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Nortek AB 175 Installation, Operation & Parts

Gas fired air curtain
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CQS
!
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury, death, or
property damage.
Be sure to read and understand the installation, operation, and service instructions in
this manual.
Improper installation, adjustment, alteration, service, or maintenance can cause
serious injury, death, or property damage.
—
Do not store or use gasoline or other flammable vapors and liquids in the vicinity
of this or any other appliance.
—
WHAT TO DO IF YOU SMELL GAS
•
Do not try to light any appliance.
•
Do not touch any electrical switch; do not use any phone in your building.
•
Leave the building immediately.
•
Immediately call your gas supplier from a phone remote from the building. Follow the gas supplier's
instructions.
•
If you cannot reach your gas supplier, call the fire department.
—
Installation and service must be performed by a qualified installer, service agency,
or the gas supplier.
Installation, Operation & Spare Parts Manual for
Gas Fired Air Curtain
APPLIES TO:
Models AB 175 and AB 225
Form I-A C (2-17)
Obsoletes Form I-A C (2-16)
Form I-A C (2-17), Page 1

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Summary of Contents for Nortek AB 175

  • Page 1 Obsoletes Form I-A C (2-16) Installation, Operation & Spare Parts Manual for Gas Fired Air Curtain APPLIES TO: Models AB 175 and AB 225 WARNING: FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury, death, or property damage.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1.0 General ..............2 8.0 Pre Startup Check, Adjustment, Startup & Shut- down ..................14 1.1 Cautions and Warnings ........2 8.1 Pre Startup Check .......... 14 1.2 General Information .......... 3 8.2 Gas Connection Check ........14 1.3 Warranty ............

  • Page 3: General Information

    Never place or rest anything, especially ladders against the air curtain. The installation instructions in this manual apply to Gas Fired Air Curtain Models AB 175 and AB 225. Refer to limited warranty information on the warranty form in the “Literature Bag”...

  • Page 4: Air Curtain Location

    68-7/8” 37-3/8” 18” 27-9/16” 32-5/16” 4-7/8” 67-5/16” 45-1/4” 14” 3-5/16” 14-5/8” AB 175 1750 1710 1149 88-9/16” 37-3/8” 18” 27-9/16” 32-5/16” 4-7/8” 87” 45-1/4” 14” 3-5/16” 14-5/8” AB 225 2250 2210 1149...

  • Page 5: Combustible Clearances

    FIGURE 2 - Dimensional Clearances Gap to be kept to a minimum Door Bottom of air curtain to be level with top of door opening Outside 6’- 0” (1.8m) minimum For safety and convenience, provide clearances as shown in the following table. 4.2 Combustible Clearance to combustibles is defined as the minimum distance from the heater to a Clearances...

  • Page 6: Position And Mounting

    5.0 Position and Determine the position of the air curtain with regard to clearances, venting, gas supply connection, gas pressure, electrical supply connection and working height Mounting consideration. Air curtain units are supplied with mounting brackets pre-fitted as either a single or multiple units which can be bolted together for various door widths.

  • Page 7: Adjusting Of Air Outlet Louvers

    • Loosen the two button head socket cap screws that lock the louvers in position. (Note: two pair on Model AB 225 & one pair on Model AB 175) as shown. • Now move the louvers to desired position and retighten all bolts / screws.

  • Page 8: Mechanical

    6.0 Mechanical Models AB 225 AB 175 Technical Specifications Gas type Natural Propane Natural Propane Gas connection 1/2”NPT Max supply pressure (i.w.c.) 14.0 Min supply pressure (i.w.c.) 5.0 / 12.0 Gross heat input (BTU) 225,000 175,000 Gross heat output (BTU)
  • Page 9 For Propane: The unit can be converted to propane by using a field installed natural gas to propane kit, Option DL2. Use P/N 1005716 for Model AB 175 or P/N 1005717 for Model AB 225. Once converted set the pressure to 12.0 inches of water column. Inlet supply pressure to the valve for propane must be a minimum of 12 inches water column and a maximum of 14 inches water column.

  • Page 10: Venting

    6.0 Mechanical WARNING (cont’d) The vent must be installed in accordance with national and local 6.2 Venting regulations. Failure to provide proper venting could result in death, serious injury and / or property damage. This unit must be installed with a vent to the outside of the building. Safe operation of any power-vented, gas-fired equipment requires a properly operating vent system, correct provision for combustion air and regular maintenance and inspection.
  • Page 11 FIGURE 6 - Typical Exhaust (Vent) Vertical Flue Terminal Arrangement 24.00” (610mm) minimum 24 ft (7.3m) maximum 4 ft (1.2m) minimum Fan to 6”dia (152 mm) flue adapter (supplied) FRONT VIEW FIGURE 7A Typical Horizontal Flue Arrangement REAR EXIT I/D fan rotated 90°...
  • Page 12 90°Elbow 45°Elbow inch feet feet feet AB 175 152.4 AB 225 152.4 Condensation Any length of single-wall pipe exposed to cold air or run through an unheated area or an area with an ambient temperature of 45°F (7.2°C) or less, must be insulated along its entire length with a minimum of 1/2”...

  • Page 13: Electrical And Wiring

    7.0 Electrical and All wiring and connections, including electrical grounding, MUST be made in accordance with local, state and national codes and regulations and with the National Electrical Wiring Code (ANSI/NFPA 70) or in Canada the Canadian Electric Code Part 1 CSA C.22.1. In addition, the installer should be aware of and comply with any local ordinances or gas 7.1 Wiring company requirements.

  • Page 14: Burner Controls

    7.3 Burner Controls The burner controls are mounted in the burner control compartment which is an integral part of the air curtain cabinet and is accessible by opening a hinged lid on the on the right hand side of the air curtain unit, reference FIGURES 8 & 9 shown below. FIGURE 8: Remove two lid retaining screws FIGURE 9:...

  • Page 15: Gas Pressure Adjustment Procedure

    8.4 Gas Pressure To check the pressure use the following steps: Adjustment 1. Using the data contained in the Technical Specifications table shown on page 8 and as noted on the rating plate to determine the correct gas pressure for the air Procedure curtain.

  • Page 16: Vacuum Setting Check

    Remove the cap from the one port on the tee-fitting (reference picture shown below) and connect a calibrated manometer at this port. Remove Cap Vacuum Setting Range (i.w.c.) AB 225 AB 175 Cold .60 - .65 .30 - .35 .50 - .55 .20 - .25...

  • Page 17: Trouble Shooting

    9.0 Trouble Shooting Trouble Shooting the Air Distribution Fan(s) Verify the gas & electric services are on and Check: that the remote console 1) Ignition controller power & heat switches are “ON” Is there power Check: to the burner? 1) Operation of cycling limit controls.
  • Page 18 9.0 Trouble Trouble Shooting the Air Distribution Fan(s) Shooting (cont’d) Power to the control Check: Panel? 1) Power supply Check: 1) Control panel manual All air distribution on/off switch position fans on? 2) Fan circuit breaker(s) 3) Fan contactor and associated wiring Check: 1) Motor thermal trip...

  • Page 19: Spare Parts

    P/N 201419 Propane Conversion Kits Conversion Kit to convert Air Curtain Model AB 175 from natural gas to L.P. - P/N 1005716. Conversion Kit to convert Air Curtain Model AB 225 from natural gas to L.P. - P/N 1005717. NOTE: Refer to Propane Conversion Instructions, Form CP-C A-GC, Document No D303078 for installation instructions of the kits listed above.

  • Page 20: Service

    To insure continued safe and efficient operation the air curtain should only be serviced 11.0 Service by a qualified technician. It is recommended that this unit be inspected / serviced once a year. If this unit is located in a exceptionally dusty area, service should be performed on a more frequent basis.
  • Page 21 NOTES: Form I-A C (2-17), Page 21...

  • Page 22: Index

    INDEX Adjusting of Air Outlet Louvers 7 Net Weight 4 Air Curtain Location 4 Amber Neon 19 Orifice 19 Burner 19 Pipe Diameter 12 Burner Controls 14 Position and Mounting 6 Pressure Settings 9 California Warning Label 3 Pressure Switch 19 Clearances 5 Pre Startup Check 14 Clearances to Horizontal Vent 11...

  • Page 23: Installation Record

    INSTALLATION RECORD - to be completed by the installer: Installer: Name ________________________________________________________ Company ________________________________________________________ Address ________________________________________________________ ________________________________________________________ ________________________________________________________ Phone _________________________________ Distributor (company from which the unit was purchased): Company ________________________________________________________ Contact ________________________________________________________ Address ________________________________________________________ ________________________________________________________ ________________________________________________________ Phone _________________________________ Model ________________ Serial No.______________________________Date of Installation ____________ SPECIFIC INSTALLATION NOTES: (i.e.
  • Page 24 Specifications & illustrations subject to change without notice or without incurring obligations. © Nortek Global HVAC, LLC 2017. All rights reserved. All marks are property of their respective organizations. O’Fallon, MO I Printed in the U.S.A. (2-17) D303077-A Form I-A C (2-17)

This manual is also suitable for:

Ab 225

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