Pulsafeeder Digital Glycol Feeder DGF2 - Manual (Page 6)

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1. Introduction
The Digital Glycol Feeder (DGF), is designed to make-up for lost glycol in a closed loop system.
It accomplishes this by monitoring system pressure. When system pressure drops below a set
pressure (indicating glycol loss), the pump activates and restores the lost glycol, bringing the
system pressure back to the proper operating level.
Model DGF1 includes a control unit in a NEMA Type 4 enclosure, a 55 gallon polyethylene tank,
a level wand, a pressure switch and a positive displacement pump for controlling glycol feed in a
single loop system. The feeder is mounted on a welded stand for ease in shipment and
installation.
Model DGF2 controls a dual loop system.
Figure 1 – Typical Installation