INSTALLATION MANUAL
Refrigeration unit
Zero Z120b
rev.01
3.6 Evaporator installation ..................................................................................... 29
3.7 Piping connection ............................................................................................ 30
3.7.1 Connection diagram ............................................................................. 31
3.8 Check for system leaks and vacuum ............................................................... 32
3.9 Electrical connections ...................................................................................... 34
3.9.1 Diagram of electrical connections ......................................................... 34
3.9.2 Device connection ................................................................................ 35
3.9.3 Battery connection ................................................................................ 36
3.9.4 Sub-key fuse installation kit .................................................................. 37
3.9.5 Discharge heater installation ................................................................ 38
3.10 Condenser drain hoses installation .................................................................. 39
3.11 In-cab controller installation ............................................................................. 40
3.12 External power supply mode connection socket installation ............................ 41
3.13 Loading the system ......................................................................................... 42
3.14 Suction pressure regulator valve (CPR) .......................................................... 43
3.14.1 Adjusting the CPR valve ....................................................................... 44
3.15 Expansion valve .............................................................................................. 45
3.15.1 Expansion valve adjustment. ................................................................ 45
3.16 Heating kit (optional) ........................................................................................ 47
3.16.1 Operating logic ..................................................................................... 47
3.16.2 Components ......................................................................................... 47
3.16.3 Installation ............................................................................................ 47
3.16.4 Cooling diagram with installed heating kit ............................................. 48
3.16.5 Wiring diagram with the heating kit installed ......................................... 49
3.17 Final checks..................................................................................................... 50
4 Appendix ................................................................................................ 51
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