tekmar 268 Boiler Control - Manual

- Data Brochure
Boiler Control 268
D 268
11/10
1 of 32 © 2010 D 268 - 11/10
The tekmar Boiler Control 268 can control the supply water temperature from up to 9 on / off stages based on outdoor temperature,
control for Domestic Hot Water (DHW) generation, a setpoint requirement or optionally an external input signal (0 - 10 V (dc)). A large
easy to read display provides current system temperatures and operating status. The control has outputs for a primary pump and
either a combustion air damper or alert. Based on the mode of operation selected, the control can operate different combinations of
boiler stages and boiler pumps.
Additional functions include:
• DHW demand for DHW loads
• Setpoint demand for setpoint loads
• Test sequence to ensure proper component operation
• CSA C US certified
• Setback input for energy savings
• 0 - 10 V (dc) input signal
Input
Universal Sensor
Included
Input
Universal Sensor
Included
Input
Outdoor
Sensor
Included
Input
Timer or Switch
Optional
Input
Setpoint / DHW
Demand
Input
115 V (ac)
Power Supply
Input
Boiler
Demand
Output
Primary
Pump
Output
Combustion Air
Or Alert
Output
Boiler
Output
Pump
Or
Or
Output
Boiler
Output
DHW Pump Or
DHW Valve
Or
2 1
Com
Sup Ret Sw Dem Dem DHW N – + L P1 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8
3
Boil Boil Out UnO Boil Com Setp/ Prim
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 28 27 29 30 31
Boiler Control 268
Nine Stage Boiler & DHW / Setpoint
Do not apply power
Signal wiring must be rated at least 300 V.
H2026C Alert DHW
C.A. / Power Relay Relay Relay Relay Relay Relay Relay Relay Relay 9/
Rotate Alert
Off
Fixed Last
Off
Exercise
Adv
External Input
Stand Alone
Installer
C.A.
First On / Last Off
Fixed Lead
First On / First Off
Menu Item
Boiler Demand
DHW / Setpoint Demand
WWSD
External Input Signal
Offset
Modes
1 Up to 9 On/Off Boilers
2 Up to 4 On/Off Boilers & 4 Pumps
3 Up to 4 Lo/Hi Boilers
4 Up to 3 Lo/Hi Boilers & 3 Pumps
5 Up to 3 Three Stage Boilers
6 Up to 2 Three Stage Boilers & 2 Pumps
7 Up to 2 Four Stage Boilers
8 1 Four Stage Boiler & 1 Pump
Test
off not testing
red testing
red testing paused
For maximum
heat, press &
hold Test for 3
seconds.
943-01
Made in Canada by
tekmar Control Systems Ltd.
Power 115 V ±10% 50/60 Hz 600 VA
Relays 230 V (ac) 5 A 1/3 hp
Demands 20 to 260 V (ac) 2 VA
Dat
e Code
C US
Input
0-10 V (dc)
External Signal
Or
Meets Class B:
Canadian ICES
FCC Part 15
M
Priority Override
• Installer and Advanced access levels
• Primary pump output
• Individual boiler pump outputs (in applicable modes)
• Pump exercising
• Pump purging (primary and boiler)
• Boiler demand for space heating loads
Note:
Boiler, DHW, or
setpoint demand
must be powered
with 20 to 260 V (ac)
before the boiler is
able to fire.