Installation and Maintenance Manual

Unit Start-Up Procedures
RLC-SVX09H-EN 175
Figure 78. RTWD Stopped to starting
Enforce Restart
Inhibit Timer
(0 to 30 mins)
Confirm Condenser
Water Flow
(6 Second Filter)
RTWD Sequence of Operation Stopped to Starting
Stopped
Or
Run
Inhibit
Chiller Mode Set to Auto
Auto
Waiting
to Start
Energize Evaporator Water Pump Relay
Energize Condenser Water Pump Relay
Confirm Evaporator Water Flow Within 20 minutes (6 Sec Filter)
Confirm Condenser Water Flow Within 20 minutes (6 Sec Filter)
Waiting
to Start
Oil Heaters Always Energized When Respective Compressors Are De-Energized
Confirm Evaporator
Water Flow
(6 Second Filter)
Energize Unload Solenoid
Confirm
Presence of Oil
(0 to 2 mins)
Waiting
to Start
Condenser
Water Pump
Pre-Run
Waiting
to Start
Enforce 'Cond
Pmp Strt Delay'
(0 to 300 Sec)
(adj 0 to 30
mins)
Enforce 'Cprsr
Strt Delay'
(0 to 300 Sec)
Waiting
to Start
Call for Cooling (adj Differential to Start is met)
Pre-Position EXV of Lead Circuit
Start Command to Lead Cprsr*
* Lead Compressor (and its lead circuit) determined by staging algorithm and “fixed staging” or “balanced wear” selection. If “balanced wear” then compressor with least wear (10* starts + hours) is lead. If “fixed staging” Cprsr 1A is always lead and Cprsr 2A is always lag. Staging order is also influenced by lockouts, restart inhibit, or diagnostics present and will also obey priority staging rule: Any cprsr running but not step loaded, has priority to either step load or to unstage (turn off).
Energize Unload Solenoid of Lead Cprsr
Energize Oil Return Fill Solenoid of Lead Circuit
EXV stroke
to
Preposition
Waiting
to Start