Hitachi RHUE-3AVHN1 Installation and operating manual

V1 – 2/15
Model Numbers
RHUE-3AVHN1
RHUE-(3-6)A(V)HN-HM
Hitachi Air Conditioning Europe SAS
UK Branch.
Whi ebrook Park, Lower Cookham Road, Maidenhead, Berkshire SL6 8YA
Hi achi Yu aki Hea pump
Ins alla ion reference manual

Page 2 of 61
General
This manual is provided by Hi achi Air Condi ioning Europe (HACE) for reference use by qualified
ins allers of he Yu aki range of hea pumps. Qualified ins allers will have a ended he Hi achi
recognised raining course before ins alling any Hi achi produc . Non a endance of such a course in a
recognised Hi achi raining cen re may void he warran y on any produc s supplied.
This manual does no replace he service manual which is referred o wi hin hese pages. This manual
provides guidance only as o he key elemen s of he design and ins alla ion of hea pumps and hea ing
sys em design (docking op ions) referred o on he fron cover of his manual.
This manual refers o he Yu aki M series hea pump service manual SMGB0090 rev.0 – 01/2014
No par of his publica ion may be reproduced, copied, filed or ransmi ed in any shape or form wi hou
he express permission of HACE.
All regula ions for wa er usage, energy efficiency, elec rical safe y and o hers as applicable o he
ins alla ion in force a he ime of he ins alla ion mus be adhered o and all such regula ions shall ake
precedence over any advice and inference given herein.

Page 3 of 61
Contents Page
Quick S ar .................................................................................................. 4
Configura ion selec ion guide ....................................................................... 5
In roduc ion ................................................................................................... 6
Lis of Accessories ...................................................................................... 8
Key ins alla ion considera ions ......................................................................... 11
Transpor a ion of hea pump ......................................................................... 13
Hea Pump hydraulic ins alla ion considera ions ........................................... 16
Advanced Sys em Con roller pack ............................................................ 18
Elec rical ins alla ion ...................................................................................... 19
Hea ing sys em hydraulics ......................................................................... 25
Hea ing circui examples ......................................................................... 26
Configura ion H ..................................................................................... 30
Configura ion 1.0 ...................................................................................... 32
Configura ion 1.2 ...................................................................................... 34
Configura ion 2.0 ...................................................................................... 38
Configura ion 2.1 ...................................................................................... 42
Configura ion 2.2 ...................................................................................... 46
Configura ion 3.1 ...................................................................................... 48
Configura ion 3.2 ...................................................................................... 50
Configura ion 4.1 ...................................................................................... 52
Commissioning procedure ......................................................................... 55
Commissioning cer ifica e ......................................................................... 58
Service record ................................................................................................... 60

Page of 61
Quick Start
1. Selec which ype of sys em you wish o ins all. See flowchar overleaf.
2. De ermine where he various sys em componen s should be ins alled.
3. Moun he sys em componen s.
4. Connec he sensors, RF receiver, Hea pump and o her sys em componen s o he sys ems
con roller according o your selec ed sys em configura ion.
5. Power up he sys em con roller and perform a fac ory rese by pressing he RESET bu on, selec
language and hydraulic configura ion.
6. Se he da e, ime and essen ial sys em parame ers according o he selec ed sys em
configura ion.
7. Se he DHW program if required.
8. Ensure room uni is communica ing wi h he sys em con roller. If no , perform binding
procedure.
9. Se ime/ empera ure profile in accordance wi h cus omer’s wishes.
10. Review all parame er se ings according he chosen sys em configura ion.
11. Tes he sys em
12. Comple e commissioning documen a ion and show end user how o opera e he room uni .
13. Leave all li era ure wi h he cus omer.
14. Re urn Commissioning cer ifica e o Hi achi in order o ac iva e warran y.
Important Considerations
Pre-Installation
Iden ify sui able space for Hea Pump, Domes ic Ho Wa er (DHW) cylinder and hea ing buffer ank.
Consider loca ion of key plumbing componen s bearing in mind requiremen for main enance access.
Availabili y of sui able wa er supply.
Availabili y of sui able elec rici y supply, N.B. many supply distribution authorities require notice prior to
connection heat pumps.
Installation
As Quick s ar above
Post-Installation
Thorough explana ion of sys em and hea ing con rols o cus omer a handover.
Regis ra ion for Renewable Hea Incen ive (RHI) or o her benefi s ha may be eligible if applicable.
Regis ra ion of sys em wi h he Micro-genera ion Cer ifica ion Scheme (MCS).
Servicing
Recommend annual servicing o check for debris in s rainer and ensure hea pump airways are clear.
Replace ba eries in room uni .
Always check sys em parame ers have no been al ered and check alarm his ory for anomalies.

Page 5 of 61

Page 6 of 61
Introduction
Where correc ly ins alled and main ained he Yu aki hea pump will provide adequa e hea ing and ho
wa er all year round. I is impor an ha he correc sys em configura ion (docking op ion) has been
chosen by he sys em designer o ensure ha comfor is main ained for he cus omer under ypical
ou door empera ures and ho wa er usage condi ions relevan o he geographical area and household
demands.
The performance of Micro-genera ion hea pump sys ems is impossible o predic wi h cer ain y due o
he variabili y of he clima e and i s subsequen effec on bo h hea supply and demand. HACE
endeavors o provide he bes available informa ion a all imes bu is given as guidance only and should
no be considered as a guaran ee.
The sys em designs ou lined in his manual include provision for hea ing only (Configura ion H), hea ing
and ho wa er genera ion using he Hea Pump alone (Configura ion 1.0 and 1.2), he Hea Pump wi h
elec ric backup (Configura ion 2.0, 2.1 and 2.2) and he Hea Pump wi h boiler backup (configura ion
3.2 and 4.1). There is also an op ion o include Domes ic Ho wa er only from he boiler and hea ing
from hea pump wi h boiler suppor (configura ion 3.1).
The defros cycle uses hea from wa er in he hea ing sys em. The designs ou lined assume ha here
will be sufficien sys em wa er volume and flow available a all imes for he Hea Pump o defros . The
defros cycle will normally ake wa er from he buffer ank bu where his is no sufficien or no buffer
ank is fi ed, here mus be sufficien wa er volume wi h no res ric ions of he hea ing wa er flow by
closed zone valves, underfloor hea ing ac ua ors or hermos a ic radia or valves.
If in doub , please con ac HACE Technical Suppor for fur her advice.
The able shown below provides heore ical informa ion abou he available volume of sys em wa er for
defros ing and he reduc ion of empera ure of he sys em wa er during he defros opera ion.
Model
Water tempera-
ture drop
RHUE-3AVHN1 RHUE-3A(V)HN1-HM RHUE- AVHN1-HM RHUE-5A(V)HN1-HM RHUE-6A(V)HN1-HM
5°C
232
212
276
342
410
10
°C
118
106
138
171
205
1
5°C
77
71
92
114
137
20°C
58
53
69
86
103
2
5°C
46
42
55
68
82
Note: The values shown above are based on theoretical installation conditions. Values can vary for different
hydraulic circuit configurations. Installers should recalculate these values for the real conditions of their installation.

Page 7 of 61
Domes ic Ho Wa er (DHW) is normally main ained a around 50°C in he ho wa er cylinder hus
preven ing he grow h of harmful bac eria even in normal use. However, pro ec ion agains he grow h
of legionella bac eria is provided by periodically raising he wa er empera ure in he DHW cylinder.
The hea pump provides a variable power ou pu depending on he hea ing and ho wa er load. The
power ou pu varia ion is achieved by a varia ion of speed of he compressor and fan sys ems wi hin he
hea pump. The con rol of he hea pump power is main ained a op imum efficiency and effec iveness
by he Advanced Sys em Con roller (ASC). Hea ing and ho wa er load is de ermined au oma ically by
he use of sensors which moni or he ou side air empera ure, indoor empera ure and wa er sys em
empera ures.
Full hea loss calcula ions in accordance wi h BS EN 12831 mus be carried ou by he sys em designer in
order o accura ely de ermine he size of he required Hea Pump.
A he ime of wri ing, planning permission is no generally required for air source hea pumps in he
Uni ed Kingdom. However, planning considera ions and calcula ions mus be carried ou in accordance
wi h MCS 020 which can be found on he following web si e:
h p://www.microgenera ioncer ifica ion.org/mcs-s andards/ins aller-s andards
No e: The Yu aki hea pump has been approved under he Micro-genera ion Cer ifica ion Scheme
(MCS). The ins aller of he equipmen mus also be accredi ed under MCS for he appropria e
echnology and he ins alla ion mus mee he requiremen s of MCS in order o be eligible for any
benefi under he Renewable Hea Incen ive (RHI) scheme.
Elec rici y supply au hori ies may need o be informed prior o ins alla ion of curren using equipmen .
Always check wi h your local dis ribu ion company before planning he ins alla ion.

Page 8 of 61
List of Accessories
The following accessories are available from Hi achi in order o assis he ins aller in mee ing design
requiremen s. Ins allers may choose o source heir own par s a heir discre ion. In order o ensure
equipmen warran ies are preserved i is impor an ha ins allers sa isfy hemselves ha such par s will
allow he sys em perform wi hin specified parame ers.
Accessory
Drawing symbol
Notes
Wilo ERP
Approved buffer
loading pump
Addi ional
accessories are
required in order o
fi he his pump
inside he Hea Pump
casing as hydraulic
fi ings wi hin he
hea pump are
differen from
s andard UK
plumbing sizes.
Pump adap or ki
n/a
An i
-
vibra ion
fee
Mus be
securely
anchored o he hea
pump and o he
ground.
Hea Pump
compa ible
DHW Cylinders
wi h G3 ki
Avai
l
able as
180L,
210L, 250L (solar
op ion), 300L (solar
op ion)

Page 9 of 61
4 Por Buffer
ank
Available as
50L,
95L,
150L,
210L
Flexible hose ki
Con ains 2 x hoses
wi h 1” BSP M hread
and fibre washers.
Full bore
isola ion valve
Full bore
isola ion valve
wi h s rainer
3 Way Valve
1 x 3 por zone valve

Page 10 of 61
Hydraulic
separa or
Only o be used in
sys ems wi h
sufficien open flow
wa er volume o
mee he
requiremen s of he
Hea Pump.
Elec ric Wa er
-
Hea er
Mus be fi ed in
accordance wi h
Hi achi
recommenda ions
for pump and bypass
as required.
2nd empera ure
ki
Con ains Mixer valve
and sensor o enable
con rol of a low
empera ure hea ing
circui
Advanced
Sys em
Con roller Pack
Refer o Advanced
Sys em Con rol
Reference Manual