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Biasi Prisma data

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Appliance components data
Model Biasi Prisma
Fan
Single or variable speed Single
Voltages 230V AC
Coil resistance 47 Ohms
Pump (Internal)
Models used Salmson MYE30, Myson CP53
High head alternative Salmson MYE50, Myson CP63
Pump head replaceable as separate component Yes
Diversion media (combi)
Mechanical or electrical Mechanical
Service kit available Yes
Diverter rests in which position Central heating
Air-pressure sensor/switch
APS/sensor fitted APS
Operational type (sensor/mechanical, etc.) Mechanical
Operational voltage 230V AC
Safety Devices
Manual re-settable overheat Yes
Temperature of overheat operation 105°C
Manual re-settable ignition lockout device Yes
Number of ignition sequence before lockout One
Low water pressure switch or sensor fitted No
Water flow switch fitted Yes
Type Diaphragm
Gas valve
Model used Honeywell Vk4105
Operational voltage (main valve) 230V AC
Main gas-valve resistance readings 1260 Ohms/3000 Ohms
Modulating valve fitted Yes
Coil resistance 125 Ohms
Modulator voltage readings:
Maximum gas 15V DC
Minimum gas Less than 9V DC
Gas pressures
Burner gas pressures, maximum and minimum:
24S 28S
Max. nat. gas = 10.5 mbar Max. nat. gas = 11 mbar
Max. LPG gas = 35 mbar Max. LPG gas = 35 mbar
Min. nat. gas = 1.3 mbar Min. nat. gas = 1 mbar
Min. LPG gas = 7 mbar Min. LPG gas = 5.5 mbar
Ignition start-up pressure;
Nat. gas 4 mbar
LPG 13 mbar
Temprature
Type and number of temperature regulating thermostats (negative temperature co-efficient (NTC), positive temperature co-efficient (PTC), open/closed thermostat, etc.):
1. Central heating NTC
2. Hot water NTC
Is one a primary sensor? Yes – Central Heating NTC
Wet or dry pockets? Both wet pockets
1. Temperature/resistance range reading 12k Ohms @ 20°C
2k Ohms @ 80°C
Printed circuit board
Number of PCBs on appliance Two
Identify (ignition main, etc.) Ignition/module
Main – Control PCB  
Jumper/links fitted Yes – Pump links and dip switches
Function/setting of above:
Dip switches
Dip switch ‘On’ position ‘Off position
Number 1 Has no function Has no function
Number 2 Gas type = nat. gas Gas type = LPG
Number 3 Set to on position after ignition pressure adjustment Allows adjustment of ignition pressure by ACC potentiometer
Number 4 No anti-cycle delay in heating demand 3-minute anti-cycle display in heating demand
Pump links
Pump link Pump operation
Link P1 The pump is controlled by central heating thermostat
Link P2 The pump is controlled by the room thermostat
Link P3 The pump will run constantly
Note: The pump links are on early model PCBs only: on later model PCBs the pump is fixed as in pump link 2
Number of PCB internal fuses One fuse on main PCB
Size 1.6 amp
Engineer adjustable potentiometers available Yes
Gas valve Potentiometer identification and function ACC potentiometer used with dip switch3 to
adjust ignition pressure RISC potentiometer
used to range rate central heating
Operational voltage to external demand switching Volt free
Electrode spark gap 4mm
Rectification spark gap 6mm
Primary water circuit filter fitted No
Domestic water flow regulator(combi) fitted Yes
Litres/min 2 sizes Blue= 10 l/min,
Red = 12 l/min
Location Cold mains inlet
Any special tools required to service/repair the appliance No

Written by centralheating

May 20, 2008 at 7:54 pm

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  1. Water 4 gasit is the new way to save tons of money on gas. Its great.

    gopliars

    October 2, 2008 at 6:47 pm

    Reply

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