User Guide

EVERGREEN

VS USER INTERFACE (UI) OVERVIEW

The user interface is pre-programmed with the following default airﬂow and delays for each mode of operation:

Airﬂow can easily be adjusted if needed to match the measured

temperature rise or CFM values to each HVAC system’s capacity

requirements. Airﬂow is increased or decreased while the system

is operating in any demand (heat, cool, fan) by pressing the (+)

or (-) button. One button press will change the airﬂow by 5%.

When the measured airﬂow is achieved in a given demand, the

UI will store the last adjusted value for that demand. Change the

thermostat demand to adjust the airﬂow in a new demand. When

all demand airﬂow adjustments are complete, the UI will operate

at all of the stored values.

If there is a need to reset the airﬂow and delay values to the

factory default settings, press and hold both airﬂow buttons for

5 seconds. Both LED indicators will ﬂash three times when the

reset is complete.

The “UI Input Indicator” LED provides the following information:

– Solid ON = The UI is receiving 24 VAC between the RED (R) and the BLUE (common) thermostat wire

– Continuous Blinking = The UI is receiving a thermostat demand (24 VAC on one of these inputs W1, W2, Y1, Y2 or G)

The “Motor Indicator” LED provides the following information:

– Solid ON = The motor should be operating

– Blinking = Represents a push of an airﬂow adjustment button

– 3 Fast Blinks = The minimum or maximum airﬂow adjustment limit

COMMISSIONING

The default airﬂow values stored in the Evergreen VS user interface may not exactly match the airﬂow requirements of each system

it is installed into. It is highly recommended to operate the HVAC system in all modes of operation, measure airﬂow and adjust the

airﬂow on the UI, if needed, to match the system performance guidelines in the HVAC system’s manual or unit rating plate.

Airﬂow can be adjusted on two stage systems with a 1st or 2nd stage thermostat demand. There is a ﬁxed delta between W1-W2

and Y1-Y2, which means if you adjust one value up or down the other value moves up or down with it at ﬁxed rate. Most HVAC

manufacturers recommend measuring and adjusting airﬂow in 2nd stage on two stage systems. The ﬁxed delta between these

demands can be removed, if needed, using the Evergreen VS Optimizer™ tool (see page 9).

The default ON/OFF and second stage delays were selected to provide safe operation for the majority of installed applications.

However, these delays can be adjusted if needed to add comfort and/or more precisely match the operation of each unique system

using the Evergreen VS Optimizer tool (see page 9).

Defaults

W1 - %A/F = 60 - On Delay = 0 seconds - Off Delay = 90 seconds

W2 - %A/F = 85 - On Delay = 0 seconds - Off Delay = 90 seconds

Y1 - %A/F = 60 - On Delay = 0 seconds - Off Delay = 0 seconds

Y2 - %A/F = 85 - On Delay = 0 seconds - Off Delay = 0 seconds

G - %A/F = 40 - On Delay = 0 seconds - Off Delay = 0 seconds

W1-W2 Time Delay 10 minutes

Y1-Y2 Time Delay 10 minutes