Watts tekmar 294 - Wiring Schematic

6
IOM-T-294 2205 © 2022 tekmar
This section provides a wiring schematic for the control.
FCC ID: 2AHQR-11500A
Contains FCC ID:
2AC7Z-ESP32WROOM32E
QOQMGM12P0
Contains IC ID:
21098-ESPWROOM32E
5123A-MGM12P0
CAN ICES-3 (A)/NMB-3(A)
Class 2 Circuits
Boiler Mod:
Class 2 Circuits
Input Power:
115 V (ac) ±10%, 60 Hz, 9 W
Relays:
230 V (ac), 5 A, 1/3 hp
Calls:
24 V (ac) or Short
Operating Temperature:
32°F to 122°F (0°C to 50°C)
Use Copper Conductors Only
2827
Boiler 2
2625
Boiler 1
24
Ethernet
3029
Boiler 3
3231
Boiler 4
3433
Boiler 1
Enable
3635
Boiler 2
Enable
3837
Boiler 3
Enable
4039
Boiler 4
Enable
4241
Boiler 1
Pump/Vlv
4443
Boiler 2
Pump/Vlv
4645
Boiler 3
Pump/Vlv
4847
Boiler 4
Pump/Vlv
50
49
Comb
Air Relay
5251
System
Pump
5453
DHW
Pump
5655
Power
N
DANGER
DANGER
To Reduce the Risk of Electric
Shock - Do not connect to a
circuit operating at more than
150 volts to ground.
Pour réduire les risques
d'électrocution choc - ne pas
raccorder à un circuit
fonctionnant à plus de 150 V à
la terre.
L
54
Out Sens
76
Boiler
Sensor
98
DHW
Sensor
1110
Heat
1312
DHW
1514
Setpoint
1716
tN4
Boiler
Bus
19 2018
+ Gnd
Expansion
22 2321
ACB+ Gnd
Boiler Modbus
231
Ref In Gnd
Pressure Sens
Mod
+
Mod
+
Mod
+
Mod
+
Call
+
Call
+
Call
+
EMS
+
H2061B
Smart Boiler Control 294
For product literature:
Pour la documentation
du produit:
Watts.com/tekmar
tektra 1150-01
Designed and assembled
in Canada
N
G
L
L
NG
L
NG
L
NG
L
NG
L
NG
L
NG
tN4 C -+Gnd -+Gnd
L
NG
+
-
+
-
+
-
+
-
TT TT TT TT
Wiring Schematic
• Before wiring, ensure all power is turned off and take all
necessary precautions.
• Sensor wiring may be extended to a total length of 500
feet (152 m) using 18 AWG solid conductor wire.
• Strip all wiring to a length of
3
⁄8 in. or 10 mm for all terminals.
• A circuit breaker or power disconnect that provides power
to the control should be located nearby and clearly labeled.
• Refer to the current and voltage ratings at the back of this
brochure before connecting devices to this control.
• Only qualified personnel should install or service the control.