INITIAL FUNCTION TESTS
DMC-100 / EXU-100
Testing the System Controller
"Off".
that the operation time is counting down.
system will shut off (unless the snow
6. Press the STOP button.
3. Press the STOP button.
1. Add time to the timer by pressing the
parts at line voltages, and therefore must
7. Testing is complete. Install the DMC-100
accordance with OSHA safety laws and
Test the system by carefully following the
potentially
1. Press the INCREASE button to add time to
The digital display panel should indi
2. Press the START button (Figure 22). The
Testing the Power Currents
© 2008
are
qualified
NOTE: Time is adjusted in 30-minute
the housing.)
function tests, refer to Tables I and II in the
the supplied 8/32-inch screws. Repeat until
L2 and load T1 and T2 of each contactor.
housing cover on the unit and fasten it with
procedures outlined in this section.
professionals should be performing this
breaker and power up the control circuit only.
sensor switch is sending the control box a
WARMZONE
WARNING:
procedure. Use extreme caution, as line
appendix of this manual for troubleshooting.
Installation and Operation Manual
qualified service personnel. Electricians
Function Tests.
9
and check that the zone currents are within
circuits going to the contactors at this
The timer will stop the countdown and the
regulations.
the name tag ratings.
tabs that insert into corresponding notches in
service
involves exposure to un-insulated electrical
2. Press the START button.
Only
Ensure
3. Locate an appropriate point in the system
no
STEP 1: Turn on the 120 volt control circuit
INCREASE button (Figure 18).
voltages
the timer.
Orig. 4-08
ratings of the heating cables.
cate "Off"
(Do not turn on the power for the branch
Figure 17: Attaching cover panel to the housing.
Warmzone logo will illuminate and the
procedure
Observe the digital timer display to confirm
increments up to a maximum of 4 hours.
time).
persons or objects come in contact with
www.warmzone.com
as shown in Figure 24.
signal to remain on). The digital time
present.
This
WARNING:
"Off".
Installation is now complete. Proceed to Initial
4. Turn on the GFEP branch circuit breakers
be performed with extreme caution by
performing this procedure must do so in
for each contactor one at a time.
all covers are installed.
contactors will energize.
illuminated and the timer display indicates
Confirm that they are within name tag
window will continue to display the time for
30 seconds, after which, it will display
that
NOTE: If the control unit fails any initial
Observe that the Warmzone logo is not
exposed electrical elements.
5. Measure the voltage across lines L1 and
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