Comfort-Aire HBH Series 6-10 Tons - Manual (Page 17)

Heat Controller, Inc. HBH SERIES IOM Manual
16
Water Coil Low Temperature Limit Setting - For all open
loop systems the 30°F [-1.1°C] FP1 setting (factory setting-
water) should be used to avoid freeze damage to the unit. See
“Low Water Temperature Cutout Selection” in this manual for
details on the low limit setting.
Figure 10: Typical Open Loop/Well Application
Shut-Off
Valve
Boiler
Drains
Flow
Regulator
Water In
Water Out
Water
Control
Valve
Optional
Filter
P/T Plugs
Pressure
Tank