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2.4
EXTERNAL INSTALLATION
2.4.1 Supply Air Overheat Switch Position (KUN530 & KUN330 ONLY)
For external installations of the KUN530 (refer to Diagram 5) and KUN330 (refer to Diagram 6) heaters the supply
air overheat switch position must be changed from end discharge to side discharge modify as follows:
2.4.1.1 KUN530
1.
Disconnect the quick connect terminals (Orange / White) for the overheat switch loom connected from the
end discharge overheat switch behind the burners.
2.
Reconnect the quick connect terminals (Orange / White) to the side discharge overheat switch. These
terminals can be identified by the label "SIDE DISCHARGE O/H SWITCH".
KUN530
Flue Terminal
Connection
2.4.1.2 KUN330
1.
Disconnect the quick connect terminals (Orange / White) for the overheat switch loom connected to the end
discharge overheat switch behind the burners.
2.
The KUN330 is fitted with both left and right side discharge O/H Switches, reconnect the quick connect
terminals (Orange / White) to the O/H Switch on the same side the air is supplied from. These terminals can
be identified by labels on the sheet metal plate above the burner "LEFT SIDE DISCHARGE O/H SWITCH"
or "RIGHT SIDE DISCHARGE O/H SWITCH".
KUN330
Flue Terminal
Connection
2.4.2 Modifying KUN Model Duct Orientation
The duct orientation of KUN series heaters can be reversed if the installation requires it. For more information refer
to "2.3.3 Return & Supply Air POP Rotation Procedure" on page 13.
End Discharge O/H Switch
quick connect terminals
(factory default connection)
O/H Switch Loom
Side Discharge O/H Switch
quick connect terminals
Diagram 5
Left Side Discharge O/H
Switch quick connect terminals
O/H Switch Loom
End Discharge O/H Switch
quick connect terminals (factory
default connection)
Right Side Discharge O/H
Switch quick connect terminals
Diagram 6
2
1
2
2
1
15
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