RT-SVX34V-EN
37
Startup
Symbio Controls
The Symbio™ 700 supports a Service Test Mode that can
be used to energize the various components of the system,
either to support general system startup tasks or to support
troubleshooting. The user can initiate Service Test Mode
through the controller user interfaces, including the Symbio
Service and Installation mobile application.
The modes shown below can be initiated. Depending on
the equipment configuration, the controller will energize the
appropriate outputs. A user-selected timeout value will
determine how long the controller will remain in any given
state once initiated. For detailed information on how each
Service Test State is interpreted based on the equipment’s
configuration, see BAS-APG048*-EN, Symbio 700 for
Voyager 3 Packaged Rooftop Air-Conditioners Application
Guide.
Figure 32. Symbio 700 service test mode
Sequence of Operation
See Symbio™ 700 Controller with Voyager™ 3 Packaged
Rooftop Air-Conditioners Application Guide (BAS-
APG048*-EN).
Hot Gas Reheat
WARNING
Live Electrical Components!
Failure to follow all electrical safety precautions when
exposed to live electrical components could result in
death or serious injury.
When it is necessary to work with live electrical
components, have a qualified licensed electrician or
other individual who has been properly trained in
handling live electrical components perform these
tasks.
Set the unit to the Open Reheat Valve step within Service
Test. Once the unit is in the reheat test mode, verify that the
reheat valve opens to 85% position and cooling valve
closes to 15% position and that the supply temperature
rises 10ºF more than when in cooling mode stage 2.
The number of outdoor fan running depends on outdoor
ambient temperature while in hot gas reheat.
1. Clamp an amp meter around one of 1st stage heater
power wires at the heater contactor.
2. Using the Service Test Guide in , continue the
SERVICE TEST start-up procedure for each
compressor circuit.
Select the next desired Service Test Mode if continuing
from previous component start up or exit Service Test if
complete.
Final System Setup
After completing all of the pre-start and startup procedures
outlined in the previous sections (i.e., operating the unit in
each of its modes through all available stages of cooling
and heating), perform these final checks before leaving the
unit:
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