Bell & Gossett 210668B Z-4M - Manual (Page 5)

Mix Reset Control Display Parameters
Display Parameter Notes
OUTDOOR Current outdoor air temperature as measured by the outdoor sensor. This is also the
TEMP default display for the control. (OUTDOOR DSGN ≠ OFF)
MIX Current mixed supply water temperature as measured by the mixing sensor
TEMP
MIX TARGET Target mixed supply is the temperature the control is currently trying to maintain at the
TEMP mixing sensor
BOILER Current boiler temperature as measured by the boiler sensor. (Boiler sensor is present)
TEMP
Mix Reset Control Set-Up Parameters (continued)
Field
Display Parameter Definition Range Notes Setting
MIX DESIGN MIX water tempera- 70°F to 220°F Recommended Settings
TEMP perature required (21°C to 93°C) High Mass Radiant (e.g., concrete):
to heat the building 120°F (49°C)
when outdoor Low Mass Radiant (e.g., wood floor):
temperature is equal 140°F (60°C)
OUTDOOR DESIGN Fancoil: 190°F (88°C)
TEMP Fin Tube Convector: 180°F (82°C)
Radiator: 160°F (71°C)
Baseboard: 150°F (66°C)
BOILER Minimum water OFF Recommended Settings
MINIMUM temperature to be 80°F to 180°F Cast iron boiler: 150°F
TEMP returned to boiler (27°C to 82°C) Copper tube boiler: 140°F
Condensing boiler: OFF
Electric boiler: OFF
Note: Refer to boiler installation
instructions to determine the minimum
allowable return temperature
WARM Outdoor tempera- 35°F to 100°F When the outdoor temperature exceeds
WEATHER ture above which (1°C to 37°C) the WWSD setting, the controller will not
SHUTDOWN the controller will OFF enable the boiler. It is typical to set the
TEMP not activate the WWSD value equal to the ROOM
boiler DESIGN TEMP. The OFF setting defeats
the WWSD logic
ENGLISH/ Parameters to be °F or °C
METRIC displayed in
Farenheit or
Celsius
ESCAPE Exit set up menu — To escape the set up menu, press either
the
or key
ADJUST
BOIL ° F
MIN
ADJUST
° F
ADJUST
Display Fault Notes
EEPROM The control was unable to read a piece of information from its EEPROM. This error can
FAULT be caused by a noisy power source. The control will load the factory defaults and stop
operation until all the settings are verified
OUTDOOR The control is no longer able to read the outdoor sensor due to a short circuit. In this
SENSOR case, the control assumes an outdoor temperature of 32°F (0°C) and continues operation.
SHORT Check wiring between outdoor sensor and control unit. Verify all connections and inspect
CIRCUIT wire insulation and sensor for damage. To clear the error message from the control after
the sensor has been repaired, press the Item button
Mix Reset Fault Messages
VIEW
VIEW OUTDR