Hired-Hand Emergency Back-Up and Alarms: Secondary Sensing System Expansion - Manual (Page 8)

Manual No. 4801-3001 Rev 7-08 Secondary Sensing System Expansion 8 of 46
5.1.2 Target
The Target mode displays the target temperature used for Zone Alarm Limits and Back-Up Limits. The
Zone Alarm Limits and the Back-Up Limits are referenced to the target much like that of a stage on point
in a controller. Therefore, once initially set, the user will only adjust the target which will automatically
adjust the high and low limits appropriately. The Target temperature can be changed (0.5° increments)
using the Plus (+) or Minus (–) buttons. Example: If the Target Temperature is set to 80.0° F; The High
Zone Limit temperature is set to 92.0° F; The Back-Up High Limit temperature set to 90.0° F; When the
Target is dropped to 70.0° F, the High Zone Limits will change to 82.0° F and the Back-Up High Limit
temperature will change to 80.0° F.
5.1.3 High Limit
The High Alarm Temperature is the high temperature at which the controller will indicate an alarm
condition. The High Alarm Temperature is displayed and can be changed using Zone Input Switches
(Zones 1, 2, or 3) then using the Plus (+) or Minus (–) buttons.
The High Back-Up Limit is the high temperature at which Cool 1 of the Back-Up will turn ON.
See Section 9 (Back-Up Operating Conditions). The High Back-Up Temperature is displayed and can
be changed (1.0° increments) using the Select Button then using the Plus (+) or Minus (–) buttons.
NOTE: The High & Low Limits for the temperature sensors can be set individually or can be
programmed to be identical using program parameter P2 (See Section 6).
Target Temperature
High Back-Up Limit Temperature
High Alarm Limit Temperatures for Specific Zones Zone Input Switches
Select Switch