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Control Description The Universal Reset Module 422 provides outdoor reset to a hydronic heating system in order to maximize comfort and efficiency. The 422 can operate a single on / off boiler or a single modulating boiler. The 422 can override the outdoor reset water temperature to provide Domestic Hot Water or Setpoint operations. The 422 can operate two outdoor reset water temperatures, either one boiler water temperature and a single mix water temperature, or two mix water temperatures. To operate two mixing devices, a Mixing Expansion Module must be connected to the 422. The single mix output can operate a floating action mixing valve or a variable speed injection pump.
Control Microprocessor PID control; This is not a safety (limit) control
Packaged Weight 1.9 lb. (1638 g)
Dimensions 3-5/8" H x 5-3/8" W x 9/16" D (92 x 137 x 14 mm)
Approvals CSA C US, CSA/UL 61010-1, meets Class B: ICES and FCC Part 15
Ambient Conditions Indoor use only, 32 to 122¼F (0 to 50¼C).
RH equal to or less than 80% to 88¼F (31¼C), down to 50% from 104 to 122¼F (40 to 50¼C)
Altitude <2000 m, Installation Category II, Pollution Category 2
Power Supply Provided by interconnected Zone Manager
DHW Pump Relay 115 V (ac) 5 A 1/4 hp, pilot duty 240 VA
Primary Pump Relay 115 V (ac) 5 A 1/4 hp, pilot duty 240 VA
Mixing P1 Pump Relay 115 V (ac) 5 A 1/4 hp, pilot duty 240 VA
Variable Speed Pump 115 V (ac) 2.5 A 1/6 HP, fuse T2.5 A 250 V
Combined Load 10 A Maximum (for DHW, Primary, Mixing and Variable Speed Pump)
Floating Action Output 24 V (ac) 8 VA Maximum
Modulation Output 0-10 V Minimum 2500 Ω
Boiler Relay 115 V (ac) 5 A 1/4 hp, pilot duty 240 VA
Demands 20-260 V (ac) / 0.1 VA @ 24 V
Sensors NTC thermistor, 10 kΩ @ 77¼F (25¼C ¼0.2¼C) +=3892
   Included Outdoor Sensor 070 and 2 of Universal Sensor 082
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Boiler Reset



Width (Inches):




User Interface:


Push Button



Depth (Inches):


Ambient Conditions:

Indoor Only: 32°-122°F RH equal to or less than 80% to 88F;50% from 104-122F Altitude<2000m

Power Supply:

From Interconnected Zone Manager


115 V (ac) 5 A-1/4 hp- pilot duty 240 VA;10 A Maximum

Max Temp (F):


Min Temp (F):


Temperature Range (F):

-76°F - 266°F


0-10 V Minimum 2500 Ohms

24 V (ac) 8 VA Max


NTC Thermistor 10 k ohm @ 77°F


070 Sensor

(2) 071 Sensors

Weight (lbs):

1.75 lbs


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