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  • Nitrogen purging during brazing?

  • Using 15% brazing rod?

  • Heat Pump no flow selector

  • System Selector Refrigerant Piping Layout - being followed with actual lengths entered on page?

  • Do refrigerant pipe sizes match selector tool layout?

  • System Selector.gif
  • Pipe hangers clevis style with saddle? (As per picture below)

  • Saddle Hanger.gif

Heat Recovery - Flow Selectors

  • Flow Selector - In an area where the operating sound of the solenoids will not be objectionable?

  • Mounted in the horizontal position? (See picture below)

  • Flow Selector.jpg
  • Flow Selector - Installed with proper clearances and service access Per drawing with 3' of clearance for electric access.

  • Add media

  • Enter the distance that the flow selector is mounted from the indoor unit __________________ft. Must be ≤ 49 Ft. refrigerant piping length

  • Do the field installed refrigerant line sizes and lengths, to the flow selector match the piping layout?

  • Nitrogen Purge during brazing, and heat protection used when brazing at Flow Selector?

Indoor Refrigerant Piping: Branching Joints

  • Branch joint are correct size and match System Selector Tool?

  • Header Type Branch Joint : Installed horizontal within ± 10° per instructions? (As shown in photo below)

  • Headers.gif
  • Y Type Branch Joint : Installed horizontal within ± 15° per instructions? (See picture below)

  • Horizontal Y.gif
  • Installed vertical per instructions? (See picture below)

  • Y Branches.gif
  • Are branch joints properly supported?

  • Maintain a minimum distance of 18" between branching joints, elbows and equipment? (Per picture below)

  • 18in rule.gif
  • Sockets, joints and insulation were installed per instructions?

  • No traps per rules and shown in picture below ?

  • Trap Rule.gif
  • Expansion joints installed per installation instructions? (See picture below)

  • Expansion Loop.gif

Pipe Insulation

  • Is pipe insulation 1" close cell UV Rated 245 Degrees F?

  • Are all pipes insulated separately?

  • No gaps or cuts in insulation?

  • Are Insulation joints glued and not crushed?

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