CALEFFI Z-one ZVR103 User Manual

33
Sequence of Operation / Settings
• Master / Slave switch: Master
• Pump Exercise: OFF
• Priority: ON
• AUX During Priority Demand: OFF
• System Pump Status During Zone 1 Demand
Jumper:
OFF
• Sec Pump Status During Zone 1 Demand
Jumper:
OFF
• A demand occurs from a thermostat on zones
2-6closingRtoW.The“T-STATCALL”LED
illuminates for the corresponding zone.
• ZVR control sends 24 VAC to the corresponding
zone MOTOR terminals to open the zone
valve.
• When the zone valve end switch closes,
the “VALVE OPEN” LED illuminates for the
corresponding zone. ZVR control sends
120 VAC to SYSTEM PUMP and SEC PUMP
outputs. The control will close the X X contacts
to signal the boiler of a demand.
• When the thermostat demand is satisfied R
to W will open and the “T-STAT CALL” and
“VALVEOPEN”LEDswillturnoff.24VACis
dropped to the corresponding zone MOTOR
terminals.
• If no other zones are calling for heat the X X
contacts will open terminating the demand for
heat to the boiler. The 120 VAC is dropped to
the SYSTEM PUMP and SEC PUMP.
• If a demand occurs from the DHW aquastat
(T-STAT1),the“T-STATCALL”andthe“VALVE
OPEN” LEDs illuminate for zone 1.  (When
using a pump for zone 1 instead of a zone
valve a jumper must be installed on the ZONE
1 END SWITCH terminals.)
• If any other zone was calling for heat (zones
2-6) when zone 1 is calling 24 VAC is dropped
to those zone’s MOTOR terminals. The
“T-STAT CALL” and “VALVE OPEN” LED will
also turn off.
• The XX and the ZONE 1 E/S contacts close to
signal a DHW demand to the boiler.
• The ZONE 1 PUMP output delivers 120 VAC.
• 120 VAC is dropped to the SYSTEM PUMP
and SEC PUMP.
• Once the DHW aquastat (T-STAT 1) is satisfied
it will open R to W and 120 VAC to ZONE 1
PUMP is dropped. The ZONE 1 E/S and X X
contacts open.
• If a call for heat exists from zones 2-6 the
corresponding “T-STAT CALL” will illuminate
again and 24 VAC will be delivered to their
zone MOTOR terminals.
• When the zone valve end switch closes,
the “VALVE OPEN” LED illuminates for the
corresponding zone. ZVR control sends
120 VAC to SYSTEM PUMP and SEC PUMP
outputs. The control will close the X X contacts
to signal the boiler of a demand.
• When all the thermostat demands are satisfied
RtoWwillopenandthe“T-STATCALL”and
“VALVE OPEN” LEDs will turn off.  The X X
contacts will open terminating the demand for
heat to the boiler. The 120 VAC is dropped to
the SYSTEM PUMP and SEC PUMP.
DHW Time Out \ Freeze Prevention Feature
• After one hour of a priority demand, the
control will open the ZONE 1 E/S contacts and
drop power to ZONE #1 PUMP and ZONE 1
MOTOR terminals.
• If a call for heat exists from zones 2-6, the
control will satisfy those demands before
going back to the priority demand.
• After zones 2-6 have been satisfied, the
control will go back to the priority demand and
reset the one hour timer.
Description of terminals
= Ground
N = Neutral (Common leg of 120 VAC)
L = Line (Hot leg of 120 VAC)
Thermostat terminals
R = 24 VAC
W = Heat call
C = Common of 24 VAC
Boiler terminals
XX = Dry contact rated up to 120 VAC, 2 Amps,
which is typically connected to TT on boiler control,
closes when any zone calls including priority.
ZONE 1 E/S = Dry contact rated up to 120 VAC,
2 Amps, will close with any call to ZONE 1. Zone
1 can be enabled as a priority zone, typically used
for heating domestic hot water. The ZONE 1 E/S
can be used to close a 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.
Pump terminals
SYSTEM PUMP = Runs when any zone calls for
heat.
SEC PUMP = Runs when any zone calls for heat.
ZONE 1 PUMP = Runs when zone 1 thermostat
calls for heat and zone 1 end switch has closed.
A jumper is required between the ZONE 1 END
SWITCH terminals when using a pump for ZONE
1 instead of a zone valve.
STATUS DURING ZONE 1 DEMAND ON / OFF:
When status jumper is placed on ON pins, the
secondary and / or system pump will continue to
operate during Zone 1 demand. When jumper is
placed on OFF pins, the corresponding pump will
be OFF during Zone 1 demand.
Valve terminals
Motor = 24 VAC to power the zone valve motor
End Switch = Connects to end switch on zone
valve. Must be jumped if using a 2–wire zone valve.
WARNING: NEVER CONNECT R & C DIRECTLY,
this will be a direct short on the 24 VAC supply

CALEFFI Z-one ZVR103 Specifications

General

Brand	CALEFFI
Model	Z-one ZVR103
Category	Control Unit
Language	English