PREVOST X3-45 2016, Maintenance Manual

Page: 399 / 459

SECTION 22: HEATING AND AIR CONDITIONING
PA1593
1
CONTENTS
1. HEATING AND AIR CONDITIONING ................................................................................................... 4
2. AIR CIRCULATION WITH CENTRAL HVAC SYSTEM ....................................................................... 4
2.1 D
RIVER
’
S
A
REA
................................................................................................................................. 4
2.2 P
ASSENGERS
’ A
REA
.......................................................................................................................... 4
3. CENTRAL HVAC SYSTEM OPERATION ............................................................................................ 5
3.1 D
RIVER
’
S
S
ECTION
O
PERATION
......................................................................................................... 5
3.2 P
ASSENGERS
’ S
ECTION
O
PERATION
.................................................................................................. 6
4. HVAC UNIT MAINTENANCE ................................................................................................................ 7
4.1 C
OIL
C
LEANING
................................................................................................................................. 7
4.2 D
RIVER
'
S SECTION
A
IR
F
ILTERS
......................................................................................................... 8
4.3 P
ASSENGERS
’ S
ECTION
A
IR
F
ILTER
................................................................................................... 9
4.4 O
VERHEAD
C
OMPARTMENT
F
AN
A
IR
F
ILTER
....................................................................................... 9
5. HVAC SYSTEM PARTICULARITIES, TESTING AND TROUBLESHOOTING ................................... 9
5.1 H
VAC
S
YSTEM
A
ND
T
EST
M
ODE
F
OR
S
WITCHES
A
ND
S
ENSORS
......................................................... 9
5.2 H
VAC
S
YSTEM
A
ND
T
EST
M
ODE
F
OR
E
LECTRIC
M
OTORS
................................................................. 10
5.3 P
ARTICULARITIES
............................................................................................................................ 10
5.4 H
VAC
S
YSTEM
T
ROUBLESHOOTING
.................................................................................................. 11
6. CENTRAL AIR CONDITIONING SYSTEM ......................................................................................... 12
6.1 A/C
CYCLE
..................................................................................................................................... 12
6.2 R
EFRIGERANT
................................................................................................................................. 13
6.2.1 Procurement .......................................................................................................................... 13
6.2.2 Precautions in Handling Refrigerant ..................................................................................... 13
6.2.3 Treatment in Case of Injury ................................................................................................... 13
6.2.4 Precautions in Handling Refrigerant Lines ............................................................................ 13
6.3 P
UMPING
D
OWN
............................................................................................................................. 16
6.4 A
DDING
R
EFRIGERANT
(V
APOR
S
TATE
) ............................................................................................ 17
6.5 E
VACUATING
S
YSTEM
..................................................................................................................... 17
6.5.1 Double Sweep Evacuation Procedure .................................................................................. 17
6.6 C
HARGING
S
YSTEM
......................................................................................................................... 18
6.7 R
EFRIGERANT
S
YSTEM
C
LEAN
-
OUT
A
FTER
C
OMPRESSOR
F
AILURE
................................................... 19
6.7.1 Determining Severity of Failure ............................................................................................. 19
6.7.2 Clean-out after Minor Compressor Failure ............................................................................ 19
6.7.3 Clean-out After Major Compressor Failure ........................................................................... 19
7. CENTRAL A/C SYSTEM COMPONENTS .......................................................................................... 20
7.1 C
OMPRESSOR
(C
ENTRAL
S
YSTEM
) .................................................................................................. 20
7.1.1 Belt Replacement .................................................................................................................. 20
7.1.2 Belt Tension Adjustment ....................................................................................................... 21
7.1.3 Pulley Alignment .................................................................................................................... 21
7.1.4 Longitudinal Compressor Alignment ..................................................................................... 21
7.1.5 Horizontal Compressor Alignment ........................................................................................ 21
7.1.6 Vertical Compressor Alignment ............................................................................................. 21
7.1.7 Compressor Maintenance ..................................................................................................... 22
7.1.8 Troubleshooting Guide .......................................................................................................... 22
7.2 M
AGNETIC
C
LUTCH
......................................................................................................................... 23
7.3 E
VAPORATOR
M
OTOR
..................................................................................................................... 23
7.3.1 Removal ................................................................................................................................ 23
7.3.2 Installation ............................................................................................................................. 23