tekmar 423 Universal Reset Module - Manual (Page 20)

© 2007 D 423 - 08/07 20 of 36
Mix Characterized Heating Curve
Terminal Unit
Mix
Design
Outdoor
Design
Mix
Indoor
Decreasing Outdoor Temperatures
Increasing Mix T
e
mper
ature
Boiler Characterized Heating Curve
Terminal Unit
Boiler
Design
Boiler
Indoor
Outdoor
Design
Decreasing Outdoor Temperatures
Increasing W
a
ter T
e
mper
atures
Boiler Outdoor Reset
There is a water temperature and therefore a characterized
heating curve for each communication bus. When using
boiler temperature water to heat zones, the installer will be
required to set a boiler characterized heating curve.
Boiler Terminal Unit Defaults
When a terminal unit is selected for boiler zones, the
control loads default values for the boiler design, boiler
maximum supply, and boiler minimum supply temperatures.
The factory defaults can be changed to better match the
installed system. Locate the Boiler Terminal Unit setting
in the Adjust Menu.
Terminal Unit BOIL DSGN BOIL MAX BOIL MIN
High Mass Radiant (1) 120°F (49°C) 140°F (60°C) OFF
Low Mass Radiant (2) 140°F (60°C) 160°F (71°C) OFF
Fancoil (3) 190°F (88°C) 210°F (99°C) 140°F (60°C)
Fin-Tube Convector (4) 180°F (82°C) 200°F (93°C) 140°F (60°C)
Radiator (5) 160°F (71°C) 180°F (82°C) 140°F (60°C)
Baseboard (6) 150°F (76°C) 170°F (77°C) 140°F (60°C)
Boiler Indoor Design
The boiler indoor design temperature is the indoor temperature
the heating designer chose while calculating the heat loss for
the boiler water heated zones. This temperature is typically
70°F (21.0°C). This setting establishes the beginning of
the boiler characterized heating curve.
•
• Locate the Boiler Indoor Design setting in the Adjust
Menu.
Boiler Design Temperature
The boiler design supply temperature is the boiler water
temperature required to heat the zones on the typical
coldest day of the year.
•
• Locate the Boiler Design setting in the Adjust Menu.
Mix 1, Mix 2 and Mix 3 Outdoor Reset
Each tN4 communication bus operates on a separate water
temperature. Therefore a separate characterized heating
curve is required for Mix 1, Mix 2 and Mix 3.
Mix 1, 2 and 3 Terminal Unit Defaults
When a terminal unit is selected for Mix 1, 2, or 3, the control
loads default values for the mix design, mix maximum supply,
and mix minimum supply temperatures. The factory defaults
can be changed to better match the installed system.
•
• Locate the Mix 1, Mix 2 and Mix 3 terminal unit settings
in the Adjust Menu.
Terminal Unit MIX DSGN MIX MAX MIX MIN
High Mass Radiant (1) 120°F (49°C) 140°F (60°C) OFF
Low Mass Radiant (2) 140°F (60°C) 160°F (71°C) OFF
Fancoil (3) 190°F (88°C) 210°F (99°C) 100°F (38°C)
Fin-Tube Convector (4) 180°F (82°C) 200°F (93°C) OFF
Radiator (5) 160°F (71°C) 180°F (82°C) OFF
Baseboard (6) 150°F (76°C) 170°F (77°C) OFF
Mix 1, Mix 2 and Mix 3 Indoor Design
The Mix 1, Mix 2 and Mix 3 indoor design temperature is
the indoor temperature the heating designer picked while
calculating the heat loss for the building for the Mix 1, Mix 2,
or Mix 3 water heated zones. This temperature is typically
70°F (21.0°C). This setting establishes the beginning of
the Mix 1, Mix 2, or Mix 3 characterized heating curve.
•
• Locate the Mix 1, Mix 2 and Mix 3 Indoor Design settings
in the Adjust Menu.
Mix 1, Mix 2, and Mix 3 Design Temperature
The Mix 1, Mix 2, and Mix 3 design supply temperature is
the mix supply water temperature required to heat the zones
when the outdoor temperature is as cold as the outdoor
design temperature.
•
• Locate the Mix 1, Mix 2 and Mix 3 Design settings in the
Adjust Menu.