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FHP560 Controller
Applications Manual
Bosch Thermotechnology Corp.
Data subject to change
Page____ of ____
11 Common Applications
11.1 HP Basic
UNIT TERMINAL BLOCK
TO BACnet
MS/TP
NETWORK
LWTS
DATS
RED
GREEN
WHITE
BLACK
TERMINATION DETAIL
RNET: SENSORS
ZS COMBO SENSOR (TEMP ONLY)
STANDARD COMPONENTS:
DATS - DISCHARGE AIR TEMPERATURE SENSOR
LWTS - LEAVING WATER TEMPERATURE SENSOR
REFER TO UNIT WIRING DIAGRAM FOR FURTHER DETAILS
FHP560
Heat Pump Sequence of Operation – HP Basic
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. Fan
operation is interlocked with heating and cooling operations. The fan may be con
fi
gured for continuous operation during occupancy or for
operation based on heat/cool calls.
Zone Control:
The compressor will cycle to maintain the zone temperature at setpoint. To prevent short cycling there will be a 5 minute delay between
compressor stages. Additionally there’ll be a 1-minute delay when transitioning between heat and cool modes. The compressor will run subject to
internal safeties and controls provided by the upm.
Zone temperature may be supplied by a space ZS sensor, remote mounted sensor, or from a network value. All setpoints are adjustable via a
network, space ZS sensor Pro or plus, or with the BACview terminal. The ability to adjust setpoint from the space sensor, and the adjustment limit
(d/-3 degress f) may be modi
fi
ed via a network or BACview.
Heat Pump Control:
When the zone temperature falls below the zone temperature setpoint the reversing valve(s) 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.
A networked “loop valve enable” point must be enabled to allow compressor operation. This point is defaulted “on” from factory.
Night Setback:
When in “unoccupied”, the unit will cycle as necessary to maintain the night setback zone temperature at setpoint. A differential prevents the unit
from cycling excessively. During unoccupied operation the fan will only cycle to maintain a heat or cool 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
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
Condensate Over
fl
ow
X
Lockout Alarm
X
Schedule
Totals
3
0
1
4
3
1
1
1
2
2
Total Hardware
Total Software
8
8
2
Table 9
WARNING:
These diagrams are for reference purposes only. Please
refer to the actual unit wiring diagram for speci
fi
c details
on how to wire your heat pump unit.
