Submittal Sheet

Job __________________________
Designer ______________________
Contact _______________________
www.tekmarcontrols.com  of 2 © 20 C 423 - 0/


0/
HVAC Systems Replaces: New

7/16”
(11 mm)
The Universal Reset Module 423 is designed to operate all of the mechanical equipment in a hydronic heating system, except for
zones, coordinating their operation through network communication. It can be used in applications ranging from a single zone of
baseboard with an on/off boiler, to four temperature systems comprised of multiple fan coils, baseboard, mixed radiant floor zones,
and two modulating/condensing boilers. This control regulates up to four space heating water temperatures through Outdoor Reset
and Indoor Temperature Feedback. It is capable of controlling two on/off or modulating boilers, Domestic Hot Water, setpoint loads,
and can connect up to 24 zones for each space heating water temperature (96 in total).
See Special
Requirements
Zone or Power Manager
provides enclosure with
NEMA rating .
2–15/16”
(74 mm)
11–1/8”
(282 mm)
8–1/16”
(204 mm)
Ø 3/16” (5 mm)
7/16” (11 mm)
CL

  
Stage1/ Stage 2/
Boil Enbl Setp Enbl

  
Demand Demand
DHW Setpoint
 
DHW Primary
10 A
max
   
NPump NPump
tN4
Made in Canada
8 VA 1 VA
Boil Sens Sup / Ret
H7010A
Off / DHW Sensor
Off / tekmar Stager
Boilers On-Off / Mod
Off / Rotation
Meets Class B: Canadian
ICES & FCC Part 15
Powered
Outputs
24 V (ac)
    
Item
Menu
tektra 006-0
Demand s: 20 - 2 60 V (ac)
Relay R ating: 115 V (a c) 5 A

  
DHW 24 V (ac)
/
    
C
C
tN4
Mod2 (dc)Mod1 (dc)

C3C1+ –
C
+ –
tN4
 
C2 tN4 tN4
 
DHW Com
Boiler
 
Boil Com

Out
Do not apply p ower
Test
1 2 3
Vlv R
1/2” Knock-out
(x 16 back) (x 8 top)
(x 8 bottom) (x 2 side)

Enclosure not included! Must be installed with a tekmarNet
®
Zone Manager or Power Manager for mounting and power. Requires
tekmarNet
®
mixing expansion module(s) to provide mixing. Designed for use with tekmarNet
®
thermostats.
 ------------
Outdoor Temperature Reset
Indoor Temperature Feedback up to
96 zones
Warm Weather Shut Down
Zone Synchronization
DHW Post Purge
 ----------------
Expandable up to 96 zones
Two on/off or two modulating boiler control
Controls up to 4 water temperatures (with
use of up to 3 mix expansion modules)
DHW control
DHW Priority
Automatic Boiler Differential
Equipment Exercising
Boiler Protection
Powered pump outputs
System Setback (with optional Timer)
One touch overrides (with optional User
Switch)
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
 -----------------------------------------------------
Four tN4, Two Boilers, DHW & Setpoint
Literature D423, W423, J423, D070
Control Microprocessor PID control; This is not a safety (limit) control
Packaged weight .83 lb. (830 g)
Dimensions 3-5/8” H x 5-3/8” W x 9/6” D (92 x 37 x 4 mm)
Approvals
CSA C US, CSA/UL 600-, meets Class B: ICES & FCC
Part 5
Ambient conditions
Indoor use only, 32 to 22°F (0 to 50°C), RH 80% to 88°F
(3°C), down to 50% from 04 to 22°F (40 to 50°C), Altitude
<6560 feet (2000 m), Installation Category II, Pollution
Degree 2
Power supply Provided by interconnected Zone Manager
DHW pump relay 5 V (ac) 5 A, /6 hp
Primary pump relay 5 V (ac) 5 A, /6 hp
Combined load 0 A Maximum (for DHW and Primary Pump)
DHW valve output 24 V (ac) 8 VA Maximum
Modulation output 0-0 V (dc) Minimum 2500
Boiler relay 5 V (ac) 5 A
Demands 20-260 V (ac) / 0. VA @ 24 V
Sensors NTC thermistor, 0 k @ 77°F (25°C ± 0.2°C) ß = 3892
–Included Outdoor Sensor 070 and Universal Sensor 082
Warranty Limited 3 Year (See D423 for full warranty)
Front View Side View