3.4.7 Mains Wiring
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Do not use de-ionized water because it is corrosive to the water fittings inside the
Model 648.
Typical water hose connection
12.7mm (0.5 in)
hose barb
20 mm (25/32 in)
adjustable hose clamps
Water in
FIGURE 3-12 shows the connections required when a water valve is used. The
optional solenoid water valve is supplied mounted to a bracket which mounts to the
rear of the Model 648 as shown in FIGURE 3-12. Hose connections are made as shown
in FIGURE 3-11. When you are finished installing the cooling water hose, ensure the
hose cover is installed to prevent damage to the flow switch and copper tubing.
Water valve connection
FIGURE 3-11
FIGURE 3-12
