TM049 27L Continuous Flow Service Instructions
REV AL
– Issued April 2019
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All printed copies are deemed “uncontrolled”.
28
EZ-LINK
™
SYSTEM
The EZ-Link
™
system is designed to electronically control two continuous flow gas water
heaters and have them operate as one. One or both water
heaters may be in operation depending upon the hot water
demand. The second water heater will only operate when
the hot water demand exceeds the capacity of the first
water heater.
The EZ-Link
™
system consists of a cable that is connected
between the two units. The cable is connected into terminal
O on each control PCB. Dip switch 4 on the DIP1 set of
switches is to be switched
to the ‘ON’ position in each water
heater in order for EZ-Link system to function correctly.
When a remote temperature controller is not used with an EZ-Link
™
system one of the water
heaters must be nominated as the master. Dip switch 1 on the DIP2 set of switches is to be
switched ‘ON’ in one of the units to make it the master heater. The temperature setting of
the master heater will determine the temperature setting for both heaters.
If a remote/s is to be fitted either the standard or deluxe temperature controller/s can be
used. The unit that has the remote/s fitted will become the master unit.
The EZ-Link
™
will vary the start up sequence of the two water heaters. These two
continuous flow water heaters must be of the same model as the performance of two
different models cannot be guaranteed.
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.
EZ-Link
™
Error Code Display on Remote Control (if fitted)
If a fault is present with one of the water heaters connected via the EZ-Link
™
system, in
addition to displaying the normal error codes, the remote controller will also display a 1 or a
2 to indicate which unit is at fault. 1 indicates the unit to which the remote temperature
controller is connected has the fault, 2 indicates the unit which does not have the remote
controller connected has the fault.
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
