Installation and Maintenance Manual

Unit Start-Up Procedures
172 RLC-SVX09H-EN
Figure 76. RTWD Power up to starting
Enforce Restart
Inhibit Timer
(0 to 5 mins)
Confirm
Condenser
Water Flow
RTWD Sequence of Operation Power Up to Starting Compressor
Power
Applied
Last Mode Was Auto
Auto
Call for Cooling (adj Differential to Start is met)
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 Heater always energized when compressor is de- energized
Confirm Evaporator
Water Flow
(6 Second Filter)
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'
Waiting
to Start
(0 to 300 Sec)(6 Second Filter)
Power
Up
CH530
Boot Time
(30 to 40 Sec)
Enforce Power Up
Start Delay Timer
(adj 0 to 30 mins)
Re-calibrate EXV (overdrive closed and then to 50%)
* Lead Compressor (and its lead circuit) is determined by staging algorithm – “fixed staging” or “balanced wear” selection - also influenced by lockouts, restart inhibit, or diagnostics present
Confirm
Presence of Oil
(0 to 2 mins)
Energize Unload Solenoid
Pre-Position EXV of Lead Circuit
Energize Unload Solenoid of Lead Cprsr
Energize Oil Return Fill Solenoid of Lead Circuit
EXV stroke
to
Preposition
Waiting
to Start
Start Command to Lead Cprsr*