18
PC Program Instructions
6
Parameters
Figure 6-11
Outdoor Air Reset Curve
Figure 6-12
Parameter Set 4G
BMS Setpoint at min voltage (BMS setpt min V)
If parameter
4CB
is set to 2, the control must know what
minimum setpoint temperature to use. This can be changed by
accessing parameter
4GA
. The temperature range for this
parameter is 32°F (0°C) to 248°F (120°C). The default value is
70°F (21°C).
BMS Setpoint at max voltage (BMS setpt max V)
If parameter
4CB
is set to 2, the control must know what
maximum setpoint temperature to use. This can be changed by
accessing parameter
4GB.
The temperature range for this
parameter is 32°F (0°C) to 248°F (120°C). The default value is
180°F (82°C).
BMS Voltage at low setpoint (BMS V Min Setpt)
If parameter
4CB
is set to 2, the control must know what voltage
corresponds to the minimum setpoint. This can be adjusted by
accessing parameter
4GC.
The voltage range for this parameter
is 0Vdc to 4GD The default value is 2Vdc.
BMS Voltage at high setpoint (BMS V Max Setpt)
If parameter
4CB
is set to 2, the control must know what voltage
corresponds to the maximum setpoint. This can be adjusted by
accessing parameter
4GD.
The voltage range for this parameter
is 0Vdc to 4GC. The default value is 10Vdc.
Min BMS voltage to start demand (BMS V Heat)
If parameter
4GK
is set to 1, then the heat demand will be
generated by the voltage present on the 0-10Vdc input.
Parameter
4GE
determines the voltage at which the SMART
SYSTEM control initiates a heat demand. The range for this
parameter is 4GF to 10Vdc. The default value is Vdc.
Differential to stop BMS demand (Drop in BMS End)
If parameter
4GK
is set to 1, then the heat demand will be
generated by the voltage present on the 0-10Vdc input.
Parameter
4GF
determines how far below the starting voltage
(parameter
4GE
) the voltage must drop before the heat demand
ends. The range for this parameter is 0Vdc to 4GE. The default
value is 1Vdc.
BMS Power at min voltage (BMS mod @minV)
If parameter
4CB
is set to 0, the control must know what
minimum power level is to be used. This can be changed by
accessing parameter
4GG.
The range for this parameter is 20%
to 4GH. The default value is 20%.
BMS Power at max voltage (BMS mod @maxV)
If parameter
4CB
is set to 0, the control must know what
maximum power level is to be used. This can be changed by
accessing parameter
4GH.
The range for this parameter is 4GG
to 100%. The default value is 100%.
To adjust the BMS settings, click on the tab labeled
4G BMS
(see FIG. 6-12 below).