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Caleffi Zone Control Relay. ZSR103
Caleffi 3-Zone Control Relay - ZSR103


Our Price: $180.00

Product Code: CAL-ZSR103

Description Technical Specs
Caleffi, ZSR series is multi-zone pump and boiler operating control for multiple zone hydronic heating systems. The ZSR series interfaces with low voltage thermostats, or any other low voltage controllers having a switching action.

The ZSR series controls up to 3, 4, 5 or 6 heating circulator pumps, depending on model selected, a primary pump and has LED indicators to provide functional status and easy system troubleshooting. In addition, a primary pump system circulator is switched on whenever any zone calls for heat.

  • Power supply: 120 VAC, 50/60 Hz
  • Transformer voltage: 24 VAC
  • Maximum transformer load: 12 VA (ZSR103/4), 20 VA (ZSR106)
  • Electrical switch rating: 20A max combined
  • Electrical switch rating pump output: 120 VAC, 5A each
  • Dry contact rating, AUX, XX, ZONE1 E/S: 120 VAC max, 2A each
  • Replaceable fuses: Type 2AG, 5A slow blow

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