1 8 |
FHP560 Controller
Applications Manual
Bosch Thermotechnology Corp.
Data subject to change
Page____ of ____
11.7 HP + 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
RATS - RETURN AIR TEMPERATURE SENSOR
REFER TO UNIT WIRING DIAGRAM FOR FURTHER DETAILS
RATS
EWTS
DATS
FHP560
Heat Pump Sequence of Operation – HP + 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.
Heat Pump Control:
When the zone temperature falls below the zone temperature setpoint the reversing valve will be disabled to provide heating when the
compressor is running. When the zone temperature rises above the zone temperature setpoint the reversing valve will be enabled to provide
cooling when the compressor is running.
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.
Once enabled, unit will run in economizer mode until the EWT exceeds 58°F (user con
fi
gurable).
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
X
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
5
3
1
1
1
2
2
Total Hardware
Total Software
10
8
2
Table 15
