York YLCA Manual

Air-condensed cooling units and heat
pumps YLCA / YLHA PLUS 5 to 27
Technical Information
Ref.: N-27722_EN 1110

Index
1Technical Information...............................................................................................................1
1.1 General Information.................................................................................................................2
1.1.1 Nomenclature...........................................................................................................................2
1.1.2 General description of the unit.................................................................................................2
1.1.3 Models available and capacities...............................................................................................3
1.1.4 Features and advantages.........................................................................................................4
1.1.5 Technical specifications...........................................................................................................5
1.2 Safety instructions....................................................................................................................9
1.3 Icons used in this document.....................................................................................................9
1.4 Instructions for storage, transport, loading and unloading of the unit....................................10
1.4.1 Inspection...............................................................................................................................10
1.4.2 Disposal of packaging............................................................................................................10
1.4.3 Disposal of the unit.................................................................................................................11
1.4.4 Handling.................................................................................................................................11
1.5 Selection guide (YLCA/YLHA)...............................................................................................11
1.5.1 Selection guide with glycol (cool only units)...........................................................................14
1.6 Technical data........................................................................................................................16
1.6.1 Limits of use...........................................................................................................................16
1.6.2 Correcting Factors..................................................................................................................16
1.6.3 Physical data..........................................................................................................................22
1.6.4 Electrical specifications..........................................................................................................24
1.7 Measurements, clearances and accesses.............................................................................25
1.7.1 Clearances.............................................................................................................................25
1.7.2 Dimensions and hydraulic connections␤(models YLCA/YLHA PLUS 5)................................27
1.7.3 Dimensions and hydraulic connections ␤(models YLCA/YLHA PLUS 7 and 9).....................28
1.7.4 Dimensions and hydraulic connections ␤(models YLCA/YLHA PLUS 12 and 15).................29
1.7.5 Dimensions and hydraulic connections ␤(models YLCA/YLHA PLUS 20 and 27).................30
1.8 Capacities YLHA....................................................................................................................31
1.8.1 Cooling capacities YLHA 5 ÷ 27.............................................................................................31
1.8.2 Cooling capacities YLHA 5 ÷ 27 (35% ethylene glycol).........................................................33
1.8.3 Heating capacities YLHA 5 ÷ 27.............................................................................................34
1.9 Capacities YLCA....................................................................................................................35
1.9.1 Cooling capacities YLCA 5 ÷ 27.............................................................................................35
1.9.2 Cooling capacities YLCA 5 ÷ 27 (35% ethylene glycol).........................................................36
1.10 Cooling operation and hydraulic diagrams.............................................................................37
1.10.1 YLCA models: cooling only....................................................................................................37
1.10.2 YLHA PLUS models: heat pump............................................................................................39
1.11 Instructions for installation and connection of the unit...........................................................42
1.11.1 Characteristics of the location................................................................................................42
1.11.2 Specifications for anchoring the unit......................................................................................43
1.11.3 Hydraulic connections............................................................................................................44
1.11.4 Rotational direction of Scroll compressors.............................................................................44
Index
i

1.11.5 Wiring diagrams..................................................................................................................... 45
1.12 Unit sound power spectrum data........................................................................................... 46
1.13 Operating instructions............................................................................................................ 47
1.13.1 Operating instructions µC2.....................................................................................................47
2Electric circuit diagrams......................................................................................................... 65
2.1 Electric circuit diagram YLCA/YLHA PLUS 5÷9 MC and M (230.1.50)..................................66
2.2 Electric circuit diagram YLCA/YLHA PLUS 12 MC and M (230.1.50)....................................68
2.3 Electric circuit diagram YLCA/YLHA PLUS 7 and 9 TC and T (400.3.50)............................. 70
2.4 Electric circuit diagram YLCA/YLHA PLUS 12 and 15 TC and T (400.3.50)......................... 72
2.5 Electric circuit diagram YLCA/YLHA PLUS 20 TC and T (400.3.50)..................................... 74
2.6 Electric circuit diagram YLCA 27 TC, YLHA PLUS 27 (400.3.50)..........................................76
2.7 Electric circuit diagram YLCA PLUS 5 ÷ 9 MCS (230.1.50) SOFT START........................... 78
2.8 Electric circuit diagram YLCA PLUS 12 MCS (230.1.50) SOFT START............................... 80
Index
ii

1
Technical Information

1.1 General Information
1.1.1 Nomenclature
Air-water cooling/heat pump with axial fans
Nominal cooling capacity in kW
R-410A version
M: Single-phase voltage (230.1.50)
T: Three-phase voltage (400.3.50)
With hydro kit
Soft Start
YLCA/YLHA PLUS 5 G1 T C S
1.1.2 General description of the unit
The YLCA/YLHA PLUS 5 to 27 units are high-performance air-water cooling units and heat pumps using
R-410A ecological coolant.
These units are designed for air conditioning or industrial applications that require cold or hot water.
They are silent and compact units, equipped with axial fans, that can be installed directly outdoors.
Inertia tanks are available as an optional extra for those installations requiring a greater volume of water.
The control system of these units is a specially programmed electronic controller for use with air-water
cooling units and heat pumps.
Easy to use and safe, these units precision-control the water return temperature of the installation, carry
out defrost cycles, modulate fan speeds and control compressor, pump and auxiliary electric heater start-
up. By reading the control probes and safety elements, the controller protects the entire equipment
against malfunctions. The system allows connecting the unit to a standard RS485 monitoring network.
For further information, please see
Operating instructions µC2, see on page 47 .
The YLCA/YLHA PLUS 5 to 27 units are made of proven quality components and manufactured in com‐
pliance with standards in force (ISO 9001 certification).
1Technical Information
1.1 General Information
2

1.1.3 Models available and capacities
Cool-only model YLCA 5 M YLCA 7 M and T YLCA 9 M and T YLCA 12 T
Cooling capacity 5,38 7,13 9,05 12,40
Cool-only model YLCA 15 T YLCA 20 T YLCA 27 T
Cooling capacity 14,5 19,52 25,60
Heat pump model YLHA PLUS 5 M YLHA PLUS 7 M and T YLHA PLUS 9 M and T
Cooling capacity 5,4 7,10 8,72
Heating capacity 6,3 7,16 10,1
Heat pump model YLHA PLUS 12 M
and T YLHA PLUS 15 T YLHA PLUS 20 T YLHA PLUS 27 T
Cooling capacity 11,75 13,8 19,4 25,8
12
Heating capacity 12,25 16,1 20,9 27,5
12,4
Cooling capacities in kW for 12/7 °C water inlet/outlet temperature and 35 °C ambient temperature.
Heating capacities in kW for 40/45 °C water inlet/outlet temperature and 7 °C ambient temperature.
Technical Information 1
General Information 1.1
3

1.1.4 Features and advantages
Features
• R-410A coolant
• Compact size
• Low height and weight
• Factory-tested equipment.
• Accessibility
• Easy maintenance
• Microprocessor for control and alarms
• Manufactured to ISO 9001
• Variable speed fan
• Option to omit inertia tank
• Connection for communications
Advantages
• Does not harm the ozone layer
• Minimum footprint
• Space for installing on terraces
• Operating quality control
• Easy maintenance
• Operator safety
• Easy and safe operation
• High quality level
• Low sound level and condensation control
• For installations with low water volume
• Ideal for building management
Dynamic Set Point and omission of inertia tank
The control system of the YLCA/YLHA PLUS 5 to 27 includes the Dynamic Set Point and Omission of
Inertia Tank.
Dynamic Set Point: Modifies the set point for the control of the water temperature according to the outdoor
temperature. The objective is to prevent an excessive difference in temperature between the interior and
exterior of the air-conditioned area. If there is a large difference, this may result in discomfort or thermal
shock for the users entering and leaving the area and could even endanger their health. In addition, this
function, which increases the set point during the summer cycle and reduces it in the winter cycle, sig‐
nificantly contributes to the system's energy savings.
Omission of inertia tank: This function increases the temperature differential which, when added to the
control set point, adjusts the stop/start cycles of the compressor when the unit is operating with a low
load. It uses the length of the compressor operating cycles as reference. Therefore, when the water
temperature falls quickly, it delays the stopping of the compressor by simulating the inertia tank function,
thus avoiding too many stop / start cycles of the unit. This function, although slightly reducing the accuracy
of the water temperature control, makes the use of the inertia tank unnecessary.
1Technical Information
1.1 General Information
4

1.1.5 Technical specifications
These units are supplied completely factory-assembled and with all coolant tubing and wiring ready for
installation on site. After mounting, these units must go through an operational test with water. Coolant
leaks will also be checked during this process.
Sheeting casing
The units are made of galvanized steel sheeting and anticorrosion nuts and bolts. Panels can be removed
for access to internal components. The casing parts are painted with white RAL9001 oven-baked poly‐
merized enamel.
Compressors
Hermetic Scroll compressors are used, mounted on anti-vibration supports. These compressors are
equipped with internal devices that protect them against high operating temperatures. The sump heaters
operate only when the compressor is inoperative.
Water side heat exchanger
Comprises a stainless steel plate exchanger, adequately insulated by a layer of closed-cell elastomer
foam. The coolant side of said exchanger accepts an operating pressure of 52 bar, whereas the water
side accepts 10 bar. When the unit includes a hydro kit, maximum admissible pressure on the water side
is 6 bar (adjustment of the tank safety valve).
Air side heat exchanger
Made up of two notched aluminium blue fin coils and grooved copper tubing mechanically expanded
within the fin assembly.
Fans
Of the axial and low sound level type. Equipped with single-phase motors with IP54 protection. These
motors allow speed control by means of a phase cut-out shifter controlled by the unit controller. This
allows unit operation at low ambient temperatures (-10°C). On cool only units with an optional low ambient
temperature kit can reach ‑18°C. On heat pumps, the fan will remain inoperative during defrosting.
Electrical and control panel
Located inside the machine, and with IP44 protection. The operating and control components are factory
mounted, wired and tested. This control panel is equipped with an external locking isolator that turns the
power supply off. Inside are the contactors for the compressor and the pump, the transformer, thermal
magnetic protectors, the speed control, connecting strip and the keyboard-display with the unit controls.
Control keyboard-display
This device is accessible through an external leak-tight plastic cover. This is an easy-to-use control with
three access levels: direct, user (password) and factory (password). For further information, please see
Operating instructions µC2, see on page 47 .
Cooling circuit
The cool only unit cooling circuit includes: Schrader valves on the high, low and liquid sides, expansion
valve, filter dryer, sight glass (YLCA 20 to 27), high and low pressure switches, service valves to isolate
the condenser (YLCA 27) and an expansion restrictor (YLCA 5 to 15).
The heat pump model includes: Schrader valves on the high, low and liquid sides, two expansion re‐
strictors (YLHA PLUS 5 to 15), two expansion valves, high and low pressure switches, dryer filter, sight
glass (YLHA PLUS 20 to 27), four-way valve (energised during the summer cycle and during defrost
cycles), check valves (YLHA PLUS 20 to 27), service valves for isolating the condenser (YLHA PLUS
27), an expansion valve for the heat cycle and a liquid vessel. The suction tubing is coated with closed-
cell elastomer.
Technical Information 1
General Information 1.1
5

Hydro kit (pack)
These units include a pack assembled with the components of a hydro kit. This assembly is located within
the unit frame and does not increase the footprint of same. It includes the following components: centri‐
fugal pump, expansion tank loaded with nitrogen at 1,5 bar, safety valve set to 6 bar, flow switch, air
bleed valve and drain valve. Also includes a mesh filter for the water circuit. This filter is supplied loose
for installation at the most convenient point.
Soft Start
The models YLHA PLUS 5, 7, 9 and 12 MCS have an electronic starter specially designed to limit the
starter intensity point in the single-phase Scroll compressors.
1Technical Information
1.1 General Information
6

Options and accessories
Remote control
Wall-mounted remote control unit with keyboard for cool/heat and ON/OFF functions. Includes power
supply, alarm and cool/heat LEDs. Maximum cable length: 50 m.
Remote terminal
For total access and control of the system by means of the display and buttons. It allows for selection of
cool, heat and off functions. Operating parameters can also be modified and the system can also be
supervised. Can be installed at a maximum distance of 1040 m.
BMS connections
By means of a serial board, it is possible to connect the system to a standard RS485 monitoring network.
Low ambient temperature kit (YLCA 5 to 15)
Includes a pressure transducer to control condensation pressure at low ambient temperatures (-18 °C).
This component is standard in models YLCA 20 to 27 and YLHA PLUS 5 to 27.
High pressure fans
Inertia tank
With or without built-in auxiliary heater.
Protecting grids
To protect the coils from possible impacts. Made of steel rods and painted with oven baked polymerized
white enamel (RAL9001).
NOTE
See specific documentation for options and accessories.
Technical Information 1
General Information 1.1
7

Antivibration supports
Whenever necessary to reduce vibrations and noise
produced by the unit to the maximum, a set of rubber
antivibration supports can be used. These should be
installed between the chassis support of the unit and
the base or floor on which it is to sit.
This base must be solid and dimensioned in accord‐
ance with the load to be supported.
Use 8/10MA bolts to fasten the supports to the base
of the chassis.
The antivibration support accessory includes 4 parts.
These spring supports should be distributed and fas‐
tened in the drilled holes at the base of the cooling
unit, the location of which is detailed in the sec‐
tion Measurements, clearances and accesses, see on
page 25 .
YLCA/YLHA PLUS 5 ÷ 15
11
15
65
90
24
30
8MA
YLCA/YLHA PLUS 20 ÷ 27
50
1Technical Information
1.1 General Information
8

1.2 Safety instructions
This document contains the necessary information for the safe and efficient transportation, assembly
and installation of the air conditioning unit. This guarantees the condition of the unit and its operating
safety.
Only an authorised company may assemble the air conditioning unit.
ATTENTION
Only authorised companies with the appropriate technical resources and suitably trained personnel may
install the air conditioning unit.
CAUTION
The specialists responsible for installing the air conditioning unit must make sure they have all of the
information and knowledge required to correctly install, test and deliver the unit. Johnson Controls Inc.
shall not be considered responsible for any damage caused by installation of the unit that is no consistent
with that described in this document or others specifically provided with the unit.
During regular equipment installation, the fitter must pay special attention to certain situations in order
to prevent injuries or damage to the unit.
Situations that could jeopardise the safety of the fitter or that of others nearby or that could put the unit
itself at risk are clearly indicated in this manual.
A series of special symbols are used to clearly identify these situations.
Pay careful attention to these symbols and to the messages following them, as your safety and the safety
of others depends on it.
1.3 Icons used in this document
DANGER
•The text following this symbol contains information and instructions relating directly to your safety
and physical wellbeing.
•Not taking these instructions into account could lead to serious, very serious or even fatal injuries to
you and others in the proximities of the unit.
Information can also be found on safe procedures during unit handling. This will help reduce the risk of
accidents.
CAUTION
•The text following this symbol contains information and instructions relating directly to your safety
and physical wellbeing.
•Not taking these instructions into account could lead to minor injuries to you and others in the prox‐
imities of the unit.
•Not taking these instructions into account could lead to unit damage.
Information can also be found on safe procedures during unit handling. This will help reduce the risk of
accidents.
NOTE
•The text following this symbol contains information or instructions that may be of use or that is worthy
of a more thorough explanation.
•Instructions regarding inspections to be made on unit parts or systems may also be included.
Technical Information 1
Safety instructions 1.2
9

1.4 Instructions for storage, transport, loading and unloading of
the unit
CAUTION
Outdoor units must be moved and stored vertically to prevent oil from leaking from the compressor.
Delivery inspection
The unit should be carefully inspected for visible damage or abnormalities as soon as it is received.
Any abnormalities or damage to the unit should be communicated to both the transportation and insur‐
ance company in writing.
Storage instructions
The unit should be stored in a place suitable to the purpose (warehouse or similar), protected from the
weather, water, humidity and dust.
Cover the unit with a canvas of a suitable size.
The unit should be appropriately protected from knocks and dust, ensuring the protective parts it was
supplied with remain in place. Where these are not in place, establish the necessary protections and/or
barriers to keep vehicles or fork-lift trucks away.
Transport, loading and unloading of the unit
The units should only be handled by personnel from the company responsible for their installation.
Transport of the unit should be in such a manner that no damage is caused by faulty or inadequate
mooring to the bed or body of the vehicle.
Where necessary, protect all of the edges of the unit against knocks and scratches and moor it to the
bed or body of the vehicle using suitable textile belts or slings to keep it perfectly still.
Loading and unloading the unit from a truck or trailer should be on flat, solid ground using an appropriate
crane with sufficient capacity.
1.4.1 Inspection
Upon reception, inspect the goods and notify the carrier and the insurance company, in writing, of any
possible damage during transportation.
1.4.2 Disposal of packaging
The packaging is recyclable. Dispose of it in the appropriate place or take it to an appropriate collection
centre. Respect the regulations in force for this type of waste in the country where the unit is being
installed.
Packaging remains must be correctly disposed of. Improper disposal of packaging generates environ‐
mental problems that affect human life.
1Technical Information
1.4 Instructions for storage, transport, loading and unloading of the unit
10

1.4.3 Disposal of the unit
When removing the unit, the components must be ecologically recovered. The cooling circuit is full of
coolant that must be extracted and delivered to the gas manufacturer for recycling.
ATTENTION
The refrigerant gas contains greenhouse-effect fluorinated gas covered by the Kyoto protocol.
Please see the specifications plate for type of gas and quantity per system.
GWP (Global Warning Potential): 2088
There will be oil left in the hermetic compressor, therefore it must be delivered with the circuit sealed.
The air conditioner shall be deposited in the area established by local authorities, to facilitate its selective
recovery.
1.4.4 Handling
The unit must be moved using the metal rails provided for its installation and transport
1.5 Selection guide (YLCA/YLHA)
Necessary information
The following information is needed to select a YLCA/YLHA water cooling unit:
1Cooling capacity needed
2Design cold water inlet and outlet temperatures.
3Design water flow rate, if one of the temperatures of Point 2 above is unknown.
4Design inlet temperature of air to the condenser. Normally, this will be the design ambient temperature
of summer air, unless influenced by the situation or other factors.
5Altitude above sea level.
6Design fouling factor of the evaporator.
NOTE
Points 1, 2 and 3 should be related by means of the following formulae:
Cooling capacity kW = l/h cold water x differential °C
860
Technical Information 1
Selection guide (YLCA/YLHA) 1.5
11

SELECTION EXAMPLE
A cooler is required to chill water from 13°C to 7°C, with a cooling capacity of 5 kW.
There are also other design conditions:
• Inlet ambient air in the condenser 35 °C
• Fouling factor: 0,044 m2 °C/kW
• Altitude: Sea level
From a quick glance at the table Cooling capacities YLCA 5 ÷ 27, see on page 35 it can be seen that
a YLCA 5 gives approximately the required capacity of 5,38 kW.
As the factors appearing in tables Fouling factors, see on page 16 and Altitude factors, see on page
19 are not applicable, the conditions will be as follows:
• Cooling capacity: 5,38 kW
• Power consumed: 1,87 kW
• Water temperature: 13°C to 7°C (Temp. difference of 6)
Water flow rate = 5,38 x 860 = 771 l/h
6
Available pressure in the unit's hydraulic circuit:
• From table Pressure available for the hydraulic circuit and pressure drop in the hydraulic circuit (with‐
out filter mounted), see on page 20 we infer that the YLCA 5 MC, with a flow rate of 771 l/h, has an
available pressure of 56 kPa.
Pressure drop in filter:
• From table Pressure drop in filters, see on page 21 we infer that with a flow rate of 771 l/h, there is
a pressure drop of 1,3 kPa.
YLHA PLUS selection method
1Establish the correct size of YLHA PLUS by selecting the model from the tables Heating capacities
YLHA 5 ÷ 27, see on page 34 and Cooling capacities YLCA 5 ÷ 27, see on page 35 that is closest
to the cooling and heating capacities required in design conditions of the water outlet temperature
and air inlet temperature.
2Apply fouling correction factors (table Fouling factors, see on page 16 ) and height correction factors
(table Altitude factors, see on page 19 ) to the capacity and power values shown in the corresponding
tables of capacity for the cool and heat modes. Make sure the corrected capacity is still sufficient for
your needs.
3Using the corrected capacities of the unit, select the design temperature differential or the flow rate.
4Check to make sure that these selections are within the YLCA/YLHA PLUS operating limits.
1Technical Information
1.5 Selection guide (YLCA/YLHA)
12

YLHA PLUS SELECTION EXAMPLE
A YLHA PLUS 5 heat pump operating at a 35 °C ambient temperature should cool water from 13 °C to
7 °C, with a 5 kW cooling capacity.
A 4 kW heating capacity is required in 0 °C design ambient temperature and a hot water outlet temper‐
ature of 45 °C.
The fouling factor is 0,044 m2 °C/kW, with the unit operating at sea level (no corrections). From a quick
glance at the tables Heating capacities YLHA 5 ÷ 27, see on page 34 and Cooling capacities YLCA 5
÷ 27, see on page 35 we see that a YLHA PLUS 5 heat pump approximately gives the required ca‐
pacities:
• Cooling capacity = 5,4 kW
• Total unit absorbed power = 1,91 kW
• Cold water temperature = 13 °C to 7 °C (temp. diff. of 6 °C)
• Hot and cold water flow rate = 774 l/h
• Heating capacity = 4,15 kW
• Total unit absorbed power in heat mode = 1,88 kW
• Hot water outlet temperature = 45 °C
Hot water temp. dif‐
ferential =4,15 x 860 = 4,60 °C
774
Thus, hot water return temperature is = 40,4 °C
All values are within operating limits:
• Available pressure in hydraulic circuit of a unit with pack:
• From table Pressure available for the hydraulic circuit and pressure drop in the hydraulic circuit (with‐
out filter mounted), see on page 20 we infer that the YLHA PLUS 5 MC, with a flow rate of 748 l/h,
has an available pressure of 56,5 kPa.
• Pressure drop in filter.
– From table Pressure drop in filters, see on page 21 , 1" filter, we infer that with a 748 l/h flow rate,
said filter has a pressure drop of 1,2 kPa.
Technical Information 1
Selection guide (YLCA/YLHA) 1.5
13

1.5.1 Selection guide with glycol (cool only units)
Necessary information
The following information is needed to select a YLCA cooling unit:
1Cooling capacity needed
2Design cold water/glycol inlet and outlet temperatures.
3Design water/glycol flow rate.
4Design inlet temperature of air to the condenser. Normally, this will be the design ambient temperature
of summer air, unless influenced by the situation or other factors.
5Altitude above sea level.
6Design fouling factor of the evaporator.
NOTE
Points 1, 2 and 3 should be related by means of the following formulae:
Capacity (kW) = Temp. diff. (°C) x Flow rate (litres/sec.)
Glycol factor
Temp. differential (°C) = Liquid Inlet Temp. ‑ Liquid Outlet Temp.
To determine the glycol factor, please see Glycol concentration and correcting tables, see on page
17 (Recommended ethylene glycol concentrations) for ethylene glycol or (Recommended propylene
glycol concentrations) for propylene glycol. For design outlet temperature, please see the recommended
glycol concentration and the glycol factor in this concentration. This is the minimum concentration to be
used for design outlet temperature. If a greater concentration is required, the glycol factor can be deter‐
mined by means of Glycol concentration and correcting tables, see on page 17 (Ethylene glycol in other
concentrations) or (Propylene glycol in other concentrations).
Selection method
1Determine the correct cooling unit model by selecting the one that is closest to the capacities required
by the design conditions of the glycol outlet and air inlet temperatures.
2Apply the fouling correcting factors that correspond to the fouling, altitude and glycol concentration
factor, to the capacity and power values in the capacity tables. Make sure the corrected capacity is
still sufficient for your needs.
3Using the corrected capacities of the cooler, set the design temperature range, or the flow rate, to
balance the formulae appearing in Selection guide (YLCA/YLHA), see on page 11 .
4Always recheck to make sure these selections are within the specified design limits.
Selection example
A cooler is required to chill ethylene glycol from 1 a to ‑4 °C, with an output of 3,5 kW.
The following design conditions are applicable:
• Fouling factor: 0,088m °C/kW
• Altitude: 1 200m
• Ambient air: 30 °C
• Glycol concentration: 30% w/w
For a ‑4 °C ethylene glycol outlet, the concentration recommended in Figure 1 is 30%. Therefore, the
specified concentration is appropriate.
From table
Cooling capacities YLCA 5 ÷ 27 (35% ethylene glycol), see on page 36 , we infer that a
YLCA 5 unit, at the established design conditions, gives a capacity of 3,4 kW and a consumption of 1,35
kW.
With the design fouling factor, use the capacity correcting factors x 0,987 and power x 0,995 (see Fouling
factors, see on page 16 ).
On design altitude, apply the capacity correcting factors x 10,973 and power x 1,020 (see Altitude fac‐
tors, see on page 19 ).
1Technical Information
1.5 Selection guide (YLCA/YLHA)
14

On design glycol concentration, apply the capacity correcting factors x 1,015 and power x 1,005
(see Correcting factors for other glycol concentrations, see on page 19 ).
Applying these factors to the selection: YLCA 5
Capacity = 3,44 x 0,987 x 0,973 x 1,015 = 3,35 kW
Comp. power = 1,35 x 0,995 x 1,020 x 1,005 = 1,37 kW
For the specified glycol concentration and a ‑4 °C outlet temperature, Figure 3 shows a 0,248 glycol
factor. Thus, the flow rate can be determined with the formula appearing in Selection guide (YLCA/
YLHA), see on page 11 .
3,35 [kW] = (1 ‑ (-4)) x Flow rate [l / s]
0,248
Flow rate =3,35 x 0,248 = 0,166 [l / s] or 598 [l / h]
5
This covers the Limits of Use.
The evaporator pressure drop can be determined by taking the water pressure drop value for a YLCA
unit and multiplying it by the correction factor (see Glycol concentration and correcting tables, see on
page 17 ) for a 30% concentration and an average temperature of ‑1,5 °C, i.e.:
-1,5 °C= 1 + (-4)
2
42 kPa x 1,22 = 51,2 kPa.
Technical Information 1
Selection guide (YLCA/YLHA) 1.5
15

1.6 Technical data
1.6.1 Limits of use
Model
Voltage limits Inlet air temperature to the
coil DB Water outlet temperature Temperature difference be‐
tween water outlet and inlet
Nominal at 400
Operating cycle Operating cycle
Minimum °C Maximum
°C Minimum °C Maximum °C
Minimum °C Maximum °C
Mini‐
mum
Maxi‐
mum Cold Hea tCold Hea tCold Heat Cold Heat
YLCA
342 436 -10(2)
-
46
-
5(1)
-
15
-
3 7
YLHA
PLUS -15 20 30 50(3)
(1) At lower water temperatures, it is advisable to use glycol-type antifreeze mixtures. Minimum
temp. with glycol ‑5 °C.
(2) -18 °C with low temperature (optional in models YLCA 5, 7, 9, 12, 15).
(3) 50 °C if the inlet air temp. is higher than 0 °C.
Prior to final approval of the installation
Check:
• Voltage remains between 342 ‑ 436 V.A.
CAUTION
The cable used for the unit power supply must be H05 RN ‑ F
• Power supply cable cross-section is at least as indicated in the corresponding wiring diagrams. The
cable used for the unit power supply must be H05 RN-F.
• Operating instructions have been given to the user.
• The warranty card has been filled out.
• Maintenance instructions have been given, or a regular maintenance contract has been signed.
1.6.2 Correcting Factors
Fouling factors
Evaporator
Fouling Factor m2 °C/kW Capacity factor compressor
absorbed power factor
0,044 1 1
0,088 0,987 0,995
0,176 0,964 0,985
0,352 0,926 0,962
1 Technical Information
1.6 Technical data
16

Glycol concentration and correcting tables
Recommended ethylene glycol concentrations
A% in weight a Recommended con‐
centration % in weight
BOutlet liquid temper‐
ature °C b Freeze point
C
Glycol factor L/S °C/
kW in recommended
concentrations
cGlycol factor in recom‐
mended concentrations
Ethylene glycol in other concentrations.
AGlycol factor
B Outlet liquid temperature °C
C Glycol factor
Recommended propylene glycol concentrations
A% in weight a Recommended concen‐
tration % in weight
BOutlet liquid temper‐
ature °C b Freeze point
C
Glycol factor L/S °C/
kW in recommended
concentrations
cGlycol factor in recom‐
mended concentrations
Aa
b
c
C
B
A C
B
a
b
c
Technical Information 1
Technical data 1.6
17