Bosch Highflow 17e User manual

1
Installation/Operating Instructions
Invented for life
MODELS
Bosch 17e
Bosch 21e
Bosch 25e
Bosch 26e
(YS1770RA series, YS2170RA series, YS2670RABZ, YS2670RA series)
INSTALLATION MANUAL
This appliance must be installed in accordance with the manufacturer’s installation instructions, AS5601,
AS/NZS3500.4, AS3000 wiring regulations and all Local Building, Water and Gas fitting regulations.
To be installed and serviced only by an authorised person
This appliance is not suitable for use as a pool heater
The “authorised installing person” is responsible for :
1. Correct commissioning of this appliance.
2. Ensure unit performs to the specifications stated on the rating label.
3. Demonstrate operation of unit to customer before leaving.
4. Hand these instructions to customer.
Failure to install this appliance in accordance with these installation instructions may void warranty
SAR8512-7
Rev. 10/11
*SAR8512C*

2
Page Number
INTRODUCTION 3
DIMENSIONS 4
TECHNICAL DATA 5
APPLIANCE LOCATION 6
COMPONENT DETAILS 7
GAS CONNECTION 9
COLD WATER CONNECTION 9
HOT WATER CONNECTION 10
ELECTRICAL CONNECTION 10
PRE-SET TEMPERATURE 10
TEMPERATURE SELECTOR PAD INSTALLATION 11
TEMPERATURE SELECTOR PAD WIRING 11
TEMPERATURE CONTROL OPERATION 12
COMMISSIONING AND TESTING 12
TEMPERATURE SETTING 13
USER SAFETY INSTRUCTIONS 15
IN CASE OF DIFFICULTIES 15
Manufacturer’s Warranty 17
INDEX
Installation/Operating Instructions
Invented for life

3
This Bosch water heater is an external, electronically controlled gas water heater.
This Bosch appliance is supplied set to operate without temperature selector pads
at a constant 55°C outlet temperature. To set the appliance to a different
temperature, refer to page 13 for details.
Available as optional extras are Main, Bathroom or Sub temperature selector pads.
Only one Main controller and one Bathroom controller can be
connected to the appliance along with up to 2 x Sub-controllers.
The bathroom and sub temperature selector pads have a maximum temperature
setting of 50°C for safety. To ensure compliance with Australian Standard AS/NZS
3500.4, in the bathroom area, this may be achieved by using a Bosch appliance
limited to 50°C or using a Bosch appliance with a delivery temperature greater than
50°C and installed with a tempering valve (high performance). In New Zealand,
please refer to the New Zealand Building Code and all other applicable electrical,
gas fitting and plumbing codes.
Before installing this appliance, carefully check that all packing materials have been
removed and that the appliance is correct for the gas supply to which it is to be
connected
Installation/Operating Instructions
Invented for life

4
DIMENSIONS YS1770RA series, YS2170RA series
Installation/Operating Instructions
Invented for life
510〜512
48
44
520
487
542
10
10
120
60
84 133
97
40
37
109
40
57
31
1085
120
10
50
11170
178
255
308〜320
49
338
350
334
2542
L
Powercableintakinghole
Powercableintakinghole
(PSflameinstallationpich)
（Perspectivedrawingfromupperofappliance）
(PSflameinstallationpich)
Bottomofcase
Outlet-waterconnectionR3/4
Inlet-waterconnectionR3/4
GasconnectionR3/4
7-φ7.2hole
Installationholeofwall
(Installedwiththreeholes)
7-φ7.2hole
Installationholeofwall
(Installedwithtwoholes)
Gasconnection
Inlet-waterconnection
Waterdrainvalve(Waterfilter)
Outlet-waterconnection
PressurerelifevalveandWaterdrainvalve
Earthconnectionscrew
Bottomofcase
Air-inlet
Flueterminal
DIMENSIONS YS2670RA series, YS2670RABZ
590〜592
567
622
600
120
60
84
44
48
10
10 133
49
318〜320
268
10
50
120
40
97
40
109
85
178
37 338
47
10 11170
31
350
334
253
42 25
Powercableintakinghole
Powercableintakinghole
(PSflameinstallationpich)
(PSflameinstallationpich)
（Perspectivedrawingfromupperofappliance）
Air-inlet
(Installedwithtwoholes)
7-φ7.2hole
Installationholeofwall
PressurerelifevalveandWaterdrainvalve
Earthconnectionscrew
Inlet-waterconnection
Waterdrainvalve(Waterfilter)
Outlet-waterconnection
Bottomofcase
Gasconnection
Bottomofcase
7-φ7.2hole
Installationholeofwall
(Installedwiththreeholes)
Outlet-waterconnectionR3/4
Inlet-waterconnectionR3/4
Flueterminal
GasconnectionR3/4
YS1770RA series 178
L
YS2170RA series 214

5
Installation/Operating Instructions
Invented for life
TECHNICAL DATA
Nominal hourly gas consumption by proportional gas control:
17e
21e
26e
135 Mj/hr
170 Mj/hr
200 Mj/hr
135 Mj/hr
170 Mj/hr
200 Mj/hr
Natural Gas LP Gas
Test Point Pressure:
Maximum Inlet Water Pressure 1000 kPa
Input voltage single phase 50Hz AC240/230 Volt
Maximum output current 1 Amp
AGA Approval certificate number 7032
Inlet gas connection male thread 20mm
Cold water connection male thread 20mm
Hot water connection male thread 20mm
Relief valve pressure setting 1600 kPa
DATA PLATE
Fitted inside of cabinet
GAS TYPE
The gas type is nominated on a temporary label located on the front cover, and on the data
plate located inside of cabinet. The gas type is the gas on which this appliance is designed to
operate.
DO NOT OPERATE WITH ANY OTHER GAS TYPE.
WARNING LABELS
Located on the right side of the cabinet- PLEASE READ THESE LABELS CAREFULLY!
YS1770RA series
YS2170RA series
YS2670RA series
.67
.69
.72
.26
.21
.19
Natural Gas
Max (kPa)
Model Natural Gas
Min (kPa)
.78
.91
.80
LP Gas
Max (kPa)
.23
.23
.22
LP Gas
Min (kPa)
Water heating capacity
Litres a minute raised 25°C
17e
17
21e
21
26e
26
25e 200 Mj/hr 200 Mj/hr
YS2670RABZ .72 .19 .80 .22
25e
26

6
Use as a guide only. Refer to AS5601 or local gas fitting rules for specific locations
T=Flue terminal
I=Mechanical air inlet
M=Gas meter
W=Window
Shaded area indicates
prohibited area
P=Electricity meter
or fuse box
f
c
n
k
k
j
jj
hhe
T
e
h
T
g
P
W
d
b
d
T
g
c
a
M
door
I

Ref Item Minimum Clearance
mm
Natural
draft
Fan
assisted
aBelow eaves,balconiesand other projections
Appliancesup to 50MJ/hinput 300 200
Appliancesover 50 MJ/h input 500 300
bFrom the ground, above a balcony or other surface 300 300
cFroma return wall or externalcorner 500 300
dFroma gasmeter 1000 1000
eFrom an electricity meter or fuse box (P) 500 500
fFroma drain pipe or soil pipe 150 75
gHorizontally from any building structure or obstruction facing a flue
terminal
500 500
hFrom any other flue terminal, cowl, or combustion air intake 500 300
jHorizontallyfrom an opening window, door, non-mechanicalair inlet. Or other opening
into a building with the exception of sub floor ventilation
Appliancesup to 150 MJ/h 500 300
Appliancesover 150MJ/hinput up to 200 MJ/h input 1500 300
Appliances over 250 MJ/h input 1500 1500
All fan assistedflue appliancesin the direction of discharge 1500
Appliances over 200 MJ/h input up to 250 MJ/h input 1500 500
kFrom a mechanicalair inlet, including spablower 1500 1000
nVerticallybelow an openablewindow, non-mechanicalair inlet, or any other opening into a
building with the exception of sub-floor ventilation:
Spaceheatersup to 50 MJ/h 150 150
Other appliancesup to 50 MJ/h 500 500
Appliancesover 50 MJ/h and up to 150 MJ/h input 1000 1000
Appliancesover 150 MJ/h input 1500 1500
POSITION FOR INSTALLATION
The heater must be installed by using a fixing method sufficient to hold the 21Kg weight
of unit (see the technical sheet for dimensions of mounting brackets and positions)
N.B.: On combustible surfaces e.g. weatherboards etc. it is not required to install a fire
proof back board.
APPLIANCE LOCATION
(1) This water heater is approved for outdoor installation only.
(2) Do not install this water heater with any modification or alteration.
(3) Do not install this water heater indoors or in an enclosed space .
WARNING: FLUE OUTLET MUST BE FREE FROM ANY COMBUSTIBLE MATERIAL.
CLEARANCES FOR FLUE TERMINAL (front of heater)
The location of the flue terminal must comply with the clearances shown on this page. If
you are unsure about clearances not indicated here, in general refer to AS5601, or your
local authority. In Western Australia refer to the SECWA rules and regulations.
Installation/Operating Instructions
Invented for life

7
Installation/Operating Instructions
Invented for life
COMPONENT DETAILS
Earth leakage breaker
Flue terminal
Antifrost heater
High-limit switch
Empty heating prevention device
Thermal fuse
Over-heat prevention device
Burner manifold
Remote Control Connections
Hot-water temperature change connector
Ignition plug
Flame rod
Flame failure safety device
Gas solenoid valve set
Printed circuit board
Water flow rate adjusting valve
Gas connection
Outlet water connection
Power cable
Inlet water connection
•YS1770RA series, YS2170RA series

8
Installation/Operating Instructions
Invented for life
Hot-water temperature change connector
Printed circuit board
Gas solenoid valve set
Ignition plug
Remote Control Connections
Burner manifold
Thermal fuse
Flue terminal
Antifrost heater
High-limit switch
Earth leakage breaker
Water flow rate adjusting valve
Flame rod
Inlet water connection
Power cable
Outlet water connection
Gas connection
Controller
Remote
Empty heating prevention device
Over-heat prevention device
Flame failure safety device
•YS2670RA series, YS2670RABZ

9
Installation/Operating Instructions
Invented for life
GAS CONNECTION
(1) Fit a union to the water heater gas inlet for easy connection and removal. The
thread diameter is 20 mm.
THIS DOES NOT INDICATE THE SIZE OF THE GAS SUPPLY.
(2) Fit an AGA / NZGA approved isolating gas cock in the supply line adjacent to
the water heater gas connection.
(3) Ensure that the supply pipe and the gas pressure regulator (LPG or Natural
Gas) has sufficient flow capacity for this and other appliances connected to the
fitting line.
(4) For LPG appliances ensure that gas cylinders are of sufficient size. The water
heater alone will require 2 x 45 Kg capacity cylinders.
(5) Before connecting the appliance to the gas service, purge any debris or air
from the gas service.
(6) Check all joints for leaks with an approved leak tester after connection.
Ensure that the gas pipe size is correct. If undersized the appliance will not
operate correctly
SERVICE CALLS ARE CHARGEABLE FOR UNITS WITH INCORRECT PIPE
SIZES OR BLOCKED GAS OR WATER FILTERS.
COLD WATER CONNECTION TO WATER HEATER
Refer to technical sheet for position of connections. The WATER INLET connection is
20 mm 3/4" BSP and requires a union to allow for removal of the water heater. Pipe
sizing from the cold water supply should be sized according to local BY LAWS for
water supply.
If sludge or foreign matter is present in the water supply it is recommended that a
separate filter/strainer be fitted to the cold water supply line.
Please ensure this appliance does not receive inlet water greater than 85°C
when used as a Solar booster.
ISOLATING GATE VALVE
A GATE VALVE OR BALL VALVE must be used on the cold water inlet to the water
heater. THIS REQUIREMENT IS AN AUSTRALIA WIDE REQUIREMENT UNDER
THE NATIONAL PLUMBING CODE.
STOP TAPS OR COMBINATION STOP TAPS AND NON-RETURN VALVES ARE
NOT TO BE USED.
N.B. NO PRESSURE REDUCTION VALVE IS REQUIRED UNLESS THE WATER
PRESSURE EXCEEDS 1000 kPa
Refer to AS 5601 Installation Code or NZ installation code for pipe sizing details.

10
HOT WATER CONNECTION TO WATER HEATER.
Refer to Technical Sheet for position of connection. The outlet connection is 20 mm (3/4"
BSP) MALE thread, and requires an isolating union to allow for removal of the unit.
Keep the pipe lengths to a minimum, and make sure that the pipework is well insulated as
correct performance of the appliance is dependent on properly insulated pipework.
DO NOT FIT ANY VALVES OR RESTRICTORS TO THE OUTLET OF THE WATER
HEATER.
DO NOT FIT ANY OBSTRUCTION TO THE PRESSURE RELIEF LOCATED ON THE HOT
WATER OUTLET CONNECTION.
After purging the air from the system using the hot water supply taps, remove the water
inlet strainer located on the cold water supply inlet connection. Remove any debris from
the filter and replace. When replacing the filter, do not over-tighten the “O” ring seal.
In order to comply with AS3498 the minimum distances as per the diagram below must be
observed.
These requirements are only for the 50°C locked units.
WARNING: For continued safety of this appliance it must be installed, operated and
maintained in accordance with the manufacture's instructions.
ELECTRICAL CONNECTION
The appliance is equipped with a 1.7 metre cable with a three pinned earthed plug
to be connected to a 240V, 50Hz supply. The electrical rating of the appliance is
0.4 Amps
The appliance requires a 240V in Australia and 230V in New Zealand, 50Hz
weatherproof plug installed in a protected position adjacent to the appliance.
IMPORTANT: The appliance should always be disconnected from the power
supply before any maintenance is carried out. If the power cord is damaged and
requires replacement, use only an original spare part available from the manufacturer.
Installation/Operating Instructions
Invented for life
COLD
1/2" / 15mm 1.0m (min)
Closest hot water outlet