ES-T-294
Submittal
Job ______________________________
Designer__________________________ Contact___________________________
Smart Boiler Control 294
The Smart Boiler Control 294 provides
central and indirect domestic hot
water heating or volume domestic
hot water heating by operating up to
four boilers. This can be expanded in
groups of four boilers through the use of
expansion controls up to a maximum of
sixteen boilers. The 294 operates both
condensing and non-condensing boilers
that are either modulating, single, two,
three or four-stage to provide a flexible,
cost effective hybrid boiler plant solution.
The Watts® OnSite web and mobile
applications provide real-time remote
monitoring, setting adjustments, and
notifications.
Front View
Ref In Gnd
Pressure Sens
Ref In Gnd
Pressure Sens
1
2
3
Out Sens Boiler
+ EMS
Sensor
4
5
6
Smart Boiler
Control 294
9"
(229 mm)
DHW
Sensor
7 8
9
1
2
Heat
+ Call
3
Out Sens Boiler
+ EMS
Sensor
4
DHW
+ Call
5
6
Setpoint
+ Call
DHW
Sensor
7 8
9
tN4 C
Boiler Bus
Heat
+ Call
DHW
+ Call
Setpoint
+ Call
tN4 C
Boiler Bus
Side View
+ Gnd A B+ Gnd
Expansion Boiler Modbus
Class 2 Circuits
10 11 12 13 14 15 16 17 18 19 20 21 22 23
+ Gnd A B+ Gnd
Expansion Boiler Modbus
Ethernet
Class 2 Circuits
10 11 12 13 14 15 16 17 18 19 20 21 22 23
Ethernet
24
24
FCC ID: 2AHQR-11500A
IC: 21247-11500A
Contains FCC ID:
2AC7Z-ESP32WROOM32E
QOQMGM12P0
FCC ID: 2AHQR-11500A
Contains FCC ID:
2AC7Z-ESP32WROOM32E
QOQMGM12P0
Contains IC ID:
21098-ESPWROOM32E
5123A-MGM12P0
CAN ICES-3 (A)/NMB-3(A)
Contains IC ID:
21098-ESPWROOM32E
5123A-MGM12P0
CAN ICES-3 (A)/NMB-3(A)
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)
For product literature:
Pour la documentation
du produit:
Watts.com/tekmar
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
tektra 1150-01
Designed and assembled
in Canada
DANGER
Use Copper Conductors Only
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.
For product literature:
Pour la documentation
du produit:
Watts.com/tekmar
tektra 1150-01
Designed and assembled
in Canada
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.
Boiler Mod:
Class 2 Circuits
H2061A
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
48 49Boiler
52 53 54 294
55 56
50 51 Control
Smart
Boiler 1
+ Mod
Boiler 2
+ Mod
Boiler 3
+ Mod
Boiler 2
Boiler H2061B
4
Boiler
1 Mod:
Boiler
+ Mod
Enable
Class 2 Enable
Circuits
Boiler 3
Enable
Boiler 4
Enable
Boiler 1 Boiler 2 Boiler 3 Boiler 4
Pump/Vlv Pump/Vlv Pump/Vlv Pump/Vlv
Comb System
Air Relay Pump
DHW
Pump
Power
L
N
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
Boiler 1
+ Mod
Boiler 2
+ Mod
Boiler 3
+ Mod
Boiler 4
+ Mod
Boiler 1
Enable
Boiler 2
Enable
Boiler 3
Enable
Boiler 4
Enable
Boiler 1 Boiler 2 Boiler 3 Boiler 4
Pump/Vlv Pump/Vlv Pump/Vlv Pump/Vlv
Comb System
Air Relay Pump
DHW
Pump
Power
L
N
8"
(203 mm)
Features
Specifications
• Remote access using web/mobile app
• Email, text message, push notifications
• Operates 4 boilers
• Expandable to 16 boilers
• Boiler equal runtime rotation
• Central heating with outdoor reset
• Domestic hot water heating
• DHW priority and priority override
• Setpoint heating
• tekmarNet compatible
• Condensing/non-condensing groups
• Variable primary flow
• Combustion air damper control
• Programmable setback schedule
• PID and proportional staging options
• Sequential or parallel staging
• Fixed lead and fixed last options
• Warm weather shut down
• Pressure monitoring and alert
• Setup Wizard
Smart Boiler Control 294
2-11/32"
(60 mm)
Literature
Submittal, Application, Installation and Operation Manual,
Installation Sheet, Job Record
Packaged weight
3.3 lb. (1500 g)
Dimensions
9" H x 8" W x 2-11/32" D (229 x 203 x 60 mm)
Display
5" color touchscreen
Enclosure
Blue ABS plastic, NEMA type 1
Approvals
CSA C US, FCC Part 15B, ICES-003 Class A
Indoor use only, 32 to 122°F (0 to 50°C), RH ≤90% non-condensing,
Ambient conditions Altitude < 6560 feet (2000 m), Installation Category II, Pollution Degree
2
Power supply
115 V (ac) ±10%, 60 Hz, 9 W
Relays
230 V (ac), 5A, 1/3 hp
Modulating outputs
0-10 V (dc) 500 Ω minimum load impedance
or 4-20 mA 1 kΩ max load impedance
Calls
24 V (ac) or Short
Sensor
NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
–Included
Outdoor Sensor 070, Universal Sensor 082
–Optional
tekmar type # 071, 078, 087, 088
Communications
10/100 Ethernet, WiFi 802.11n, 2.4 GHz, WPA2 encryption
Mobile App
Apple iOS 14 or higher, Android 10 or higher
Warranty
Limited 3 Year (See IOM for full warranty)
tekmar product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact tekmar Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials
without prior notice and without incurring any obligation to make such changes and modifications on tekmar products previously or subsequently
sold.
Sample Application Drawing
Sample Mechanical diagram
294
S1
S3
B4
B3
B2
B1
P6
S2
P4
P3
P2
P7
S4
P5
P1
Sample Electrical diagram
S4
S1
S2 S3
T1
T2
-
E1
C1
+ Gnd
LEGEND
Ref In Gnd
Pressure Sens
1
2
3
Out Sens Boiler
+ EMS
Sensor
4
5
6
DHW
Sensor
7 8
9
Heat
+ Call
DHW
+ Call
Setpoint
+ Call
tN4 C
Boiler Bus
+ Gnd A B+ Gnd
Expansion Boiler Modbus
Class 2 Circuits
10 11 12 13 14 15 16 17 18 19 20 21 22 23
Ethernet
24
FCC ID: 2AHQR-11500A
Contains FCC ID:
2AC7Z-ESP32WROOM32E
QOQMGM12P0
Contains IC ID:
21098-ESPWROOM32E
5123A-MGM12P0
CAN ICES-3 (A)/NMB-3(A)
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)
For product literature:
Pour la documentation
du produit:
Watts.com/tekmar
tektra 1150-01
Designed and assembled
in Canada
Use Copper Conductors Only
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.
H2061B
B1 = Boiler 1
B2 = Boiler 2
B3 = Boiler 3
B4 = Boiler 4
CA = Combustion Air Damper
C1 = Modbus Communication to Boiler
E1 = Ethernet (Optional)
P1 = Boiler Pump 1
P2 = Boiler Pump 2
P3 = Boiler Pump 3
P4 = Boiler Pump 4
P5 = System Pump
P6 = DHW Pump
P7 = Setpoint Pump
S1 = Outdoor Sensor 070
S2 = Boiler Supply Sensor 071
S3 = DHW Tank Sensor 078 (Optional)
S4 = Pressure Sensor 088 (Optional)
T1 = Central Heating Call
T2 = Setpoint Call
Smart Boiler Control 294
Boiler Mod:
Class 2 Circuits
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
Boiler 1
+ Mod
Boiler 2
+ Mod
Boiler 3
+ Mod
Boiler 4
+ Mod
Boiler 1
Enable
Boiler 2
Enable
Boiler 3
Enable
Boiler 4
Enable
Boiler 1 Boiler 2 Boiler 3 Boiler 4
Pump/Vlv Pump/Vlv Pump/Vlv Pump/Vlv
Comb System
Air Relay Pump
DHW
Pump
Power
L
N
NOTICE
L
N
G
+ -
+ -
+ -
+ -
B1 B2 B3 B4
Modulating
Boiler
Signal
T T
T T
T T
T T
B1 B2 B3 B4
On/Off
Boiler
Signal
L N
L N
G
P1
L N
G
P3
L N
P2
G
L N
G
CA
L N
P4
G
P6
L N
G
P5
G
The information contained herein
is not intended to replace the full
product installation and safety
information available or the experience of a trained product installer.
You are required to thoroughly
read all installation instructions
and product safety information
before beginning the installation of
this product.
Tel: 1-800-438-3903 • F: (250) 984-0815
tekmarControls.com
ES-T-294 2205
2 of 2
© 2022 tekmar
">
