INSTALLING A WATER HEATING BOOSTER
Water heating booster tubes can be fitted to woodfires sold in New Zealand. Fitting a water booster
tube converts an /S model into a /W type. If a tube is retro-fitted, in some cases the air metering plate
must be changed to ensure that emission requirements are still met. Only the models listed in the table
below may be installed in the ‘clean air’ zones, and in some cases other components will be required
in addition to the water tube. (See the table below). The air metering plate is fitted directly behind the
sliding plate that controls the stove heat output, and it can be reached by removing the air control
knob (remove the screw underneath), and lifting off the air grille.
Water booster tube holes are provided and plugged in the back wall of the free-standing firebox and
the side walls of the Fireplace Insert model. All plumbing work must meet the requirements of NZS
4603 unless local building regulations dictate otherwise. Pipe connections are 1” BSP and the pipe
positions are illustrated below. Special piping methods must be followed to ensure effective
circulation, and the hot water cylinder will need to have an internal riser pipe to two thirds of the
cylinder height to discourage unwanted water circulation when the woodfire is not burning. This
internal riser pipe must be connected to the return pipe from the woodfire.
THE SYSTEM MUST BE VENTED. See the warning on page 2.
For effective circulation, the pipes from the woodfire should rise at the rate of one in five toward the
storage cylinder, and ideally the cylinder should be within three metres of the woodfire. Detailed
piping instructions are included in the conversion kit, but two safety requirements deserve special
emphasis.
THERE MUST BE NO NON-RETURN OR SHUT-OFF VALVES IN THE PIPES BETWEEN
THE WOODFIRE AND THE STORAGE CYLINDER.
A WOODFIRE FITTED WITH A WATER HEATING BOOSTER MUST NOT BE FIRED
UNLESS IT IS CONNECTED TO A VENTED STORAGE CYLINDER FILLED WITH WATER
FREE TO CIRCULATE.
PART NUMBERS OF COMPONENTS REQUIRED FOR WATER BOOSTER
CONVERSIONS IN CHRISTCHURCH AND CANTERBURY CLEAN AIR ZONES
MODEL
CONVERSION
KIT No.
WATER
TUBE No.
METERING
PLATE No.
SECONDARY AIR
TUBE No.
LE 3000 / 5000 Series 2 994019 586044 986178 994010
LE 3000 PROVINCIAL Series 2 995095 586593 995024 No Change
Panorama Series 2 994020 586044 No Change No Change
Verona 995371 586044 No Change No Change
Inlet
Return
630 Toronto
590 Grandview, LE 7000
520 Panorama, Verona
495 LE 3/5000
475 Siena
450 LE 2000 / Horizon
20
340
170
300
50
55
334
Return
Inlet
Water Pipe Connection Positions
Free-standing Models
Viewed from Rear
In-built Models
10
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