Related Manuals for Powrmatic NV DH Series
Summary of Contents for Powrmatic NV DH Series
- Page 1 The NV DH Range Installation and Servicing Instructions (Brahma Control) WARNING: THIS APPLIANCE MUST BE EARTHED £4.00 When supplied separately. NV DH Range Users, Installation & Servicing Instructions Issue 3 April 2010...
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Page 2: Table Of Contents
Installation & Servicing Instructions C O N T E N T S Section Title Page Introduction Technical Data General Requirements Installation Air Distribution System Commissioning & Testing Servicing Primary Electrical Connections Fault Finding Short List of Parts Tables Title Page Dimensions Specifications Injector Sizes &... -
Page 3: Certificate Of Guarantee
7. Powrmatic ‘General Conditions of Sale’ have been observed. 8. 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 costs arising from loss of use of the appliance, or any event arising there from. - Page 4 The burners will then light. All Powrmatic heaters use gas and electricity to power them, 2. If the burners fail to light the control box will automatically they may also contain moving parts such as pulley belts. It would restart the ignition sequence.
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Page 5: Introduction
1. INTRODUCTION The NV/DH range are highly efficient gas fired air heaters that cover heat outputs of 10kW to 140kW and are for insertion into air handling units (AHU’s) or ducted systems. Higher heat outputs may be achieved by using more than one NV DH unit in a common housing. -
Page 6: Technical Data
2. TECHNICAL DATA Alternative flue positions Front Side NV20/D SHOWN Alternative flue positions Front Side NV60/D SHOWN Alternative flue positions Front Side Alternative flue positions NV140 SHOWN... - Page 7 Table 1. Dimensions Flue Model Ø (mm) NV10 750 296 192 NV15 120 262.5 NV20 NV25 1000 NV30 NV35 172.5 236.5 NV40 NV50 123.5 NV60 1345 248.5 1010 NV75 NV90 NV120 2345 244.5 1948 2014 1035 NV140 Table 2 - Specifications HIGH FIRE LOW FIRE Req’d...
- Page 8 Table 3.1 Injector Sizes & Burner Pressures Natural Gas - Group H - G20 Net CV (Hi) = 34.02MJ/m³ High Fire Low Fire Inlet INJECTORS Pressure Burner Burner Gas Rate Gas Rate 20mb Pressure Pressure MODEL Size Marked mbar m³/h mbar m³/h NV10...
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Page 9: General Requirements
For NV/D units of 10 - 50 size, reference should also be made The air heater must be connected to the flue system that is provided by Powrmatic Ltd. Several configurations of flue and BS 5864. Code of Practice for installation of gas-fired ducted-air combustion air ducts are available as shown diagrammatically heaters of rated input not exceeding 60kW. -
Page 10: Air Distribution System
4. Installation of Air Heater(s) 4.3.3 Installation of Flue System 4.1 General Note:A terminal guard, as supplied by Powrmatic Ltd, must be Before installation, check that the local distribution fitted to horizontal flue terminals. conditions, nature of gas and pressure, and adjustment 4.3.3.1 Horizontal System - Rear Outlet... - Page 11 NV DH Flue/Combustion Air Duct Options Fig 1a Exhaust only system - horizontal Fig 2a Individual system - horizontal (front outlet shown) (rear outlet shown) Single to twin Terminal Terminal Adjustable Lengths F l u e a d a p t o r l e n g t h Flue socket outlet...
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Page 12: Commissioning & Testing
See the wiring diagram accompanying these instructions. spigots on the heater. NV/DH models must be electrically interlocked to the air 1. Locate the position of the flue terminal, allowing for a slight movement system. A connection from the heater terminal marked gradient running down from the heater to the terminal of 2°... - Page 13 6.4 Checks before lighting the Air Heater 3. SHUT OFF Switch OFF the electrical supply to the heater or set the clock The following preliminary checks should be made before lighting control to OFF or set the room thermostat to MIN. the heater(s) Ensure that the ELECTRICAL supply to the heater is 6.6 Adjustments...
- Page 14 6.6.1.3 Modulating Regulator 1. Set external controls to ensure that the main burner is off. Remove the side access panel. Connect a pressure gauge to the burner pressure test point on the multifunctional control. Figure 5 2. Set external controls so as to turn on the main burner and Governor adjustment maintain high fire.
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Page 15: Servicing
7.4 Heat Exchanger 6.6.2 Air Heater Controls 1. Close the gas service tap and ensure that the gas valve is Whilst the main burner assembly is removed from the unit check heard to close within 1 second and that the lockout light is that the primary sections that the burners fire into are clean. -
Page 16: Control Box
5. If needed transfer the fan mounting box to the replacement fan. 6. Fit replacement exhaust fan, using new gaskets and silicon sealant as necessary, and reassemble in reverse order. 7.6.6 Air Pressure Switch 1. Disconnect electrical connections. 2. Pull off the sensing tube from the air pressure switch. 3. -
Page 17: Primary Electrical Connections
8. Primary Electrical Connections LIVE NEUTRAL EARTH 240V Live input - Heating On 240V Output to Main Air Fan control relay or contactor coil (if required) NV HEATER Momentarily Connect to Neutral for Lockout reset 240V Lockout signal 0-10V 0-10V NVDH Modulating NVDH Hi/LO 0-10Vdc signal... -
Page 18: Fault Finding Flow Chart
9. Fault Finding Flow Chart START Turn supplies on Gas & Electrical Check fuses/connections supplies present at heater Unit at overheat (red lamp on front panel on) Remove high limit thermostat cover cap and push button to reset Check Fuse ‘L’ Blown Replace (3.15A), ascertain cause Check for faulty high limit thermostat or faulty connection. -
Page 19: Short List Of Parts
10. Short List of Parts Only originally specified parts may be fitted as service replacements and all items are available from the Powrmatic Ltd Spares Department. Please refer to Powrmatic Ltd for any parts not shown in the listing. ITEM... - Page 20 BSI Registered Firm FM 414 Ind. & Comm. Air Heaters; Air Moving Equipment; Flues & Chimneys; Natural Smoke & Heat Ventilators; Powered Supply & Extract Fans & Systems. ISO 9001 HEATING DIVISION Hort Bridge Ilminster, Somerset TA19 9PQ Tel: 01460 53535 Fax: 01460 52341 Every e ort is made to ensure accuracy at time of going to press.
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