Installation Guide

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6i. Ensure that the reset interval and drain time knobs are in the "RESET" and "CLOSED" positions.
NOTE: The first time you program the Electronic Release Valve it will not begin to operate until after a time
delay equal to the setting of the reset interval knob you select. The Electronic Release Valve starts to keep
time when you set it. It is important that you set the timer at the hour you want it to operate. For example,
if you want the Electronic Release Valve to operate at 07:00AM, you must physically set it at 07:00AM.
Set your reset interval and drain time according to the tables in Figure 6, then replace the battery box
cover. A long reset interval will mean that the first flush diversion chamber empties less frequently,
leading to higher rainwater yield. A short reset interval will mean that the first flush diversion chamber
empties more frequently, resulting in a lower water yield.
Suggested Reset Setting
Pollution Level
1 day
Very high
2 days
Very high
3 days
High
4 days
Medium
5 days
Medium
1 week
Low
2 weeks
Very Low
4 weeks
Very Low
Recommended drain time setting
Approx. First Flush chamber size
5 minutes
20 litres
5.3 gallons
10
40
10
20
80
20
30
120
30
45
180
50
60
240
60
75
30
80
100
400
100
125
500
130
150
600
160
Figure 6
Electronic Release Valve Reset and Drain Time Settings
Figure 7
Delta Diversion Chamber Calculator
AUSTRALIA
Chamber Volume in Litres
Total Length in Millimetres
30
185
40
374
50
564
60
753
70
942
80
1132
100
1511
110
1700
120
1889
130
2079
140
2268
150
2458
180
3026
200
3405
USA
Chamber Volume in Gallons
Total Length in Inches
8
4
10
10
12
16
14
22
18
34
20
40
24
52
28
64
32
76
40
100
50
130
56
148
72
196
80
220