Installation Guidelines for Blow Thru Air Handlers

When choosing the proper model Blow Thru Air Handler, primary consideration should be given to calculated BTU loads and available power supply.

Blow Thru Series air handlers are non-ductable units designed to be installed high in a cabin area for proper air circulation. These units can be reversed between horizontal and vertical configurations to fit specific space requirements.

Blow thru units must be located in such a way as to deliver air directly into a cabin area. They must located against the inside of a bulkhead or partition common to the cabin to be conditioned. If the air handler cannot be flush mounted against the bulkhead, a short, sealed plenum chamber can be used, but must be equal or slightly larger than the fan coil surface. All units should accessible for service.

Securely fasten the blow thru air handler using the four(4) mounting grommets located in upper corners of the mounting plate. The supply air outlet must be equal in surface area and dimensions of the fan coil, See specifications for individual models. The return air inlet is to be properly sized and located underneath, alongside, or behind the air handler, dependent on its application. All return air grilles must have removable filters to trap dust or other sirborne particles. Return air grilles should not be located in such a way as to allow the supply air stream to blow directly into them. This will cause "short cycling" of the unit, resulting in poor performance.

Both condensation drain lines must connected to the air handler's two (2) drain spuds using reinforced flexible hose(5/8") and clamps. The drains may be teed together, providing there is a minimum drop of 2" from the drain pan to the tee fitting. The drain line must be routed downwards to a proper sump or overboard discharge. Properly secure th \e drain lines to prevent movement or lifting during vessel operation. Properly secure the drain lines to prevent movement or lifting during vessel operation. Check the drains upon completion by pouring two(2) quarts of water into the drain pan. Note: Condensation drain lines may need to be insulated when located overhead in lockers to prevent sweating of the line, which could cause water damage.

Water connections from the circulation circuit to the air handler are to be reinforced flexible hose and clamps. Attach the hose to the 5/8" hose barb fittings on the water inlet and outlet ofthe unit. All hose, pipe and connections must be insulated properly to prevent condensation. Use approved closed cell tube insulation (1/2" minimum) on the hose, and foam tape on the fittings (5 - 6 wraps).

All wiring must be sized according to marine design standards, Only stranded, tinned copper wire is to be used. All electrical connections to the air handler are to be made inside the electrical junction boxes provided on the assembly. All units must be properly grounded.