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Nortek AB 225 Installation And Operating Manual

Gas fired room sealed air curtain
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A
IRBLOC
G
AS
I
NSTALLATION AND
INDEX
General Information -------------------------------------------------------- 1
Dimensions -------------------------------------------------------------------- 2
Installation Details ---------------------------------------------------------- 4
Wiring Details ---------------------------------------------------------------- 5
Servicing ---------------------------------------------------------------------- 6
Commissioning -------------------------------------------------------------- 7
Parts Replacement ---------------------------------------------------------- 8
Spare Parts -------------------------------------------------------------------- 9
Fault Finding --------------------------------------------------------------- 10
User Instructions ----------------------------------------------------------- 11
Nortek Global HVAC (UK) Ltd equipment must be installed and maintained in accordance with
the relevant provisions of the Gas Safety (Installations and Use) Regulations 1998 for gas fired
products. Due account should also be taken of any obligations arising from the Health and Safe-
ty at Works Act 1974 or relevant codes of practice. In addition the installation must be carried
out in accordance with the current IEE wiring regulations (BS 7671), BS 6896 (Industrial & Com-
mercial) and any other relevant British Standards and Codes of Practice by a qualified installer.
All external wiring MUST comply with the current IEE wiring regulations.
Nortek Global HVAC (UK) Limited, Fens Pool Avenue, Brierley Hill, West Midlands, DY5 1QA
AB R
F
R
S
IRED
OOM
EALED
O
ANGE
A
C
IR
URTAIN
M
PERATING
Part No. 702120
Doc No. 702120 Page of 44
ANUAL
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  • Page 1: Table Of Contents

    User Instructions ----------------------------------------------------------- 11 WARNINGS Nortek Global HVAC (UK) Ltd equipment must be installed and maintained in accordance with the relevant provisions of the Gas Safety (Installations and Use) Regulations 1998 for gas fired products. Due account should also be taken of any obligations arising from the Health and Safe- ty at Works Act 1974 or relevant codes of practice.

  • Page 2: General Information

    1. General Information. Welcome to the new AB Airbloc gas fired air All dimensions shown are in mm unless heater models. Local regulations may vary in the otherwise stated. country installers responsibility to ensure that such regulations are The manufacturer reserves the right to alter satisfied.

  • Page 3: Dimensions

    (kg) AB 175 1750 1090 1710 AB 225 2250 1090 2210 AB 225 module AB 225 module AB 175 module FRONT VIEW PLAN VIEW NOTE: Module configurations can vary. (see table on page 4) SIDE VIEW Doc No. 702120 Page 3 of 44...

  • Page 4: Technical Specifications

    Type Centrifugal (with integral thermal trip) Speeds No. of fans Maximum air volume 9600m /hr (AB 175) 12800m /hr (AB 225) Voltage 230V 1PH 50Hz Power rating (per fan) 1140 W Current (per fan) 5.2A (FLC) Start current (per fan)

  • Page 5: Installation Details

    Gap to be kept to a minimum moved to the desired position and the locking pins re-tightened. NOTE: The AB 225 model has two pairs of intermediate locking Allen pins, whereas the AB 175 model only has one pair. Fig. A...
  • Page 6 FRONT VIEW Cantilever brackets Factory fitted (not supplied) mounting brackets Diagram 4: Cantilever bracket mounting Flue technical details. Model AB 225 AB 175 Gas type Natural gas (G20) Propane (G31) Natural gas (G20) Propane (G31) Mass flow rate of 0.0340 0.0332...
  • Page 7 4. Installation Details cont. Diagram 5: Typical flue arrangement (AB 625 shown) Ventilation requirements are detailed in section 4.3. Flue fan Flue damper Flue damper Flue damper FRONT VIEW Diagram 6: Typical flue arrangement Diagram 6A: Typical flue arrangement with horizontal terminal with vertical terminal Flue fan SIDE VIEWS...
  • Page 8 4. Installation Details cont. SUPPLIED FLUE COMPONENTS A (112996) B (112984) C (112985) D (112991) E (112997) F (112995) I (112998)(L) J (112989)(R) G (112986) H (112987) QUANTITY AIR HEATER MODULES AB350 (LH) 2 x 175 AB350 (RH) 2 x 175 AB400 (LH) 1 1 x 175 1 x 225 AB400 (RH) 1...
  • Page 9 4. Installation Details cont. OPTIONAL FLUE COMPONENTS 524-872mm adjustable (113901) 90 deg. elbow (112992) 45 deg. elbow (113900) 955mm flue length (112985) Vertical terminal (114174) Horizontal terminal (112994) Wall band 50mm ext (113844) Wall band extension 300mm (113845) Wall band extension 50-100mm (113846) Doc No.
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  • Page 26: Wiring Details

    5. Wiring Details. Diagram 7: Burner control wiring In addition to the above burner wiring diagram, a customer specific control panel wiring diagram will be supplied with each air heater. WARNING: THIS HEATER SHOULD NOT BE INSTALLED WHERE THERE IS A CORROSIVE ATMOSPHERE.
  • Page 27 5. Wiring Details cont. 5.1 Burner controls The panel also contains a removable link on the The burner controls are mounted in the burner main terminal rail to allow the air heater to be control cubicle which is an integral part of the air switched on and off remotely via a BMS control heater casing and are accessible by opening a relay.

  • Page 28: Servicing

    6. Servicing. These appliances should be serviced annually by a competent person to ensure safe and efficient operation. In exceptionally dusty or polluted conditions more frequent servicing may be required. The manufacturer offers a maintenance service. Details available on request. Isolate gas and electricity supplies before commencing any work.
  • Page 29 6. Servicing cont. Fig.0 Fig.3 Clean out the emitter tubes using a suitable flue brush/scraper fitted with flexible extension rods. Fig.1 Fig.4 Remove the six flue box lid retaining nuts from their captive studs as shown in Fig.2. then remove lid taking care not to damage the gasket.

  • Page 30: Commissioning

    7. Commissioning. This appliance must be commissioned by 7.5 Burner gas pressure adjustment a suitably qualified engineer The gas pressure is set for the required heat input before the appliance leaves the factory, 7.1 Gas connection normally, provided the gas supply to the air Only persons suitably qualified to work on gas heater is in accordance with the supply pressure fired appliances may carry out commissioning...
  • Page 31 7. Commissioning cont.  Re-check manometer reading. Fig.6  Re-tighten flue damper handle grub screw. 7.7 Air solenoid timer setting. (2 module) Each burner is fitted with an electronic timer to control the operation of the three port air solenoid valve. The timers should be adjusted in pairs using the settings dials as shown in the following pictures: Gas flow...

  • Page 32: Parts Replacement

    8. Parts Replacement. 8.1.1 Gas valve. All servicing/maintenance work on this air Remove electrical connectors as shown in Fig.8 heater should be carried out by suitably qualified and Gas Safe registered engineer. Fig.8 Before commencing any work please ensure that the gas and electricity supplies are turned off.
  • Page 33 8. Parts Replacement cont. Using a suitable pair of spanners release the The manifold can now be removed downwards union on the outlet side of the gas valve as complete with injectors. Fig.13 shows the shown in Fig. 10. manifold with injectors in isolation for clarity. Fig.13 Fig.10 Remove the two mounting bracket screws as...
  • Page 34 8. Parts Replacement cont. Lift the air pressure switch upwards from the 8.1.6 Flame probe. rear of the mounting plate then remove the three Remove the flame probe cable spade connector female spade connectors as shown in Fig.16 as shown in Fig.19. then remove switch.
  • Page 35 8. Parts Replacement cont. 8.1.8 Overheat thermostats 8.1.7 Spark electrode Remove the two retaining screws securing the Remove the HT cable spade connector from the thermostat access lid as shown in Fig.25. ignition sequence controller as shown in Fig.22. Fig.25 Fig.22 Disconnect the spade terminals from the self Remove fixing screw as shown in Fig.23.
  • Page 36 8. Parts Replacement cont. 8.2 Air distribution fans. Remove the spade terminals from the manual The air distribution fans can be accessed by removing the retaining screws securing the hinged lid on the underside of the air heater. Fig.28 See Fig.31 Fig.31 reset thermostat as shown in Fig.
  • Page 37 8. Parts Replacement cont. Fig.34 Fig.37 shows single air distribution fan in isolation for clarity. Fig.37 Fan outlet Fan closure plate 8.2.2 Fan removal Identify the feed cable for the fan requiring removal and disconnect it from its cable mount- ed plug/socket.

  • Page 38: Spare Parts

    Recommended spares Note: Any spare parts or components used In order to aid troubleshooting and servicing we that are not approved by Nortek could invali- recommend that the components shown in this date the approval of the appliance and also the section should be stocked.

  • Page 39: Fault Finding

    If the heater still fails to 1. Burner inlet pressure. operate normally, 2. Burner nozzle pressure. please contact 3. Check live & neutral polarity. the Nortek 4. Check presence of good service department. earth. Doc No. 702120 Page 39 of 44...
  • Page 40 1. Motor thermal trip (may run Single fan when cool), test motor. unit off? 2. Motor wiring. 3. Motor plug/socket. If the fan(s) still fail to operate normally, please contact the Nortek service department. Doc No. 702120 Page 40 of 44...
  • Page 41 Notes. Doc No. 702120 Page 41 of 44...
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  • Page 44: User Instructions

    Registered in England No. 1390934. Registered office: 10 Norwich Street, London, EC4A 1BD Nortek Global HVAC is a registered trademark of Nortek Global HVAC Limited. Because of continuous product innovation, Nortek Global HVAC reserves the right to change product specification without due notice.

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Ab 175

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