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Copyright © D 262 -12/08
D 262
12/08
Boiler Control 262
- Data Brochure
The Boiler Control 262 is a micro processor based control designed to maximize the comfort and efficiency of a hydronic heating system.
The control is designed to operate in two distinct modes.
MODE —1— (Two Stage Boiler & DHW) allows for the control of two separate on /off boiler stages (or one low / high fire) based on outdoor
air temperature, control for indirect Domestic Hot Water (DHW) generation and a Setpoint load. For single zone temperature control
with indoor temperature feedback, a Room Temperature Unit (RTU) or indoor sensor may be connected to the 262. Multiple zone
temperature control is achieved by using either a conventional thermostat system or by connecting a tekmar Zone Control to the 262.
MODE —2— is designed specifically for dedicated DHW applications. In Mode 2, the 262 can stage and rotate two on / off boiler stages
(or one low / high fire) in order to provide heat to a DHW storage system.
The 262 control includes a large Liquid Crystal Display (LCD) in order to view system status and operating information. The same LCD
is used when setting up and installing the control. Standard features include Equal Run Time Rotation, intelligent boiler operation, digital
temperature readouts, and pump exercising. With the addition of a monitoring feature, it is now possible to track pump and boiler running
hours, DHW tank temperature, outdoor and system high and low temperatures, boiler firing cycles, plus many other useful items.
Several energy saving features have been incorporated into the 262 such as Warm Weather Shut Down (WWSD), DHW post purge,
system setback, DHW priority and an automatic differential for boiler operation.
LR 58233
E150539
70
M
Input
120 V (ac)
Power
Supply
Input
Zone Control
Input
Indoor Sensor
Output
DHW Pump OR
DHW Valve
Input
tekmar
Timer
Output
Boiler System
Pump
Input
Slab Sensor
OR
OR
Output
Boiler
Output
Boiler
Input
Remote
Display
Module (RDM)
OR
Input
Room
Temperature
Unit (RTU)
ItemMenu
°
F
Vie
!
WWS
1
%%
2
ItemMenu
°
F
Vie
!
WWS
1
%%
2
Input
Setpoint
Demand
signal
Input
DHW Demand
signal
Input
Boiler
Demand
signal
Input
Universal
Sensor
Included
Input
Universal
Sensor
Optional
Input
Outdoor
Sensor
Included
2
1
°
F
View
7
Power 115 V
±
10% 60 Hz 900 VA
Relays 230 V (ac) 7.5 A 1/3 hp, pilot duty 240 VA
Demands 20 to 260 V (ac) 2 VA
Made in Canada by
tekmar Control Systems Ltd.
tektra 929-03
Test
not testing
testing
off
red
red
231
Com
Dem
4
10
Boiler
Boil
P1
Power
Boiler Control 262
Two Stage Boiler & DHW / Two Stage DHW
Signal wiring must be rated at least 300 V.
Wiring must be rated 194°F (90°C) minimum
6
9
DHW
Pmp / Vlv
DHW
Dem
Setp
Dem
5
12
Stage
11
NL
8
For maximum heat,
press and hold
Test
button for 3 seconds.
Operating Modes
1 Two Stage Boiler & DHW
2 Two Stages for DHW
14
Stage
13
Boiler Demand
DHW Demand
Setpoint Demand
WWSD
Minimum
Maximum
11 2 2
Reset Ratio
Setback
Characterized
Heating Curve
None
Menu
Item
1
Note:
Boiler, DHW, or setpoint
demand must be powered
with 20 to 260 V (ac)
before the boiler is able
to fire.
Meets Class B:
Canadian ICES
FCC Part 15
H1109F
Date Code
See product literature
INSTALLATION CATEGORY II
16
DHW
17
Com
18 19
10K Out
20
tN1/
tN2
15
UnO
Sw
21 22
Boil
Com
Do not apply power
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