Watts Tekmar 256 User Manual

Press and release the Item button to advance to the units adjustment. Use the or button to set the scale
to °F or °C.
To exit the ADJUST menu, press and release the Item button to advance to the ESC item. Then either press
the or button, or leave the buttons alone for 20 seconds.
ADVANCED / INSTALLER
The Advanced / Installer DIP switch is used to select which items are available to be viewed and / or adjusted
in the user interface.
To enter the Installer programming mode, set the Advanced / Installer DIP switch to Installer.
Access the ADJUST menu by pressing and holding simultaneously for 1 second, all 3 buttons. The display will now show the word
ADJUST in the top right corner.
The ROOM OCC adjustment is the first item displayed. Use the or button to set the ROOM temperature.
The ROOM OCC setting is set to the desired room air temperature during the occupied (Day) mode.
Note: To increase or decrease space temperature during the occupied (Day) mode, only adjust the ROOM
OCC setting.
Press and release the Item button to advance to the ROOM UNOCC adjustment. Use the or button to
set the desired temperature. The ROOM UNOCC setting is set to the desired room air temperature during
the unoccupied (Night) mode.
Note: To increase or decrease space temperature during the unoccupied (Night) mode, only adjust the ROOM
UNOCC setting. This is only used if a tekmar timer is installed.
Press and release the Item button to advance to the OUTDR DSGN adjustment. Use the or button to
set the outdoor design temperature. The OUTDR DSGN setting is set to the typical coldest temperature of
the year.
Press and release the Item button to advance to the Terminal Unit adjustment. Use the
or button to select
the desired terminal unit. The terminal unit number corresponds to the type of terminal that is being used to
heat the space. The table below lists the terminal units and their default values.
DIP Switch Setting
Quick Setup
© 2019 tekmar 256
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ADJUST
ADJUST
F
°
Te rminal Unit
ADJUST
ADJUSTDSGN
OUTDR
F
°
ROOM
OCC
UN
ADJUST
F
°
ROOM
OCC
ADJUST
F
°
Inst/Adv
Do not apply power
Boi l
Out
Com
UnO
Sw
1234
Terminal Unit
High Mass Radiant
(1)
Low Mass Radiant
(2)
Fancoil
(3)
Fin-tube Convector
(4)
Radiator
(5)
Baseboard
(6)
BOIL DSGN 120°F (49°C) 140°F (60°C) 190°F (88°C) 180°F (82°C) 160°F (71°C) 150°F (66°C)
BOIL MIN OFF OFF 140°F (60°C) 140°F(60°C) 140°F (60°C) 140°F (60°C)

Watts Tekmar 256 Specifications

General

Brand	Watts
Model	Tekmar 256
Category	Control Unit
Language	English