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Service Test can be turned ON/OFF from Field Assistant, from the
network, or from the Equipment or System Touch. Once turned
ON, other entries may be made with the display or 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 oth-
er Service Test Points. The fan test will operate the unit's fan at
minimum VFD output speed.
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. Compressor Tests can be enabled sepa-
rately for Stage 1 or 2 or enabled in combination for Stage 3. 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 indi-
vidual 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 oper-
ation. All normal heating alarms and alerts are functional.
POWER EXHAUST TEST
This point allows the board's power exhaust (PE) output to be
manually turned On (Enable) and Off (Disable). Power Exhaust
test can operate simultaneously with other Service Test Points.
ECONOMIZER TEST
This point allows the board's economizer output to be manually
controlled from 0 to 100 % Open. Economizer test can operate si-
multaneously with other Service Test Points.
VFD SPEED TEST
This point activates the board's 0-10vdc analog output that con-
trols the unit's supply fan VFD speed.
NOTE: Service Test Mode does not timeout. Be sure to turn off
test mode or cycle power to the RTU to return to normal operation.
Configuration
The VAV-RTU Open controller's configuration points effect the
unit's inputs and operation. Review and understand the meaning
and purpose of each configuration point before changing it from
the factory default value. Use the VAV-RTU Open Start-up Sheet
during configuration; fill in changed values if changed from facto-
ry default. There are three main configurations menus: SET-
POINT, UNIT CONFIGURATION, SERVICE and LINKAGE.
Each configuration point is described below under its according
menu. See Appendix A for menu structure.
SETPOINT
Supply Air Setpoint
The user-defined base setpoint for Supply Air while in the Cooling
mode.
Range = 45 to 75°F
Default = 53°F
Static Pressure Setpoint
The base setpoint for supply duct static pressure to be maintained
at the static pressure sensor, which is located approximately 2/3 of
the way down the supply duct.
Range = 0.25 to 2.25 in. wg
Default = 0.5 in. wg
Supply Air Tempering Setpoint
The temperature defined to control supply air when Outside Air
Temp is below Supply Air Temp Low limit and unit is operating in
Fan Only or IAQ Override mode.
Range = 40 to 75°F
Default = 48°F
Occ Relative Humidity Setpoint
The setpoint used to determine when any supply air reset, if previ-
ously calculated, should not be used. This will cause the supply air
to be controlled at a temperature closer to the configured SAT set-
point when a high humidity condition exists.
Range = 0 to the Unocc RH control setpoint
Default = 60% RH
DCV Max Ctrl Setpoint
The difference between indoor and outdoor CO
sults in maximum ventilation damper position. This value is trans-
mitted through linkage from the VAV zones.
Range = 0 to 9999ppm
Default = 110ppm
Power Exhaust Setpoint
The outside air damper position at which the controller energizes
the Power Exhaust relay.
Range = Open
Default = Open
NOTE: This setpoint is automatically adjusted in order to main-
tain proper building pressure. The actual calculated value, Calcu-
lated PE Setpoint, is shown in MAINTENANCE→USER.
NOTE: This point is only used when Continuous
Occupied Exhaust = NO
UNIT CONFIGURATION
Fan Mode
Sets the operation of the indoor fan when not in cooling or heating
mode. Refer to fan operation for details on each operation.
Range = Auto, Continuous, or Always On
Default = Continuous
Power Fail Restart Delay
Sets how long the controller delays normal operation after the
power is restored. Typically used to prevent excessive demand
when recovering from a power failure
Range = 0 to 30 sec
Default = 5 sec
Fan Off Delay
The number of seconds that the fan continues to run after heating
or cooling has ended.
Range = 5 to 120 sec
Default = 90 sec
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