Thermann 16NG50 User manual

INSTALLATION
INSTRUCTIONS
GAS CONTINUOUS FLOW
WATER HEATERS
FOR MODELS
16NG50/16LP50, 16NG60/16LP60, 20NG50/20LP50,
20NG60/20LP60, 26NG50/26LP50, 26NG60/26LP60

2 INSTALLATION INSTRUCTIONS

3INSTALLATION INSTRUCTIONS
IMPORTANT SAFETY INSTRUCTIONS
DO NOT INSTALL INDOORS
The unit is for outdoor installation only. Never install indoors.
It will be extremely dangerous because it will cause oxygen
deficiency and incomplete combustion.
WATCH FOR GAS LEAK
When gas leak is noticed, stop using the unit immediately
and close the gas valve.
CONFIRM TYPE OF GAS AND POWER SUPPLY
Make sure to use the gas type as well as power supply
(voltage/frequency) as indicated on the label located on
the cabinet side.
Natural Gas or LPG will be printed on the gas type label.
FREEZE PREVENTION
This unit comes equipped with electric heaters that prevent the water heater from freezing.
To enable this freeze prevention system to operate there must be an electrical power supply
connected to the unit.
The freeze prevention devices will not operate if the electrical power source is not connected.
The electric defrost heaters are installed inside the water heater only. All external hot and
cold water supply pipes and fittings connected to the water heater should be properly
insulated to prevent freezing.
SECURE SERVICE SPACE
Make sure there is enough space around the unit
for checking, service and maintenance.
Close
Close
Close
5
Danger
Warning
Caution
No Fire Prohibited

4 INSTALLATION INSTRUCTIONS
DANGER OF WET HANDS
Do not touch power plug with wet hands. It can cause
electric shock.
INSERT POWER PLUG FULLY
INTO POWERPOINT
Check that the power plug is clean and undamaged,
then fully insert into the power point.
DO NOT PULL POWER CORD
Do not remove the power plug by pulling the cord.
Hold the plug when removing the power cord.
It may generate heat by wire breakage then cause fire.
DO NOT USE POWER CORD BUNDLED
Never use power cord in a bundled condition.
It may cause heat generation and fire.
DO NOT REPLACE POWER CORD
If the power supply cord is damaged, it should be replaced by
a cord available from REECE agents. The power cord must be
replaced by an authorised person to prevent accidents.
ELECTRICAL CONNECTION
5
5
5
5
Prohibited
Prohibited
Warning
Check
WARNING:
For continued safety of this appliance it must be installed, operated and
maintained in accordance with the manufacturer's instructions.

5INSTALLATION INSTRUCTIONS
This product is an external electronic gas hot water heater.
These units are factory set to deliver 50°C or 60°C depending on the model purchased.
If the unit has a factory setting temperature higher than 50°C and is intended to deliver water
directly to sanitary fixtures used primarily for the purposes of personal hygiene, it must be fitted
with an approved tempering valve into the hot water piping to any bathroom and/or ensuite.
For use as a solar booster, the setting temperature of the Thermann26 must be altered to 70°C
(Refer to wiring diagram attached on the unit).
For this application, it is suitable to connect to a Thermann solar evacuated tube manifold
assembly. In that case, these instructions must be read in conjunction with the Thermann solar
hot water system technical (installation) manual.
Three optional remote controls can be provided for complete hot water temperature selection.
If this option is used an approved temperature limiting device must be installed on any units
with a delivery temperature above 50°C.
THIS HOT WATER UNIT IS NOT FOR POOL OR SPA HEATING
GENERAL
The Thermann Continuous Flow must be installed in accordance with the following:
(1) These instructions;
(2) National Construction Code and Local authority regulations;
(3) AS/NZS 3500.4 “National Plumbing and Drainage Code, Part 4 Hot Water Supply Systems”,
(4) The Australian standard for gas installations AS 5601;
(5) Any other statutory regulation that may apply;
(6) A notice of intention to install shall be lodged with the relevant local
Gas Authority prior to installation.
DELIVERY INSPECTION
The Thermann Gas Continuous Flow hot water heater unit is supplied fully assembled and ready
for installation.
The installer, upon delivery of the unit, should immediately remove all packing materials and
inspect the unit for damage, and ensure that the unit supplied is correct for the gas supply
to which it is to be connected. If any concerns, please report any damage or discrepancies to
Reece, quoting the serial number and model number, which can be found on the outside of
the cabinet.
INSTALLATION MUST BE CARRIED OUT ONLY BY AN AUTHORISED AND
APPROPRIATELY LICENSED PERSON.
INTRODUCTION

6 INSTALLATION INSTRUCTIONS
EXPLODED DIAGRAM OF UNIT
Model : 16/20
PARTS DESCRIPTION
1. FLUE OUTLET
2. GAS VALVE
3. CIRCUIT BOARD
4. BURNER CASE
5. HOT WATER OUTLET
6. COLD WATER INLET
7. GAS SUPPLY INLET
8. HEAT EXCHANGER
Model : 26
PARTS DESCRIPTION
1. FLUE OUTLET
2. GAS VALVE
3. CIRCUIT BOARD
4. BURNER CASE
5. HOT WATER OUTLET
6. COLD WATER INLET
7. GAS SUPPLY INLET
8. HEAT EXCHANGER
9. WATER VOLUME
PROPORTIONAL VALVE
1
3
4
8
2
765
1
3
4
8
9
2
765

7INSTALLATION INSTRUCTIONS
DIMENSIONS CONNECTIONS
Model : 16/20
Model : 26
8.8
8
165 15
619
13575
350
50 50
585
330
COLD WATER INLET R1/2 /15
WATER INLET FILTER
PRESSURE RELIEF VALVE
GAS SUPPLY INLET
R3/4 /20

HOT WATER OUTLET
R1/2 /15
CABLE ENTRY POINT
8425
31
12
330
R3/4 /20
R3/4 /20

R3/4 /20
623
13575
350
50 50
8425
35
8
165 15
585
HOT WATER OUTLET
CABLE ENTRY POINT
COLD WATER INLET
WATER INLET FILTER
PRESSURE RELIEF VALVE
GAS SUPPLY INLET
8.8
8
165 15
619
13575
350
50 50
585
330
COLD WATER INLET R1/2 /15
WATER INLET FILTER
PRESSURE RELIEF VALVE
GAS SUPPLY INLET
R3/4 /20

HOT WATER OUTLET
R1/2 /15
CABLE ENTRY POINT
8425
31
12
330
R3/4 /20
R3/4 /20

R3/4 /20
623
13575
350
50 50
8425
35
8
165 15
585
HOT WATER OUTLET
CABLE ENTRY POINT
COLD WATER INLET
WATER INLET FILTER
PRESSURE RELIEF VALVE
GAS SUPPLY INLET

8 INSTALLATION INSTRUCTIONS
TECHNICAL DATA
MODEL 16 20 26
Nominal hourly gas consumption
by proportional electronic gas control MJ/h 125 160 200
Test point pressure (NG) kPa 0.4 0.56 0.68
Test point pressure (LPG) kPa 0.4 0.61 0.7
Water heating capacity raised 40°C L/min 10 12.5 16.25
Minimum working pressure kPa 260 260 210
Maximum working pressure kPa 1200
Gas injectors diameter (NG) mm 1.35/1.65 1.35/1.65 1.34/1.65
Gas injectors diameter (LPG) mm 1.35/1.65 1.35/1.65 1.0/1.2
Input voltage single phase 50Hz V 240
Maximum output current A 0.42 0.45 0.47
Inlet gas connection male thread R3/4" (20mm)
Cold water connection male thread R1/2" (15mm) R1/2 (15mm) R3/4 (20mm)
Hot water connection male thread R1/2" (15mm) R1/2 (15mm) R3/4 (20mm)
Relief valve pressure setting kPa 1400
Weight dry kg 16 16 17
Dimensions (DxWxH) mm 165 x 350 x 575
SAIG Approval certificate no. GSCS20021. Watermark Certificate of compliance WMKA 00506
DATA PLATE
Left outside of cabinet.
GAS TYPE
The gas label is located on the left outside of cabinet.
The label will be either Natural Gas or LPG.
The nominated gas is the gas that this appliance is designed to operate with.
DO NOT OPERATE WITH ANY OTHER GAS TYPE.
WARNING LABELS
Located on the side of the cabinet. PLEASE READ THESE LABELS CAREFULLY.
INSTALLATION LOCATION
THIS HEATER IS APPROVED FOR OUTDOOR INSTALLATION ONLY.
IT IS NOT SUITABLE FOR INDOOR USE.
Refer AS 5601 for clearance details for flue terminal.
In addition, ensure that the appliance installation location permits easy access for maintenance
and operation.
MOUNTING THE APPLIANCE
The heater must be installed by using a fixing method which is sucient to support the weight
of the unit. See the technical sheet (page 7) for dimensions of mounting brackets and positions.
The top bracket has a centre hole so that the appliance can be positioned by hanging it on one
screw, then other screws can be secured.

9INSTALLATION INSTRUCTIONS
COLD WATER CONNECTION
HOT WATER CONNECTION
COLD WATER SUPPLY TO WATER HEATER
Refer to the Technical Sheet for the position of connections.
Copper tube of a minimum size of 1/2" (15mm) for 16 and 20 models and 3/4" (20mm)
for 26 model should be connected to the appliance.
The water inlet connections are R1/2" (15mm) male BSP for 16 and 20 models and R3/4"
(20mm) male BSP for 26 model 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.
ISOLATING 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.
If the above instruction is not carried out, all warranties on the unit will be voided.
Stop taps or combination stop taps and non-return valves are not to be used.
NOTE: No pressure reduction valve is required unless the inlet water pressure exceeds
1400kPa at any time.
Refer to Technical Sheet for the position of connection.
The outlet connection is male thread R1/2" (15mm) for 16 and 20 models and R3/4" (20mm) for
26 and requires union connection to allow for removal of the unit.
Install the hot water supply line to the unit with copper tube with a minimum of 1/2" (15mm) for
16 and 20 models and R3/4" (20mm) for 26 model.
For units set at 50°C, the distance to the first outlet must be a minimum of Four(4) metres.
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.

10 INSTALLATION INSTRUCTIONS
GAS CONNECTION
ELECTRICAL CONNECTION
Fit a union to the water heater gas inlet for easy connection and removal. The thread diameter
is R3/4" / (20mm).
THIS DOES NOT INDICATE THE SIZE OF THE GAS SUPPLY refer to AS 5601 for guidance on
pipe sizing.
Fit an approved isolating gas valve in the supply line adjacent to the water heater
gasconnection.
Ensure that the supply pipe and the gas pressure regulator (LPG or Natural Gas) has sucient
flow capacity for this and other appliances connected to the fitting line.
For LPG appliances ensure that gas cylinders are of sucient size. The water heater alone will
require a regulator of 4KG per hour capacity.
Before connecting the appliance to the gas service, purge any debris or air from the gas service.
Venting of purged gas shall be in an area free of sources of ignition.
Close the isolating gas valve prior to connection of the appliance.
After connection, check all joints for leaks with an approved leak tester.
Refer to AS 5601 Installation Code for pipe sizing details.
The Thermann 16/20/26 requires a minimum of 125/160/200 MJ/h respectively.
If the gas pipe sizing is insucient, the customer will not obtain the full performance benefit.
Gas pipe sizing must consider the gas input to this appliance as well as all the other gas
appliances in the premises.
Service calls are chargeable for units installed with incorrect pipe sizes.
1. The appliance is equipped with a three pinned earthed plug to be connected to a 240V 50Hz
power supply. The electrical rating of the appliance is 0.42/0.45/0.47Amp. for the Thermann
16/20/26 respectively.
2. The appliance requires a 240V 50Hz weatherproof power outlet installed in a protected
position adjacent to the appliance.
3. IMPORTANT: The appliance should always be disconnected from the power supply before
any maintenance is carried out.
TESTING THE WATER HEATER AFTER INSTALLATION IS COMPLETED.
Turn on power supply to the heater and allow approximately 30 seconds for the computer
to perform a safety check. Open a hot water tap and check the temperature of the hot
water supplied. The burners will not light if the flow rate is less than 3L/min.
IF THE UNIT FAILS TO OPERATE, CONSULT THE FAULT MONITOR (LAST PAGE).

11INSTALLATION INSTRUCTIONS
REMOTE CONTROLLERS
1. NUMBER OF CONTROLLERS
One, two or three remote control panels can be installed as optional extras.
2. CONTROLLER LOCATIONS
These controls are to be fitted in the following locations:
MAIN CONTROL - kitchen or laundry Model CMR-2254
BATHROOM CONTROL - main bathroom Model YST-2254
ENSUITE CONTROL - second bathroom Model YST-2254S
IMPORTANT
DO NOT locate the remote controls where they may come into contact with water.
DO NOT position the remote controls in the vicinity of chemicals.
DO NOT position the remote controls over a cooker, grill oven or toaster.
DO NOT position the remote controls where materials may spill onto them.
3. CONNECTION OF WIRING TO THE THERMANN UNIT
Remove the front cover from the unit.
Install the wiring to the Thermann main unit using conduit or by concealing the wires in the
wall cavity.
Install the wiring into the cabinet through the wiring access adjacent to the power cable.
Attach the wiring to the plate adjacent to the terminal block, using the cable clamp provided.
Then attach the wires to the terminals for the remote controls. Replace the front cover of the
water heater.

12 INSTALLATION INSTRUCTIONS
REMOTE CONTROLLERS
4. INSTALLATION OF MAIN CONTROLLER
Safety precautions
 •Connectremotecontrollercableafterheaterisunplugged.
 •NeverinstallMainremotecontrolleraboveacombustionappliancelikehotplateora
kitchen range. The heat will cause electrical component problems, or deform the exterior.
 •InstallMainremotecontrollerwhereitwillnotbesubjectedtosplashingwaterorsteam
from appliances.
 •DonotinstallMainremotecontrollerindirectsunlight.
 •DonotinstallMainremotecontrollerwhereanycommercialchemicalssuch
as ammonia, sulfur, chlorine, ethylenic compound and acids etc are used.
 •Theremotecontrollercablescarrylowvoltage,12VDC.
Installation
 •Installconduitinsideofwallinadvance.Alternativelyconcealwiresinsidewallcavity.
 •Passremotecontrollercablesthroughconduit/wallcavity.Thenpassthecables
through the hole of the fitting bracket and pull them out.
 •Attachthettingbracketwithscrews.
 •Connecttheremotecontrollercablestotheterminalontherearofthecontroller.
 •Fitcontrollertottingbracketandsecure.
Screw
Remote controller
fitting bracket
Hole for wiring
Cover
Cover
Screw
Detach right-and-left covers of the remote controller and fix them to the wall directly with screws.
Then attach the covers again.
Chemicals
Do Not

13INSTALLATION INSTRUCTIONS
REMOTE CONTROLLERS
5. INSTALLATION OF BATHROOM AND ENSUITE CONTROLLER
Safety precautions
 •Beforeremotecontrollerinstallation,checktheholepositionconsideringwallstudlocation.
 •Note:Donotdismantletheremotecontrollerduetowater-proofdesign.
 •Donotinstallremotecontrollerwherewaterwillcontacttheremotecontrollerdirectly.
 •Theremotecontrollercablescarrylowvoltage,12VDCdigital.
Installation
 •Drilla12mmholeinawallfortheremotecontrollercables.
 •Feedcontrollercabletocontrollerwalllocation.Pullcableendconnectorthroughhole.
 •Afterpassingtheremotecontrollercablesthroughthehole.Connecttothequick
connector on rear of controller and feed spare cable back into wall. Remove backing
paper from adhesive pad on rear of remote controller. Then attach the remote controller
to the wall.
 •Detachbothendcoversofremotecontrollerandxtheremotecontrollertothewallwith
screws (2pcs) in the screw holes provided. Do not tighten the screws excessively, as the
screw hole may be damaged. In case of mounting the remote controller on tile, cement or
mortar, use appropriate wall anchors. Then attach covers again.
Remote controller
adhesive pad
Remote controller
cables
Screw
Cover
Cover
Wall anchor
Remote controller cables

14 INSTALLATION INSTRUCTIONS
6. COMMISSIONING AND TESTING
After completing the installation of the unit, turn the water, power and gas supplies
on to theunit.
7. CONTROLS OPERATION
Turn the main remote control ON by pressing the ON/OFF button on the control
to the ON position. The ON indicator will illuminate.
The digital monitor will indicate 42°C and the priority indicator will illuminate.
Using the UP/DOWN buttons select the hot water temperature required. Turn on the hot water
supply tap. The flame logo indicator will show that hot water is being supplied.
Move to the bathroom control (if fitted). Press the PRIORITY BUTTON and repeat the
procedure. Press the priority button to turn OFF.
Move to the Ensuite control (if fitted). Press the PRIORITY BUTTON and repeat the procedure.
Press the priority button to turn OFF.
Alternatively, priority control can be regained at the main controller by switching OFF/ON.
THERE ARE NO MINOR ADJUSTMENTS THAT CAN BE MADE TO THE UNIT.
CONFIRM IGNITION, COMBUSTION AND EXTINCTION
Check ignition, combustion and extinction of the unit by the
burner indicator light of the controllers.
REMOTE CONTROLLERS

15INSTALLATION INSTRUCTIONS
REMOTE CONTROLLERS
Digital Monitor
Indicates the selected
water temperature. Error
messages flash in the
event of a failure.
ON Indicator
Indicates power is on
to the system.
ON/OFF Button
Power switch to
operate this control.
PRIORITY Indicator
Indicates this
controller has
prioritycontrol over
the other controller.
CMR-2254
(Main remote Controller)
This remote controller is intended to be used in
the kitchen, laundry room or utility area.
Flame Logo Indicator
Indicates that a hot
water faucet is open
and that control of
the temperature is by
another controller.
UP/DOWN Button
Increase or decrease
the desired water
temperature.

16 INSTALLATION INSTRUCTIONS
YST-2254
Bathroom Controller
YST-2254S
Ensuite Controller
These remote controllers are intended for
installation in the bathroom and ensuite.
ON Indicator
Indicates power
is on to the
system.
ON/OFF Button
Power switch
to operate this
control.
Digital Monitor
Indicates the selected
water temperature.
Error messages flash in
the event of failure.
Flame Logo Indicator
Indicates that a hot water
faucet is open and that control
of the temperature is by
another controller.
UP/DOWN Button
Increase or decrease
the desired water
temperature.
PRIORITY
Button
PRIORITY
Button to set
the water
temperature
on Bathroom
remote
controller.
PRIORITY
Indicator
Indicates this
controller has
priority control
over by
controller.
REMOTE CONTROLLERS

17INSTALLATION INSTRUCTIONS
WIRING DIAGRAM AND REMOTE CONTROLS
INSTALLATION SCHEMATIC
P
Y
BK
G
BL
O
R
GR
BR
W
W
W
W
W
WW
WW W BR
BL
G
G/Y
PROTECTOR
SURGE
250V
T5A
12
FUSE
11
AC240V
W
: Purple
: Yellow
: Black
: Green
: Blue
: Orange
: Red
: Grey
: Brown
: White
IGNITOR
SPARK ELECTRODE
6
BK
BK
BK
BK
BK
BK
8
G
W
YBL
R
O
FAN MOTOR
REMOTE
CONTROLLER
2
1
4
3
5
9
WATER FLOW SENSOR BK
GR
GR
R
W
GAS VALVE
(CONTROL) 10
DIP SWITCH
OW
P
BK G
Y
ON
MIN.
GC-156
MIN.
MIN MAX
BL
R
5
7
6
1
4
2
8
3
OFF
WATER FLOW
CONTROL VALVE
Y
Y
THERMAL FUSE
GAS VALVE 2 BL
O
Y
GAS VALVE 1
Y
GAS VALVE
(MAIN)
Y
YY
W
BK
BL
BK
AUTO
TRANSFORMER
THERMOSTAT
(ANTI-FROST)
ANTI-FROST HEATERS
250V
T3.15A
ONLY FOR 26NG/26LP
FAN MOTOR FUSE
W
W
BL
BL
W
W
W
W
PCB
PCB NO.
26NG GC-154
16NG
GC-155
MODEL
NAME
26LP
16LP
20NG
20LP
W
Y
Y
FLAME ROD
(OVER HEAT)
TEMPERATURE SENSOR
(OUTGOING TEMP.)
THERMOSTAT
TEMPERATURE SENSOR
(INCOMING TEMP.)
WIRING FROM MAIN UNIT
TO MAIN & BATHROOM/
ENSUITE REMOTE
CONTROLS
BATHROOM CONTROL
MAIN CONTROL
ENSUITE CONTROL
240volt POWER SUPPLY

18 INSTALLATION INSTRUCTIONS
FAULT MONITOR
When installed with remote controllers the THERMANN HOT WATER UNIT HAS A SELF
DIAGNOSING FUNCTION FOR FAULTS.
When the unit does not operate correctly an error code is displayed on the MAIN and
BATHROOM or ENSUITE remote controls TEMPERATURE DISPLAY INDICATOR.
The cause of the fault can be determined after checking the fault numbers display on the
remote control display.
DISPLAY PROBLEM REMEDY
111 GAS BURNER FAILS TO IGNITE CHECK GAS SUPPLY
721 FALSE FLAME DETECTION CALL REECE CUSTOMER CARE
1800 080 055
121 LOSS OF COMBUSTION CHECK GAS SUPPLY
AND PRESSURE
141 RESIDUAL FLAME SAFETY DEVICE CALL REECE CUSTOMER CARE
1800 080 055
311, 321 THERMISTOR WIRE BREAKAGE CALL REECE CUSTOMER CARE
1800 080 055
611 COMBUSTION FAN FAILURE CALL REECE CUSTOMER CARE
1800 080 055
740/750/760 COMMUNICATION FAILURE BETWEEN
REMOTE CONTROLS & PCB.
TURN OFF POWER AND
TURN ON AGAIN

Works for you.™
www.reece.com.au/Thermann
20732920