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
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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