User Guide

•
Insert flat head screwdriver
into open tab.
•
Repeat on opposite side.
Cover removal
•
Pull cover straight off.
1 Zone
ZSR101
C
R
W
T T COM
L
POWER IN
N
C
RELAY #1
NO
NC
C
RELAY #2
NO
NC
TRANSFORMER
PWR
ZONE
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.
Operating principles
Supply 120 VAC hot to termilan L and 120 VAC neutral to N.
A factory installed jumper from L terminal to the C terminal of
Relay 1 is supplied for simplified pump connection.
1 Zone
ZSR101
C
R
W
T T COM
L
POWER IN
N
C
RELAY #1
NO
NC
C
RELAY #2
NO
NC
TRANSFORMER
PWR
ZONE
1 Zone
ZSR101
C
R
W
T T COM
L
POWER IN
N
C
RELAY #1
NO
NC
C
RELAY #2
NO
NC
TRANSFORMER
PWR
ZONE
R, W, C and T T Comm dual
labeling at thermostat terminals.
Compatible with low voltage 2,
3, or 4 wire thermostats or any
other low voltage devices having
a switching action.