Biddle PS Series User manual

Modular fan coil unit
Model PS
Version 2.1
17-07-2018
English
Manual
Q P

B
2 Manual model PS
Copyright
All the information and drawings in this man-
ual are the property of Biddle and may not be
used (other than for the actual operation of
the device), photocopied, duplicated, trans-
lated and/or be brought to the attention of
third parties without Biddle’s prior written
permission.
The name Biddle is a registered trademark.
Trademarks
The name Biddle is a registered trademark of
Biddle bv.
Warranty and liability
Please refer to Biddle's Terms of Sales and
Delivery for warranty and liability conditions.
Biddle excludes liability for consequential
loss at all times and under all circumstances.
Liability for the contents of
this manual
However much care might have been taken
in ensuring the correctness and, where nec-
essary, completeness of the description of
the relevant parts, Biddle disclaims all liability
for damage resulting from any inaccuracies
and/or deficiencies in this manual.
Should you detect any errors or ambiguities
in this manual then we would be pleased to
hear from you: it helps us to improve our
documentation even further.
Biddle retains the right to change the specifi-
cations stated in this manual.
For more information
If you have any comments or questions
about specific topics relating to this product,
please do not hesitate to contact Biddle.
Addresses
United Kingdom
Biddle Air Systems Ltd.
St. Mary’s Road
Nuneaton
Warwickshire CV11 5AU
United Kingdom
telephone: [phone]
fax: [phone]
e-mail: [e-mail]
internet: www.biddle-air.com
Other countries
Biddle Export
PO Box 15
NL-9288 ZG Kootstertille
The Netherlands
telephone: [phone]
fax: [phone]
e-mail: [email protected]
internet: www.biddle.info

Modular fan coil unit Contents
Version 2.1English (17-07-2018)3
Contents
1Introduction ........................4
1.1 About this manual ............................. 4
1.2 How to use this manual .................... 4
1.2.1 Marginal symbols in the manual ......... 4
1.2.2 Pictograms used on the unit and in
the manual................................................... 4
1.2.3 Related documentation....................... 4
1.3 About the unit.................................... 5
1.3.1 Applications ........................................ 5
1.3.2 Working............................................... 5
1.3.3 Modules .............................................. 5
1.3.4 Type code ........................................... 6
1.3.5 Type plate ........................................... 6
1.4 Components ..................................... 6
1.4.1 Required components......................... 6
1.4.2 Accessories ........................................ 7
1.4.3 Parts not supplied............................... 7
1.5 Safety instructions ............................ 7
1.5.1 Operation............................................ 7
1.5.2 Installation, maintenance and
service ......................................................... 7
2Installation..........................8
2.1 Safety instructions ............................ 8
2.2 Delivery check .................................. 8
2.3 General instructions.......................... 8
2.3.1 Order of working ................................. 8
2.3.2 Miscellaneous..................................... 8
2.4 Installing the wall duct ...................... 8
2.5 Installing the roof duct ...................... 9
2.6 Suspending the unit........................ 10
2.6.1 Positioning ........................................ 10
2.6.2 Installing the suspension rail............. 10
2.6.3 Suspending and securing modules....11
2.7 Connecting the valve motor............ 12
2.8 Connecting ducts ............................ 12
2.9 Connecting the unit to the CH
and/or CW system ................................ 12
2.9.1 Water connections ............................ 12
2.9.2 Frost protection................................. 13
2.9.3 Connecting water pipes .................... 13
2.10 Connecting the condensate drain. 13
2.10.1 Particulars....................................... 13
2.10.2 Connecting the condensate drain... 13
2.11 Connecting the unit to mains
power supply......................................... 14
2.11.1 General ........................................... 14
2.11.2 Connecting to mains ....................... 14
2.12 Installing the controller.................. 14
2.13 Switching on and checking
operation............................................... 14
3Maintenance ....................16
3.1 Safety instructions .......................... 16
3.2 Replacing the filter .......................... 16
3.2.1 Introduction....................................... 16
3.2.2 Replacing flat-bed filter in base
module....................................................... 16
3.2.3 Replacing bag-type filter or pleated
filter............................................................ 16
3.3 Cleaning.......................................... 16
3.4 Scheduled maintenance ................. 16
4Service.............................18
4.1 Safety instructions .......................... 18
4.2 Opening the unit ............................. 18
4.2.1 Base module..................................... 18
4.2.2 Electronics compartment .................. 18
4.3 Fuses .............................................. 19
4.4 High-limit thermostat....................... 19

B
4 Manual model PS
1 Introduction
1.1 About this manual
This manual describes the installation and
maintenance of the modular fan coil unit,
model PS.
This manual only relates to the unit itself. A
separate manual covers the operation and
control of the unit.
1.2 How to use this manual
1.2.1 Marginal symbols in the manual
n Note:
Draws your attention to an important part of
the text.
cCaution:
If you do not carry out this procedure or
action correctly, you may damage the unit.
So, follow the instructions carefully.
wWarning:
If you do not carry out this procedure or
action correctly, you may cause material
damage and/or physical injury.
So, follow the instructions carefully.
dDanger:
This indicates actions which are not per-
mitted. Ignoring this warning may lead to
serious damage or accidents that may
involve physical injury.
For units with … :
With ... module:
The description applies only to models that
have the feature referred to.
If no specific model is referred to, the de-
scription applies to all models.
1.2.2 Pictograms used on the unit and
in the manual
The below pictograms refer to possible risks
or dangers. These pictograms can also be
found on the unit.
ê wWarning:
You are entering an area which
contains live components.
Accessible to qualified mainte-
nance staff only. Caution is
urged.
ç wWarning:
This surface or part can be hot.
There is a risk of burns on con-
tact.
1.2.3 Related documentation
Besides this manual, the following docu-
ments come with the unit:
-documentation for control and operation
(if applicable);
-wiring diagram for installation and ser-
vice purposes.

Modular fan coil unit 1Introduction
Version 2.1 English (17-07-2018) 5
1.3 About the unit
1.3.1 Applications
The modular fan coil unit is designed for
heating, cooling and/or ventilating rooms.
The inlets and outlets of the unit are posi-
tioned in such a way that the discharged air
flow is distributed evenly across the room
without causing discomfort to the people in it.
The unit’s dimensions are geared to integrat-
ing the unit in suspended ceilings.
1.3.2 Working
The fan coil unit blows a flow of air into the
room. The air may be taken in, at the user’s
option, either from outside (ventilation) or
from the room itself (recirculation). Thus, the
unit offers two benefits:
-The room is kept at the desired tempera-
ture.
-Gradual deterioration of air quality in the
room is counteracted.
1.3.3 Modules
A modular fan coil unit is made up of mod-
ules. Each module has its specific function.
By combining different modules, modular fan
coil units with different features can be com-
posed.
Type references and symbols of modules
PS B base
module
PS P plenum
module
PS F filter
module
PS FP pleated
filter
module
PS L air valve
module
PS G attenuation
module
PS V heating
module
(water)
PS VE heating
module
(electric)
The symbols can be found on the underside
of each module. On the base module, these
symbols indicate the order of the modules of
the delivered modular fan coil unit.

B
6 Manual model PS
1.3.4 Type code
The type references, when combined, consti-
tute the type code of the unit's modules, for
instance:
PS B-20-H1-M
PS P-21
PS G-40
PS V-61-H1C3-I
Various combinations can be made.
Explanation of type code
series PS modular fan
coil unit
module B, P, F, FP,
L, G, V, VE
see Section
1.3.3
capacity 20, 21, 40,
41, 60, 61
H1, H2,
H3, H4
water heating
C3, C4 water cooling
H1C3,
H2C2
water heating
and cooling
with base
module and/or
heating module:
heating and/or
cooling
HE electric heating
M modulating
control
S speed control
I Interface, either
with or without
touch control
B Basic, without
control
with base
module:
electronic
control
without
reference
not described
in this manual
1.3.5 Type plate
The type plate is located on the base mod-
ule.
Type PS B-40-H2-M
Code U 230 V ~ 50 Hz
Biddle bv
Markowei 4
NL-9288 HA Kootstertille Nº 123456/1-1 07-12 I
max
L1 0.88 A
I
max
L2 -
M 51 kg I
max
L3 -
Medium LPHW P
motor
0.20 kW
p
max
600 kPa P
heating
-
4023
Example of a type plate
References on the type plate
Type full type code of unit
Code if applicable:
unit code of electronic control
M weight of unit
Pmax with water heating:
maximum allowable operating
pressure
U supply voltage
Imax maximum amperage
Pmotor maximum power absorbed by fans
Pheating with electric heating:
maximum power absorbed by heat-
ing
1.4 Components
1.4.1 Required components
The following components are delivered
separately but are always required:
-mounting kit, consisting of a suspension
rail and fasteners for linking modules
-electronic control system components,
such as a controller, control cables, etc.
(see the documentation of the control
system)

Modular fan coil unit 1Introduction
Version 2.1 English (17-07-2018) 7
1.4.2 Accessories
The following optional accessories are avail-
able:
-water control unit
-servomotor for air valve module
-ventilation module for the control of an
extractor fan
-wall sleeve
-external air intake grille
-roof cap
-duct connection (PS TH and PS TV)
-flexible connection sleeves, with or with-
out connecting flange
-wall and ceiling grilles, fixed or adjust-
able
-condensate drain tray
-condensate discharge pump
1.4.3 Parts not supplied
The following parts are not supplied by
Biddle and should be procured from other
suppliers:
-threaded suspension rods (M8)
-mounting rail
1.5 Safety instructions
1.5.1 Operation
wWarning:
Do not put any objects in the inlets and
outlets.
Do not block the inlets and outlets.
ç
The upper surface of the unit can become
hot during operation.
1.5.2 Installation, maintenance and
service
wWarning:
The unit may be opened by qualified
technical staff only.
ê ç
Before opening the unit:
-Switch the unit off using the controller.
-Wait until the fans have stopped rotating.
-Allow the unit to cool down as the heat
exchanger or heating element can get
very hot.
-Disconnect the mains supply.
-Shut off the CH and/or CW supply (if
possible).
wWarning:
The fins of the heat exchanger are sharp.

B
8 Manual model PS
2 Installation
2.1 Safety instructions
wWarning:
Installation works may be performed by
qualified technical staff only.
Before opening the unit, follow the safety
instructions in Section 1.5.
2.2 Delivery check
-Check the unit and its packaging for
correct delivery. Report any transport
damage to the driver and supplier imme-
diately.
-Make sure that all parts and components
have been supplied (see Section 1.4).
Report any defects to the supplier imme-
diately.
2.3 General instructions
2.3.1 Order of working
Biddle recommends following the order of
working described in this section for perform-
ing the installation works.
n Note:
Make sure you perform all operations that
are required for the installation of your unit.
Check the type plate and refer to Section
1.3.5 if you are not sure about the model or
type of your unit.
2.3.2 Miscellaneous
cCaution:
The infiltration of coarse dust, cement, etc.
may damage the unit. So long as such con-
taminants are in the room,
-do not put the unit into operation;
-cover the inlets and outlets.
2.4 Installing the wall duct
Accessory, only in combination with air valve
module (PS L)
The wall duct is made up of a wall sleeve
and an external air intake grille. The wall duct
is made up of two parts which are slid into
one another.
Opening dimensions for wall duct
type opening, A x B wall thickness
PS 20, 21 628 x 142 mm
PS 40, 41 1003 x 142 mm
PS 60, 61 1503 x 142 mm
200 – 350 mm
or
350 - 650 mm
(dep. on type)
1 Apply the included expanding foam gas-
ket around the ventilation opening of the
air valve module.
2 Make an opening in the wall.
A
B

Modular fan coil unit 2Installation
Version 2.1 English (17-07-2018) 9
3 Fix the duct sections as you please, e.g.,
by bricking them in or by fixing them with
screws. If using screws, mind their posi-
tions: the screws must not hinder the in-
stallation of the external grille.
n Note:
Seal any gaps between sleeve and wall in a
draught- and leakage-free manner.
4 Drill the (∅ 5mm) grille fixing holes into
the flanges of the sleeve section that is
fixed to the outer wall.
5 Apply paste onto the inner side of the
grille flanges. The paste is to seal off the
gap between grille and sleeve in a
draught- and leakage-free manner.
6 Fix the grille to the flanges using sheet
metal screws.
cCaution:
Place the grille with the blades correctly
positioned: oriented outward to allow for run-
off.
2.5 Installing the roof duct
Accessory, only in combination with air valve
module (PS L)
The roof duct is made up of two parts: a roof
curb and a roof cap. The roof cap consists of
a cover and a sleeve. On delivery, these are
attached to one another.
Opening dimensions for roof duct
type opening, A x B
PS 20, 21 628 x 145 mm
PS 40, 41 1003 x 145 mm
PS 60, 61 1503 x 145 mm
1 Apply the included expanding foam gas-
ket around the ventilation opening of the
air valve module.
2 Make an opening in the roof.
3 Make a water-tight curb 1around the
opening.
4 Detach the cap from the sleeve. To do
so, loosen the screws in the upper side
of the sleeve.
5 Insert the sleeve into the opening. Con-
nect sleeve and curb by fixing screws 2
through the sleeve’s inner side.
6 Mount the cap to the sleeve.
n Note:
Seal any gaps between sleeve and roof in a
draught- and leakage-free manner.
A
B
Timber 70x70
Tar mastic
1
2

B
10 Manual model PS
2.6 Suspending the unit
2.6.1 Positioning
-Make sure that the structure from which
the modules are to be suspended can
carry the weight of the whole modular fan
coil unit.
Module weights
PS 20, 21 PS 40, 41 PS 60, 61
PS B 32 kg 51 kg 62 kg
PS P 8 kg 10 kg 12 kg
PS F, FP 10 kg 13 kg 16 kg
PS L 13 kg 16 kg 20 kg
PS G 18 kg 24 kg 31 kg
PS V, VE 15 kg 19 kg 22 kg
-Suspend the unit at a minimum height of
1.8 m.
-Suspend the modules level. This results
in proper venting of the heat exchanger
and (for units with cooling) in proper dis-
charge of condensate.
-Provide for proper sealing if wall or roof
sleeves and the like are installed. Im-
proper installation can cause draught
and condensate problems.
-Ensure the air can flow freely through the
unit’s inlets and outlets.
-Position the unit such that the modules
will be easy to access both during and
after installation.
2.6.2 Installing the suspension rail
The modules are hooked into the included
suspension rail n one side. On the opposite
side (connection side), the modules are
suspended from a thread rod. The suspen-
sion rail may either be suspended from a
thread rod 1(as illustrated above) or be
mounted directly onto the ceiling (as illus-
trated below).
1 Make a suspension structure using
thread rods, mounting rails and the sup-
plied suspension rail. On each thread
rod, apply two nuts at an intermediate
distance of about 4 cm 2.
Centre distance between mounting rails and
suspension rails
PS 20, 21 PS 40, 41 PS 60, 61
A 782 mm 1157 mm 1657 mm
n Note:
-Keep a minimum distance of 190 mm
between the centre of the suspension rail
and a wall or obstacle, such as a pillar.
This is to allow the modules to be
hooked in.
-Mount the rails in line with a possible
opening for a roof or wall sleeve.
A
190
1
2

Modular fan coil unit 2Installation
Version 2.1 English (17-07-2018) 11
2.6.3 Suspending and securing
modules
1 The base module (PS B) and the at-
tenuation module (PS G) are provided
with a securing bracket 3. Remove it.
2 Hook the modules into the suspension
structure one by one. Hook the suspen-
sion brackets 4into the suspension rail
on the one side, and the suspension
hook 5in the thread rod on the other
side.
In suspending the modules, follow the
order that is indicated in the schedule on
the base module (see Section 1.3.3).
3 Using the thread rods, adjust the mod-
ules vertically so that they are level.
4 Secure the suspension hook 6between
the two nuts on the thread rod.
5 Interlink the modules 7.
cCaution:
When linking the modules, do not fully press
the rubber seal 8together.
Ensure that the air valve module, if any, is
attached to the roof or wall duct in a draught-
free manner.
6 Re-attach the securing bracket 9, which
was removed in step 1, to the relevant
module(s).
wWarning:
Make sure that the module(s) is (are) se-
cured. Unsecured suspension may lead to
a module falling out of the suspension
structure.
3
4
5
6
7
8
9

B
12 Manual model PS
2.7 Connecting the valve
motor
Accessory with air valve module (PS L)
The air valve module is available with a pre-
mounted valve motor. If the module does not
yet have a valve motor, you must mount it
first.
1 Both the valve motor and the base mod-
ule have a cable with a connector. Con-
nect these.
2 You may want to set a stop to the valve
motor.
This allows you to open the air valve par-
tially, so the unit will ventilate and recir-
culate at the same time.
2.8 Connecting ducts
Only with plenumPS P or duct
connectionsPS TH and PS TV
The plenum module PS P (illustrated) allows
the modular fan coil unit to be connected, via
circular ∅ 200 mm ducts, to a discharge or
intake opening.
Mounting the ducts depends on the local
situation, and is to be carried out according
to your own judgment. However, follow the
below instructions in order not to affect the
unit’s performance:
-Avoid any abrupt duct transitions.
-Keep ducts as short as possible.
-Mount flexible connection sleeves to the
intake opening under slight tension (this
is to prevent the connection sleeve from
being sucked to a close at high fan
speeds).
-Provide for proper sealing at transitions
in the duct system.
2.9 Connecting the unit to the
CH and/or CW system
Only for units with water heating and/or cool-
ing
2.9.1 Water connections
Depending on the type, the connections have
female-thread fittings or compression fittings.
The heat exchanger may come with pre-
mounted control valves. If so, the CH and/or
CW pipes are to be connected to them.
The connections are marked with arrows that
indicate either supply or return: with heating,
the arrows are red; with cooling, blue.
Connection through rectan-gular ducts is
possible with the duct connections PS TH
and PS TV,using flexible connection sleeves
(not illustrated).

Modular fan coil unit 2Installation
Version 2.1 English (17-07-2018) 13
The (1/8") vent cocks 1are mounted to the
collectors of the heat exchanger, protruding
from the side of the module.
cCaution:
Biddle recommends the inclusion of a valve
in each pipe.
Operating pressure for CH and CW systems
temperature maximum
operating
pressure
< 20° C 16 bar
< 93° C 10 bar
screwed fittings
< 110° C 6 bar
compression fittings all 3 bar
2.9.2 Frost protection
Only for units with ventilation
Depending on the control system, the unit
has a frost protection thermostat or a control-
ler-integrated protection.
cCaution:
This reduces the risk of the heat exchanger
freezing but does not warrant 100% protec-
tion.
Prevent the heat exchanger from freezing:
-Provide for constant circulation of the
water at the right temperature.
-Add glycol to the water when the unit is
not in operation during the wintertime.
2.9.3 Connecting water pipes
1 Lay the water pipes, and connect them to
the screwed or compression fittings.
cCaution:
Tighten the compression fittings well.
2 Fill the CH and/or CW system.
3 Vent the heat exchanger.
4 Check the connections for leaks.
2.10 Connecting the
condensate drain
Only for units with cooling
2.10.1 Particulars
The unit has two (∅15mm) condensate wa-
ter drains 2. One of the drains must be fitted
with a stink trap and connected to the sewer.
The second drain is closed with a compres-
sion cap but can be used if necessary.
The unit can be provided with a condensate
drain tray and/or a condensate pump (acces-
sories). If so, their drains must be connected.
2.10.2 Connecting the condensate
drain
1 Install a sewer connection incl. stink trap.
2 Connect the condensate drain tray to a
flexible hose.
3 Connect the hose, with a stink trap, to
the sewer.
4 Insulate the pipes that are not hanging
over the condensate drain tray.
1
2

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14 Manual model PS
2.11 Connecting the unit to
mains power supply
2.11.1 General
wWarning:
The unit must be earthed.
The unit must be connected in accor-
dance with all applicable local laws and
regulations.
cCaution:
Do not switch the unit on and off with the
mains switch but rather with the controller.
2.11.2 Connecting to mains
For units with water heating and/or cooling:
1 Install an earthed wall socket at no more
than 1.5m from the connection side of
the base module.
cCaution:
Do not yet insert the plug into the wall
socket.
For electrically heated units:
1 Install an all-pole switch with a minimum
contact distance of 3 mm.
2 Connect the switch to the mains.
wWarning:
Make sure that the mains supply
group is switched off.
3 Connect the unit to the switch according
to the wiring diagram.
cCaution:
Do not yet switch the mains supply group on!
2.12 Installing the controller
Depending on the type, the unit can be fitted
with an electronic controller. Install it accord-
ing to the respective manual.
The connections are located on the electron-
ics compartment or on the control unit's PCB
in the compartment (see Section 4.2.2).
2.13 Switching on and
checking operation
For all units:
1 Check if all modules are correctly sus-
pended and secured.
2 Check the order of installation of the
modules (see Section 1.3.3).
3 Check the connection to the mains.
4 Check the controller connections (see
the corresponding documentation).
5 Switch on the mains supply.
6 Make the controller ready for use accord-
ing to the appropriate manual.
7 Switch on the unit using the controller.
Check whether the unit blows out air.
For units with water heating and/or cooling:
Check if the heat exchanger is properly con-
nected:
8 Make sure the CH and/or CW system is
(are) switched on.

Modular fan coil unit 2Installation
Version 2.1 English (17-07-2018) 15
9 Let the unit heat and/or cool using the
controller. Feel whether the discharged
air is getting hot (if heating) or cold (if
cooling).
10 Vent the heat exchangers if necessary.
For units with cooling and condensate dis-
charge pump (accessory):
Check the working of the condensate dis-
charge pump:
11 Pour water into the external drip tray.
The condensate pump should start work-
ing shortly.
For units with air valve module:
12 Check the seal of the fresh air duct: it
should be draught-free.
13 Check whether the air valve closes off
the ventilation opening properly in both
modes.
14 Let the unit ventilate and recirculate
using the controller. Check whether the
air valve moves to the right position.
For units with an air valve module featuring a
valve motor with spring return:
15 Switch off the mains power supply and
check whether the valve automatically
closes the duct.
16 Switch on the mains supply and check
whether the valve works normally again.

B
16 Manual model PS
3 Maintenance
3.1 Safety instructions
wWarning:
Maintenance works may be performed by
qualified technical staff only.
Before opening the unit, follow the safety
instructions in Section 1.5.
3.2 Replacing the filter
3.2.1 Introduction
The filter must be replaced regularly. A dirty
filter may cause inadequate heating, cooling
or ventilation as well as a high noise level.
The interval at which the filter is to be re-
placed depends on the use of the room.
New filters are available from Biddle. You
may also clean the filter material with, for
instance, a vacuum cleaner. After some
cleanings, however, the filter must be re-
placed.
3.2.2 Replacing flat-bed filter in base
module
1 Remove the inspection panel from the
base module (Section 4.2.1).
2 Gently pull 1the frame and the filter
material out of the unit. If you handle the
filter too roughly, dust may fall out.
3 Replace the filter with a filter of the same
class.
3.2.3 Replacing bag-type filter or
pleated filter
Only for filter module PS F or PS FE
1 Remove the inspection panel from the
filter module (Section 4.2.1).
2 Gently pull 1the cassettes and the filter
material out of the unit. If you handle the
cassettes too roughly, dust may fall out.
3 Replace the cassettes with cassettes of
the same filter class.
3.3 Cleaning
You can clean the unit's exterior as well as
the air intake and discharge grilles with water
and a domestic cleaning agent. Do not use
any solvents.
wWarning:
Make sure no water enters the unit.
Carefully remove dust from the heating ele-
ment with a vacuum cleaner.
3.4 Scheduled maintenance
Biddle recommends to have the following
inspections performed by an installer or other
technical expert every year.
For all units:
-Check if the filter is clean enough, and
undamaged. Replace the filter if neces-
sary.
1
1

Modular fan coil unit 3Maintenance
Version 2.1 English (17-07-2018) 17
-Check the air intake and discharge grilles
for contamination and clean them if nec-
essary.
-Check the heating elements and the fans
for dust and other contaminants. Clean
them if necessary.
-Check the working of the fan.
For units with water heating and/or cooling:
-Check for water leaks. If there is a leak,
disconnect the unit from the mains, and
repair the leak.
-Check if the water circuit contains any
entrapped air. If yes, vent the circuit.
For units with cooling:
-Check if the condensate drain and con-
densate tray (accessories) are clean.
Contamination may lead to poor drain-
age and to growth of bacteria and fungi.
-Clean the filter of any condensate pump
(accessory) in the float module.
For units with air valve module:
-Check if the ventilation valve closes
properly in both modes.
-Check if the valve closes automatically if
the power supply is interrupted.

B
18 Manual model PS
4 Service
4.1 Safety instructions
wWarning:
Service work on the unit may be per-
formed by qualified technical staff only.
Before opening the unit, follow the safety
instructions in Section 1.5.
4.2 Opening the unit
4.2.1 Base module
The base module houses:
-the fan;
-the heat exchanger;
-the transformer with fuse (in some
types).
Remove the inspection panel from the base
module to access these components:
1 Turn the two quarter-turn fasteners 1.
2 Pull 2the inspection panel about 3 cm
down.
3 Slide 3the panel towards the discharge
opening.
You may want to remove the inspection
panel in its entirety:
4 Position the panel diagonally in the open-
ing, and remove it from the module.
4.2.2 Electronics compartment
The electronics compartment is located on
the side of the base module. It contains:
-the PCB and the electronic control con-
nections;
-the transformer with fuse (in some
types).
Remove the cover from the electronics com-
partment to access the PCB.
1
1
2
3

Modular fan coil unit 4Service
Version 2.1 English (17-07-2018) 19
4.3 Fuses
The fuse rating is indicated near the fuse
holder.
Location of fuses
fuse holder
unit type
transformer control
control Mor S
with capacity
20, 21, 40 or
60
on electronics
compartment
no individual
fuse
control Mor S
with capacity
41 or 61
on electronics
compartment
and in base
module (near
transformer)
no individual
fuse
control I on electronics
compartment
on PCB
control B in base mod-
ule (near
transformer)
not applicable
4.4 High-limit thermostat
For base module or electric heating module
The unit is protected with a high-limit ther-
mostat. When the heating elements reach a
too high temperature, the high-limit thermo-
stat will switch off the electric heating for
safety reasons. You can switch the heating
on again by resetting the high-limit thermo-
stat.
wWarning:
If the high-limit thermostat is activated
frequently, there may be a dangerous
defect. In that case, disconnect the unit
from the mains and consult Biddle.
The high-limit thermostat may also be acti-
vated when power is supplied to the unit after
a power failure.
To reset the high-limit thermostat:
1 Allow the unit to cool down.
2 Press the knob on the side of the base
module or heating module.

m
anufacturer:
Biddle BV
a
ddress:
Markowei 4
9288 HA Kootstertille
The Netherlands
e declare that the following product:
p
roduct description:
Modular
Fan Coil Unit
b
rand:
Biddle
m
odel:
PS
t
ype:
PS
-
20/21/40/41/60/61
In accordance with the following Directives:
2006/95/EC
2006/42/EC
the Low Voltage Directive
the Machinery Directive
2004/108/EC
the
E
lectromagnetic Compatibility Directive
Has been designed and manufactured to the following specifications:
EN 61000
-
6
-
2
Electromagnetic
Compatibility (EMC)
--
Part 6
-
1: Generic
standards – Immunity for industrial environments
EN 61000
-
6
-
3
Electromagnetic Compatibility (EMC)
--
Part 6
-
3: Generic
standards – Emission standard for residential, commercial and
light-industrial environments
EN 60335
-
1
(including A14)
Safety of household and similar electrical appliances
Part 1: General requirements
EN 60335
-
2
-
3
0
Safety of household and similar electrical appliances
Part 2-30: Particular requirements for room heaters
I hereby declare t
hat the equipment named above has been designed to comply with the relevant sections
of the above referenced specifications. The unit complies with all essentials requirements of the directives.
s
igned by:
. de Vries
, Managing Director
,
2012
Declaration of Conformity