11-1 Wiring Schematics
450 LXi
Owner Manual
~ 11-1-79 ~
Rev. “C”
Wiring Schematic 0086778 - Engine, Dash, Webasto Heating System - Page 1 of 2
RK
01/17/05
2
1
FULL
M450
0086778
BT
11/09/04
13131F
SCHEMATIC, WEBASTO,HEATING,ENGINE,DASH
INACTIVATES NOS.
LET.
WAS
REVISIONS
DR.
APP.
CCN
SCALE
BLUE BIRD CORPORATION
FORT VALLEY GEORGIA, U.S.A.
CCN
DR.
APP.
BY
BY
D
PAGE
__OF__
1
2
3
4
5
A
B
C
D
E
F
G
H
6
7
CONFIDENTIAL
The information hereon is confidential
business information and may not be copied
or used for any purpose unless permission
is expressly granted in writing by
Blue Bird Body Company.
Copyright 2002
Blue Bird Body Company
All rights reserved
60 PSI
PRESSURE
REGULATOR
CITY
WATER
FILTER
FRESH WATER
TANK
120 GALLONS
5.6 GPM
VARIABLE
SPEED
12VDC
MANABLOC
FRESH WATER
MANIFOLD
COLD WATER
MANIBLOC
HOT WATER
MANIBLOC
ASSY
ASSY
120F°
TEMPERING
VALVE
COLD
HOT
120F°
HOT
180F°
COLD
HOT
COLD
HOUSE
PLUMBING
PLUMBING
HOUSE
10 GALLON
WATER
HEATER
ATWOOD
170F°
OVER-
TEMP
1.4KW
HEAT
ELEMENT
120VAC
24V
140F°/
T-STAT
RETURN
MANIFOLD
1
GALLON
CAPACITY
120-140F°
HOT
COLD
0.3 GALLON CAPACITY
SUPPLY MANIFOLD
120F°
T-STAT
FRESH WATER
PUMP
CIRCULATION
PUMP
CONVECTOR
SUPPLY
MANIFOLD
0.6
GALLON
CAPACITY
WEBASTO
COOLANT
HEATER
80,000 BTU
MAIN
ENGINE
DASH
HVAC
UNIT
DASH
10K
LIVING
10K
ROOM
KITCHEN
10K
5K
BATHROOM
10K
BAY 1
5K
10K
BEDROOM
5K
BAY 4
LAVATORY
PRIVATE
BAY 2
5K
FILL
DRAIN
DRAIN
DRAIN
AIR PURGE
FILL
(0-120PSI)
LEVEL
SENSOR
80,000 BTU
HEAT EXCHANGER
COLD
WEBASTO
U-4852
24VDC/8.7A
26.4GPM
0-75psi
60-320F°
TEMP &
PRESSURE
GAUGE
COOLANT FLOW
WHEN ENGINE
OPERATIONAL.
FRESH WATER
FRESH WATER
COOLANT
COOLANT
COOLANT
COOLANT
COOLANT
HEAT
VALVE
WEBASTO
CONVECTOR COOLANT
ONLY CIRCULATES
WHEN A THERMOSTAT
COMMANDS HEAT.
MAXIMUM HOT
WATER HEATER
WATER TEMPERATURE
IS 140F.
COOLANT FLOW IS
STOPPED WHEN WATER
TEMPERATURE REACHES
140F.
PROVIDES HEAT
ONLY WHEN
ENGINE IS
OPERATIONAL.
FRESH WATER
AUTO-
FILL
SHUTOFF
PLUMBING
180F°
180F°
180F°
180F°
180F°
F23
5A
BAY
MUX
PANEL
CB7-B
AC PANEL1
WATER
HEATER
VALVE
V5
V4
P1
V3
V2
V1
V6
V7
V8
V9
V10
V11
P2
V13
V12
V14
V15
V17
V16
OPTICAL
12V
1
2
BAY
BLK16
3
1
BAY
BLK16
2
FRESH WT FILL VAL +A
FRESH WT FILL VAL -A
WATER LEVEL SIG
WATER LEVEL-
WATER LEVEL+
COOLANT
2
1
BAY
BLK17
WATER PUMP+A
WATER PUMP-
WEBAS HT VAL+
WEBAS HT VAL SIG
5
6
BLK13
WEBASTO HEAT VALVE
THEN ALLOWS COOLANT
TO FLOW.
COOLANT
SEE NOTE 1 FOR FRESH
WATER FILL PROCEDURE.
REFER TO NOTE 2.
120F°
140F°/
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