Grundfos UPZCP-1 is single-zone pump control relay for domestic hydronic heating systems. UPZCP-1 relay provides control when zoning with pumps or low voltage zone valves for single zone. Replaces Taco: SR501-4.
Compatible with 2-, 3-, and 4-wire low voltage controllers or thermostats
Wiring ease with 120 VAC, ground and low voltage screw terminal inputs
Low voltage end-switch output terminals for the zone valves
Front facing LED indicator lights on the cover
Side mounted terminal connections for ease of wiring and installation.
Input Power (60 Hz): 120 VAC
Transformer Voltage: 24 VAC, 40 VA, Class 2
Thermostat Output: 0.125 A
Maximum Single Phase Motor Rating (per zone): 5 A
Maximum combined load rating (output @ 120 VAC): 10 A
Temperature Range (storage): 50 - 100°F (10 - 38°C)
Temperature Range (maximum operation): 0 - 100°F (-18 - +38°C)
Maximum operating humidity range: 90% RH
Number of Knockouts: 6
Size of knockouts: 0.875" (22mm)
Dimensions (W x H x D): 5.93" x 4.80" x 2.36" (151mm x 122mm x 60mm)
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