D-1000B Heater
Operations & Maintenance
NOTE!
In the following Repair Procedures, the numbers in parentheses refer to item
numbers listed in Chapter 8, Illustrated Parts Breakdown diagram on page 8-1 or
otherwise noted.
5.4.2 Removal and Installation Electric Motor Assembly
5.4.2.1
Removal procedures:
1. Disconnect power cord and allow heater to cool.
2. Remove the four quick release pins as shown in Figure 5-1; remove top exterior cover.
3. Using an 8mm nut driver, remove the upper heat shield (05) by removing six screws (79) and two sheet metal
screws (78). Remove heat shield and set aside.
4. Using a 4mm Allen wrench, loosen set screw (92) and remove fan blade (15).
5. Disconnect the three wires from the fuel solenoid (71).
6. Using a 15mm open end wrench, loosen and disconnect the fuel supply line (22B) from fuel filter and fuel return
line (22A) to the fuel tank at the fuel pump (70) (see Figure 5-6).
7. Using a 13mm open end wrench, loosen and disconnect the fuel feed hose (65) at the fuel pump to the burner
head (61).
8. Using a 2.5mm Allen wrench, loosen (
DO NOT REMOVE
) three set screws on the fuel pump collar to the back of
the electric motor; remove fuel pump (70) from electric motor (10).
9. Using a Phillips screwdriver, loosen and remove two control panel mounting screws (81); pull out the control
panel assembly (29) from the base (30) to expose the terminal boards.
10. Trace the electric motor power harness (black covered (white, black and yellow with green stripe wire) into control
panel. Disconnect and remove three wires; white wire (#5), black wire (#6) from the terminal board (47), and the
yellow and green stripe ground wire from the small terminal board (46) as shown in Figure 5-2.
#5
White Wire
#6
Black Wire
Ground Wire
Figure 5-2 – Control Panel Terminal Board
MAINTENANCE, and REPAIR PROCEDURES
5-3
DHS SYSTEMS LLC
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