tekmar 256 Boiler Control - Manual

The Boiler Control 256 is designed to control a single stage heat source in order to provide outdoor reset. The control has a Liquid
Crystal Display (LCD) to view system status and operating information.
• Test sequence to ensure proper boiler operation
• Setback input for energy savings
• CSA C US certifi ed (approved to applicable UL standards)
Additional functions include:
• Quick Setup for easy installation and programming of control
• User comfort adjustment to increase or decrease building space
temperature
• Advanced settings to fi ne-tune building requirements
- Installation & Operation Manual
Boiler Control 256
D 256
07/11
1 of 20 © 2011 D 256 - 07/11
Input
Outdoor Sensor
Included
Input
Universal Sensor
Included
Input
24 V (ac)
Power Supply
Output
Boiler
Input
tekmar Timer
Optional
BOIL F
OCC
Input
Boiler Demand
Signal PRGM
S
T I M E AMPM UNOCC OVR S M W T F T
1
2
Press & Release:
all 3 buttons, to adjust menu
Press & Hold:
Item, to view settings
, to test.
Boiler Control 256
One Stage Boiler
Item
Dat
e Code
Power: 24 V ±10% 50/60 Hz
3 VA Class 2
Relay: 240 V (ac) 5 A 1/6 hp
Meets Class B:
Canadian ICES
FCC Part 15
H1
190D
Terminal Unit Boiler Demand
Ins
t / A
dv
1
Boil
2
Out
3
Com
4
UnO
Sw
5
Boiler
6 7
T
8
Power
R+
9
C-
Do not apply power
tektra 909-01
Designed &
Assembled in
Canada
Signal wiring
must be rated
at least 300V
Note:
Boiler demand must have
an electrical closure
between terminals 7
and 9 before the boiler
is able to fire.