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SETTING
HUM OUTPUT—Select which output relay to use for the humidifier. The choices only include outputs that are not
already assigned to another function.
The output that is selected (Y3, O/B or W2) is used to control the humidifier equipment.
NOTE: HUM OUTPUT is only available if the HUMIDIFIER setting is YES.
The HUM OUTPUT option is not available if the Y3, O/B and W2 relays are already being used for other functions.
•
The Y3 output is used for 3 stages of cooling, the humidifier, and the dehumidifier setting of Humidi-MiZer™/
Perfect Humidity™/Hot Gas Reheat.
•
The O/B output is used for heat pump equipment, the humidifier, and the dehumidifier setting of the Humidi-
MiZer™/Perfect Humidity™/Hot Gas Reheat.
•
The W2 output is used for 2 stages of heating, the humidifier, and the dehumidifier setting of Humidi-MiZer™/
Perfect Humidity™/Hot Gas Reheat dehumidification.
DEHUMIDIFIER—Enable the dehumidification functionality.
Range:
•
NO – Dehumidification is disabled
•
YES – When the humidity is above the dehumidify target, the cooling setpoint is adjusted downward, increasing
the cooling demand according to the following equations. The system uses the first stage of cooling to satisfy
the dehumidify demand.
Cooling setpoint
<= 70°F
70.1°F – 74.9°F
if >6%)
>= 75°F
•
OVCL - Commands the system to operate the compressor, within limits, when there is a dehumidification
demand, even if there is no cooling demand. The system uses first stage of cooling to overcool up to 2°F and no
more, when satisfying a dehumidification demand.
•
HMZR - When configured as a Humidi-MiZer™/Perfect Humidity™/Hot Gas Reheat output, and the humidity
level is above the dehumidify target, 24V is output at the selected terminal. When the humidity level is below the
dehumidify target, 0 Vac is output on the selected terminal. There is a +1/-4% hysteresis around the dehumidify
target to prevent rapid on/off cycling of the selected output.
This output may be connected to compressor outputs on commercial equipment. If the selected output is energized
without any compressors being energized, the 5-minute time guard must be enforced.
NOTE: If the COMPRESSOR TYPE is set to NONE, dehumidification is not available.
DEHUM OUTPUT— Select which output relay to use for the Humidi-MiZer™/Perfect Humidity™/Hot Gas Reheat
function of the dehumidifier. The choices only include outputs that aren't already assigned to another function and
is only available if the dehumidifier selection is set to Humidi-MiZer™/Perfect Humidity™/Hot Gas Reheat.
When dehumidifier setting is Humidi-MiZer™/Perfect Humidity™/Hot Gas Reheat, the selected relay controls the
Humidi-MiZer™/Perfect Humidity™/Hot Gas Reheat equipment.
This setting is not available if the configurable outputs (Y3, O/B, and W2) are already assigned to other functions.
Any configurable output that is already assigned to another function is not shown in the DEHUM OUTPUT
selections.
CO2 FAULT THRESHOLD - Allows the installer to specify the threshold for the High CO
INPUT parameters must be set to CO
CO2 CALIBRATION - The CO
components in the analog input circuitry. If the CO
voltage out of the sensor (PPM=200 x VDC), the calibration screen can be used to increase or decrease the value
until it matches the reference. The ANALOG INPUT parameter must be set to CO
To Set Up BACnet
See Table 8 for a list of BACnet Settings and specifications.
SETTING
BACNET ENABLE—Enable or disable the BACnet communications. After restoring factory defaults, the user is
prompted to decide whether or not to enable BACnet. Until this choice is made, the installer menu loads after every
restart and the installer menu goes directly to the BACNET ENABLE setting where ? is displayed.
NOTE: Changing the BACNET ENABLE requires the thermostat to be restarted. When the installer exits the
configuration settings after making changes to the BACnet settings, there is a prompt to either cancel those
settings or save the new settings which force a thermostat reset.
MSTP MAX MASTER—Set the maximum MAC address for BACnet MS/TP master devices. BACnet MS/TP MAC
addresses for master devices exist in the range from 0 to 127. Each BACnet MS/TP device periodically looks for
other devices (sends Poll for Master message) with addresses from its own address, plus one, to the next known
address (wrapping to 0 after 127).
Performance gains can be made on a BACnet MS/TP network by not leaving any gaps in MAC address and setting
the MS/TP Max Master parameter of the device with the highest MAC address to a value equal to its MAC address.
The downside to setting the MS/TP Max Master to a value less than 127 is, if new devices are added to the network
with addresses above the Max Master value, they won't be discovered or added to the network.
NOTES:
•
Changing the MS/TP Max Master requires restarting the thermostat. When the installer exits the configuration
settings after making changes to the BACnet settings, there is a prompt to either cancel those settings or save
the new settings, which forces a thermostat reset
•
The Max Master parameter should be set to a value equal to or greater than the MS/TP MAC Address.
This setting is not displayed if BACnet is disabled
Table 7 — Installer Setting Screen Options (cont)
Algorithm
Use the cooling setpoint only
Cooling setpoint = Cooling Setpoint – (Cooling Setpoint - 70°F) x
(Dehumidify Error / 10) with maximum dehumidify Error of 6% (i.e. use 6%
Cooling setpoint = Cooling Setpoint – (Dehumidify Error / 2
with maximum dehumidify Error of 6%
for this setting to be available
2
CALIBRATION screen can be used to compensate for the variability of the
2
level is known from a reference, or by measuring the DC
2
Table 8 — BACnet Settings
fault. The ANALOG
2
for this setting to be available.
2
18
DEFAULT/RANGE
D:
Off
R:
Off
Y3
O/B
W2
D:
No
R:
No
Yes
OVCL
HMZR
D:
Off
R:
Off
Y3
O/B
W2
D:
1100 PPM
R:
900 to 1600 PPM
D:
RAW, uncalibrated value
R:
±30% of RAW value
DEFAULT/RANGE
D:
No (disabled)
R:
Yes (enabled)
No (disabled)
D:
127
R:
1 to 127
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