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tekmar 262 Boiler Control Installation User Manual

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Copyright © D 262 -

12/08

How To Use The Data Brochure

This brochure is organized into four main sections. They are: 1) Sequence

of Operation, 2) Installation, 3) Control Settings, and

4)

Troubleshooting. The Sequence of Operation section has four sub sections. We recommend reading Section A: General of the

Sequence of Operation, as this contains important information on the overall operation of the control. Then refer to the sub sections that
apply to your installation.

The

Control Settings section of this brochure illustrates the menu screens that are built into the control. These menu settings are

referenced to the specific section in the

Sequence of Operation.

User Interface

The 262 uses a Liquid Crystal Display (LCD) as the method of supplying information. You use the LCD in order to setup and monitor
the operation of your system. The 262 uses four push buttons (Menu, Item, , ) for selecting and adjusting settings. As you program
your control, record your settings in the actual settings column of the Adjust Menu. The table is found in the second half of this brochure.

Menu











All of the items displayed by the control are organized into various menus. These menus are
listed on the left hand side of the display (Menu Field). To select a menu, use the

Menu

button. By pressing and releasing the

Menu button, the display will advance to the next

available menu. Once a menu is selected, there will be a group of items that can be viewed
within that menu.

Item











The abbreviated name of the selected item will be displayed in the item field of the display.
To view the next available item, press and release the

Item button. Once you have reached

the last available item in a menu, pressing and releasing the

Item button will return the

display to the first item in the selected menu.

Adjust











To make an adjustment to a setting in the control, begin by selecting the appropriate menu
using the

Menu button. Then select the desired item using the Item button. Finally, use the

and / or button to make the adjustment.

Additional information can be gained by observing the Status field of the LCD. The status field will indicate which of the control’s outputs
are currently active. Most symbols in the status field are only visible when the View Menu is selected.

Table of Contents

User Interface ..........................................

pg 2

Description of Display Elements ............

pg 3

Sequence of Operation ............................

pg 4

Section A: General ........................

pg 4

Section B: Boiler Reset.................

pg 6

Section C: DHW ...........................

pg 10

Section D: Setpoint .......................

pg 13

Installation ...............................................

pg 14

Electrical Connections..................

pg 14

Testing The Wiring........................

pg 16

DIP Switch Settings ................................ pg 18

Reference Material: Essay E 003: Characterized Heating Curve and Reset Ratio

Access Levels ................................................ pg 19

Control Settings ............................................. pg 20

View Menu ........................................... pg 20

Adjust Menu ........................................ pg 21

Schedule Menu ................................... pg 24

Miscellaneous Menu .......................... pg 25

RTU Menu ........................................... pg 25

Testing and Troubleshooting ...................... pg 27

Monitor Menu ...................................... pg 29

Error Messages .................................. pg 31

Technical Data ............................................... pg 36

Limited Warranty ........................................... pg 36

Menu

Item

Menu

Item

Menu

Item