Johnson Controls GVC Series User Manual

Johnson Controls
5586996-JSG-A-0120 | Start-Up & Operation Guide
26
Output Signals Denitions
Furnx SGH Low Fire Test State The state output of the furnace x staged gas low re check
Furnx SGH High Fire Test State The state output of the furnace x staged gas high re check
GH Test State The state output of the modulating gas heating check
Furnx GH Low Fire Test State The state output of the furnace x low re check
Furnx GH High Fire Test State The state output of the furnace x high re check
Mod Gas Cmd The modulating heating output % command
Htg x Cmd Heating stage x command
Mod Comp Pct Cmd The modulating compressor output percent command
Clg 1 Cmd
The command for the rst compressor. If the rst compressor is modulating then the
modulation percentage should also be overridden by the override logic outside of this module
Clg 2 Cmd The command for the second compressor
Clg 3 Cmd The command for the third compressor
Clg 4 Cmd The command for the fourth compressor
Cooling State The current state of the start-up wizard cooling
Oil Check Presence
This signal is used to set the presence indication on the oil check point. The oil check
point should only be shown during an oil check
Charge Check Presence
This signal is used to set the presence indication on the charge check point. The charge
check point should only be shown during a charge check
Oil Countdown Timer
This timer is displayed on the unit controller in the start-up wizard section. It counts down
from 600 seconds to indicate the stabilize time
Condenser Fan Cmd
This is the condenser fan output for one condenser fan. It stays on as long as a
compressor is on
Condenser Fan Speed This is the condenser fan speed output that is 100% when a condenser fan is operating
LL Tempx Result This output is the liquid line temperature saved at the time of the circuit charge check
Suction Tempx Result This output is the suction line temperature saved at the time of the circuit charge check
LL Presx Result This output is the liquid line pressure saved at the time of the circuit charge check
Suc Presx Result This output is the suction line pressure saved at the time of the circuit charge check
Subcool x This output is the liquid line sub-cooling saved at the time of the circuit charge check
Superheat x This output is the suction superheat saved at the time of the circuit charge check
SF Lx Amps Result
These three outputs are the saved results for the amperage on each leg of the supply fan
power
Start-Up Wizard Sequence
The start-up wizard is only run when user selection en-
ables it. The enable input on this wizard allows for this,
which ensures multiple safety operations to remain ac-
tive.
The start-up wizard provides the following start-up tests:
• Dampers
• Energy recovery wheel (ERW)
• Supply fan (automatically runs if heating or cool-
ing is enabled)
• Cooling
• Heating
Table 14: Start-Up Wizard Signals (Continued)
To start the start-up wizard, set the enable/disable op-
tion to enable. Enter the supply line voltage:
• Phase A: Input V
• Phase B: Input V
• Phase C: Input V
Select yes to continue.
Calculate imbalance by finding the difference between
the highest and lowest voltage and dividing it by 460.
Any imbalance of more than 2% is considered a fail-
ure. Voltages, voltage imbalance, and test status are
recorded.

Johnson Controls GVC Series Specifications

General

Brand	Johnson Controls
Model	GVC Series
Category	Air Conditioner
Language	English