Product Overview

ManualsBrandsCaleffi ManualsHeating Supplies1 Zone Expandable Switching Relay w/ Priority

Function

Code ZSR101 Z-one

™

Relay switching relay ..............................................................................................................................................single zone

Product range

CALEFFI

Z-one™ Relay

single zone switching relay

ZSR101

Materials

Housing plastic: ABS

Front display lights: LED

Electrical knockouts (6) 1/2" size

Performance

Power supply: 120 VAC, 50/60 Hz

Transformer voltage: 24 VAC

Maximum transformer load: 6 VA

Temperature limits for:

Shipping and storage max: 110°F (43°C)

Maximum operating: 110°F (43°C)

Maximum humidity: 90% non-condensing

Electrical switch rating: 10A Max combined

Replaceable fuses: Type 2AG, 5A slow blow

Approvals: ETL Certiﬁ ed to CSA C22-2 No.24, Conforms to UL873

Technical specifications Dimensions

Features

ZSR101

PWR

ZONE

Single DPDT relay

ZSR101

Single DPDT relay - Input: 120VAC 50/60Hz 10A MAX

Conforms

to UL 873

4009064

CAUTION: RISK OF ELECTRIC SHOCK - DISCONNECT ALL

INPUT POWER PRIOR TO SERVICING

Milwaukee, WI 53208 USA

Code Zones A B C Wgt. (lbs)

ZSR101 1 5

3/8" 4 5/8" 2 5/8" 1.1

B C

4009064

Certified to CSA C22-2 No.24

Conforms to UL Standard 873

• Compatible with 2, 3 and 4-wire thermostats or other low voltage

controllers with switching action

• 120 VAC input

• Heavy duty, sealed, DPDT, fuse protected relay (with spare fuse)

• Two outputs (Relay 1 and Relay 2) for operating 120 VAC pump

with boiler enable, or two devices without boiler enable

• 5 A capacity each relay - 10 A total

• Convenient R,W,C and T,T,COM dual labeling at thermostat

terminals

• Rear knock-outs for mounting onto 4” x 4” junction box

• High capacity 6 VA transformer

• Automatic resettable fuse on 24 V circuit

• Simpliﬁed wiring with pre-installed jumper

• Large screw terminals. On-board ground terminals

• Front panel LED indicator light for functional status

• 100% factory tested with 3 year warranty

• ETL certiﬁed to CSA and UL standards

The ZSR101 single zone switching relay is operated by low voltage

thermostats. The ZSR101 single zone switching relay incorporates

Power In, Relay 1 and Relay 2 connection terminals to provide a

convenient and cost effective way to control a circulator and a boiler

operating control in a single zone hydronic heating system. The ZSR101

single zone switching relay saves hours in installation time and provides

a clean and professional installation.

01284/14 NA

Summary of content (2 pages)

PAGE 1
Z-one™ Relay single zone switching relay CALEFFI ZSR101 01284/14 NA Function The ZSR101 single zone switching relay is operated by low voltage thermostats. The ZSR101 single zone switching relay incorporates Power In, Relay 1 and Relay 2 connection terminals to provide a convenient and cost effective way to control a circulator and a boiler operating control in a single zone hydronic heating system.
PAGE 2
Operating principles (illustrative example) When a zone has a demand from a thermostat (T T or R W) the relay will close sending 120 VAC to Relay 1 NO terminal switching ON the pump, Relay 2 closes C to NO dry contact, signaling the boiler of a heating demand. Refer to Z-one™ Relay Wiring Guide for more system wiring diagrams. R, W, C and T, T, COM dual labeling at thermostat terminals. Compatible with low 3, or 4 wire thermostats R voltage W 2, C or any other low voltage devices T COM action.