EZ-LINK SYSTEM DUAL INSTALLATION
59
DUAL INSTALLATION
Install two continuous flow water heaters of the same model in an Equa-Flow
®
manifold plumbing
arrangement. The two continuous flow water heaters can be installed side by side with minimal clearance
between them. The AGA has approved the installation of two Rheem 874 and 876 series 018 and 020 model
water heaters with an exemption from the 300 mm minimum clearance requirements between flue terminals,
as stated in AS 5601, clause 5.13.6.5.
The cold water and hot water manifolds must be designed to balance the flow from each water heater. To
achieve this, there are basic installation requirements and principles which must be followed:
1.
The hot water line from the manifold must leave from the opposite end to which the cold water line
enters the manifold.
2.
The pipe work must be sized to meet the requirements of both AS/NZS 3500.4 and the application. It is
recommended to use DN25 pipe for the cold water line, cold and hot headers and hot water line and
DN20 for the cold and hot water branch lines of each water heater.
3.
A full flow gate valve or ball valve must be installed on the cold water line to the system. A non return
valve or stop tap must not be installed.
4.
A full flow gate valve or ball valve (not a stop tap) must be installed on both the cold water branch and
hot water branch of each water heater.
5.
An isolation valve must be installed on the gas branch of each water heater.
6.
Non return valves or pressure limiting valves must not be installed on the branch lines to the water
heaters.
7.
All fittings, valves and branch lines must be matched sets to each of the water heaters.
8.
Sufficient space must be left to enable access, servicing or removal of either water heater.
Refer to the
„Typical Two Unit Manifold with Ez-Link Connection‟
diagram on page 61 for installation and
plant layout details.
LABELS
A warning label (121109) and an AGA approval label (121901) are
supplied in the Ez-Link kit. Where the two water heaters are installed close
together and the warning label and AGA approval label on the inside face
of the right hand water heater cannot be read, it is necessary to adhere the
two labels supplied to the right-hand face of the water heater.
1.
Place the warning label below the rating label.
2.
Place the AGA approval label beside the barcode label.
Refer to the
„Label Positioning‟
diagram on page 59 for the position of the
two labels to be adhered to the water heater.
A second rating label is attached to the inside of the front cover. This can
be referenced to determine details of the left hand water heater.
TEMPERATURE CONTROLLER
A temperature controller is required to be installed with the EZ-Link system. The controller can be either a
standard or Deluxe controller. If a temperature controller is not installed, neither water heater will operate.
Connect a temperature controller to one only of the two water heaters. Up to three temperature controllers of
the same family can be installed to this water heater. Refer to
“Installation – Controllers”
on page 62.
The water heater connected with the temperature controller(s) will become the “master” unit or “first” water
heater. The installed temperature controller(s) will control the temperature and functionality of both water
heaters.
DO NOT
OPERATE THIS APPLIANCE BEFORE
READING THE INSTRUCTION
BOOKLET.
DO NOT
PLACE ARTICLES ON OR AGAINST
THIS APPLIANCE.
DO NOT
STORE CHEMICALS OR FLAMMABLE
MATERIALS, OR SPRAY AEROSOLS
NEAR THIS APPLIANCE.
DO NOT
OPERATE WITH PANELS, COVERS
OR GUARDS REMOVED FROM THIS
APPLIANCE.
DO NOT
ENCLOSE THIS APPLANCE.
CERTIFIED FOR OUTDOOR INSTALLATION ONLY
To operate the water heater
Open the inlet water and gas valves fully
Plug appliance into mains power outlet and switch on
Turn on remote temperature controller(s) if fitted
Open a hot tap - the heater will operate automatically
To shut down the water heater
Close the inlet water and gas valves fully
Turn off remote temperature controller(s) if fitted
If power will be disconnected, refer to the owners guide
regarding draining the appliance to avoid damage due to
freezing
121109 AD
N199
AS 3498
WMKA21434
Label Positioning
Содержание 18
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