User guide

Publication 900-UM007D-EN-E - January 2011

4-12 Parameter Adjustments & Application Considerations

6. Select the decimal point position by pressing M.

Figure 4.24 — Press the U or D key to set the parameter to 1.

Figure 4.25

7. To return to the Operation function group press the key for at least

1 second.

Note: The newly configured value or parameter is loaded into controller

memory if you do NOT operate any key on the front panel for at least

2 seconds or by pressing the or

M key.

Executing the Heating and

Cooling Control Mode

Overview

Several forms/modes of heating, cooling, or heating and cooling control can

be used with Bulletin 900 controllers. The heating and cooling control mode

operates when

h-c: heating and cooling is selected in the Standard/Heating

and Cooling parameter (Initial Setting function group). To assign the function

of your outputs and alarms based on the control mode use the Control Output

X Assignment and Alarm Y Assignment parameters in the Advanced Settings

function group. Refer to the table below

The following functions are assigned to outputs in the initial status.

Decimal point

Table 4.B — Output and Alarm Assignments

Parameter Name Symbol Initial Status

Control Output 1 Assignment out1 Control output for heating

Control Output 2 Assignment (900-TC8 & 900-TC16 only) out2 Not assigned

Auxiliary Output 1 Assignment sub1 Alarm 1

Auxiliary Output 2 Assignment (900-TC8 & 900-TC16 only) sub2 Alarm 2

Auxiliary Output 3 Assignment (900-TC8 only) sub3 Alarm 3

Each output assignment is automatically initialized as shown below when the control module is changed.