Hired-Hand Farm Hand Series: ST Temperature Controllers User Manual
Page 14
4801-5043 Rev 7/00
Farm Hand ST
13
Farm Hand 8-ST Example 3: Stage7 used as cooling with Mister ON and Stage 8 used as
heating (Refer to Graph 3).
A farm manager decides to set up a house using all eight stages of model 8-ST. The temperature
display was set for degrees Fahrenheit (
°
F) during installation using SWX1. The target
temperature is set for 68
°
F. The timer percentage on stage 1 is set to 50 using the procedure as in
the previous examples. Stages 1 through 7 are set for cooling with the following On Points: stage
1 = 70
°
F, stage 2 = 72
°
F, stage 3 = 74
°
F, stage 4 = 76
°
F, stage 5 = 78
°
F, stage 6 = 80
°
F, and
stage 7 to 82
°
F. The Mister is set to ON and the Mister run time is set to 40% (See Section 7.1
and 7.2). During installation stage 8 was set for heating using SWX3. Stage 8 On Point is set for
65
°
F. The Program Mode parameter “P5” is set for 66
°
C. The heating shuts off when the
temperature rises to 66
°
F.
Farm Hand ST-8 Example 4, Stages 7 and 8 Both Heating. Mister OFF. (Refer to Graph 4).
In this example stages 7 and 8 are both set for heat. (Refer to Section 3, Adjust Switches). The
target temperature is set for 72
°
F. Stage 1 timer percentage is set for 50% for ventilation. Stage
1 On Point is set for 74
°
F, Stage 2 On Point 76
°
F, Stage 3 On Point 78
°
F, Stage 4 On Point 80
°
F,
Stage 5 On Point 82
°
F, Stage 6 On Point 84
°
F, Stage 7 On Point is set for 69
°
F, and Stage 8 On
Point is set for 67
°
F. P5 is set for 70
°
F. The cooling stages operate as in the other examples.
Heating starts when the temperature drops to 69
°
F as Stage 7. If the temperature drops to 67
°
F,
then Stage 8 heating starts. Stage 8 turns off when the temperature rises back to stage 7 On Point
of 69
°
F. Stage 7 shuts off at the P5 Off Point of 70
°
F.
Farm Hand 8-ST
Degrees (Fahrenheit)
Stage 8
Stage 7
Stage 6
Stage 5
Stage 4
Stage 3
Stage 2
Stage 1
64 66 68 70 72 74 76 78 80 82
Stage 1 Timer % = 50%
Stage 7 Cooling
Stage 8 Heating
Target = 68 F
P5 = 66 F
*
*
* *
*
* *
*
Off Points
On Points
*
Stage 8
Stage 6
Stage 4
Stage 2
Stage 1
Stage 3
Stage 5
Stage 7
Farm Hand 8-ST
Degrees (Fahrenheit)
Stage 8
Stage 7
Stage 6
Stage 5
Stage 4
Stage 3
Stage 2
Stage 1
66 68 70 72 74 76 78 80 82 84 86
Stage 1 Timer % = 50%
Stages 1,2,3,4,5,6 Cooling
Stages 7,8 Heating
Target = 72
P5 = 70
*
*
* * * * * *
Off Points
On Points
*
Stage 8
Stage 7
Stage 6
Stage 5
Stage 4
Stage 3
Stage 2
Stage 1
Stage
On
Point
Off
Point
1
70
°
F
Target Temp.
2
72
°
F
On Point Stage 1
3
74
°
F
On Point Stage 2
4
76
°
F
On Point Stage 3
5
78
°
F
On Point Stage 4
6
80
°
F
On Point Stage 5
7
82
°
F
On Point Stage 6
8
65
°
F
P5 Shut Off
Stage
On
Point
Off
Point
1
74
°
F
Target Temp.
2
76
°
F
On Point Stage 1
3
78
°
F
On Point Stage 2
4
80
°
F
On Point Stage 3
5
82
°
F
On Point Stage 4
6
84
°
F
On Point Stage 5
7
69
°
F
P5 Shut Off
8
68
°
F
On Point Stage 7
GRAPH 3
Important: The Heating Off Point of
Stage 8 is automatically set the same
as the Heating On Point of Stage 7.
The Heating Off Point of Stage 7 is
parameter
P5.
GRAPH 4
Stage 7
Mister Run Time 40%