WOLSELEY Beermaster Plus Series User manual

wolseley.co.uk/climate
Beermaster Plus Cooling Range
Installation and
maintenance instructions

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2
Installation and maintenance
instructions
1. Introduction: Page 3
• Glossary Of Terms
• Health And Safety
• Before Installation
• During Installation & Maintenance
• Interconnecting Pipework
• Refrigerant
2. Planning The Installation: Page 4
• Positioning The Condensing Unit
• How To Gain Access To The Condensing Units
• Positioning The Evaporator
• How To Gain Access To The Evaporators
3. Installing The Units: Page 8
• Mounting The Condensing Unit On A Wall Bracket
• Mounting The Evaporator Unit On A Wall Bracket
4. Pipe Sizing: Page 9
• Using Interconnecting Pipe Sizing Charts
• Cellar Temperature 8°C
• Cellar Temperature 10°C
• Cellar Temperature 12°C
5. Pipework Installation - Supports And Routing: Page 10
6. Brazing: Page 11
7. Expansion Valve Phial Location: Page 11
8. Drainage: Page 11
9. Electrical Supply & Function: Page 12
• Cable Sizing
• Cable Connection / Termination
10. Power Entry To The Condensing Units: Page 12
11. Power Entry To The Evaporators: Page 13
12. Pressure Testing: Page 14
• Pressure Leak Test
13. Evacuation: Page 14
14. Refrigerant Charging: Page 14
15. Approximate Refrigeration Charge: Page 15
16. Commissioning: Page 16
• Final Checks
• Compressor Rotation
17. BMOP Functions: Page 16
18. BMIEP Functions: Page 19
19. Maintenance: Page 23
20. Standards Applied To The Product Range: Page 24
21. Noise Levels: Page 24
• BMOP
• BMEIP
22. Weights: Page 25
23. Sales Outlines: Page 26
24. Electrical: Page 31
25. Guarantee: Page 35

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1.Introduction
Glossary of terms
The following abbreviations and terms are used thorough the document and refer to the following:
BFC Beermaster Free Cooler
BMIEP Beermaster Indoor Evaporator Plus (also referred to as the evaporator)
BMOP Beermaster Outdoor Plus (also referred to as the Condensing Unit
FLC Full Load Current
HP High Pressure
LP Low Pressure
LRA Locked Rotor Amps
MCB Motor Circuit Breaker
PCB Printed Circuit Board
PPE Personal Protective Equipment
PRV Pressure Relief Valve
SWA Steel Wire Armoured (used to refer to steel wire armored cable)
TD Temperature Difference
TEV Thermal Expansion Valve
Health and safety
This document has been designed to help you and make the installation easier. Please read the points below to be familiar
with the units and the installation. This manual contains information on hazards that may be encountered when installing and
maintaining the equipment. It is therefore important that these instructions are followed. Upon receipt, the units should be
visually inspected, and the supplier notified of any damage or shortages within seven days from receipt of the unit. Care must
be taken when removing the packaging and during installation, to prevent the finished surfaces being damaged. Units are not
portable and are only for permanent installation.
CAUTION
All work on the unit must be carried out by qualified personnel only. The installation and maintenance manual
must always be kept with the unit. Ensure that the instruction manual is understood before installation. Ensure
working environment is suitable and any additional hazards caused or increased by the environment are given
appropriate consideration.
Use suitable PPE as per site regulations and as appropriate for the task. It is the responsibility of the person performing the task
and their employer to ensure that all necessary PPE is provided and worn. Detailed below is some of the suggested PPE that may
be required during installation and commissioning of the unit.
Head protection Foot protection Hand protection Eye protection
Before installation
Ensure that:
1. The voltage, working fluid and the maximum working pressures stated on the product nameplates are suitable for the
proposed working environment.
2. The units are to be operated solely for cellar type cooling applications and will be put into operation as per this manual.
3. The proposed method of mounting is adequate to support the total operational weight of the unit (including refrigerant
charge), which can be found on the unit nameplate.
4. The working environment is safe and suitable for the work required to install the product.

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700 mm
500 mm
500 mm
150 mm
1000 mm
During installation & maintenance
Ensure that:
1. The units are installed and maintained by qualified personnel only.
2. The electrical supply is isolated and secured from accidental re-connection whilst work is carried out on the equipment.
3. Electrical connections to the unit should be made in accordance with IET regulations as well as local laws and legislation.
Interconnecting pipework
Interconnecting refrigerant lines installed between the condensing unit and evaporator must be purged through with oxygen-free
nitrogen to remove any particles of dirt, debris or moisture, in accordance with good refrigeration practice. Failure to do so could
cause clogging or damage to the solenoid valve and expansion valve during operation.
Care should be taken when completing this to avoid any personal injury. Please note that Nitrogen is an asphyxiant and should
only be used in well-ventilated areas with appropriate procedures and mitigation measures in place to prevent harm.
Refrigerant
The system has been designed and certified when charged with R448a. Charging with R449a is also acceptable. Do not mix these
refrigerants in the same system.
2. Planning the installation
Positioning the condensing unit
To ensure optimum performance, the condensing unit should be situated to give uniform air distribution across the coil.
• Obstructions to airflow should be minimized.
• Coils should ideally be shaded from the sun.
• Consideration should also be given to servicing and airflow. Please see the diagram below.
• If units are roof mounted it is recommended that isolation material is used between the feet of the unit and the roof itself.
The unit should also be installed level and on a firm platform that is able to support the full weight of the unit, including
refrigerant.
• The location of the unit should take into account the minimum clearances, as detailed below.
A Clearance from the top of the unit
B Clearance from the back of the unit to the wall
C Clearance from the RHS of the unit to the wall
D Clearance from the LHS of the unit to the wall
E Clearance from the front of the unit to any other object

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Cooling
How to gain access to the condensing units
Loosen and remove all screws on the roof of the unit. Remove
and put aside the roof panel.
Loosen and remove all screws on the front two access panels.
Remove the front panel.
Rotate and slide the two side covers off the unit. The covers
will slide out of the from latches on the side of the unit and can
then be set to one side
CAUTION
The discharge line will be hot when the unit has
been running. This is indicated by a label. The
unit should be allowed to cool before accessing.
Possible Hot Discharge Pipe

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Positioning the evaporator
The evaporator has a “draw-through” airflow direction and is designed for either ceiling mounting or wall mounting.
For wall mounting, the wall mounting kit (optional) must be used and is supplied as a separate order.
Locate the evaporator in accordance with the minimum clearances as detailed below:
A Air Clearance
B Rear Clearance
C Left Hand Clearance
D Right Hand Clearance
2000 mm 275 mm
150 mm 150 mm

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Cooling
How to gain access to the condensing units
To gain access to the solenoid, filter and TEV, the end covers
will need to be removed. This can be done by loosening and
removing the screws. The end covers then slide out from unit.
To gain access to the controls and enable the installation
of the mains cable. The front controls facia will need to be
removed.
CAUTION
The plastic drain tray will need to be removed
before any brazing is carried out the pipework.
This can be done by removing the rear screws
and sliding the drain tray off the unit.
Once all panels have been removed, the following items:
1. TEV
2. Solenoid
3. Filter Drier
Can be accessed for servicing, maintenance and
superheat adjustment.
With the controls cover removed, the PCB board can
be accessed.

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Mounting the condensing unit on a
wall bracket
(Wolseley pt. no. 684222)
Assemble the angle brackets to the uprights using the M8
fixings provided and fix securely to the wall using suitable
wall fixings. (b) Lift the unit into position and fix at all 4 feet
positions with M8 fixings provided. (a)
• Check the intended wall is strong enough to support
the total operational weight of the unit, including the
refrigerant charge.
• The two brackets should be spaced according to the unit
size (e.g. 590mm for 1 fan unit). Please see the diagram at
the end of this section for the spacing requirements.
• Use the angled bracket with straight side against the wall,
to mark out the drilling positions. Ensure that the rails are
installed as Drill all holes for M8 or M10 fixings. (c) below
such that unit is mounted horizontally.
• Drill all holes for M8 or M10 fixings. (c)
• Use suitable wall fixings to securely fix the angle brackets
to the wall.
• Fix the rails to the angle brackets with the M8 fixings
provided. Fix at all 4 positions & tighten securely. (b)
• Screw in the M8 fittings into the rails leaving a gap between
the bolt and the bracket, so that the keyhole fastenings can
be positioned before tightening fully.
• Lift the evaporator unit into position with the 4 fixings
protruding through the keyhole slots. (a)
• Push the evaporator back so the fixings are firmly located
in the small end of the keyhole slots and tighten securely
at all 4 positions.
• Use a spirit level to ensure the unit is level in both
directions. Use spacers as required to ensure the fall of the
drain pan is maintained to the rear of the unit.
3. Installing the units
306
235
46
966
611
for M8 or M10
fixings
Use all fixings
6x 11  Holes
• Check the intended wall is strong enough to support
the total operational weight of the unit, including the
refrigerant charge.
• Use the straight upright rails to mark out the drilling
positions on the wall (c). Ensure the rails are vertically
aligned, parallel to each other and horizontally level to
each other. Space the rails at 966mm apart.
• Drill all holes for M8 or M10 fixings as appropriate.
Mounting the evaporator unit on a
wall bracket
(Wolseley pt. no. 684222)

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4. Pipe sizing
Pipework runs up to a maximum of 30m (total equivalent length) are recommend between the BMOP and BMIEP units. Each instal-
lation must be evaluated for the total equivalent pipe run length, including equivalent lengths for bends, additional fittings and
vertical lifts etc. Please refer to the appropriate interconnecting pipe sizing chart (tables below) for a full selection.
Using interconnecting pipe sizing charts
The pipework sizes below are based on the nominal duty of the BMIEP and BMOP combination, as shown in the tables. Pipework
should be selected based on the total equivalent run length of the interconnecting pipework between the two units, and not just
the dimensional length. Equivalent lengths for all bends, piping components and vertical rises should be added to the basic run
lengths to achieve the total equivalent run lengths. When using the tables to determine pipe length, round up the equivalent
length and do not interpolate between values. For example, if the pipe run is between 10m and 20m, always use the 20m values.
Cellar temperature 10°C
Evaporator bracket centres
CONDENSING UNIT EVAPORATOR
UNIT CELLAR TEMPERATURE 10OC
MODEL UNIT CONN MODEL 10m 20m 30m
SUCTION LIQUID SUCTION LIQUID SUCTION LIQUID SUCTION LIQUID
BMOP-130-1 3/4“ 3/8“ BMIEP-448-37 5/8" 3/8" 5/8" 3/8" 3/4" 3/8"
BMOP-150-1 3/4“ 3/8“ BMIEP-448-48 5/8" 3/8" 3/4" 3/8" 3/4" 3/8"
BMOP-190-1 3/4“ 3/8“ BMIEP-448-48 5/8" 3/8" 3/4" 3/8" 3/4" 3/8"
BMOP-210-1 7/8“ 1/2“ BMIEP-448-48 5/8" 3/8" 3/4" 3/8" 7/8" 3/8"
BMOP-210-1 7/8“ 1/2“ BMIE-448-69 5/8" 3/8" 3/4" 3/8" 7/8" 3/8"
BMOP-210-1 7/8“ 1/2“ BMIEP-448-89 3/4" 3/8" 3/4" 3/8" 7/8" 1/2"
BMOP-250 -1/3 7/8“ 1/2“ BMIEP-448-89 3/4" 3/8" 3/4" 3/8" 7/8" 1/2"
BMOP-320-1/3 7/8“ 1/2“ BMIEP-448-89 3/4" 3/8" 7/8" 1/2" 1.1/8" 1/2"
BMOP-350-3 7/8“ 1/2“ BMIEP-448-89 7/8" 3/8" 7/8" 1/2" 1.1/8" 1/2"
BMOP-360-3 7/8“ 1/2“ BMIEP-448-133 7/8" 1/2" 1.1/8" 1/2" 1.1/8" 1/2"

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5. Pipework installation - supports and routing
Pipework to and from the units should be selected to suit the application and not the
connection size of the unit. Pipework should be supported independently from the
condensing unit and evaporator in a way that prevents the transmission of vibration
between the units. The suction line must be insulated.
At the installer’s discretion, liquid and suction lines may be run and clamped resting
against each other and insulated within the same insulation tube. This would increase
sub-cooling and improve Evaporator performance. A maximum of 6m vertical lift is
allowed in the pipework. Any vertical lift of the suction line must be accommodated
with a ‘Swan Neck’ in the pipe work to assist in oil return and prevent liquid flood back
during off cycle. Please refer to the diagram to the right.
A refrigerant filter drier is fitted in the BMIEP unit’s inlet pipework. During installation,
it is important that the pipework is not left open to atmosphere for any longer than
necessary. This causes moisture to be absorbed by the drier and reduces its normal
system drying capacity. The pipework bungs should only be removed just before brazing
of the pipework.
6. Brazing
A suitably qualified engineer should carry out brazing to a high standard of refrigeration practice.The Engineer should
ensure that:
• The working area is adequately ventilated.
• Appropriate PPE is worn throughout the process.
• The evaporator drain tray is removed before brazing.
• Care should be taken to avoid any direct flames being applied to the casework, controls or any area away from that being
brazed.
• Care should be taken when using nitrogen. Nitrogen is an asphyxiant and should only be used in well-ventilated areas with
appropriate procedures and mitigation measures in place, to prevent harm.
As well as following the above and adhering to best health and safety practices, the engineer should ensure that the following
is carried out:
• All pipe cuts are clean, and any swarf is removed
• Dry nitrogen is purged through system during brazing to minimize oxidization.
• Wet rags are used on all components close to brazing operations, and heat shields are used to protect the units.

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7. Expansion valve phial location
A suitably sized thermostatic expansion valve (TEV) is fitted to the evaporator with an external equalizing line fitted to the
suction header. The expansion valve capillary line must be coiled but must not be clamped to the suction line pipework. The
expansion valve should be fitted to the suction stub once the interconnecting pipework has been installed.
Ensure the phial is positioned as per instructions below:
• 3 or 9 o’clock position for 1/2” & 5/8” pipe.
• 4 or 8 o’clock position for 3/4“size pipe and above.
• Do not mount the phial on the top or bottom of the pipe and
ensure the full length of the phial is in contact with the pipe. It
should not mounted across any uneven area such as where the
pipe has been swaged or brazed.
The diagram to the right illustrates this for clarity.
8. Drainage
The evaporator drain tray is fitted with a 3/4” BSP condensate connection. This MUST be connected to a trapped drain line system. It
is not acceptable to allow the condensate to drain directly to the cellar floor, due to the potential health and safety hazard.

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9. Electrical supply & function
CAUTION:
Both the condensing unit and evaporator should be fed from the same electrical supply. If this is not possible, it is
important to ensure that the electrical supplies are from the same phase. Failure to do so will result in a potential
of 415 Volts between the units. Always ensure that the electrical supply to the unit is isolated before opening any
panel or carrying out any work on electrical equipment.
Cable sizing
Cable sizes should be selected to suit the application, adhering to the latest IET 18th Addition BS7671:2018 Wiring Regulations.
It is recommended that SWA cable is used with the armor braiding suitably secured in the gland. The cable must also be termina-
ted and earthed correctly at its point of entry into the units. The BMIEP and BMOP unit power connections are suitable for cables
up to 4mm. For cables larger than this it is recommended that the larger incoming cable is terminated at a wall mounted junction
box or isolator close to the unit, and a reduced size cable is used to connect the junction box/isolator to the unit.
Cable connection / termination
There is no interconnecting wiring between the evaporator and condensing unit. They operate independently on a pump down
control system. All Evaporators and Single-phase Condensing units require a Live, Neutral and Earth supply. Three-phase conden-
sing units require a Three-Phase, Neutral and Earth supply. The electrical supply to the unit must be taken from correctly sized
main circuit breakers (motor rated) or fuse boxes, which correspond to the condensing unit, evaporator and evaporator heater
currents. Additional information can be found within this manual under the electrical section of this document.
10. Power entry to the condensing units
There are two power entry points marked by the RED circle. The BLUE circle shows the pipe connections.
Ensure any cables are routed clear of the compressor, pipework and crankcase heater to the mains isolator.
Mains Connection
Mains Isolation
Looking at the
back of the unit
Customer
Electrical Entry
Points
Rear of unit

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11. Power entry to the evaporators
The power entry points are on the back-left hand side of the evaporator, as shown circled below. The cable should be suitably
secured in a gland and earthed to the stud provided. The supply L & N cable cores should be routed into the control box via the
conical grommet, as shown circled below.
Power entry points
Conical grommet
For access to the control box, the 6 fascia display screws should be removed and the connecting lead to the fascia display should
be carefully disconnected. The supply L & N cores should be connected to the 2-way power terminal on the larger PCB, as shown.

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12. Pressure testing
Pressure leak test
Both condenser and evaporator units have been strength & leak tested, dehydrated and filled with a holding charge of “dry air”
during manufacture. After installation, the entire system should be leak tested before evacuation as follows:
• Pressurize the high-pressure side of the system with Nitrogen to the maximum R448A HP pressure of 25 barg.
CAUTION:
A PRV (set pressure of 27.5 Barg) is fitted and if over pressurized this will blow and will need replacement*
• Check the whole system for leaks, if a leak is found, release the test pressure and repair the leak, then repeat test from the
start.
*Warning: wear safety goggles when performing the leak testing, and ensure all unnecessary personnel are excluded
from the area*
*Warning: when leak testing with nitrogen, ensure that appropriate procedures and effective nitrogen detection precautions
are in place to prevent asphyxiation if nitrogen is released *
13. Evacuation
The entire system should be evacuated prior to charging as follows:
• Connect a gauge manifold to the 1/4” flare connections on each service valve. Check the service valves are fully back
seated to ensure the pipe and service connection is fully open.
• Connect a vacuum pump to the service port on the gauge manifold, and ensure all paths are open.
• Evacuate the system to below 225 microns (0.3 mbar). The pump should be isolated, and the system pressure monitored.
A rapid continuous rise in pressure would indicate a leak in the system.
• During the evacuation process, the crankcase heater should be turned on, by energizing the power supply to the unit.
*Warning: do not megger test or start the compressor whilst under a vacuum*
14. Refrigerant charging
It is good practice to charge the system immediately after evacuation. This system is designed for use with R448A as the
refrigerant and should only be used with R448A. As R448A is a blend, the system MUST always be charged with liquid and
never as a gas. While the unit is under vacuum, liquid can be charged into the liquid line via the Schrader point. The main
charging process should be completed during commissioning.
Depending on ambient conditions, it may not be possible to fully charge the system from vacuum. If necessary, additional charge
can be added whilst running the system close to normal operating conditions (as shown in the table below). The remaining charge
is added via the suction service Schroeder. The refrigerant must be added as a liquid to maintain the R448A composition, but no
liquid should be present in the suction line of the, compressor. Therefore, an additional pressure drop is required to ensure that
the liquid flashes into gas. This is achieved using a liquid expansion charging device, connected via a gauge set.

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HIGH SIDE LOW SIDE
Condensing 43° Evaporating 2°C Dew
Air On 32° Air On 10°C
TD 11K TD 8K
CONDENSING UNIT EVAPORATOR UNIT PIPE RUN - CHARGE IN KG
MODEL MODEL 10m 20m 30m
BMOP-130-1 BMIEP-448-37 2.1 2.7 3.3
BMOP-150-1 BMIEP-448-48 2.9 3.5 4.1
BMOP-190-1 BMIEP-448-48 3.0 3.6 4.2
BMOP-210-1 BMIEP-448-48 3.0 3.6 4.3
BMOP-210-1 BMIEP-448-69 2.9 3.5 4.2
BMOP-210-1 BMIEP-448-89 3.8 4.4 6.4
BMOP-250 -1/3 BMIEP-448-89 3.8 4.4 6.4
BMOP-320 -1/3 BMIEP-448-89 4.0 5.5 6.8
BMOP-350-3 BMIEP-448-89 4.2 5.7 7.0
BMOP-360-3 BMIEP-448-133 5.6 6.7 7.9
When the system is correctly charged, the sight glass should be almost free of bubbles and there should be an adequate (5-
6K) superheat at the compressor suction. Once the system is fully charged, check for stable conditions. The superheat for the
BMIEP evaporator expansion valve is factory set to 5K (approx.). After running for an hour, the superheat should be checked. If
adjustment is necessary, remove cap from expansion valve and adjust using small flathead screwdriver. Turning anticlockwise will
reduce the superheat. Changes should be made in maximum increments of ½ turns, with the system being allowed to settle for at
least 10 minutes after each adjustment has been made.
Once charged, if the unit is left with the power supply turned off, the crankcase heater should be switched on for a minimum of 3
hours before the system is run. This will ensure that the compressor pump is free from liquid refrigerant.
If a leak occurs in the system, the R448A blend may be altered and no longer to suitable for use, as a change in composition can
result in undesirable operation of the evaporator TEV. As a result, it is important to determine how much of the refrigerant charge
remains in the system. If more than two thirds (2/3) of the original charge remains, the system can be topped up with additional
R448A liquid refrigerant once the leak has been repaired. However, if less than thirds (2/3) of the original charge remains, the
remaining refrigerant must be removed from the system and is no longer suitable for use as R448A. This refrigerant should not be
reused and once the leak has been repaired, the system should be recharged with new R448A refrigerant.
15. Approximate refrigeration charge
The approximate recommended refrigerant charge is shown in the table below. This is calculated from the nominal pipe diameters
and standard conditions, this should be used as a guide only.

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16. Commissioning
Final checks
Prior to starting the system, final checks should be made to the wiring, ensuring all connections are correct and tight. Before
operating the units, check that all guards, motors, mountings and electrical covers are secure, and that all necessary terminal
block links are added/removed and that fans rotate freely.
Compressor rotation
Important: Scroll compressors will only compress in one rotational direction.
Three-phase compressors will rotate in either direction depending upon phasing of the power to T1, T2 and T3. Verify that the
compressor rotation is correct by checking the suction pressure drops and the discharge pressure rises when the compressor is
running. If the compressor rotation is incorrect, the compressor will be very noisy and current draw substantially reduced. Correct
the rotation by swapping over any two of the supply phases, if required.
17. BMOP functions
Fan speed controller BMOP
The Series P315PR Controllers are pressure-actuated controllers for electronically commutated motors, suitable for direct mount
applications. The P315PR Controllers are suitable for noncorrosive refrigerants under normal environmental conditions.
The Series P315PR is mounted directly to the Liquid line and controls the EC Fan based on the condensing pressure. It comes
pre-set at 14barg for optimal performance, but can be adjusted if need via the screw on the back of the device.
• Turning in the Clockwise direction will increase the condensing pressure
• Turing in the Anit-Clockwise direction will reduce the condensing pressure

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Cooling
HP/LP switches
The condensing unit HP and LP switches are located in the right-hand end of the housing. The device has been pre-set to the
conditions specified below.
Low pressure setting
On the suction side of the compressor, the low pressure settings stop the compressor when the pressure gets too low (lower
set-point) and restarts the compressor once the pressure has risen back to the upper set-point. These are managed by the
mechanical switch as an upper set-point and a differential setting, as below.
Lower set-point (cut-out pressure) = Upper set point (cut-in pressure) – differential.
The default settings are as below:
• Upper set-point = 5 barg
• Differential = 3 barg
This gives a default lower set-point of 2 barg.
High pressure setting
On the discharge side of the compressor, there is a high pressure trip which prevents the compressor from over-pressuring the
system. This will stop the compressor if the pressure gets too high and is set to the below set-point by default:
• High pressure trip setting = 25 barg
The high pressure switch has an automatic reset, which is set to restart the compressor at 4 barg below the trip pressure.
This differential is not adjustable.

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Isolation
The isolator for the BMOP can be found behide the isolator cover. Note this will only isolate the condensing unit, not the
evaporator. It is the installer‘s responsibility to decide to fit the cover or leave uncovered. If the isolation cover is used then
potentially an auxiliary emergency stop may need to be incorporated as part of the installation.
BMOP fan
The BMOP fan has an EC fan set and will vary its speed depending on the ambient temperature.
This is controlled via the fan speed controller.

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Cooling
18. BMIEP functions
Electronic controller
The BMIEP controller has a setpoint operating range of 4 to 32°C (Normal operation range 10-13°C.) For operating temperatures below
8°C, a defrost sensor should be fitted (Wolseley pt. no. 684226). For more information on this, please see the section below on defrost.
The controller has two LEDS that indicate controller state, as described below.
There is a 5-minute anti-cycle timer that is used to protect the compressor from excessive starting/stopping. The anti-cycle
timer is operational immediately on power up and prevents the compressor from starting within the first 5 minutes of the unit
being turned on.
Controller set-point adjustment
There are two buttons for operating the controller. To adjust the set point,
• Press both left and right button simultaneously for 5 seconds to enter “set” mode. The 2 LEDs should illuminate, and the
display should flash when in “set” mode.
• Left button is used to reduce the set point.
• Right button is used to increase the set point.
Controller operation
• In “set” mode, cooling and heater are disabled and the anti-cycle timer is reset inhibiting cooling for 5 minutes.
• “Control” mode is re-established if no button is pressed for 3 seconds and revised set point is accepted.
• In “control” mode, the display shows the actual cellar temperature.
• The temperature set point is the only adjustable parameter.
Defrost
Important: ensure that energy saving mode is disabled in order to use defrost. As per below on evaporator energy saving this
means that the relevant jumper must be in the ‘C’ position. Please see on evaporator energy saving for instructions on how to
change this.
To enable cooling below 8°C, an additional sensor is required to sense the evaporator coil temperature. With this additional
defrost sensor in place the setpoint can be lowered below 8°C.
The secondary sensor should be fitted into the bottom part of the evaporator coil (defrost sensor). It should be inserted between
two fins on the air-on side and pushed firmly into the coil. The two fins should be closed around the sensor to keep it in position.
When this second sensor is fitted, the controller will initiate an off cycle defrost every 60 minutes. During defrost, cooling is
stopped and all the fans are running. The controller will indicate this by both LEDs being on. Defrost is terminated after 30
minutes or if the defrost sensor temperature rises above “set point +1°C”. The evaporator coil should be inspected after initially
running for 12 to 24 hours. If any ice has built up, the defrost sensor should be relocated to (or near to) where the ice formed. The
coil should be fully defrosted before continuing. The defrost regime is not adjustable.
• Cooling is switched on when the cellar temperature
is 2°C above the set point. (Top LED on)
• Heating is switched on when the cellar temperature
is 3°C below the set-point. (Bottom LED on)
• Defrost enabled (Two LEDs on)
• Cooling is switched off when the cellar temperature
is 1°C below the set point. (No LEDs on)
• Heating is switched off when the cellar temperature
is at the set-point temperature (No LEDs on)

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Controller alarm output & fault signals
If the cellar temperature is outside the acceptable range of -1 or +2°C from the set point temperature for 30 minutes, the alarm
will be initiated. The alarm will automatically reset once the cellar temperature is back within this acceptable control band. A 12
vdc relay can be connected between the Alarm signal and the ‘+12 vdc’ connections on the top 6-way connector to energise alarm
sirens and/or lamps. The relay-operating coil must be rated at 12 vdc with a maximum current of 50mA.
If either the air or defrost sensor fails, the display will flash a fault signal alternating with the cellar temperature.
The signal will latch and will not reset until the power is reset. Fault signals are: -
• P1/OC = Air sensor Open Circuit,
• P1/SC = Air sensor Short Circuit,
• P2/OC = Defrost sensor Open Circuit,
• P2/SC = Defrost sensor Short Circuit,
If a defrost sensor fault occurs, the setpoint will be limited to a minimum of 8°C until the fault is resolved, even if it has been set
lower. If an air sensor fault occurs, the heating and cooling functions are disabled.
Evaporator energy saving
The BMIEP controller, when supplied, is set to energy saving mode. This means that the controller is set to run only the first fan
when off cycle or in heating mode. As a result, this significantly reduces energy consumption (where there are multiple fans). In
order for the controller to allow multiple fans to run in the off cycle mode, energy saving mode must be disabled.
NOTE: This will increase energy consumption
Energy saving mode is enabled/disabled by moving the relevant jumper between ‘S’ and ‘C’ options, as below.
• Having the jumper in the S position (right-hand position) means that energy saving is enabled
• Having the jumper in the C position (left-hand position) means that energy saving is disabled
Note: Energy saving mode should not be used in conjunction with off cycle defrost
The controller can be set to have both fans running in the off-cycle mode if required by following the steps below to disable
energy saving mode.
• Turn off and isolate the power to the BMIEP unit.
• Remove the front cover from the control’s facia.
• Find the small jumper labelled C and S. It is located to the left of the earth screw, as per the diagram below.
• Move the jumper to the left-hand two pins marked ‘C’.
• Replace the front cover of the control’s facia.
Please note that these modes are only applicable on units with multiple fans. If the unit only has one fan, changing the jumper
between S and C settings will not impact operation or the energy consumption.
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