Carrier 38EYX Installation And Start-Up Instructions Manual page 5

ACCESSORY
Crankcase Heater
Evaporator Freeze Thermostat
Compressor Start Assist—Capacitor and Relay
Puron® Low-Ambient Pressure Switch
Wind Baffle
Support Feet
Hard Shutoff TXV
Liquid-Line Solenoid Valve for Heating
* For tubing line sets between 50 (15) and 175 ft (53 m), or when vertical difference is greater than 20 ft (6 m), refer to Application Guideline and Service Manual —
Residential Split-System Air Conditioners and Heat Pumps Using Puron®.
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0 1 2
MINUTES
Fig. 7—Deep Vacuum Graph
1. Pump system down to 28 in. (71 cm) of mercury and allow
pump to continue operating for an additional 15 minutes.
2. Close service valves and shut off vacuum pump.
3. Connect a nitrogen cylinder and regulator to system and open
until system pressure is 2 psig (14 KPa).
4. Close service valve and allow system to stand for 1 hr. During
this time, dry nitrogen will be able to diffuse throughout the
system absorbing moisture.
5. Repeat this procedure as indicated in Fig. 8. System will then
be free of any contaminants and water vapor.
FINAL TUBING CHECK
IMPORTANT: Check to be certain factory tubing on both indoor
and outdoor unit has not shifted during shipment. Ensure tubes are
not rubbing against each other or any sheet metal. Pay close
attention to feeder tubes, making sure wire ties on feeder tubes are
secure and tight.
Step 10—Make Electrical Connections
To avoid personal injury or death, do not supply power to unit
with compressor terminal box cover removed.
Be sure field wiring complies with local and national fire, safety,
and electrical codes, and voltage to system is within limits shown
on unit rating plate. Contact local power company to correct
improper voltage. See unit rating plate for recommended circuit
protection device.
Table 2—Accessory Usage
LEAK IN
SYSTEM
VACUUM TIGHT
TOO WET
TIGHT
DRY SYSTEM
3 4 5 6 7
A95424
A95424
REQUIRED FOR LOW-AMBIENT
APPLICATIONS
(BELOW 55°F/13°C)
Yes
Yes
Yes
Yes
See Low-Ambient Instructions
Recommended
Yes
No
BREAK VACUUM WITH DRY NITROGEN
BREAK VACUUM WITH DRY NITROGEN
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
Fig. 8—Triple Evacuation Method
DISCONNECT PER
IEC AND/OR
LOCAL CODES
FIELD POWER
WIRING
L1
L2/N
L3
GND
Fig. 9—Line Power Connections
NOTE: Operation of unit on improper line voltage constitutes
abuse and could affect unit reliability. See unit rating plate. Do not
install unit in system where voltage or phase imbalance (3-phase)
5
REQUIRED FOR LONG-LINE
APPLICATIONS*
(OVER 50 FT/15 M)
Yes
No
Yes
No
No
No
Yes
See Long-Line
Application Guideline
EVACUATE
WAIT
EVACUATE
WAIT
EVACUATE
CHARGE SYSTEM
CONTACTOR
L1
N FOR 1-PHASE ONLY
L2/N
3-PHASE ONLY
L3
GROUND
LUG
A95425
A03226