Related Manuals for Nordair Niche DH2 75
Summary of Contents for Nordair Niche DH2 75
- Page 1 DIRECT FIRED DV/DH DIRECT GAS-FIRED MAKE-UP AIR UNITS Installation, Commissioning & Service Manual Ambi-Tec/Ambi-Stat...
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Page 2: Installation Instructions
Installation instructions lift truck with the fresh air inlet facing the cubicle fitted over the electrical outside wall. components, and an inlet cowl fitted to Related documents the fresh air inlet. The fresh air inlet weather louvre, cowl The installation of the Nordair direct gas etc should be sized at a maximum inlet fired air heater must be in accordance The heater is supplied as a single... - Page 3 Gas supply heater to prevent the straps from The amount of interconnecting wiring The Nordair Niche heater is designed for exerting any undue strain onto the will depend on the control system being use with natural gas and prpane. The heater frame.
- Page 4 DV Vertical Units Optional extra discharge Note - applicable to external units only. Discharge ductwork head for internal to be manufactured and fitted by the installer and is to be fully heaters. weather proofed and to form a tight seal to the top flange of the air heater.
- Page 5 DH Horizontal Units Weather proofed hood fitted to external units only. ‘B’ ‘A’ ‘F’ ‘B’ ‘H’ Clearance Electrical control panel Weather cubical fitted to external units only. ‘K’ ‘K’ ‘G’ Optional extra VIEW ON DISCHARGE OUTLET ACCESS SIDE VIEW discharge head for internal heaters Weather...
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Page 6: General Description
The Nordair Niche DV/DH Direct Fired Ambi-Tec electronic control panel, or a air handling unit is designed for In the event of the heater locking out, an Ambi-Stat AS1 thermostat panel. -
Page 7: Fuel Supply System
Commissioning & testing All manual gas valves are closed. velocity over the burner profile Nordair Niche DV/DH heaters are fully opening. Reading should be between All electrical supplies are isolated. tested before despatch, but still require 14 - 16m/sec. - Page 8 Burner commissioning second purge will commence followed As a cross check at high fire, measure Ambi-Tec controllers by pilot ignition and main flame ignition the outside air temperature and deduct at low fire. from the duct discharge temperature, Burner commissioning this should be 42˚C.
- Page 9 flags commence to move, then screw following inspection to be carried out Override the time clock and the air fan anti-clockwise until it remains steady, PRIOR TO commencing will start up. Check fan rotation is which is normally around the 10mmwg commissioning.
- Page 10 Burner commissioning plates. If flame lengths in excess of The flame at low fire should be a small Ambi-Stat controllers 250-300mm (10”-12”) occur, or orange continuous blue flame, along the full in colour, close burner isolating valve length of the burner, with a To be read in conjunction with the V6, until the correct length/colour is temperature rise of 5˚C maximum over...
- Page 11 Ensure gas valve motor rotational Component Limiting concentration switch to L (normal position). Reset (CL) PPM (5 V/V) active duct sensor temperature set Carbon Carbon Dioxide 2500 (0.25) point to 40˚C adjust the span settings Nitric Oxide (0.0005) to ensure the gas valve does not hunt replace cover.
- Page 12 Report check list SO NUMBER ..............DATE ............This sheet must be completed by the commissioning engineer after the heater has been started for the first time. TO BE RETAINED IN THE MANUAL CUSTOMER HEATER TYPE SERIAL No BMS CONTROLLER TYPE HEATER ADDRESS CUSTOMER UNIT REFERENCE TEST / COMMISSIONING / SERVICE...
- Page 13 Report check list SO NUMBER ..............DATE ............This sheet must be completed by the commissioning engineer after the heater has been started for the first time. TO BE RETURNED TO NORDAIR NICHE CUSTOMER HEATER TYPE SERIAL No BMS CONTROLLER TYPE...
- Page 14 Commissioning setting fresh air heaters This sheet must be completed by the commissioning engineer after the heater has been started for the first time. TO BE RETAINED IN MANUAL CUSTOMER HEATER TYPE SERIAL No BMS CONTROLLER TYPE HEATER ADDRESS MOTOR MOTOR PULLEY FAN PULLEY BELTS...
- Page 15 Commissioning setting fresh air heaters This sheet must be completed by the commissioning engineer after the heater has been started for the first time. TO BE RETURNED TO NORDAIR NICHE CUSTOMER HEATER TYPE SERIAL No BMS CONTROLLER TYPE HEATER ADDRESS...
- Page 16 Layout of electrical equipment DH heater Layout of electrical equipment DV heater...
- Page 17 Process diagram - DH Process diagram - DV Valve and instrument list Main Gas Isolating Valve Air Fan V3/V4 Combination main safety shut off valves Flame Rod valves incorporating electronic governor Ignition transformer Motorised Ball Valve Modulating Control Valve Motor Burner Isolating Valve Air Pressure Switch Pilot Gas Isolating valve...
- Page 18 Leak testing the gas line to pressurise the assembly between 18.Open V1, and rise in pressure the two safety shut off valves. indicates the downstream safety The procedure should be used in conjunction with the Process and Connect pressure gauge to shut off valve is passing gas.
- Page 19 NG11 burner assembly Description Part No Back Up Bar N0008 Body Gasket N0011 Burner Body N0002 M10 x 50 LG HEX Head Set Screw M5 x 12 HEX Head Set Screw M10 Nut and Washer Support Bracket/Gasket N0010 M5 x 40 HEX Head Set Screw M5 nut and Washer Stainless Steel Mixing Plate N0006...
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Page 20: Fault Finding
Servicing Check fan bearing for grease nipples, only the smaller range of heaters are The servicing of the DF heaters must fitted with “sealed for life” bearing, if only be carried out by a competent fitted with nipples regrease using Shell person Alvania R3. -
Page 21: Troubleshooting Checklist
Trouble shooting checklist Symptoms Fault Action Regardless of the position of the No power supply to the controller Check electrical supply-live to coloured wheel, the controller does not terminal 9 neutral to terminal 8. move even when reset. Faulty controller. Check by replacement. - Page 22 No main flame. Check main SSOV’s are opening. Note In the event that the fault cannot be traced, it is recommended that the services of a Nordair Niche Engineer be obtained. Nordair Niche (A Division of AmbiRad) 6-14 Bean Leach Road...
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Page 23: Recommended Spares
2000 running hours. Nordair Niche must be consulted if genuine parts are not to be used. Contact Nordair Niche(A Division of AmbiRad) -
Page 24: Replacement Instructions
75% of the measured differential and this should be carried out by a the access doors in the fan section. pressure between pressure points P8 Nordair Niche Engineer. and 9. Inadvertent substitution or replacement Modulating gas valve control unit... - Page 26 NORTEK GLOBAL HVAC (UK) LTD Fens Pool Avenue Brierley Hill West Midlands DY5 1QA United Kingdom Tel: 01384 489 250 Fax: 01384 489 707 nordairnichesales@nortek.com www.nordairniche.co.uk Registered in England No. 1390934. Registered office: 10 Norwich Street, London, EC4A 1BD Document reference number : GB/NOR/021/0408 Nortek Global HVAC is a registered trademark of Nortek Global HVAC Limited.