Submittal Sheet
Below is a sample application drawing for this product. This application may include other tekmar products that are required
for installation. More sample applications can be found at www.tekmarcontrols.com.
Sample Electrical diagram
Sample Mechanical diagram
Product design, software and literature are Copyright © 20 by:
tekmar Control Systems Ltd. and tekmar Control Systems, Inc.
2 of 2
All specifications are subject to change without notice.
Printed in Canada. C 274 - 0/.
tekmar Control Systems Ltd., Canada, tekmar Control Systems, Inc., U.S.A.
274
070
Demands
Setback
Boiler Control 274
One tN4, Four Stage Boiler & DHW / Setpoint
Menu Item
Test
Boiler Demand
DHW / Setpoint Demand
Proof Demand
EMS Input Signal
Priority Override
Power 115 V ±10% 60 Hz 7 VA, 1150 VA max.
Relays 230 V (ac) 5 A 1/3 hp
Demands 20 to 260 V (ac) 2 VA
Made in Canada by
tekmar Control Systems Ltd
tektra 1020-02
Meets Class B:
Canadian ICES
FCC Part 15
For maximum heat,
press and hold Test
button for 3 seconds.
not testing
testing
testing paused
off
red
red
Off
EMS
Rotate
Fixed Last
Pump Sequencer
Exercise
Off
Date Code
H2050A
Signal wiring must be rated at least 300 V.
DHW
23
/Setp
Com
24
Dem
Pr.
25
Dem
2 51 3
–
+
4 6
BRet/
ComtN4
Boil
OutCom Prim
P1 L N
20
Power
222187
Do not apply power
18
DHW
/ P2
17 19109 1211 1413 1615
Fixed Lead
First On / Last Off
First On / First Off
Relay
1
Relay
2
Relay
3
Relay
4
C.A. /
Alert
Boiler
Demand
Sup
DHW
Zone Load Shedding
1 Up to 4 On/Off Boilers
2 Up to 2 On/Off Boilers & 2 Pumps
3 Up to 2 Lo/Hi Boilers
4 1 Lo/Hi Boiler & 1 Pump
5 1 Three Stage Boiler & Pump
6 1 Four Stage Boiler
Modes
VIEW
C
R