Table Of Contents - Alpha Pro Tec 48NX Design, Installation And Servicing Instructions

Wall mounted, fan assisted, room sealed, gas fired, high efficiency condensing combination boiler

Table of Contents

INDEX

General Recommendations .....................................................................................................................................................................................4

Safety symbols used ..................................................................................................................................................................................................5

Personal protective equipment ...............................................................................................................................................................................5

Unit installation ........................................................................................................................................................................ 6

1.1

Installation warnings .....................................................................................................................................................................................6

1.2

Handling the appliance ................................................................................................................................................................................10

1.3

Data nameplate and indelible nameplate position ....................................................................................................................................10

1.4

Main dimensions ..........................................................................................................................................................................................11

1.5

Minimum installation distances ................................................................................................................................................................11

1.6

Position of the appliances .............................................................................................................................................................................12

1.7

Aeration and Ventilation of the installation rooms ...................................................................................................................................12

1.8

Antifreeze protection ...................................................................................................................................................................................13

1.9

Other Antifreeze functions (Optionals) ....................................................................................................................................................14

1.10 Gas connection .............................................................................................................................................................................................15

1.11 Hydraulic connection ..................................................................................................................................................................................16

1.12 Electrical connection ...................................................................................................................................................................................18

1.13 Commands for heat adjustment (Optional)...............................................................................................................................................21

1.14 Hydraulic settings ........................................................................................................................................................................................26

1.15 Notes and tables in common of wiring diagrams ......................................................................................................................................27

1.16 Hydraulic diagram - one direct zone - one mixed zone - DHW pump ....................................................................................................28

1.17 Wiring diagram - one direct zone - one mixed zone - DHW pump .........................................................................................................29

1.18 Wiring diagram - two direct heating zones - DHW pump - open therm thermostat ............................................................................30

1.19 Wiring diagram with high power remote control .....................................................................................................................................31

1.20 Wiring diagram BUS-Cascade connection ...............................................................................................................................................32

1.21 Alpha flue systems ........................................................................................................................................................................................33

1.22 Equivalent lengths of flue system components..........................................................................................................................................34

1.23 Cap removal for concentric kit installation ................................................................................................................................................35

1.24 Concentric horizontal kit installation ........................................................................................................................................................35

1.25 Concentric vertical kit installation .............................................................................................................................................................37

1.26 Intake stub pipe kit installation for type B configurations .......................................................................................................................38

1.27 Separator kit installation .............................................................................................................................................................................39

1.28 Ducting of flues or technical slots ................................................................................................................................................................41

1.29 Maximum flue length ...................................................................................................................................................................................42

1.30 Flue gas exhaust with cascade appliances ...................................................................................................................................................43

1.31 Water treatment plant filling .......................................................................................................................................................................43

1.32 System filling ................................................................................................................................................................................................ 44

1.33 Filling the condensate drain trap ............................................................................................................................................................... 44

1.34 Operation with system flow sensor ............................................................................................................................................................ 44

1.35 Simple cascade ..............................................................................................................................................................................................45

1.36 Autodetection .............................................................................................................................................................................................. 46

1.37 Anti-humidity ............................................................................................................................................................................................. 46

1.38 Heating zones ................................................................................................................................................................................................47

1.39 Operation with DHW storage tank (optional) ..........................................................................................................................................47

1.40 Venting...........................................................................................................................................................................................................47

1.41 Anti-legionella ..............................................................................................................................................................................................48

1.42 Continuous pump operation in heating mode ..........................................................................................................................................48

1.43 Gas system start-up ......................................................................................................................................................................................48

1.44 Appliance start-up (Ignition) ......................................................................................................................................................................48

1.45 Circulation pump .........................................................................................................................................................................................49

1.46 Kits available on request ...............................................................................................................................................................................51

1.47 Main components .........................................................................................................................................................................................52