Programming instructions

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 Select Ventilation adds 5° to the outdoor temperature to create the biased high alarm, up to a
maximum of 85 °F.
 At approximately 6 AM, biasing starts. At approximately 1:30 PM, there is an alarm condition as
the ambient temperature exceeds the biased high alarm.
Alarm biasing for PB-1 to PB-6 Power Blocks
For PB-1 to PB-6 Power Blocks, you set the bias offset.
When the outdoor temperature is higher than the high alarm temperature, Select Ventilation adds the
bias offset to the high alarm temperature to create a new setting called the biased high alarm. The
biased high alarm becomes the new temperature limit. When the ambient temperature is higher than
the biased high alarm, there is an alarm condition.
In the following example, the high alarm temperature is 80 °F, and the bias offset is 5°F.
 When the outdoor temperature is higher than the high alarm temperature (80°F), Select
Ventilation adds 5° to the high alarm temperature to create the biased high alarm of 85 °F.
 When the ambient temperature is higher than the biased high alarm setting, there is an alarm
condition.
Use the Master settings worksheet on page 82 when programming Power Block
settings.
70
75
80
85
90
95
Temperature (ºF)
Time
Outdoor High alarm Biased high alarm Ambient
Alarm condition
Biasing starts Biasing ends