11
4.2.1 Service Clearances
There are four methods of installing the SP415/SP421 internally and two for the SP430/SP435.
Only SP415 & SP421 may be used with a Brivis Lay Down Kit. Method 1 and method 2 are the only installation
options available for SP430 & SP435. Method 1 through to Method 4 are available for SP415 & SP421.
Method 1
(In Ceiling & Under Floor), refer to page 3
Method 2
(In Ceiling & Under Floor), refer to page 3
Method 3
(Lay Down - In Ceiling), refer to page 3
Method 4
(Lay Down - Under Floor), refer to page 3
4.2.2 Splitting the Heater
The SP4 model can be split for ease of installation. To split the heater, follow these simple instructions.
• Remove the heater’s roof after removing the 4 roof screws.
• Disconnect the gas valve, overheat/pressure switch loom, ignitor and flame sensor from the control board.
• Disconnect the flue pipe.
• Remove the screws fastening the fan cabinet tabs to the heat exchanger cabinet. These are located at the
top of the heat exchanger cabinet on the heater’s split line.
• Pivot the fan cabinet upwards high enough to dislodge the lower locking tabs fixed to the fan cabinet near the base.
• The heater is now split in two.
• Protect the exposed looms and tabs from damage while the heater is split in two.
• Once ready, reassemble in reverse order.
Note:
Ensure when reassembling the heater that everything is put back and connected correctly.
4.2.3 Changing the Return Air and/or Supply Air Pop Orientation
SP415/SP421:
The return air pop and supply air pop can be changed from the end to either the front or rear of
the heater if necessary.
SP430/SP435:
The return air pop can be changed from front to rear only. The supply air pop can be changed
from front to rear or end of heater. Please refer to Diagram 11.
Reversing Side Entry/Exit
• Remove the screws securing the side pop blanking plate and remove the blanking plate.
• Swap to the other side and fasten with the same screws.
Changing to Rear Entry (SP415 & SP421 only)
Note:
If this is done, predominantly when a unit is laid down then the total number of outlets normally permitted for
that installation must be reduced by 2 (refer to the outlet register chart located on page 20).
• Remove the screws securing the end pop blanking plate and remove the blanking plate.
• Swap to the open side and fasten with the same screws.
IMPORTANT NOTE – RETURN AIR CONNECTION AT THE END OF THE UNIT (REAR ENTRY)
On applicable models, connecting the Return Air duct to the end of the unit (rear entry) will result in reduced air
flow – for example, when using a Brivis Lay Down Kit. In this situation:
– The total number of outlets normally permitted for a heating system shall be reduced by 2 (refer to the outlet
register chart located on page 20).
– DO NOT USE this configuration in Add-On Cooling applications, unless you ensure Minimum Recommended
Airflow required for the cooling is maintained.
Changing to Front Exit
• Remove the screws securing the front panel and discard handles.
4.2.4 Internal Flueing Instructions
Refer to sections 2.5.1, 2.5.2 and 2.5.4 on page 5 and 6.
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