AERMEC WRL 200 User manual

Certificate No.
U8131286304002
Tested according to:
UL 1995:2011
REVERSIBLE CHILLER - Technical Manual
IWRLPY. 1403. 5890710_01
EN
WRL 200-400-500
WATER/WATER CHILLER
• HIGH EFFICIENCY
• MAXIMUM WATER OUTLET TEMPERATURE 55°C/131°F
• DESUPERHEATER
• SUITABLE FOR GEOTHERMAL APPLICATIONS

AERMEC S.p.A. reserves the right at all times to make any modification for the improvement of its product and is not obliged to add these modification
to machines of previous manufacture that have already been delivered or are being built.
Dear customer,
Thank you for choosing AERMEC. It is the fruit of many years of experience and special design stud-
ies and has been made of the highest grade materials and with cutting edge technology.
The quality level is being constantly monitored, so AERMEC products are synonymous with Safety,
Quality and Reliability.
The data may undergo modifications considered necessary for the improvement of the product,
at any time and without the obligation for any notice thereof.
Thank you again.
AERMEC S.p.A

Summary
1. General warnings ...................................................................4
  ....................................... 4
 ..............................................................................4
1.3. Warranty ................................................................................4
 ........... 4
 ............................................................. 4
 .......................................................... 4
  ........................................................................... 5
4. Ceck list .................................................................................. 5
  ......................................... 6
  .................................................... 7
5.1. Structure................................................................................. 7
5.2. Cooling circuit......................................................................... 7
5.3. Hydraulic circuit...................................................................... 7
5.4. Safety and control .................................................................. 7
 ..................................... 7
6. Accessories............................................................................. 9
  ............................................. 9
7. Technical data ......................................................................10
7.1. Heat pump water side inversion [ ° ] .................................... 10
 ....................................................................13
  ........................................ 13
 condenserless version..........................13
8.3. Design data...........................................................................13
 
values - standard versions .................................................... 14
9.1. Cooling capacity and input power........................................ 14
  ................................... 14
9.3. Fouling factors...................................................................... 14
  ....................................... 15
  ................................... 15
9.6. Fouling factors...................................................................... 15
9.8. Cooling capacity and input power........................................ 16
  ................................... 16
9.10. Fouling factors...................................................................... 16
10. Pressure drops...................................................................... 17
11. Minimum/maximum water content in the system...............20
 ................................................ 20
13. Ethylene glycol......................................................................21
14. Propylenic glycol...................................................................21
15. Sound data ...........................................................................22
15.1. Sound level of wrl standard version ..................................... 22
 ...................................... 22

Standards and directives to be followed
in the design and manufacture of the
unit:
STANDARD
1. UL 1995 Heating and
cooling equipment
2. ANSI/NFPA Standard 70 National
Electrical code (N.E.C.)
3. CSA C.22.1.- C.22.2 Safety Standard
Electrical Installation
SAFETY LEVEL
1. IP24
ACOUSTIC PART
1. sound intensity
method

This unit contains fluorinated gre-
enhouse gases covered by the Kyoto
Protocol. Maintenance and disposal
operations must be only carried out
by qualified staff, in compliance with
existing laws.
example of technical plate
ATTENTION
Tampering, removal, lack of the
identification plate or other does
not allow the safe identification
of the product and will make
any installation or maintenance
operation to be performed difficult.
1. GENERAL WARNINGS
The WRL AERMEC units are constructed
according to the recognised technical
standards and safety regulations. They are
designed for summer and winter conditioning
and the production of domestic hot water.
Any contractual or extracontractual liability
of the Company is excluded for injury/
damage to persons, animals or objects owing
to installation, regulation and maintenance
errors or improper use. All uses not expressly
indicated in this manual are prohibited.
1.1. PRESERVATION OF THE
DOCUMENTATION
The instructions along with all the related
documentation must be given to the user of
the system, who assumes the responsibility
to conserve the instructions so that they are
always at hand in case of need.
Read this sheet carefully; the execution of all
works must be performed by qualified staff,
according to Standards in force on this subject
in different countries. (Ministerial Decree
329/2004).
1.2. INSTALLATION
The unit must be installed in such a way that
maintenance and/or repairs can be carried out.
1.3. WARRANTY
The appliance warranty does not cover the
costs for ladder trucks, scaffolding, or other
elevation systems that may become necessary
for carrying out servicing under warranty.
Do not modify or tamper with the unit as
dangerous situations can be created and the
manufacturer will not be liable for any damage
caused. The validity of the warranty shall be
void in the event of failure to comply with the
above-mentioned indications.
1.4. WARNINGS REGARDING SAFETY AND
INSTALLATION STANDARDS
• The unit must be installed by a qualified
and suitably trained technician, in compli-
ance with the national legislation in force
in the country of destination (Ministerial
Decree 329/2004).
AERMEC will not assume any re-
sponsibility for damage due to fail-
ure to follow these instructions.
• Before beginning any operation, READ
THESE INSTRUCTIONS CAREFULLY AND
CARRY OUT THE SAFETY CHECKS TO
AVOID ALL RISKS. All the staff involved
must have thorough knowledge of
the operations and any dangers that
may arise at the moment in which the
installation operations are carried out.
2. PRODUCT IDENTIFICATION
The units can be identified through:
• PACKING LABEL which shows the
product identification data
• TECHNICAL PLATE
2.1. TECHNICAL PLATE POSITION
4IWRLPY. 1403. 5890710_01

COOLING CIRCUIT WRL 200 WRL 400 WRL 500
CONFIGURATION ° D E ° D E ° D E
Compressor • • • • • • • • •
Discharge check valve • • • • • • • • •
Condenser exchanger • • n.a. • • n.a. • • n.a.
Evaporator exchanger • • • • • • • • •
 n.a. • n.a. n.a. • n.a. n.a. • n.a.
Hot gas by-pass valve n.a. • n.a. n.a. • n.a. n.a. • n.a.
 •••••••••
Liquid sight glass • • • • • • • • •
 •••••••••
 •••••••••
Low pressure transducers • • • • • • • • •
High pressure transducers • • • • • • • • •
High pressure switch • • • • • • • • •
HYDRAULIC CIRCUIT External and
system side
pump
WRL 200 WRL 400 WRL 500
CONFIGURATION ° D E ° D E ° D E

(evaporator)
no pump •••••••••
pump •••••••••
Flow switch
(Evaporator)
no pump •••••••••
pump •••••••••
Safety valve
(evaporator and condenser)
no pump •••••••••
pump •••••••••
Expansion vassel
(evaporator and condenser)
no pump n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a.
pump •••••••••
Drain valve
(evaporator and condenser)
no pump •••••••••
pump •••••••••
Key:
• available
n.a. not available
PRESENTATION
AERMEC presents the new WRL units, HYDRAU-
LIC CIRCUIT REVERSIBLE CHILLER, optimised for
geothermic systems that are water-cooled and
operate with R410A refrigerant.
TYPE UNIT
They are indoor units with hermetic scroll com-
pressors that perfectly meet the requirements
of the residential market:
HIGH PERFORMANCE
These units have been designed optimising
functioning in heat pump mode, allowing to
reach high efficiencies.
EASY INSTALLATION
The electric and hydraulic connections are
all positioned in the upper part of the unit
facilitating the installation and maintenance
operations. This also allows to reduce the tech-
nical spaces and their positioning in as smaller
space possible.
SILENT
The units are distinguished for their silent
operation.
Careful soundproofing of the unit with suitable
sound-absorbent material confer all units with
noise limits that allow them to be used in
homes and not necessarily in dedicated techni-
cal premises.
THE UNITS ARE OPTIMISED FOR
Geothermic systems Production of water for
heating systems with fan coils, radiant PANELS
or LOW TEMPERATURE RADIATORS,
up to 55°C/131°F.
3. PRESENTATION
4. CECK LIST
5
IWRLPY. 1403. 5890710_01

4.1. DESCRIPTION AND CHOICE OF THE UNIT
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
WRL 200 X ° ° ° U ° ° S °
Field:
1 2 3 Code WRL
4 5 6 Size 200, 400, 500
7 Field of use
°standard mechanical thermostatic valve (min. water out temp +4°C)
Ymechanical thermostatic valve (water outlet temp range -8 ÷ 4°C)
Xelectronic thermostatic valve (min. water out temp +4°C, contact the factory for lower temperatures)
8 Model:
°heat pump water side inversion
Econdenserless, ONLY for water side inversion (DATA ON DEMAND)
9 Version:
°standard
10 Heat recovery
°without heat recovery
Dwith desuperheater
11 External side pump
°without hydronic kit
Uhigh head pump
Vmodulating 2 way valve
12 System side pumps
°without hydronic kit
Nhigh head pump
13 Reserved blank
°
14 Soft start
°without soft start
Ssoft start
15 Power supply
6230V 3 60Hz with magnetic circuit breaker
7460V 3 60Hz with magnetic circuit breaker
8575V 3 60Hz with magnetic circuit breaker
6IWRLPY. 1403. 5890710_01

5. DESCRIPTION
OF COMPONENTS
5.1. STRUCTURE
BASEAND SUPPORT STRUCTURE
Made up from hot galvanised sheet steel
elements with suitable thickness. All parts
painted with polyester powder paints (RAL
9002), resistant to atmospheric agents.
Realised in a way to allow total accessibility
to the components internal components. All
panels are covered with sound-absorbent
material with suitable thickness.
5.2. COOLING CIRCUIT
COMPRESSOR
High efficiency scroll hermetic compressors
(mounted on anti-vibration supports),
activated by a 2-pole electric motor with
internal heat protection.
DISCHARGE CHECK VALVE
CONDENSER EXCHANGE
Plate type (AISI 316). It is insulated externally
with closed cell material to reduce thermal
dispersions.
EVAPORATOR EXCHANGE
Plate type (AISI 316). It is insulated externally
with closed cell material to reduce thermal
dispersions.

Unit with (AISI 316) heat plate, insulated
externally with closed cell material to reduce
heat loss.

Hot gas By-pass valve injection, hot gas device
injection upstream of the evaporator.
DEHYDRATOR FILTER
Mechanical dehydrator filter realised in
ceramics and hygroscopic material, able to
withhold impurities and any traces of humidity
present in the cooling circuit.
LIQUID SIGHT GLASS
MECHANICAL THERMOSTATIC VALVE
The mechanical valve, with external equaliser
positioned at the evaporator inlet, modulates
the flow of gas to the evaporator, according
to the heat load, in order to ensure a correct
heating level of the intake gas.

The valve modulates the flow of gas to the
evaporator, according to the heat load, in order
to ensure a correct heating level of the intake
gas.
5.3. HYDRAULIC CIRCUIT
WRL STANDARD VERSION
(SUPPLIED AS STANDARD)
WATER FILTER
Equipped with steel filtering mesh; prevents
the heat exchangers from clogging.
FLOW SWITCH
It checks that here is water circulation.
Adversary, it blocks the unit.
bar/87PSI
Equipped with a piped discharger and
intervenes by discharges the over pressure in
case of anomalous pressures.
DRAIN VALVE
WRL PUMP/PUMPS VERSION
(SUPPLIED AS STANDARD)
WATER FILTER
Equipped with steel filtering mesh; prevents
the heat exchangers from clogging.
FLOW SWITCH
It checks that here is water circulation.
Adversary, it blocks the unit.
bar/87PSI
Equipped with a piped discharger and
intervenes by discharges the over pressure in
case of anomalous pressures.
EXPANSION VASSEL
With nitrogen pre-load membrane.
DRAIN VALVE
5.4. SAFETY AND CONTROL
LOW PRESSURE TRANSDUCERS
Placed on the low pressure side of the cooling
circuit, it signals the work pressure to the
control board, generating a pre-warning in case
of anomalous pressures.
HIGH PRESSURE TRANSDUCER
Placed on high pressure side of cooling circuit,
signals the work pressure to control board,
generating a pre-warning in case abnormal
pressure occurs.
HIGH PRESSURE PRESSURE SWITCH
With fixed calibration, placed on high pressure
side of cooling circuit, inhibits functioning of
compressor if abnormal work pressure occurs.
5.5. ELECTRIC CONTROL BOARD
AND REGULATION
Electric power and control board,
manufactured in compliance with the EN
60204-1/IEC 204-1 Standards, complete with:
• door lock main isolating switch,
• magnet circuit breaker switches and
contactors for compressors,
• phase sequence control,
• connection clamps to the remote
keyboard (OPTIONAL),
• clamps for signalling the remote alarm,
• clamps for signalling compressor switch-
on status,
• clamps for boiler/resistance alarm signal,
• clamps for differential pressure switch
alarm signal,
• clamps for external air temperature
probe (ACCESSORY),
• electronic control µPC,
• soft-start (OPTIONAL),
• control circuit numbered cables,
• clamps for 3-way valve,
• 0-10V clamps for modulating valve
control.
Electronic controller µPC
The device is the new controller for
management of the water-cooled reversible
units; the new PGD1 8-digit display is clearly
legible, while the icons provide immediate
visibility of machine operation.
Some accesses are protected by password
and only available to the after-sales technical
service.
The electronics also integrates a series of
protection algorithms with the purpose
of preventing any damage to the main
components of the system.
FUNCTIONALITY LIST:
1. Parameterisation of the compressor
switch-on/off times prevent switch on/off
activation at short intervals.
2. In order to prevent breakage of the
plate heat exchanger due to freezing
water, 3 antifreezes, “geothermic, system
and zones” are envisioned which are
contained within. The microprocessor
also envisions compressor block,
whenever the temperature detected by
the heat exchanger output probe is lower
than the anti-freeze set.
3. Water flow rate alarm activated by the
differential pressure switches installed
in series.
4. Condensation control is managed via
speed modulation of the pumps with
phase cut systems or inverters, a 2-way
modulating valve and ON/OFF pumps.
5. Production of DHW through a 3-way
diverter valve or the total recovery
version.
7
IWRLPY. 1403. 5890710_01

Additional functions:
• Control of an external integration
resource dedicated to DHW.
• System control with heat pump and boiler.
• Anti-Legionella cycle.
• Time periods for the daily /
weekly programming.
Heat regulation
Temperature regulation is based on the
return water from the system. The configured
set points refer to the temperature of the
return water. If, for example, the set point is
set at +30°C/86°F, a flow temperature of
35°C/95°F results.
System side circulation pump
The circuit board envisions an output for the
management of the circulation pump, always
on in COOLING and HEATING mode, switched
off with a delay of 1 minute from unit switch
off (stand-by).
Source side pump
The circuit board envisions an output for the
source side pump control (see pumps available
at configurator). The source side pump is
switched on before start up of the compressor
and switched off about 30 seconds after the
compressor is switched off.
Anti-freeze alarm
The anti-freeze function is only active if
the unit is ON or in stand-by.
In order to prevent breakage of the plate
heat exchanger due to freezing of the water
it contains, the micro processor envisions
the compressor blocking if the temperature
detected by the heat exchanger output probe
results less than +4°C/39,2°F.

CAN ONLY BE VARIED BY AN AUTHORISED



The intervention of this alarm determines
compressor and block but not of the pump,
which remains active.
Domestic hot water anti-freeze
The DHW anti-freeze function is only active if
it has an integration resource dedicated to the
storage of domestic hot water.
The integration resource is activated if the
temperature of the water detected by the
sanitary probe is less than +4°C/39,2°F and is
switched off at +7°C/44,6°F.
Wizard
To facilitate commissioning the unit, a start-up
procedure has been created. This procedure is
used upon the first start-up.
Supervision system
MODBUS
For other requirements, contact the head
office.
PGD1 GRAPHIC TERMINAL
• backlit
• LCD
• Icons to identify the type
of operation.
PGD1
8IWRLPY. 1403. 5890710_01

6. ACCESSORIES
• AER485P1: RS-485 interface for supervis-
ing systems with MODBUS protocol.
• VT: Anti-vibration mounts to be assem-
bled under the unit's sheet steel base.
• PGD1: Simplified remote panel. Allows
to perform the basic controls of the
unit with alarm signals. Can be con-
trolled from a max of 500 m with 2
PAIRS of TWISTED cable + SHIELD with
shielded pairs and TCONN6J000.
WRL 200 400 500
AER485P1 
VT
9 9 15
PGD1 
6.1. ACCESSORIES COMPATIBILITY TABLE
9
IWRLPY. 1403. 5890710_01

7. TECHNICAL DATA
7.1. 
Mod. WRL U.M. 200 400 500
Cooling capacity [1] ton 15,26 20,64 26,86
Input power kW 11,38 15,08 19,02
Evaporator water flow gpm 36,56 49,43 64,33
Evaporator pressure drop PSI 3,1 5,5 3,0
Condenser water flow gpm 45,99 61,97 80,25
Condenser pressure drop PSI 4,2 8,2 3,9
Heating capacity [2] BTU/h 198652 267625 344456
Input power kW 14,11 19,1 23,4
Condenser water flow gpm 44,09 59,40 76,45
Condenser pressure drop PSI 3,9 7,5 3,6
Evaporator water flow gpm 33,94 45,66 59,61
Evaporator pressure drop PSI 2,7 4,7 2,6
ENERGY INDEXES
EER BTU/W 16,12 16,44 16,96
COP W/W 4,13 4,11 4,31
AHRI PART LOAD RATINGS
IPLV W/W 21,06 21,47 22,16
EER (100% load) W/W 4,72 4,81 4,97
EER (75% load) W/W 5,60 5,71 5,89
EER (50% load) W/W 6,63 6,76 6,97
EER (25% load) W/W 6,54 6,67 6,88
ELECTRICAL DATA (230V-3-60Hz power supply “6”)
Input current (cooling) A 42 53 71
Input current (heating) A 47 62 83
No pump version
LRA A 222 276 357
MCA A 69 84 129
MOP A 100 121 186
Recommended fuse A 90 110 175
Only evaporator pump
LRA A 230 284 365
MCA A 77 91 136
MOP A 108 129 194
Recommended fuse A 100 125 175
Only condenser pump
LRA A 230 284 365
MCA A 77 91 136
MOP A 108 129 194
Recommended fuse A 100 125 175
Evap + cond pumps
LRA A 237 292 373
MCA A 85 99 144
MOP A 115 136 201
Recommended fuse A 110 125 200
In cooling operation [1]:
Evaporator:
Water outlet temperature............................ 6,7°C - 44°F
Water flow.................................................... 0,043l/s per kW - 2,4gpm/ton
.................................................................. 5,56K
Condenser:
Water inlet temperature ..............................29,4°C - 85°F
Water flow.................................................... 0,054l/s per kW - 3gmp/ton
.................................................................. 5,31K
Reference data (AHRI standard):
In heating operation [2]:
Evaporator:
Water inlet temperature ..............................10°C - 50°F
Water outlet temperature............................ 5°C - 41°F
.................................................................. 5K
Condenser:
Water inlet temperature ..............................40°C - 104°F
Water outlet temperature............................ 45°C - 113°F
.................................................................. 5K
10 IWRLPY. 1403. 5890710_01

Mod. WRL U.M. 200 400 500
ELECTRICAL DATA (460V-3-60Hz power supply “7”)
Input current (cooling) A 21 26 32
Input current (heating) A 23 31 38
No pump version
LRA A 116 147 177
MCA A 34 47 58
MOP A 49 67 83
Recommended fuse A 45 60 80
Only evaporator pump
LRA A 121 152 182
MCA A 39 52 63
MOP A 53 72 88
Recommended fuse A 50 70 80
Only condenser pump
LRA A 121 152 182
MCA A 39 52 63
MOP A 53 72 88
Recommended fuse A 50 70 80
Evap + cond pumps
LRA A 125 156 186
MCA A 43 56 67
MOP A 58 76 92
Recommended fuse A 50 75 90
ELECTRICAL DATA (575V-3-60Hz power supply “8”)
Input current (cooling) A 16 20 25
Input current (heating) A 18 24 29
No pump version
LRA A 90 96 133
MCA A 26 34 52
MOP A 37 48 74
Recommended fuse A 35 45 70
Only evaporator pump
LRA A 92 99 136
MCA A 28 37 55
MOP A 38 52 77
Recommended fuse A 35 50 70
Only condenser pump
LRA A 92 99 136
MCA A 28 37 55
MOP A 38 52 77
Recommended fuse A 35 50 70
Evap + cond pumps
LRA A 94 103 140
MCA A 29 41 59
MOP A 40 55 81
Recommended fuse A 40 50 80
In cooling operation [1]:
Evaporator:
Water outlet temperature............................ 6,7°C - 44°F
Water flow.................................................... 0,043l/s per kW - 2,4gpm/ton
.................................................................. 5,56K
Condenser:
Water inlet temperature ..............................29,4°C - 85°F
Water flow.................................................... 0,054l/s per kW - 3gmp/ton
.................................................................. 5,31K
Reference data (AHRI standard):
In heating operation [2]:
Evaporator:
Water inlet temperature ..............................10°C - 50°F
Water outlet temperature............................ 5°C - 41°F
.................................................................. 5K
Condenser:
Water inlet temperature ..............................40°C - 104°F
Water outlet temperature............................ 45°C - 113°F
.................................................................. 5K
11
IWRLPY. 1403. 5890710_01

Mod. WRL U.M. 200 400 500
CHARGE
Refrigerant R410A lb 3,9 3,9 5,7
Oil gal 1,0 1,8 1,8
COMPRESSORS
Quantity / Circuits - 2 / 1 2 / 1 2 / 1
Capacity control % 0/50/100 0/50/100 0/50/100
EVAPORATOR
Quantity n° 1 1 1
Water content l 11,7 11,7 15,1
Water connections (Victaulic) inch 2" 2" 2" 1/2
CONDENSER
Quantity - 1 1 1
Water content gal 3,4 3,4 4,4
Water connections (Victaulic) inch 2" 2" 2" 1/2

Recovered heating capacity (40/45°C) BTU/h 32514 52254 64515
Quantity - 1 1 1
Desuperheater water flow gpm 7,21 11,59 14,31
Desuperheater pressure drop PSI 0,1 0,2 0,2

Recovered heating capacity (40/45°C) BTU/h 44740 71311 87773
Condenser heating capacity BTU/h 154141 196618 257077
Quantity - 1 1 1
Desuperheater water flow gpm 9,92 15,81 19,46
Desuperheater pressure drop PSI 0,2 0,4 0,4
DESUPERHEATER DATA
Desuperheater MIN water flow gpm 3,08 3,08 3,74
Desuperheater MAX water flow gpm 74,85 74,85 74,85
Water connections (Victaulic) inch 1" 1/2 1" 1/2 1" 1/2

Input power @230/460V kW 2,2 2,2 2,2
Input power @575V kW 1,28 2,5 2,5
Input current @230V A 7,8 7,8 7,8
Input current @460V A 4,5 4,5 4,5
Input current @575V A 1,84 3,5 3,5
Available head @230/460V PSI 30,0 26,8 28,2
Available head @575V PSI 29,5 26,7 27,4

Input power @230/460V kW 2,2 2,2 2,2
Input power @575V kW 1,28 2,5 2,5
Input current @230V A 7,8 7,8 7,8
Input current @460V A 4,5 4,5 4,5
Input current @575V A 1,84 3,5 3,5
Available head @230/460V PSI 28,5 22,9 24,9
Available head @575V PSI 26,2 22,2 23,5
EXPANSION VESSEL
Expansion vessel n°/gal 1/2,1 1/2,1 1/3,2
Expansion vessel calibration PSI 21,8 21,8 21,8

Sound power dB(A) 78 82 83
Sound pressure dB(A) 46 50 51
DIMENSIONS
Hight mm 1380 1380 1380
inch 54,3 54,3 54,3
Width mm 845 845 845
inch 33,3 33,3 33,3
Lenght mm 1320 1320 2059
inch 52,0 52,0 81,1
Weight kg 349 411 560
lb 770,1 906,8 1234,5
SOUND POWER
Aermec determines sound power values on the basis of measurements
made in accordance with UNI EN ISO 9614-2, as required for Eurovent
certification.
SOUND PRESSURE
Sound pressure in free field, at 10m / 32,8ft distance from the external surface
of the unit (in accordance with UNI EN ISO 3744)
12 IWRLPY. 1403. 5890710_01

8. OPERATING LIMITS
8.1. OPERATING LIMITS STANDARD
VERSION
The 
on the evaporator and the condenser of 5K.
Condenser outlet

min: 5°C / 41°F
max: 22°C / 71,6°F
Evaporator outlet
inlet 
min: 3°C / 37,4°F
max: 10°C / 50°F
20
68
75
85
95
105
115
125
135
145
149
25
30
35
40
45
50
55
60
65
°F °C
-10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 22
14 15 20 25 30 35 40 45 50 55 60 65 70 71,6 °F
°C
Standard functioning / X
(for different temperature
contact the head office)
Operating
with glycol Y
EVAPORATOR WATER OUTLET TEMPERATURE
CONDENSER WATER OUTLET TEMPERATURE
STANDARD VERSION
-10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 22
14 15 20 25 30 35 40 45 50 55 60 65 70 71,6 °F
°C
20
68
75
85
95
105
115
125
135
145
149
25
30
35
40
45
50
55
60
65
°F °C
Standard functioning / X
(for different temperature
contact the head office)
Operating
with glycol Y
EVAPORATOR WATER OUTLET TEMPERATURE
CONDENSING TEMPERATURE
CONDENSERLESS VERSION
8.2. OPERATING LIMITS CONDENS
ERLESS VERSION

on the evaporator and the condenser of 5K.
Evaporator outlet

min: 3°C / 37,4°F
max: 10°C / 50°F
REFRIGERANT SIDE FOR WRL U.M. High pressure
side
Low pressure
side
Acceptable maximum pressure bar / PSI 45 / 653 29,5 / 428
Acceptable maximum temperature °C / °F 120 / 248 50 / 122
Acceptable minimum temperature °C / °F -30 / -22 -35 / -31
8.3. DESIGN DATA
13
IWRLPY. 1403. 5890710_01

9. 
9.1. COOLING CAPACITY AND INPUT
POWER
The refrigerating capacity yielded and the input
electrical capacity in conditions other than
rated conditions are obtained by multiplying
the rated values (Pc, Pa) by the respective
correction coefficients (Cf, Ca).
The diagram allows you to obtain the correc-
tion coefficients; corresponding to each curve,
the temperature of the hot processed water
referred to is reported, assuming a difference
in water temperature between the input and
output of the condenser equal to 5°C/10°F.
KEY:
Pc: Cooling capacity
Pa: Input power
Cf: Cooling capacity correction coefficient
Ca: Input power correction coefficient
KEY:
Pc: Cooling capacity
Pa: Input power
Cf: Cooling capacity correction coefficient
Ca: Input power correction coefficient
9.2. 
RATED VALUE

refer to Tab. “tDIFFERENT FROM NOMI
t for the cooling capacity and input
power correction factors.
9.3. FOULING FACTORS
The performance levels indicated in table:
”2refer to con-
ditions with clean tubes, with a fouling factor =
1. For values different from the fouling factor,
multiply the values in the performance table by
the reported coefficients.
Condenser output water temperature Δt 5K
Pc: Correcon Coefficients (Cooling Capacity)
86
30
0,4
0,5
0,6
0,7
0,8
0,9
1,0
1,1
1,2
1,3
1,4
32 34 36 38 40 42 44 46 48 50 52 54 56
F
E
D
C
B
A
°C
°F88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 132,8
34,7
94,5
A B C D E F
Condenser output
water temperature
°C -6 0 6,7 10 13 18
°F 21,2 32 44,1 50 55,4 64,4
COOLING CAPACITY
94,5
30
0,85
0,90
0,95
1,00
1,05
1,10
1,15
1,20
1,25
1,30
1,35
1,40
1,45
1,50
32 34 36 38 40 42 44 46 48 50 52 54 56
132,8 °F
°C
8686 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130
34,7
132
A
B
C
D
E
F
Condenser output water temperature Δt 5K
Pa: Correcon Coefficients (Input power)
A B C D E F
Condenser output
water temperature
°C -6 0 6,7 10 13 18
°F 21,2 32 44,1 50 55,4 64,4
INPUT POWER - COOLING MODE
tt
AT THE EVAPORATOR 3 5 8 10
Cooling capacity 0,99 1 1,02 1,03
Input power 0,99 1 1,01 1,02
Heating capacity 0,99 1 1,02 1,03
AL CONDENSER -5 10 15
Cooling capacity - 1 1,01 1,02
Input power - 1 0,99 0,98
Heating capacity the variations can be ignored
2
0,00001 0,00002 0,00005
Cooling capacity 1 0,99 0,98
Input power 1 1 1
Heating capacity 1 1 0,99
Input power 1 1 1,02
14 IWRLPY. 1403. 5890710_01

15
IWRLPY. 1403. 5890710_01
9.4. HEATING CAPACITY AND INPUT
POWER
The heating capacity yielded and the input
electrical capacity in conditions other than
rated conditions are obtained by multiplying
the rated values (Ph, Pa) by the respective
correction coefficients (Ch, Ca).
The diagram allows you to obtain the correc-
tion coefficients; corresponding to each curve,
the temperature of the hot processed water
referred to is reported, assuming a difference
in water temperature between the input and
output of the condenser equal to 5°C/10°F.
KEY:
Ph: Heating capacity
Pa: Input power
Ch: Heat capacity correction coefficient
Ca: Input power correction coefficient
9.5. 
RATED VALUE

“tt for
the cooling capacity and input power correc-
tion factors.
9.6. FOULING FACTORS
The performance levels indicated in table:
”2refer to con-
ditions with clean tubes, with a fouling factor =
1. For values different from the fouling factor,
multiply the values in the performance table by
the reported coefficients.
INPUT POWER - HEATING MODE
tt
AT THE EVAPORATOR 3 5 8 10
Cooling capacity 0,99 1 1,02 1,03
Input power 0,99 1 1,01 1,02
Heating capacity 0,99 1 1,02 1,03
AL CONDENSER -5 10 15
Cooling capacity - 1 1,01 1,02
Input power - 1 0,99 0,98
Heating capacity the variations can be ignored
2
0,00001 0,00002 0,00005
Cooling capacity 1 0,99 0,98
Input power 1 1 1
Heating capacity 1 1 0,99
Input power 1 1 1,02
A B C D E F
Condenser output
water temperature
°C -8 0 5 10 15 18
°F 17,6 32 41 50 59 64,4
A B C D E F
Condenser output
water temperature
°C -8 0 5 10 15 18
°F 17,6 32 41 50 59 64,4
25
0,6
0,7
0,8
0,9
1,0
1,1
1,2
1,3
1,4
1,5
30 35 40 45 50 55
77 80 85 90 95 100 105 110 115 20 125 131
°C
°F
130
Temperature of water produced at condenser Δt 5K
Ph: Correcon Coefficients (Heang Capacity)
F
E
D
C
B
A
25
0,60
0,65
0,70
0,75
0,80
0,85
0,90
0,95
1,00
1,05
1,10
1,15
1,20
27 29 31 33 35 37 39 41 43 45 47 49 51 53 55
77 80 85 90 95 100 105 110 115 120 125 130 131
A
B
C
D
E
F
Temperature of water produced at condenser Δt 5K
Pa: Correcon Coefficients (Input power)

9.8. COOLING CAPACITY AND INPUT
POWER
The heating capacity yielded in conditions
other than rated conditions are obtained by
multiplying the rated values (Ph, Pa) by the
respective correction coefficients (Cd). Diagram
(Tab. 8.10.1) allows you to obtain the correc-
tion coefficients; corresponding to each curve,
the temperature of the hot processed water re-
ferred to is reported, assuming a difference in
water temperature between the input and
output of the condenser equal to 5°C/10°F.
KEY:
Ph: Heating capacity
Pa: Input power
Cd: Desuperheater heating capacity
correction coefficient
9.9. 
RATED VALUE

refer to Tab. “tDIFFERENT FROM NOMI
t for the cooling capacity and input
power correction factors.
9.10. FOULING FACTORS
The performance levels indicated in table:
”2refer to con-
ditions with clean tubes, with a fouling factor =
1. For values different from the fouling factor,
multiply the values in the performance table by
the reported coefficients.
5040 41 43 45
122
°C
°F104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121
0,7
0,8
0,9
1,0
1,1
1,2
1,3
1,4
42 44 46 47 48 49
A
B
C
D
E
F
Temperature of water produced at Desuperheater Δt 5K
Cd: Water temperature at Condenser outlet
A B C D E F
Condenser output
water temperature
°C -6 0 6,7 10 13 18
°F 21,2 32 44,1 50 55,4 64,4
HEATING CAPACITY - DESUPERHEATER
tt
AT THE EVAPORATOR 3 5 8 10
Cooling capacity 0,99 1 1,02 1,03
Input power 0,99 1 1,01 1,02
Heating capacity 0,99 1 1,02 1,03
AL CONDENSER -5 10 15
Cooling capacity - 1 1,01 1,02
Input power - 1 0,99 0,98
Heating capacity the variations can be ignored
2
0,00001 0,00002 0,00005
Cooling capacity 1 0,99 0,98
Input power 1 1 1
Heating capacity 1 1 0,99
Input power 1 1 1,02
16 IWRLPY. 1403. 5890710_01

10. PRESSURE DROPS

WARNING: verify the calibration of the flow switch according to the system operating conditions.
The hydraulic circuit is protected by a safety valve calibrated at 6 bar.
EVAPORATOR
Average water temperature (°C / °F) 5/41 10/50 15/59 20/68 25/77 30/86 35/95
Multiplicative coefficient 1,02 1,00 0,98 0,97 0,96 0,95 0,94
EVAPORATOR PRESSURE DROP COOLING MODE FUNCTIONING
The diagram pressure drops are related to an average water temperature of 10 °C/50°F.
WATER FLOW RATE
PRESSURE DROPS
0
0
10
20
30
40
50
60
70
80
90
100
110
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
kPa
WRL 200-400
WRL 500
psi
5000 10000 15000 20000 25000 30000 35000
0 20 30 40 50 60 70 80 90 100 110 120 130 140 150 154 gpm10
l/h
CONDENSER
Average water temperature (°C / °F) 23/73,4 28/82,4 33/91,4 38/100,4 43/109,4 48/118,4 53/127,4 58/136,4
Multiplicative coefficient 1,02 1,01 1,00 0,99 0,98 0,97 0,96 0,95
CONDENSER PRESSURE DROP COOLING MODE FUNCTIONING
The diagram pressure drops are related to an average water temperature of 10 °C/50°F.
WATER FLOW RATE
PRESSURE DROPS
0
0
10
20
30
40
50
60
70
80
90
100
110
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
kPa
WRL 200-400
WRL 500
psi
5000 10000 15000 20000 25000 30000 35000
0 20 30 40 50 60 70 80 90 100 110 120 130 140 150 154 gpm10
l/h
Water flow rate MIN e MAX
WRL
Model u.m. MIN MAX
WRL 200 gpm 9,03 95,10
WRL 400 gpm 11,67 95,10
WRL 500 gpm 11,67 95,10
Water flow rate MIN e MAX
WRL
Model u.m. MIN MAX
WRL 200 gpm 7,71 95,10
WRL 400 gpm 7,71 95,10
WRL 500 gpm 7,71 95,10
ATTENTION
• Lower water flow speed might get some
substance deposited in the heat exchanger
• Higher water flow speed might cause
mechanical damages
ATTENTION
• Lower water flow speed might get some
substance deposited in the heat exchanger
• Higher water flow speed might cause
mechanical damages
17
IWRLPY. 1403. 5890710_01


WARNING: verify the calibration of the flow switch according to the system operating conditions.
The hydraulic circuit is protected by a safety valve calibrated at 6 bar.
DESUPERHEATER PRESSURE DROP COOLING MODE FUNCTIONING
The diagram pressure drops are related to an average water temperature of 10 °C/50°F.
WATER FLOW RATE
PRESSURE DROPS
0
0
5
1,0
0,5
10
15
2,2
kPa
PSI
2,0
1,5
0
1000 2000 3000 4000 5000 6000 7000 8000
0 5 10 15 20 25 30 35
l/h
gpm
WRL 200-400
WRL 500
DESUPERHEATER
Average water temperature (°C/°F) 23/73,4 28/82,4 33/91,4 38/100,4 43/109,4 48/118,4 53/127,4 58/136,4
Multiplicative coefficient 1,02 1,01 1,00 0,99 0,98 0,97 0,96 0,95
Water flow rate MIN e MAX “heating mode”
WRL
Model u.m. MIN MAX
WRL 200 gpm 3,08 74,85
WRL 400 gpm 3,08 74,85
WRL 500 gpm 3,08 74,85
The pressure drops in the charts refer to an
average water temperature of 50°C/122°F.
Shows the corrections on the table to apply to
the pressure drops with a variation in average
water temperature.
ATTENTION
• Lower water flow speed might get some
substance deposited in the heat exchanger
• Higher water flow speed might cause
mechanical damages
18 IWRLPY. 1403. 5890710_01

1
2
3
4
5
0
0
20
40
60
80
100
120
140
160
180
200
220
240
kPa
34,8
30
32
34
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
psi
5000 10000 15000 20000 25000 30000
0 10 20 30 40 50 60 70 80 90 100 110 120 130 132 gpm
l/h
EVAPORATOR USEFUL HEAD COOLING MODE FUNCTIONING
1WRL 200
WRL 400 230/460V
2WRL 500 230/460V
3WRL 200 575V
4WRL 400 575V
5WRL 500 575V
1
2
3
4
5
0
kPa
50005000 10000 15000 20000 25000 30000
0 10 20 30 40 50 60 70 80 90 100 110 120 130 132 gpm
l/h
0
20
40
60
80
100
120
140
160
180
200
220
240
34,8
30
32
34
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
psi
CONDENSER USEFUL HEAD COOLING MODE FUNCTIONING
1WRL 200
WRL 400 230/460V
2WRL 500 230/460V
3WRL 200 575V
4WRL 400 575V
5WRL 500 575V
19
IWRLPY. 1403. 5890710_01

11. MINIMUM/MAXIMUM WATER
CONTENT IN THE SYSTEM
12. EXPANSION VESSEL
CALIBRATION
The standard pressure pre-load value of the
expansion vessel is 1,5bar/21,8PSI, maximum
value is 6bar/87PSI.
The calibration of the vessel must be regulated
in accordance with the maximum level
difference (H) of the user (see diagram) using
the following formula:
p (calibration) [bar] = H [m] / 10.2 + 0.3.
For example: if level difference H
is equal to 20m/65,6ft, the calibration value of
the vessel will be 2,3bar/33,4PSI.
If the calibration value obtained from the
formula is less than 1,5bar/21,8PSI
(i.e. for H < 12.25), use the standard
calibration.
Reference operational conditions:
(1) Cooling: Max water temp. = 40°C/104°F, min water temp. = 4°C/39,2°F.
(2) Heating (heat pump): Max water temp. = 60°C/140°F, Min water temp. = 4°C/39,2°F.
KEY
(1) Check that highest installation is not higher than 55m/180,3ft.
(2) Ensure that lowest installation can withstand global pressure in that position.
WRL versions U.M. 200 400 500
Minimum water content in the system (standard). all gal/ton 6,50 6,50 6,50
Minimum water content in the system for process applications or operation with low load. all gal/ton 13,01 13,01 13,01

WRL PUMPVERSION U.M. 200 400 500
GEOTHERMAL SIDE EXPANSION VESSEL (standard in versions with pump)
Quantity
B
n°
111
U 1 1 1
F 1 1 1
I 1 1 1
Capacity - l/gal 8/2,1 8/2,1 12/3,2
SYSTEM SIDE EXPANSION VESSEL (standard in versions with pump)
Quantity Pn° 111
N 1 1 1
Capacity - l/gal 8/2,1 8/2,1 12/3,2
20 IWRLPY. 1403. 5890710_01