Aprilaire 8800 - Page 39

SH++, SH--
Increment or decrement the controlling thermostat heat setpoint COS: N/A
Permissions: Write only
Assignment
Command
Syntax: SN[#] SH++=[value]<CR>
Syntax: SN[#] SH--=[value]<CR>
Description: Increments or decrements the controlling thermostat heat setpoint to [value] based on the ++/--.
Examples: SN1 SH++=1<CR>
SN1 SH--=5<CR>
Response Syntax: SN[#] SH++=[value][scale]<CR>
Syntax: SN[#] SH--=[value][scale]<CR>
Example: SN1 SH++=1F<CR>
Node address 1 responds with incrementing the heat setpoint by 1°F.
Parameters Range
value: controlling heat setpoint change value
scale: temperature scale [F, C]
F: Fahrenheit
C: Celsius
The thermostat controlling heat setpoint corresponds to the active heat setpoint to which the thermostat is controlling the heating equipment.
This command is ignored if the controller type is set to humidistat.
When the thermostat system mode is set to AUTO, the heat and cool setpoints are interdependent and must abide by the deadband. If an
assignment command is received with a heat setpoint increment value that causes a deadband violation, the cool setpoint is automatically
increased to fulfill the deadband requirement. If the deadband requirement cannot be fulfilled by increasing the cool setpoint, the command is
ignored and no response sent.
If an assignment command is received while the thermostat is running the program schedule, the thermostat automatically initiates a
temporary hold with an end time of the start time of the next scheduled event. If a hold is active at the time of the assignment command,
the hold setpoint is modified. In addition, if a hold is initiated as a result of the receipt of this command, a C17 COS unsolicited message is
issued (if C17 is ON).
If an assignment command is received and the thermostat program format is programmable (i.e. not non-programmable), and the system
mode is set to Cool or OFF, this command is ignored.
If the resultant setpoint is outside the allowable range for the setpoint temperature, the command is ignored.
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