Bosch TW Series - WATER TO WATER UNIT CONTROLLER; Features; Unit Sensors; Modes Of Operation

Subject to change without prior notice Revised 03-11
6 720 220 047
16
TW Series / Water to Water
Operating Pressures
CHILLER MODE
Table 1 - R410A Units - Full Load
Cooling Mode Operating Pressures (PSIG)
Entering Fluid
Temp °F
Entering Source Condenser Temperature °F
75 °F 85 °F 95 °F
Suction
Pressure
Discharge
Pressure
Suction Pressure
Discharge
Pressure
Suction Pressure
Discharge
Pressure
65
99-116 290-320 107-123 325-358 107-123 370-400
55
91-107 265-311 91-107 303-350 99-116 370-400
45
76-91 265-311 76-91 295-345 83-99 358-390
BOILER MODE
Table 2 - R410A Units - Full Load
Heating Mode Operating Pressures (PSIG)
Entering Load
Deg °F
Entering Source Suction Pressure Discharge Pressure
70
40 68-83 255-290
60 99-116 270-305
80 130-145 290-325
90
40 76-91 350-380
60 99-116 358-390
80 130-165 370-400
110
40 76-91 455-480
60 99-116 470-500
80 139-165 480-575
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NOTE: Ratings are based on water ow rates stated in specication sheets. 2.4 GPM/ton on evaporator
side and 10°F ∆ T on condensor side when in the chiller mode. Boiler mode conditions are 2.4 GPM/ton on
the source side and 10°F ∆ T on load side. The values are typical and may vary between models.