Carrier 40QNB018 Installation, Start-up And Service Instructions Manual

Also see for 38BK-018: Owner's manual

Contents

8. With the remote controller, turn on the unit and operatein each mode (as applicable) for 15 minutes to test forproper operation. Do not operate in cooling mode if out-door temperature is below 55 F (HDC,BK) or 0° F (HDS)unless unit is equipped with low ambient control (HDC,BK) or winter start kit (HDS). Do not operate in heatingmode (heat pump systems only) if the outdoor tempera-ture is above 75 F.9. Test for proper refrigerant charge using the superheatmethod (HDC,BK) or subcooling method (HDS).10. Explain basic system operation to the owner.40QN Control System — The 40QN unit is equippedwith a microprocessor control which operates the system.This control is located in the control box of the fan coil unit,with thermistors located in the fan coil inlet and on the in-door coil. The 40QNE heat pump fan coil units also havethermistors located on the outdoor coil and in the outdoor airinlet. These thermistors monitor system operation and con-trol the operating mode. To change settings or modes of op-eration, use the factory-supplied infrared wireless remotecontroller. This controller allows the fan coil unit to be op-erated from within the same room without any wire connec-tions to the unit.The remote controller includes a wall-mounted bracket.To install the bracket, attach bracket to the wall as shown inFig. 17 using factory-supplied, double-sided tape. Install factory-supplied batteries into the remote controller per To Install orReplace Remote Controller Batteries section on page 12, andplace the controller into the bracket so that it will be readyfor use.After Extended Shutdowns — If the system has beenturned off for more than 12 hours, turn on the indoor andoutdoor unit disconnect switches to supply power to the sys-tem for 12 hours BEFORE starting the system.Seasonal Changeovers — When changing heat pumpsystem from cooling to heating or heating to cooling, or be-fore starting cooling only system after it has been out of usefor the winter season, perform the following steps BEFOREstarting the system:1. Inspect and clean the outdoor unit, particularly the coil.2. Clean or replace the air filters in the indoor unit.3. Clean the indoor unit drain pan and drain pipe, and re-move any obstructions.4. Turn on indoor and outdoor unit disconnect switches tosupply power to the system 12 hours before starting thesystem.To Turn the Unit On and Off — To turn the unit on,press the orange ON/OFF button (See Fig. 18). Unit will start.To stop unit operation, press the ON/OFF button again. Unitwill stop. Refer to Owner’s Manual enclosed with the fancoil unit for full remote control operating details.Adjusting Airflow — The airflow direction may be ad-justed up and down using the remote controller, and fromside to side by manually moving the vents. For cooling onlyunits and heat pump units when in the cooling mode, set thelouvers to discharge straight out (parallel to the floor) (seeFig. 19). For the heat pump units operating in heating mode,it is recommended that the air discharge louvers be set todischarge vertically (see Fig. 19).The swing range shown in Fig. 19 is the range which willprovide maximum occupant comfort in each mode. It is rec-ommended that the louvers be positioned within this range(using the remote controller).NOTE: The full swing range for the mode selected will au-tomatically be used if auto. fan mode is selected.Operating Mode Memory — After the system is turnedoff or after a power failure, the system remains in the lastoperating mode selected. When the system is turned backon, or when power is automatically restored, operation con-tinues in the same operating mode as when power shut down.Fig. 17 — Mounting Remote Controller BracketFig. 18 — Remote Controller*Potential range.†Desirable range.NOTE: Unit is equipped with manual air vents which direct the airfrom side to side. Up and down louver motion can be selected usingthe remote controller. For maximum comfort, set louvers within theswing range. See Adjusting Airflow section on this page for moreinformation.Fig. 19 — Louver Adjustments10