4-15 AIR DUCT HOSES AND ADAPTER (CONT)
Shock or injury may result from working on electrical components.
Take care to ground parts and not make personal contact.
Adjust handle (1) to full open position. Allow
engine to run for at least two minutes after
stopping combustor or until temperature gauge
needle returns to green area. Press and hold
red shutdown button (2) until engine stops.
Heat exchanger casing may become dangerously hot.
Do not touch casing during or immediately after operation.
Perform maintenance only after heater has cooled.
Air duct hoses and
Remove as follows:
a. Disconnect 12inch diameter air duct hose (1)
from duct adapter (2), adapter (3), or other
12inch diameter air duct hose.