39
FS BOX I NSTALLATION
INSTRUCTIONS
Table 22 – FS Box Compatibility with 208/230V
Rooftop Units
Rooftop
Model
Number
40QQ- 036 AAA3 -
0A0
40QQ- 048 AAA3 -
0A0
40QQ- 060 AAA3 -
0A0
FX Box Part
Number
RBM- Y0383FUL RBM- Y0613FUL RBM- Y0613FUL
Table 23 – FS Box Compatibility with 460V Rooftop
Units
Rooftop
Model
Number
40QQ- 036 AAAC -
0A0
40QQ- 048 AAAC -
0A0
40QQ- 060 AAAC -
0A0
FX Box Part
Number
RBM- Y0383FUL RBM- Y0613FUL RBM- Y0613FUL
1. Remove the three panels necessary as shown in Figs.
52 and 53.
Fig. 52 - 40QQ Rooftop Unit
Fig. 53 - 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.
54. Nuts and washers are included in the installation
packe t bag, which is found in the control box of the
unit. Fig. 54 shows the mounted FS box.
Fig. 54 - FS Unit M ounted to Threaded Rods
3. If required, braze the appropriate adapter fittings onto
both sides of the FS box as shown in Fig. 55. The
adapter fittings are included with the FS box.
Refere nce the FS box installation manua l for sizing.
Then braze the liquid and suctions lines on the
rooftop unit onto the FS box adapter fittings while
purging with nitrogen.
Fig. 55 - Braze Adapter Fittings
4. Knock out t he three holes shown in Fig. 56 on the
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 t he three field- installed
line sets through the three holes in the square panel
prior to brazing.
Fig. 56 - Knockouts and Line Sets
40QQ
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