ContentS
1 - SAFetY ConSIDeRAtIonS ............................................................................................................................................... 4
2 - IntRoDUCtIon ..................................................................................................................................................................... 6
.1 - Light emitting diodes on boards ............................................................................................................................................. 6
. - Abbreviations and explanations ............................................................................................................................................. 6
.3 - Control panel ............................................................................................................................................................................ 7
.4 - Variable Frequency Drive (VFD)........................................................................................................................................... 7
.5 - Refrigeration cycle ................................................................................................................................................................... 8
.7 - Unit-mounted VFD .................................................................................................................................................................. 9
.8 - VFD cooling cycle .................................................................................................................................................................... 9
.9 - Lubrication cycle ...................................................................................................................................................................... 9
3 - ContRoLS .............................................................................................................................................................................. 11
3.1 - Definitions ............................................................................................................................................................................... 11
3. - General .................................................................................................................................................................................... 11
3.3 - PIC III system components ................................................................................................................................................... 11
4 - ICVC opeRAtIon AnD MenUS ..................................................................................................................................... 13
4.1 - General .................................................................................................................................................................................... 13
4. - Alarms and alerts.................................................................................................................................................................... 14
4.3 - ICVC menu items ................................................................................................................................................................... 14
5 - pIC III SYSteM FUnCtIonS ............................................................................................................................................. 33
5.1 - Capacity control ..................................................................................................................................................................... 33
5.3 - Occupancy schedule .............................................................................................................................................................. 35
5.4 - Safety controls ........................................................................................................................................................................ 36
5.5 - Shunt trip ................................................................................................................................................................................ 36
5.6 - Default screen freeze ............................................................................................................................................................ 36
5.7 - Ramp loading control ............................................................................................................................................................ 38
5.8 - Capacity override (Table 6) ................................................................................................................................................. 39
5.11 - Oil cooler .............................................................................................................................................................................. 39
5.1 - Remote start/stop controls .................................................................................................................................................. 40
5.14 - Alarm (trip) output contacts .............................................................................................................................................. 40
5.15 - Kilowatt output..................................................................................................................................................................... 41
5.16 - Remote reset of alarms ........................................................................................................................................................ 41
5.17 - Condenser pump control .................................................................................................................................................... 41
5.18 - Condenser freeze prevention ............................................................................................................................................. 41
5.19 - Evaporator freeze protection ............................................................................................................................................. 41
5.0 - Tower fan relay low and high .............................................................................................................................................. 41
5. - Water/brine reset .................................................................................................................................................................. 4
5.3 - Surge prevention algorithm ................................................................................................................................................ 43
5.4 - Surge protection ................................................................................................................................................................... 43
5.6 - Lead/lag control ................................................................................................................................................................... 44
5.8 - Ice build control ................................................................................................................................................................... 47
5.30 - Service operation .................................................................................................................................................................. 49