Yunca Gas NZS 7421-1990 User manual

Multi FS - Jan_1997 (Revised Apr_2016).doc www.yunca.co.nz Page 1 of 4
INSTALLATION INSTRUCTIONS for
MULTI-FUEL FREESTANDING BURNER
JANUARY 1997 (Revised April 2016)
(Referred to as the “new model” multi in our spare parts guide)
NO LONGER IN PRODUCTION
TESTED TO NZS 7421-1990
A. Yunca recommends that competent trades persons carry out all installations (e.g. NZHHA
registered installer) to obtain maximum performance and safe, efficient heating.
B. A permit is required and we suggest you check with your local building inspectors as by-laws
can vary from area to area. This model is not clean air approved.
Also notify your Insurance Company that a space heater has been installed.
C. Floor Protector
1. Must extend at least 300mm in front of closed door.
2. Must extend at least 150mm on each side of heater.
3. Must be constructed of non combustible materials giving heat resistance equal to
concrete or brick at least 50mm thick.
D. Seismic restraint
Heater must be restrained from seismic movement as required by AS/NZS 2918:2001.
E. Manufacturers recommended minimum clearances from combustible walls.
APPLIED RESEARCH tested to NZS 7421-1990
Clearance (FIG D)
Rear Clearance (with YUNCA flue guard fitted)
200mm
Side Clearance (with YUNCA flue guard fitted)
700mm
Corner Clearance (with YUNCA flue guard fitted)
200mm
Rear Clearance (without YUNCA flue guard fitted)
700mm
Side Clearance (without YUNCA flue guard fitted)
800mm
Corner Clearance (without YUNCA flue guard fitted)
200mm
Minimum Hearth clearance (from door aperture)
300mm
F. YUNCA Flue Kit (complies to AS/NZS 2918:2001, Appendix F): FIG A, B, E
1. 4.2m x 150mm stainless steel flue. 4. 1 x insulation boundary shield.
2. 2.4m x 250mm galvanised liner. 5. 2 x spider brackets.
3. 1 x ceiling tile. 6. 1 x weather cap & cowl.
Please Note: All joints must be sealed with flue sealing compound. Use stainless steel
screws or rivets to join the flue pipe (three equally spaced places at each joint). The first
length of flue pipe must be screwed to flue spigot. The required minimum flue termination
height is 4.6 m above the floor protector.
G. Flue Mounted Shield (Flue Guard) Kit: FIG A
1. 1 x 1200mm length back guard plus a 900mm adjustable extension.
2. 1 x 1200mm length perforated front guard
A division of Terry Young Ltd, New Zealand

Multi FS - Jan_1997 (Revised Apr_2016).doc www.yunca.co.nz Page 2 of 4
CEILING PLATE
25mm min. BETWEEN LINER & ANY TIMBER
ENLARGEMENT OF CEILING ASSEMBLY
300
300mm Sq. TIMBER FRAME
TIMBER RAILS
SUPPORT ANGLES
LINER POSITIONED BY SPIDER
BRACKETS. TOP/BOTTOM
INSULATION BOUNDARY SHIELD
CUT CEILING MATERIAL
BACK 25mm CLEAR
OF BOUNDARY SHEILD.
CEILING
25
300
FIG A: TYPICAL FLUE INSTALLATION
FIG B
1200mm
Front
Guard
65mm
Gap
600mm ABOVE RIDGE LINE (MIN)
CONDITIONS FOR FLUES
1. The FLUE shall extend to:
Not less than 600mm above the highest
point on the roof if within 3.0m of that point,
or
Not less than 1000mm above the
intersection point with the roof and not lower
than any point of the roof within 3.0m.
In any case the length of the flue shall not be
less than 4.6m from the ash floor protector.
In some situations the Local Council may
vary the above requirements.
2. The flue system must be tested and comply
with AS/NZS2918:2001, Appendix F.
3. The insulation boundary shield shall be
capable of preventing accidental migration of
loose-fill or any combustible material by any
action of wind or by persons moving in the
ceiling space.

Multi FS - Jan_1997 (Revised Apr_2016).doc www.yunca.co.nz Page 3 of 4
FIG C: DIMENSIONS
FIG D: HEATER POSITIONS
Fig D drawings continued on Page 4.

Multi FS - Jan_1997 (Revised Apr_2016).doc www.yunca.co.nz Page 4 of 4
More than 30003000
or less
600 min.
3000
1000 min. if clear
within 3000 of
flue top
.
3000
Any nearby
structure
.
1000 min. if clear
within 3000 of
flue top
MINIMUM HEIGHT OF FLUE SYSTEM EXIT
NOTE : Dimensions are in millimetres
3000
or less
600 min.
More than 3000
3000
.
Increase from
1000 min. until
clear within
3000 of flue top
IMPORTANT INFORMATION
A. The appliance and flue system shall be installed
in compliance with AS/NZS 2918:2001 and the
appropriate requirements of the relevant building
code or codes.
B. Appliances installed in accordance with this
standard shall comply with the requirements of
AS/NZS 4013 where required by the regulatory
authority i.e. the appliance shall be identifiable by
a compliance plate with the marking “TESTED
TO AS/NZS 4013”
C. Any modification of the appliance that has not
been approved in writing by the testing authority
is considered to be in breach of the approval
granted for compliance with AS/NZS 4013
D. Mixing of appliance or flue system components
from different sources or modifying the
dimensional specification of components may
result in hazardous conditions. Where such
action is considered, the manufacturer should be
consulted in the first instance.
E. Cracked and broken components e.g. glass
panels or fire bricks, may render the installation
unsafe.
F. Secure the heater base to the hearth or sub-
framing with Dynabolts or similar. Seismic
restraint brackets are available from Yunca
Heating.
FIG D: Continued.
IMPORTANT
IF A WATERBOOSTER IS FITTED:
A. Do not connect to an unvented hot water
system
B. Install in accordance with AS 3500.4.1 or
NZS 4603 and the appropriate
requirements of the relevant building
codes.
Follow local Council’s Specifications – the Yunca Multi is NOT clean-air approved.
FIG E: FLUE SYSTEMS REQUIREMENTS