Dometic 39726.506 manual

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Table of contents for the manual

  • Page 1

    1 INSTALLATION INSTRUCTIONS APPLICA TION MANUAL AND INST ALLA TION INSTRUCTIONS THIS UNIT IS DESIGNED FOR OEM INSTALLATION ALL INITIAL INSTALLATIONS MUST BE APPROVED BY THE SALES DEPT. ROT AR Y COMPRESSOR SYSTEM MODELS Air Conditioners 39626.501 & 39626.506 Heat Pump s 39726.501 & 39726.506 SYSTEM MODELS SELF-CONT AINED AIR CONDITIONER &[...]

  • Page 2

    INSTALLATION INSTRUCTIONS 2 TABLE OF CONTENTS: 1.0 SAFETY INSTRUCTIONS ........................................................................... PAGE 3 2.0 APPLICATION MANUAL ............................................................................. PAGE 4 2.1 AIR DISTRIBUTION ...................................................................[...]

  • Page 3

    3 INSTALLATION INSTRUCTIONS 1.0 SAFETY INSTRUCTIONS This manual has safety information and instruc- tions to help users eliminate or reduce the risk of accidents and injuries. RECOGNIZE SAFETY INFORMA TION This is the safety-alert symbol. When you see this symbol in this manual, be alert to the potential for personal injury . Follow recommended pre[...]

  • Page 4

    INSTALLATION INSTRUCTIONS 4 2.1 AIR DISTRIBUTION 2.1.1 GENERAL INFORMATION The purpose of an air conditioning system is to provide environmental conditions in a space to keep its occupants comfortable. The basic elements of a simple forced circulation air system consists of a cooling unit, a centrifugal blower, a temperature sensing device controll[...]

  • Page 5

    5 INSTALLATION INSTRUCTIONS 2.1.5 AIR FLOW AND FRICTION Air flows in a duct system from a region of high pressure to a region of lower pressure. The blower creates the pressure differential which causes the air flow through the duct system. The point of highest pressure in the system is at the outlet of the blower. The point of lowest pressure in t[...]

  • Page 6

    INSTALLATION INSTRUCTIONS 6 ITEM 1 Sharp Angle ITEM 4 Long Radius Bend ITEM 2 Rounded Outer Corner ITEM 5 Splitters, or turning vanes installed in sharp angle bend ITEM 3 Rounded Corners ITEM 6 Splitters in rounded corner bend EDDIES EDDIES ABRUPT EXPAN- SION SMALL DUCT EDDY LOSSES LARGE DUCT FIG. 2.9 Abrupt expansion results in excessive pressure [...]

  • Page 7

    7 INSTALLATION INSTRUCTIONS 4. Sudden contractions in air stream 5. Sudden expansions in air stream 2.1.7 REGISTERS, DIFFUSERS, AND GRILLE SELEC- TION One of the most important considerations in designing a conditioning system is the selection of the registers, diffus- ers and grills. Even though a system delivers the required amount of conditioned[...]

  • Page 8

    INSTALLATION INSTRUCTIONS 8 It is the responsibility of the installer to en- sure the duct work will not collapse or bend during and after installation. Dometic Corpo- ration will not be liable for any structural dam- age due to improperly insulated, sealed or collapsed duct work. CAUTION Dometic Corporation will not be held liable for roof structu[...]

  • Page 9

    9 INSTALLATION INSTRUCTIONS 2.5.0 MOUNTING IN COACH The dual basement air conditioner and heat pump are designed for under the floor installation. It is the vehicle manufacturer's responsibility to provide an installation space which will allow for cutouts and mounting of the unit without cutting vital frame structures. The frame and structura[...]

  • Page 10

    INSTALLATION INSTRUCTIONS 10 System Model 39726.501 & 39726.506* Nominal BTU Capacity 26,000 Volts/Phase/Hertz (each circuit) 115 AC / 1 / 60 Run Amps Comp (Circuit 1 =10.0) (Circuit 2 = 9.8) LRA Compressor (Circuit 1 = 59.0) (Circuit 2 = 59.0) Total Blwr/Fan Motor Run Amps 8.5 (Circuit 1) Total Blwr/Fan Motor LRA Amps 18.0 (Circuit 1) Duct Sta[...]

  • Page 11

    11 INSTALLATION INSTRUCTIONS C HERM HERM C 3108345.061 FIELD WIRING FIELD WIRING FACTORY WIRING FACTORY WIRING P4 P3 P5 NC P6 COM K6 COM NO K1 F1 P1 P2 NO T3 NC T1 3 AMP FUSE 3 AMP FUSE CIRCUIT CIRCUIT MOTOR COND. BLOWER COND. BLOWER EVAP . BLOWER EVAP . BLOWER MOTOR COMPRESSOR R C S OL COMPRESSOR S C OL R = WIRE NUT = WIRE NUT ELEC. BOX BLKHD SENS[...]

  • Page 12

    INSTALLATION INSTRUCTIONS 12 3.1 GENERAL INFORMATION 3.1.1 THIS UNIT IS DESIGNED FOR: A. Installation in a recreational vehicle at the time the vehicle is manufactured. B. Heating operation in a MILD GEOGRAPHICAL AREA where the heat loss is minimal. C. Turning "OFF" the heat pump and switching to furnace (aux. heat) when the outside tempe[...]

  • Page 13

    13 INSTALLATION INSTRUCTIONS Where the return air must be provided through louvers or mesh screen, the FREE AREA percentage of the material used shall be taken into consideration when making this determination. An example of how to determine FREE AREA is included in "3.2.2. Outside Coil". B . Grills (See FIG. 3.4) Note: The return air gri[...]

  • Page 14

    INSTALLATION INSTRUCTIONS 14 3.3 ELECTRICAL WIRING E. Circuit #2 should be wired through the on-board generator or a separate power cord dedicated to Circuit #2. Note: A standard 30 amp hookup will not power both Circuit 1 and Circuit 2 and the coach's other major appliances. 3.3.2 SUPPLY WIRE CONNECTION A. Connect main power supply Cir. #1 to[...]

  • Page 15

    15 INSTALLATION INSTRUCTIONS B. Route a dedicated DC supply line (18-22 AWG copper conductors) from the Converter or Battery to the unit's electrical box. Connect with wire nuts positive (+) DC to the red wire; Negative (-) DC to the black wire. C. Route thermostat wires from the furnace (if applicable) to the electrical box and attached them [...]

  • Page 16

    INSTALLATION INSTRUCTIONS 16 6. If an Energy Management System - EMS (load shed) is to be used with the control, two wires must be routed to the electrical control box. The signal required for this function is a normally open relay contact. When the EMS calls for the com- pressor to shut off, the relay contacts should close. Make sure that at least[...]