Introduction; Appliance Description; Appliance Designation - Bosch GWI-N Series Training And Service Information

1. Introduction

This manual is a complement to the instruction/operation manual delivered with the appliance, with the main
important technical details that are relevant for the official service partners and trainers in the country. In any
case one of the documents replaces the use of the other.

2. Appliance description

This appliance is a fan pressurized gas water heater, which will replace the actual room sealed range of
appliances offering a wider range of modulation and installation advantages with both indoor and outdoor
models available.
2.1

Appliance Designation

The designation allows the identification of the main characteristics of the units, especially when report is needed
through call centre or after sales technicians.
GWH – Instantaneous gas water heater
GWH 12 / 16 / 20 – Output (flow rate at 25ºC rise)
GWH 12 / 16 / 20 CT – Thermostatic control (variable power through electronic control)
GWH 12 / 16 / 20 CTD – Display
GWH 12 / 16 / 20 CTD E – Electronic ignition (source is electricity)
GWH 12 / 16 / 20 CTD E 23/31 – Gas type (23 = natural gas / 31 = liquefied petroleum gas)
GWH 12 / 16 / 20 CTD E 23 /31 F3 O – Flue less model with fan pressurized operation (outdoor unit)
GWH 12 / 16 / 20 CTD E 23 /31 F5 – Room sealed fan pressurized operation (indoor unit)
Indoor Installation
(temperature setting adjustable degree by degree)
Indoor Installation
(temperature setting locked = L)
Outdoor Installation
(temperature setting adjustable degree by degree)
Outdoor Installation
(temperature setting locked = OL)
Table 1 – Appliance identification of low output range (Compact 4000 S)
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Segment
6 720 814 719 SM FP_Australia 2017/04 EN
Designation
GWH 12 CTD E 23 F5
GWH 12 CTD E 31 F5
GWH 16 CTD E 23 F5
GWH 16 CTD E 31 F5
GWH 20 CTD E 23 F5
GWH 20 CTD E 31 F5
GWH 12 CTD E 23 F5 L
GWH 12 CTD E 31 F5 L
GWH 16 CTD E 23 F5 L
GWH 16 CTD E 31 F5 L
GWH 20 CTD E 23 F5 L
GWH 20 CTD E 31 F5 L
GWH 12 CTD E 23 F3 O
GWH 12 CTD E 31 F3 O
GWH 12 CTD E 23 F3 OL
GWH 12 CTD E 31 F3 OL