| T h e Q u a l i t y L e a d e r i n C o n d i t i o n i n g A i r |
| |
| |
| R e s i d e n t i a l S p l i t - 6 0 H z R 2 2 & R 4 1 0 A |
| R e v. : 5 J u n e , 2 0 0 8 |
| Ground-Water Heat Pump Applications |
Water Coil Low Temperature Limit Setting | Figure 9: Water Well Connections |
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.
x CAUTION! x
CAUTION! Many units installed with a factory or field supplied manual or electric shut-off valve. DAMAGE WILL OCCUR if shut-off valve is closed during unit operation. A high pressure switch must be installed on the heat pump side of any field provided shut-off valves and connected to the heat pump controls in series with the built-in refrigerant circuit high pressure switch to disable compressor operation if water pressure exceeds pressure switch setting. The field installed high pressure switch shall have a cut-out pressure of 235 psig and a cut-in pressure of 190 psig. This pressure switch can be ordered from HCI with a 1/4” internal flare connection as part number 39B0005N01.
x CAUTION! x
CAUTION! Refrigerant pressure activated water regulating valves should never be used with HCI equipment.
w w w. h e a t c o n t o l l e r. c o m | 15 |