Carrier NDK33BN0KB, Operation & Service Manual

Page: 220 / 270

62-61753-21 8-8
1
2
3
4
1. Screw
2. Breather Cover 3. Breather Valve
4. Breather Tube
Figure 8-8. Engine Crankcase Breather
8.4.14 Servicing Glow Plugs
The total circuit amp draw for the glow plug circuit is
checked during a Pretrip cycle. When servicing, the
glow plug is to be fitted carefully into the cylinder head
to prevent damage to glow plug. Torque value for the
glow plug is 19 to 24 Nm (14 to 18 ft-lb).
Checking for a Defective Glow Plug
a. The entire circuit may be tested using Component
Test Mode. (Refer to Section 5.1.2.)
b. To test individual glow plugs, disconnect all glow
plugs from each other, and place an ammeter (or
clip-on ammeter) in series with each glow plug as it
is energized. See Section 2.8 for glow plug amper-
age.
8.5 REFRIGERANT SYSTEM SERVICE
8.5.1 Removing The R-404A Refrigerant Charge
To completely remove the refrigerant charge the entire
system must be "open" to the recovery system. To
open the system, place the unit in SERVICE MODE
(refer to section 5.1.3). Ensure the microprocessor
message center reads "RECOVER/LEAK CHK/EVAC
MODE" during the refrigerant recovery process.
Connect a refrigerant recovery system to the unit to
remove the refrigerant charge. Refer to Figure 8-9 and
instructions provided by the manufacture of the refrig-
erant recovery system.
9
18
1
2
3
4
5
6
7
8
11
12
13
14
15
16
17
10
1. Refrigerant Cylinder
2. Refrigerant Recovery
Unit
3. Manifold Gage Set
4. Valve
5. Vacuum Gauge
6. Vacuum Pump
7. Suction Service Valve
8. Compressor
9. Discharge Service
Valve
10. Economizer Service
Line Valve
11. Condenser
12. Evaporator
13. Compressor Suction
Modulation Valve
(CSMV)
14. Receiver
15. Liquid Line Service
Valve
16. Filter Drier
17. Economizer Heat
Exchanger
18. Unloader Solenoid
Valve (USV)
Figure 8-9. Refrigerant System
Service Connections