MODERN BURNER UNIT (MBU)
UNIT MAINTENANCE PROCEDURES
To replace the Battery Pack batteries (1), remove the Battery Pack outer cover (2) by removing the 10
cover retaining screws (3) with a cross tipped screwdriver.
Remove the two nylon locking nuts and washers (4) on the hold-down bracket (5) of the battery being
Slide the hold-down bracket (5) off the threaded shafts (6) and remove.
Loosen and remove the battery terminal hex head bolts (7) that secure the power leads (8) to the battery
terminals of the battery being replaced.
Remove the defective battery and set aside. Take care in handling the batteries, as each weighs
approximately 35 pounds. Due to their weight, the batteries may stick to the neoprene cushion of the
Battery Pack base plate and make require a moderate amount of force to break the bond.
Install the new battery (1) onto the Battery Pack bottom plate (9).
Slide the hold-down bracket (5) onto the threaded shafts (6).
Reinstall the two nylon locking nuts (4) on the hold-down bracket (5) of the battery.
Batteries may explode if connected incorrectly. Red power lead MUST be connected to
positive (+) terminal of battery. Black power lead MUST be connected to negative (-) terminal
Reconnect each power lead (8) making sure to attach the RED lead to the positive (+) battery terminal
and the temperature sensor (10) under the BLACK negative lead of the negative (-) battery terminal.
Secure the power lead to the battery terminals with hex head bolts (7). Install the battery pack outer
cover with the 10 cover retaining screws (3) removed earlier. Be certain to dispose of the defective
battery in an environmentally approved manner.