Section 9. Evacuation; Section 10. Service Valves - Trane 5TTR3018-060 Installation And Operation Manual

Section 9. Evacuation

9.1 Evacuate the Refrigerant Lines and Indoor Coil
Important: Do not open the service valves until
the refrigerant lines and indoor coil leak check
and evacuation are complete.
STEP 1 - Evacuate until the micron gauge reads
no higher than 350 microns, then close off the
valve to the vacuum pump.
STEP 2 - Observe the micron gauge. Evacuation
is complete, if the micron gauge does not rise
above 500 microns in one (1) minute and 1500
microns in ten (10) minutes.
Once evacuation is complete, blank off the
vacuum pump and micron gauge, and close the
valve on the manifold gauge set.

Section 10. Service Valves

10.1 Open the Gas Service Valve
Important: Leak check and evacuation must be
completed before opening the service valves.
NOTE: Do not vent refrigerant gases into the
atmosphere.
STEP 1 - Remove valve stem cap.
STEP 2 - Using an adjustable wrench, turn valve
stem 1/4 turn counterclockwise to the fully open
position.
STEP 3 - Replace the valve stem cap to prevent
leaks. Tighten finger tight plus an additional 1/6
turn.
10.1 Open the Liquid Service Valve
!
WARNING
SERVICE VALVES!
Failure to follow this warning will result in abrupt
release of system charge and may result in per-
sonal injury and/or property damage. Extreme
caution should be exercised when opening the
Suction and Liquid Line Service Valve. Turn
valve stem counterclockwise only until the stem
contacts the rolled edge. No torque is required.
Important: Leak check and evacuation must be
completed before opening the service valves.
STEP 1 - Remove service valve cap.
STEP 2 - Fully insert 3/16" hex wrench into the
stem and back out counterclockwise until valve
stem just touches the rolled edge (approximately
five (5) turns.)
STEP 3 - Replace the valve cap to prevent leaks.
Tighten finger tight plus an additional 1/6 turn.
10
0350
Microns
ON OFF
1 MIN.
1/4 TURN ONLY
CAP
COUNTERCLOCKWISE
FOR FULL OPEN
POSITION
VALVE STEM
UNIT SIDE
OF VALVE
PRESSURE TAP PORT
GAS LINE CONNECTION
Cap
Unit Side
3/16" Hex Wrench
of Service
Valve
Rolled Edge to
Captivate Stem
Service Port
Hex Headed
Valve System
18-AC127D1-1A-EN