38
WSHP-SVX014F-EN
Figure 30.
UC400 controls with DIP switch settings
Table 29.
Profiles for altitude range
Profile
Altitude (Feet)
A
0–2000
B
2000–4000
C
4000–6000
D
Above 6000
Vertical - Units with Deluxe 24V or
Tracer
®
®
ZN524 controls
For vertical sizes EXVG 009-070 and DXVG 024-070, the
ECM is programmed for constant torque and delivers
airflow similar to a PSC motor while operating at a
higher efficiency.
Figure 31.
ECM control box
Figure 32.
ECM control board
1. Potentiometer will be used to adjust the PWM
output
2. Seven segment display
Using a screwdriver, the potentiometer will be used to
adjust the PWM output from 20% to 100% PWM.
Increasing the PWM will increase the motor speed.
When setting the airflow for air balancing, the high-
speed terminal (GH) must have 24 Vac signal. This will
ensure that the PWM output will be adjusted for the full
load airflow.
The display will show the commanded motor speed
percentage. If running on low speed (GL), the low-
speed value will be displayed. If running in GH the
high-speed value will be displayed. If both GH and GL
input signals are present, the PWM output value will be
the GH value.
Waterside Economizer
Installation
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