Specifications

D-1000B Heater Operations & Maintenance
5.4.8 Removal and Installation of Fuel Nozzle
5.4.8.1 Removal procedures:
1. Disconnect power cord from power source and allow heater to cool.
2. Remove four quick release pins and remove top cover (see Figure 5-1).
3. Using a 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. Disconnect ground wire (103) from terminal lug (94) on combustion head (40).
5. Using a 13mm open end wrench, loosen and removed fuel feed hose (65) from nozzle holder (60).
6. Disconnect photocell lead (66), gently pulling straight back from flame detector holder (93).
7. Disconnect both H.T. ignition cables (64) from electrodes (63).
8. Rotate burner flange (61) counter-clockwise to align tabs with slots on the burner flange. Remove burner flange
(61) from combustion head (40).
9. Using a 19mm open end wrench, hold Nozzle holder (60) and with a 15mm open end wrench remove nozzle (59).
To Ground Terminal Board
91
94
40
103
91
61
63
85
64
62
65
66
93
60
59
Figure 5-9 – Burner Head & Nozzle Assembly
5.4.8.2 Installation procedures:
1. Install the new nozzle (59) into nozzle holder (60).
2. Using a 19mm open end wrench, hold nozzle holder (60) and with a 15mm open end wrench tighten nozzle (59).
3. Align slots in burner flange (61) with tabs on the combustion head (40). Rotate burner flange (61) clockwise to
lock tabs.
4. Reconnect H.T. ignition cables (64) to both electrodes (63).
5. Reconnect photocell lead (66) into flame detector holder (93) by aligning rubber tab on photocell lead with slot in
of the flame detector holder, 3 o’clock position. Ensure photocell lead is seated.
6. Reconnect and tighten fuel feed hose (65) to the nozzle holder (60) using a 13mm open end wrench.
MAINTENANCE, and REPAIR PROCE
DURES 5-12 DHS SYSTEMS LLC
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