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Sida 1/49

Original Instructions

Public

REV

Date

04/2025

Supersedes

D-EIMHP01812-24_00EN

Installation, Operation and Maintenance Manual

Air to water heat pump units with scroll compressors

EWYE~CZ

Installation, Maintenance and Operation Manual

D-EIMHP01812-24_01EN

D-EIMHP01812-24_01EN 2/49 
CONTENTS 
 
INTRODUCTION ........................................................................................................................................................... 4 
1  Precautions against residual risks ......................................................................................................................... 4 
2  General description ............................................................................................................................................... 5 
3  Information about the refrigerant ........................................................................................................................... 6 
4  Installation information .......................................................................................................................................... 6 
RECEIPT OF THE UNIT................................................................................................................................................ 9 
STORAGE ................................................................................................................................................................... 10 
Operation limits ............................................................................................................................................................ 11 
MECHANICAL INSTALLATION ................................................................................................................................... 13 
1  Safety .................................................................................................................................................................. 13 
2  Handling and lifting .............................................................................................................................................. 13 
2.1  Lifting instructions .................................................................................................................................... 13 
2.2  Lifting the MONO unit .............................................................................................................................. 14 
2.3  Lifting the DUAL unit ................................................................................................................................ 14 
3  Positioning and assembly ................................................................................................................................... 15 
3.1  Mounting the main switch handle ............................................................................................................. 18 
4  Minimum space requirements ............................................................................................................................. 18 
5  Additional installation site requirements .............................................................................................................. 20 
6  Noise and acoustic protection ............................................................................................................................. 21 
7  Water circuit for connection with the unit ............................................................................................................. 22 
7.1  Water piping ............................................................................................................................................. 22 
7.2  Flow-switch .............................................................................................................................................. 22 
7.3  Preparing and checking the water circuit connection ............................................................................... 23 
7.4  Water pressure ........................................................................................................................................ 23 
7.5  Hydraulic diagram .................................................................................................................................... 24 
8  Water treatment .................................................................................................................................................. 25 
9  Water pressure drops for filters ........................................................................................................................... 25 
10 Pump kit mounted on board (Optional) ............................................................................................................... 25 
11 Operating stability and minimum water content in the system............................................................................. 26 
11.1 Cooling Mode ........................................................................................................................................... 26 
11.2 Heating Mode .......................................................................................................................................... 27 
12 Calibrating the expansion vessel ......................................................................................................................... 28 
13 Antifreeze protection for BPHE ........................................................................................................................... 29 
ELECTRICAL INSTALLATION .................................................................................................................................... 30 
1  General specifications ......................................................................................................................................... 30 
2  Electric connections ............................................................................................................................................ 30 
3  Cable requirements ............................................................................................................................................. 31 
3.1  Maximum cable dimension ...................................................................................................................... 31 
3.2  Safety device requirements ..................................................................................................................... 32 
4  Phase unbalance ................................................................................................................................................ 32 
OPERATOR’S REPONSIBILITIES .............................................................................................................................. 33 
MAINTENANCE .......................................................................................................................................................... 34 
1  Pressure / temperature table ............................................................................................................................... 35 
2  Routine maintenance .......................................................................................................................................... 35 
2.1  Air Heat Exchanger Maintenance ............................................................................................................ 35 
2.2  Electrical Maintenance ............................................................................................................................. 36 
2.3  Service and limited warranty .................................................................................................................... 36 
2.4  Refrigerant circuit scheme ....................................................................................................................... 39 
LIST OF THE LABELS APPLIED TO THE UNIT ......................................................................................................... 42 
COMMISSIONING ....................................................................................................................................................... 44 
IMPORTANT INFORMATION ON THE REFRIGERANT USED ................................................................................. 45 
PERIODIC CHECKS AND COMMISSIONING OF PRESSURE EQUIPMENT ........................................................... 46 
DISMISSION AND DISPOSAL .................................................................................................................................... 47 
 
 