Unitec Wash Select II POS Installation Manual - Manual (Page 7)

W A S H S E L E C T I I
Document Number: WS21001 1
Document Title: Wash Select II POS Installation Manual
1 Site Planning
The Wash Select II is a self-serve unattended automatic car wash entry system designed
specifically for the self-serve car wash market. The Wash Select II accepts various forms of
payment, interacts with customers at the car wash entrance, and arms the car wash.
It is important to consider a few points prior to the actual installation of the Wash Select II unit.
Among these considerations are the correct running of electrical conduit, and the proper
positioning of all of the carwash machines. In this section, these issues will be discussed in
detail. When proper planning is implemented, the Wash Select II installation will go smoothly,
and the unit will operate reliably.
1.1 Electrical Planning
1.1.1 Site Grounding Considerations:
Make sure that the protective earth ground wire does not carry any motor return current. Only
the neutral wire should carry return current.
1.1.2 Electrical Requirements of the Wash Select II
The Wash Select II will need to have 115-120 VAC on a 5-Amp dedicated breaker, which
should be provided during wash construction. Most installers will have power supplied directly
from one of the three phases used to power the wash motors and controllers. If this method is
used, special attention should be given to proper earth grounding at the unit, as well as in the
breaker panel.
Generally, most car wash manufacturers use a five-wire system to provide the arming signals
for the selected wash packages. This means that one common line and four arming input
wires are fed from the car wash’s Programmable Logic Controller (PLC) to the Wash Select II
unit. In addition to these five, a Wash-In-Use Hot and Wash-In-Use Neutral are required to
reset the wash electronics. Typically, these are also provided by the PLC. It is important to
consider this fact when planning the conduit runs, because there will need to be 2 separate
runs from the wash to the Wash Select II—one for AC power, and one for PLC Control Wires
& Optional Phone connection. If you are connecting to a POS4000 then you should have an
additional conduit run to the POS4000 (C-store), unless you have the RF option.
Another important point to remember is that the Wash Select II is equipped to accept credit
cards, so a separate run may be required from the nearest phone jack to the main conduit
run. There is no guarantee that a credit upgrade will not be performed, so the installer should
think ahead and make provisions. If there is an undedicated phone line nearby, then every
attempt should be made to try to route the conduit so that access is easily gained to it. For
example, a junction box can be placed in the run at that particular point.
If an undedicated telephone line is not nearby, try to route the conduit so that one is
accessible at a later date. An important rule to remember is that the telephone cable should