Specifications

TM040 16, 18 & 20L Continuous Flow Gas Water Heater Service Instructions
D.O.I: 2/06/2009
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18
EZ-Link™ System
The EZ-Link system is used to electronically control two
identical water heaters, plumbed in parallel, from the same
temperature controller in order for them to operate as one.
Depending upon the hot water demand, one or both units
may be in operation.
The EZ-Link system consists of a cable that is connected
between the PCB‟s.
The cable is connected into connector E on each
PCB and dip switch 4 is turned to the „on‟
position in each water heater (refer to diagram
opposite).
If it becomes necessary to test the operation of
both units, increase the hot water flow by
opening multiple hot water outlets simultaneously
until both units operate.
The diagram opposite details a typical
installation utilising the EZ-Link
system.
1 2 3 4
1 2 3 4
DIP1
ON
OFF
ON
1 2 3 4
1 2 3 4
ON
OFF ON
DIP1
SW1 SW2
REMOTE
CONTROLLER
TERMINAL
Dip Switch 4
in the on (up) position
Ez-Link
Cable
Secure
cable
with cable
clamp &
screw
Controller Cable
(one water heater only)
Ez-Link Cable Connection
E
E
350
eaves, balconies
& other projections
300
MIN
no minimum
distance
requirement
to return wall &
openings into building
300 MIN
COLD WATER SUPPLY
GAS SUPPLY
COLD WATER
SUPPLY
HOT WATER
TO OUTLETS
TEMPERED
WATER
TO
OUTLETS
NOTE:
PRESSURE
LIMITING DEVICE
(PLV)
REQUIRED TO
TLD IF PLV
INSTALLED AT
WATER HEATER
NOTE: NON RETURN
VALVES (NRV)
REQUIRED ON COLD AND
HOT SUPPLY LINES TO A
TEMPERATURE LIMITING
DEVICE (TLD) IF NOT
INCORPORATED IN TLD.
LEGEND
ISOLATION VALVE (FULL FLOW)
PRESSURE LIMITING VALVE
NON RETURN VALVE
TEMPERING
VALVE
TEMPERATURE LIMITING DEVICE
IF REQUIRED
SUITABLE FOR MAXIMUM FLOW.
PIPE SIZES:
Manifold DN25
Branches DN20
Weatherproof
GPO x 2
Temperature
Controller
(installed indoors)
water
volume
on
off
check
hot water
temperature
before use
K
x10
°C
in use
priority
Controller
Cable
Ez-Link
Cable
MANIFOLD INSTALLATION - EZ LINK CONNECTION
TWO CONTINUOUS FLOW WATER HEATERS