DEMA ATLAS 844P
™
SERIES
LAUNDRY CONTROL
I-907 Page 5 of 17
Rev. C-33371
Auto Formula Select
One sub-option to become familiar with before wiring the STU is Auto Formula Select. This
feature allows the formula to be selected based on a trigger signal that is received from the laundry
machine. It is necessary to have a separate programmable input from the laundry machine to
correctly use the Auto Formula Select. For more information, see Auto Formula Select section in
this instruction manual.
1. CAUTION: All electrical power must be turned off to the laundry machine and any other
circuit that is to be used for this installation. Lockout and tag procedures must be observed
when installing this device. Never open the DEMA Laundry Master while power is applied.
Signals may be active from laundry machine, even with the DEMA Laundry Master power
turned off. Use appropriately rated insulated wiring, electrical fixtures and other materials
that meet all applicable electrical and building codes.
2. Connect the power to the Laundry Master. The power requirement is from 100VAC to
240VAC 50/60 Hz. Power should be applied to Laundry Master anytime the laundry machine is
on. Some laundry machines have a terminal block setup for power (see schematic or owner’s
manual for the specific machine being used). Locate the power terminal block inside the Laundry
Master enclosure. Connect “hot” or “live” wire to the terminal labeled “L1”. Connect the
“return line” to the terminal block position labeled “L2”. The ground wire MUST be
connected to a suitable earth ground point. The power line should be secured by use of proper
electrical fitting through access hole in Laundry Master enclosure. The access hole is sized to
accept a ½” conduit fitting. The power line must also be secured properly between the laundry
machine or power source and the Laundry Master according to any electrical codes that apply.
3. Connect the flush manifold. See note labeled flush switch below if a flush manifold is not being
used. If using a flush manifold, the solenoid valve that supplies the manifold must be rated for
24V DC. The valve should be connected to the output terminal position labeled “FLUSH” on the
IQ-85 control board. In addition, a manifold flush switch must be wired to the terminals labeled
“Flush SW” on the IQ-85 control board.
Flush Switch: When a flush manifold is not used, step number 3 can be skipped. However, it is
essential that a jumper be connected between the “Flush SW” terminals on the IQ-85 control
board. The jumper is installed at the factory. Examine the unit to be installed to assure that it has
the jumper installed. Without the jumper, the Laundry Master pumps will not run. If a jumper
needs to be installed, use a short piece (2-4 inches) of insulated 18GA electrical wire stripped
approximately 3/16” at each end.
