Panasonic 26PEK2U6 26PEK2U6 Service Manual - Page 153
Increasing the Fan Speed, How to read the diagram, Indoor Fan Performance, Type 26, Fig. 1-115
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6-30. Increasing the Fan Speed If external static pressure is too great (due to long extension of ducts, for example), the air flow volume may drop too low at each air outlet. This problem may be solved by increasing the fan speed using the following procedure: (1) Remove 4 screws on the electrical component box and remove the cover plate. (2) Disconnect the fan motor sockets in the box. (3) Take out the booster cable (sockets at both ends) clamped in the box. (4) Securely connect the booster cable sockets between the disconnected fan motor sockets in step 2 as shown in the Fig. 1-114. (5) Place the cable neatly in the box and reinstall the cover plate. Fan motor 1. Specifications Electrical component box Booster cable Booster cable Fan motor socket (At shipment) (Booster cable installed) Fig. 1-114 1 How to read the diagram The vertical axis is the external static pressure (Pa) while the horizontal axis represents the air flow (CFM). The characteristic curves for "HT", "H", "M" and "L" fan speed control are shown. The nameplate values are shown based on the "H" air flow. For the Type 26, the air flow is 636 CFM, while the external static pressure is 49 Pa at "H" position. If external static pressure is too great (due to long extension of duct, for example), the air flow volume may drop too low at each air outlet. This problem may be solved by increasing the fan speed as explained above. Refer to " SUPPLEMENT ON DRAIN PIPING". External Static Pressure Indoor Fan Performance Type 26 Type 36 200 0.8 (inAq) Limit line External Static Pressure (Pa) (inAq) 150 150 0.6 Limit line (Pa) 0.5 0.5 Limit line Limit line 100 0.4 100 0.4 0.3 HT 50 0.2 H M 0.1 L 0 0 300 500 700 900 Air Flow (CFM) 50 0 500 0.3 HT 0.2 H M 0.1 L 0 1000 Air Flow (CFM) NOTE HT : Using the booster cable H : At shipment Fig. 1-115 1-145