Install fuse, (25 AMP, 32 V) if not already installed.
47. Connect fuse holder, Figure 5-10, (1) part of (2), to (+) terminal of the slave receptacle and mount on inside of bulk head
with existing hardware used to attach the slave receptacle cover chain.
49. Locate operating instruction plate (2) and heater function codes plate (3) and match and drill holes in control panel access
door (1). Plates shall be readable when door is open.
50. Install rivets (4). Rivet head shall be on the outside of unit.
51. Locate heater switch label (7) and match and drill holes in control panel (8).
52. Install heater switch label (7), toggle switch (5), and indicator light (6).
53. Referencing Figure 5-10, remove connector J6 from control box, then remove pins from J6-24, 26, and 25.
54. Install electrical leads, in accordance with wiring diagram. Secure leads with straps.
The coolant in the system shall contain the proper mixture of water and antifreeze to
prevent coolant from freezing or slushing. Failure could cause engine damage and/or
55. Add coolant to proper level in the winterization kit.
56. Connect the positive and negative battery cables.
57. Start and run engine until the radiator thermostat has opened.
58. Using a jumper wire start the heater coolant pump only by putting positive power to pin A6 on A2 of the control unit.
This will start the coolant pump only. Continue until pitch changes.
59. If necessary, top off coolant.
60. Disconnect positive lead from A6 on A2 of the control unit.
61. Double-check all hose connections for leaks.
62. With engine running, start heater. Check the heater code light, per the heater function codes plate for heater operation.
63. Turn off engine and allow heater to run until the coolant reaches temperature, at which time the heater will cycle to low
64. Switch heater off.
The water pump and combustion air blower will continue to run for several minutes.
65. Locate identification plate, next to existing plates on front housing. Drill holes and install four rivets contained