Trane CCAF User Manual

CGWF-SVX01A-EN 79
Unit Start-up
Unit Power Up
Checking Operating Conditions
Once the unit has been operating for about 10 minutes and the system has stabilized,
check operating conditions and complete the checkout procedures that follow.
• Recheck evaporator water and condenser (CGWF) water flows and pressure
drops. These readings should be stable at proper levels.
• Check suction pressure and discharge pressure of the unit.
Discharge pressures - take at discharge line service valve backseat port. Normal dis-
charge pressures are:
CCAF units 200 to 360 psig
CGWF units 175 to 275 psig
Suction pressures - take at Schraeder fitting provided on the suction line. Normal suc-
tion pressures are:
40-60 F LWT = 50-85 psig
15-39 F LWT = 25-50 psig.
• Check compressor oil levels. At full load, oil level should be visible in the oil level
sight glass on the compressor. If it is not, add or remove oil as required.
• Check the liquid line sight glasses. Refrigerant flow past the sight glasses should
be clear. Bubbles in the liquid line indicate either low refrigerant charge or exces-
sive pressure drop in the liquid line. Such a restriction can often be identified by a
noticeable temperature differential on either side of the restricted area. Frost
often forms on the outside of the liquid line at this point also.
Figure 23 Unit Power UP
Enforce Restart
Inhibit Timer
Chiller
Level
Power Applied
to CH530
Lead
Circuit
Running
Auto
Lag
Circuit
Auto
(Power
Up Start
Delay)
Auto
Energize
Evaporator Water
Pump Relay
Running
Energize
Condenser Water
Pump Relay
Call for Cooling
Confirm Evaporator
Water Flow
Confirm Condenser
Water Flow
Energize
Cprsr A
Auto
Waiting to
Start
Auto Auto
Open Liquid Line
Solenoid Valve
(6 to 1200 Sec)
(6 to 1200 Sec)
(0 to 5 Mins)
CH530 Boot Time
(24 to 42 Sec)
Enforce Power Up
Start Delay Time
(0 to 600 Sec)
Auto

Trane CCAF Specifications

General

Brand	Trane
Model	CCAF
Category	Chiller
Language	English