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page 7

Wetbacks

If the home is in a classified “clean air zone”, and dependent
on requirements/restrictions which may be imposed by your
local council, you may or may not be able to install a water
heating device. If in doubt consult your local Metro retailer.
Only Pioneer’s cast jacket wetback system should be fitted to
a Metro; alternative wetbacks will void the Metro’s emission
approvals and may seriously affect the performance of the
appliance and void the owner’s warranty.

Note; Wetback systems are not suitable for use in locations where the
water supply has lime content, lime build up inside the coil will eventually
block the coil causing the wetback to fail.

The wetback is fitted to the inside rear of the firebox, with
the connection pipe heights illustrated and detailed on the
previous page 6. Please note:
• Wetback connections for the Tiny models are 92mm left of

the flue centre. The Wee Rad is 226mm and Xtreme Rad
is 275mm left of the flue centre. All other Metro models are
140mm left of the flue centre, facing the Metro/wall; the
return pipe connection is directly above the inlet connection.

• The Wee Rad, Xtreme Rad & Xtreme Rad Base wetback

position is to the outside left hand side wall. See specific
instruction in the ‘Rad Wetback’ box for these appliances.

• Reduced height pedestals are available for certain models

to reduce wetback connection heights.

• It is recommended the return pipe has a minimum rise of

1 in 12; performance will reduce as the distance to the
storage cylinder increases.

To fit the wetback proceed as follows: (Unless Wee or Xtreme
Rad models, then please follow instructions in the wetback box)

1. Remove the rear panel of the Metro by removing the

four pozi drive screws. Remove the two pre-punched
knockouts from this panel.

2. Two further knockouts will be visible on the inner rear

heatshield; remove these also. Once these are removed
6mm nuts will be visible through the knockout holes.

3. Open the Metro’s door and locate two bolts securing the

pressed washers which are visible on the left hand side of
the firebox for both inlet and outlet connection points.

4. A further three bolt heads will also be visible on the inside

rear wall of the firebox; these are threaded into the 6mm
thick firebox. Remove all three.

5. Using the tube of sealant supplied with the wetback, apply

a liberal bead of sealant around both the two connection
pipes and also the outer circumference of the wetback
which will face the inside rear wall of the firebox. This will
completely seal the wetback to the inside rear wall of the
fire on installation.

6. Fit the wetback into the firebox and carefully pass the

connection pipes through the holes in the rear of the
firebox. Securely attach the wetback using the three bolts
previously removed from the rear face of the firebox, fitting
them through the slots provided in the wetback’s jacket.

7. The wetback is now ready for connection to the storage

cylinder by a registered plumber.

Wetbacks

WaRNINg!

Important Information

• Do not connect to an unvented hot water system.
• Install in accordance with AS 3500.4.1 or

NZS 4603 and the appropriate requirements of

the relevant building code or codes.

It is recommended that all Metro
freestanding wood fires be installed with
the energy efficient Metro ECO flue system
which comes complete with a detailed
installation manual. This installation manual
must be presented with your application
to gain consent with your local council.

A copy of the installation manual
can be downloaded from
www.metrofires.co.nz, under Flue
Systems, or a copy can be obtained from
your Metro retailer. Any alternative flue system must comply
with and be installed as detailed in AS/NZS 2918:2001, and
a copy of the installation manual must also be presented with
your application to gain consent with your local council.

All Metro’s require a 150mm diameter flue. Please note:

• All joints in the flue pipe must be sealed with Pioneer fire

cement (or similar) and riveted.

• The base of the flue pipe must be sealed into the outlet of

the Metro’s flue stub. This is critical for optimum operation.

• Refer “Important Information” on page 2.

• The flue systems 150mm diameter flue pipe must

terminate a minimum of 4.6 metres above the top surface
of the floor protector.

Pioneer Flueshield

All Metro’s have been tested with a Pioneer double flue
mounted shield. For the Metro to be installed with minimal
clearances as the clearance chart states, only the Pioneer
double mounted flue shield can be used. All other flue shields
will invalidate the installation.

The Metro can be installed without a flue shield, if this is the
case it needs to be installed as AS/NZS 2918:2001 stipulates.

Flue installation

ECO Flue System

Installation Manual

ECO Flue Systems

Freestanding Flue Syst

ems

ECO Flue System Installat

ion Options

............ 2

ECO Base Flue System

& ECO Option Kits