Tekmar 374 Universal Reset Control – Two Mixing – Two Stage Boiler – Domestic Hot Water & Setpoint

Description

Tekmar 374 Universal Reset Control – Two Mixing – Two Stage Boiler – Domestic Hot Water & Setpoint

Features:

• DHW pump or valve operation, DHW priority (optional)
• 3 Outdoor temperature reset controlled water temperatures, control up to 2 on/off boilers
• Equal run time rotation, 2 X variable speed pump outputs or 2 X floating action mixing outputs
• Quick setup for easy installation, user comfort adjustment to increase or decrease building space temperature
• Boiler load reset, automatic boiler differential
• Outdoor temperature reset, warm weather shut down
• CSA C US certified (approved to applicable UL standards)
• Advanced settings to fine-tune building requirements, test sequence to ensure proper operation
• Powered boiler system and mixing system pump outputs, exercising

Specifications:

• Agency Approvals – CSA C US, meets class B: ICES & FCC Part 15
• Ambient Conditions – Indoor use only, 32 to 122 degrees F (0 to 50 degrees C), RH less than or equal to 90 percent Non-condensing, Altitude less than 6560 ft. (2000 m), Installation Category II, Pollution Degree 2
• Control Type – Microprocessor control, this is not a safety (limit) control
• Demand – 20 to 260 V (ac) 2 VA
• Dimensions – 6-5/8″ H x 7-9/16″ W x 2-13/16″ D (170 x 193 x 72 mm)
• Enclosure Material – Blue PVC plastic
• Enclosure NEMA Rating – NEMA 1
• Hydronic – HVAC Control Type – Universal Reset Control
• Power Supply – 115 V (ac) plus / minus 10 percent, 50/60 Hz, 1750 VA
• Variable Pump – 230 V (ac) 2.4A 1/6 hp, fuse T2.5 A 250 V
• Relay – 230 V (ac) 5 A, 1/3 hp, pilot duty 240 VA
• Zone Valve Load – 89 VA, 24 V (ac), 3.7 A for zones 1 to 4
• Sensor – NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892

Installation Manual