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Classic 

LXFF, FF

 - 

Installation

9

GENERAL

Minimum Requirements

Note.

 

The pump manufacturers minimum

requirements must be complied with

System 
return

Connections 
to boiler

Inverted cold 
feed entry

System 
flow to 
pump

150 (6")
Max

15mm
Cold 
feed

450 (18")
Mimimum

450 (18")
Mimimum

22mm
Open vent

Feed / expansion 
cistern

Water 
level
(cold)

Surge 
arrester

75 (3)
Min.

450
(18)
Min.

200
(8)
Min.

Highest 
point of 
flow or 
return

150

(6)

Max

Max. practical 

length

To pump

Cold

water 

level

Feed / expansion

cistern

75 (3) Min.

Flow

Return

22 (3/4)

Open vent

All dimensions in mm (in.).  

N.B. 

Imperial dimensions are approximate

4

LOW HEAD INSTALLATIONS

The system should be vented directly off the boiler flow
pipe, as close to the boiler as possible. The cold feed entry
should be inverted and MUST be positioned between the
pump and the vent, and not more than 150mm (6") away
from the vent connection.

There should be a minimum height - 450mm (18") - of open
vent above cistern water level. If this is impossible refer
below.

The vertical distance between the highest point of the
system and the feed/expansion cistern water level MUST
not be less than 450mm (18").

The pump MUST be fitted on the flow side of the boiler.

A suitable pump is a domestic circulator capable of
providing an 11°C (20°F) temperature differential (e.g.
Grunfos UPS 15/50 or equivalent). The vertical distance
between the pump and feed/expansion cistern MUST
comply with the pump manufacturers minimum
requirements to avoid cavitation. Should these conditions
not apply, either lower the pump position or raise the
cistern above the minimum requirement specified by

Caradon Plumbing Limited.

Note.

 

A cold water feed must be available back to the

boiler, when all automatic valves are in the closed position
(refer to BS. 6798) and when close coupled the feed must
not be in a vertical leg.

The 

Classic

 range of boilers can be

installed in low head situations by fitting a
'surge arrester' in the expansion pipe as
shown.

The following conditions MUST be
observed:

1.

The surge arrester must be at least
42mm in diameter x 150mm long,
thus ensuring a MINIMUM air gap and
a MINIMUM depth of water below the
static water level (cold) of 75mm.

2.

The static water level (cold) must be
at least 200mm above the top of the
horizontal flow pipe, fitted as shown.
The vent connection MUST NOT be
made immediately off the top of the
boiler, as venting is made less
efficient.

3.

The maximum practical length of
15mm cold feed pipe should be used
in order to reduce the effective
volume of system water expanding
into the feed/expansion cistern to a
minimum.

3

OPEN VENT SYSTEM REQUIREMENTS - FULLY PUMPED.

Summary of Contents for Classic FF230

Page 1: ......

Page 2: ...Classic LXFF FF Installation CAUTION To avoid the possibility of injury during the installation servicing or cleaning of this appliance care should be taken when handling edges of sheet steel componen...

Page 3: ...1 76 0 76 4 Boiler Size FF 230 FF 240 FF 250 FF 260 FF 270 FF 280 FF 2 100 Gas supply connection in BSP Rc 1 2 1 2 1 2 BSP Female Flow connection 22mm 28mm copper copper FEMALE Return connection 22mm...

Page 4: ...d appliance designed for connection via ducts to a horizontal or vertical terminal which admits fresh air to the burner and discharges the products of combustion to the outside through orifices which...

Page 5: ...ater central heating systems BS 5440 1 Flues for gas appliances of rated input not exceeding 60 kW BS 5440 2 Ventilation for gas appliances of rated input not exceeding 60 kW Health Safety Document No...

Page 6: ...e enough to accommodate the tool c If using the Complete Sealed System Unit then refer to the instructions packed with the unit for the necessary clearances Pelmet restrictions If the ability to fit o...

Page 7: ...l to obstructions and ventilation openings are specified in Table 3 4 Where the lowest part of the terminal is fitted less than 2m 6 6 above a balcony above ground or above a flat roof to which people...

Page 8: ...used for direct hot water supply For the types of system and correct piping procedure refer to Introduction and Frame 1 The central heating system should be in accordance with BS 6798 and in addition...

Page 9: ...circulator capable of providing an 11 C 20 F temperature differential e g Grunfos UPS 15 50 or equivalent The vertical distance between the pump and feed expansion cistern MUST comply with the pump m...

Page 10: ...ector hood assembly 2 Inter panel 3 Pumped return pipe 4 Rubber sealing grommets 5 Pumped flow pipe 6 Wall mounting plate 7 Sealing plates 3 off 9 Back panel 10 Controls support 11 Control box 12 Prog...

Page 11: ...wall plate 1 off z Terminal grille assy 1 off z Polyurethane foam seal 400 lg 1 off z No 8 x 8 lg Pozi pan hd screws 3 off 6 UNPACKING Pack A Contents z The complete boiler z Installation Servicing I...

Page 12: ...39 should be supported with the bracket provided If the stand off brackets have been used it is necessary in order to keep the flue aligned to use the spacer bracket with the support bracket It is MOS...

Page 13: ...shown 4 Mark onto the wall if required the following a The wall mounting plate screw positions choose one from each group Note Mark the centre of the flue hole as well as the circumference b The posi...

Page 14: ...t Ensure the boiler sealing ring is fully engaged Ensure the notch aligns with the groove on the outer flue duct This ensures correct alignment of the flue terminal 4 Stick the self adhesive foam stri...

Page 15: ...plate hooks as shown Do not use the burner controls for lifting 2 Fit the M8 screw washer and rectangular plate to retain the boiler Note Before fully tightening the M8 screw check the boiler alignme...

Page 16: ...making good the wall faces is not essential as seals are provided at both ends of the flue However both wall faces immediately around the cut hole should be flat make good if necessary For less accura...

Page 17: ...be is cut square mark the flue all the way round 4 Insert the cardboard duct ring for support and cut to length 5 Remove cardboard duct ring and remove any burrs 24 FITTING BOILER SEALING RING TO THE...

Page 18: ...s required then the downward routing pipe brackets and M8 spacer supplied in the Downward Piping Kit should be fitted to the wall mounting plate now 3 Fit the bottom 2 screws to secure the bracket s t...

Page 19: ...e fan 5 Pull the flue extension tube and engage onto the fan elbow and secure with the screw attached to the elbow Note The sealing ring studs will locate in the back panel one way only This will ensu...

Page 20: ...inal grille Boiler Extension tube Not for FF 2 100 model 33 FITTING THE KIT 1 Remove the cardboard support aid from the flue and place safely to one side 2 Fit the inner flue extension duct onto the i...

Page 21: ...wired into the mains lead in parallel with the control s to be overridden Refer to Frame 41 3 If a proprietary system is used follow the instructions supplied by the manufacturer 4 System designs fea...

Page 22: ...This is a fully controlled system set the boiler thermostat to maximum 4 Switchmaster Midi is similar in operation but the wiring differs slightly see the manufacturer s literature LEGEND b blue bk b...

Page 23: ...iler will be left off for more than a day or so then a frost thermostat should be wired into the system This is usually done at the programmer in which case the programme selector switches are set to...

Page 24: ...asing down and secure with the 2 captive screws To improve access to the gas valve remove the controls pod casing Release the controls pod front fixing screws 3 turns only Remove the pod by pulling it...

Page 25: ...them to the Householder 9 After installation commissioning and customer hand over instructionspleasecompletethe appliancelog book and leave this with the customer 10 Stress the importance of regular...

Page 26: ...iler casing must be removed Refer to Frame 48 3 Pull the HT lead connection off the printed circuit board and pull the lead upwards through the bottom panel grommet 4 Remove the 4 screws retaining the...

Page 27: ...nnect the fan leads 3a Rear flue Slacken the M4 screw securing the flue connector to the fan Disconnect the connector from the fan and slide into the flue 3b Side or top flue Slacken off two M4 screws...

Page 28: ...model illustrated For the deluxe model LX slide the glass fascia out before removing the sightglass assembly Refit the glass fascia after refitting the new sightglass assembly PILOT The pilot is fact...

Page 29: ...2 side retaining clips and remove the switch 12 Re assemble in reverse order 57 THERMOSTAT CONTROL THERMISTOR SENSOR LEAD and ON OFF SWITCH REPLACEMENT 58 PILOT BURNER REPLACEMENT 1 Refer to Frame 54...

Page 30: ...order 10 Replace the boiler casing 11 Check the gas valve operation 1 Refer to Frame 54 2 Remove the burner and air box assembly Refer to Frame 49 3 Remove the electrode retaining nut 4 Remove the pi...

Page 31: ...barbs on the PCB stand offs to release the PCB from the box 9 Fit the new PCB and re assemble in reverse order ensuring the correct orientation of the switch 10 Refit the boiler casing 11 Check the o...

Page 32: ...rews Retighten the screws 12 Replace the 2 rubber sealing grommets 13 Re assemble in reverse order 14 Remake all water connections ensuring that the compression fittings if used are correctly refitted...

Page 33: ...ssure switch Is the boiler casing correctly fitted Does the pilot light NO YES NO YES Does the spark stop after pilot is lit NO Is there a gas supply to the boiler Is the pilot injector blocked YES Re...

Page 34: ...at knob 1 079601 25 386 149 Automatic ignition printed circuit board PACTROL PCB 25 B 1 079716 27 385 861 Pressure switch HONEYWELL YAMATAKE C6065 A 1010 1 111379 28 E02 661 Fan assembly SIFAN No WFFB...

Page 35: ...d pilot assembly 13 Main burner 14 Main burner injector 69 BURNER ASSEMBLY Exploded View LEGEND Numbers up to 51 relate to the B G spares list 20 Control box 21 Thermostat potentiometer 24 Thermostat...

Page 36: ...36 Classic LXFF FF Installation 71 BOILER CASING ASSEMBLY SHORT LIST OF PARTS Deluxe model LX Standard model 72 SHORT PARTS LIST...

Page 37: ...Classic LXFF FF Installation 37...

Page 38: ...01482 492 251 Fax 01482 448 858 Registration No London 322 137 Registered Office National Avenue Kingston upon Hull HU5 4JN A subsidiary of Caradon p l c THIS SYMBOL IS YOUR ASSURANCE OF QUALITY These...

Page 39: ...l be giving away a free boiler for the five best ideas every year to be selected by our Technical Director Please complete this form using extra sheets if required and post it or fax it to us on 01482...

Page 40: ...to contact me Please arrange for me to join an Ideal factory tour Range guides required The Ideal Guide a specifier s and installer s introduction to the Ideal domestic boiler range The Ideal Househo...

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