- User Brochure
Boiler Control 262
U 262
06/99
View
1
2
1
Item
Menu
Boiler Control 262
Two Stage Boiler & DHW / Two Stage DHW
Boiler Demand
DHW Demand
°
F
Setpoint Demand
WWSD
Occ
Minimum
Maximum
R
NRTL/C
LR 58223
The Boiler Control 262 is a microprocessor based control designed to stage and rotate two on/off boiler stages
(or one low/high fire boiler) to maximize the comfort and efficiency of a hydronic heating system. The control
is designed to operate in two distinct modes. Mode 1 allows for the control to provide a reset supply water
temperature to a heating system, indirect Domestic Hot Water (DHW) generation, and the integration of a
setpoint load. Multiple zone temperature control is achieved by using either thermostats or tekmar Zone
Controls. Mode 2 is designed specifically for dedicated DHW applications in order to provide heat to a DHW
storage system. Standard features include Equal Run Time Rotation, Auto Differential, digital temperature
readouts, and pump exercising.
User Interface
Access Level(s) The tekmar Boiler Control 262 has four access levels which are LTD (limited), USER, INST (Installer), and ADV
(advanced). This brochure only covers the LTD (Limited) and USER levels. Only qualified service people should adjust the INST
(Installer) and ADV (advanced) access levels.
Item Field
Displays an abbreviated
name of the selected item
Menu Field
Displays the
current menu
View
Adjust
Monitor
Schd
Misc
Number Field
Displays the current value
of the selected item
Boiler Demand
DHW Demand
°F°
C
min
sec
UnOcc
1
DHW
2
1
Ovr
!
Setpoint Demand
hr
WWSD
Minimum
Maximum
Burner
Displays when the stage 1 and
1 2
/ or stage 2 relay is turned on.
Pump
1
Displays when the boiler pump
is operating.
DHW Pump / Valve
Displays when the DHW pump
DHW
or valve is on.
Status Field
Displays the
current status of
the control’s
inputs, outputs
and operation
Menu
Item
Buttons
Selects Menu,
{
Items and adjusts
settings
The tekmar Boiler Control 262 has a Liquid Crystal Display (LCD) and four push
buttons (
Menu, Item
, , ) which are used to view and adjust the settings.
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
reached the last available item in a menu, pressing and releasing the
Item
button. Once you have
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
use the
Additional information can be gained by observing the Status and Pointers fields 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.
Menu
button. Then select the desired item using the
and/or button to make the adjustment.
Item
button. Finally,
UnOcc
Occ
Ovr
!
°
F, °C, sec,
min, hr
Boost
Displays when the control is in
boost after setback.
UnOccupied
Displays when control is in
unoccupied mode.
Occupied
Displays when the control is in
occupied mode.
Override
Displays when the control is in
override mode.
Warning
Displays when an error exists
or a limit has been reached.
Lock - Unlock
Displays whether access
levels are locked or unlocked.
°F, °C, sec, min, hr,
Units of measurement.
Pointer
Displays control operation as
indicated by text.
Copyright © 1999 U 262 -06/991 of 4
Note: Depending on the settings the installer makes in the control, certain menu items may not appear.
Item
Item
Occ
LTD
• •
•
• •
•
•
• •
LTD
• •
USER
Current outdoor air temperature as measured by the outdoor sensor.
This is the default display for the control.
Target room air temperature. “— — —” denotes no heat is required.
Will not display if RTU is connected.
Measured room air temperature at the indoor sensor. Will not display
if RTU is connected.
Current boiler supply water temperature as measured by the boiler
sensor.
Target DHW tank temperature. This item can only be viewed if a
tekmar sensor is used to measure the DHW tank temperature.
Current DHW tank temperature as measured by the DHW tank
sensor.
USER
The desired room air temperature during an Occupied period for
zones in the heating system. Will not display if RTU is connected.
In LTD access level, this setting can only be adjusted ±3°F (±1°C).
262 View Menu
262
Adjust
Menu
Range
-67 to 149˚F
(-55 to 65˚C)
- - -, 35 to 100˚F
(2 to 38˚C)
-58 to 167˚F
(-50 to 75˚C)
-31 to 266˚F
(-35 to 130˚C)
- - -, OFF, 70 to 190˚F
(OFF, 21 to 88˚C)
-31 to 266˚F
(-35 to 130˚C)
Range
35 to 100˚F
(2 to 38˚C)
UnOcc
UnOcc
Occ
Occ
UnOcc
The desired, room air temperature during an UnOccupied period for
zones in the heating system. Will not display if RTU is connected.
•
The minimum temperature at the slab sensor, provided the control
is not in Warm Weather Shut Down. This item can only be adjusted
•
if a tekmar sensor is connected.
The amount the boiler supply water temperature will be reduced
when the control is in the UnOccupied mode.
•
Selects stage 1 as operational or not.
•
Selects stage 2 as operational or not.
•
The desired DHW storage tank’s temperature during the Occupied
period. This item can only be adjusted if a tekmar sensor is used to
•
measure the DHW tank temperature.
The desired DHW storage tank’s temperature during the UnOccupied
period.This item can only be adjusted if a tekmar sensor is used to
•
measure the DHW tank temperature.
The heating system’s warm weather shut down during the
Occupied period.
•
The heating system’s warm weather shut down during the
UnOccupied period.
•
35 to 100˚F
(2 to 38˚C)
OFF, 35 to 120˚F
(2 to 49˚C)
0 to 50˚F
(0 to 28˚C)
AUTO, OFF
AUTO, OFF
OFF, 70 to 190˚F
(21 to 88˚C)
OFF, 70 to 190˚F
(21 to 88˚C)
35 to 100˚F, OFF
(2 to 38˚C)
35 to 100˚F, OFF
(2 to 38˚C)
Copyright © 1999 U 262 -06/99
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