Applications Manual FHP560 Controller
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Bosch Thermotechnology Corp.
Data subject to change
Page____ of ____
11.8 STRAIGHT COOL + ECONOMIZER
UNIT TERMINAL BLOCK
TO BACnet
MS/TP
NETWORK
LWTS
STANDARD COMPONENTS:
DATS - DISCHARGE AIR TEMPERATURE SENSOR
LWTS - LEAVING WATER TEMPERATURE SENSOR
EWTS - ENTERING WATER TEMPERATURE SENSOR
REFER TO UNIT WIRING DIAGRAM FOR FURTHER DETAILS
EWTS
DATS
FHP560
RED
GREEN
WHITE
BLACK
TERMINATION DETAIL
RNET: SENSORS
Heat Pump Sequence of Operation – STRAIGHT COOL + ECONOMIZER
Supply Fan Start/Stop:
The supply fan will be started according to the schedule. After the supply fan has been started the control sequence will be enabled.
Zone Control:
The compressor will cycle to maintain the zone temperature at setpoint.
Straight Cool Control:
Unit is con
fi
gured for mechanical cooling only and the reversing valve is not installed. BO-2 is disabled and unused.
Night Setback:
When in “unoccupied”, the unit will cycle as necessary to maintain the night setback zone temperature at setpoint.
Shutdown:
When the unit is shutdown by either a stop command or system safety the unit will be set as follows:
Supply fan will be on (user configurable)
Compressor(s) will be off
Economizer:
Water Side Economizer (WSE) option must be con
fi
gured by the equipment integrator. A factory installed Entering Water Temperature (EWT)
sensor in IN-5 (IN-2 if IEM is present) is used to enable the economizer mode during cooling operations.
Entering water temperature values below 55°F (user con
fi
gurable) will enable economizer mode.
A 3-way economizer valve is required for the WSE option and is connected to BO-5.
HEAT PUMP
Point Name
Hardware Points
Software Points
Show On
Graphic
AI
AO
BI
BO
AV
BV
Sched
Trend
Alarm
Zone Temperature
X
X
X
X
Heating Setpoint
X
Cooling Setpoint
X
Supply Fan Command
X
Compressor Stage 1 Output
X
Compressor Stage 2 Output
X
Reversing Valve Command
Occupied Command
X
X
X
X
Discharge Air Temperature
X
Leaving Water Temperature
X
Entering Water Temperature
X
Economizer Valve Output
X
Condensate Over
fl
ow
X
Lockout Alarm
X
Schedule
Totals
4
0
1
4
3
1
1
1
2
2
Total Hardware
Total Software
9
8
2
Table 16
