UV-SVP01A-EN 59
Replacing Circuit Boards
Tracer ZN.520 Unit Controller Replacement
1. Disconnect power or disable
the circuit breaker to unit.
2. Remove bad or questionable
Tracer ZN.520 controller cir-
cuit board.
3. Install controller in the unit
with the heat-sink placement
at the top of the control box.
(See page 32).
4. Connect the power to the cir-
cuit board ONLY.
5. Connect Rover and properly
configure the controller,
unless a previously config-
ured board is purchased.
6. Power down.
7. Connect the remaining input
and output wiring to the con-
troller.
8. Reapply power.
9. Complete sequence 7 and 8
above in the installation sec-
tion of this manual.
10. Refer to BAS manual for
instructions on how to install
the new ZN.520 into BAS sys-
tem.
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