Fast RHE Series Technical manual

0313-6180505-07
SELECTION, USE, INSTALLATION AND
MAINTENANCE MANUAL
HEAT RECOVERY UNITS WITH COOLING CIRCUIT
RHE Series
GB
FAST S.p.A.
ISO 9001:2000 - Cert.n° 0882/4

Index
English
General norms 4
Unit description 5
Components decription 6
Accessories 7
Technical data 8
Operating limits 10
Sound data 10
Cooling performance variation 11
Fresh air temperature variations on the change of the external
air temperature 12
Heating efficiencies, pressure drops on air side, accessories MBCH, MSS 13
Cooling scheme summer operation 14
Cooling scheme winter operation 15
Dimensions 16
Accessories dimensions 19
Accessories assembly instructions 21
Instructions for assembling roofs for outside installation 21
Installation and use of the unit 23
Positioning of the supporting brackets 24
Ducts connection 25
Hydraulic connections, condensate drain discharge 25
FCH Free-cooling accessory 26
Electrical connections 27
Changing SET fans flow rate 27
Maintenance of the unit 30
Filters 30
Condensate drain pan 30
Recuperator 31
Fans motor assembly 31
Heat exchange coil 31
Decommissioning 31
Disposal 31
Diagnosis and fault solving 32

High efficiency heat recovery unit with cooling circuit - RHE -
4
Selection, installation, use and maintenance manual
GB
General norms
The present manual is an integral part
of the documentation enclosed with the
machine.
It must be conserved for future reference
and must accompany the machine throu-
ghout its working life.
The manual defines the purpose to which
the machine was built and establishes the
correct installation and use limits.
• All use, installation and maintenance
instructions of the unit are described
in this manual as well as the main
accident prevention standards.
• Read carefully and fully all informa-
tion contained in this manual before
the installation, starting, use, main-
tenance and cleaning of the unit.
Pay particular attention to the use
regulations that are accompanied by
“DANGER” or “WARNING”, because if
not observed, they could cause dama-
ge to the machine and/or persons and
property.
• For irregularities not contemplated
by this manual, please consult the
local After Sales Service.
• FAST S.p.A. decline any responsibility
for any damage due to the improper
use of the machine, and to a partial or
superficial reading of the information
contained in this manual.
• Installation and maintenance must be
carried out by trained and qualified
personnel, having the requirements
laid down by law 46/90 and/or DPR
380/2001 for electric/electronic and
air conditioning installations, with
consequent registration at the local
CHAMBER of COMMERCE. Otherwise
FAST S.p.A. decline all responsibility
regarding the safety of the product.
THE MANUFACTURER DECLINES ANY
RESPONSIBILITY FOR DAMAGE TO
PROPERTY, PERSONS OR ANIMALS
CAUSED BY THE NON OBSERVANCE OF
THE INDICATIONS AND REGULATIONS
CONTAINED IN THE PRESENT MANUAL.
Even though a suitable risk analysis was
carried out during the design of the HRR
unit, pay ATTENTION to the pictograms on
the machine that make the reading of the
manual easier catching the readers atten-
tion concerning risks that can’t be avoided
or sufficiently limited with the adoption
of protection means and measures.
GENERAL DANGER SIGNS
Carefully observe all indications
at the side of the pictogram.
The non observance of the indications
could cause hazardous conditions with
possible injury to the operator and to the
user in general.
VOLTAGE DANGER SIGN
Carefully observe all indications
at the side of the pictogram.
The signs indicate components on the unit
or, in the present manual, identify areas
that could generat risks of an electrical
nature.
GENERAL WARNING SIGNS
Carefully observe all indications
to the side of the pictogram that
limit some actions in order to ensure grea-
ter safety for the operator.
MAIN GUARANTEE
CONDITIONS
• The guarantee does not includ pay-
ment for damages due to incorrect
installation by the installer.
• The guarantee does not include pay-
ment for damages due to the improper
use of the unit by the user.
• The manufacture is not responsible for
injuries to the installer or user, caused
by incorrect installation or improper
use of the unit;
• The equipment must be installed in
such a manner so as to allow mainte-
nance and/or repair operations;
• The guarantee does not cover in any
case costs due to turntable ladders,
scaffolding or othe similar elevating
systems that are necessary to carry
out operations under guarantee.
The guarantee is not valid if:
• the services and repairs have been
carried out by unauthorised personnel
or companies;
• the unit has been previously repaired
or modified with non original parts;
• the unit has not been suitably maintai-
ned;
• the instructions illustrated in the pre-
sent manual have not been observed;
• unauthorised modifications have
been made.
Note:
The manufacturer reserves the right to
carry out modifications at any time dee-
med necessary to improve their product,
and are not obliged to apply the said
modifications to previously manufactured
machines that have already been delive-
red or are being constructed.
The general conditions are in any case
subject to the general sale conditions
included on the stipulation of the con-
tract.

High efficiency heat recovery unit with cooling circuit - RHE -
5
Selection, installation, use and maintenance manual
GB
Field 1, 2, 3: RHE
Field 4, 5: sizes 10 - 15 - 25 - 33
Description of the unit
The RHE series is the mono-block
solution to the needs of systems
normally used in bars, restaurants,
offices, meeting rooms. The RHE units,
which are divided into four sizes with
a rated airflow from 1000 to 3300
m3/h, have been designed to guarantee
a wellbeing conditions allowing a
suitable air change in order to reduce
the build-up of gas and undesired
particles present in the environment
to be treated (CO2, cigarette smoke,
unpleasant odours, sweat, dust,.).
The peculiarity of these series is repre-
sented by the high efficiency got thanks
the use of the cross flows plate recupe-
rator combined with a cooling circuit
in heat pump operating with refrigerant
R410A.
The RHE unit, in addition to the
ventilation, filtration and recovery of
heat, also includes, in a mono-bdamper
unit, a heat pump refrigerating circuit.
This allows to obtain a complete
machine which operates independently
in all seasons and which is capable of
combining the necessary renewal of air
with an efficient recovery of heat.
The accurate design of the machine
combines the extremely compact size,
which makes installation on suspended
ceilings easier, with easy accessibility
for the maintenance of all internal parts.
This gives the opportunity, also thanks
to the management and installation
simplicity, to satisfy many system
requirements.
WARNING
The RHE series is made to guarantee
indoor air supply and extraction. The
refrigerating circuit is calculated not
only for giving supply air characteristi-
cs near to that of the indoor air, with
the aim of avoiding disease conditions
near vents, but also for covering in part
ambient thermal loads.
Thermal and refrigerating capacities,
which carry air conditions from the
indoor air ones to those who cover in
part ambient thermal loads, are referred
to as thermal available capacity and
refrigerating available capacity. These
capacities are only an integration of
those guaranted by a conditioning unit.
The RHE series is not a conditioning
unit, and it cannot be set apart from a
conditioning unit if prefixed indoor air
conditions (temperature and humidity)
have to be guaranteed.
Available versions
The RHE units are available in 4
different sizes: Each model can be
configured in such a manner to satisfy
the system requirements by suitable
combining the available options.
The table in fig. 01 shows the procedure
of the commercial acronym in the
6fields from which it is made.
fig.01
Cooling circuit
accessibility
Condensate dischar-
ge 1” J UNI 338
Exhaust fan
Supply fan
Condensate dischar-
ge 1” J UNI 338
By-pass for free-
cooling
Room air suction
Outside air suction
Electrical panel

High efficiency heat recovery unit with cooling circuit - RHE -
6
Selection, installation, use and maintenance manual
GB
Description of the components
Panels and frame:
The frame is made up of 25 mm thick
galvanised self-supporting sandwich panels
with injected polyurethane insulation (
density of 42 kg/m
3
) and nylon reinforced
corners with glass fibre. The construction
of the casing simplifies installation and
maintenance.
Fans:
They are centrifugal fans with forward-
curved blades and with directly connected
motor. The 230V - 50 Hz single-phase motor
has one speed. The airflow in case of pressure
drops changes of internal components
(clogging filters) and distribution system
remains costant.
Refrigerating circuit
This is a highly efficient and silent heat
pump with scroll or rotative compressor
operating with refrigerant R410A (according
to sizes), four-way valve for cycle inversion,
evaporating coil, safety valve, condensing
coil, liquid receiver, thermostatic valve,
liquid light , high/low pressure switch and by
pass valve (for little sizes).
Condensate drain pan:
made of aluminium alloy, removable and
with double discharge.
Evaporating/condensating coil:
with cupper grooved tube and high efficiency
aluminium fins.
Filters:
these are cell undulated type placed before
the recovery unit on the supply and return
airflow. The standard filters are class G4 type
in accordance with classification UNI EN
779 with weighted efficiency of 90%. They
are 48 mm thick and are easily removable
from the top or bottom of the unit for to do
the cleaning or replacement.
Dirty filters pressure switch:
A differential pressure switch is present, pla-
ced close to the electronic controllers, for the
detection of the supply filter clogging. The
interventation value can be set. The pressure
switch includes clean contacts (NA, NC) to
remote the alarm.
Heat recovery unit:
This is static cross flows recuperator
made of aluminium sheets to grant high
performances. During winter operation, the
average efficiency is above 80% for the first
two sizes and 70% for the last two sizes,
ensuring first-class energy recovery from the
air expelled from the room.
Support brackets:
They allow the unit to be rapidly and securely
fixed to the false ceiling.
Accessibility:
The heat recovery, the condensate tank, fans
and filters are removable from the bottom,
removing the two lower panels (if the unit
is hanging), the same can be easily removed
from the air by removing the two top panels
(if units is on the ground). The inspection
of the electrical panel and the circuit is
guaranteed by side panels. For the inspection
of the filters, in both the cabinet and the floor
version, you can disassemble the openings
on the top and bottom panels are fastened
with flyers.
Regulation
The unit is equipped with an electrical panel
with power and regulation section (including
the three-way valve for the additional hot
water coil and related servomotor), aimed
at guaranteeing the management of all
refrigerating circuit functions. Also present:
NTC temperature probe on the internal air
recovery, external air temperature probe,
pressure switch on the supply filter.
With the free-cooling accessory are supplied
dampers and servomotors.
A remote control terminal is also supplied
for the automatic management of the unit,
remotable up to 150 meter (cable not supplied).
The unit is equipped for the management of
a luminous sign (230V) which switches on in
case of generic alarm or unit OFF, in conformity
with the norms in force for rooms for smokers.
The following operations can be performed on
the microprocessor: switching on and off of the
unit, summer/winter changeover, setting of set-
point parameters, reading of room temperature
.
N.B. For further information refer to
the user manual.
Key
1 Cooling circuit
2 Electric board
3Centrifugal fan
4G4 Filter
5Heat recovery unit
6Exchange coil
7Condensate discharge
8Fans inverter
RHE 10-15
1
2
8
7
3
6
5
4

High efficiency heat recovery unit with cooling circuit - RHE -
7
Selection, installation, use and maintenance manual
GB
fig.02
Accessories
MBCH Hot water coil module
This is an external module that can be
installed downstream from the motor
fan assembly on the fresh air flow,
equipped with:
• Two-row water heating coil
with copper pipes and aluminium fins
with P2519 geometry. The collectors
are equipped with a ½" G UNI 338
threaded connector for the water inlet
and outlet.
• The three-way valves and
related ON/OFF actuator.
MBCX Module with battery
This is an outside module that can be
installed downstream from the motor
fan assembly on the fresh air flow,
equipped with:
• Electric battery with armoured
finned elements.
• double safety thermostat with
automatic and manual reset.
FCT F7 efficiency filters
The units can be fitted with two
cell-type undulated filters in class
F7 according to the UNI EN 779
classification which can be placed as
a replacement of the G4 filters. The
filtrating cell is 48 mm thick.
MSS Module with silencers
The accessory is made up of one
module that is equipped with silencer
positioned on the supply or exhaust.
(For sizes 10 and 15, the accessory is
only inlet compatible).
It is made of rockwool panels with
the surfaces in contact with the air
and protected by a polyester film held
between two galvanised and micro-
perforated laths.
FGE circular flanges
One accessory is supplied.
The accessory should be joined to the
rectangular openings of the base unit
in such a way as to allow for the use
of circular channels. The accessory
is not compatible with the MBCH,
MBCX, MSS and FBH accessories. NB
for further information refer to the
tables in this manual and to the various
accessory kits; for compatibility refer
to fig. 02
FCH Free-cooling kit
It allows for the unit operation in free
cooling (temperature only).The “free-
cooling kit ” includes 2 dampers with
related ON/OFF 230V servomotors.
For further information refer to the Use
manual.
BIT Base for floor installation
BIM Base for floor installation of the
additional modules
The accessories, equipped with a metal
frame with high 120 mm, allow to tran-
sform the standard unit to a unit which
can be placed on floor.
TPE Roof for outside installation
TPM Roof for outside installation
of the additional modules
TPMSS Roof for outside installation
of the silencers modules
This accessory, made of galvanized sheet,
allows for the protection from rainings for
unit and its accessories.
*: supplied with appendages near the
speed regulators on the outside of the
base unit, to protect these from solar irra-
diation.
RS485 Interface card
Interface card necessary for the interface
to supervisione systems according to the
MOD-BUS protocol.
MBCH MSS FGE
MBCX
Size
Accessories and description 10 15 25 33
MBCH Module with hot water coil MBCH1 MBCH2
MBCX Module with electric battery MBCX1 MBCX2 MBCX3 MBCX4
BIM Base for addit. modules floor install BIM1
TPM Roof for add. modules outside install TPM1 TPM2
FCT Compact filters efficiency class F7 FCT1 FCT2 FCT3
BIT Base for floor installation BIT1 BIT2 BIT3
TPE Roof for outside installation TPE1 TPE2 TPE3
FCH Free-cooling Kit FCH1 FCH2
RS485 RS485 cards RS485
MSS Silencers modules MSS1 MSS2
TPMSS Roof for silencers outside installation TPMSS1 TPMSS2
FGE Circular flanges FGE1

High efficiency heat recovery unit with cooling circuit - RHE -
8
Selection, installation, use and maintenance manual
GB
Technical data
Caution: the electronic regulators that are
incorporated in the machine allow to regulate
the air flow in the limits indicated in the
previous table in order to set the system. Once
setting has been completed, the regulators no
longer need to be touched.
1) Fan power supply: 230 V; nominal airflow rate;
without accessories;
(2) Operating conditions: return air 26°C 50%, external
air 34°C 50%;
(3) Operating conditions: return air 20°C 50%, external
air -5°C 80%;
(4) At a free field distance of 1 m with ports canalized.
RHE MODEL 10 15 25 33
External maximal air flow [m3/h] 1000 1500 2500 3300
Recovery maximal air flow [m3/h] 1000 1500 2500 3300
Minimum air flow [m3/h] 800 1000 2000 2500
Supply static available pressure (1) [Pa] 320 245 140 220
Exhaust static available pressure (1) [Pa] 320 245 140 220
Total heating capacity (rec. + compr.) (3) [kW] 7,5 14,2 24,8 33,1
Total cooling capacity (rec. + compr.) (2) [kW] 6,6 8,7 13,8 19,8
Available heating capacity (3) [kW] 2,8 2,9 3,9 7,0
Available cooling capacity (2) [kW] 1,8 3,1 3,3 5,4
Recovered heating capacity (3) [kW] 3,6 10,0 15,3 19,6
Recovered cooling capacity (2) [kW] 2,2 3,2 4,5 5,8
Refrigerating circuit heating capacity (3) [kW] 3,9 4,2 9,5 13,5
Refrigerating circuit cooling capacity (2) [kW] 4,4 5,5 9,3 14,0
Tot. input power in winter (3) [kW] 2,2 2,4 4,2 4,9
Tot. input power in summer (2) [kW] 2,6 2,9 5,1 6,5
Sound pressure level (4) [db(A)] 66 69 72 75
Power supply 1-230-50 1-230-50 3+N-400-50 3+N-400-50
RECUPERATOR
Efficiency in winter [%] 82 80 73 71
Efficiency in summer [%] 82 80 68 65
FANS
Fans number 2222
Total nominal input power [kW] 0,9 0,9 2,1 2,1
Total max. absorbed current [A] 7,6 7,6 10,5 10,5
Protection class IP 55 55 55 55
FILTERS
Classification according to EN779 G4 G4 G4 G4
Weight efficiency [%] 90 90 90 90
Classification according to EN779 (filters, accessories) F7 F7 F7 F7
Additional pressure drop for F7 filters (optional) Δ[Pa] 35 59 58 63
REFRIGERATING CIRCUIT (COMPRESSOR)
Refrigerant R410A R410A R410A R410A
Compressors input power in winter (3) [kW] 1,3 1,5 2,1 2,8
Compressors input power in summer (2) [kW] 1,7 2,0 2,8 4,4
Compressors max. absorbed current [A] 10,0 11,0 7,0 10,3
CONDENSATE DRAN PANEL
Diameter of the condensate dran panel charge [in] 1” 1” 1” 1”

High efficiency heat recovery unit with cooling circuit - RHE -
9
Selection, installation, use and maintenance manual
GB
1) Inlet/outlet water temperature 70/60°C. Compressor
running. Operating conditions: return air 20°C 50%,
external air -2°C 80%;
(2) Inlet/outlet water temperature 45/40°C. Compressor
running. Operating conditions: return air 20°C 50%,
external air -5°C 80%;
MBCH - Water heating coil 10 15 25 33
Rows [n] 2222
Front surfaces [m2]0,238 0,238 0,238 0,314
Air side pressure drop at nominal flow rate [Pa] 7 183737
Heating capacity (1) [kW] 7,68 10,35 15,56 19,7
Heating capacity (2) [kW] 2,57 4,04 6,45 7,6
Water flow rate (1) [l/h] 673 906 1363 1725
Water side pressure drop (nominal conditions) (1) [kPa] 1181832
Water flow rate (2) [l/h] 446 700 1118 1311
Water side pressure drop (nominal conditions) (2) [kPa] 3 6 14 22
Water coil manifolds diameter [in] 3/4” 3/4” 3/4” 3/4”
MBCX - Electric heating coil
Power supply 3 ph - 400 V - 50 Hz (power supply separated from unit power supply)
Heating capacity [kW] 5 7,5 12,5 16,5
Air side pressure drop at nominal flow rate [Pa] 10 10 10 10
Stages [n] 1111
Electric absorbed current [A] 7,6 11,4 19,0 25,1
ACCESSORIES

High efficiency heat recovery unit with cooling circuit - RHE -
10
Selection, installation, use and maintenance manual
GB
Operating limits
In their standard set-up, the equipment
is not suitable for installation in a saline
environment. Refer to fig. 03 for the
operating limits.
N.B: Please contact FAST technical
sales office in the event it is necessary
to operate the machine outside the
limits indicated in the diagram.
Summer operation Winter operation
(heat pump)
fig.03
10 15 21 33
Max external temperature during cooling °C 43 43 43 43
Min external temperature during cooling °C 16 16 16 16
Max internal temperature during cooling °C 34 34 34 34
Min internal temperature during cooling °C 18 18 18 18
Min external temp with heat pump operating °C -10 -10 -10 -10
Max external temp with heat pump operating °C 28 28 28 28
Max internal temp with heat pump operating °C 30 30 30 30
Min internal temp with heat pump operating °C 14 14 14 14
Pressione sonora per frequenza centrale di banda (Hz) Press. sonora Press. sonora Pot. sonora
RHE 63 125 250 500 1000 2000 4000 8000 Totale Totale Totale
dB dB dB dB dB dB dB dB dB dB (A) dB (A)
10 57 58 51 50 50 43 39 33 63 54 64
15 61 64 56 50 49 46 40 33 66 56 67
25 62 68 57 53 49 47 46 36 70 56 68
33 65 72 64 56 52 48 42 37 72 60 73
Sound data
• Sounda data attenuation with SUF - Module with silencers (accessory)
63 125 250 500 1000 2000 4000 8000
dB dB dB dB dB dB dB dB
MSS 9 0 2 5 5 9 14 11
• Data outside the panel: (the data are calculated at the following conditions: 1 m. distance from the unit, ducted supply vent and in free field)
35
0
43
39
22
19
16
18 26 34
t int (°C)
t ext (°C)
10
30
-10
t int (°C)
t est (°C)
28
14 20 30
0

High efficiency heat recovery unit with cooling circuit - RHE -
11
Selection, installation, use and maintenance manual
GB
Cooling Performance variations
The RHE series heat recovery unit with
refrigerating circuit allow the renewal of
the internal air giving the necessary hourly
change in order to obtain the ideal comfort
conditions.
The use of a high efficiency cross-flow heat
recovery unit and a heat pump refrigerating
circuit allows, in most applications and in
the most common external air temperature
conditions, in addition to the neutralisation of
the heating load of the external air, to supply
an adequate heating and cooling capacity to
compensate the internal heating loads.
The fig. 4 illustrates the graph from which
it is possible to draw the coefficients to be
multiplied by the nominal values which
are present in the technical data table to
determine the total refrigerating and heating
performance based on the outside conditions.
External air temperature [°C]
Key
Room air temperature
Summer operation: 26 °C 50% UR fig.04
Heating performance
Muilti plicative Coefficient








 
     
Cooling performance
Room air temperature
Winter operation: 20 °C 50% UR
Coefficienti moltiplicativi per la resa frigorifera e termica al variare della temperatura aria ambiente in regime estivo ed invernale:
SUMMER OPERATION:
Room conditions 22°C, 50% RH --> corrective coefficient = 1,050
Room conditions 24°C, 50% RH --> corrective coefficient = 1,025
Room conditions 26°C, 50% RH --> corrective coefficient = 1
Room conditions 28°C, 50% RH --> corrective coefficient = 0,975
WINTER OPERATION:
Room conditions 18°C, 50% RH --> corrective coefficient = 0,980
Room conditions 20°C, 50% RH -->corrective coefficient = 1
Room conditions 22°C, 50% RH --> corrective coefficient = 1,020
Room conditions 24°C, 50% RH --> corrective coefficient = 1,040
MOLTIPLICATIVE COEFFICIENTS FOR THE COOLING AND HEATING PERFORMANCE TO ROOM AIR TEMPERATURE VARIATION IN SUMMER/WINTER OPERATION

High efficiency heat recovery unit with cooling circuit - RHE -
12
Selection, installation, use and maintenance manual
GB
Inlet air temperature variation (°C)
Conditions: exhaust air 26°, 50% RH.
Outside air temperature (°C)
Fresh air temperature variations on the change of the
external air temperature
The following charts allow to determine
the variation of the temperature within
the room on the variation of the external
conditions. The variability of the air flows
is that allowed to guarantee that the
refrigerating circuit operates correctly.
Note:
The following diagrams are
representative for all sizes, but without
accessories.
Summer operation
Outside air temperature (°C)
eyConditions: exhaust air 20°, 50% RH.
Winter operation
Inlet air temperature variation (°C)
15
10
5
0
-5
-10
-15
-15 -10 -5 0 5 10 15 20 25
3
2
0
1
-1
0
-2
-3
-4
242628303234363840
N
OMINAL
FLOW
RATE
N
OMINAL
FLOW
RATE
F
LOW
RATE
+10%
FLOW
RATE
-10%
F
LOW
RATE
+10%
FLOW
RATE
-10%

High efficiency heat recovery unit with cooling circuit - RHE -
13
Selection, installation, use and maintenance manual
GB
Heating efficiencies and accessories pressure drops BCH, MSS
The diagram in fig. 06 allows to determine
for each model, according to the water
temperature and otside air temperature
variation the corrective factor to multiply for
the nominal capacity value are present in
the technical data table.
Fig. 07 illustrates the pressure drops (Pa) on
the air side based on the flow rate for the
MBCH and MSS accessories
Fig. 08 illustrates the pressure drops (kPa)
water side of the MBCH accessory coil.
Note:
The pressure drops illustrated in the
diagram also include those of the three-way
valve.








      
fig.06
Outside air temperature [°C]
fig.08
Water flow [l/h]
kPa
Air flow [m3/h]
Pa fig.07
70/60°C
Corrective coefficient
Pressure drop on air side
Pressure drop on water side
45/40°C
20
25
30
35
40
45
50
MBCH 25
MSS 1
MBCH 33
MSS 2
0
5
10
15
20
0 500 1000 1500 2000 2500 3000 3500 4000
MBCH
10
MSS 1
MBCH 15
MSS 1
70
50
60
40
50
30
40
20
MBCH1
10
MBCH2
0
0 500 1000 1500 2000 2500

High efficiency heat recovery unit with cooling circuit - RHE -
14
Selection, installation, use and maintenance manual
GB
Refrigerating circuit summer operation
KEY
CP Compressor
BC Condensing coil
BE Evaporating coil
FFilter
RL Liquid receiver
PA High pressure probe
VIC Inversion valve
AP High pressure switch
BP Low pressure switch
PA
VIC
AP
BP
CP
F
RL
BC FRESH AIR FAN
BE
EXHAUST FAN

High efficiency heat recovery unit with cooling circuit - RHE -
15
Selection, installation, use and maintenance manual
GB
Refrigerating circuit winter operation
KEY
CP Compressor
BC Condensing coil
BE Evaporating coil
F Filter
RL Liquid receiver
PA High pressure probe
VIC Inversion valve
AP High pressure switch
BP Low pressure switch
EXHAUST FAN FRESH AIR FAN
PA
VIC
AP
BP
CP
F
RL
BE
BC

High efficiency heat recovery unit with cooling circuit - RHE -
16
Selection, installation, use and maintenance manual
GB
Dimensions
RHE 10-15
Weights and c.g. kg Gx Gy
RHE 10 300 700 650
RHE 15 310 740 745
Gx
Gy
FILTER ACCESSIBILITY
CONDENSATE DISCHARGE 1” J
UNI 338
CONDENSATE DISCHARGE 1” J
UNI 338
FILTER ACCESSIBILITY
SUPPLY FAN EXHAUST FAN
BY-PASS FOR FREE-COOLING COOLING CIRCUIT
ACCESSIBILITY
OUTSIDE AIR
SUCTION
ROOM AIR
SUCTION
COOLING CIRCUIT
ACCESSIBILITY
ELECTRICAL
PANEL
OUTSIDE AIR
SUCTION

High efficiency heat recovery unit with cooling circuit - RHE -
17
Selection, installation, use and maintenance manual
GB
Weights and c.g. kg Gx Gy
RHE 25 373 1130 920
Gx
Gy
RHE 25
FILTER ACCESSIBILITY
FILTER ACCESSIBILITY
CONDENSATE DISCHARGE 1” J
UNI 338
CONDENSATE DISCHARGE 1” J
UNI 338
BY-PASS FOR FREE-COOLING
OUTSIDE AIR
SUCTION
ROOM AIR
SUCTION
SUPPLY FAN EXHAUST FAN COOLING CIRCUIT
ACCESSIBILITY
ELECTRICAL
PANEL

High efficiency heat recovery unit with cooling circuit - RHE -
18
Selection, installation, use and maintenance manual
GB
Weights and c.g. kg Gx Gy
RHE 33 410 1365 1145
Gx
Gy
RHE 33
FILTER ACCESSIBILITY
FILTER ACCESSIBILITY
CONDENSATE DISCHARGE 1” J
UNI 338
CONDENSATE DISCHARGE 1” J
UNI 338
BY-PASS FOR FREE-COOLING OUTSIDE AIR
SUCTION
ROOM AIR
SUCTION
electrical panel Inspect Refrigerant circuit inspec

High efficiency heat recovery unit with cooling circuit - RHE -
19
Selection, installation, use and maintenance manual
GB
Accessories Dimensions
MSS - Silencers Modules
Mod. [mm] RHE 10-15-25
MSS 1
RHE 33
MSS 2
A 684 846,5
B 684 684
C 574 574
D 500 500
E59 59
F59 59
G16 16
H 718 880,5
I 12,5 12,5
L 342 432,5
M 287 287
N 624 624
A
BC
Mod. [mm] RHE 10-15
BIT 1
RHE 25
BIT 2
RHE 33
BIT 3
A 1490,5 1978 2303
B 1490,5 1490,5 1815,5
C 120 120 120
BIT - Base for floor installation
LL
M
M
I
I
I
I
C
D
H
N
B
A
GFFGE
E

High efficiency heat recovery unit with cooling circuit - RHE -
20
Selection, installation, use and maintenance manual
GB
MBCH - Module with water coil MBCX - Module with electric coil
B
C
Z
V
TUIL
M
HG
F
A
D
E
E
N
O
S
RQ
P
EF
C
OP
QR
B
A
N
N
N
N
M
L
IH
G
V
U
T
S
D
Mod. [mm] RHE 10-15-25
MBCX 1-2-3
RHE 33
MBCX 2
A 610 772,5
B 574 574
C 359 359
D 718 880,5
E 342 423
F 342 423
G 500 500
H 250 287
I 287 287
L37 37
M61 61
N 12,5 12,5
O 110 110
P78 76
Q68 71
R 150 150
S 225 225
T59 59
U59 59
V16 16
Mod. [mm] RHE 10-15-25
MBCH 1
RHE 33
MBCH 2
A 684 846
B 359 359
C 574 574
D 610 772
E 12,5 12,5
F 500 500
G 290 287
H 284 287
I 339 423
L 345 423
M 12,5 12,5
N 748 910,5
O 718 880,5
P 225 225
Q59 59
R59 59
S16 16
T 201 201
U 158 158
V79 79
Z50 50