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Table Of Contents

AZEL

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

operated by low voltage thermostats or any other low

voltage controllers having an SPST switching action.

The controller provides intermediate switching

to permit up to six zone valves and a boiler operating

control in a multi-zone hydronic heating system.

Intelligent Linking System ( allows unlimited

zone expansion with additional controllers.

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.

i-Link

i-Link)

i-Link

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

Summary of content (3 pages)

PAGE 1
AZEL TECHNOLOGIES SZ-V4/V6 MULTI- ZONE ZONE VALVE CONTROL 0513-3 INSTALLATION AND OPERATING INSTRUCTIONS APPLICATION SPECIFICATIONS The i-Link series multi-zone zone valve controller is operated by low voltage thermostats or any other low voltage controllers having an SPST switching action. The i-Link controller provides intermediate switching to permit up to six zone valves and a boiler operating control in a multi-zone hydronic heating system.
PAGE 2
i-Link ZONE EXPANSION TERMINAL DESCRIPTIONS i-Link zone valve controller can be expanded to unlimited number of zones with additional i-Link zone valve controllers. Simply connect terminals “1 2 3 ” of the “Master” unit to terminals “1 2 3 ” of the “Slave” unit with 18AWG wires. More units can be connected in the similar manner. Use the Master/Slave Switch to define the unit as “Master” or “Slave”.
PAGE 3
TYPICAL WIRING DIAGRAMS THERMOSTAT (eg. Azel D-135EB) TT on Boiler with DHW TT Terminals DHW Boiler T Control T Boiler/ T Burner Control T MASTER JUMPER 3&4 SLAVE 24VAC OUT ZONE EXPANSION SWITCH ZONE 1 C 1 FUSE 2.