Chaffoteaux & Maury CELTIC 2.24 RSC User guide

CELTIC 2.24 RSC
~VANUFACTUREFi NO.
9226931.02
CELTIC 224 RSC NAT
9226931.03
CELTIC 2.24 RSC NAT
9226921.02 cEmc2.24 RSCLPG
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 gasservice 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
pushedin for 30 seconds.
(If lighting for the first time it may take a short time to clear
theair from the gaspipe before gasis available at the piiot).
Gently release the pilot button. If the pilot does not hold
repeatthis 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 star-
ting 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. Setthe room thermostat to the required tempe-
rature 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 ISturned 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 RSCunit. 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 casethe boiler will operate
on its thermostat and may not come onto full gasrate, the
boiler will also cycle on/off.
2)
1)
Note : When in hot water only mode the temperature on
the temperature guageon the boiler will beabout 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 recommen-
ded)
Setthe boiler thermostat 5 (fig. 18)on the boiler asa func-
tion of the external temperature and the required internal
temperature.
To increasethe temperature turn the control to +, to redu-
cethe 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
issetto 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 operateonly on hot waterdemand.
To turn off the boiler
- Put the controi swnch to STOP.
- Turn otTthe gasby 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 boi-
ler has been operating continuously for a period to provide
hot water to geta thermosyphon circulation in the heating pi-
pes. One wiil first observe that the pipes are getting hot and
eventually the first radiator wiil heat. This phenomenom can
beannoying in summer.
- The heating flow is fitted with an isolating valve (26) (fig.
16)giving, in the abovecircumstances 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 seasonwhen the control switch will
heset on 9 .
The boiier should be cleaned and serviced annually. It is re-
commended that you enter into a service agreement with a
competent. qualified installer. Chaffoteaux Ltd can a&t
with names and addressesof approved installers/service engi-
neers.
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 pressureguage(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 1.5bar (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 safetyvalve when the water temperature
rises. This is normal.
To remove the cover (fig. 18)
- Remove the thermostat knob (S), the timer knob (lo), se-
lector 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 passa screwdriver through the hole made for this putpo-
sein the front cover.
Precautions in caseof 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. 16and 17).
- To re-fill the systemproceed in reverseorder.
2) Draining the heating system
- Turn off the boner by putting main switch to STOP.
- Leave the systemto cool down.
- Open the valve on the safety valve (30) (fig. -16and 17).
- Drain the systemat all low points of the installation.
- Open the drain plug (35) (fig. 16or 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. 16or 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 reverseorder.
top the boiler by switching the switch to STOP.
lose the mains stopcock (27) (fig. 16or 17).
Inscrew the water regulator (36) (fig. 16 or 17). remove
ndclean 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 diffe-
rencebetween 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 hea-
ting system (26) and (3I) (fig. 16 or 171by pushing m and
tummg.
Refill your boiler (seerecommendation).
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 reverseorder.
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
lesot‘ 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-:
heboiier must be installed in a room/compartment of not
ssthan 8 m3. It must beconnected to a proper flue.
heroom 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 syn-
thetic resin baked on.
The permanent pilot and thermocouple flame failure
will turn off the boiier if the piiot goesout.
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 accessto pump head.
Pressuregaugeto indicate the pressurein the heating sys-
tem.
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 vesselvaries
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 gasservice 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. 51shows 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
RSCmodel).
Characteristics of the expansion vessel
The expansron vessel.where fitted in front of the draught di-
verter. is for a sealedsystem. It maintains a pressure m the
systemand acceptsthe expansion of the water.
The expansion volume of the vesselis 5.4 litres.
Water voiume in an installation (fig. 6)
Water content of a sealed system varies asa function of:
- the designflow temperature
- the static headof the system (this is the difference in height
between the highest point on the system and the centre of
the expansion vessel.
hs : static headof systemin 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 pani-
tions should beavoided (fig. 7).
- it is necessaryto tit a flue.
- a spaceof 6 in. (150 mm) shall be left freearound the boiler
to allow ior the removal of the casing, to give accessto
components. for servicing and for the efficient operation of
the draught diverter (fig. 9).
- do not tit the boiler above a cooker. The greasepresent in
the atmosphere over the cooker will causepoor performan-
ceof the boiler.
- asthis is an open flue appliance it cannot be fitted in asho-
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 resistanceare used to per-
mit an adequate flow rate. The pressure required at the in-
let to the boiier must be minimum 1bar 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 cop-
per (convectors), steel or cast iron. On no account should it
be usedwith 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. Chaffo-
teaux 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.
- usea three port thermostatic valve to maintain the circula-
tion in the systemand in the boiler if possible.
- Avoid long runs to radiators in 8 mm or 10mm tube.
7
fitting the boiier
Preparation
- usethe mountmg bracket as a template. The template will
befound in the carton under the srdepanels.
- 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
meansof the 4 screws.
- place the various elbow sockets on the plastic templates
(fig. 13). This operation has to bedone without the gaskets.
Take the best possible advantage of the rotating sockets:
upward diffusion behind boiler, for instance. or downwards
diffusion for distribution at baseboardlevel.
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
Threadedcon-
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 isoia-
ting 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 sup-
port 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 ef-
feetits 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 connec-
tions.
The connections are now in place. tighten the nuts.
To simplify this special tools are available from Chaffoteaux
Ltd (Consult our SalesDepartment).
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 ther-
mostat.
The box hasfusesfitted.
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
beused.
- Connect the supply and earth cable.
- close the door (22) and put back in place the fuseholder
(39) (fig. 24).
Function without room thermostat
In this caseno modifications to the eiectricai box are ne-
cessary.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.
- Proceedas in 1and 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 (<breaksD
on temperature rise. It may be necessaryto reversethe
connections 6 and 8.
putting into service
Hot water circuits
- Open the water service tap (27) (fig. 16or 17).
- Purgethe 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 (31)
on the boiler are open. Also that the water service tap
(27) is open.
- Fill the system asfor normal sealedsystems.
- Vent air from the air vents on the radiators and at high
points on system where fitted.
- Close the fill valve when the pressureon the pressure
gaugeregisters I.5 bar.
- Open the vent on the air purger 1turn.
- Start the pump by putting main switch to *%+winter.
eventing of the system may be assistedby repeated cycles
biiows.
- start the pump for a few minutes - stop - vent.
o up the system again if necessaryand ensure that all the
ventsare closed.
regulating adjustments to boiler
urai Gas - Propane - Butane (seetable - page9)
not adjust the input to the appliance.
possible to setthe maximum output to control heating so
:the output to centrai heating can approximate to the ins-
zdload thereby preventing noise which results from over-
6ngon heating only.
To reguiate check that the boiler is operating at tiull gasrate.
.+djust the screw (4 I) (fig. 2-i). (Screw in to reduce and out to
increase). Regulate as requtred between till gasand 33 Vi of
the nommai output. Check the gasinput at the meter. After
each movement of the regulating screw It ISnecessaryto stop
and start the pump by switching the main switch.
The boiler is supplied set to 75 %Iof 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 boi-
ler will cycie. The boiler will light on full gasand go out to
maintain the water temperature at 60’ C.
- Open the hot water tap fully and set the selector to maxi-
mum. The temperature should be approx. 40-C (cold wa-
ter entering at 15’ C).
fitting the casing
1) Take the control box cover. the glassdoor. 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 tur-
retts (42) (fig. 21)the two screwsinto the bottom section.
5) Put on the control knobs. Gas push knob, thermostat, de-
lay timer. and hot water temperature selector.
6) The glassdoor 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 keepthe 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 engagethe 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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I’OSS I EILE CA tJSE
---mm-
l’II,O’l’ WILL NOT LICII’I’ -
I’1 LOT GOES OU’r W!iI:N -
GAS KNOB IS RELEASED
PIJhlP PIOT RLJNN I NG
BlJRNER WILL NOT LIGIIT -
WITH PUhtD RUNNING
. I:IL’rER BLOCKED ON
tIEATING RETURN.
I;
:ILTER ~LOCKI~ AT ~whw
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cII2 WATER SXTION
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NOT OPENED,
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FAULTY ‘I’fIIxhlOCOUPLE OR
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FAULTY ‘I’iIERhIO-ELECTR I C
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30’1’TOhI hl ICROS\t ITCII NO’1
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IALVI’.
:IIECK 1101’ \VATER C I RCU ITS
\ND RE-FILLING OF ‘I’IIE
IEATING CIRCUITS
ADJUS’r
REI’LACE OR
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INJECTOR SI:CUI! I[<(; ::!
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I;‘US IIS
‘1’IJRN ON
REFER ‘1‘0
I i’IS’I’A LLA’I’I ON
INS’l’RUC’I‘IONS -
PAGE 8.
REMOVE AND CI.I:XX
VENT
OI’EN
CON’I’ ’ Il. . .

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