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