Rinnai Infinity VT16 REU-VR1620WG User manual

Continuous Flow Water
Heaters
Installation Manual
Models are not suitable as a spa or swimming pool heater.
Internal Rinnai continuous ow internal water heaters (‘i’ models) must be installed with an
approved Rinnai ue system.
Appliance must be installed, commissioned and serviced by a licensed tradesperson in
accordance with these instructions and all applicable local rules and regulations.
Your Rinnai continuous ow water heater complies with NZS 5262. A declaration to this effect
can be found on the Energy Safety web site; www.energysafety.govt.nz.
To suit models:
Rinnai Innity VT16 REU-VR1620WG Rinnai Innity HD200 REU-VRM2632WC
Rinnai Innity VT20 REU-VR2024WG Rinnai Innity HDi200 REU-VR2632FFUG
Rinnai Innity VT24 REU-VR2426WG Rinnai Innity HD250 REU-VR3237WG
Rinnai Innity VT26 REU-VR2626WG Rinnai Innity EF24 REU-K2430WG
Rinnai Innity VTa26 REU-VR2626WGT Rinnai Innity EF250 REU-KM3237WD
Rinnai Innity EFi250 REU-KM3237FFUD
i = internal
a = aggressive water

Contents
WARNING
Improper installation, adjustment, alteration, service or maintenance
can cause property damage, personal injury or loss of life.
For assistance or additional information contact Rinnai on
0800 TO RINNAI (0800 86 746 624).
Before installation 3
Applicable models 3
Appliance location 4
General installation information 6
Connections and ttings 8
Dimensions - VT and HD range 9
Dimensions - EF range 10
EF250 models: Earthing the unit 11
Condensate Drain - EF models only 12
Controllers - general 14
Controllers - Universal installation 16
Controllers - Kitchen Deluxe installation 17
Controllers - Bathroom Deluxe installation 18
Controllers - communication cables 19
Commissioning 21
Recommended solar system layout 22
Dip switch settings 23

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Before installation
Unpack appliance and ue components (if applicable) and check for damage.
DO NOT install any damaged items.
Check all components have been supplied and that you have the correct gas type.
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.
For Rinnai continuous ow water heaters used in solar installations, refer
‘Recommended Solar System Layout’.
The Rinnai Innity EF models are 32 kg. Please use care when lifting and seek
assistance if required.
This appliance must be installed in accordance with:
• Current AS/NZS3000, AS/NZS3500, NZS 5261 and G12/AS1
• Rinnai installation instructions
• Local regulations and municipal building codes
Installation, service and removal must be by an authorised person only.
32 kg
Heavy
These installation instructions apply to the following Rinnai continuous ow water heaters.
Rinnai Innity VT16 External REU-VR1620WG
Rinnai Innity VT20 External REU-VR2024WG
Rinnai Innity VT24 External REU-VR2426WG
Rinnai Innity VT26 External REU-VR2626WG
Rinnai Innity VTa26 External REU-VR2626WGT
Rinnai Innity HD200 External REU-VRM2632WC
Rinnai Innity HDi200 Internal REU-VR2632FFUG
Rinnai Innity HD250 External REU-VR3237WG
Rinnai Innity EF24 External REU-K2430WG
Rinnai Innity EF250 External REU-KM3237WD
Rinnai Innity EFi250 Internal REU-KM3237FFUD
i = internal
a = aggressive water unit
Applicable models

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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.
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
• Chemicals that are corrosive in nature should not be stored or used near the water heater
• Where possible, install the water 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 brought in through them
• 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.
Internal models
Internal models are designed for indoor installations only. They may be installed
in an enclosure if the requirements of NZS 5261 are satised. An enclosure is
dened 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, specic requirements apply. Refer to NZS 5261 section 1.6 for details.
This appliance MUST be used with an approved Rinnai ueing system. The use of a non-Rinnai
ueing system may result in a dangerous situation and violates regulations.
This appliance must be located so that the ue terminal exits the building at a suitable point,
refer ‘Minimum Clearances Required for Flue Terminals’, NZS 5261:2003.
Manufacturer’s instructions for model REU-KM3237FFUD (EFi250); for reference j, gas
appliances over 200 MJ/h input, use ≥ 300 mm.

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Appliance location
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 oors specic requirements apply. Refer to NZS 5261 for
details.
This appliance must be located so that the ue terminal exits the building at a suitable point,
refer ‘Minimum Clearances Required for Flue Terminals’, NZS 5261:2003.
Manufacturer’s instructions for model REU-KM3237WD (EF250); for reference j, gas
appliances over 200 MJ/h input, use ≥ 300 mm.
When multiple units of the same model are installed on the same vertical face, with the ue
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 ow 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 ue 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
difculty for inspection, repair, renewal or operational purposes. Sufcient 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 oor level unless
the customer can arrange permanent and safe access or can provide another means of access
such as scissor or boom lifts.

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General installation information
Catch pan
It is important a suitably drained catch pan is tted (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.
Flued water heaters (internal units)
The chart below highlights the maximum ue length and number of bends. It also shows the
difference between a short and long ue—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
Short ue
setting
Long ue
setting
Maximum ue length
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 xing screws or bolts are used to secure the units to the walls, in accordance
with NZS 5261 (section 5.0). 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.

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General installation information
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 dened 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.
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
Requirements for Rinnai Continuous Flow Units Installed Without Controllers
Pipe sizing
Refer ‘Connections and Fittings’ for appliance gas consumption. If the gas pipe sizing is
insufcient the customer will not get the full performance benet. 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 specied for this gas rate. An approved
sizing chart such as the one in NZS 5261 should be used.
Water pipe sizing and layout should be performed in accordance with AS/NZS3500. All hot
water pipe work should be insulated to optimise performance and energy efciency.
When the continuous ow unit is set to deliver water at a temperature higher than 55 °C, it will
be necessary to t a Temperature Limiting Device for delivery to areas used for the purposes of
personal hygiene. Refer Department of Building and Housing G12.
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 ow, the stated minimum water supply
pressures must be supplied. The water heaters will operate at lower pressures but
will not achieve the rated ow.
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 lter or strainer should be incorporated in the
water supply to the water heater.

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Connections and ttings
Models Gas Consumption
MJ/h
Water
Supply kPa
Weight
kg
Fittings Condensate
Min. Max. Hot Cold Gas
VT16 Ext
REU-VR1620WG 125 120 1000 15 R½ (15 mm)
R½
(15 mm)
R¾
(20 mm)
VT20 Ext
REU-VR2024WG 160 160 1000 16 R¾ (20 mm)
R¾
(20 mm)
R¾
(20 mm)
VT24 Ext
REU-VR2426WG 188 180 1000 17 R¾ (20 mm)
R¾
(20 mm)
R¾
(20 mm)
VT26 Ext
REU-VR2626WG 199 180 1000 17 R¾ (20 mm)
R¾
(20 mm)
R¾
(20 mm)
VTa26
REU-VR2626WGT 199 180 1000 17 R¾ (20 mm)
R¾
(20 mm)
R¾
(20 mm)
HD200 Ext
REU-VRM2632WC 199 140 1000 21 R¾ (20 mm)
R¾
(20 mm)
R¾
(20 mm)
HDi200 Int
REU-VR2632FFUG 195 140 1000 21 R¾ (20 mm)
R¾
(20 mm)
R¾
(20 mm)
HD250 Ext
REU-VR3237WG 250 200 1000 29 R¾ (20 mm)
R¾
(20 mm)
R¾
(20 mm)
EF24 Ext
REU-K2430WG 162 240 1000 27 R¾ (20 mm)
R¾
(20 mm)
R¾
(20 mm)
R½
(15 mm)
EF250 Ext
REU-KM3237WD 211 240 1000 32 R¾ (20 mm)
R¾
(20 mm)
R¾
(20 mm)
R½
(15 mm)
EFi250 Int
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 ow isolation valve and disconnection union MUST be tted to the cold water
inlet. A non-return valve is not required unless required by local regulations.
Isolation valves must be tted so the appliance can be removed.
Purge gas and cold water supply lines to remove air and swarf before nal connection of the
appliance. Swarf in the gas or water supplies may cause damage.

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Dimensions - VT and HD range
B
D
C
M
A
E
F
J
L
H
G
I
K
Dimension (mm)
VT16 Ext (REU-VR1620WG) VT20 Ext (REU-VR2020WG) VT24 Ext (REU-VR2426WG) VT26 Ext (REU-VR2626WG) VTa26 Ext (REU-VR2626WGT) HD200 Ext (REU-VRM2632WC) HDi200 Int (REU-VR2632FFUG) HD250 Ext (REU-VR3237WG)
AWidth 350 350 350 350 350 350 350 470
BDepth 194 194 194 194 194 250 235~275 244
CHeight - Unit 530 530 530 530 530 600 600 600
DHeight - Including Brackets 571 571 571 571 571 636 641 644
EHot Water Outlet (from wall) 87 87 87 87 87 95 91~131 115
FHot Water Outlet (from centre) 105 105 105 105 105 110 110 61
GCold Water Inlet (from wall) 68 68 68 68 68 74 70~110 99
HCold Water Inlet (from centre) 10 10 10 10 10 27* 27* 52
IGas Connection (from wall) 77 77 77 77 77 103 99~139 61
JGas Connection (from centre) 83 83 83 83 83 89 89 110
KCondensate Outlet (from wall) • • • • • • • •
LCondensate Outlet (from centre) • • • • • • • •
MGas: Length Gas Connection (from base) 40 40 40 40 40 41 41 41
Cold: Length of Cold Water Inlet (from base) 50 50 50 50 50 51 51 51
Hot: Length of Hot Water Outlet (from base) 39 39 39 39 39 42 42 42
* this measurement is to the left of the centre line
HDi200, height of ue spigot from base of unit ≈ 85 mm

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Dimensions - EF range
Dimension (mm) EF24 Ext
(REU-K2430WG)
EF250 Ext
(REU-KM3237WD
EFi250 Int
(REU-KM3237FFUD)
AWidth 350 470 470
BDepth 277 283.1 257~307
CHeight - Unit 600 654 654
DHeight - Including Brackets 644 721.6 721.6
EHot Water Outlet (from wall) 164.5 100 100~150
FHot Water Outlet (from centre) 100 100 100
GCold Water Inlet (from wall) 83 64.6 64.6~114.6
HCold Water Inlet (from centre) 53* 27.2 27.7
IGas Connection (from wall) 70.5 89 89~139
JGas Connection (from centre) 25 103.2 103.2
KCondensate Outlet (from wall) 33 122.6 122.6
LCondensate Outlet (from centre) 132 195 195
MGas: 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 22.4 22.4
* this measurement is to the left of the centre line
B
D
C
M
A
E
F
J
L
H
G
I
K

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EF250 models: Earthing the unit
Removing the cover and earthing the unit
For the Rinnai condensing continuous ow 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

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Condensate drain - EF models only
The Rinnai Innity EF water heaters generate condensate continuously at a rate of up to ve
litres per hour as a by-product of a highly efcient 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 ttings MUST NOT be used as it will corrode. Instead Rinnai recommend plastic pipes and
ttings.
Important considerations for 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 those stated below.
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
Maximum length (m) 9876
Maximum changes of direction (> 45°) 3 4 5 6

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Condensate drain - EF models only
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 above.
Common stack discharge
Where individual heaters are installed in a multistorey 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 xture 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.

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Controllers - general
Water controllers are available as an optional extra. Universal (Compact), Deluxe and Wireless
Controllers can be used together. A maximum of four water controllers can be tted with the
following limitations:
• Maximum of one Kitchen Deluxe Controller (MC-100V)
• Maximum 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 section refers to wired controllers. For details on Wireless Controllers, refer to separate
instructions.
IMPORTANT
Other manufacturers’ controllers are not compatible with this appliance.
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.
A
B
C
D
Dim’ Description Universal
(MC-91)
Kitchen Deluxe
(MC-100V)
Bathroom Deluxe
(BC-100V)
ADistance between mounting holes 83 83 181
BWidth 90 128 195
CHeight 120 120 97
DDepth 20 20 22
Dimensions (mm)

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Controllers - general
Positioning
Controllers must be installed in shaded and clean locations. They should be tted 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.
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 tted with spade terminals.
Extension cabling is available as an accessory from Rinnai. Alternatively, a two core sheathed
(double insulated) ex 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 (per controller)
Three or more controllers = 20 m (per controller)
Water controller cables are not polarity sensitive.

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Controllers - Universal installation
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 the securing screws and one to provide
cable access.
3. When running cable through the access hole ensure the connector end of the cable is
located nearest to the controller (Fig.2).
4. Carefully remove the face plate from the controller using a screwdriver (Fig.3).
5. Fix the controller to the wall using appropriate ttings as shown (Fig.4).
6. Remove protective plastic from the controller face as shown (Fig.4) and replace the face
plate.
83
41.5
120
Outline of Water Control
90
Securing Screw
Ø20 Cable Access
Connector
Controller Cable
Face Plate
Face Plate
Screw
Film
Fig.1 Fig.4Fig.2 Fig.3
Optional programming of the Universal controller
Step 1 Are four controllers connected? No, refer step 2. Yes, you will need to
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 ve
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 2 1. For the controller in the kitchen only, press and hold the ‘Transfer’ and
‘On/Off’ buttons simultaneously until a beep is heard (approximately ve
seconds).
2. When the controller tted 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 replaced or swapped repeat the programming procedure.

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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 below.
3. Fix the mounting bracket to the wall using the appropriate xings.
4. Run the water controller cable through the hole in the wall.
5. Carefully remove face plate from the controller, using a screwdriver as shown below.
6. Connect the controller cable to the kitchen water controller. At this point cables from other
controllers (if tted) 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 over-
tightening of xings 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

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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. Afx the double sided self-adhesive 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 ngers 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 xings. Avoid the use of impact drills
and over-tightening of xings 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
Connector
Controller Cable
Backing Seal
Remove
to expose
self-adhesive
Fig.1
Fig.4
Fig.2
Fig.3

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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 tted 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)
ex 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.
CAUTION
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 sufcient 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.
B
C
E
D
Cable connector for VT26, VTa26, VT24, VT20, and VT16
B
C
D
E
Cable connector for HD250, HD200, HDi200, and EF models

Rinnai New Zealand Ltd. Continuous Flow Water Heater Installation Manual:
03-11
20
Controllers - communication cables
Connecting three to four controllers
1. Repeat steps 1-3 on previous page.
2. To connect three to four controllers, separate all the cables to be tted into pairs. Cut off
the existing spade connectors from each pair and re-terminate each pair into a new spade
connector (F) (available from your local electrical supplier) so there are only two sets of
spade connectors. Four spade connectors in total to be terminated.
3. Repeat steps 4 and 5 on previous page.
Three
Cables
Four
Cables
F F F
Spade connectors are available from your local electrical supplier.