CALEFFI Z-one ZVR103 User Manual

39
Sequence of Operation / Settings
• Master / Slave switch: Master
• Pump Exercise: OFF
• Priority: OFF
• AUX During Priority Demand: OFF
• Sec Pump Status During Zone 1 Demand
Jumper: 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 output. The control
will close the XX contacts to signal the boiler
of a demand.
• If a demand occurs from the DHW aquastat
(T-STAT 1), the “T-STAT CALL” LED and the
“VALVEOPEN”LEDwill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.) ZVR control
sends 120 VAC to the ZONE #1 PUMP. The
XX and ZONE 1 E/S contacts close to signal a
DHW demand to the boiler.
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
• NOTE: At this point, the control has signaled
the boiler of a DHW demand which (in most
cases) will override any outdoor reset controls
and raise the temperature of the boiler.
Because priority is not enabled on the control,
you will now be allowing high temperature fluid
to zones 2-6. Be certain that these zones are
capable of handling this high temperature
fluid. If not, priority will need to be enabled to
hold off zones 2-6 during a demand from the
DHW aquastat.
• When the thermostat demands from zones 2-6
are 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 the DHW aquastat (T-STAT 1) is still calling
for heat the XX and ZONE 1 E/S contacts will
remain closed and the ZONE #1 PUMP will
remain powered. 120 VAC will be dropped to
the SYSTEM PUMP. (This is due to the jumper
position of the SYSTEM PUMP for STATUS
DURING ZONE #1 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XXand
ZONE 1 E/S contacts will open terminating
any demands to the boiler. The 120 VAC is
dropped to all of the pump outputs (SYSTEM
PUMP and ZONE #1 PUMP).

CALEFFI Z-one ZVR103 Specifications

General

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