- Data Brochure
Boiler Control 262
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.
Boiler Control 262
Note:
Two Stage Boiler & DHW / Two Stage DHW
Boiler, DHW, or setpoint
demand must be powered
with 20 to 260 V (ac)
1
before the boiler is able
Boiler
to fire.
Input
Boiler
Demand
signal
Input
DHW Demand
signal
Input
Setpoint
Demand
signal
Input
120 V (ac)
Power
Supply
Output
Boiler System
Pump
M
Output
DHW Pump OR
DHW Valve
View
° F
1
1
2
Item
Menu
2
3
4
5
6
7
8
9
10
Com
DHW
Setp
Boil
DHW
Power
Dem
Dem
Dem
P1
Pmp / Vlv
N
L
Output
Output
Boiler
Setback
Boiler Demand
DHW Demand
None
Setpoint Demand
WWSD
Minimum
Operating Modes
Maximum
1 Two Stage Boiler & DHW
2 Two Stages for DHW
See product literature
INSTALLATION CATEGORY II
Made in Canada by
tekmar Control Systems Ltd.
tektra 929-03
115 V ±10% 60 Hz 900 VA
Power
Relays
230 V (ac) 7.5 A 1/3 hp, pilot duty 240 VA
Demands
20 to 260 V (ac) 2 VA
Signal wiring must be rated at least 300 V.
Wiring must be rated 194°F (90°C) minimum
Do not apply power
11
12
13
14
15
16
17
tN1/
Com
Stage
Stage
10K
tN2
1
1
2
2
Vie
° F
WWS
%
%
1
2
!
OR
Menu
Item
Input
Room
Remote
Temperature
Unit (RTU)
Module (RDM)
Boiler
1 of 36
Reset Ratio
Characterized
Heating Curve
T est
off
not testing
red
testing
red
For maximum heat,
press and hold Test
button for 3 seconds.
Meets Class B:
Canadian ICES
FCC Part 15
18 19
20
21 22
UnO
Com
DHW
Boil
Out
Sw
Vie
° F
WWS
%
%
1
2
!
Menu
Item
OR
LR 58233 E150539
Input
Display
Input
Zone Control
Copyright © D 262 -12/08
D 262
12/08
Input
Outdoor
Sensor Included
Input
Universal
Sensor Included
Input
Universal
Sensor Optional
Input
tekmar
Timer
Input
Slab Sensor
OR
Input
Indoor Sensor
70
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