tekmar 257 DHW Control - Manual (Page 2)

© 2009 D 257 - 03/09 2 of 12
How to Use the Data Brochure
This brochure is organized into three main sections.
They are: 1) Sequence of Operation, 2) Installation, and
3) Control Settings.
The Control Settings section of this brochure describes
the various items that are adjusted and displayed by the
control. The control functions of each adjustable item are
described in the Sequence of Operation.
The 257 uses a Liquid Crystal Display (LCD) to display
information. Use the LCD to set up and monitor the
operation of the system. The 257 has three push buttons
(Item, ▲, ▼) for selecting, viewing, and adjusting settings.
As you program the control, record the settings in the
ADJUST menu table which is found in the second half of
this brochure.
Item
The selected item will be displayed using a pointer in the
display. To view the next available item, press the Item
button. Once you have reached the last available item,
pressing the Item button again will return the display to
the first item.
Adjust
To make an adjustment to a setting in the control, press and
hold simultaneously for 1 second all three (3) buttons. The
display will then show the word PRGM. Select the desired
item using the Item button. Finally, use the ▲ or ▼ button
to make the adjustment.
User Interface
Item
Item
Table of Contents
User Interface ............................................................... 2
Display and Symbol Description ............................... 3
Sequence of Operation ................................................. 4
Powering up the Control ........................................... 4
Staging Operation .................................................... 4
Rotation ................................................................... 5
Delay ........................................................................ 5
Installation ................................................................... 6
Getting Ready .......................................................... 6
Mounting .................................................................. 6
Rough-in Wiring ....................................................... 6
Testing the Wiring .................................................... 6
Electrical Connections to the Control ....................... 7
Control Settings ............................................................ 8
DIP Switch Settings .................................................. 8
Default Menu ............................................................ 9
Program Menu ....................................................... 10
Field Test .................................................................... 11
Error Messages .......................................................... 11
Technical Data ............................................................ 12
Limited Warranty ....................................................... 12