Mitsubishi Electric 250YHA-A - Manuals

7 5. Installing the refrigerant piping A Flare cutting dimensions B Flare nut tightening torque 90 ° ± 0.5 ° ø A R0.4~R0.8 A 45 °± 2 ° B C D Fig. 5-1 5.1. Precautions for devices that use R410A refrigerant • Refer to page 3 for precautions not included below on using air conditioners with R410A refr...

10 5.7. Precautions when reusing existing R22 refrigerant pipes • Refer to the flowchart below to determine if the existing pipes can be used.• See below for oil condition. Clear to slight yellow color → Normal Black or brown → Pipe cleaning is necessary. • If the diameter of the existing pipes is d...

11 7. Electrical work Fig. 7-1 7.1. Outdoor unit (Fig. 7-1, Fig. 7-2) (1) Remove the service panel.(2) Wire the cables referring to the Fig. 7-1 and the Fig. 7-2. A Indoor unit B Outdoor unit C Remote controller D Main switch (Breaker) E Earth Indoor unit model Phase Outdoor unit Frequency & Vol...

14 10. System control (Fig. 10-1) 9.3. Refrigerant collecting (pump down) Perform the following procedures to collect the refrigerant when moving the indoorunit or the outdoor unit. 1 Before collecting the refrigerant, first make sure that the all of the SW5 DIP switchesfor function changes on the c...

Please be sure to put the contact address/telephone number on this manual before handing it to the customer. H E A D O F F I C E : TOKYO B L D G . , 2 -7- 3 , M A RU N O U C H I , C H I YO DA - K U, TO K YO 1 0 0 - 8 3 1 0 , JA PA N Printed in Japan BG79U638H03