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FS BOX INSTALLATION
INSTRUCTIONS
Table 21 – FS Box Compatibility with 208/230V
Rooftop Units
Rooftop
40QQ- 036ABA3-
40QQ- 048ABA3-
Model
0A0
0A0
Number
FX Box Part
RBM- Y0383FUL
RBM- Y0613FUL
Number
Table 22 – FS Box Compatibility with 460V Rooftop
Units
Rooftop
40QQ- 036ABAC-
40QQ- 048ABAC-
Model
0A0
0A0
Number
FX Box Part
RBM- Y0383FUL
RBM- Y0613FUL
Number
1. Remove the three panels necessary as shown in Figs.
47 and 48.
Fig. 47 - 40QQ Rooftop Unit
Fig. 48 - 40QQ Rooftop Unit with Panels Removed
2. Hang the FS box from the top cover bracket using the
threaded rods. The threaded rods are shown in Fig.
49. Nuts and washers are included in the installation
packet bag, which is found in the control box of the
unit. Fig. 49 shows the mounted FS box.
40QQ- 060ABA3-
0A0
RBM- Y0613FUL
40QQ- 060ABAC-
0A0
3. If required, braze the appropriate adapter fittings onto
RBM- Y0613FUL
4. Knock out the three holes shown in Fig. 51 on the
35
Fig. 49 - FS Unit Mounted to Threaded Rods
both sides of the FS box as shown in Fig. 50. The
adapter fittings are included with the FS box.
Reference the FS box installation manual for sizing.
Then braze the liquid and suctions lines on the
rooftop unit onto the FS box adapter fittings while
purging with nitrogen.
Fig. 50 - Braze Adapter Fittings
square panel of the rooftop unit. Braze in the three
field installed line sets running from the FS box to the
outdoor unit. Be sure to put the three field- installed
line sets through the three holes in the square panel
prior to brazing.
Fig. 51 - Knockouts and Line Sets
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