Table of Contents
1 4 | FHP560 Controller
11.3 STRAIGHT COOL + EH
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
Data subject to change
FHP560
UNIT TERMINAL BLOCK
REFER TO UNIT WIRING DIAGRAM FOR FURTHER DETAILS
Heat Pump Sequence of Operation – STRAIGHT COOL + EH
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 confi 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. A differential prevents the unit
from cycling excessively.
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
Auxiliary electric heat:
Electric Heat (EH) option may be factory or fi eld installed and must be confi gured by the equipment integrator. Only one (1) stage of auxiliary
electric heat is supported and may be confi gured for BO-4 (single stage compressor units) or BO-5 (dual stage compressor units).
Upon a call for heating with demand greater than 90% (user confi gurable), the EH signal will be enabled to maintain setpoint at the confi gured
output as follows:
Straight cool units: enabled with no delay
Single stage heat pump units: enabled 5 mins after first stage of mechanical heat if demand is still above 90%.
Dual stage heat pump units: enabled 5 mins after second stage of mechanical heat if demand is still above 90%.
HEAT PUMP
Point Name
Zone Temperature
Heating Setpoint
Cooling Setpoint
Supply Fan Command
Compressor Stage 1 Output
Compressor Stage 2 Output
Reversing Valve Command
Occupied Command
Discharge Air Temperature
Leaving Water Temperature
Entering Water Temperature
Aux Electric Heat Output
Condensate Overfl ow
Lockout Alarm
Schedule
Totals
Table 11
Page____ of ____
Hardware Points
Software Points
AI
AO
BI
BO
AV
BV
X
X
X
X
X
X
X
X
X
X
X
X
X
4
0
1
4
3
1
Total Hardware
Total Software
9
Applications Manual
Show On
Graphic
Sched
Trend
Alarm
X
X
X
X
X
X
1
1
2
2
8
2
Bosch Thermotechnology Corp.
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