Bryant 580J*04--12 Manual de instalación Pagina 15

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15
START--UP
IMPORTANT: Follow the base unit’s start-up sequence
documented in its specific instructions. Use the base unit’s
start-up check list when performing the start-up. At the
end of this manual there is an additional RTU Open
Start-up Sheet to be completed and included with the base
unit check list.
Besides the base unit start-up, there are a few steps to take to
properly start-up the controls. RTU Open’s Service Test
function should be used to assist in the base unit start-up and
also allows verification of output operation. Controller
configuration is also part of start-up. This is especially
important when field accessories have been added to the
unit. The factory pre-configures options installed at the
factory. There may also be additional installation steps or
inspection required during the start-up process.
Additional Installation/Inspection
Inspect the field installed accessories for proper
installation, making note of which ones do or do not
require configuration changes. Inspect the RTU Open’s
Alarms for initial insight to any potential issues. See
troubleshooting section for alarms. Inspect the SAT sensor
for relocation as intended during installation. Inspect
special wiring as directed below.
Power Exhaust Relay Power
The relay used by the RTU Open board to control power
exhaust is a dry contact which means it does not have
24vac. This 24vac must be connected to the relay to allow
it operate the power exhaust relay in the PE accessory. A
24vac source should be provided to the J11-2 pin on the
RTU Open. This can be provided by the unit’s transformer
from various sources. The “R” terminal on the Central
Terminal Board (CTB) is a logical source.
NOTE: Factory installed power exhaust comes
pre--configured and does not require routing 24vac as
described above. This factory installed option is only
available on the following vertical air flow units:
580J/558J/548J 17--30 and 581J/551J 16--30.
Service Test
The Service Test function can be used to verify proper
operation of compressors, heating stages, indoor fan,
power exhaust fans, economizer, and dehumidification.
Use of Service Test is recommended at initial system start
up and during troubleshooting. See Appendix A for
Service Test Mode table.
Service Test mode has the following changes from normal
operation:
S Outdoor air temperature limits for cooling circuits,
economizer, and heating are ignored.
S Normal compressor time guards and other staging
delays are ignored.
S The status of Alarms (except Fire and Safety chain) is
ignored, but all alerts and alarms are still broadcasted
on the network.
Service Test can be turned ON/OFF from Field Assistant
or from the network. Once turned ON, other entries may
be made through the network. To turn Service Test on,
change the value of Test Mode to ON, to turn Service Test
off, change the value of Test Mode to OFF.
Service Test allows testing of each controller output.
Binary Service Test functions are on when the Default
Value is set to Enable and off when set to Disable.
The output of the Analog Service Test is controlled by
percentage (0--100%) entered into the Default Value.
It is recommended to return every Service Test variable to
Disable or 0.00 after testing each function (unless that test
variable must be active to test a subsequent function. As
in Compressor 2 Test).
All outputs return to normal when Service Test is set to
Disable. In addition, Service Test also returns to Disable
after 1 hour.
Fan Test
This point allows the board’s fan output to be manually
turned On (Enable) and Off (Disable). Other test points
that require the fan for operation will automatically turn
the fan on and this point will still show “Disable.” Fan test
can operate simultaneously with other Service Test Points.
For units equipped with variable speed fans, the fan test
will operate the unit’s fan at minimum VFD speed.
High Speed Fan Test
Use the High Speed Fan Test to activate and deactivate
the Supply Fan (BO--1) output. Note that this output is
only applicable if Fan Control is set to Two Speed and
Unit Type is NOT equal to HP O/B Ctrl.
Compressor 1 and Compressor 2 Test
The compressor test points are used to change output
status for the individual compressors. Compressor starts
are not staggered. The fan and heating service test outputs
are reset to “Disable” for the compressor service tests.
The Indoor fan and outdoor fans are controlled normally
to maintain proper unit operation. All normal cooling
alarms and alerts are functional.
Heat 1 and Heat 2 Test
The heat test points are used to change output status for
the individual heat stages, gas or electric. The fans and
cooling service test outputs are reset to “Disable” for the
heat service tests. Indoor and outdoor fans are controlled
normally to maintain proper unit operation. All normal
heating alarms and alerts are functional.
Dehumidification Test
For units with the factory Reheat option, the dehumidifica-
tion relay is used to change the output status to operate the
circuits in different Reheat modes. Dehumidification relay
on by itself puts all circuits running in Hot Gas Reheat dehu-
midification mode; dehumidification relay on and the cool-
ing test (compressor test relays) on puts unit and or individu-
al circuits in subcooling dehumidification mode. The fans
and heating service test outputs are reset to Disable” for the
dehumidification service test. Indoor and outdoor fans are
controlled normally to maintain proper unit operation. All
normal cooling/dehum alarms and alerts are functional.
TS---5580J---02
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