Nortek PREEVA NEOS, Installation And Servicing Manual

Contents

General Information (G)

PREEVA Neos range  .........................................4
Using this manual .............................................4
Warranty ..........................................................4
Important notice to installers  ............................5
Health and safety  .............................................6
Uncrating / preparation .....................................7

Technical Data (TD)

Technical data ...................................................8

Dimensions .......................................................9

Installation (I) 

Clearance distances ..........................................11
Indoor model location .......................................11
Outdoor model location ....................................12
Minimum temperature requirements .................13
Ductwork connections ......................................14
Combustion air supply / flue arrangement .........14
Type B appliances ..............................................16
Type C appliances .............................................17
Condensate drain .............................................18
Gas connection .................................................18
Electrical supply and connections ......................20
Thermostat controls ..........................................20

Wiring connections ...........................................21

Commissioning and Operation (C)

Pre-start checks .................................................22
Start up ............................................................22
Air / gas ratio controls .......................................23
Gas valve adjustment ........................................23
Gas conversion .................................................24
Commissioning checks  .....................................24
Commissioning - handover ...............................25

Operation .........................................................27

Maintenance and Servicing (MS)

Model 25-70 component layout ........................29
Model 100 component layout ...........................30
Maintenance schedule ......................................31
Heat exchanger maintenance  ...........................31
Replacement of gas valve ..................................31
Venturi cleaning and replacement .....................32
Combustion fan cleaning and replacement .......32
Burner cleaning and replacement  .....................33
Burner chamber / tube insulation check and 
replacement ......................................................34
Cleaning and replacement of burner probes .....36
Replacement of LC1 and LC3 safety thermostats
.........................................................................37
Replacement of ignition controller ....................38
Replacement of ignition transformer .................38
Replacement of lockout circuit board ................38
Replacement of fan relay ..................................38
Replacement of air circulation fan .....................38
Flue and combustion air ....................................38
Flue condensate drainage trap ..........................38
Fan motor and fan maintenance .......................38

Unit operation ..................................................39

Fault Finding (FF)

Fault finding .....................................................40

Spare Parts (SP)

Spare parts. ......................................................42
Optional air filters .............................................43

ErP Table (ErP)

ErP table - internal units - G20 ..........................44
ErP table - internal units - G25 ..........................45
ErP table - internal units - G25.3 .......................46
ErP table - external units - G20..........................47
ErP table - external units - G25..........................48
ErP table - external units - G25.3.......................49