Removing The Heater Assembly From A Spa System - Balboa ML550 Manual

Removing the Heater Assembly from a Spa System

Note: Be careful when removing a heater assembly
from a spa plumbing system. Water may splash out
under pressure.
Water under pressure in the plumbing may splash out,
and onto the system's electronic board. Do not remove the
system door until the water has been drained from the heater
assembly tube.
1. Turn off the main power.
2. Close off the slice valves (or, ball valves) adjacent to the
heater assembly.
3. Once the valves are closed, slowly crack the heater
assembly end tubes until water flows out. If the
connectors are on too tight, it may be necessary to
loosen the Phillips screws that hold the connectors
together. Once the water has been drained, continue.
Keep the lower nut from turning by
supporting it with another end-wrench
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Remove both nuts that secure
the element in place.
4. Remove the system door cover.
5. Remove the nuts securing the copper straps to the
heater assembly's terminal connectors. Be sure to
use a supporting end wrench on the lower nut.
Otherwise, excessive torque may be occur on the straps
and put undue stress on the PCB.
6. Remove the heating assembly sensor wires and replace
if necessary.
7. Remove both nuts that secure the element in place.
8. Remove the heater assembly.