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506471-01Page 32 of 41 Issue 1034
Figure 35
Call for Fan
G
g
50%
CALL OFF
G - Fan Switch ON
- Fan Switch OFF
g
Figure 36
Single Stage Cooling
7.5 minutes
Y
y
82%
100%
82%
1
min
CALL OFF
Y - Cool Demand Present
- Cool Demand Satisfied
y
Figure 37
Two Stage Cooling
Y1
y1
57%
100%
CALL OFF
7.5
minutes
70%
Y1 - 1 Stage Cool Demand Present
st
- Demand Satisfied1 Stage Cool
st
y1
Y2 - 2 Stage Cool Demand Present
nd
- 2 Demand Satisfied
nd
Stage Cool
y2
1
min
70%
Y1
y2
/
Y1
/
Y2
y1
57%
1
min
57%
Figure 33
1st Stage - 2nd Stage (W1/W2) Heat Call
W1
100%*
CALL
W2 - High Heat Demand Present
- High Heat Demand Satisfied
w2
50%*
75%*
** Percentage of High Fire CFM
1
min
W1 - Heat Demand Present
- Heat Demand Satisfied
w1
* Percentage of Low Fire CFM
100%**
82%**
2 min
OFF
W1/W2
w1
w2
82%*
2 min
w1
1
min
Figure 34
High Heat (W2) Call
W2
100*
82%*
2 min
CALL
OFF
W2 - High Heat Demand Present
- High Heat Demand Satisfied
w2
* Percentage of High Fire CFM
w2