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422 | Universal Reset Mofule - Two tN4, Mixing, Boiler, DHW & Setpoint | Tekmar

Brand: TekmarSKU: 422

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Overview Details for 422

Universal Reset Mofule - Two tN4, Mixing, Boiler, DHW & Setpoint

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 Temperature Reset and Indoor Temperature Feedback. It is capable of controlling a single on/off, two stage, or modulating boiler, a mixing device, Domestic Hot Water, setpoint loads, and can expand up to 24 zones in total for each heating water temperature.

Features

DHW priority (optional), expandable up to 48 zones
Boiler protection, powered pump outputs
Warm weather shut down, zone synchronization
Single on/off or modulating boiler control, variable speed, or floating action mixing control
Outdoor temperature reset, indoor temperature feedback
System setback (with optional Timer)
One touch overrides (with optional User Switch)
Automatic boiler differential, Exercising
DHW post purge, DHW control

Specifications

Item Number	422
Brand	Tekmar
Category	tekmarNet Controls
Agency Approvals	CSA C US, CSA/UL 61010-1, meets Class B: ICES & FCC Part 15
Ambient Conditions	Indoor use only, 32 to 122 degrees F (0 to 50 degrees C), Max. RH 92 percent for temperatures up to 40 degrees C, 50 percent RH at greater than 40 degrees C, Altitude less than 6560 feet (2000 m), Installation Category II, Pollution Degree 2
Boiler Relay	115 V (ac) 5 A
Combined Load	10 A Max. (for DHW, Primary, Mixing & Var. Speed Pump)
Control Type	Microprocessor PID control, this is not a safety (limit) control
Demand	20-260 V (ac) / 0.1 VA at 24 V
Dimensions	3-5/8" H x 5-3/8" W x 9/16" D (92 x 137 x 14 mm)
Enclosure Material	Does Not Apply To Product
Enclosure NEMA Rating	Does Not Apply To Product
Floating Action Load	24 V (ac) 8 VA Maximum
Hydronic - HVAC Control Type	Universal Reset Module
Modulating Output	0-10 V (dc) Minimum 2500
Power Supply	Provided by interconnected tekmarNet Zone Manager
Pump Relay	115 V (ac) 5 A, 1/6 hp
Sensor	NTC thermistor, 10k at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892
Variable Pump	115 V (ac) 2.5 A, fuse T2.5 A 250 V