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General Installation and Start-Up Instructions for the Heat-X-Changer

READ INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO ASSEMBLE, SERVICE OR OPERATE XETEX HEAT-X-CHANGER UNITS. FAILURE TO COMPLY WITH INSTRUCTIONS COULD RESULT IN PERSONAL INJURY AND/OR PROPERTY DAMAGE!

SPECIAL WARNING: No untrained person should attempt to install, maintain, or service XeteX Heat-X-Changer units.

RECEIVING THE UNIT AT THE JOB SITE

• Check the unit over to see that no damage has occurred during the shipment process. If any damage is found, report it on the bill of lading and immediately notify the trucking company.
• Check the listed approximate weight of the unit before removing it from the truck. It should correspond with the unit ordered.
• Using spreader bar, remove the unit from the truck.
• Remove any of the shipping hardware from the fans, vibration isolators, and any other moving parts.
• Remove the hold down straps and any supporting devices used in shipping. Readjust and secure the vibration isolators for proper operation.

Roof-top Installation:

• Major support should be provided at the perimeter of the unit and at the furnace section. (The unit can rest on the angle iron perimeter frame, but do not rest the unit where there is not unit framing underneath.
• Apply sealant to the top edge of the roof curb and lift the unit onto the curb. (Factory ordered curbs are shipped knocked down. This allows for an easier field assembly.)
• Secure and fasten the unit to the curb.
• Units may require additional job site sealing on the joints, corners or gasketed components, particularly on large units that tend to loosen in shipment and rigging. Appropriate all-weather caulking should be applied on the outside unit casing at any location where leakage could occur.

Indoor Installation:

• Units may be directly mounted on the Floor, suspended on a platform, or hung from solid threaded rod attached to the unit shipping support brackets.
• Installation must be in accordance with standard air handling structural weight and vibration isolating procedures and requirements.

PLUMBING CONNECTIONS

• Install the drain connections for the location at least the size of the drain outlet connection. Indoor unit drains generally extend through the side. Outdoor unit drains extend through the bottom or into a plumbing and electrical chase that is provided inside the unit. A convenient way to prevent freezing on outdoor traps is to wrap the plumbing drain line and trap with electrical tape. All drains must be trapped, even those outside, to prevent air from being sucked into the drain section from outside the case thus preventing water from draining freely out of the drain pan.
• Pipe and trap the condensate drains (provided by the contractor). This should be done to the nearest floor drain or drain pipe. An 8" trap must be supplied close to each drain outlet to assure a standing water column at least equal to the total system air pressure to be experienced at the drain. Each drain must be trapped separately and independently to assure that pressure from one trap does not affect the others
• Check to make sure that the drain pans are not punctured by piping, electrical conduit or by other means to assure that potentially damaging water leaks do not occur.

ELECTRICAL CONNECTIONS

• Check the power and voltage that is required. The electrical diagram is located on the back panel of the main electrical enclosure.
• Connect the fused power and control voltage to the unit (if this is not provided with transformer).
• Wire any remote mounted equipment and controls (remote panels, thermostats, etc.)
• Provide the main disconnect if it is not provided on the unit.

SHEET METAL CONNECTIONS

• The sheet metal duct work must be connected to the unit in accordance with acceptable sheet metal procedures as outlined by the Sheet Metal and Air Conditioning National Association, Inc (SMACNA).
• Duct sizing, material weight, composition, and connection methods must be in accordance with the engineering plans and specifications.
• Vapor sealed insulation should be installed in accordance with the engineering specifications.

START UP

• Check the following before attempting to start the unit
  • Main disconnect MUST BE OFF
  • Fan switches MUST BE OFF (the remove panel should also be OFF)
  • Power and control voltage and phase supplied to the unit must be checked to assure that they correspond to the unit installed electrical components.
  • Before power is turned on, tighten all electrical screw connections on the control panels and all power panels.
  • Check all control sequences in accordance with the wiring diagrams for the unit to assure proper functioning of controls.
  • Fans must rotate freely and in the correct direction.
  • Each fan must be checked for RPM settings required in the engineering performance documents. Fan to motor RPM ratios may be checked by comparing the number of turns the motor pulley takes in relation to one complete revolution of the fan pulley. i.e.
    (fan RPM) / (motor RPM) = (motor pulley Pitch Diam.) / (fan pulley Pitch Diam.)
  • Belt tension and alignment must be correct.
  • Drain traps must be primed with water.
  • Drain pans and exterior casing should be visually inspected for leaks and sealed as required.
  • Check the instructions in the next section for start-up instructions on optional equipment.
• After assuring yourself that all electrical, sheet metal, plumbing, and other connections have been properly made, checked all times mentioned above, and are reasonably sure that the unit will be safe to start, turn on main power.
• Momentarily turn on one fan motor at a time. Check the fan rotation and correct the motor wiring as required.