P/N 20-07665-00 Rev
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Theory of Operation
Overview
The Mercury offers four operating modes for maximum flexibility in small OPL and Top Load washer laundry
applications. Automatic Formula Selection may be used in all modes whenever a spare washer supply signal
output is available that may be programmed to the second. The following sections describe each mode’s
unique operation specifications in detail.
Automatic Mode
Automatic Mode is a basic mode of operation similar to Timer Mode in our Eclipse and Orion dispensers.
Each trigger signal input number matches the corresponding pump number (i.e. trigger 1 = pump 1, trigger 2
= pump 2, etc.). Pumps can be delayed after trigger signals for occasions where pump delays are required to
prevent dosing on dry linen, etc. Pump delay times are programmable in seconds. Pumps 1 and 2 have two
product levels, A and B. The A level dispenses on the first occurrence of the trigger signal in a formula. The
B level dispenses on the second occurrence of the same trigger signal within the same formula. Pump 3 only
has one product level. The Pump Lockout feature, when turned on, prevents any unwanted pump activations
due to false signals from washers that send noisy or multiple output supply signals. Loads are counted each
time the highest pump number with an amount programmed (unique to each formula) is run. The Pump
Lockout timer and (pumps 1 and 2) A/B levels will be reset 5 minutes after the count pump runs or the
Lockout period ends, whichever comes first. If the load needs to be restarted for any reason, the dispenser
wash formula may be terminated early by pressing the Enter key for two seconds.
Push Button Mode
Push Button Mode is intended for manual operation where the machine operator selects a formula and
presses the Enter key to start and run the dispenser wash formula. A dispenser wash formula consists of
up to 5 programmed pump amounts (1a, 1b, 2a, 2b, and 3 are the five programmable pump amounts from
three physical pumps). Pump Delay times (programmed in minutes) stagger the programmed pump doses
throughout the wash load. The Pump Lockout feature (programmed in minutes) prevents the machine
operator from starting multiple doses in the same wash load. If the load needs to be restarted, the dispenser
wash formula may be terminated early by pressing the Enter key for two seconds. Loads are counted each
time the highest pump number with a programmed amount is run.
Occurrence Mode
Occurrence Mode paces the dosing of products off the washer fill valves by counting each time the machine
fills to identify the occurrence-sequence of machine steps. This mode of operation is ideally suited for
machines with no chemical supply signal outputs, such as domestic style top load washers. While all three
of the trigger signal inputs are active and may be used, typically only two will be used. Typical trigger signal
wiring would be one of the available trigger signal inputs wired to one fill valve, and another trigger signal
input to the other fill valve (typically the hot and cold fill valves). Since the dispenser responds to any of the
trigger inputs, it does not matter which input goes to which fill valve. The dispenser counts the machine fill
occurrences and runs pumps based on an assignment of the pumps to the machine step sequence.
NOTE:
Careful attention must be paid when programming the signal Filter Duration time to account for any
spurious fills resulting from level and/or temperature controls in the washer. For more information, please
see section 4.8, Filter Duration.
A dispenser wash formula consists of up to 5 programmed pump amounts (1a, 1b, 2a, 2b, and 3 are the
five programmable pump amounts from three physical pumps). Any of these available amounts may be
programmed to any (up to 9) machine step. The Lockout feature is available to be sure that each programmed
pump amount only runs one time per dispenser wash formula. The dispenser wash formula is terminated
5 minutes after the last pump programmed in a sequence runs, or the Lockout period (when on) ends,
whichever comes first. If the load needs to be restarted for any reason, the dispenser wash formula may be
terminated early by pressing the Enter key for two seconds.
