FLOOR/CEILING 17 Refrigerant Piping Connections(FLARE Connections)To avoid alteration of unit capacities, check that pipinglengths and changes in elevation are kept to a strictminimum.Before connectiong the refrigerant lines, follow theprocedures below (if pre-charged connection lines arenot supplied):- Select copper pipe diameters according to the size ofunit to be installed.- Install the refrigeration lines, checking that no foreignbodies get inside the piping.- Install the flare connectors and flare the ends of thepipes.This unit is shipped complete with a charge of R407C refrigerantthat will be sufficient for an interconnecting piping length of 5meters. Maximum Piping LengthsNote : Where the difference in elevation between theindoor unit and the outdoor unit is greater than 5meters, install an oil trap every 5 meters.The suction line must have a 2% gradient up to thecompressor on horizontal sections.Where piping lengths are unusually long and include alarge number of oil traps, it may be necessary to adjustto compressor charge.Refrigerant charge to be added per extrametre of piping length when more than 7.5meters.Unit size 9 12 18 25 35 45 55D (m) 12 15 15 22 20 24 20L (m) 15 18 18 25 25 30 30H (m) 10 12 12 20 22 26 26MCC-MCH/MOC-MOHUnit size 9 12 18 25 35 45 55g/m 15 15 40 40 40 40 40Low PressureGas ValveLiquid ValvePressure TapOutdoor Unit Indoor UnitGas LineLiquid LineR407CHigh PressureManifoldPOWEREMERGENCY SWITCHTIMERCOMPPOWEREMERGENCY SWITCHTIMERCOMPDLHL

installation manual

MCC-MCH/MOC-MOH

Safety Precautions

Part List

Preparation Before Installation

Drilling Measurement

Remote Control Receiving Type Setting

Installation in the Following Places May Result in Trouble

Installation Diagram

Installation Procedure

Indoor Unit

Outdoor Unit

Test Operation

Trouble Shooting Guide

Diagnostic Information Function

Technical Specification

York MCC-MCH 09 Installation Manual

MCC-MCH 09

MCC-MCH 12

MCC-MCH 18

MCC-MCH 25

MCC-MCH 35

MCC-MCH 45

MCC-MCH 55