User guide

SECTION 3. INSTALLATION
3-21
PROHEAT
PREHEAT
ON
GREEN - ON SIGNAL STANDARD MODE 12V/24V
PCM MUST HAVE THE
AUXILIARY INPUT FEATURE
B
ON SIGNAL PREHEAT MODE 12V/24V INPUT
SWITCH INPUT
A
(+) RED POWER 12V/24V OUTPUT
(-) BLACK - GROUND
(+) WHITE - INDICATOR LAMP 12V/24V OUTPUT
C
D
B
AUXILIARY INPUT
ON SIGNAL SUPPLEMENTAL MODE 12V/24V INPUT
A
MECHANIC'S DISABLE
SWITCH
PROHEAT
PREHEAT
OFF
B
SPRING CENTERED
DOUBLE THROW
MOMENTARY SWITCH.
C A
12/24V
ENGINE SIGNAL
START SWITCH
(MOMENTARY CONTACT,
NORMALLY OPEN)
F A C
STOP SWITCH
(MOMENTARY CONTACT,
NORMALLY OPEN)
PREHEAT MODE OPTION 1
PUSH BUTTON
START/STOP SWITCH
(+) WHITE - INDICATOR LAMP 12V/24V OUTPUT
GREEN - ON SIGNAL STANDARD MODE 12V/24V
(+) RED POWER 12V/24V OUTPUT
SWITCH INPUT
C
D
(-) BLACK - GROUND
A
B
PROHEAT TIMER
OPTIONAL
BACKLIGHT TO KEYSWITCH
GREY WHITE GREEN BLACK
RED
PREHEAT MODE OPTION 2
SUPPLEMENTAL MODE STANDARD MODE OPTION 1
INDICATOR LIGHT
(+) (-)
STANDARD MODE OPTION 2
PROHEAT SWITCH AND
INTERNAL INDICATOR
LIGHT
DEALER/OEM. TO SUPPLY
DEALER/OEM. TO SUPPLY
24 VOLT
COMMINICATION
CAN Bus RS232 &
999400
POWER
AUXILIARY INPUT SWITCH INPUT
G-III SOFT START
PROHEAT CONTROL MODULE
POWER
Coolent Heater
Bus Applications
Approved forUse in
Requirements
Diesel FueledVechicle
This Product Meets
FHWA Bus Heater
WASH
FUSE 15A
DO NOT
Protected by US Patents
5,878,950 and 6,082,625
TIME
CLOCK
MANUAL
DAY
TIMER
Figure 3-29 Preheat and Supplemental Wiring Diagram.
See page 3-13 for wiring