REV Midwest Automotive Design American Coach Patriot 2022, Owner'S Manual

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A M E R I C A N C O A C H P A T R I O T O W N E R ’ S M A N U A L
A M E R I C A N C O A C H // P A T R I O T S E C T I O N 1 3 // 1 4 1
To maintain heating efficiency, ESPAR recommends these periodic
maintenance steps, which should be performed by a qualified
technician� We do not recommend these steps be completed by the
owner / operator�
Have the technician refer to the AIRTRONIC D2 / D4 / D4+ Operating
Instructions and Service Book�
The technician should follow these
procedures to ensure reliable performance:
STEP 1
Remove the glow pin and inspect for carbon build up�
Clean or replace as necessary� (See glow pin and
screen inspection);
STEP 2
Remove the glow pin screen and inspect for carbon
build up� If build up is excessive, replace screen�
(See glow pin and screen inspection);
STEP 3
Make sure vent hole is open� ESPAR recommends the
use of non-detergent 100% volatile carburetor cleaner
sprayed with an air gun to help remove loose carbon
from the glow pin chamber� (See glow pin and screen
inspection);
STEP 4
Inspect the ducting, the air intake screen and air
outlet for restriction or blockage� Clean and clear
contamination as necessary;
STEP 5
Inspect combustion air intake and exhaust for
blockage� Clean and remove any contamination as
necessary;
STEP 6
Operate the heater for a minimum of 20 minutes each
month; and,
STEP 7
Maintain your batteries and all electrical connections
in good condition. With insufficient power the heater
will not start� Low and high voltage cutouts will shut the
heater down automatically�
GLOW PIN AND SCREEN INSPECTION
These procedures should only be performed by a qualified
technician� We do not recommend these steps be completed by the
owner / operator�
To gain access to inspect / replace the glow pin, glow pin screen, and the
vent hole,
have the service technician follow these procedures:
STEP 1
Remove the AIRTRONIC cover by unlocking both seal
plates� Then lift the cover and pull it away from the
housing;
STEP 2
Remove the control unit by unscrewing the fastening
screw and pressing the control unit retaining brackets
together;
STEP 3 Lift the control up and out;
STEP 4
Unclip the lines from the holder of the control unit
(Label the positions of the lines);
STEP 5 Remove the bushing from the outer case assembly;
STEP 6 Disconnect the control unit from the controller;
STEP 7
Disconnect the connector of the glow pin harness from
the control unit;
STEP 8
Remove the rubber grommet and use the special tool
(SW 12) to unscrew the glow plug (the special tool is
included with the glow pin);
STEP 9
When the glow pin has been removed, check the
screen of the support in its installed state for any
contamination� The screen must be replaced if the
surface is covered with carbon;
STEP 10
Pull the screen out of the support with pointed pliers�
Blow out the support with compressed air;
STEP 11
Use the special tool (included with the new screen) to
install the new screen� Push the screen onto the tool,
while watching the position of the recess� The recess
must be positioned at right angles (90°) to the axis of
the heater;
STEP12
Push the tool with the screen carefully as far as it will
go, ensuring that the bore for the glow plug ventilation
is free;
STEP 13
Install the glow pin using special tool (SW 12) and
torque it to 53.1in-lbs (6 Nm);
STEP 14
Reconnect the connector of the glow pin cable
harness to the control unit;
STEP 15 Install rubber grommet into the base;