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heatingthroughinnovation.
Installation, Operating, Maintenance
and After Sales Manual.
Product Serial Number:
Please leave this manual with the end user.
Part Number: 1370057
Issue 5
LO-LINE RC & LO-LINE RC Heater/Cooler
Models: 6-4, 9-6, 14-10, 19-15
01.06.2011 ISSUE 5
Page 2
1.0 General Information 03
2.0 Heating System Design 03
3.0 Unit Selection/Sizing 03
4.0 Location 03
5.0 Preparation 04
6.0 Fixing 04
7.0 Water Connections 05
8.0 Electrical Connection 06
9.0 Commissioning Procedure 06
10.0 Technical Data 08
11.0 Operating Instructions 09
12.0 Troubleshooting 10
13.0 Maintenance 11
Contents
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03
LO-LINE RC & LO-LINE RC Heater/Cooler
1.0 General Information
2.0 Heating System Design
l This MYSON LO-LINE fan convector is designed for wall
mounted installation with a minimum installation height of
150mm to the underside of the unit.
l The LO-LINE should only be used on closed circulation, two
pipe, pump assisted central heating systems (LO-LINE) or
heating and cooling systems (LO-LINE Heater/Cooler).
l The LO-LINE Heater and Heater/Cooler can be used on heat
pump systems.
l The minimum side clearance is 100mm.
l The maximum ceiling height is 3m.
l Before proceeding with the installation, the heating system
design must be considered and the unit correctly sized to
meet the heat loss requirements of the room at normal fan
speed.
l This unit is supplied with an infra red remote control system
and has 3 operating modes -
Automatic – the desired room temperature is programmed in
to the unit and the fan speed is automatically adjusted until
the desired room temperature is achieved.
Fan only – allows user selection of any of the 3 available fan
speeds irrespective of room temperature or water temperature
in the coil.
Fan only with water temperature control – allows the user to
select any of the available fan speeds, which will operate only
if the water temperature in the coil is above 32C. This enables
control of the unit via an externally mounted room thermostat
if desired.
l This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety.
Children should be supervised to ensure they do not play with
the appliance.
This fan convector must be fitted on a two pipe, pumped
circulation heating system.
For optimum fan convector heating performance the system
must be capable of providing sufficient hot water through the
heat exchanger. This means that:
1. The minimum pipe size from boiler to fan convector must be
15mm.
2. This unit is not suitable for use on microbore pipe-work.
3. Where the unit is fitted on to a system with other emitters a
separate circuit for the fan convector should be considered
to provide adequate water flow.
4. The system water must be above 32°C for heating mode.
5. For heat pump applications - see Commissioning Procedure
6. This unit is NOT suitable for one-pipe systems.
7. Optimum performance will require effective balancing of
the whole system.
8. This unit must not be used to replace a radiator in an
existing system unless an adequate flow of water through
the unit can be guaranteed.
3.0 Unit Selection/Sizing
Heat output performance is given in the Technical Data section
of this manual. Outputs are shown for the three fan speeds,
however, it is important to size the unit to match the calculated
heat loss requirements of the room with the unit operating on
the low fan speed. The higher fan speeds are used in automatic
mode when the room temperature is significantly lower than the
preset temperature.
When establishing the temperature difference, ie mean water to
room temperature, allowance should be made for temperature
drop in the system. It is the water temperature of the unit which
dictates the output.
4.0 Location
l This LO-LINE unit may be fitted to any convenient wall at a
height from floor level that suits the application, providing an
unimpeded flow of warm air into the area to be heated.
l The minimum distance from the underside of the unit to floor
level is 150mm.
l The unit should be mounted on a flat wall, and stud or
partition walls should be avoided to minimise the possibility
of noise transmission.
l For cooling applications, the need for disposal of condensate
may influence the position of the unit.
1.02.03.04.0
This unit MUST NOT be installed in a bathroom or other similar high humidity area.
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04
LO-LINE RC & LO-LINE RC Heater/Cooler
5.0 Preparation
Before proceeding with the installation, unpack the carton
contents and check against the checklist below:
1. LO-LINE or LO-LINE Heater/Cooler unit.
2. 15mm isolating valves (1 pair).
3. Instruction manual.
4. Warranty card.
5. Fixing kit (rubber mounts and cable gland).
6. Remote control handset.
6.0 Fixing
Remove the outer casing as follows:
l Remove the 2 screws from the underside of the unit (see fig. 2).
l Lift off the outer case.
l Fit chassis on to the top two mounting screws and tighten.
l Secure the bottom two fixing points with the remaining two
screws.
Unit A B C
Dimensions (mm)
19-15 1138 1018 974
14-10 854 733 689
9-6 645 526 481
6-4 523 404 359
Cover Fixing Screws
Fig. 2 Case fixing screw positions
B
C
100
150
A
385
62
107
247
58
56
min each
side
min
Fig. 1
l Using the fixing dimensions (see fig. 1), mark the fixing hole
positions on the wall.
l Drill and plug the wall for No. 8 x 40mm round head wood
screws ensuring that the wall plugs are suitable for the wall
type.
l Remove the backing from two of the self-adhesive washers
and place on two of the screws with adhesive side towards
the point.
l Tighten the screws into the top two fixing holes leaving about
9mm projecting.
l Press adhesive washers to the wall.
l Remove the backing from the other two self-adhesive
washers and place centrally over the bottom two fixing holes.
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05
LO-LINE RC & LO-LINE RC Heater/Cooler
7.0 Water Connections
l Connect unit to system flow and return pipes using the two
15mm isolating valves (see fig. 3).
Note: To ensure effective venting of the heat exchanger the flow
pipe should be connected to the bottom connection of the heat
exchanger.
Note: For LO-LINE installations pipe-work must not be routed
directly underneath the unit as this will adversely affect the
operation of the integral room thermostat. If this cannot be
avoided, the pipe-work must be boxed to prevent heat rise.
l Ensure system is flushed in accordance with recognised best
practice and a suitable inhibitor is added to the system as
necessary.
l Open valves fully, check pipe connections for leaks and vent
the heat exchanger - see Commissioning Procedure.
LO-LINE Heater/Cooler installations with chilled water will
require provision for condensate disposal in accordance with any
local regulations.
A drain tray is fitted for condensate collection within the unit.
This should be connected to a 15mm drain pipe.
Note: External pipe-work carrying chilled water must be
insulated. Use a suitable sealant as necessary to ensure that
condensate does not spill or leak. Once connection to the
system flow and return pipes is made, any exposed internal
15mm pipework and isolating valves must be insulated.
57
99
68
191
72
99
57
130
Fig. 3
5.0
6.07.0
Page 6
06
LO-LINE RC & LO-LINE RC Heater/Cooler
8.0 Electrical Connection
WARNING: This appliance must be earthed. The electrical installation must comply with local or national
wiring regulations.
O O
LN
Motor
Power Board
Control Board
Air Sensor
Water Sensor
O O
Brown
Blue
White
Yellow
Wiring Diagram
9.0 Commissioning Procedure
l Fill and vent the system.
l Open both valves fully and vent air from the heat exchanger
by unscrewing the air bleed valve situated above the valves in
the angled top of the chassis.
l Check for leaks at pipe connections.
l Refit the outer case and secure using the 2 fixing screws.
l Switch on electrical supply.
l Check the operation of the unit in automatic and manual
modes (LO-LINE) or heating and cooling modes (LO-LINE
Heater/Cooler) by following the operating instructions.
l When installation and commissioning are complete, hand over
instruction manual to end-user.
l This unit is supplied with factory fitted test leads. Remove
these and discard.
l A fused electrical spur with a maximum 3A fuse and a switch
having 3mm separation on all poles must be provided in an
easily accessible position adjacent to the unit.
l Electrical cable entry to the unit should be made through the
underside of the unit using the cable gland provided, or
through the hole provided at the upper right hand corner of
the chassis.
l Connect live and neutral wires to the power board terminal
connections, and the earth wire to the chassis earth terminal.
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LO-LINE RC & LO-LINE RC Heater/Cooler
9.0 Commissioning Procedure (continued...)
Heat Pump and Low Water Temperature Systems
In heating mode, the control system brings the fan on when the
water in the coil reaches 32°C. For low water temperature systems,
eg heat pump systems, it is possible to switch off the boost speed
option in automatic mode so that the unit runs in medium or normal
fan speeds depending on demand. This means low outlet air
temperatures from the unit are avoided when the room temperature
is low in relation to the set temperature.
This facility can be switched on or off by following the instruction
below
l Isolate electrical supply.
l Remove outer cover.
l Change switch 1 position according to requirements
(see fig. 4).
l Refit outer cover.
l Switch on electrical supply.
Displayed Temperature Calibration
Depending on the location of the unit there may be a difference
between the temperature at the unit and the temperature in the
middle of the room being heated.
The displayed temperature calibration function enables
calibration in heating mode of the displayed temperature to the
actual room temperature using the following procedure:
l Run the fan convector until room conditions stabilise.
l Press the ‘On/Off’ key and ‘+’ key for 5 seconds (the display
will flash, alternating between ‘ro’ and the calibration
temperature.
l Calibrate the displayed room temperature by using the
‘+’ and ‘-’ keys with the fan running.
l Press the ‘On/Off’ key to finish
Fan Pulse
Fan pulse mode causes room air to be drawn over the air
temperature sensor periodically to maintain room temperatures
more effectively. In certain circumstances, for example when
units are over-sized in relation to the heat loss of the room, it
may be necessary to turn off this function. Use dipswitch 3
according to requirements.
Dipswitches
Fig. 4
Switch Switch Down Switch Up
1 Auto Fan Speed Selection 2 Speed 3 Speed
2 Heating / Cooling Heating Heating & Cooling
3 Fan Pulse Off On
4 Temperature Display °F °C
8.09.0
Page 8
Tested in accordance with BS 4856 Part 1.
Flow rate 340 ltr/h (75 gal/h).
Flow Rate Correction Factors:
455 ltr/h (100 gal/h) multiply by 1.06.
227 ltr/h (50 gal/h) multiply by 0.96.
113 ltr/h (25 gal/h) multiply by 0.85.
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LO-LINE RC & LO-LINE RC Heater/Cooler
10.0 Technical Data
Heating Performance Data
Model Fan Speed
Heat Output (watts)
Temperature Difference (°C)
Heat Output (Btu/h)
Temperature Difference (°F)
2921 3268 3613 3956 4298 4639
3351 3748 4144 4538 4930 5321
3751 4197 4640 5081 5520 5957
1922 2150 2377 2603 2828 3052
2367 2648 2928 3206 3483 3759
2803 3136 3467 3796 4125 4451
1098 1228 1357 1486 1617 1743
1437 1608 1777 1945 2114 2282
1811 2026 2240 2453 2665 2875
741 829 916 1003 1090 1176
843 943 1043 1142 1240 1339
1162 1300 1437 1574 1710 1845
Normal
Medium
Boost
Normal
Medium
Boost
Normal
Medium
Boost
Normal
Medium
Boost
19-15
14-10
9-6
6-4
9970 11154 12331 13503 14670 15832
11436 12783 14144 15488 16826 18159
12803 14323 15836 17340 18839 20331
6559 7338 8113 8884 9652 10416
8080 9039 9993 10943 11889 12831
9567 10703 11833 12957 14077 15192
3748 4191 4633 5073 5519 5948
4904 5486 6066 6642 7216 7788
6182 6916 7645 8372 9096 9816
2528 2829 3127 3424 3720 4015
2877 3218 3558 3896 4233 4568
3965 4436 4905 5371 5836 6297
40° 45° 50° 55° 60° 65° 72° 81° 90° 99° 108° 117°
Cooling Performance Data
Noise Levels
Model Fan Speed
Cooling Performance (watts)
Air-Mean Water Temperature Difference (°C)
Cooling Performance (Btu/h)
Air-Mean Water Temperature Difference (°F)
1340 1104 2002 1345 2734 1452
1464 1203 2187 1511 2987 1632
1533 1305 2291 1656 3128 1725
877 754 1310 969 1788 1034
1032 878 1542 1113 2106 1159
1228 1052 1835 1347 2505 1427
499 423 745 535 1018 553
600 507 896 639 1223 655
710 581 1061 770 1448 957
321 277 480 357 655 383
391 335 585 429 798 454
496 397 741 526 1012 654
Normal
Medium
Boost
Normal
Medium
Boost
Normal
Medium
Boost
Normal
Medium
Boost
19-15
14-10
9-6
6-4
4572 3767 6831 4589 9328 4954
4995 4105 7462 5156 10192 5568
5231 4453 7817 5650 10673 5886
2992 2573 4470 3306 6101 3528
3521 2996 5261 3798 7186 3955
4190 3589 6261 4596 8547 4869
1703 1443 2542 1825 3473 1887
2047 1730 3057 2180 4173 2235
2423 1982 3620 2627 4941 3265
1095 945 1638 1218 2235 1307
1334 1143 1996 1464 2723 1549
1692 1355 2528 1795 3453 2231
Tot. Sens. Tot. Sens. Tot. Sens.
15° 20° 25° 27° 36° 45°
Tot. Sens. Tot. Sens. Tot. Sens.
Tested in accordance with BS 4856 Part 2. Flow rate 340 ltr/h. Relative humidity 50%.
Model
Sound Pressures at 2.5m (dBA)
19-15 27.2 31.8 38.6
14-10 23.1 28.5 40.1
9-6 21.6 29.6 38
6-4 23.7 31.7 40.7
Normal Medium Boost
Weight, Water Content and Motor Power
Model
Motor
Power (W)
Water
Content (l)
Unpacked
Weight (kg)
19-15 80 0.3 7.7
14-10 62 0.32 9.1
9-6 35 0.56 12.7
6-4 35 0.75 15.7
Test Pressure 20bar (2MPa) Maximum Working Pressure 10bar
Water connections 15mm Electrical supply 230V - 50Hz
Approximate Hydraulic Resistance through Fan Convectors
Litres/h
6-4
910
514
235
47
9-6
998
520
121
97
14 -10
1240
719
324
75
19 -15
1670
954
469
77
6-4
8.98
5.06
2.35
0.45
9-6
9.85
5.10
1.18
0.97
14 -10
12.20
7.00
3.20
0.75
19 -15
16.40
9.40
4.60
0.82
455
340
227
113
mm wg
kPa
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09
LO-LINE RC & LO-LINE RC Heater/Cooler
11.0 Operating Instructions
Description
This LO-LINE unit is fitted with a control system that provides
3 different operating modes. In automatic mode the desired
temperature set point is selected and the unit will adjust the fan
speed according to the difference between the actual room
temperature and the set point. When the room temperature
reaches the set point the fan will switch off and thereafter will
continue to cycle on and off to maintain the room temperature.
The temperature set point range is 15 - 35°C.
In manual mode the automatic temperature control is
overridden and any of the three fan speeds can be operated
inrespective of the water temperature in the unit. This means
that air circulation can be provided in summer for example, or
that heating performance can be controlled manually.
In manual mode, with water temperature control, any of the 3
fan speeds can be selected and the fan will operate when the
water temperature in the coil is greater than 32°C. This means
that heating performance can be controlled manually, and the
unit could be controlled via an external room thermostat.
The unit can be controlled using the infra red remote control
handset supplied with the unit (see fig. 5) and also using
the control panel on the unit (see fig. 6). If necessary, however,
the control panel can be locked electronically to prevent
tampering once the controls have been set (see over).
The remote control hand set takes 2 AAA batteries (not supplied).
Fig. 5 Fig. 6
Controls Display
Power button Switches unit on & off
‘+/-’ button Adjust temperature set point from
15 - 35°C
Scrolls into F1, F2 or F3 manual mode
Heating
The unit will only operate in heating mode when the central
heating boiler is on, the pump is running and the system
water temperature is greater than 32°C. Ensure the boiler is
on, and set timer, boiler controls and room thermostats as
necessary.
10.0
11.0
Page 10
Manual
Manual mode can be used for air circulation without heat or for
manual control of the heating function.
Use ‘+’ to scroll beyond 35°C
Or use ‘-’ to scroll below 15°C
Selected fan speed displayed
Continuous
fan only
Fan & water
temperture
(water inlet >32°C)
Scrolling back out of manual using the ‘+’ or ‘–’ button will revert
the unit back to last temperature set point.
Cooling Mode
l Close the heating system and isolate any other heat emitters.
l Open the cooling water system.
l Ensure cooling is on, and set cooling unit timer and controls
as necessary.
Cooling operation works in exactly the same way as heating.
Follow the procedure above to set the unit controls.
Locking Unit Controls
The control panel on the main unit can be locked electronically
to prevent interference once the controls have been set. After
setting the unit to the desired temperature setting and with the
unit in running mode, press the On/Off button on the main unit
for about 6 seconds until the two middle horizontal bars appear
on the display. The horizontal bars will disappear after about 6
seconds and the unit is in key lock mode.
If any of the unit controls are pressed the horizontal bars will
reappear to show the key lock mode is activated, however,
during this mode the handset controls remain functional.
To unlock the system press the On/Off button for about 6
seconds until the horizontal bars disappear.
10
LO-LINE RC & LO-LINE RC Heater/Cooler
12.0 Troubleshooting
Once installed this fan convector becomes part of a complete
heating system that will generally include a boiler, pump, other
emitters such as radiators and fan convectors, and a number of
heating controls, dependent on system complexity. An apparent
problem with this unit may be the result of system controls being
incorrectly set and can be solved easily without calling out your
installer or MYSON Service. Before calling your installer or
MYSON Service, please carry out the checks listed opposite.
Note: If you call out MYSON Service to a fault detailed opposite,
or to repair a fault caused by incorrect use, a call out charge will
be made.
11.0 Operating Instructions (continued...)
Operation Display
Power off No Display
Switch on supply to unit for 30 seconds
(unit off)
Supply on / unit off
Switch on unit Set point flashes for
approx 5 secs, then
Ambient temperature
displayed
Use ‘+/-’ to adjust Set point flashes for
set point approx 5 secs, then
Ambient temperature
The ambient temperature is always displayed unless the water
temperature falls below 32°C*, or if the set point is being
adjusted.
Water temp <32°C Shows both power
& unit on
*32°C in heating and above 20°C in cooling.
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LO-LINE RC & LO-LINE RC Heater/Cooler
12.0 Troubleshooting (continued...)
Common Installation Faults
For optimum performance, this unit must be correctly sized to
match the heat loss requirements of the space it is required to
heat, and the heating system must be correctly designed to
provide adequate flow of hot water to the unit (refer to section
2). If the recommendations in section 2 are not followed,
problems may arise as detailed below.
Heating Mode -
No Fan
Heating Mode
(Heater model only)
poor heating
performance and/or
unit cycles on
water sensor
Possible Causes
Unit switched off
Temperature set point reached
Unit not switched on at fused spur
Fuse blown at fused spur
Unit isolating valves shut
Water temperature reaching fan
convector below 32°C
(Heater model only)
Problem Remedy
Low water temperature to unit Turn up boiler thermostat
Poor water flow Vent air from heating system
Note: Operation of fan convector can be checked by
switching to manual fan setting
Turn on
Increase temperature set point
Switch on at spur
Replace fuse
Open valves
Check boiler -
Programmer ON
Boiler ON and set to high with central
heating pump running
Note: Operation of fan convector can be checked by
switching to manual fan setting
Heating Mode
(Heater model only)
poor heating
performance and/or
unit cycles on
water sensor
Possible Causes
Boiler thermostat set too low
Lack of flow to fan convector -
Pump set on low setting
Isolating valves not fully open
System incorrectly balanced with unit starved of hot water flow
Pipe sizing to unit too small
Problem
Poor heating performance
(Heater model only)
Unit incorrectly sized for heat loss of room
13.0 Maintenance
Before undertaking any maintenance activity isolate the
electrical supply.
Maintenance should be restricted to occasional removal of dust
and lint around the unit. The outer surface may be wiped over
with warm water and mild detergent taking care to avoid water
entering the grille areas.
If the fan convector is still faulty after checking the above, call your installer or MYSON Service.
11.0
12.013.0
Page 12
heatingthroughinnovation.
01.06.2011 ISSUE 5
After Sales Service:
MYSON Service, Somerden Road, Hull, East Yorkshire HU9 5PE
T: 01482 713927, F: 01482 789056, service.convectors@myson.co.uk
Spare parts and technical help on all Convector products are available from MYSON Service.
MYSON Eastern Avenue, Team Valley, Gateshead, Tyne & Wear NE11 0PG, UK
T: 0845 402 3434, F: 0191 491 7568, sales@myson.co.uk, www.myson.co.uk
Serial Number Location:
Inner chassis position
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