Phason Three Ventilation Stage Control, User Manual

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TVS user manual Phason
If the power factor is not known the correction number may be measured. Follow the steps below.
1)
Set the Minimum Ventilation parameters (# 2 and 3) to the desired value.
2)
Set the P-Band(s) to 10
o
F (parameters # 5 and 8).
3)
Observe the ROOM TEMPERATURE.
4)
Adjust the TEMP SET (parameter # 1) to equal the ROOM TEMPERATURE and Stage 2 Start P-
Band2 (parameter # 7) to 0. The Stage 1 and Stage 2 fans will now be running just above minimum
ventilation.
5)
Slowly decrease the TEMP SET (parameter # 1) and listen to the fans increase in speed.
6)
Observe the TEMP SET ( FULL SPEED TEMP SET ) at which the motors reach full speed.
7)
Use CALC 2 to calculate the Correction number for the motors as follows:
CALC 2:
10
o
F = Correction number
FULL SPEED TEMP SET - ROOM TEMPERATURE
Example 2:
ROOM TEMP = 75
o
F and FULL SPEED TEMP SET = 82
o
F
Correction Number = 10
o
F = 1.43
82
o
F - 75
o
F
Now use CALC 1 to find the P-Band setting.
26 2009-09-15