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Packaged rooftop units
with integrated gas burner
2
Contents
1. Introduction
.......................................................................................................................................................................................................3
2. Operation
limits
.................................................................................................................................................................................................3
3. Technical characteristics ...................................................................................................................................................................................4
4. General
recommendations
................................................................................................................................................................................5
Delivery of the unit ............................................................................................................................................................................................5
Unit identifi cation ...............................................................................................................................................................................................5
Documentation provided ...................................................................................................................................................................................5
Location .............................................................................................................................................................................................................5
Installation .........................................................................................................................................................................................................5
Unit maintenance ..............................................................................................................................................................................................5
Safety advice .....................................................................................................................................................................................................5
Refrigerant safety ..............................................................................................................................................................................................6
Burner safety .....................................................................................................................................................................................................6
5. Transport
...........................................................................................................................................................................................................6
Gravity centre ....................................................................................................................................................................................................7
6. Location and assembling ..................................................................................................................................................................................7
Location designation .........................................................................................................................................................................................7
Sound Level ......................................................................................................................................................................................................7
Anchorage for antivibrators ...............................................................................................................................................................................8
Minimum free space for commissioning and maintenance operations .............................................................................................................8
7. Gas
Burner
........................................................................................................................................................................................................9
Operating principle ............................................................................................................................................................................................9
Control of the gas burner ................................................................................................................................................................................10
8. Safety
elements
..............................................................................................................................................................................................11
Safety devices in the gas burner .....................................................................................................................................................................11
Safety devices in the 48EN/EH unit ................................................................................................................................................................12
9. Checking before commissioning .....................................................................................................................................................................13
Electrical Connections .....................................................................................................................................................................................13
Gas Burner ......................................................................................................................................................................................................13
Air ducts connections ......................................................................................................................................................................................15
Checks in the axial fans ...................................................................................................................................................................................15
Checks in the centrifugal fans .........................................................................................................................................................................15
Condensate drain connection .........................................................................................................................................................................16
10. Starting the unit ...............................................................................................................................................................................................17
Checks prior to commissioning .......................................................................................................................................................................17
Operational checks .........................................................................................................................................................................................17
Possible problems at commissioning ..............................................................................................................................................................17
11. Options ............................................................................................................................................................................................................18
Pre-assembly frames (optional) ......................................................................................................................................................................18
Outdoor coil protection grille ...........................................................................................................................................................................18
Filters ..............................................................................................................................................................................................................18
Stop-drop ........................................................................................................................................................................................................18
12. Maintenance ....................................................................................................................................................................................................19
13. Control and analysis of breakdowns................................................................................................................................................................22
Summary of Contents for 48EH
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