[Representative] LG Electronics Inc. EU Representative
Krijgsman 1, 1186 DM Amstelveen, The Netherlands
[Manufacturer] LG Electronics Inc. Changwon 2nd factory
84, Wanam-ro, Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA
Page 1: ...ODELS PRHR Series Heat Recovery Unit Original instruction Please read this installation manual completely before installing the product Installation work must be performed in accordance with the national wiring standards by authorized personnel only Please retain this installation manual for future reference after reading it thoroughly ...
Page 2: ...2 HR Unit PRHR Series Heat Recovery Unit Manual TABLE OF CONTENTS Safety Precautions 3 Features 4 Installation Part 4 Installation 5 Coil Exchanging Method 13 ...
Page 3: ...ere is risk of fire electric shock explosion or injury Do not damage or use an unspecified power cord There is risk of fire electric shock explosion or injury Do not touch the power switch with wet hands There is risk of fire electric shock explosion or injury Avoid a place where rain may enter since the HR unit is for indoor There is risk of property damage failure of product or elec tric shock I...
Page 4: ...h Sound Absorbing Insulation Material Current Minimum circuit Amps MCA Maximum fuse Amps MFA Power Supply PRHR021 PRHR031 PRHR041 16 24 32 8 8 8 26 40 40 26 40 40 18 20 22 39 7 44 1 48 5 801x218x617 801x218x617 801x218x617 31 5x8 6x24 3 31 5x8 6x24 3 31 5x8 6x24 3 Galvanized steel plate Ø9 52 3 8 Ø15 88 5 8 Ø9 52 3 8 Ø12 7 1 2 Ø15 88 5 8 Ø22 2 7 8 Ø28 58 1 1 8 Ø28 58 1 1 8 Ø19 05 3 4 Ø22 2 7 8 Ø22...
Page 5: ...ual to reducer s dimension Selection of the best location Dimensional drawings Inspection door servicing space 481 345 453 174 218 182 60 30 182 174 419 61 137 124 450 450 300 more Servicing space 300 more Servicing space 450 more Servicing space 300 more Servicing space 7 1 2 3 6 4 5 100 more 100 more Servicing space Servicing space 100 more Servicing space 100 more 100 more Servicing space Servi...
Page 6: ...ion bolts HR Unit Installation CAUTION Tighten the nut and bolt to prevent unit falling Six sided Nut M10 or M8 Hanger metal Hanger metal Hanger metal Flat washer Flat washer Flat washer M10 Suspension bolt M10 or M8 A 1 Using an insert hole in anchor hang the suspension bolt 2 Install a hexagon nut and a flat washer locally procured to the suspension bolt as shown in the figure in the bottom and ...
Page 7: ...Gas pipe Ø15 88 Liquid pipe Ø9 52 Brazing Type Liquid pipe Liquid pipe Low pressure gas pipe Low pressure gas pipe High pressure gas pipe High pressure gas pipe Liquid pipe Low pressure gas pipe High pressure gas pipe Brazing Type CAUTION Whenever connecting the indoor units with the HR unit install the indoor units in numerical order from No 1 Ex In case of installing 3 indoor units No 1 2 3 O No...
Page 8: ...pes as shown in the Figure Not connected pipe Always seal up the tip of unused pipe by brazing Thermal insulator for refrigerant pipe Local supply Make sure that there is no clearance here Connect the wires to the terminals on the control board individually according to the outdoor unit connection Ensure that the color of the wires of outdoor unit and the terminal No are the same as those of HR Un...
Page 9: ...FF SW02M 1 Selection of the method for addressing valves of an HR unit Auto Manual Auto Manual Switch No 1 On Switch No 1 Off h Each model is shipped with the switches No 2 and No 3 pre adjusted as above in the factory Zoning setting ON 1 2 3 1 2 1 3 2 4 For 2 branches PRHR021A For 3 branches PRHR031A For 4 branches PRHR041A Initial Setting 1 branch Connected 2 branches Connected 3 branches Connec...
Page 10: ...o use a PRHR041 for 2 branches HR unit after closing the 3rd and 4th pipes set the dip switch for 2 branches HR unit The unused port must be closed with a copper cap not with a plastic cap 2 SW05M Rotary S W for addressing HR unit Must be set to 0 when installing only one HR unit When installing multiple HR units address the HR units with sequentially increasing numbers starting from 0 Maximum 16 ...
Page 11: ...er ently at its wired remote control S W No Setup No 1 Manual addressing of valve 1 No 2 Manual addressing of valve 2 No 3 Manual addressing of valve 3 No 4 Manual addressing of valve 4 SW03M Increase in the digit of 10 of valve address SW04M Increase in the last digit of valve address SW01M SW03M SW04M Write positions of indoor units connected with each port and Central address also write rotary ...
Page 12: ...ess SW05M Rotary S W Prerequisite for manual valve addressing central control address of each indoor unit must be preset differently at its wired remote control S W No Setup No 1 Manual addressing of valve 1 No 2 Manual addressing of valve 2 No 3 Manual addressing of valve 3 No 4 Manual addressing of valve 4 SW03M Increase in the digit of 10 of valve address SW04M Increase in the last digit of val...
Page 13: ... Bypass CN12 Branch 4 High CN07 Branch 3 High CN06 Branch 2 High CN05 Branch 1 High CN04 Branch 3 Bypass CN10 Branch 2 Bypass CN09 Branch 1 Bypass CN08 Coil Exchanging Method NOTICE 1 Remove the 2 securing screws Remove the cover by pulling on the bottom of the cover and lifting up 3 Remove the 4 securing screws Lift up and pull on the cover NOTES Refer to the label concerned the solenoid coil s p...
Page 14: ...14 HR Unit ...
Page 15: ...esentative LG Electronics Inc EU Representative Krijgsman 1 1186 DM Amstelveen The Netherlands Manufacturer LG Electronics Inc Changwon 2nd factory 84 Wanam ro Seongsan gu Changwon si Gyeongsangnam do KOREA ...
