Rinnai VT16-26, HD200, HDi200, EF24, EF250 Installation Manual

Continuous ow
water heaters

Installation guide

Models: VT16-26, HD200, HDi200, HD250, EF24, EF250, EFi250

This appliance must be installed in accordance with:

- Manufacturer’s installation instructions

- Current AS/NZS3000, AS/NZS3500, AS/NZS 5601.1 and G12/AS1

- Local regulations and municipal building codes

For use with Natural Gas or Universal LPG as indicated on the appliance.

Not suitable as a spa or swimming pool heater.

Rinnai continuous flow internal water heaters
(‘i’ models) must be installed with an approved Rinnai flue system.

Appliance must be installed, commissioned and serviced by an authorised
person, being in New Zealand a licensed gasfitter, in accordance with
these instructions and all applicable local rules and regulations.

Warning

Improper installation, adjustment, alteration, service or maintenance can
cause property damage, personal injury or loss of life.

For more information about buying, using, and servicing of Rinnai appliances
call: 0800 RINNAI (0800 746 624)

Rinnai New Zealand Limited
105 Pavilion Drive, Mangere, Auckland
PO Box 53177, Auckland Airport, Auckland 2150

Phone: [phone], Fax: [phone]
Email: [e-mail]
Web: www.rinnai.co.nz, www.youtube.com/rinnainz

Important:

cnt:

Before installation 4

Appliance location 5

General installation information 7

Flued (internal) water heaters 8

Water delivery temperature 9

Connections and fittings 10

Dimensions: VT and HD models 11

Dimensions: EF models 12

EF250 models: Earthing the unit 13

EF models: Condensate drain 14

Controllers - general information 15

Controllers - Universal (Compact) 16

Controllers - Kitchen Deluxe 17

Controllers - Bathroom Deluxe 18

Controllers - communication cables 19

Commissioning 20

Recommended solar system layout 21

DIP switch settings - important 23

DIP switch settings 24

4 | Continuous Flow Water Heater Installation Guide 04-12

Before installation

Check for damage

Unpack the appliance and flue components (if applicable) and check for damage. DO NOT install any damaged
items.

Check components and gas type

Check all components have been supplied and that you have the correct gas type.

Read these instructions before starting

Read these instructions to get an overview of the steps required before starting the installation. Failure to follow
these instructions could cause a malfunction of the appliance. This could result in serious injury and property
damage.

Solar installations

For Rinnai continuous flow water heaters used in solar installations, refer ‘Recommended Solar System Layout’.

EF models are heavy

The Rinnai Infinity EF models are 32 kg. Please use care when lifting and seek assistance if required.

Applicable models

These installation instructions apply to the following Rinnai continuous flow water heaters.

Rinnai Infinity VT16 External REU-VR1620WG

Model number

Note: The model
number is written on
the data plate on the
left hand side of the
appliance.

Rinnai Infinity VT20 External REU-VR2024WG

Rinnai Infinity VT24 External REU-VR2426WG

Rinnai Infinity VT26 External REU-VR2626WG

Rinnai Infinity HD200 External REU-VRM2632WC

Rinnai Infinity HDi200 Internal REU-VR2632FFUC

Rinnai Infinity HD250 External REU-VR3237WG

Rinnai Infinity EF24 External REU-K2430WG

Rinnai Infinity EF250 External REU-KM3237WD

Rinnai Infinity EFi250 Internal REU-KM3237FFUD

i = internal—these must be installed with an approved Rinnai flue system

For nominated gas consumption, gas pressures, and gas types please refer to the data plate on the left hand side
of the appliance.

Continuous Flow Water Heater Installation Guide 04-12 | 5

Appliance location

Installation in environments
free from corrosive compounds

Air surrounding the water heater,
venting and vent termination(s) is
used for combustion and must be
free from compounds that cause
corrosion of internal components.
These include corrosive
compounds that are found in
aerosol sprays, detergents,
bleaches, cleaning solvents,
oil based paints/varnishes, and
refrigerants. Therefore Rinnai
recommends outdoor models be
used for these locations where
possible. The water heater, venting
and vent termination(s) should not
be installed in any areas where the
air may contain these corrosive
compounds. Chemicals that are
corrosive in nature should not
be stored or used near the water
heater or vent termination.

Damage and repair due to
corrosive compounds in the air is
not covered by warranty.

If it is necessary for a water heater
to be located in areas which may
contain corrosive compounds,
Rinnai strongly recommends the
following:

Indoor (internal) water heaters

- DO NOT install in areas where
contaminated air is present.

- Consider, before installation,
where air has the ability to
travel within the building.

- Where possible, install the
heater in a sealed closet so
that it is free of contaminated
indoor air.

Outdoor (external) water heaters
and vent terminations of indoor
(internal) water heaters

- Install as far away as possible
from exhaust vent hoods

- Install as far away as possible

from air inlet vents—corrosive
fumes may be released
through these vents when air
is not being run through them

Internal models

Internal models are
designed for indoor
installations only.
They may be installed
in an enclosure if the

requirements of
AS/NZS 5601.1 are satisfied.
An enclosure is defined as a
compartment, enclosed area or
partitioned off space primarily
used for the installation of the
appliance. If installed in an
enclosure either internally or
externally, the location should be
ventilated to allow gas to dissipate.

They must be mounted on a
vertical structure with the water
and gas connections on the
underside pointing downwards.
For appliances installed in roof
spaces or elevated structures,
specific requirements apply. Refer
to AS/NZS 5601.1 for details.

Catch pan

It is important that a suitably
drained catch pan is fitted
where damage could be
caused by discharge from the
water heater. Provision must
be made for safe disposal
of any leaking water to an
external location.

This appliance MUST be used with
the appropriate Rinnai flue system.

This appliance must be located
so that the flue terminal exits the
building at a suitable point, refer
‘Minimum Clearances Required for
Flue Terminals’, in AS/NZS 5601.1
Fig 6.2.

Manufacturer’s instructions for
model REU-KM3237FFUD (EFi250);
for reference j, gas appliances over
200 MJ/h input, use ≥ 300 mm.

External models

External models are
designed for outdoor
installations only. They
must be located in an
above ground open-air

situation with natural
ventilation, without stagnant
areas, and where gas leakage and
products of combustion are rapidly
dispersed by wind and natural
convection.

They must be mounted on a
vertical structure with the water
and gas connections on the
underside pointing downwards.
For appliances installed on
elevated structures or under floors
specific requirements apply. Refer
to AS/NZS 5601.1 Fig 6.2 for details.

This appliance must be located
so that the flue terminal exits the
building at a suitable point, refer
‘Minimum Clearances Required for
Flue Terminals’, AS/NZS 5601.1
Fig 6.2.

Manufacturer’s instructions for
model REU-KM3237WD (EF250);
for reference j, gas appliances over
200 MJ/h input, use ≥ 300 mm.

Horizontal obstructions
AS/NZS 5601 stipulates a minimum

horizontal clearance of 500 mm
between a building structure and
obstruction facing the terminal.
At 500 mm the obstruction needs
to be the full height of the unit
(as shown), and not a partial
obstruction. A partial obstruction
of less than 1 m could result in wind
pushing flue gases back into the
flue terminal.

CAUTION

500 mm

At 500 mm the obstruction
needs to be the full height of
the unit.

500 mm

DO NOT

6 | Continuous Flow Water Heater Installation Guide 04-12

When multiple units of the
same model are installed on the
same vertical face, with the flue
terminals at the same height, they
can be installed next to each other
(as shown).

All models

This appliance must be placed
as close as possible to the most
frequently used hot water outlet
or outlets to minimise the delay for
hot water delivery.

For installations where the distance
between the water heater and
the outlets is considerable, a
flow and return system can be
used to minimise the waiting
time for hot water delivery.
Alternatively, multiple appliances
can be strategically placed to serve
different outlets. Contact Rinnai
for further information.

An AC 230 V, 10 Amp, earthed
power point must be provided
adjacent to the appliance. For
outdoor installations, this power
point must be weatherproof. It
must be clear of the gas and water
connections to the appliance and
also the flue exhaust and water
pressure relief valve. The power
cord of the appliance is 1.5 m long.

All appliances must be installed
to ensure access can be gained
without hazard or undue difficulty
for inspection, repair, renewal or
operational purposes. Sufficient
clearances shall allow access to
and removal of all serviceable
components.

Appliances should not be mounted
higher than 3.5 m above the
ground or floor level unless the
customer can arrange permanent
and safe access or can provide
another means of access such as
scissor or boom lifts.

Clearances from combustible
materials

The appliance can be mounted
directly against the wall or
structure. There is no need to
use non-combustible sheeting
or leave an air gap between the
appliance back panel and the wall
or structure for the purposes of
meeting the temperature hazard
requirements of AS/NZS 5601.

Continuous Flow Water Heater Installation Guide 04-12 | 7

General installation information

Catch pan

It is important a suitably drained
catch pan is fitted (especially for
internal units) where damage
could be caused by discharge
from the water heater. Provision
must be made for safe disposal of
any leaking water to an external
location.

Mounting the appliance

Refer ‘Connections and Fittings’ for
individual appliance weights. The
wall or structure on which these
units are to be mounted must
be capable of supporting these
weights and the associated pipe
work.

Ensure suitable fixing screws or
bolts are used to secure the units
to the walls, in accordance with
AS/NZS 5601.1. Wooden plugs shall
not be used.

The top bracket has a keyhole slot
(circled below) so the appliance
can be positioned by hanging it on
one screw while the other screws
are secured.

Circuit diagrams

Refer to commissioning sheet
supplied with the appliance (inside
front cover of appliance).

Pipe sizing

Refer ‘Connections and
Fittings’ for appliance
gas consumption. If

the gas pipe sizing is
insufficient the customer will not
get 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. The gas meter and
regulator must be specified for this
gas rate.

An approved sizing chart such
as the one in AS/NZS 5601.1, or
proprietary system manufacturer
guide should be used.

Water pipe sizing and layout should
be performed in accordance
with AS/NZS 3500. All hot water
pipe work should be insulated to
optimise performance and energy
efficiency.

Water supply

Refer ‘Connections
and Fittings’ for
applicable water

pressures. Approved
pressure limiting valves may be
required if the stated maximum
rated water supply pressures are
exceeded. To achieve the rated
flow, the stated minimum water
supply pressures must be supplied.
The water heaters will operate
at lower pressures but will not
achieve the rated flow.

Water chemistry and impurity
limits are stated in our detailed
warranty statement. Most
metropolitan water supplies fall
within these requirements. If you
are unsure about the quality of
the water, please contact Rinnai
and we will provide you with the
details of an authorised agency
who are able to test your water for
compliance to Rinnai standards. If
sludge or foreign matter is present
in the water supply, a suitable filter
or strainer should be incorporated
in the water supply to the water
heater.

8 | Continuous Flow Water Heater Installation Guide 04-12

Flued (internal) water heaters

This water heater must be fitted with the appropriate Rinnai flue system.

The chart below highlights the maximum flue length and number of bends. It also shows the difference between a
short and long flue—this is important if changing settings (DIP switches).

Number of 90 Degree Bends

0 1 2 3 4

Flue Length (m)

1

2

3

4

5

6

7

9

11

13

15

Refer to separate Rinnai flue guide for further details.

Short flue
setting

Long flue
setting

Maximum flue length

Continuous Flow Water Heater Installation Guide 04-12 | 9

Water delivery temperature

Local regulations and/or requirements of AS/NZS3500.4 must be considered regarding the temperature
limitations of hot water supplied to areas used primarily for personal hygiene. The temperature of these areas may
be limited to 55 °C or less.

If the appliance is to deliver water primarily for the purposes of personal hygiene in an early childhood centre,
school, nursing home or similar facility as defined in AS/NZ3500.4 a Temperature Limiting Device (TLD), such as
a Tempering Valve may be required (even if the appliance is set to 55 °C or less). For these types of applications
contact Rinnai.

Requirements for Rinnai continuous flow units installed without controllers

When the continuous flow unit is set to deliver water at a temperature higher than 55 °C, it will be necessary to fit a
Temperature Limiting Device for delivery to areas used for the purposes of personal hygiene.

Diagram 1 - 55 °C Appliance

55 °C

Diagram 2 - Not a 55 °C Appliance

(TLD = Temperature Limiting Device)

> 55 °C > 55 °C < 55 °C < 55 °C

10 | Continuous Flow Water Heater Installation Guide 04-12

Connections and ttings

Models Gas consumption

MJ/h

Water Supply
kPa

Min. Max.

Weight kgFittings

Hot Cold Gas

Condensate

VT16 external

REU-VR1620WG

125 120 1000 15 R½

(15 mm)

R½
(15 mm)

R¾
(20 mm)

N/A

VT20 external

REU-VR2024WG

160 160 1000 16 R¾

(20 mm)

R¾
(20 mm)

R¾
(20 mm)

N/A

VT24 external

REU-VR2426WG

188 180 1000 17 R¾

(20 mm)

R¾
(20 mm)

R¾
(20 mm)

N/A

VT26 external

REU-VR2626WG

199 180 1000 17 R¾

(20 mm)

R¾
(20 mm)

R¾
(20 mm)

N/A

HD200 external

REU-VRM2632WC

199 140 1000 21 R¾

(20 mm)

R¾
(20 mm)

R¾
(20 mm)

N/A

HDi200 internal

REU-VR2632FFUG

195 140 1000 21 R¾

(20 mm)

R¾
(20 mm)

R¾
(20 mm)

N/A

HD250 external

REU-VR3237WG

249 200 1000 29 R¾

(20 mm)

R¾
(20 mm)

R¾
(20 mm)

N/A

EF24 external

REU-K2430WG

162 240 1000 27 R¾

(20 mm)

R¾
(20 mm)

R¾
(20 mm)

R½
(15 mm)

EF250 external

REU-KM3237WD

211 240 1000 32 R¾

(20 mm)

R¾
(20 mm)

R¾
(20 mm)

R½
(15 mm)

EFI250 internal

REU-KM3237FFUD

211 240 1000 32 R¾

(20 mm)

R¾
(20 mm)

R¾
(20 mm)

R½
(15 mm)

Service connection points

These dimensions are NOT an indication of the pipe sizes required.

An approved full flow isolation valve and disconnection union MUST be fitted to the cold water inlet. A non-return
valve is not required unless required by local regulations.

Isolation valves must be fitted so the appliance can be removed.

Purge gas and cold water supply lines to remove air and swarf before final connection of the appliance. Swarf in
the gas or water supplies may cause damage.

Continuous Flow Water Heater Installation Guide 04-12 | 11

Dimensions: VT and HD models

B

D

C

M

A

E

F

J

L

H

G

I

K

O

N

P

Dimensions table (mm)

VT16 external

(REU-VR1620WG)

VT20 external

(REU-VR2024WG)

VT24 external

(REU-VR2426WG)

VT26 external

(REU-VR2626WG)

HD200 external

(REU-VRM2632WC)

HDi200 internal

(REU-VR2632FFUG)

HD250 external

(REU-VR3237WG)

A Width 350 350 350 350 350 350 470

B Depth 194 194 194 194 250 235~275 244

C Height - unit 530 530 530 530 600 600 600

D Height - including brackets 571 571 571 571 636 641 644

E Hot water outlet (from wall) 87 87 87 87 95 91~131 115

F Hot water outlet (from centre) 105 105 105 105 110 110 61

G Cold water inlet (from wall) 68 68 68 68 74 70~110 99

H Cold water inlet (from centre) 10 10 10 10 27* 27* 52

I Gas connection (from wall) 77 77 77 77 103 99~139 61

J Gas connection (from centre) 83 83 83 83 89 89 110

K Condensate outlet (from wall) - - - - - - -

L Condensate outlet (from centre) - - - - - - -

M Gas: Length gas connection (from base) 40 40 40 40 41 41 41

Cold: Length of cold water inlet (from base) 50 50 50 50 51 51 51

Hot: Length of hot water outlet (from base) 39 39 39 39 42 42 42

N Electrical connection (from centre) 45 45 45 45 21** 21** 2**

O Electrical connection (from wall) 128 128 128 128 160 160~200 100

P Flue spigot centre line (from wall) - - - - - 95~135 -

* This measurement is to the left of the centre line ** This measurement is to the right of the centre
line

HDi200, height of flue spigot from base of unit approx. 85 mm

12 | Continuous Flow Water Heater Installation Guide 04-12

Dimensions: EF models

Dimensions table (mm) EF24 external

(REU-K2430WG)

EF250 external

(REU-KM3237WD)

EFi250 internal
(REU-KM3237FFUD)

A Width 350 470 470

B Depth 277 283.1 257~307

C Height - unit 600 654 654

D Height - including brackets 644 721.6 721.6

E Hot water outlet (from wall) 164.5 100 100~140

F Hot water outlet (from centre) 100 100 100

G Cold water inlet (from wall) 83 64.6 64.6~104

H Cold water inlet (from centre) 53* 27.2 2 7.7

I Gas connection (from wall) 70.5 89 89~129

J Gas connection (from centre) 25 103.2 103.2

K Condensate outlet (from wall) 33 122.6 122.6

L Condensate outlet (from centre) 132 195 195

M Gas: Length gas connection (from base) 51 40.2 40.2

Cold: Length of cold water inlet (from base) 62 50.2 50. 2

Hot: Length of hot water outlet (from base) 41 41.2 41.2

Condensate connection length (from base) 24 2 2.4 22 .4

N Electrical connection (from centre) 10** 49 49

O Electrical connection (from wall) 175 200 200~240

P Flue spigot centre line (from wall) - - 155~195

* This measurement is to the left of the centre line

** This measurement is to the right of the centre line

B

D

C

M

A

E

F

J

L

H

G

I

K

O

N

P

Continuous Flow Water Heater Installation Guide 04-12 | 13

EF250 models: Earthing the unit

Removing the cover and earthing the unit

For the Rinnai condensing continuous flow water heaters (EF250 & EFi250), the earthing screws are located under
the side trim, refer image below. First remove the trim and then the earthing screws before lifting off the cover.

For safe operation of the appliance the earthing screws MUST be replaced.

WARNING

Earthing screws located under side trim

14 | Continuous Flow Water Heater Installation Guide 04-12

EF models: Condensate drain

The Rinnai Infinity EF water heaters
generate condensate continuously
at a rate of up to five litres per hour
as a by-product of a highly efficient
gas burner. Condensate must be
drained via a pipe to a suitable
discharge point.

As condensate is a by-product of
gas combustion it is mildly acidic.
For this reason copper tube and
fittings MUST NOT be used as
it will corrode. Instead Rinnai
recommend plastic pipes and
fittings.

Important considerations for the
condensate drain pipe

Content of AS3500.4.2003 section

5.12 ‘Temperature/Pressure Relief
and Expansion Control Valve Drain
Lines’ has been used as a guide in
preparing these considerations.

A. Water heater drain outlet

connection, ½ “ (15 mm) BSP
male.

B. PE ½ “BSP (15 mm) female

to barbed ignition system
connector (13-19 mm) or
equivalent plastic fitting.

C. Drain pipe and fittings to

match (B).

D. Continuous fall of at least 2°

from water heater to discharge
point, length and bends in
accordance with ‘Maximum
length and changes of
direction greater than 45°’.

E. Suitable points of discharge

are deemed to be sewers or
pits. DO NOT discharge onto
electrical connections, earth
stakes, copper pipes, concrete
paths, or into a pond.

Maximum length and changes of
direction greater than 45°

Length and changes of direction

Max. length (m)

9 8 7 6

Max. changes of
direction (> 45°)

3 4 5 6

Installation of a condensate
drain

Point of discharge from each drain
line shall be located so the release
of condensate does not cause a
nuisance, is readily discernible and
incurs no risk of building damage.
There shall be no tap, valve or
other restrictions in any line. Each
line shall fall continuously from
the valve to the approved point of
discharge.

Drain lines shall not discharge into
a storage water heater safe tray.
The end of the condensate drain
line shall be:

- Not lower than 200 mm, or
higher than 300 mm above an
unpaved surface; or

- Not lower than 75 mm, or
higher than 300 mm above a
gravel pit, and not less than
100 mm in diameter in a paved
surface.

Where discharging over a tundish
or gully trap, drain lines shall have
an air gap of a size at least twice
the diameter of a drain line.

Joining of condensate drain lines

Condensate drain lines from
multiple water heaters may be
joined together provided they
conform with the installation
requirements stated on this page.

Common stack discharge

Where individual heaters are
installed in a multistory building,
the condensate drain lines may
discharge into a common stack
subject to the following:

- Drained to a tundish having
a discharge line that is not
less than the common stack,
directly connected to a
fixture trap, and installed in a
connection with any adjacent
soil or waste stack.

- Discharge point of the
common stack is readily
visible and does not cause any
nuisance.

- Common stack is vented by
extending the pipe upwards,
above the roof level.

Tundish drain lines

The drain line from any tundish
shall be not less than DN 20 or less
than one size larger than that of
the largest drain line discharging
into the tundish. Tundish drain
lines shall comply with the
installation requirements above.

Areas subject to freezing

In areas where water pipes are
prone to freezing, the drain pipe
from any valve shall be insulated
and not exceed 300 mm in length.
It shall discharge into a tundish
through an air gap of not less than
75 mm and not exceed more than
150 mm measured from the outlet
of the drain pipe to the rim of the
tundish.

Continuous Flow Water Heater Installation Guide 04-12 | 15

Controllers - general information

Water controllers are available as an optional extra. Universal (Compact), Deluxe, and
Wireless controllers can be used together.

Maximum number of controllers

A maximum of four water
controllers can be fitted with the
following limitations:

- Max. of one Kitchen Deluxe
controller (MV-100V)

- Max. of two Bathroom Deluxe
controllers (BC-100V)

Only one controller can be set
to deliver 55 °C, this cannot be a
Bathroom Deluxe controller.

This next section refers to wired
controllers. For details on wireless
controllers refer to separate
instructions.

Important

Others manufacturers’ controllers
are not compatible with Rinnai
Infinity continuous flow water
heaters.

Installation of controllers

Do not install controllers:

- near a heat source such as,
a cook top, stove or oven—
heat, steam, smoke, or hot oil
may cause damage

- in direct sunlight

- outdoors unless protection
from dust ingress and sunlight
are provided

- against a metal wall unless in
accordance with AS3000

Positioning

Controllers must be installed in
shaded and clean locations. They
should be fitted out of reach of
children (suggested height

1.5 m). The Compact and Bathroom
Deluxe Controllers are water
resistant, however, durability is
improved when positioned outside
the shower recess or at least 400
mm above the highest part of a
sink, basin or bath.

A

B

C

D

Dim. Description Compact

(MC-91)

Kitchen Deluxe
(MC-100V)

Bathroom Deluxe
(BC-100V)

A Distance between

mounting holes

83 83 181

B Width 90 120 195

C Height 120 120 97

D Depth 20 20 22

Water controller cables

Water controllers operate at extra
low voltage (12 Volts DC) which is
supplied from the water heater.
Controllers come with 15 m of
electrical cable. The appliance end
of the controller cables are fitted
with spade terminals.

Extension cabling is available
as an accessory from Rinnai.
Alternatively, a two core sheathed
(double insulated) flex with a
minimum cross sectional area of

0.5 mm2 may be used.

Maximum individual cable runs:
One controller = 100 m
Two controllers = 50 m*
Three plus controllers = 20 m*

* per controller

Water controller cables are not
polarity sensitive.

Dimensions

16 | Continuous Flow Water Heater Installation Guide 04-12

Controllers - Universal (Compact)

Fitting the Universal (Compact)
controller

1. Determine the most suitable
position for the controller.

2. Drill three holes as shown
(Fig. 1 and Fig. 2) for securing
screws and one to provide
cable access.

3. When running cable through
the access hole ensure the
connector and the end of the
cable is located nearest to the
controller (Fig. 2).

4. Carefully remove the face plate
from the controller using the
screwdriver (Fig. 3).

5. Fix the controller to the wall
using appropriate fittings as
shown (Fig. 4).

6. Remove protective plastic
from the controller face as
shown (Fig. 4) and replace the
face plate.

Optional programming of the
Universal controller

Step one
Are four controllers connected?

If NO—refer to step two. If YES,
activate the fourth controller as
follows.

1. For the controller in the
kitchen only, press and hold
the ‘Transfer’ and ‘On/Off’
buttons simultaneously until a
beep is heard (approximately
five seconds).

2. Check display on all four
controllers is displaying a
temperature when switched
on. If any controller displays
two dashes, repeat above step.

Step two

1. For the controller in the
kitchen only, press and hold
the ‘Transfer’ and ‘On/Off’
buttons simultaneously until a
beep is heard (approximately
five seconds).

2. When the controller fitted
in the kitchen is switched on
it will be possible to select
temperatures higher than
50 °C (at this controller). If not
repeat above step.

If the kitchen controller is
swapped repeat the programming
procedure.

83

41.5

120

Outline of Water Control

90

Securing

Screw

Ø20 Cable Access

Fig.1

Connector

Controller Cable

Fig.2

Face Plate

Fig.3

Face Plate

Screw

Film

Fig.4

Continuous Flow Water Heater Installation Guide 04-12 | 17

Controllers - Kitchen Deluxe

Installation

1. Determine the most suitable
position for the controller.

2. Use the wall mounting bracket
as a template to mark and drill
three holes, locating the cable
access hole as shown.

3. Fix the mounting bracket to
the wall using the appropriate
fixings.

4. Run the water controller cable
through the hole in the wall.

5. Carefully remove the face plate
from the controller using a
screwdriver as shown.

6. Connect the controller
cable to the kitchen water
controller. At this point cables
from other controllers (if
fitted) may also be connected
to the kitchen water terminals,
eliminating the need for
multiple cable runs directly to
the water heater. Feed excess
cable lengths into the wall
cavity to avoid pinching of
cables between the wall and
the water controllers.

7. Fasten water controllers to wall
mounting bracket. Avoid the
use of impact drills and over­tightening of fixings as this
may damage the controllers.

8. Remove the protective plastic
from the controller face and
replace the face plate.

Outline of Water Controller

Screw Securing Points

128

120

Ø20 Cable Access

18 | Continuous Flow Water Heater Installation Guide 04-12

Controllers - Bathroom Deluxe

Installation

1. Determine the most suitable
position for the controller.

2. Mark and drill three holes,
locating the cable access hole
as shown (Fig.1).

3. When running a cable through
the access hole ensure the
connector end of the cable
is located nearest to the
controller (Fig.2).

4. Affix the double sided self­adhesive seal to the back of
the controller (Fig.3).

5. Carefully remove the face plate
from the controller. Do this
by placing your thumbs on
the front digital display while
hooking your fingers behind
the top plate and gently push
down as shown (Fig.4). Do not
use a screwdriver as this may
damage the controller.

6. Connect the cable to the
bathroom controller. Feed
excess cable lengths into the
wall cavity to avoid pinching of
cables between the wall and
the controller.

7. Fix bathroom controller to the
wall using appropriate fixings.
Avoid the use of impact
drills and over-tightening of
fixings as this may damage the
controller.

8. Remove the protective plastic
from the controller face and
replace the face plate.

181

195

Outline of Water Controller

97

Securing
Screw

Ø20 Cable Access

Fig.1

Connector

Controller Cable

Fig.2

Backing Seal

Remove

to expose

self-adhesive

Fig.3

Fig.4

Continuous Flow Water Heater Installation Guide 04-12 | 19

Controllers - communication cables

Communication cables connect the water heater to the water controllers and
operate at an extra low voltage (12 Volts DC) which is supplied from the water heater.
Communication cables are supplied with the water controllers (15 m) and are fitted with
spade terminals for connection to the water heater.

Up to two cables can be connected
to the cable connector at the
water heater. Extension cables are
available from Rinnai. Alternatively
two core sheathed (double
insulated) flex with a minimum
cross sectional area of 0.5 mm2
may be used (refer maximum
individual cable lengths on p. 15).

Do not attempt to connect
cables to the cable
connector at the water

heater unless the electric
power supply to the water heater is
switched off otherwise damage to
electrical components may occur.

To connect up to two cables to
the cable connector

1. Turn off power supply and

unplug water heater from the
power point.

2. Remove retaining screw of the

cable connector at the base of
the appliance.

3. Swing the cable connector

door open. Thread the cable
through the weather seal of
the cable access hole (B) in
the direction shown allowing
sufficient cable length so the
cable sheath can be secured
with the cable clamp (C)
supplied with the transceiver.

4. Loosen screw terminals (D)

and (E) and connect cable
spade connectors to these
terminals and re-tighten.
Polarity is not important,
either wire colour can be
connected to either terminal.

5. Return the cable connector

to the original position taking
care not to damage cable wires
in the process and replace the
retaining screw.

CAUTION

Connecting three to four
controllers

1. Repeat steps 1-3 for
connecting up to two
controllers.

2. To connect three to four
controllers, separate all the
cables to be fitted into pairs.
Cut off the existing spade
connectors from each pair and
re-terminate each pair into
a new spade connector (F)
so there are only two sets of
spade connectors. Four spade
connectors in total to be
terminated.

3. Repeat steps 4 and 5 for
connecting up to two
controllers.

Spade connectors are available
from your local electrical supplier.

Three

Cables

Four

Cables

F F F

B

C

E

D

Cable connector for VT26, VT24, VT20, and VT16

Cable connector for HD250, HD200, HDi200, and EF models

B

C

D

E

20 | Continuous Flow Water Heater Installation Guide 04-12

Commissioning

The appliance operation must be tested after installation. Ensure building
occupants do not have access to the hot water outlets during this procedure.

WARNING

Testing

1. Before final connection of the
water heater, purge the gas
and hot and cold water supply
lines. Swarf in the gas or water
supplies may cause damage.

2. Turn on the gas and water
supplies and test for leaks (gas
and water) near the unit.

3. Isolate gas supply. Remove test
point screw located on the
gas inlet and attach pressure
gauge.

4. Turn the power on at the
power point socket and turn
on the gas.

5. If water controllers are fitted
ensure they are on. Select
the maximum delivery
temperature and open all
available hot water taps
including the shower. If water
controllers are not fitted, open
all available hot water taps.

6. Operate all other gas
appliances at their maximum
gas rate.

7. With all gas appliances
operating on maximum, the
pressure should read between

1.0-3.5 kPa (NG) or 2.75-3.5 kPa
(LPG). If the pressure is lower,
the gas supply is inadequate
and the appliance will not
operate to specification. It
is the responsibility of the
installer to check the gas
meter, service regulator
and pipe work for correct
operation and sizing. The gas
regulator on the appliance
is electronically controlled
and factory preset. Under

normal circumstances it does
not need adjustment during
installation.

8. Close all hot water outlets.

9. Inspect and clean the strainer
located on the cold water
inlet connection. This may
need to be repeated to ensure
the strainer remains clear,
especially on new installations.

10. If water controllers are
fitted, it is necessary to test
their operation through the
complete range of functions
(refer operation guide).

11. Confirm hot water delivery
temperatures using a
thermometer. If controllers are
fitted, ensure temperatures
exceeding 55 °C cannot
be selected on bathroom
controllers.

12. After testing is completed,
explain to the customer how
to operate the water heater
and water controllers (if
fitted). Ensure your details
are entered in the customer
operation guide (Installer
details).

Gas pressure setting

The gas regulator on the appliance
is electronically controlled and
factory preset. Under normal
circumstances it does not need
adjustment during installation.
Make adjustments only if the
unit is not operating correctly
and all other causes for incorrect
operation have been eliminated.
Instructions for gas pressure
setting are in the instruction
pocket located inside the
appliance front cover.

Commissioning checklist

Commission the unit in accordance
with the Commissioning Checklist
supplied with the appliance (inside
front cover of appliance). Ensure
you leave the completed checklist
with the customer.

If the appliance can not be
adjusted to perform correctly call
0800 RINNAI (0800 746 624) for
assistance.

Continuous Flow Water Heater Installation Guide 04-12 | 21

Recommended solar system layout

Rinnai continuous flow water heaters configured for solar systems produce hot water at
75 °C and are not suitable for use with water controllers. The household water supply
MUST be protected by a suitable tempering valve.

Installation

Rinnai continuous flow water
heaters in solar installations are
only suitable as gas boosters in
solar hot water systems. These
models produce water at higher
than normal temperatures and
must be connected to the hot
water supply by use of a suitable
tempering valve.

Install a Rinnai continuous flow
water heater using a flow diversion
valve as shown. Remember ‘B to
Boiler’ when setting up the flow
diversion valve.

The water heater must be set to
75 °C (refer dip switch settings on
following pages).

Rinnai water controllers cannot be
used with Rinnai Infinity solar units
as the hot water does not always
pass through the Rinnai Infinity,
and the Rinnai Infinity dip switch
setting of 75 °C is unable to be
adjusted.

System configuration to protect
for Legionella

If the system is configured
according to the details above
it will meet the requirements of
the Acceptable Solution G12/AS2
for protection against Legionella.
Section 3.5.2 states:

b) the instantaneous water heater
must heat all water passing
through it to not less than 70 °C.

Recommended system layout using a Rinnai Continuous Flow water Heater and Flow Diversion
Valve

DIP switch
settings

Continuous Flow Water Heater Installation Guide 04-12 | 23

DIP switch settings - important

DIP switch settings must only be changed by a licensed gasfitter. They have been
provided as there may be a requirement to change the temperature of the water
delivered from the water heater.

WARNING

On

Care must be taken
when changing the

temperature settings as
the DIP switches are small and can
be easily switched or bumped into
the wrong position. Please use
this information carefully and fully
check the operation of the water
heater before leaving site including
the temperature of the water
delivered.

The cover of the water heater will
need to be removed to carry out
this operation. As this will expose
live mains voltage wiring please

disconnect the power supply
before removing the front cover.

We wish to draw your attention
to the requirements of the New
Zealand Building Code and
compliance document G12. This
requires that water delivered to
sanitary fixtures be no more than
55 °C. Increasing the water heater
set temperature will therefore
require that you protect all sanitary
fixtures to which the appliance is
plumbed with suitable tempering
valves or similar.

Rinnai will accept no liability for
issues arising out of the use of this
DIP switch information.

If you have any doubts about the
performance of the water heater
please contact Rinnai by phoning
0800 TO RINNAI (0800 86 746

624).

The setting of water temperatures
in domestic model Infinity units
(white cases) to greater than
55 °C (with the exception of units
set to 75 °C in domestic solar
installations) will reduce the
warranty period. Refer to warranty

information in the Operation
Guide for further information.

The following pages detail DIP
switch settings for the specific
Rinnai continuous flow water
heaters listed. They ARE NOT
applicable for older models.

Legend for DIP switch settings

(black indicates position of switch)

Short and long flues

Reference to what is a short and
long flue can be found on page 8.

Off

24 | Continuous Flow Water Heater Installation Guide 04-12

DIP switch settings

Applicable models and REU numbers

Rinnai Infinity VT16 External REU-VR1620WG
Rinnai Infinity VT20 External REU-VR2024WG
Rinnai Infinity VT24 External REU-VR2426WG
Rinnai Infinity VT26 External REU-VR2626WG
Rinnai Infinity EF24 External REU-K2430WG

DIP switch 1: Upper SW (8P)

SW No. Note

1 Off

2

Fixed temperature
(with controllers)

Off Fixed temperature On With controllers

3
4
5

Temperature settings See Chart A

6 Off

7

Gas pressure

Off

Normal

On

Forced min.

On

Forced max.

8 Off Off On

Chart A: Temperature settings

DIP. SW.1-SW No. (8P) SW No. 2 = Off

(fixed temperature)

SW No. 2 = On
(with controllers)

3 4 5 No controllers

(fixed temp.)

No controllers (fixed
temp.)

With controllers
(max. set temp.)

Off Off Off 55 55 55

On Off Off 75 55 75

Off On Off 65 55 65

On On Off 60 55 60

Off Off On 50 50 50

On Off On 42 42 42

Off On On not to be used 40 40

On On On not to be used 55 75

DIP switch 2: Lower SW (4P)

SW No. Note

1 Gas type Off LPG On NG

2,3,4 Model settings See Chart B

Chart B: Model settings

DIP. SW.2-SW No. (4P) Model (REU-number)

2 3 4

Off Off Off VT26 (VR2626WG) and EF24 (K2430WG)

Off On Off VT24 (VR2426WG)

Off Off On VT20 (VR2024WG)

Off On On VT16 (VR1620WG)

On

Off

Continuous Flow Water Heater Installation Guide 04-12 | 25

DIP switch settings

Applicable models and REU numbers

Rinnai Infinity HD200 External REU-VRM2632WC
Rinnai Infinity HDi200 Internal REU-VR2632FFUG
Rinnai Infinity HD250 External REU-VR3237WG

DIP switch 1: Upper SW (8P)

SW No. Note

1 Off

2

Fixed temperature
(with controllers)

Off Fixed temperature On With controllers

3
4
5

Temperature settings See Chart A

6 Off

7

Gas pressure

Off

Normal

On

Forced min.

On

Forced max.

8 Off Off On

Chart A: Temperature settings

DIP. SW.1-SW No. (8P) SW No. 2 = Off

(fixed temperature)

SW No. 2 = On
(with controllers)

3 4 5 No controllers

(fixed temp.)

No controllers (fixed
temp.)

With controllers
(max. set temp.)

Off Off Off 55 55 55

On Off Off 75 55 75

Off On Off 65 55 65

On On Off 60 55 60

Off Off On 50 50 50

On Off On 42 42 42

Off On On 85, 95

1

40 40

On On On 85 55 75

1

95 °C setting only available for HD250 model

DIP switch 2: Lower SW (4P)

SW No. Note

1 Gas type Off LPG On NG

2,3,4 Model settings See Chart B

5,6 Not in use Off

Chart B: Model settings

DIP. SW.2-SW No. (4P) Model (REU-number)

2 3 4

Off Off Off HD250 (VR3237WG)

Off Off On HD200 (VRM2632WC)

Off On On HDi200 (VR2632FFUG)

On

Off

26 | Continuous Flow Water Heater Installation Guide 04-12

DIP switch settings

On

Off

Applicable models and REU numbers

Rinnai Infinity EF250 External REU-KM3237WD
Rinnai Infinity EFi250 Internal REU-KM3237FFUD

DIP switch 1: Upper SW (8P)

SW No. Note

1 Flue settings Off

EF250 Ext & EFi250 Int long flue
(p. 8)

On

EFi250 Internal short flue
(p. 8)

2

Fixed temperature
(with controllers)

Off Fixed temperature On With controllers

3
4
5

Temperature settings See Chart A

6 Not in use Factory setting is ‘Off’

7

Gas pressure

Off

Normal

On

Forced min.

On

Forced max.

8 Off Off On

Chart A: Temperature settings

DIP. SW.1-SW No. (8P) SW No. 2 = Off

(fixed temperature)

SW No. 2 = On
(with controllers)

3 4 5 No controllers (fixed

temp.)

No controllers (fixed
temp.)

With controllers
(max. set temp.)

Off Off Off 55 55 55

On Off Off 75 55 75

Off On Off 65 55 65

On On Off 60 55 60

Off Off On 50 50 50

On Off On 42 42 42

Off On On 95 40 40

On On On 85 55 75

DIP switch 2: Lower SW (4P)

SW No. Note

1

Gas type settings

Off

LPG

On

NG

2 Off Off

3

Type settings

Off

External

Off

Internal

4 Off On

5 Automatic return Off Inactive On Active

6 External device Off S-BMS On AH

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Installation Manual

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