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June 2001 Part No. 920525 Rev A
1. INTRODUCTION
This manual describes the service of Wayne Vista series blending and non-blending dispensers that have a
"3" in the prefix of the model number. For example, 3/V390D1/GQUY. Again, these dispensers can be iden-
tified by their model which begins with “3/V”, hereafter, referred to as 3/Vista models. The basic trouble-
shooting methods and service theory will remain the same for all models of dispensers which satisfy the
above definition. Any information which is specific to a particular model of dispenser will be shown as
specific in the text.
Non-blending dispensers included in this manual are the 3/V387, 3/V388, 3/V389, 3/V390, 3/V399 and
3/V490 models. Non-blending dispensers do not combine base products. These dispensers are multi-grade
dispensers, except for the 3/V387 single grade model.
Blending dispensers included in this manual are the 3/V580, 3/V585, 3/V590, 3/V591, and 3/V595 mod-
els. Blending dispensers combine the base products to provide a blended grade or grades. Blending dis-
pensers have two base products labeled LO and HI. These base products may be dispensed individually
and/or combined into one or more blended grades. The 3/V591 and 3/V595 models also have an additional
single-product (unblended) grade, however, the 3/V595/U does not.
3/Vista series dispensers have a new computer - and associated boards - and a sales display board mounted
on the back of the new bezel.
The new computer in 3/Vista series dispensers controls the hydraulic module that was newly designed and
introduced in the 2/Vista series. The hydraulic module consists of the iMeter Module and the Intelligent
Pulser. The iMeter Module is two meters in one assembly and contains the Intelligent Pulser.
.
FIGURE 1-1. 3/VISTA DISPENSER. Porportional valves are mounted at the iMeter outlet on 3/Vista
model dispensers.
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