Manual+Caldera+Roca+Laura+20 20F+ (Ingles) [PDF]

Zitiervorschau

LAURA 20/20F Wall-Hung On-Demand Combination Waterheater

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37

Table of contents Overall view Overall dimensions Pre-plumbing jig and Wall Spacing Frame Installation recommendations Start-up Checklist (I) Start-up Checklist (II) Pressures of gas Electronic PCB Electrical wiring Laura 2020 F Electrical wiring Main components (I) Main components (II) Control panel Sleeve Demand for Heating Demand for DHW (Winter) Demand for DHW (Summer) Stop and fault Set Time Hydraulic circuit Mains Water Inlet Demand for Heating Mini-accumulator Safety valve and By-Pass 3-way valve Gauge and Lack-of-water pressure switch Central Heating mode operation DHW mode operation Overheat thermostat Flame safeguard rectification system (I) Flame safeguard rectification system (II) Chimney “pull” safety 20/20 Process of code 22 Burner Combustion chamber Kit valve G20 and G25

Table of Contents Laura wall-hung waterheaters

1

38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

Cross-section of gas valve Gas changeover Kit Components of the boilers F and T Flue duct kit (I) Flue duct kit (II) Flue duct kit (III) Flue duct kit (V) Flue duct kit (VII) Central Heating programming (I) Central Heating programming (II) Central Heating programming (III) Central Heating programming (IV) Central Heating programming (V) Set-Up (I) - TECHNICIAN ONLY Set-Up (II) - TECHNICIAN ONLY Mantenance Fault codes Outlines hydraulic (I) Outlines hydraulic (II)

CSA

Laura 20/20F

CERTIFIED FOR NORTH AMERICA

USA CANADA

Low NOx emission level (Class 3) Laura 20/20F Electrical protection level: IP44D CE market. These waterheaters comply with the requirements of the Electromagnetic Compatibility Directive 89/336/EEC, the Gas Appliance Directive 90/396/EEC,the Low Voltage Directive 73/23/EEC, and the Efficiency Directive 92/42/EEC .

Overall View Laura 20/20Fwall-hung waterheaters

2

Ø 5" int.

247mm 9 3/4"

Ø 127mm int.

33 1/2" 850mm

33 1/2" 850mm

15 7/16" 392mm

17 23/32" 450mm

15 7/16" 392mm

Laura 20/20F

Laura 20/20F

Overall Dimensions Laura 20/20F wall-hung waterheaters

17 23/32" 450mm

3

Wall-mounting bracket, supplied with the pre-plumbing jig

Distance from the wall: 6 1/2" 163 mm

Pre-Plumbing Jig and Wall Spacing Frame Gap between connections: 2 3/8" 60mm

PMI

Laura 20/20F wall-hung waterheaters

4

Observe current regulations and minimum distance from flammable materials

19/32" minimum 1.5cm

15 3/4" minimum 40cm

Please refer to the Instructions which are delivered with the appliance

Installation Recommendations Laura 20/20F wall-hung waterheaters

5

Connect power supply 220v 15 amp service Connect room thermostat. Unlock the pump motor shaft (turn center screw to bleed). Make sure flue vent is properly installed. Fill the primary loop (if no DHW storage tank has been installed) slowly until the pressure reaches 1-2 bar. (If a DHW storage tank has been installed, then fill the secondary loop first). Open the DHW circuit for it to fill up and vent. With the gas inlet cock closed, start up the Central Heating/DHW mode (p15 #2). The boiler will per form a lighting cycle and will then lock out under code 12. Leave it like that for five minutes so that the pump , which is still running, can help vent the circuit. Next chec k the pressure level (p14 #1) and top up if it has dropped below 1 .5 bar. Open the gas inlet cock, reset the system ( p14 #5) and the boiler will start operating. Allow the boiler to operate in the Heating mode for ten minutes , in which period it should be checked that all radiators warm up. Should one radiator fail to warm up, bleed the air out of it. But if it still does not warm up, ays optimizing the pump performance curve then the flow rates in all radiators should be balanced, alw (flow rate/pressure) through its speed selector control (to left of pump - select one of three settings). Open the DHW tap with highest flow rate in the house. The boiler will operate for ten minutes continuously at full output. If the flue spillage detection thermostat (p40) does not trip, that means that the removal of flue gases is correct. The DHW flow can be adjusted if necessary. To do that, open the tap fully and turn the main water inlet flow adjustment screw (p22) until the leaving water temperature is 120ºF/49ºC (on screen, upper right), at full output. If a gas meter is available , check the gas supply pressure (p8 & p37 gas supply pressure test point).

S tart-Up Checklist (l) Laura 20/20F wall-hung waterheaters

6

Connect tester to the operating gas pressure test point and check the working pressure with the boiler operating at full output. Remove the tester, replace the plug and washer, restart the system, and using soapy water check the whole circuit for gas tightness. For a higher level of comfort, particularly where substantial pressure variations in the water supply occur, set the program close to the draw-off temperature.

Instruct the user on the following points: Recommend user to read the User’s Instructions. Instruct user on how to program the Central Heating and DHW temperature and the room thermostat (if any). Instruct user on how to top up the Heating system (1.5 mbar). Demonstrate how the fault codes work for insufficient gas (12 and 17). This is the most common fault code due to user error. Demonstrate to user how to reset after opening the gas inlet cock. Recommend that user press reset button (p14 #5) whenever a red fault lamp lights up. If the red light appears two or three consecutive times, tell the user to write down the fault codes and notify the nearest Service Center or Installer. Train user on the various safety devices, recommendations and maintenance operations specified in the waterheater instructions.

Start-Up Checklist (ll) Laura 20/20F wall-hung waterheaters

7

Gas Inlet Pressure: G20(NG - Natural Gas): 8 water column inches (20 mbar) G31(LP - Liquid Propane): 11.0 water column inches (27.4 mbar) Operating gas pressure test point Gas Input Rate (m3/h) (*) Pressure (mmwg) (**) G20 G31 Heat Output G20 G31 341 1.06 83 2.38 79,347 Btu 332 1.04 71 2.26 71,412 Btu 241 55 0.89 1.96 59,510 Btu 179 38 0.77 1.64 47,608 Btu 52 14 0.38 0.87 27,771 Btu Gas input rates and pressures with Natural gas (G20) are for a L.H.O.= 36,500Btu/m,3 density= 0,62, 59ºF and 14.7 PSI (*) measured under standard conditions (59°F and 14.7 PSI) (**) burner setting pressure

Pressures of Gas Laura 20/20F wall-hung waterheaters

8

Gas supply pressure test point (On the gas governor)

Rear view of electronic PCB

2A

C.T. 12/230

C.T. FUSE SAFETY FUSE

IGNITION TRANSFORMER

SAFETY RELAYS

T 160 MA

RELAYS

RELAYS

RELAYS

RELAYS

CHIMNEY SWEEP

Sw10

3.15 A

MAIN FUSE

TELEPHONE REMOTE CONTROL

WATER PRESION

EXHAUST FAN AND PUMP DHW DEMAND

SOLENOID VALVE AND BOILER MODEL

Electronic PCB Laura 20/20F wall-hung waterheaters

9

SENSORS AND LIMIT STATS

HOME AUTO.

THERMOSTAT COMMUNICATIONS

RÉSEAU

DHW SENSOR

Fan 1 speed Fan 2 speed Common exhaust fan Pump Pump

Blue Brown Black Blue Brown

EXCHANGER SAFETY DEVICE VARIABLE SIGNAL PRESSURE SWITCH

GAS VALVE HEATING SENSOR

SAFETY VALVE 27,769 Btu/7 Th PUMP

47,604 Btu/12 Th 71,406 Btu/18 Th

59,505 Btu/15 Th 79,340 Btru/20 Th

Sanitarium sensor Sanitarium sensor Heating sensor Heating sensor Bridge Bridge Exchanger safety device Exchanger safety device Earth Pressure switch (Vcc) Pressure switch (Signal) Pressure switch (GND)

Orange Orange Grey Grey

Valves common Safety valve Valve 18Th Valve 12Th Valve 7Th

Brown Red Grey Orange Blue

Blue Blue Green/yellow Red Blue Black

FLOW DETECTOR DEVICE

Bridge Bridge

A.T. BRIDGE TWO SPEED FAN

TELEPHONE REMOTE CONTROL CONNECTOR

POWER SOCKET 230v

LACK-OF-WATER PRESSURE SWITCH

Flow meter mass Flow meter signal Flow meter supply

Black White Red

Heating Pressure switch Heating Pressure switch

Grey Red

IGNITION ELECTRODES AND IONISATION SENSOR

ELECTRONIC BOX

Electrical Wiring Laura 20/20F wall-hung waterheaters

10

Anti-backdraught safety device Overheating safety device

Heating sensor

Flow detector device

1ª Speed BLUE

Common DHW sensor

Lack-of-water pressure switch

BLACK

Line volt thermostat 2ª Speed BROWN

Telephone control via Teletherm MT2

Power socket 110V

Natural draft open flue waterheater

Electrical Wiring Laura 20/20F wall-hung waterheaters

11

Fan assisted waterheater

Compact casing Top fixing: Locating pins Bottom fixing: Screws Removable decorative Color of casing: White RAL 9016 Stages of Output: 27,772 Btu 47,608 Btu 59,511 Btu 71,413 Btu 79,347 Btu Adjustable for Heating Net efficiency: 85%

Main Components (I) Laura 20/20F wall-hung waterheaters

12

Draught Diverter Ø flue socket collar: 127 Flue duct Ø 4.9" / 125 mm

Expansion Vessel Fill pressure: 10.88 psi / 0.75 bar. Butyl diaphragm and nitrogen charge Total/Useful capacity: 2.11 gal/1.19 gal (8 litres/4.5 litres)

Flue Spillage Limit Thermostat Set at: 149º F / 65º C

Heat Exchanger Bithermal. 6 steps in DHW andHeating. Made of copper and high-temperature aluminium paint.

Gas Valve 5 stages of output. Nat Gas governor: 6.8:8 wc" (17:25 mbar). No internal diaphragms. Coil voltage: 12Vdc.

Burner Stainless steel. 13 “becks” “Clover-like” flame on the ends for interlighting.

Mini-accumulator Capacity: 1.6 qt/1.5 litres. Made of copper

Combustion chamber Compact. Side fixing rods

Ignition electrodes and flame rod Flow detector device Circulator

Main Components (II) Laura 20/20F wall-hung waterheaters

13

Flow Meter

Circulator

Air Purge

Control Panel for Laura 20/20F 1. Pressure gauge 2. Heating+DHW service 3. DHW service

11

4. Stop 5. Fault Warning and Reset Button 6. Set Central Heating Temperature

9

7. Set DHW Temperature 8. Operating Temperature Control Knob

7

6

2 3

12

9. Digital LCD Display

1

10. Set Time 11. Validate Program 12. Mode Selection: Manual/Program 13. Set Day 14. Set Day/Time/Programmer Knob

13

Control Panel Laura 20/20F wall-hung waterheaters

14

14

10

8

5

4

12

13

11

10

7

9

8

14

2

6

3

5

1

4

1.

Pressure gauge

8.

Operating Temperature Control Knob

2.

Heating+DHW service

9.

Digital LCD Display

3.

DHW service

10.

Set Time

4.

Stop

11.

Validate Program

5.

Fault Warning and Reset Button 12.

Mode Selection: Manual/Program

6.

Set Central Heating Temperature 13.

Set Day

7.

Set DHW Temperature

Set Day/Time/Programmer Knob

Sleeve Laura 20/20F wall-hung waterheaters

15

14.

Winter Mode

(1)

(2)

1 2 3 4 5 6 7

(3)

1. 2. 3.

Press button for Central Heating + DHW service. The green indicator lamp will light up. Press the Set Central Heating Temperature button. The green lamp will light up and the temperature digits on the display will flash. Turn the temperature control knob as required. To exit the mode, press any button or wait 10 seconds.

Demand for Heating Laura 20/20F wall-hung waterheaters

16

Winter Mode

(1)

(2)

(3)

1. 2. 3.

Press button for Central Heating + DHW service. The green indicator lamp will light up. Press the Set DHW Temperature button. The green lamp will light up and the temperature digits on the display will flash. Turn the temperature control knob as required. To exit the mode, press any button or wait 10 seconds.

Demand for DHW Laura 20/20F wall-hung waterheaters

17

Summer Mode

(1)

(2)

(3)

Press button for DHW service. The green indicator lamp will light up. Press the Set DHW Temperature button. The green lamp will light up and the temperature digits on the display will flash. 3. Turn the temperature control knob as required. To exit the mode, press any button or wait 10 seconds.

1. 2.

Demand for DHW Laura 20/20F wall-hung waterheaters

18

(1)

1. Press the Stop button. The boiler will switch to permanent monitoring mode.

(1)

(2)

1. The fault code will be displayed on the screen. See list on last page. 2. The reset button will also light up. If necessary, press it once the fault has cleared.

Stop and Fault Laura 20/20F wall-hung waterheaters

19

(1) (2)

Setting the Time 1. Press the Set Time button. The clock hands will flash on the LCD display. 2. Using the Set Day/Time Knob, set the desired time. Setting the Day 1. Press the Set Time button. The day will flash. 2. Using the Set Day/Time Knob, set the desired day (1 for Monday, 2 for Tuesday, etc.) 3. To exit this mode, press the Set Time button again.

Set Time Laura 20/20F wall-hung waterheaters

20

Expansion Vessel Fill pressure:10.88 psi/0,75 bar. Butyl diaphragm and nitrogen charge Useful capacity:1.19 gal (/4.5 litres)

Overheating safety device automatic reset Set at 221ºF/105 ºC

Heat Exchanger 6 steps in Heating: 3 for flow and 3 for return Primary capacity: 0.08 gal/300 cm3 3 Secondary capacity: 0.07 gal/270 cm

Heating sensor Heating return pipe Ø 0.71"/18 mm external

Domestic Cold Water Inlet Pipe

Heating Flow pipe

Ø 0.55"/14 mm external

Ø 0.71"/18 mm external

Mini-accumulator

Circulator

0.4 gal/1.5 litres

3 speed

DHW sensor

Lack-of-water pressure switch

DHW Outlet Pipe Ø 0.55"/14 external

Analogic gauge

Safety Valve

Flow detector device

Fill point valve

Hydraulic Circuit Laura 20/20F wall-hung waterheaters

21

Flow detector device

Signal to electronic control panel

Mains water inlet

Inlet filter

Flow adjustment screw Fill point valve

Mains Water Inlet Laura 20/20F wall-hung waterheaters

22

Flow meter performance on Laura waterheaters

Outlet flow rate gallons (litres)/hour

198(750) 190(721) 185(700)

172(650) 162(612) 158(600) 148(560) 145(550)

132(500)

41(5)

46(8)

52(11) Temperature ºF (ºC) Pressure 29 psi/2 bar

Flow Detector Device Laura 20/20F wall-hung waterheaters

23

57(14)

63(17)

Insulation: Expanded Polystyrene (Porex)

Capacity: 0.4 gal / 1.5 litres

Inlet

Outlet

Mini-Accumulator Laura 20/20F wall-hung waterheaters

24

Inlet from heat exchanger

Bypass automatic valve

Flow to radiators

Safety valve Set at 43.5 psi / 3 bar

Safety Valve and By-Pass Laura 20/20F wall-hung waterheaters

25

Bypass connection Opens at 5.8 psi / 0.4 bar

Electrical connection for 3-way valve

3-way valve Turns in 10 seconds

Flow to cylinder

Inlet from heat exchanger

Flow to radiators Safety valve Quick connect Set at 43.5 psi / 3 bar

Bypass connection Opens at 5.8 psi / 0.4 bar

Anti-backdraught valve

3-way Valve Laura 20/20F wall-hung waterheaters

26

Connection to pump

Lack-of-water Pressure Switch with beeper

If pressure drops below 7.25 psi / 0.5 bar, an intermittent beep will be sounded and code 03 will be displayed.The beep will sound every 5 seconds for 3 minutes, will stop for 2 hours, then will continue beeping for another 3 minutes, after which it will stop for good.

Return from radiators

Analogic gauge Bypass connection Connection to fill point valve

Gauge and Lack-of-Water Pressure Switch Laura 20/20F wall-hung waterheaters

27

Expansion Vessel Fill pressure:10.88 psi / 0.75 bar. Butyl diaphragm and nitrogen charge Useful capacity: 1.19 gal (4,5 litres)

Heating sensor Temp.

Res. kW

14ºF/10 ºC 55.2 32ºF/ 0 ºC 32.6 50ºF/10 ºC 19.9 68ºF/20 ºC 12.4 77ºF/25 ºC 10.0 86ºF/30 ºC 8.06 104ºF/40 ºC 5.33 122ºF/50 ºC 3.60 140ºF/60 ºC 2.49 158ºF/70 ºC 1.75 176ºF/80 ºC 1.25 194ºF/90 ºC 0.91 212ºF/100 ºC 0.67 230ºF/110 ºC 0.51

Heat Exchanger 6 steps in Heating: 3 for flow and 3 for return 3 Primary capacity: 0.08 gal/ 300 cm Secondary capacity: 0.07 gal/ 270 cm3

To radiators Maximum operating pressure: 43.5 psi / 3 bar Temperature selectable between 86ºF/30ºC and 194ºF/90ºC

Heating Flow pipe Ø 0.71" / 18 mm external

Central Heating Mode Operation Laura 20/20F wall-hung waterheaters

28

Maximum operating pressure: 101.5 psi / 7 bar Overshooting and scale prevention 0” ON, 4’ OFF and 3” ON Possibility of change acc. To needs Exchanger

Mains inlet pipe

6 steps DHW Primary capacity : 0.08 gal/300 cm 3 Secondary capacity : 0.07 gal/270 cm 3

Ø 0.55"/14 external

Mini-accumulator

DHW sensor Temperature selectable between 86ºF/30ºC and 194ºF/60ºC Temp. Res. kW 86ºF/30 ºC 104ºF/40 ºC 122ºF/50 ºC 140ºF/60 ºC

8.060 5.330 3.605 2.490

Mains water inlet Outlet to draw-off points Ø 0.55"/14 external

DHW Mode Operation Laura 20/20F wall-hung waterheaters

29

Operation of the Overheat Thermostat Open during service

Open before light-up

Display of fault code 14 and red LED

Gas supply cuts off

Display of fault code 06 and red LED

Lockout No

Gas supply cuts off

No

Fault corrected

Fault corrected

Yes

Yes

Thermostat reset

Thermostat reset Press red reset buttom

Press red reset buttom

Boiler reset Press reset buttom

Service restored

Overheat Thermostat Laura 20/20F wall-hung waterheaters

30

Overheat thermostat automatic reset 221ºF(105ºC)

Call for service (Light-up) Safety solenoid valve opens (gas inlet)

Spark ignition: ignition electrodes

1st solenoid valve opens (27,769 Btu/7 Th) Boiler reset

Attempt to light up

Lights up in less than 2 secs.

Press reset buttom Yes

2nd solenoid valve opens No (47,604 Btu/12 Th)

Yes

Lockout

Light-up •End of spark ignition •Service available

Yes

Lights up in less than 3 secs.

•End of spark ignition •Safety solenoid No valve closes •Display of fault code 12 and red LED

Fault corrected

No

Service now restored

Flame Safeguard Rectification System (I) Laura 20/20F wall-hung waterheaters 31

Interruption of service

Attempt to relight

Spark ignition: ignition electrodes

Safety solenoid valve opens (gas inlet)

1st solenoid valve opens (27,769 Btu/7 Th) Boiler reset

Light-up process

Lights up in less than 2 secs.

Press reset button Yes

2nd solenoid valve opens No (47,604 Btu/12 Th)

Yes

Lockout

Light-up •End of spark ignition •Service available

Si

•End of sparks ignition •Safety solenoid No valve closes •Display of fault code 17 and red LED

Lights up in less than 3 secs.

Fault corrected

No

Service now restored

Flame Safeguard Rectification System (II) Laura 20/20F wall-hung waterheaters

32

Actuation before light-up

Actuation while in service Interruption of flue gas removal (insufficient chimney “pull”)

SPOTT safety open before light-up

Call for service

SPOTT safety detects backflow of flue gases

Light-up process Lockout

Three-minute pause before operating

Fault corrected

Pull restored

No

Yes

Dislay of fault code 07 and red LED

No

SPOTT automatic reset

Light-up

No

Service inSioperation

Lockout (SPOTT triggered)

Yes

Display of fault code 15 and red Led

Fault corrected

Yes

Call for service

Boiler reset

Press reset buttom

Yes Locked out again (Spott triggered) Stop

Waiting for service call

No

Calling for service

Fault corrected

Yes

Yes

Light-up

Service now restored

Yes

Calling for service

No

No Stop

Waiting for service call

Chimney “Pull” Safety 20/20 Laura 20/20F wall-hung waterheaters

Display of fault code 07 and red LED No

Yes

33

SPOTT automatic reset

Fault corrected

No

Stop Wait for service call

No

CHSPT=Tª required by user

Legend CHSPT=Central Heating Setpoint Temperature CHT= Central Heating Temperature DHWSPT=DHW Setpoint Temperature DHWT= DHW Temperature

No

Yes

CHSPT=Tª required by user

Yes

No No DHWT>131ºF(64 ºC)

Before 10’ DHWT>147ºF (64 ºC)

Yes

CHSPT=122ºF (50 ºC) Tª required by user displayed. Code 22 not displayed.

Before 10' DHWT