Submittal Sheet

Job __________________________
Designer ______________________
Contact _______________________
www.tekmarcontrols.com  of 2 © 20 C 422 - 0/
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0/
HVAC Systems Replaces: New
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The Universal Reset Module 422 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 multiple fan coils, mixed radiant floor zones, and a modulating/condensing boiler. This control regulates up
to two heating water temperatures through Outdoor Reset and Indoor Temperature Feedback. It is capable of controlling a single
on/off, dual stage, or modulating boiler, a mixing device, Domestic Hot Water, setpoint loads, and can connect up to 24 zones in total
for each heating water temperature.

Enclosure not included! Must be installed with a tekmarNet
®
Zone Manager or Power Manager for mounting and power.
 ------------
Outdoor Temperature Reset
Indoor Temperature Feedback up to
48 zones
Warm Weather Shut Down
Zone Synchronization
DHW Post Purge
 ----------------
Expandable up to 48 zones
Single on/off or modulating boiler control
Variable Speed, or Floating action mixing
control
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)
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 -----------------------------------------------------
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)
7/16” (11 mm)
CL
7/16”
(11 mm)

             
Boiler DHW Setpoint C C2 tN4 C Com Boil Mix Com Out+Opn Cls
Demand Demand 24 V (ac) Boil/Mix2 R R Mod (dc)
R
    
–
Primary Mix Sys P1
10 A
max.
   
N N
DHW Variable Speed
   
Pump Pump
NPump NPump
tN4
H7008B
tN4 Boiler / Mix 2
Boil Sens Sup / Ret
Boiler On-Off / Mod
Off / tekmar Stager
Off / Flushing
Powered OutputOutput 1 VA
Floating Output:
24 V (ac) 8 VA
Made in Canada
Meets Class B: Canadian
ICES & FCC Part 15
Test
Var. Pump Fuse
T2.5 A 250 V
    
Item
Menu
tektra 99-03
Var. Pump: 115 V (ac) 2. 5 A
Demand s: 20 - 2 60 V (ac)
Relay R ating: 115 V (a c) 5 A
/

2.5 A
Ø 3/16” (5 mm)
1/2” Knock-out
(x 16 back) (x 8 top)
(x 8 bottom) (x 2 side)
Two tN4, Mixing, Boiler, DHW, & Setpoint
Literature D422, W422, J422, D070
Control Microprocessor PID control; This is not a safety (limit) control
Packaged weight .87 lb. (848 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), Max. RH 92% for
temperatures up to 40°C, 50% RH at > 40°C, Altitude <6560
feet (2000 m), Installation Category II, Pollution Degree 2
Power Supply Provided by interconnected (required) Zone Manager
DHW Pump Relay 5 V (ac) 5 A, /6 hp
Primary Pump Relay 5 V (ac) 5 A, /6 hp
Mixing P Relay 5 V (ac) 5 A, /6 hp
Var. Speed Pump 5 V (ac) 2.5 A, fuse T2.5 A 250 V
Combined Load 0 A Max. (for DHW, Primary, Mixing & Var. Speed Pump)
Floating Action 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, 0k @ 77°F (25°C ± 0.2°C) ß=3892
–Included Outdoor Sensor 070 and 2 of Universal Sensor 082
Warranty Limited 3 Year (See D422 for full warranty)
Front View Side View