Straight Hp + Cwv - Bosch FHP560 Applications Manual

Applications Manual

11.4 STRAIGHT HP + CWV

TO BACnet
MS/TP
NETWORK
TERMINATION DETAIL
RNET: SENSORS
BLACK
WHITE
GREEN
RED
LWTS
DATS
STANDARD COMPONENTS:
DATS - DISCHARGE AIR TEMPERATURE SENSOR
LWTS - LEAVING WATER TEMPERATURE SENSOR
Bosch Thermotechnology Corp.
FHP560
UNIT TERMINAL BLOCK
REFER TO UNIT WIRING DIAGRAM FOR FURTHER DETAILS
Heat Pump Sequence of Operation – HP + CWV
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
Condenser Water Valve:
Factory installed loop valve with Valve End Switch (VES) option must be confi gured by the equipment integrator. Upon a call for compressor
operation the normally closed valve is indexed to open via a 24Vac signal at BO-5. If the VES is confi gured, compressor operation is not enabled
until Valve End Switch is engaged (valve fully open).
Valve open status is verifi ed via the VES within 1.5 Mins of valve enable command.
If VES contacts do not engage within the specifi ed time, VES fail alarm is initiated. If valve opens without command from BO-5, valve in hand alarm
is initiated.
Compressor operation is disabled 20 secs after VES opens (fails) when loop valve has been indexed to open.
HEAT PUMP
Point Name
AI
Zone Temperature X
Heating Setpoint
Cooling Setpoint
Supply Fan Command
Compressor Stage 1 Output
Compressor Stage 2 Output
Reversing Valve Command
Occupied Command
Discharge Air Temperature X
Leaving Water Temperature X
Loop Valve Command
Valve End Switch (Valve Status)
Condensate Overfl ow
Lockout Alarm
Schedule
3
Totals
Table 12
Page____ of ____
Hardware Points Software Points
AO BI BO AV BV Sched
X
X
X
X
X
X
X
X X X
X
X
X X
X X
0 2 5 5 3 1
Total Hardware Total Software
10 12
FHP560 Controller | 15
Show On
Graphic
Trend Alarm
X X
X
X
X
1 2 2
2
Data subject to change