33
7
b.
IMPORTANT! - Heater relay connection: The return air heater ships from the factory
disabled. If a fogging system is installed, the ret urn air heater must be connected. The lead
will be labeled as “Install t o terminal 1 if fogging system is installed.”
i. The relay is located behind the rear panel of t he primary case (green arrow).
ii. Make the connection of the unconnected wire to terminal 1 o n the heater relay.
NOTE: The rocker switch for the fogger syst em is lighted. Press the lighted part of
the switch to turn the system on. If the light does not turn on when the switch
turned on, one or more of the conditions for fogging engagement is not met. The
following conditions will interrupt fogger operation:
o …the Grasslin T ime Clock (blue arrow above) is in off mode. The factory
default off-time is 10pm – 6am CST (overnight). This would be indicated by an open circle.
In figure 14, the program is engaged indicated by a closed circle.
o …t he Danf o ss controller is in defrost and the he a ter relay is
energized. An icicle with rain falling (below) will be indicated on the
Danfoss controller. The main display will show “- d -“.
When the circle is f i ll ed, as in figure
14, the timer is in the on mode and
the fogger power is not interrupted
by the time clock.
Figure 13: Green arrow is the Heater relay. Blue arrow is the Time
Clock. Re d arrow is the Danfoss controller.
Figure 12: Connect the unconnected lead (purple) to
terminal 1 on the heater relay.
Figure 14
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