71
Pre-Commissioning
Due to our policy of continuous product innovation, some specifications may change without notification.
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Prepare Operation Data
Always record the chiller operating condition; check it against the product specification and determine if it is functioning normally.
Analyze Water Quality
Analyze water quality during the test run, and save the data. Compare the water quality results after a certain period (a monthly check is
recommended) against the test run data to determine when to change the water.
Additional Functions - DIP Switch Settings
See below and the next two pages for DIP switch settings to the listed functions. Change the DIP switch settings on the control box PCB.
TEST RUN
Night Low Sound Function
Night low sound function determines the hottest time of the day
during cooling operation, and reduces the fan operation sound by
running it at a low RPM at night.
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• Request the function setting to the contractor after chiller installation.
• If the function is not used, turn the DIP switch OFF and reset the
power.
• If the chiller RPM is changed, the cooling capacity may be reduced.
Step
Maximum
Fan RPM
Standby Time
(Hour)
Function Operation
Time (Hour)
1
1
820
8
9
2
6.5
10.5
3
5
12
4
2
750
8
9
5
6.5
10.5
6
5
12
7
3
720
8
9
8
6.5
10.5
9
5
12
10
-
820
0
Continuous Operation
11
750
0
Continuous Operation
12
720
0
Continuous Operation
DIP-SW01
7-Segment
SW04C(X : cancel)
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SW01C(
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Figure 113: DIP Switch Locations (Appearances May Vary).
Turn No. 5 on the Main PCB DIP switch bank SW01 to ON.
Press the SW01D button until “Func” appears.
Press the SW01C button until the “Fn3” function is displayed.
Press the SW01D button once (1) to set the step.
When Fn3 is ON, press the SW10C or SW02C button until the
applicable step is displayed.
1.Step 1~3; Maximum RPM = 820
2. Step 4~6; Maximum RPM = 750
3. Step 7~8; Maximum RPM = 720
*Refer to the table at right for standby time / function operation time
by step.
The Night Low Sound function automatically cancels after nine (9)
hours of operation time.
Table 38: Setting the Time and Related Sound Level.
Figure 114: How to Set the Maximum RPM.
Figure 115: Starting the Night Low Sound Function (When Setting Step
1).
Figure 116: Stopping the Night Low Sound Function (When Setting Step
1).
After the maximum chiller temperature is
detected, it operates at 820 (Set) RPM after 8 hours (Standby time).