When a zone has a demand
from a thermostat (T T / R W )
the control will send 120 VAC to
the corresponding zone pump,
primary pump and the (X X) dry
contact will close to signal the
boiler of a heating demand. AUX
dry contact will also close as a signal to a variable speed self regulated pump or other controls.
ZONE 1 can be used for priority. When the priority dip switch is ON, a demand from T-STAT 1 will
activate PRIORITY PUMP 1 and all other zone pumps will be switched OFF. The Priority has a 1
hour time out and will go back to operating zones 2 - 6. The ZONE 1 (DHW) dry contact will also
close. Depending upon "Status During Priority" jumper, the primary pump will either be ON or OFF.
XX = Dry contact rated up to 120 VAC, 2 Amps, which is typically
connected to T T on boiler control, closes when any zone calls including
priority. ZONE 1 / ES (DHW) = Dry contact, rated up to 120 VAC, 2
Amps, close with any call to ZONE 1, it is typically used to close DHW
contact on boiler controls equipped with these features. AUX = Dry
contact, rated up to 120 VAC, 2 Amps, close when any zone calls and
can be used
as signal to a variable speed self regulated pump or other controls.
The ZSR series of control is programmed by positioning
five dip switches for the following operations.
Master / Slave: allows for unlimited expansion to
additional ZSR or ZVR relays boards.
Priority ON / OFF: When priority switch is ON, upon
demand to TSTAT 1 , ZONE 1 will operate as priority
and all other zones are temporarily switched off (with
1 hour time-out). When priority is OFF, any zones
that were active when ZONE 1 was switched on will
remain on.
Remote Enable ON / OFF: When remote enable mode is ON, the ZSR board will hold off all zones
until it receives an external 24 - 120 VAC signal to the Remote Enable terminals.
Exercise ON / OFF: When exercise mode is ON, each circulator is switched on for 30 seconds
following 72 hours of inactivity.
Post Purge Zone #1 ON / OFF: When post purge is ON, Zone 1 pump continues operating for 2
minutes after the priority zone is switched off.
MASTER
PRIORITY ON
REMOTE ENABLE ON
EXERCISE ON
POST PURGE ZONE#1 ON
SLAVE
OFF
OFF
OFF
OFF
Dip switch settings
ZONE 1
E / S
XX
AUX
Boiler Connections
T-STAT 2
C
R
W
T T COM
T-STAT 3
C
R
W
T T COM
T-STAT 1
C
R
W
T T COM
T-STAT 4
C
R
W
TTCOM
Thermostats
Status During Priority ON / OFF: When status jumper
is placed on the ON pins, the primary pump will
continue to operate during ZONE 1 priority demand.
When jumper is placed on the OFF pins, the primary
pump will be OFF during ZONE 1 priority demand.
PRIMARY
PUMP
L
N
0
/
0
'
'
STATUS
DURING
PRIORITY
Jumper
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