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Part #470656
IG/IGX Make-Up Air Unit
®
Installation, Operation and Maintenance Manual
Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the
product described. Protect yourself and others by observing all safety information. Failure to comply with instructions
could result in personal injury and/or property damage! Retain instructions for future reference.
General Safety Information
Only qualified personnel should install this un
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moisture build up. Leave coverings loose to permit air Receiving circulation and to allow for periodic inspection. Upon receiving the product, check to make sure all items are accounted for by referencing the bill The unit should be stored at least 3½ in. (89 mm) off of lading to ensure all items were received. Inspect the floor on wooden blocks covered with moisture each crate for shipping damage before accepting proof paper or polyethylene sheathing. Aisles between delivery. Notify the ca
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3. After storage period, purge grease before putting Sequence of Operation, Furnace – fan into service. 2:1 Staged ............................38 2:1 Modulation ...................... 39-40 Operation of Controller – Indirect Gas Fired Unit Installations 4:1 Modulation/8:1 Staged Controller .... 40-41 Units are listed for installation in the United States and Sequence of Operation, Furnace – Canada. 4:1 Modulation ...................... 41-42 • Installation of gas fir ed duct fur naces
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Installation of Indoor Unit Installation of Arrangement DB / HZ 1. Install Curb and/or Equipment NOTE Support(s) To prevent premature heat exchanger failure, do not Position curb/equipment support(s) on the roof locate units where chlorinated, halogenated, or acid (reference the CAPS submittal for placement of curb/ vapors are present. equipment support(s) in relation to the unit). Verify that unit supports are level, shim if necessary. Attach curb 1. Install Hangers to roof and flash i
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2. Install Combination Curb Adaptor NOTE Install combination curb adaptor over curb, use wood The use of all lifting lugs and a set of spreader bars screws to lag in place. Locate extension so the tall is mandatory when lifting the unit. louvered side is over the exhaust opening, as shown in illustration. Caulk extension to combination curb NOTE adaptor. Fasten extension to curb adaptor with #12 Some units come with the weatherhood attached sheet metal screws (field provided). and ste
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7. Install Supply Unit Installation of Roof Mounted Unit Use a crane and a set of spreader bars hooked to the Arrangement DBC, continued factory lifting lugs to lift and center the unit on the extension/equipment support(s). 4. Apply Sealant Use self-tapping sheet metal screws to fasten the unit Apply an appropriate sealant around the perimeter of to the extension/equipment support(s). the curb and duct adapter(s) to isolate fan vibration and prevent water penetration. Exhaust Duct Instal
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Installation of Evaporative Cooling Installation of Venting for Outdoor Units Module (optional) NOTE 1. Follow Guidelines All of the following guidelines must be followed when Small evaporative coolers ship attached to the base installing the unit. unit and require no additional mounting. 1. Locate Equipment Support(s) WARNING Roof Curb Position equipment support(s) on the roof (reference Do not install units in locations where flue products the CAPS submittal for Metal Cover can be drawn
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Venting Methods Installation of Venting for Indoor There are three venting methods for indoor mounted Units units. For each method, the units can be vented horizontally through an exterior wall or vertically WARNING through the roof. Specific venting instructions are The following guidelines must be followed for all indoor provided for each method and shown in the following units: pages. Construct the vent system as shown in these 1. Installation of venting must conform with local ins
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Vent Pipe Diameter Installation of Standard Indoor Select the vent pipe diameter. Use only the specified Venting pipe diameter. Standard Indoor Venting uses one penetration through an exterior wall or roof for venting the flue exhaust. Furnace Size Exhaust Pipe Diameter (MBH) (inches) The combustion air is supplied from the air inside the building. Units must not be installed in a potentially 4 75 - 175 explosive, flammable, or corrosive atmosphere. To 200 - 400 6 prevent premature heat exc
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Installation of Concentric Venting Concentric Venting – Horizontal (General) Refer to the diagram below for venting on horizontal concentric systems. Maintain at least 12 inches from Concentric venting allows the exhaust pipe and the combustion air inlet guard to the exhaust vent combustion air pipe to pass through a single hole in terminal (Dim. B). To prevent water from running the roof or wall of the building. A concentric venting into the combustion air pipe and to allow for easy ada
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3. Install Exhaust Pipe Concentric Venting – Vertical Slide the exhaust pipe through the CVA. Provide Refer to the diagram below for venting on vertical enough exhaust piping to pass through the wall (or concentric systems. Maintain at least 12 inches floor) and provide the minimum clearance of 12 inches between the top of the combustion air inlet terminals between the exhaust pipe termination and the and the bottom of the exhaust terminal. (Dim. B). combustion air intake. With all requi
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2. Attach Mounting Brackets 7. Install Combustion Air Inlet Guard and Attach field-supplied, corrosion resistant, mounting Exhaust Vent Terminal brackets to the CVA using corrosion resistant sheet Slide the combustion air terminal over the vent pipe metal screws. and fasten it to the combustion air pipe. Attach the 3. Install Exhaust Pipe exhaust vent terminal to the discharge end of the exhaust piping. Slide the exhaust pipe through the CVA. Provide enough exhaust piping to pass throu
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2. Install Combustion Air Pipe Installation of Two Pipe Venting – Run a combustion air pipe from the unit’s combustion Horizontal air intake through the exterior wall to the outdoors. Refer to the diagram below for venting on horizontal The combustion air pipe must terminate at least 12 concentric systems. Maintain at least 12 inches of inches from the combustion vent pipe and 24 inches clearance between the exhaust pipe termination and from the exterior surface of the outside wall. Att
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Installation of Two Pipe Venting – 1. Install Exhaust Pipe Run an exhaust pipe from the unit’s combustion Vertical exhaust through the roof to the outdoors. The exhaust Refer to the diagram below for venting on vertical pipe must terminate at least 12 inches above the concentric systems. The combustion air pipe must outside surface of the roof. This clearance may need terminate at least 12 inches above the roof. This to be increased to accommodate snow accumulation. clearance may need t
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1. Determine the Size of the Main Power Installation - Electrical Wiring Lines The unit’s nameplate states the voltage and the unit’s IMPORTANT total MCA. The main power lines to the unit should be Before connecting power to the unit, read and sized accordingly. The nameplate is located on the understand the following instructions and wiring outside of the unit on the control panel side. diagrams. Complete wiring diagrams are attached on the inside of the control center door(s). Voltage,
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6. Wire the Evaporative Cooler (optional) Reference the ladder diagram on the inside of the control center door for correct wiring of the pump and the optional water valves. NOTE Large evaporative coolers may require a separate power supply. 7. Install Economizer Sensors (optional) All economizer options (EC) require an outdoor air temperature or enthalpy sensor to be field installed inside of the weatherhood and field wired to terminals SO+ and SO- on the economizer. Economizer options
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1. Determine the Supply Gas Installation of Gas Piping Requirements IMPORTANT The unit’s nameplate states the requirements for the gas being supplied to the unit. All gas piping must be installed in accordance Minimum gas pressure for maximum output with the latest edition of the National Fuel Gas Code ANSI/Z223.1 and any local codes that may MAX BTU/HR MIN BTU/HR apply. In Canada, the equipment shall be installed BTU/H MAX BTU/H MIN in accordance with the Installation Code for Gas NORMA
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Installation - Evaporative Cooler Piping (optional) Evaporative Cooling with Recirculating Pump Evaporative Cooling with Auto Drain and Fill Supply Line Supply Line Sump Overflow VALVE A Supply Line Valve Supply Solenoid (normally closed) Sump Drain Drain Line Valve (normally closed) (normally open) VALVE C Drain Line Sump Drain Solenoid (normally open) Overflow VALVE B Trap Trap Supply Line Drain Solenoid (normally open) Drain Line Recirculating Evaporative Piping Auto Drain & Fill Evaporative P
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TM 1. Install the Water Supply Line Installation of Water Wizard (optional) Supply line opening requirements vary by unit size Evaporative Cooling with the Water Wizard™ and arrangement and are field-supplied. Connect the water supply line to the float valve through the supply NOTE line opening in the evaporative cooling unit. Install The following instructions are provided for the 1/2 inch normally closed solenoid (Valve A) in the evaporative coolers equipped with the Water supply line.
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Installation of Water Wizard™, Installation - Direct Expansion (DX) continued Coil Piping (optional) To Media IMPORTANT Pressure Gauge Factory Guidelines for the installation of direct expansion Installed cooling coils have been provided to ensure proper Sump Drain performance and longevity of the coils. These are Manual Supply Valve general guidelines that may have to be tailored to meet the specific requirements of any one job. As always, a qualified party or individual should Roof Line
