A
ZEL
TECHNOLOGIES
SZ-V4/V6
MULTI- ZONE ZONE VALVE CONTROL
INSTALLATION AND OPERATING INSTRUCTIONS
FEATURES
.
Front panel indicator lights
.
Field selectable Priority
.
Priority timer for protection of a priority zone malfunction
and prevention of freeze-ups in the heating zones
.
Unlimited zone expansion
.
Isolated End Switch and Priority End Switch
.
Three-minute End Switch delay timer for two wire type
zone valve applications. Circulator will start only after
the zone valve is fully opened.
.
DIP switch for easy setup of two wire type zone valve
applications. No need to hook up wire jumper on the
third and fourth terminals on each zone
.
Works with two, three or four wire type zone valves and
thermostats
.
Compact and modern design
.
Fuse protection
.
Simplified wiring
.
Contractor friendly PCB layout
.
Easy-Connect Screwless Terminals
.
24VAC transformer output with common terminal
provides compatibility with electronic thermostats
.
Universal thermostat compatibility
.
Pre-wired terminals for circulator
.
SPDT Priority zone 1 relay switch (N/O Com N/C).
Capable of prioritizing DHW pump in a 2-pump system
.
50VA replaceable transformer
.
100% Factory Tested
.
RoHS compliance & Environmental Friendly - Do Not
Contain hazardous substances (heavy metals such as
lead, mercury, cadmium etc).
.
Extended three year warranty
APPLICATION
The
series multi-zone zone valve controller is
i
-Link
operated by low voltage thermostats or any other low
voltage controllers having an SPST switching action.
The
controller provides intermediate switching
i
-Link
to permit up to six zone valves and a boiler operating
control in a multi-zone hydronic heating system.
Intelligent Linking System (
allows unlimited
i
-Link)
zone expansion with additional
controllers.
i
-Link
Field selectable priority with protection timer prevents
freeze-ups in the event of a priority zone failure. The
three-minute delay timer let the two wire type zone
valve fully open before turning on the circulator.
The panel provides EZ screwless terminal blocks for
connections to the thermostats and zone valves. LED
indicators on the front panel provides functional status
and easy troubleshooting.
SPECIFICATIONS
Model:
SZ-V4 4 Zone Valve Control
SZ-V6 6 Zone Valve Control
Power Supply:
120VAC, 50/60Hz
Transformer:
50VA
Dimensions:
11.25”(W) x 6.5”(H) x 3”(D)
Electrical Switch Rating:
10 A 1/3 HP @ 120VAC
Thermostat Anticipator Setting: 0.18 A
Shipping Weight:
4.5 lbs.
CAUTION!
1. Improper installation and operation of this control could result
damage to the equipment and possibly even personal injury. All
wiring must comply with national and local electrical codes,
ordinances, and regulations. Use Copper wires only. 120 VAC
wiring must have a minimum temperature rating of 75 C. 12-22
gauge wire is recommended for thermostat and 24 VAC source
connections. 12-18 gauge wire is recommended for 120 VAC
connections.
Never connect the load terminals to a load that takes more
current than the amount listed for the relay in the electrical
ratings.
2. To prevent electrical shock hazard, disconnect power supply
before installing.
3. Azel Technologies is not liable for an special, incidental, indirect
or consequential damages resulting from the use of its products.
4. This literature is provided for informational purposes only.
OPERATION
When any zone (thermostat) calls for heat, the corresponding
yellow light turns on and zone valve is energized. When zone valve
is fully opened, the red light turns on and End Switches (X-X) is
closed (to start boiler) while 120VAC power is supplied to start the
circulator through “CIRC” terminals. When zone 1 calls for heat, two
additional End Switches (Zone 1/NC COM NO and X1-X1) are also
energized.
DOMESTIC HOT WATER PRIORITY
OPERATION
When zone 1 priority switch is set to
ON
, zone 1(domestic hot water
zone) has priority control over zone 2 to 6(heating zones). If zone 1
is calling for heat, zone valves 2 to 6 are disabled until zone 1
domestic hot water demand is satisfied.
When zone 1 priority switch is set to
OFF
(factory setting)
,
all zones
operate independently of each other.
When zone 1 priority switch is set to
TIMER
(Priority Protection
Timer mode), if the priority zone calls for domestic hot water for
more than one hour(eg. In case of a priority zone failure such as a
faulty indirect water heater controller keeps calling for heat or
leaking situation), all the heating zones (2 to 6) are released from
locking out and they are returned to normal operation. This features
helps prevent freeze-ups in the event of zone 1 failure. Once the
priority zone 1 is satisfied, the priority timer is reset to allow priority
for another one hour.
Note: It is important to set the slide switch before turning on the
power.
0513-3
