Dometic FreshJet FJX Installation Manual page 22

EN Dometic FJX
10. Take out the roof hatch or roof air conditioner.
11. Remove the sealant around the opening using a scraper or similar tool.
Fig.  on page 3
Laying the connecting cables
12. Check that the voltage specification on the roof air conditioner data plate is the same as that of the power sup-
ply. The roof air conditioner must be connected to an electric circuit which is able to supply the required current
(Technical data).
13. Ensure that the power supply has a residual current circuit breaker (< 30 mA). If missing, install the residual cur-
rent circuit breaker.
14. Install an all-pole switch with a contact opening width of at least 3 mm on the installation side.
15. Select the cross-section of the power supply cable corresponding to the length:
• Length < 7.5 m: 1.5 mm²
• Length > 7.5 m: 2.5 mm²
16. Make an opening on one side in order to feed through the power supply cable.
Fig.  on page 3
17. Feed the power supply cable through the opening into the vehicle interior.
Installing the roof top unit
18. Seal around the under side of the roof frame with flexible non-hardening butyl sealing compound (e.g. SikaLas-
tomer-710, Selleys Butyl Mastic, Bostik ezycaulk butyl sealant, or similar products). Observe the sealant manu-
facturer's instructions.
Fig.  on page 4
19. Orientate the roof frame based on opening size.
20. Fit the roof frame into the roof opening.
Fig.  on page 4
21. Li the roof top unit onto the roof of the vehicle. Observe the direction of travel.
22. Position the roof top unit into the roof frame and align into the roof frame's groove. To align into the roof frame's
groove use the corners at the front of the roof frame.
Electrical connection
23. Connect the power supply cable.
Fig.  on page 5
a) Connect the cables (1) to a cable connector (2).
b) Connect the roof air conditioner with the power supply.
c) Connect the grounding cable to the vehicle's grounding system.
24. Only mechanical models: Connect the cable between the external unit and the air box diffuser.
a) Pull out the filter slightly to create a gap for the communication cable (3).
b) Feed the cable through the gap and locate the wire in the opening.
c) Connect the communication 6-pin plug into the socket on the side of the display in the ADB. Ensure that the
cable is located into the small opening away from the filter area.
d) Secure excess cable into the holders.
25. Only fixed-speed and inverter models: Connect the communication cable.
a) Pull out the filter slightly to create a gap for the communication cable (4).
b) Feed the communication cable through the gap and locate the wire in the opening.
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