Broughton MCSe 7.3-21 User manual

MCSe 7.3
PORTABLE WATER COOLED AIR CONDITIONER.
PRODUCT MANUAL.
MCSe 7.3-21
SHEET 1 OF 17

TABLE OF CONTENTS
Warnings and important information-------------------------------------------P3-4 •
Technical specification--------------------------------------------------------------P4 •
System description-------------------------------------------------------------------P5 •
Installation-------------------------------------------------------------------------------P5.6&7 •
Operation---------------------------------------------------------------------------------P7-9 •
Adding Propylene Glycol-----------------------------------------------------------P10 •
Maintenance----------------------------------------------------------------------------P11-12 •
Spare parts------------------------------------------------------------------------------P13-15 •
Wiring diagrams-----------------------------------------------------------------------P16 •
Pump curves and data--------------------------------------------------------------P17 •
SHEET 2 OF 17

WARNINGS
These instructions should be read by:
The specifying engineer.
The installation engineer.
The user.
The service engineer.
Failure to follow these instructions may result in risk of personal injury or damage •
to the equipment.
Damage due to a failure to follow these instructions will invalidate the warranty. •
The appliance must be serviced by qualified engineers in compliance with local •
regulations.
The appliance must be switched off and disconnected from the power supply •
before any work is carried out.
There are no user controls inside the appliance casing. •
Do not place anything on top of the appliance. •
An air gap of at least 300mm should be allowed at the front of the unit to ensure •
a clear airflow.
Do not disconnect the appliance from the supply under load. •
For internal use only. Do not use out of doors. •
Extension cables should be correctly rated for the load,fully unwound and •
never run through water or over sharp edges.
Always transport and store in an upright position. •
The fan motor on the external heat exchanger is electronically controlled and is •
liable to start and stop without notice.
Maximum operating temperature 35 C . •
Minimum operating temperature 15 C . •
This is a class 1 appliance and must be Earthed. •
The system is supplied with a 'water only' test charge. To protect the system from •
corrosion and frost damage Propylene Glycol must be added prior to use.(See P??)
Damage due to the failure to add Propylene Glycol will invalidate the warranty.
Serious risk of injury! Do not support the exterior heat exchanger by means of the •
flexible lines.
The air-conditioning process produces condensate (water) during operation. •
This condensate is pumped away from the main unit along a flexible clear line
within the connecting hose assembly and is deposited to the outside from the
bottom of the exterior heat exchanger. Care should be taken when positioning
the exterior heat exchanger with regard to this.
SHEET 3 OF 17

WARNING.
Do not use means to accelerate the defrosting process or to clean, other than those recommended by the
manufacturer.
The appliance shall be stored in a room without continuously operating ignition sources (for example:
open flames, an operating gas appliance or an operating electric heater.
Do not pierce or burn.
Be aware that refrigerants may not contain an odour.
This appliance contains an A2L refrigerant classified as mildly flammable.
Always read the user and service manual before operation.
The minimal charge within the appliance does not require a minimum room
size for safe operation.
SHEET 4 OF 17

System description:
The system comprises a main indoor cooling unit, an external heat exchanger and a connecting
hose assembly.
The indoor cooling unit is fitted with an automatic condensate pump as standard.
The watercooled split system uses water as a medium to remove heat generated during the cooling
process to the external heat exchanger and then to the air. It is therefore important that the external
heat exchanger is not sited in the same area as the main indoor cooling unit.
The system has a minimum operating temperature of 15 C and a maximum operating temperature
of 35 C and comes fitted with a digital thermostat.
The watercooled split can run up to a maximum of 35m of connection hose. The external heat
exchanger should never be sited more than 5m vertically above the main unit.
Protection for the refrigeration system is provided by automatic high and low pressure safety switches
within the machine. The operation of these switches is indicated by lamps on the fascia panel.
(See page 9)
The appliance is fitted with an automatic defrost which will periodically stop the fan on the external
heat exchanger. This is indicated by the defrost lamp on the fascia panel.
During the normal cooling cycle the cooling lamp on the fascia panel will be illuminated.
The MCSe7.3 is a watercooled split portable air conditioning unit.
It is connected to a 13 Amp. 230Vac. 50Hz power supply and comes fitted with a fused uk moulded plug.
It is recommended that the supply to the machine should be protected by a 30mA RCD
Installation:
1:Connect the main cooling unit to the external heat exchanger and connect to the power
supply:
Site the main cooling unit and external heat exchanger in the desired locations. Ensure the locking
castors are engaged on the main unit before operation.
The main cooling unit, external heat exchanger and connecting hose assembly are fitted with auto-sealing
water connectors to minimise water loss during connection and disconnection. It should be noted that
a small amount water loss will occur.
The female water connectors have a sliding ring which must be pulled back to make the connection. This
will snap back into place once the connection has been made.(see page 7)
The water connectors are situated at the rear of the main cooling unit.
Fit the water connectors to the main unit. •
Fit the electrical connector to the main unit. •
Fit the clear condensate hose into the push-fit connector on the main unit. (see page 6) •
•
IT SHOULD BE NOTED THAT THE ELECTRICAL CONNECTORS ARE GENDER SPECIFIC AND WILL
ONLY CONNECT TO THE APPROPRIATE FITTINGS. PLEASE CHECK THE CORRECT PLUG IS
AT THE CORRECT END. TO DISCONNECT THE ELECTRICAL CONNECTORS DEPRESS THE GREY
LOCKING PIN AND WITHDRAW THE CONNECTOR.
Run the connecting hose assembly to the external heat exchanger in as smooth a run as possible, •
avoiding kinks and possible restrictions to water flow to a maximum of 35M.
Fit the water connectors to the external heat exchanger. •
Fit the electrical connector to the external heat exchanger. •
Fit the condensate clear hose to the hose on the external heat exchanger. •
MULTIPLE CONNECTION HOSE ASSEMBLIES CAN BE RUN IN SERIES SHOULD THIS BE REQUIRED
TO A MAXIMUM OF 35M.
TO AVOID LEAKS CHECK THAT ALL CONNECTIONS ARE FULLY HOME.
Connect the mains lead to the power supply and check that the power supply lamp is illuminated. •
SHEET 5 OF 17

Water
connectors.
Electrical
connector.
Push-fit
condensate hose
connector.
External heat
exchanger connection.
Water
connectors.
Electrical
connector.
Condensate hose.
to fit to main
cooling unit.
Electrical
connector.
Condensate hose
connector. Water connectors.
Electrical connector.
Condensate
hose
connector.
Water connectors.
Main cooling unit
External heat exchanger
Connection hose assembly.
Water and electrical connections:
SHEET 6 OF 17

Locking ring
Female connector
Turn the fan switch from 0 to 1 to start the fans on the main cooling unit. Set the fans to the desired •
speed using the rotary fan speed switch (Fast, medium or slow).
Turn the Cooling switch from 0 to 'I' to start the compressor and water pump. It should be noted that •
the compressor and pump will not start if the fans are not running. The compressor will not start if the
ambient temperature is below 15 C . The compressor is fitted with a start delay timer and will not run for
3 minutes from activation of the cooling switch. This device is designed to protect
the compressor from repeated start/stop cycles. The compressor delay is activated each time power
to the compressor is switched off, be that at the wall socket, the rocker switches or the thermostat.
Set the digital thermostat to the desired temperature (This is the 'set point'). During normal running •
the digital thermostat read-out shows the ambient temperature of the room.
(See P8 for setting the digital thermostat)
The MCSe7.3 is fitted with adjustable cold air louvres. Adjust these to your prefered angle. •
It should be noted that the appliance will start in defrost mode. •
Operation:
Male connector
1: Pull locking ring back.
2: Push connector fully home.
3: Release the locking ring.
4: Check the connection is secure.
Auto-sealing water connectors:
SHEET 7 OF 17

Setting the digital thermostat:
The set point is the minimum temperature the air-conditioner will operate down to. •
To see the set point push and immediately release the SET key: the display will •
show the set point value.
Push and immediately release the SET key or wait for 5 seconds to display the •
ambient room temperature.
How to see the set point:
The appliance comes factory set at 15 C . •
Push the SET key for more than 2 seconds to change the set point value. •
The value of the set point will be displayed and the " C" LED starts blinking. •
To change the set point value push the up or down arrows within 10 seconds. •
The minimum set point is 15 C.
To memorise the new set point value push SET key or wait for 10 seconds. •
How to change the set point:
Set key.
Up/ down
keys.
Power key.
(Not used)
Defrost key.
(Not used)
SHEET 8 OF 17

Power
supply
lamp.
Fan switch.
3 position
fan speed switch.
Digital
thermostat.
Cooling switch
Control panel:
Lamp fascia panel:
Cooling mode.
Defrost mode
Low pressure warning
High pressure warning
Cooling mode: This lamp will be illuminated during normal cooling when the compressor is running.
Defrost mode: This lamp will be illuminated during a defrost cycle when the external heat exchanger
fan will be switched off. The appliance will start in defrost mode before cooling commences.
Low pressure warning: This lamp will be illuminated if there is a loss of refrigerant gas. The machine should
not be operated if this lamp activates. This will automatically shut down the compressor.
High pressure warning: This lamp will be illuminated when the regrigeration system pressure is too high.
(see fault finding). This will automatically shut down the compressor.
SHEET 9 OF 17

Spring loaded nipple.
Filler cap.
Adding Propylene Glycol prior to first use:
1: Connect the connection hose assembly to the main cooling unit only.
2: Depress the spring loaded nipple on the male connector at the end on the hose
assembly into the base of a bucket or similar container.
3: Bleed approximately 2.5 litres of water into the bucket.
4: Remove the filler cap at the rear of the machine and add approximately 2.5 litres of
Propylene Glycol to the tank.
5: Ensure that the tank is not over filled. Over filling can cause excess water to be
expelled to the environment through the condensate pump.
6: The water tank is full when the fluid is approximately 100mm below the top of the
filler spout.
7: Replace the filler cap.
The appliance is now ready for installation and operation.
Ensure the machine is disconnected from the power supply before following this procedure.
Ensure that all local regulations are adhered to when using Propylene Glycol.
The water cooled split has a fluid capacity of approximately 10 litres when fitted with a
single 5M connection hose assembly.Each extra 5M hose assembly contains approximately
2.8 litres of water.
It is recommended that a 25% Glycol to 75% water mix is used. This can be increased to
50% when the external heat exchanger is located in a very cold environment.
Failure to add Glycol could result in costly damage to the machine and will invalidate the
warranty.
Male water connector.
Rear of main cooling unit.
SHEET 10 OF 17

Maintenance and upkeep:
Maintenance and service work should only be carried out by competent technicians with experience and
qualifications in the handling of A2L refrigerants.
The appliance should always be disconnected from the power supply before any work is carried out.
Before maintenance work is carried out all technicians should:
a) Carry out safety checks to ensure the risk of ignition is minimised.
b) Operate with controlled procedures to minimise the risk of flammable gas or vapour being present while
work is carried out.
c) Ensure all staff in the local area are instructed in the nature of the work being carried out.
d) Not work in confined spaces.
e) Check work areas with an appropriate leak detector prior to and during work to minimise the risk of
flammable atmospheres.
f) If any hot work is being carried out an appropriate fire extinguisher should be available to hand. Either
Co2 or dry powder.
g) All possible ignition sources should be kept sufficiently far away from the work area.
h) Adequate ventilation shall be provided when breaking into the refrigerant system. The ventilation should
safely disperse any released refrigerant to the external atmosphere.
i) When replacing electrical components only spare parts specified by the manufacturer shall be used.
j) Electrical work should be preceded with initial safety checks:
i) All capacitors need to be discharged in a manner that avoids sparks.
ii) No live electical components or wiring should be exposed while charging, recovering or purging the
system.
iii) There is continuity of earth bonding.
k) Under no circumstances should potential sources of ignition be used in the searching for or detection
of refrigerant leaks.
l) On discovery of a leak all refrigerant should be removed before a repair is carried out. The manufacturer
recommends purging the circuit with an inert gas before brazing.
m) Before charging ensure the refrigeration system is earthed.
SHEET 11 OF 17

1: Regularly check the fluid level in the water tank and top up if necessary.
2: Check and clean the evaporator and external heat exchanger coils. Build up of dust
and dirt can severly effect the performance of the machine. Clean with compressed air.
3: Regularly inspect the mains cable and plug for signs of damage or wear. Do not operate
the machine with a damaged mains cable.
4: Check that the castors are running freely and that the breaking mechanisms are working
correctly.
5: Inspect the connection hose assembly for signs of wear or damage. Replace if necessary.
Troubleshooting guide:
Routine checks:
SHEET 12 OF 17

24
23
26
27
29
36
35
34
33
13
12
10
9
8
4
6
20
5
1
19
18
17
11
16
21
22
15
14
3
7
2
37
30
28
25
32
MCWS250 Main cooling unit. Spare parts:
31
SHEET 13 OF 17

41
49
42
44
45
46
39
38
40
43
50
48
External heat exchanger. Spare parts:
SHEET 14 OF 17

Spare parts Cont'd:
SHEET 15 OF 17

Wiring diagram. Live circuit.
MCSe7.3-21
Wiring diagram. Neutral and Earth circuit.
MCSe7.3-21
SHEET 16 OF 17

QB70 water pump curve.
Condensate pump curve.
Condensate pump flow rates.(l/h).
SHEET 17 OF 17