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Summary of Contents for ARCA MK Series
- Page 1 Installation Usage Maintenance...
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Page 3: Table Of Contents
TABLE OF CONTENTS 1. IMPORTANT ...............................1 2. TECHNICAL DATA.............................2 2.1 MAIN SPECIFICATIONS OF MK BOILERS....................2 2.2 MK BOILER DIMENSIONS..........................4 2.3 TECHNICAL SPECIFICATIONS OF PRK BOILERS ..................5 2.4 DIMENSIONS OF PRK BOILERS .........................8 3. SWITCHBOARD ..............................9 3.1 SWITCHBOARD ............................9 3.2 WIRING DIAGRAM............................9 3.3 TERMINAL BOX CONNECTIONS ......................10 3.4 WATER STORAGE CYLINDER CONNECTIONS ..................10 3.5 RUNNING ..............................10... -
Page 5: Important
1. IMPORTANT This book is an important part of the product and it should be given to the user. Read carefully all information about installation safety, usage and maintenance. Keep the handbook carefully. Professional qualified people in according to common law following the producer’s instructions should carry out the installation. -
Page 6: Technical Data
2. TECHNICAL DATA 2.1 MAIN SPECIFICATIONS OF MK BOILERS − Pressurized steel boiler, for heating systems with hot water production up to 95°C. − Output: from 44 to 269 kW. - Running: light oil-gas. − Cylindrical furnace, flame inversion, detached from the back duct plate, arc-welded on a copper bar. −... - Page 7 MK 120 MK 140 MK 170 MK 230 MK 300 102 ÷ 120,2 120 ÷ 140,3 145 ÷ 170,1 174 ÷ 230 220 ÷ 291,7 Output kcal/h 87.720 ÷ 103.372 103.200 ÷ 120.658 124.700 ÷ 146.286 149.640 ÷ 197.800 189.200 ÷ 250.862 110 ÷...
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Page 8: Mk Boiler Dimensions
2.2 MK BOILER DIMENSIONS Switchboard Burner connections Sight glass Flue connection Flow connection Only for 220 - 280 models Return connection AR-AM Mod. Ø DN Ø mm Ø mm Ø 1020 1½” ½” 1020 1½ ” ½” 1020 1½ ” ½”... -
Page 9: Technical Specifications Of Prk Boilers
2.3 TECHNICAL SPECIFICATIONS OF PRK BOILERS − Steel boiler with pressurized combustion, for heating and hot water systems up to 95° C. − Output: from 260 up to 3500 kW. − Running : light oil and gas. − Cylindrical furnace with flame inversion, detached from the back duct plate, arc-welded on a copper bar. −... - Page 10 PRK 700 PRK 830 PRK 940 PRK 1050 PRK 1200 539 ÷ 698 670 ÷ 830 760 ÷ 940 820 ÷ 1.050 950 ÷ 1.200 Output kcal/h x 1000 463,5 ÷ 600,28 576,2 ÷ 713,8 653,6 ÷ 808,4 705,2 ÷ 903 817 ÷...
- Page 11 PRK 1520 PRK 1870 PRK 2350 PRK 3000 PRK 3500 1.180 ÷ 1.520 1.480 ÷ 1.870 1.830 ÷ 2.350 2.450 ÷ 3.000 2.780 ÷ 3.500 Output kcal/h x 1000 1.014,8 ÷ 1.307,2 1.278,8 ÷ 1.608,2 1.573,8 ÷ 2.021 2.107 ÷ 2.580 2.390,8 ÷...
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Page 12: Dimensions Of Prk Boilers
2.4 DIMENSIONS OF PRK BOILERS Switchboard Burner connection Sight glass Expansion safety connection Cleaning door smoke chamber Flue connection Flow connection Discharge Return connection Note: The clearance "M" is lower than "H" in the models PRK 1050 up to PRK 2350. The connection "AV" is between "AR"... -
Page 13: Switchboard
3. SWITCHBOARD 3.1 SWITCHBOARD General switch with green light Manual reset safety thermostat Burner switch 10. Boiler thermometer System pump switch 15. System pump (inside) Running light system pump 16. Anti-inertia thermostat (inside) Boiler adjustment thermostat 3.2 WIRING DIAGRAM General switch Anti-inertia thermostat System pump switch (PI) System pump... -
Page 14: Terminal Box Connections
3.3 TERMINAL BOX CONNECTIONS 3.4 WATER STORAGE CYLINDER CONNECTIONS Priority thermostat System pump Room thermostat PB Water pump cylinder T.MAX Anti-inertia thermostat (outside) Following these connections you will have this running: − the pump runs only if the boiler exceeds the allowed minimal temperature, −... -
Page 15: Burners
Important: Even if the burner is delivered by ARCA, it has not the same warranty as the boiler. Its warranty depends on the conditions established by its producer. Authorised personnel must effectuate the installation, the first ignition... -
Page 16: Minimal Value Of The Burner Output At First Stage
4.1 MINIMAL VALUE OF THE BURNER OUTPUT AT FIRST STAGE If you have a two-stage burner, the first flame has to be set according to the values shown in the following table in order to prevent boiler corrosion. The smoke temperature is not to be lower than 120°C. MIN. -
Page 17: Jacket Mounting
5.2 JACKET MOUNTING MK 55÷170 − Place the generator Ref.1 in the boiler room and make all hydraulic and smoke discharge duct connections. − Wrap the boiler body with glass fibre insulation Ref.2, by cutting it near the flow duct and fix it by means of Ref.3 holding strips. - Page 18 PRK 320÷740 − Place the generator Ref.1 in the boiler room and make all hydraulic and smoke discharge duct connections. − Wrap the boiler body with glass fibre insulation Ref.2, by cutting it near the flow duct and fix it by means of Ref.3 holding strips.
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Page 19: Anticondensation Pump
5.3 ANTICONDENSATION PUMP In order to avoid system damages caused by unburnt gas condensation, it is necessary to insert a circulating pump between the flow and the return. The anti-condensation output can be calculated as follows: − 1° method = boiler / 45 = l/h −... -
Page 20: Reduced Output Running
6.3 REDUCED OUTPUT RUNNING The reduced output running of MK and PRK boilers can be successfully used during autumn and spring and when the system runs partially. To obtain it extract all the metal spiral coils from ducts. This operation results in an increasing in smoke temperature so that it is necessary to reduce the burner capacity of about 30%. -
Page 21: Boiler Water
6.7 BOILER WATER The boiler water quality is a basic element for its safety and good running. A bad water quality can damage both the boiler and the system. It can result in exchange surface incrustations and corrosions. A water treatment and a steady water control can avoid these consequences. It is advisable to ask for a specialized water treatment and control. -
Page 22: Maintenance
7. MAINTENANCE 7.1 EVERYDAY MAINTENANCE OPERATIONS Maintenance operations must be carried out at least once a year in accordance with local regulations. Maintenance operations must be carried out by lawful personnel, their name has to be written on the "System book". -
Page 23: Door Tightness Control
7.3 DOOR TIGHTNESS CONTROL In case there are door leakages, it is better to tighten the door screwing system after having loosened all lock nuts. If the problem remains, verify the elasticity of the ceramic fibre insulation and, if necessary, replace it. 7.4 BOILER SCALING To extend boiler life and not to cause steel sheet overheating, a periodic scaling is necessary. -
Page 24: Certifications
8. CERTIFICATIONS MK and PRK boilers satisfy the following European regulations: • 92/42/CEE about the efficiency of gas or liquefied combustion boilers. • 90/396/CEE about gas devices. The electrical devices satisfy the following European regulations: • 73/23/CEE about low voltage. •... - Page 25 - PRK -...
- Page 26 ARCA s.r.l. Legal seat with wood and steel boilers production: Via 1° Maggio, 16 - 46030 San Giorgio (Mantova) I P.IVA IT 01588670206 Tel.: (+39) 0376/372206 - Fax: (+39) 0376/374646 E-mail: arca@arcacaldaie.com Wall hung boilers production: Via Papa Giovanni XXIII, 105 - 20070 San Rocco al Porto (Lodi)
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