Honeywell Local Operator Interface S7999B - Manual (Page 23)

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE
23 65-0303—05
Domestic Hot Water (DHW)
Configuration Parameters
(R7910A Hydronic Control Only)
Table 11 displays Domestic Hot Water (DHW) configuration
parameters.
Fig. 41. Domestic Hot Water (DHW) configuration.
DHW Storage Configuration
Table 12 displays DHW Storage configuration parameters.
DHW Plate Heat Exchanger
Configuration
Table 13 displays DHW Plate Heat Exchanger configuration
parameters.
Table 11. Domestic Hot Water (DHW)
Configuration Parameters.
Parameter Comment
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
override time
___hour ___min ___sec
Hysteresis step
time
___hour ___min ___sec
DHW priority vs CH Which system has priority:
Central Heat over Domestic Hot
Water, or
Domestic Hot Water over Central Heat
DHW priority vs
Lead Lag
Which system has priority:
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
Table 12. DHW Storage Configuration Parameters.
Parameter Comment
DHW storage
enable
Enabled, Disabled
Storage time ___hour ___min ___sec
Setpoint -40 °F to 266 °F (-40 °C to 130 °C)
Off hysteresis -0 °F to 180 °F (-17 °C to 82 °C)
On hysteresis -0 °F to 180 °F (-17 °C to 82 °C)
Table 13. DHW Plate Heat Exchanger
Configuration Parameters.
Parameter Comment
Tap detect degrees -0 °F to 180 °F (-17 °C to 82 °C)
Tap detect on
recognition time
___hour ___min ___sec
Tap detect on
threshold
-0 °F to 180 °F (-17 °C to 82 °C)
Tap detect minimum
on time
___hour ___min ___sec
Tap stop inlet-DHW
degrees
-0 °F to 180 °F (-17 °C to 82 °C)
Tap stop outlet-Inlet
degrees
-0 °F to 180 °F (-17 °C to 82 °C)
Table 11. Domestic Hot Water (DHW)
Configuration Parameters. (Continued)
Parameter Comment