Chaffoteaux & Maury CELTIC 2.24 RSC Installation And Servicing Instructions

CELTIC

2.24

RSC

~VANUFACTUREFi NO.

9226931.02

CELTIC

224

RSC NAT

9226931.03

CELTIC

2.24

RSC NAT

9226921.02

cEmc2.24 RSC LPG

9226921.03

CEkTIC2.24RScLPG

MODEL 7YPE

GAS COUNCIL NO.

4798003

Ikstaflatkon and

Servicing hstructfons

(leave these instructions with the user)

-‘rie

moaei

ana senaf number are on tne aata oaaae focafea on

front comuusnon cnamber oanei below exoanslbn vessel.

These numoers snoufd

be usxt

when oraenna

repncement

pans.

I

1 Looking Good. Heating Better

,

R

Q

3

0

25

o-

24

o-

23

Fig. 5

Fig. 6

Fig. 9

Fig. 10

A) Screws to oe founa m ac-

cessorles wcKet-case.

Fig. 13

Fig. 12

J K

L M N

4- t- t- f +-

J

K

L M N

Fig. 14

4

Fig. 15

Fig. 16

3

Fig. 18

Fig. 19

/42\

Fig. 21

Fig. 20

Fig. 23

39 3

l

El

Fig. 24

PUTTING INTO SERVICE

lighting

Turn gas service tap to left to sign (6).
With the ieft hand push in the pilot button (3) (fig. 18).
With the other hand push the ignitor button(6) (lig. 18).
When the pilot light is established hold the ptiot button
pushed in for 30 seconds.

(If lighting for the first time it may take a short time to clear

the air from the gas pipe before gas is available at the piiot).
Gently release the pilot button. If the pilot does not hold

repeat this procedure again until the piiot is maintained.
Check that the heating isolating valve (26) (fig. 17) is open.
Switch the main electric switch (9) (fig. 18) to start the
pump. The tiring of the main burner is initiated by the star­ting of the pump.

- SUMMER (hot water oniy) place the switch in the 5.1: po-

sition and open a tap.

- WINTER (heating and hot water) put the switch into po-

sition 9. Set the room thermostat to the required tempe­rature and the timer on the boiler to STOP.

How your boiler works

cleaning and servicing

1)

Production of hot water
Your boiler is designed to give hot water at a temperature
of 60’ C. with the temperature seiector on +, (7) (fig. 18).
when a tap IS turned on. The maximum flow rate will be :

6 Vmin (I .32 gpm) for the 2.20 RSC unit and 8 Vmin
(1.75 gpm) for the 2.24 RSC unit. It is possible to obtain
higher water volumes at lower temperature - to fill a bath
for example. turn the temperature selector to the sign ­and open the bath tap fully.

Remarks : It is possible to leave the temperature selector
on + and to reduce the temperature at the outlets by
mixing cold water through a mixing vaive. particularly for
showering and washing. in this case the boiler will operate
on its thermostat and may not come onto full gas rate, the

boiler will also cycle on/off.

2)

1)

Note : When in hot water only mode the temperature on
the temperature guage on the boiler will be about 90’ C.

Heating
Your boiler automatically adjusts the boiier output to the
heating. The boiler thermostat acts directly on the gas
control. it is normal for the burner to stay alight for long
periods but the flame will modulate.

controls

Installation without a room thermostat (not recommen­ded)
Set the boiler thermostat 5 (fig. 18) on the boiler as a func­tion of the external temperature and the required internal
temperature.
To increase the temperature turn the control to +, to redu­ce the temperature turn to -.

2) Installation with a room thermostat

- Set the control on the room thermostat to the desired

temperature.

- The room thermostat automatically controls the firing

of the boiler to achieve the chosen temperature.

- In cold weather the boiler thermostat (5) (fig. 18) can be

left in the position +.

- In warm weather it is recommended that the thermostat

is set to an intermediate position.

- The room thermostat will ensure that a uniform inter-

nal temperature is obtained.

To turn off the heating

- Put the control switch (9) (fig. 18) to the summer position
<< c: H. The boiier will now operate only on hot water demand.

To turn off the boiler

- Put the controi swnch to STOP.

- Turn otT the gas by turning lever (281 (fig. 16).
To isolate heating during summer only

In some installations where the boiler is the lowest part of the
system and the pipes rise vertically it is possible after the boi­ler has been operating continuously for a period to provide
hot water to get a thermosyphon circulation in the heating pi­pes. One wiil first observe that the pipes are getting hot and
eventually the first radiator wiil heat. This phenomenom can
be annoying in summer.

- The heating flow is fitted with an isolating valve (26) (fig.

16) giving, in the above circumstances the ability to prevent

the thermosyphon action in summer.

- When one switches to i:: also close the isolating valve on

the heating flow.

DO

not forget to open the valve again at

the start of the heating season when the control switch will

he set on 9 .

The boiier should be cleaned and serviced annually. It is re­commended that you enter into a service agreement with a
competent. qualified installer. Chaffoteaux Ltd can a&t
with names and addresses of approved installers/service engi­neers.

Recommendations

- Your installation will not function correctly unless it is ab-

solutely free of air and full of water.

- It is normai that the pressure shown on the pressure guage

will be lower when the water is cold than when it is hut.

- If the pressure on the pressure guage ( 12) (fig. 18), falls be-

low 1 bar when cold re-pressurise the installation as foi-

IOWS.

- Put the switch to STOP.

- Open the fill valve

- When pressure is about 1.5 bar (12) (fig. 18) close the fill

valve.

- Return the switch to its original position.
Note : it is possible after filling for a smali amount of water to

be expelled from the safety valve when the water temperature
rises. This is normal.

To remove the cover (fig. 18)

- Remove the thermostat knob (S), the timer knob (lo), se­lector knob (7), by pulling towards you.

- Remove the six screws (32).

- Remove the cover.

Access to air purger

i Remove the top front panel to give better sight of the purger

- and pass a screwdriver through the hole made for this putpo­se in the front cover.

Precautions in case of frost

1) Drain the hot water system

- Turn off the mains stop cock. open a hot water tap, and
a cold water tap.

- Remove the drain screw (33) and (34) (fig. 16 and 17).

- To re-fill the system proceed in reverse order.

2) Draining the heating system

- Turn off the boner by putting main switch to STOP.

- Leave the system to cool down.

- Open the valve on the safety valve (30) (fig. -16 and 17).

- Drain the system at all low points of the installation.

- Open the drain plug (35) (fig. 16 or 17).

5

To fill the s!stcm after draining. Close all the drain off
points

- close inc dram piug (35) (fig. 16

or 17).

- close tne valve on the safety valve 130) (fig. 16 or 17).

- Open the fill valve

and re-till slowly. close

ther air vents on the circuits.

- When the pressure gauge shows a pressure of I.5 bar
close the till valve.

- Check carefully all the air vents and or air purgers at
high pomrs on the installation.

anine the domestic hot water filter. to be found in the
trol tap.

eplace in reverse order.

top the boiler by switching the switch to STOP.

lose the mains stopcock (27) (fig. 16 or 17).
Inscrew the water regulator (36) (fig. 16 or 17). remove
nd clean the filter.

Cleaning the heating system filter

\ tilter IS incorporated In the return Isolating valve on the
left oithe boiier. The obscurmg ot‘thc tiitcr wlil be evident by
poor clrcuiatlon In the radiators or a iarec temperature diffe­rence between the tlow and return pipes. To clean the tilter.

Stop the boiler by puttmg switch to STOP.
Close the Isolating valves on the

flow

and return to the hea­ting system (26) and (3 I) (fig. 16 or 171 by pushing m and
tummg.

Refill your boiler (see recommendation).

Open the valve ofthe

safety

valve (301 (fig. I6 or 17).
Unscrew the head of the valve with a spanner (fig. 19).
Take out he head ofthe valve with the filter (tig. 201.
Clean the filter by brushing under running water.
Replace in reverse order.

INSTALLATION INSTRUCTIONS

installation requirements

: system should be installed by a qualified competent ins­:r. Our guarantee is dependent upon this condition.

: instailation of the boiler must be in accordance with the
, Safety Regulations. relevant Buiding Regulations. I.E.E.
,ulations and the Byelaws of the Local Water Underta­;. it shouid be installed in accordance also with the BS
les ot‘ Practice and the British Gas Publication X( [Material

installation Specitication for Domestic Central Heating
Hot Water 1). and any relevant requirements of the locai
Region. Local Authority and Water Undertaking.

articular-:
he boiier must be installed in a room/compartment of not

ss than 8 m3. It must be connected to a proper flue.
he room must have proper provision for combustion and

:ntilation air in order to maintain the proper functioning
‘the boiler.

description

The casing is galvanised steel painted with a white syn­thetic resin baked on.

The permanent pilot and thermocouple flame failure
will turn off the boiier if the piiot goes out.

Push button for piiot light.
Thermometer showing temperature of the water in the

heating system.
Control valve and thermostat to control the temperature

of

the

water in the heating system.
Push button on the piezo ignitor.
Hot water controi valve.

Main switch SUMMER (<:I:) - STOP - WINTER (8 ).

Delay timer 0- 14 hours.

Opening to give access to pump head.

Pressure gauge to indicate the pressure in the heating sys­tem.

Chassis in steel. The various parts of the boiler are as-

sembled

on the chassis.

Draught diverter in steel coated.

15)

16)

17)

18)

19)

20)

211

22)

23)

24)

25)

26)

271

28)

29)

30)

31)

In front of the draught diverter the expansion vessel is
mounted. The expansion acceptance of the vessel varies
according to the boiler output.

Heating body comprising a copper heat exchanger and a
combustion chamber in coated steel and lined with a
combustion ceramic.

Multigas burner comprising :

- burner in stainless steel

- mainfoid with injectors

- thermocouple flame failure
Gas valve assembly comprising :

- Thermoelectric vaive

- A two stage gas valve giving full modulation and low
flame/off.

Heat exchanger for domestic hot water.
Thermostatic valve comprising :

- A diaphragm valve

- A thermostatic element which allows the user to
control the room temperature as a function of water
temperature.

- Screw to adjust output on heating.

Change over valve controlled by a demand for domestic
hot water. The heated water from the boiler is diverted
from the heating system to the DHW heat exchanger.

Electrical control box which inciudes the printed circuit
and fuses connections for a suppiy cable (twin and
earth). The room thermostat can also be connected in
the box.

Pump
Air purger and automatic air vent situated on the pump

outlet.
Overheat thermostat
Valve on heating flow to prevent gravity circulation in

summer.
Water service cock.
Inlet gas service cock.
Outlet connection for domestic hot water.
Safety valve with drain cock.
Heating return valve with filter.

.\n eiectric contral thermostat set to 6O’C controlling
the outlet temperature of the domestic hot water:The
thermostat acts directly on the pump which controls ‘the

boiler.
These features are patented.

6

hydraulic characteristics

(Fig. 51 shows the graph of the pump head available for the

>ystem.
The borier is delivered with a pump fitted with a 63 mm rm-

pellor (for the

120 RSC) and a 70 mm rmpeilor (for the 2.2-I

RSC model).

Characteristics of the expansion vessel

The expansron vessel. where fitted in front of the draught di­verter. is for a sealed system. It maintains a pressure m the

system and accepts the expansion of the water.

The expansion volume of the vessel is 5.4 litres.
Water voiume in an installation (fig. 6)

Water content of a

sealed

system varies as a function of:

- the design flow temperature

- the static head of the system (this is the difference in height
between the highest point on the system and the centre of
the expansion vessel.
hs : static head of system in meters
c : water content ofsystem in litres.

system requirements for boiler

The following are precautions to

take

:

- the boiler must be fitted on a fire resistant wall - light pani­tions should be avoided (fig. 7).

- it is necessary to tit a flue.

- a space of 6 in. (150 mm) shall be left free around the boiler
to allow ior the removal of the casing, to give access to

components. for servicing and for the efficient operation of
the draught diverter (fig. 9).

- do not tit the boiler above a cooker. The grease present in

the atmosphere over the cooker will cause poor performan­ce of the boiler.

- as this is an open flue appliance it cannot

be

fitted in a sho-

wer or bath room.

Recommendations to obtain the best performance from the
installation

- The hot water installation should be in copper tube. The

diameters should be calculated to avoid high resistances. it

is recommended that taps of low resistance are

used to

per­mit an adequate flow rate. The pressure required at the in­let to the boiier must

be

minimum 1 bar in addition to the

system resistance.

The water supply pipework should not have loose jumper
washer on any stop tap or non return valves fitted.

The boiler must only be used in indirect systems with pipes

in copper or black iron and where the heat emitters are cop­per (convectors), steel or cast iron. On no account should it
be used with galvanised pipes or heating components.

If the system water is being treated it must not be aggressive
or capable of promoting corrosion in the installation. Chaffo­teaux Limited recommend Femox CP3 inhibitor.

When replacing an old boiler it is strongly recommended that
a strainer is fitted in the system return. the filter in the return
valve is not sufficient.

Radiators with thermostatic radiator valves
When the boiler is fitted on a system where there are thermo-

static radiator valves the following recommendations should
be followed :

- leave at ieast one third of the load without thermostatic

controi.

- use a three port thermostatic valve to maintain the circula-

tion in the system and in the boiler if possible.

- Avoid long runs to radiators in 8 mm or 10 mm tube.

7

fitting the boiier

Preparation

- use the mountmg bracket as a template. The template will
be found in the carton under the srde panels.

- place in the position chosen for fixing the boiler. It is

possi-

bie to make a provisional fixing using a naii (fig. 12). The
mounting plate can then be levelled.

- mark the four fixing holes.

- remove the mounting plate.

- drill the fixing holes.

- using a rawplug or similar tit the mounting bracket using
6 mm x 50 mm wood screws.

- secure plastic tempiates (fig. 13) on the assembly jig by
means of the 4 screws.

- place the various elbow

sockets

on the plastic

templates

(fig. 13). This operation has to be done without the gaskets.
Take the

best

possible advantage of the rotating

sockets:

upward diffusion behind boiler, for instance. or

downwards

diffusion for distribution at baseboard level.

Gas and water connections

J - Heating return

K - Outlet hot water . . . . . .

Gas inlet NG . . . . . . . . .

L - Gas inlet LPG . . . . . . . .

M Inlet

- domestic hot water . . .

N - Heatine flow

Diameter

of pipes

22.3 mm

15.1 mm
15,l’mm

15.1 mm

22.3 mm

Threaded con-

nection size

I

3/4” BSP

I /2” BSP

3/4” BSP

/

l/2” BSP

3/4”%SP I

Pipe conn;Ttions
Once the support is in place pipe joints can

be made easily.

Their position is fixed by the rigid securing of the outlet

bends

to the mounting bracket.

The various pipe connections can be made without removing
the boiler or casing from the packing case. damage is thus
avoided.

Important : the safety valve mounted under the return isoia­ting valve protects the system against over pressurisation. It
must

be

connected to a drain pipe in 22 mm tube. For this

purpose a connection is supplied and a positioning

bracket

(37) (fig. 12). This pipe must not be soldered and the relief
pipe must vent to atmosphere.
Do not forget to fit the plastic tube from the air purger on the
braised connection nipple on this pipe.

Important : Before fitting the boiler in position on the sup­port

bracket

it is strongiy recommended that the systems is
cleaned and flushed. Use a product to eliminate the grease
and flux residues present atier soldering the pipes. Filings

and

pieces of solder if entrained into the boiler will adversely ef­feet its functioning.

Pitting the boiler
Lift the boiler and fix on the mounting

bracket

fixing points.

Check the position of the boiler
Check the boiler for level. adjustment can be made using the
two levelling bolts (38) (fig. 12) situated on the lower support
bracket so that the connections centre on the pipe connec­tions.

The connections are now in place. tighten the nuts.
To simplify this special tools are available from Chaffoteaux
Ltd (Consult our Sales Department).

Connecting the flue

2.20 RSC : 125 mm diameter - 2.24 RSC : 139 mm diameter.
When the appiiance is set lower than maximum.output for

heating the flue size must still be calculated on the maximum
boiler output.

electrical connections

The eiectricat control box requires :
a mams cable twm and earth suppiy.
Termmais are provided for the connection ot’a room ther­mostat.
The box has fuses fitted.

Connecting the boiler

- Take out the fuses (39) (fig. 24).

- Open the door on the box (22) (fig. 24).

- Cut the end of the cable entry to the size of the cable to
be used.

- Connect the supply and earth cable.

- close the door (22) and put back in place the fuse holder
(39) (fig. 24).

Function without room thermostat
In this case no modifications to the eiectricai box are ne­cessary. The boiler wiii function on its own thermostat.

mnection of a room thermostat

Normal room thermostat : 2 wire.

- remove the link in the electrical box between terminals

6 and 7 and connect the room thermostat in their place
(tip. 15).

Room thermostat with accelerator : 3 wire.

- Proceed as in 1 and connect the accelerator heater wire
to terrninai 8 (fig. 15).

Attention : take care in connecting the accelerator hea-

ter. It should not be live when the thermostat (< breaks D
on temperature rise. It may be necessary to reverse the

connections 6 and 8.

putting into service

Hot water circuits

- Open the water service tap (27) (fig. 16 or 17).

- Purge the instailation by opening the hot taps. Close the
hot taps ; the hot water circuits are now filled.

Re-filling the heating circuits (figs. i 6 and 17)

- Check that the isolating valves tlow (26) and return (3 1)
on the boiler are open. Also that the water service tap

(27) is open.

- Fill the system as for normal sealed systems.

- Vent air from the air vents on the radiators and at high

points on system where fitted.

- Close the fill valve

when the pressure on the pressure

gauge registers I .5 bar.

- Open the vent on the air purger 1 turn.

- Start the pump by putting main switch to *%+ winter.
e venting of the system may be assisted by repeated cycles

biiows.

- start the pump for a few minutes - stop - vent.
o up the system again if necessary and ensure that all the

vents are closed.

regulating adjustments to boiler

urai Gas - Propane - Butane (see table - page 9)
not adjust the input to the appliance.

possible to set the maximum output to control heating so
: the output to centrai heating can approximate to the ins­zd load thereby preventing noise which results from over­6ng on heating only.

To reguiate check that the boiler is operating at tiull gas rate.
.+djust the screw (4 I )

(fig

. 2-i). (Screw in to reduce and out to
increase). Regulate as requtred between till gas and 33 Vi of
the nommai output. Check the gas input at the meter. After
each movement of the regulating screw It IS necessary to stop
and start the pump by switching the main switch.

The boiler is supplied set to 75 %I of the nominal output.
This regulation does not effect the inPut of hot water which is
not changed by adjusment of the input to central heating.

To check the functioning of the hot water

- Slowly open the hot water tap with the selector closed until
the boiler lights. When the water is at temperature the boi­ler will cycie. The boiler will light on full gas and go out to
maintain the water temperature at 60’ C.

- Open the hot water tap fully and set the selector to maxi­mum. The temperature should be approx. 40-C (cold wa­ter entering at 15’ C).

fitting the casing

1) Take the control box cover. the glass door. the upper front

panel and the side panels from the carton.

2) Assembie the pieces starting with the side panels (fig. 21).
After these have been hung in position fix with screw at
the bottom and screw in half way.

3) Put the control panel into the mounting position. Fit the 4

screws. A!so the two screws. Also the two screws in the
side panels.

4) Fit the top front panel by engaging in the top fixing tur­retts (42) (fig. 2 1) the two screws into the bottom section.

5) Put on the control knobs. Gas push knob, thermostat, de­lay timer.

and hot water temperature selector.

6) The glass door is fitted with the aid of two fixing plates A

and B a spacer bar C which must be used (figs. 22 and 23).

- take out the two nuts which hold the spacer bar to the
door fixing plates and keep the screws.

-

put the door in vertical position, the spigot A (fig. 22) in
the protiie of the left hand side verticai trim and fix the
assembly in position.

Turn the right hand fixing plate 90’ and engage the part B
in the profile of the side panel trim. Fit the assembly to
the right hand side panel (fig. 23).

8

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PAGE 8.

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