
12
Pellerin Milnor Corporation
length, then one second of the injection time is spent injecting air rather than chemical. If the
programmed injection time is only three seconds, then one third of the desired chemical is not
being delivered. However, if the programmed injection time is 20 seconds, the chemical de-
livery is only five percent less than desired.
•
Increasing the programmed injection time makes any variation less significant. Use pumps
and/or valves sized to allow inject times of at least 10 seconds. If injection times for a specific
chemical vary widely from one formula to another, consider using two pumps or valves for
the same chemical. Actuate one pump for injecting small quantities, and use both pumps or
valves for larger quantities.
1.5.2
Available Chemical Injection Methods
BNCJVI01.C02 0000181450 C.2 D.5 B.3 1/2/20 1:16 PM Released
All machine models are equipped with a chemical chute for the introduction of dry chemical sup-
plies directly into the bath liquor. Automatic or manual flushing is provided on most models to re-
duce the risk of corrosion. One or more other chemical injection devices, described below, are
available according to machine model.
1.5.2.1
Chemical Injection Output Signals
BNCJVI01.R02 0000181449 C.2 D.5 B.3 1/2/20 1:16 PM Released
Five discrete signals (for chemicals 1 through 5) are furnished standard on all washer extractors.
These signals are available at a terminal strip on all E-P Plus® machines. Check the nameplate
on the machine to verify the model.
Starting with E-P Plus software version WUH7JA/2200N, Milnor provides six discrete chemical
signals on H_J and X_J washer-extractors. The sixth chemical signal is between MTA3-1 (com-
mon) and MTA3-10.
1.5.2.2
Optional Five-Compartment Flushing Chemical Injector
BNCJVI01.C03 0000181448 C.2 D.5 B.3 1/2/20 1:16 PM Released
An externally mounted five-compartment dry supply injector is offered as an option on some
models. The five electrically operated flush valves are wired to chemical injection output signals
at a terminal strip on the machine (usually terminal strip TBA).
1.5.2.3
Liquid Chemical Tube Connectors
BNCJVI01.R03 0000181447 C.2 D.5 B.3 1/2/20 1:16 PM Released
A five or six port liquid chemical inlet manifold is standard equipment on most models. Use these
valveless inlets to connect tubes from remote chemical supply injection systems that are not con-
tinuously pressurized and that deliver chemicals only when an injection is commanded.
1.5.3
Considerations for Pumped Chemical Systems
BNCJVI01.C04 0000181446 C.2 D.5 C.3 1/2/20 1:16 PM Released
Pumped chemical systems deliver chemicals to the machine intermittently usually via peristaltic
pumps. Inlets on the machine must be unrestricted at all times (valveless). The supplied pumped
chemical inlets meet this requirement.
Содержание E-P Plus
Страница 2: ......