Honeywell S7999D SOLA User Manual page 17

Table 10. Domestic Hot Water (DHW)
Configuration Parameters.
Parameter
Enable Disable or Enable Domestic Hot Water
Loop
Demand switch Sensor for Central Heat demand:
DHW sensor only,
DHW sensor & Remote Stat,
DHW switch & inlet sensor, or
DHW switch & outlet sensor
Priority source Which system has priority:
Disabled or
Heat Demand
Priority method Boost during priority time
Drop after priority time
Modulation sensor DHW Sensor
Outlet Sensor
Inlet Sensor
Auto: DHW (S6) or Inlet Sensor
Auto: DHW (S6) or Outlet Sensor
Setpoint -40 °F to 240 °F (-40 °C to 115 °C)
Time of day setpoint Setpoint when Time Of Day switch is
on. -40 °F to 240 °F (-40 °C to 115 °C)
Off hysteresis Differential above setpoint when boiler
is turned off. -40 °F to 240 °F (-40 °C
to 115 °C)
On hysteresis Differential from setpoint when boiler
is turned on.
2 °F to 234 °F (-16 °C to 112 °C)
DHW priority ___hour ___min ___sec
override time
Hysteresis step ___hour ___min ___sec
time
DHW priority vs CH Which system has priority:
Central Heat over Domestic Hot
Water, or
Domestic Hot Water over Central Heat
DHW priority vs Which system has priority:
Lead Lag Lead Lag over Domestic Hot Water,
Domestic Hot Water over Lead Lag
DHW P-gain Gain applied for the P portion of the
PID equation
0-400
DHW I-gain Gain applied for the I portion of the
PID equation
0-400
DHW D-gain Gain applied for the D portion of the
PID equation
0-400
Comment
DHW Storage Configuration
Table 11 displays DHW Storage configuration parameters.
Table 11. DHW Storage Configuration Parameters.
Parameter
DHW storage Enabled, Disabled
enable
Storage time ___hour ___min ___sec
Setpoint 32 °F to 250 °F (0 °C to 120 °C)
Off hysteresis 0 °F to 234 °F (-17 °C to 112 °C)
On hysteresis 0 °F to 234 °F (-17 °C to 112 °C)
DHW Plate Heat Exchanger
Configuration
Table 12 displays DHW Plate Heat Exchanger configuration
parameters.
Table 12. DHW Plate Heat Exchanger
Configuration Parameters.
Parameter
Tap detect degrees -0 °F to 180 °F (-17 °C to 82 °C)
Tap detect on ___hour ___min ___sec
recognition time
Tap detect on -0 °F to 180 °F (-17 °C to 82 °C)
threshold
Tap detect minimum ___hour ___min ___sec
on time
Tap stop inlet-DHW -0 °F to 180 °F (-17 °C to 82 °C)
degrees
Tap stop outlet-Inlet -0 °F to 180 °F (-17 °C to 82 °C)
degrees
Plate preheat -40 °F to 266 °F (-40 °C to 130 °C)
setpoint
Plate preheat on ___hour ___min ___sec
recognition time
Plate preheat on -0 °F to 180 °F (-17 °C to 82 °C)
hysteresis
Plate preheat off -0 °F to 180 °F (-17 °C to 82 °C)
hysteresis
Plate preheat detect -0 °F to 180 °F (-17 °C to 82 °C)
on threshold
Plate preheat detect -0 °F to 180 °F (-17 °C to 82 °C)
off threshold
Plate preheat ___hour ___min ___sec
minimum on time
Plate preheat delay ___hour ___min ___sec
after tap
17
Comment
Comment
65-0315—02