Mitsubishi Electronics PUHY-YMC specification

10.8.Thermal insulation of refrigerant piping

Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit and insulating material, and insulating materials themselves. When in- sulation work is insufficient, there is a possibility of condensation drip, etc. Pay special attention to insulation work to ceiling plenum.

B A C

	Heat	Glass fiber + Steel wire
	insulation	Adhesive + Heat - resistant polyethylene foam +
	material A	Adhesive tape
	Outer	Indoor	Vinyl tape
	Outer	Floor exposed	Water-proof hemp cloth + Bronze asphalt
	covering B	Floor exposed	Water-proof hemp cloth + Bronze asphalt

		Outdoor	Water-proof hemp cloth + Zinc plate + Oily paint
		Outdoor	Water-proof hemp cloth + Zinc plate + Oily paint

Note:

When using polyethylene cover as covering material, asphalt roof- ing shall not be required.

ENGLISH

DE

ASteel wire

BPiping

CAsphaltic oily mastic or asphalt

DHeat insulation material A

EOuter covering B

• Do not insulate gas or low pressure pipe and liquid or high •		Be sure to fully insulate connecting portion.
pressure pipe together.
B	A Liquid pipe	A
A	B Gas pipe
Bad example	C Electric wire
	C Electric wire
	C D Finishing tape
	E Insulating material

E D

A These parts are not insulated.

EE A Liquid pipe

		B Gas pipe
Good example	B	A D Finishing tape
Good example		E Insulating material
		E Insulating material

D

Note:

No heat insulation must be provided for electric wires.

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Mitsubishi Electronics PUHY-YMC installation manual Thermal insulation of refrigerant piping

Contents

PUHY-YMC Contents Before installation and electric work Safety precautionsBefore getting installed Before getting installed moved electrical work Before starting the test run Combination with indoor units Confirmation of parts attached Model Name Connecting pipe Elbow Shape Outdoor unit configurationSelection of installation site Variable capacity unit Constant capacity unit When there is an obstruction above the unit Individual installationWhen inlet air enters from right and left sides of unit Space required around unit Collective installation and continu- ous installation Lifting method and weight of productBe very careful to carry product Example of collective installation Installation of unitInstallation Location of anchor bolt 60/61 dB A-weighted Connecting direction for refrigerant pipingDown piping and down wiring precautions Noise level PUHY-400/500YMC Snow and seasonal windCountermeasure to seasonal wind PUHN-200/250YMC Areas of caution Refrigerant piping installationNever perform a pump down. This will damage the compressor Refrigerant piping system + α Multiple line/header Precautions concerning piping connection and valve operation For variable capacity unit Gas side Liquid side Oil balance side Figure shows valve fully open 100 to 1000 to Tightening angle standard Pipe diameter mm 50 to 57.5 / 500 to75 to 750 to 60 to Oil balance pipe connection method Distributor gas connection method Part could be damaged if not cooled sufficiently Restrictions on the posture for attaching joints How to install branch pipeJoint Gram below Airtight test Airtight test and evacuationEvacuation No heat insulation must be provided for electric wires Thermal insulation of refrigerant piping Penetrations Inner wall concealed Floor fireproofing Electrical work Variable capacity unit Control box and connecting posi- tion of wiringConstant capacity unit Hole For details, see item 11.3. Wiring transmission cablesPlate Transmission booster optional Wiring examples Wiring transmission cablesConnecting a transmission booster Name, code and possible unit connections One remote control unit for each indoor unit Wiring method, address settingRemote control RC terminal block TB6 Within Address Unit Remote control operation Same as above For details, see wire connection example C Unit Range Setting method Wiring LineSame group to the remote control RC terminal block TB6 Main remote controller Extended length and the length to the most remote unit Booster RP WiringCapability Number of connected indoor units that can be Wiring of main power supply and equipment capacity Checking before getting test run Operation procedureTest run Test run method How to cope with test run abnormality Abnormality Display at LED lighting blinking Remarks Flag Relay output 6603 Transmission error Transmission route Busy ErrorPower on Flag 8 always lights Coping with remote controller abnormality Following phenomena do not represent abnormality emergency NMK Nknk Nkok NKPK#$%&*+ Nkqk #$%&*+#,%&- ./0123145&6789#$%&=?@. !# Sknk Skok #$% +,-.Ü TK= Uknk Ukok Ukpk Ukqk Vkok NMK= Nmknk = NMKOK= $%&*+,-./01 #$%&*+QMã NMKPK=L NMKQK= Ãã ! k·ãLâÖJÅã #$%&#*#%+, -. !*# NMKRK= NMKSK= #$%& *+& 012345678 .#$%&*+,-./0 1$%#234 NNK= NNKNK= NNKOK= NNKPK= Rsrv #$% +,-./012 NRO #$% +,-./0/12`kQN =EqRF= !# $%&*+ NNKQK= Vwt NOKNK= NOKOK= NOKPK= EptNF EibaF NOKQK= Nokrk `ççäáåÖ EÉ~íáåÖ NMK Nknk Nkqk #$%&!*+ Sknk Skok TK= Ukok Ukpk Ukqk Vkok NMK= NMKOK= #$%&*+QMã NMKPK=L NMKQK= #$%&#*#%+, -. !*# NMKRK= NMKSK= #$%& *+& 012345678 .#$%&*+,-./0 1$%#234 NNK= NNKOK= NNKPK= #$% +,-./012 NRO #$#%&* +,-./0123456 =EqRF= !# $%&*+ NNKQK= NOK= NOKPK= EptNF EibaF NOKQK= Nokrk WT02922X02