Azel i-Link SZ-V4, i-Link SZ-V6 Installation And Operating Instructions Manual

AZEL

TECHNOLOGIES

SZ-V4/V6

MULTI- ZONE ZONE VALVE CONTROL

INSTALLATION AND OPERATING INSTRUCTIONS

0513-3

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.

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

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.

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”. The priority zone of the “Master” unit (if zone 1 priority switch is
set to ON or Timer) will turn off all other zones of the “Slave” units.
After expansion, all the units will act as a single unit. This means only
one set of X-X(End Switch) terminal is needed to connect to the “TT”
on the boiler control. Also, only one circulator connection is needed.
Factory default setting “Master”.

Note: It is important to set the slide switch before turning on the power.

L.E.D. SYSTEM STATUS INDICATION LIGHTS

YELLOW light (T1-T6) indicates that the thermostat is calling for
heat and the corresponding zone valve is energized.

RED light (Z1-Z6) indicates zone valve (with an end switch) is fully
opened and End Switch (X-X) is closed. In case of two wire type
zone valve, the zone valve is energized. If the 3-minute XX delay
timer is set to OFF, End Switch is closed. If the XX delay timer is set
to ON, End Switch is closed three minutes after thermostat calls for
heat.

GREEN Power light indicates presence of power supply.

GREEN solid Priority Timer light indicates that the one-hour timer is
started. GREEN flashing light indicates one hour priority timer is
expired and all heating zones are released from locking out. All
zones can operate independently.

Dry Contact Terminals

X X /End Switch Dry Contact End Switch
X1 X1/Zone 1 Zone 1 Dry Contact End Switch
NO COM NC/Zone 1 Zone 1 Dry Contact End Switch

Line Voltage Terminals

N 120 VAC Neutral Terminal Input
L 120 VAC Hot Terminal Input
L N/CIRC 120VAC Circulator Power

Low Voltage Terminals

24VAC OUT/R 24 VAC transformer hot output
24VAC OUT/C 24 VAC transformer common output
ZONE EXPANSION/1 2 3 ZONE expansion to additional

i-Link zone valve controls

THERMOSTATS

R/T1 Zone 1 24VAC Thermostat Hot Terminal
W/T1 Zone 1 Thermostat Switching Terminal
R/T2 Zone 2 24VAC Thermostat Hot Terminal
W/T2 Zone 2 Thermostat Switching Terminal
R/T3 Zone 3 24VAC Thermostat Hot Terminal
W/T3 Zone 3 Thermostat Switching Terminal
R/T4 Zone 4 24VAC Thermostat Hot Terminal
W/T4 Zone 4 Thermostat Switching Terminal
R/T5 Zone 5 24VAC Thermostat Hot Terminal
W/T5 Zone 5 Thermostat Switching Terminal
R/T6 Zone 6 24VAC Thermostat Hot Terminal
W/T6 Zone 6 Thermostat Switching Terminal

ZONE VALVES (ZONE 1 - 6)

1 2 Terminals for zone valve motor connections
3 4 Terminals for zone valve end switch connections

TROUBLE SHOOTING

TWO WIRE TYPE ZONE VALVE

When two wire type zone valve is used, JUMPER 3&4 DIP switch
can be set to ON for each corresponding zone so that there is no
need to put a wire jumper across terminal R-R. Also, XX (End
Switch) Delay Timer can be set to ON. This allows a delay of
three minutes on closing the X-X End Switches after thermostat
calls for heat which gives sufficient time for zone valve to fully
open.

ELECTRONIC THERMOSTATS

ALL i-Link controls are compatible with 2, 3 or 4 wire type
thermostats. 24VAC Out can be used to supply power to the
thermostat. For thermostats requiring the 24VAC Common, simply
connect C terminal from the thermostat to C terminal on the 24VAC
output.

Azel D-135E thermostat is recommended for use with i-Link
Controls.

NOTE ON WIRING INSTRUCTIONS

SZ-V6 units are used as examples on the wiring diagrams. SZ-V4
units can be wired in the same manner.
If Azel D-135E digital thermostat is used, it can be powered by
connecting terminal 4 & 5 of D-135E to 24VAC Out (R & C) of i-Link
controls. For simplicity, this connection is not shown in all example.

When 120VAC is supplied to i-Link controllers, the green
power light should be on.

! If the thermostat is closed and yellow zone light is on, the

power should be supplied to the zone valve. If the zone
valve is not actuated or if the zone valve end switch is not
closed (red light is not turning on), check the zone valve
for functionality.

! If yellow zone (1-6) light is on all the time, check the

thermostat for functionality. Remove the thermostat from
the i-Link controller and put a piece of wire across R/T
and W/T terminal to simulate the thermostat calling for
heat. If everything works properly, then the thermostat is
faulty.

! If the green power light is off, check the fuse and the

presence of 120VAC power supply. If the fuse is fine and
there is no power output on R C terminals of 24VAC
OUTPUTS, the transformer(model: 5011F) needs to be
replaced.