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TK 55676-19-IM-EN
A/C Evaporator Installation
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Always keep A/C system fittings capped and sealed until the installation of the refrigeration hoses.
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Determine the best location for the A/C evaporator inside the sleeper, typically under the bunk.
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Verify there is no interference with any OEM electrical wiring, internal supports, etc. before drilling any mounting
holes.
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The evaporator should be mounted directly onto the floor mat inside the sleeper by using the supplied template to
locate the drain and mounting holes.
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Always install the drain valves (kazoos) onto evaporator drain tubes securely with hose clamps.
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The A/C vents should be located and installed to provide maximum air circulation in the sleeper such as: LOW (floor
level), MEDIUM (above lower bunk level) or HIGH (above upper bunk level).
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All mounting holes must be sealed with silicone caulk to prevent moisture or exhaust fumes from entering the
sleeper.
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All edges of access holes made in fiberglass and wood composite floors must be sealed correctly with fiberglass
cloth and resin.
D2/D4 Heater Installation
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Determine the best location of the heater inside the sleeper, typically under the bunk. Allow clearance for
dismantling for service.
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Install heater so it will maintain a minimum distance of 2.00 inches (50.8 mm) from any heat sensitive or flammable
material.
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Heater must be mounted on a flat horizontal surface.
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Heater must be installed flush with the floor pan (i.e. sheet metal, fiberglass, etc.) to ensure proper sealing of the
mounting plate and gasket.
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All edges of access holes made in fiberglass and wood composite floors must be sealed correctly with fiberglass
cloth and resin.
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Outside air intake and exhaust hoses must be installed correctly for the heater to operate safely.
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Exhaust hose should be mounted slightly downwards to help drain off condensation.
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Install exhaust hose so it will maintain a minimum distance of 2.00 inches (50.8 mm) from any heat sensitive or
flammable material.
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Inside air inlet and outlet ducts must be installed correctly for the heater to operate safely.
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Pulse fuel pump must be installed at a 15 to 35 degree angle from horizontal to operate correctly.
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Fuel pickup tube must be installed correctly in the fuel tank or the heater will not operate.
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Fuel line from the pickup tube to the fuel pump to the heater should be routed at a continuous rise.
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Use a hose cutter or sharp knife to cut plastic fuel lines. Do not use a wire cutter as this will pinch the plastic fuel line
closed.
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Do not route electrical wires, harness or battery cables together with fuel lines.
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BEFORE operating the heater, the fuel lines must be bled of air using the Heater Priming Harness (204-1144) or
damage to the fuel pump will result.
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The Diagnostic Code Reader (204-1143) must be used to setup and operate the heater in the run-in mode.
A/C Hose Connections and Routing
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Always keep A/C system fittings capped and sealed until the installation of the refrigeration hoses.
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Only cut refrigerant hoses with the correct hose cutting tool (204-677). NEVER USE A SAW!
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Always use the correct hose fitting tool (204-1045) when assembling refrigeration hoses.
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Always lubricate hose fittings with PAG 100 refrigerant oil (2030502) when assembling to refrigeration hoses.
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Always install and lubricate O-rings with PAG 100 refrigerant oil (2030502) when connecting refrigeration hose
fittings to component connection fittings.
