installation of the module(s) must be in accordance Wiring external to the air heater must be installed in with the rules in force and the relevant requirements of the accordance with the I.E.E. Regulations for Electrical Gas Safety Regulations, Building Regulations and the I.E.E.
  • Page 15 1.3.4 Ventilation Requirements for AHU's 1.3.4.3 Type C flued installations. Refer to tables detailed on next page for calculated free Where AHU's are Installed within the heated space (ie areas of ventilation grilles. not in a plant room) Refer to Index 1 for Air inlet/exhaust flue and ventilation having combustion air ducted to the sketches appliance and combustion products ducted to the outside...
  • Page 16 1.3.6 Ventilation Requirements Type C12 or C32 Installation (these refer to section 2.2 of Type B22 Installation (these refer to section HEM-NVx these instructions) 2.2 of these instructions) Air vents shall be permanently open. Air vents shall be permanently open. Figures are for heaters in plant rooms or enclosures ONLY In all cases figures are per heater installed.

  • Page 17: Fitting The Unit

    Flue terminals may be extended by Modules may be orientated so that the burner manifold(s) the use of a Powrmatic approved flue piece with sealing is vertical or horizontal. ring or cut down to...
  • Page 18 For horizontal type B flued installations a Combustion The maximum permitted length of flue system is 18m. If an Air Inlet and Flue Termination piece is supplied for each offset is required a set of 45° bends should be used being module (two Combustion Air Inlets are supplied with equivalent to 0.5m of flue length.
  • Page 19 2.1.4.2 Type C Flued Installations For vertical type C flued installations a vertical concentric flue system should be used. Nominal flue diameters are either 80mm, 100mm or 130mm dependent on heater size (refer to duties section on page 6) The maximum permitted length of flue system is 9m, If an offset is required two sets of 45°...
  • Page 20 2.1.8 Flue System should be inspected and tested for soundness and purged in accordance with the recommendations of IM/16:1988. Only flue systems supplied through Powrmatic Ltd may be 2.1.6 Electrical Connections used with HEM modules. In all cases the flue outlet socket must be connected via the provided flue system to outside air.

  • Page 21: General Identification Of Items

    2.2 General Identification of Items Upper Burner Set Probe Exhaust Fan Exhaust Burner Set Exhaust Header Box (behind Heat Shield) Header Box Exhaust Fan Flow Sensing Point Exhaust Fan Upper Spark Ignition Probe Gas Valves Gas Inlet Lower Burner Set Controls Panel Spark Ignition...

  • Page 22: Electrical Cable Installation

    2.3 Electrical Cable Installation Electrical Connections - be in a readily accessible position adjacent to the heater(s). - serve only the heater(s). Warning: THIS APPLIANCE MUST BE - have a contact separation of at least 3mm in all poles. EARTHED. See section 2.4 or the accompanying wiring diagram for the heater electrical connections.
  • Page 23 2.4.2 Single and Dual Modulating Burners * where used t6 t7 2.4.3 Proving Switch Enable Circuit Main fan Proving Switch (suppled by others) page no. 23 of 48 NVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

  • Page 24: Wiring Diagrams

    2.5 Wiring Diagrams HEM Single Burner Unit (with ON/OFF Burner) page no. 24 of 48 NVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.
  • Page 25 HEM Dual Burner Unit (with ON/OFF Burner) page no. 25 of 48 NVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.
  • Page 26 HEM Single Burner Unit (with HIGH/LOW Burner) page no. 26 of 48 NVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.
  • Page 27 HEM Dual Burner Unit (with HIGH/LOW Burner) page no. 27 of 48 NVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.
  • Page 28 HEM Single Burner Unit (with Modulation Burner) page no. 28 of 48 NVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.
  • Page 29 HEM Dual Burner Unit (with Modulation Burner) page no. 29 of 48 NVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

  • Page 30: Commissioning And Testing

    2.6 Commissioning and Testing Gas Safety (Installation & Use) Regulations 1. Ensure that the gas service valve is closed. (Current Issue) 2. Switch on the electrical supply at the isolator and It is law that all gas appliances are the ignition sequence will commence. After a delay of installed, adjusted (converted if necessary) approximately 45 seconds the ignition spark will be and serviced by qualified persons* in accordance with...
  • Page 31 2.6.7 Adjustments 2.6.7.1.2. High/Low Regulator 2.6.7.1. Burner Gas Pressures 1. Set external controls to ensure the main burner is off. Open the side access panel. Connect a pressure gauge This is set for the required heat input before despatch. In to the burner pressure test point on the multifunctional the case of High/Low and Modulating units both high and control.
  • Page 32 Maximum Setting 5. Turn off the main burner, disconnect the pressure gauge and replace the sealing screw. Turn on the main burner and Disconnect electrical connection of modulating regulator test for gas soundness around pressure test joint using a and turn burners back on and wait until the burner leak detection fluid.
  • Page 33 2.6.8. Flame Current 1. Slide switches 1 & 2 should both be to 'OFF' if one modulating valve.is being driven (A), switch 1 'ON' and swtich 2 'OFF' if two modulating valves are being driven (B) 1. To measure the flame current connect a multimeter capable of measuring micro amps as shown in the following diagram.

  • Page 34: Servicing

    2.7 Servicing 4. Remove the spark and rectification probes from the side HEMNVx units should be serviced once per of the burner noting which is which. year. 5. If required remove the burner manifold by removing the Gas Safety (Installation & Use) Regulations four screws securing it to the burner assembly after having (Current Issue) first removed the burner front cover.
  • Page 35 3. Remove the screws holding the fan box assembly to the 3. Reconnect the new valve in the reverse order to that exhaust header and remove the assembly. above ensuring that the valve is correctly orientated. Renew the sealing 'O' rings if necessary. 4.
  • Page 36 2.7.6.5. Exhaust Fan 2. Disconnect electrical connections. 3. Pull off the sensing tube from the air pressure switch. 1. Remove the four screws securing the flue outlet socket. 4. Note the setting of the old pressure switch. 2. Disconnect the fan electrical connections from the main terminal strip 5.

  • Page 37: List Of Parts

    3.2 List of Parts Item Description Usage Part No. Gas Valve VR4605AB 145035204 Ignition Electrode 142423002 Rectification (Flame Sensor) Probe 142423003 Burner 142400240 Limit Thermostat 142403609 Control Box (Sequence Controller) 145030844 High/Low Governor Head All -/HL 142466402 Modulation Governor Head All -/MOD 142466403 Modulation Driver (GM44)
  • Page 38 Item Description Usage Part No. Exhaust Fan 10-50 140210496 Exhaust Fan 60 & 75 140201505 Exhaust Fan 140210499 Exhaust Fan 110-175 140201503 Exhaust Fan 140201507 NVx: 10-100 Brahma to Pactrol Replacement Kit for 145030847/KIT/HEM SL: 30/6-75/9, Single HEM-NVX OR HEM-SL Units 100/12 NVx: 110-200 145030847/KIT/HEM/...
  • Page 39 page no. 39 of 48 NVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.
  • Page 40 Apendix 1: Information required for ecodesign (ErP) Directive 2009/125 - HEM NVx Model 10-3 15-4 18-5 25-5 30-6 10.0 15.0 18.0 25.0 30.0 Rated Heat Capacity Nett CV 10.9 15.1 18.1 Low Heat Input 13.4 16.0 Minimum Heat Capacity High Fire Useful Efficiency Low Fire High Fire...
  • Page 41 Apendix 2: Information required for ecodesign (ErP) Directive 2009/125 - HEM SL Model 30-6 45-9 50-6 60-12 30.0 45.0 50.0 60.0 Rated Heat Capacity Nett CV 18.8 29.2 30.3 32.2 Low Heat Input 16.7 26.1 26.6 28.2 Minimum Heat Capacity High Fire Useful Efficiency Low Fire...
  • Page 42 No specific combustion air requirements - external location Flue can be front or top. Module supplied with Powrmatic flue terminal and flashing Care must be taken to ensure that flue exit point is not in proximity of windows/doors If necessary flue to be extended to a point where it has clearance from windows/doors.
  • Page 43 Stand alone application (ie HEM not within a secondary housing/ahu etc) Internal location HEM-SL & HEM-NVx - within open space (ie not plant room) Single module c/w Powrmatic burner enclosure Combustion air to Powrmatic burner enclosure via Powrmatic combustion air intake grille Combustion air to space where module is located in accordance with BS6230 Flue can be front or top.
  • Page 44 Stand alone application (ie HEM not within a secondary housing/ahu etc) Internal location HEM-SL & HEM-NVx - within open space (ie not plant room) Single module c/w Powrmatic burner enclosure Combustion air to Powrmatic burner enclosure via Powrmatic room sealed flue kit Combustion air to space where module is located in accordance with BS6230 Flue can be front or top.
  • Page 45 Combustion air via Powrmatic combustion air intake grille Combustion air provision in accordance with BS6230 Plant room ventilation in accordance with BS6230 Flue can be front or top. Module terminates with flue spigot for onward connection by others Powrmatic approved flue to be used Discharge and return air to appliance must be positively ducted.
  • Page 46 Stand alone application (ie HEM not within a secondary housing/ahu etc) Internal location HEM-SL & HEM-NVx - within a plant room as defined by BS6230 Single module c/w Powrmatic burner enclosure Combustion air ventilation requirements in accordance with BS6230 Plant room ventilation in accordance with BS6230 Flue can be front or top.
  • Page 47 page no. 47 of 48 NVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.
  • Page 48 More information is available from our web site on:- http://www.powrmatic.co.uk/products/heating/browse/view/product/hem-nvx-heat-exchange-module 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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