Rinnai INFINITY N56kWi User manual

INFINITY N56kWi internal water heater
Polypropylene (PP) common flue installation guide

Important
Rinnai INFINITY N56kWi internal gas hot water heater ueing shall be
installed in accordance with:
-Manufacturer’s installation instructions
-Current AS/NZS 3000, AS/NZS 3500, AS/NZS 5601.1 and G12/AS1
The ueing components outlined in this guide are suitable for the
N56kWi model only.
For use with Natural Gas or Universal LPG as indicated on the
appliance.
Appliance must be installed, commissioned and serviced by an
authorised person, being in New Zealand a licensed gastter.
Warning
Improper installation, adjustment, alteration, service and 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: [email protected]
Web: rinnai.co.nz
youtube.com/rinnainz
facebook.com/rinnainz

Contents
Flueing options .....................................................4
Flueing guidelines.................................................6
Spacing the water heaters ....................................7
Condensate ..........................................................7
Installation guidelines ...........................................8
Terminations .........................................................10
Air requirements for gas appliances .....................11
Flue selection .......................................................13
Room air ueing ...................................................14
Outside air ueing.................................................15
Vertical termination kits.........................................16
Horizontal termination kits ....................................17
Component dimensions ........................................18
The ue components outlined in this guide are suitable for up to seven N56kWi
water heaters, these ue components are stocked ex-Auckland. For applications
using more than seven water heaters, contact Rinnai Commercial for specication
assistance. These ue components would need to be specially ordered and have
a 16 week lead time.
To ensure accurate ueing dimensions, before cutting any components, it is a
good idea to remove the seals and connect the system to double-check everything ts.
Important

4 | Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20
Flueing options
IMPORTANT
Single skin polypropylene common ueing (zero clearance) is designed for use with Rinnai
INFINITY N56kWi internal model only. It is not suitable for use with any other Rinnai INFINITY
models.
For all applications the ue must pitch back to the water heater at a constant 3° pitch (54 mm per
metre) to drain condensate.
Rinnai header components are cut (and only suitable) for water heaters mounted on 521 mm
centres, and if back-to-back, 159 mm spacing. N56kWi ueing is available with the header
congurations shown below.
521 mm 521 mm
159 mm
Exhaust Exhaust
Exhaust
Air intake
Exhaust
Air intake
Unit spacing required
Room air header congurations
Multiple water heaters using room air for combustion while sharing an
exhaust header that vents directly outside. A room air adapter is tted
(as pictured) to the top of each water heater.
Outside air header congurations
Multiple water heaters share a combustion air header and a separate exhaust header that vents
directly through separate penetrations to the outside.
Room air inline header Room air back-to-back header
Outside air inline header Outside air back-to-back header

Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20 | 5
Room air back-to-back ueing example
1 2 2 2 34
5
6
1. CFKRS110: Room air starter kit Ø110 mm
2. CFKRCB110: Room air back-to-back connection kit
Ø110 mm
3. Ø110-160 mm adapter
Part of the vertical termination kit
4. CF790087: 90° bend Ø160 mm
5. CF790089: Flue pipe 1m Ø160 mm
6. CFKRVT160: Room air Ø160 mm vertical termination
kit
Includes a UV stainless steel sleeve and an exhaust
rain cap (not shown).
Outside air back-to-back ueing example
1
222
3
3
4
4
4
5
4
5
5
5
6
6
5
5
1. CFKOS110: Outside air starter kit Ø110 mm
2. CFKOCB110: Outside air back-to-back connection kit
Ø110 mm
3. Ø110-160 mm adapter
Part of the horizontal termination kit
4. CF790087: 90° bend Ø160 mm
5. CF790089: Flue pipe 1m Ø160 mm
6. CFKOWT160: Outside air long horizontal termination
kit Ø160 mm

6 | Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20
Flueing guidelines
UV protection
Where appropriate, all components must be protected from UV. The horizontal terminals are UV
resistant. The vertical terminals are supplied with a stainless outer for UV protection. Anything else
exposed to UV should be painted with a system suitable for polypropylene.
Combustion air provided to the system should not be taken from any area that may produce a
negative pressure (i.e exhaust fans, powered ventilation fans etc.). Room combustion air requires
compliant louvres in a plant room door or wall, refer AS/NZS 5601.1:2013 for more information.
For appliance and user safety NEVER use Rinnai ue components with other manufacturer’s water
heaters.
Maximum ue length
Not in this manual,
contact Rinnai
Stocked ex-Auckland Indent order: 16 weeks
Header size Header size
Ø110 mm header
Ø110 mm ue
Ø110 mm header
Ø160 mm ue
Ø160 mm header
Ø160 mm ue
Horiz. termination ONLY Horiz. and vertical termination Horiz. and vertical termination
Please note: For every 90° bend used, subtract 3 m from the lengths below
Number of
water heaters Maximum ue length
245 m 45 m
345 m 45 m
420 m 45 m
545 m
645 m
721 m 45 m
845 m
927 m
10 27 m
11 12 m
12 12 m
Header Flue length
Main ue pipe into which other ue components connect
The maximum ue length starts at the end of the header
system.
Distance from the end of the header to the ue termination

Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20 | 7
Spacing the water heaters
If you are not using a Rinnai pre-assembled skid system it’s important to note that the Rinnai
header ue components are cut (and only suitable) for water heaters mounted on 521 mm centres,
and if back-to-back, 159 mm spacing (refer image on p.4).
Install the ueing according to conguration outlined below. Do not locate the common header
remotely from the water heaters. Room air congurations follow the same instructions excluding
the information regarding the air intake.
The installation areas should be measured to make sure that adequate space is available to install
the water heaters and the ue system.
Back-to-back conguration example
Exhaust
Air intake
Air break
300 mm
xx mm
Min. length 125 mm
xx mm +
25 mm
xx mm +
50 mm
xx mm +
75 mm
z mm
z mm +
25 mm
z mm +
50 mm
z mm +
75 mm
To sanitary
sewer
C
on
densate
521 mm 521 mm
Condensate
This information should be used in conjunction with the condensate section within the ‘N-Series
installation guide’. Install the condensate trap and drain pipe.
The starter kit (end cap) collects condensate—a condensate trap is supplied with each starter kit.
The condensate trap has an integrated valve that temporarily blocks condensate if high (wind)
pressures cause a pressure rise in the system. The integrated valve will also prevent the trap
from drying out if the system is o󰀨 for a long period of time. The condensate trap does not require
priming.
Condensate must be drained to prevent malfunction, diagnostic code failures, or property damage.

8 | Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20
Installation guidelines
Rinnai’s common ue components are designed to t the
N56kWi water heaters that are mounted securely and spaced
521 mm apart (centre to centre).
Exhaust ueing is designed for a 3° rise (54 mm per metre) back to the
water heater to drain condensate—this MUST BE done.
IMPORTANT
Install water heater adapters
Install the appliance adapters on top of the water heater with a self tapping screw.
Calculate extension pipe sizes
As noted above, exhaust venting is designed for a 3° rise (54 mm per metre). When the water
heaters are spaced 521 mm (centre to centre), the height increase is approx. 25 mm per water
heater. A 500 mm extension section is included with each connection kit, this MUST BE cut to
length to account for the rise from unit to unit, refer shaded pipe —sections on previous page.
# of units Pipe length
1 125 mm
2 150 mm
3 175 mm
4 200 mm
5225 mm
6250 mm
7 275 mm
8 300 mm
Install bends
Install the bends to the extension section. Do not cut or modify the bend.
Header connection
Install the header components as shown below. For outside air ueing, connect the combustion
air opening of the appliance adapter to one end of the ex connector, and the other end of the ex
connector to the combustion air header.
3°
54 mm per metre
Length =
Room air Outside air
Important
To get the header pitch, each extension pipe needs to be 25 mm longer
than the previous pipe. The minimum length for the extension pipe is
125 mm.
Self tapping screw
Self tapping screw
Appliance adapter
Flex connector
Single branch
connection

Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20 | 9
Joining, disconnecting, and cutting
For measuring, the seals can be temporarily removed.
Lubricate the seals and male ends of the components with Centrocerin lubricant or water, and
assemble the components using light rotational movements. Fully insert the male end into the
female end. Immediately inspect the seal to make sure it is in the correct position.
The pipes are always shortened on the male end. After
cutting (cut straight), always deburr and bevel the end so the
sealing gaskets are not damaged. Never cut or modify formed
components such as elbows or collectors.
Seal direction and assembly of seals
Seals are pre-assembled in the ue components. If a seal is
damaged it should not be used. Use only original seals. NEVER
use fabricated or non-Rinnai ue seals or parts.
• The seal must remain clean and free from foreign debris
before assembly.
• Always conrm the seal is installed in the right direction.
Flue supports
• Support horizontal ue runs a minimum of every 1.2 m
• Support vertical ue runs a minimum of every 1.8 m
Flue supports are not provided with any of the kits—they must be ordered separately, refer p.16 for
part numbers.
F
l
u
edi
re
c
t
io
n
Lubricant
The seals and male ends of all common ue components must be lubricated before
assembly. Only use the Centrocerin lubricant provided with each starter kit, or water. One
tube of Centrocerin is enough for approximately 30 m of ue. Centrocerin is a water soluble
lubricant designed to ease assembly of ue components. Other lubricants are not suitable
as they will damage the ue.
Centrocerin lubricant is provided, but can also be purchased separately—part CF790025.
Flue direction
The female end of the ue must always point in the direction of the termination. This is critical to
ensure proper condensate ow and to maintain the integrity of the seals.

10 | Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20
Horizontal terminations
Horizontal terminations must also comply with shown in AS/NZS 5601.1.
For outside air horizontal terminations there needs to be a 305 mm minimum clearance, from edge
of exhaust termination to edge of combustion air termination.
Please note
During colder weather when the exhaust temperature is much hotter than the outside air, the
exhaust fumes will condense, producing water vapour. As a result a plume of water vapour may be
seen leaving the exhaust.
Exhaust
Intake
Minimum 305 mm clearance between terminals
Vertical terminations
To ensure products of combustion are cleared, adequate clearance from the building is required.
The vertical cowl should have a 500 mm clearance from any part of the building. This also applies
to steep and pitched roofs, where the ue cowl should be 500 mm clear of the ridge line. An
adequate ow of fresh air must exist around the ue cowl following installation.
Minimum clearances are shown in AS/NZS 5601.1.
For outside air vertical terminations there also needs to be a 305 mm minimum clearance, inside
edge to inside edge, between the intake and exhaust terminals.
305 mm minimum inside
edge to inside edge
Intake
Exhaust
Terminations

Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20 | 11
Air requirements for gas appliances
This system requires adequate combustion air for ventilation
and dilution of ue gases. Failure to provide adequate
combustion air can result in an unsafe situation.
As detailed in AS/NZS 5601.1 p.100-101, two permanent ventilation
openings, with calculated ventilation areas, shall be provided. The
openings can be combined provided it complies with AS/NZS 5601.1
6.4.5 ‘Location of ventilation openings’.
Appliances using room air for combustion
To calculate the air requirements for N56kWi installations you must reference AS/NZS 5601.1 6.4.4
‘Air requirements for gas appliances’. For ease of reference we have provided the total MJ/h input
rating in the table below, to assist with this calculation.
WARNING
Air for N56kWi installations only (in addition to other appliances)
PLANT ROOM
Number of N56kWi units 2 3 4 5 6 7
Factor direct to outside 150 150 150 150 150 150
Max. MJ/h input rate 418 627 836 1045 1254 1463
Ventilation required in mm2 (x 2) 62700 94050 125400 156750 188100 219450
Factor via an adjacent room 300 300 300 300 300 300
Max. MJ/h input rate 418 627 836 1045 1254 1463
Ventilation required in mm2 (x2) 125400 188100 250800 313500 376200 438900
NON-PLANT ROOM
Number of N56kWi units 2 3 4 5 6 7
Factor direct to outside 300 300 300 300 300 300
Max. MJ/h input rate 418 627 836 1045 1254 1463
Ventilation required in mm2 (x2) 125400 188100 250800 313500 376200 438900
Factor via an adjacent room 600 600 600 600 600 600
Max. MJ/h input rate 418 627 836 1045 1254 1463
Ventilation required in mm2 (x2) 250800 376200 501600 627000 752400 877800
General requirements for combustion air
Combustion air must be free of corrosive chemicals. Do not provide combustion air from corrosive
environments. System failure due to corrosive air is not covered by warranty.
Combustion air must be free from acid forming chemicals such as sulphur and chlorine. These
chemicals have been found to cause rapid damage and decay, and become toxic when used
as combustion air in gas appliances. Such chemicals can be found in, but not limited to, bleach,
ammonia, aerosol sprays, cleaning solvents, varnish, paint, and air fresheners. Do not store these
or similar products in the vicinity of the water heaters.

INFINITY N56kWi internal water heater
Flue kits and components
Flue selection
1. Refer table on next page
2a. Select appropriate starter kit
2b. Select appropriate header connection kit(s)
3. Select appropriate termination kit
4. Select respective ue pipes and bends
(double quantities for outside air)

Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20 | 13
Flue selection
2a. Starter kits, one starter kit is required for each application
Kit Part number Contains
Room air starter kit CFKRS110 • Room air vent
• Condensate trap and 1.2 m rubber hose
• Centrocerin lubricant
Outside air starter kit CFKOS110 • Room air vent
• End cap
• Condensate trap and 1.2 m rubber hose
• Centrocerin lubricant
2b. Header connection kits, inline—one kit for each water heater, back-to-back—one kit for every two water
heaters
Room air inline connection
kit
CFKRCS110 • Collector Ø110 mm 1-branch
• Bend 90°
• Extension 500 mm
• Room air adapter
Room air back-to-back
connection kit
CFKRCB110 • Collector Ø110 mm 2-branch
• Bend 90° (x2)
• Extension 500 mm (x2)
• Room air adapter (x2)
Outside air inline connection
kit
CFKOCS110 • Collector Ø110 mm 1-branch (x2)
• Bend 90°
• Extension 500 mm
• Outside air adapter and rubber ex
Outside air back-to-back
connection kit
CFKOCB110 • Collector Ø110 mm 2-branch (x2)
• Bend 90° (x2)
• Extension 500 mm (x2)
• Outside air adapter and rubber ex (x2)
3. Horizontal termination kits
Room air Ø110 mm
horizontal termination kit
CFKRWT110 • Wall terminal kit Ø110 mm
Outside air Ø110 mm
horizontal termination kit
CFKOWT110 • Wall terminal kit Ø110 mm (x2)
Room air Ø160 mm
horizontal termination kit
CFKRWT160 • Wall terminal kit Ø160 mm
• Ø110-160 mm adapter
Outside air Ø160 mm
horizontal termination kit
CFKOWT160 • Wall terminal kit Ø160 mm (x2)
• Ø110-160 mm adapter (x2)
3. Vertical termination kits
Room air Ø160 mm vertical
termination kit
CFKRVT160 • Vertical terminal
• Stainless UV sleeve
• Exhaust rain cap
• Ø110-160 mm adapter
Outside air Ø160 mm
vertical termination kit
CFKOVT160 • Vertical terminal (x2)
• Stainless UV sleeve (x2)
• Exhaust rain cap
• Intake rain cap
• Ø110-160 mm adapter (x2)

14 | Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20
Room air ueing
N56kWi common header (diam. 110 mm) room air inline ueing
Flueing system must start with a starter kit (one per system), and a connection kit (one for each water heater). These are
detailed below.
CFKRCS110: Room air inline connection kit contains:
1. Collector Ø110 mm 1-branch
2. Bend 90°
3. Extension 500 mm
4. Room air adapter
CFKRS110: Room air starter kit contains:
1. Room air vent
2. Condensate trap and 1.2 m rubber hose
3. Centrocerin lubricant
N56kWi common header (diam. 110 mm) room air back-to-back ueing
Flueing system must start with a starter kit (one per system), and a connection kit (one per two water heaters). These are
detailed below.
1
2
2
33
4
4
2
3
1
2
3
4
1
1
23
CFKRS110: Room air starter kit contains:
1. Room air vent
2. Condensate trap and 1.2 m rubber hose
3. Centrocerin lubricant
CFKRCB110: Room air back-to-back connection kit
contains:
1. Collector Ø110 mm 2-branches
2. Bend 90° x 2
3. Extension 500 mm x 2
4. Room air adapter x 2

Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20 | 15
Outside air ueing
N56kWi common header (diam. 110 mm) outside air inline ueing
Flueing system must start with a starter kit (one per system), and a connection kit (one for each water heater). These are
detailed below.
CFKOS110: Outside air starter kit contains:
1. Room air vent
2. End cap
3. Condensate trap and 1.2 m rubber hose
4. Centrocerin lubricant
1
12
3
4
N56kWi common header (diam. 110 mm) outside air back-to-back ueing
Flueing system must start with a starter kit (one per system), and a connection kit (one per two water heaters). These are
detailed below.
CFKOS110: Outside air starter kit
contains:
1. Room air vent
2. End cap
3. Condensate trap and 1.2 m rubber hose
4. Centrocerin lubricant
1
1
2
2
33
4
4
5
1
2
3
4
CFKOCS110: Outside air inline connection kit contains:
1. Collector Ø110 mm 1-branch x 2
2. Bend 90°
3. Extension 500 mm
4. Combustion air adapter and flex
1
2
3
4
CFKOCB110: outside air back-to-back 110 connection
kit contains:
1. Collector Ø110 mm 2-branches x 2
2. Bend 90° x 2
3. Extension 500 mm x 2
4. Combustion air adapter and flex x 2

16 | Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20
Vertical termination kits
CFKRVT160: N56kWi 160 mm room air vertical termination kit
Kit contains:
• Vertical terminal
• Stainless UV sleeve
• Ø110-160 mm adapter
• Exhaust rain cap
CFKOVT160: N56kWi 160 mm outside air vertical termination kit
Kit contains:
• Vertical terminal x2
• Stainless UV sleeve x2
• Ø110-160 mm adapter x2
• Exhaust rain cap x1
• Intake rain cap x1
Refer note on p.9, ue supports need to be ordered separately.
• Flue support/bracket Ø110 mm part number: CF790091
• Flue support/bracket Ø160 mm part number: CF790092
Flue support part numbers

Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20 | 17
CFKRWT110: N56kWi 110 mm room air horizontal termination kit (four or less water heaters)
Kit contains:
• Horizontal termination 110 mm
CFKRWT160: N56kWi 160 mm room air horizontal termination kit (ve plus water heaters)
Kit contains:
• Horizontal termination 110 mm x2
Kit contains:
• Horizontal termination 160 mm
• Ø110-160 mm adapter No image available
CFKOWT110: N56kWi 110 mm outside air horizontal termination kit (four or less water heaters)
CFKOWT160: N56kWi 160 mm outside air horizontal termination kit (ve plus water heaters)
Kit contains:
• Horizontal termination 160 mm x2
• Ø110-160 mm adapter x2
Horizontal termination kits

18 | Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20
Component dimensions
Condensate trap
All starter kits will have the condensate
trap as part of the kit. Comes with 1.2 m
rubber hose (not pictured).
Dimensions:
• Overall length 101 mm
• Width 101 mm
• Height 187 mm
Starter kit Ø110 mm
Common to the room air and outside
air starter kits and connects to the
condensate trap.
Dimensions:
• Overall length 175.6 mm
• Diameter 110 mm
• Height 249 mm
• Connected length 180 mm
Collector Ø110 mm 1-branch
Part of the inline connection kits.
Dimensions:
• Overall length 586 mm
• Diameter 110 mm
• Height 274 mm
• Connected length 520 mm
Collector Ø110 mm 2-branch
Part of the back-to-back connection kits.
Dimensions:
• Overall length 586 mm
• Diameter 110 mm
• Height 451 mm
• Connected length 520 mm
Bend 90°Ø80 mm
The 90° bend component is part of all
the connection kits
Dimensions:
• Overall length 174 mm
• Diameter 80 mm
• Height 183 mm
• Connected length N/A
Extension 500 mm
Part of every connection kit. Each section
requires cutting to achieve fall back
to the condensate trap.
Dimensions:
• Overall length 500 mm
• Diameter 80 mm
• Height 125 mm
• Connected length 440 mm
Room air adapter
For room air installations, one adapter
needed for each water heater.
Dimensions:
• Overall length 130 mm
• Diameter 125 mm
• Height 125 mm
• Connected length 80 mm
Outside air adapter
For outside air installations, one
adapter needed for each water
heater. Comes with ex component.
Dimensions:
• Overall length 181 mm
• Diameter 125 mm
• Height 181 mm
• Connected length 131 mm
Wall terminal kit Ø110 mm
Horizontal wall terminal kit for
installations with four or less
water heaters
Dimensions:
• Overall length 640 mm
• Width 205 mm
• Height 205 mm
• Connected length 500 mm
Wall terminal kit Ø160 mm
Horizontal wall terminal kit for
installations with ve or more
water heaters
Dimensions:
• Overall length 640 mm
• Width 205 mm
• Height 205 mm
• Connected length 500 mm

Rinnai INFINITY N56kWi common ue installation guide 13088-B 04-20 | 19
Vertical terminal Ø160 mm
Termination for all vertical installations.
Dimensions:
• Overall length 281 mm
• Width 281 mm
• Height 1100 mm
• Connected length 1100 mm
Stainless steel UV sleeve
Part of vertical terminal kit, required to protect
black plastic outer of terminal.
Dimensions:
• Overall length 1070 mm
• Diameter 200 mm
Exhaust rain cap Ø160 mm
Metal cap that ts over the vertical
terminal to stop excessive water from
entering ue.
Dimensions:
• Overall length 281 mm
• Width 520 mm
• Height 520 mm
Intake rain cap Ø160 mm
Plastic helmet cap that sits over the
intake vertical terminal to stop excessive
water from entering the ue.
Dimensions:
• Overall length 195 mm
• Width 535 mm
• Height 535 mm
Flue pipe adapter Ø110-160 mm
Horizontal or vertical ue connection
adapter for connecting 110 mm diameter
to 160 mm diameter ue sections.
Dimensions:
• Overall length 186 mm
• Diameter 110-160 mm
• Height 186 mm
• Connected length 136 mm
Flue pipe Ø110 mm (part CF790028)
110 mm diameter straight ue
pipe sections.
Dimensions:
• Overall length 1000 mm
• Diameter 110 mm
• Height 110 mm
• Connected length 945 mm
Flue pipe Ø160 mm (part CF790089)
110 mm diameter straight ue
pipe sections.
Dimensions:
• Overall length 1000 mm
• Diameter 160 mm
• Height 160 mm
• Connected length 945 mm
45°bends Ø110 mm (part CF790026)
Sold as a pair. 110 mm diameter
bends for changing direction of ue.
Dimensions:
• Overall length 159 mm
• Diameter 110 mm
• Height 189 mm
45°bends Ø160 mm (part CF790086)
Bends for changing direction of ue.
Sold as a pair.
Dimensions:
• Overall length 220 mm
• Diameter 160 mm
• Height 249 mm
90°bend Ø160 mm (part CF790087)
Bend for connections and changing
direction of ue.
Dimensions:
• Overall length 244 mm
• Diameter 160 mm
• Height 153 mm

INFINITY N56kWi common flue installation guide 13088-B 04-20
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