IOM 1206-13 • TRAILBLAZER
®
MODEL AGZ CHILLERS
106 www.DaikinApplied.com
Startup and Shutdown Procedures
Table 87: Flow Volume Calculation
Step 3:
After the ‘Teach’ function is completed and the outer
LEDs flashed, the flow switch will indicate a new set point
based upon the current flow which should still be at the steady
state minimum desired operating flow.
typical display for this condition. All LEDs to the left of the
SP LED are lit green. The SP LED is lit RED (or may toggle
amber) which indicates that the flow switch is OPEN. Typically,
an increase in fluid flow is between 15% to 30% above the
‘Teach’ function flow is required for the SP LED to turn AMBER
and the flow switch to CLOSE indicating acceptable flow.
Figure 82: Teach Adjustment Complete
In Step 3, the ‘Teach’ function re-adjusted the flow switch set
point (SP) while flow was at the minimum desired operating
flow. The chiller will not operate at this flow because the
flow switch is OPEN after performing the ‘Teach’ function.
The benefit of the ‘Teach’ function is to quickly set the set
point within the desired operating range. Additional ‘manual’
adjustment of set point is required in order to allow for chiller
operation at this minimum flow. The ‘+’ and ‘-’ buttons on the
face of the flow switch allow for the manual adjustment of the
SP. Pressing the ‘+’ button reduces the flow set point while
pressing the ‘-’ button increases the flow set point. Each button
press, ‘+’ or ‘-‘, changes the flow set point by 2.5 cm/s.
Step 4:
Press the ‘+’ button until LED ‘9’ begins to flash, as
shown in
. Opening of flow switch should now occur
at approximately 80% to 90% of minimum flow.
Figure 83: Upper Range of Minimum Flow
Step 5:
Once the SP is set, it is recommended that the
sensor be locked to avoid inadvertent readjustment. This
can be performed by pressing both the ‘+’ and ‘-’ buttons
simultaneously for 10 seconds. The indication goes out
momentarily indicating the unit is locked. To unlock, the same
procedure is performed to toggle to unlocked.
NOTE:
1. The LED window display on flow switch represents
a velocity range of 50 cm/s. The window centers on
the set point (SP). For example, if the SP was set to
200 cm/s, then the LED labeled ‘0’ would represent
a velocity of 180 cm/s when lit and the LED labeled 9
would represent a velocity of 230 cm/s when lit.
2. Each LED represents 5 cm/s, or two presses of the
‘+’ or ‘-’ buttons.
Pipe
Size
(inch)
Inside
Pipe
Diameter
(inch)
US GPM at the velocities indicated below
GPM
adjustment
per '+' or '-'
key input
Default
20 cm/sec 30 cm/sec 50 cm/sec 75 cm/sec 100 cm/sec 150 cm/sec 200 cm/sec 250 cm/sec 300cm/sec
2
2.06
6.86
10.3
17.2
25.7
34.3
51.5
68.6
85.8
102.9
1.72
2.5
2.46
9.79
14.7
24.5
36.7
49.0
73.4
97.9
122.4
146.9
2.42
3
3.07
15.1
22.7
37.8
56.7
75.6
113.4
151.2
189.0
226.8
3.78
3.5
3.55
20.2
30.3
50.6
75.8
101.1
151.7
202.2
252.8
303.3
5.06
4
4.03
26.0
39.1
65.1
97.7
130.2
195.3
260.4
325.5
390.5
6.51
5
5.05
40.9
61.4
102.3
153.5
204.6
306.9
409.2
511.5
613.7
10.2
6
6.07
59.1
88.6
147.7
221.6
295.5
443.2
590.9
738.7
886.3
14.8
8
7.98
102.3
153.5
255.8
383.7
511.6
767.5
1023.3
1279.1
1534.7
25.6
10
10.02
161.3
241.9
403.2
604.8
806.5
1209.7
1612.9
2016.2
2419.1
39.0
12
11.94
229.0
343.4
572.4
858.6
1144.7
1717.1
2289.5
2861.9
3433.8
57.2
14
13.13
276.8
415.2
692.0
1037.9
1383.9
2075.9
2767.8
3459.8
4151.3
69.2
16
15.00
361.5
542.2
903.6
1355.5
1807.3
2710.9
3614.6
4518.2
5421.2
90.4
18
16.88
457.5
686.3
1143.8
1715.7
2287.6
3431.4
4575.2
5719.0
6862.1
114.4
20
18.81
572.4
853.0
1421.6
2132.4
2843.2
4264.8
5686.4
7108.0
8528.6
142.2
