Supply Air Orientation; Sp4 Heater Cabinet: Swap H1/H2 - H3; Supply Air Switch Position - Sp623U/630U/521U; Sp5 And Sp6 Heater Cabinet: Swap Any Combination Of H1, H2 Or H3 - Rinnai Brivis StarPro SP623UN Installation Manual

RETURN AIR CONNECTION AT THE END OF THE UNIT (F3)
IMPORTANT:
Connecting the return air duct to the end of the unit reduces the rated airflow by up to 30%.
For ADD-ON cooling applications, MAKE SURE that the minimum recommended airflow is maintained. Refer to the
ADD-ON installation manual for more information.

Supply Air Orientation

4.2.6 SP4 Heater Cabinet: Swap H1/H2 – H3
a. Remove the lid (Diagram 10).
b. Remove the H3 handle, and then remove the panel.
c. Remove H1 or H2 panel as required.
d. Remove the internal blanking panel (four screws behind insulation).
e. Install the blanking panel in the required position.
f. Install the external panels in the required positions.
g. Install the lid.

4.2.7 SP5 and SP6 Heater Cabinet: Swap Any Combination of H1, H2 or H3

a. Remove the lid (Diagram 10).
b. Remove H3 panel.
Diagram 11. Overheat Switch
c. Remove H1 or H2 panels.
d. Remove the H1 or H2 internal panels (four screws each, behind insulation)
e. Install the internal panels in the required positions.
f. Install the external panels. (Install the end panel and handle last).
g. Install the lid.
Note: Ensure the overheat switch loom is not tangled, tight or pinched.
Supply Air Switch Position – SP623U/630U/521U

4.2.8 Supply Air Switch Position

All SP units leave the factory configured for an internal installation with the supply air pop at the heaters end, refer
to diagram 12A. When models detailed in Table 5 are reconfigured to an external installation the supply air overheat
switch assembly must remain secured to the internal supply air pop panel. The supply air overheat loom for external
installations must be rerouted and path is dependent on the nominated supply air side of heater, refer to diagrams
12B and 12C to identify the requirements. All other models within this manual not detailed in Table 5 have a fixed
supply air overheat switch position for internal and external configurations.
Rinnai
Overheat
Switch
18 Ducted Gas Heater IM