MHS Boilers REGENCY 4 MODULEK Series Guida rapida

R E G E N C Y 4

INSTALLATION AND SERVICING

INSTRUCTIONS

FROM 9 TO 16

SECTION

BOILERS COD. 1274061

M O D U L E K

The instructions are designed to assist the installation and servicing engineer

with the installation and maintenance of Regency 4 Modulek series central heat-

ing boilers.

These atmospheric gas fired boilers are floor standing and suitable for heating

large dwellings, commercial or industrial buildings.

They are designed for use on pumped circulation systems and if used for hot

water production, calorifiers, indirect cylinders, plate heat exchangers or any

other indirect method only must be used.

The Regency 4 Modulek series boilers are open flued, natural draught central

heating appliances with outputs ranging from 122,8 kW (418,992 Btu/hr) to

272.4 kW (929,428 Btu/hr).

REGENCY 4 Modulek series boilers are manufactured to the highest standard of quality, per-

formance and safety in accordance with EC standards. The Regency 4 Modulek series boilers

carry the CE mark.

The installation of REGENCY 4 Modulek series boilers must be in accordance with the rele-

vant requirements of the Gas Safety (Installation and Use) Regulations 1994, Health & Safety

at Work Act, Building Regulations, I.E.E. Regulations, Construction (Design & Management)

Regulations 1994, Local Authority Byelaws, Local Gas Undertaking Regulations, Local &

National Water Byelaws, Fire Authority Regulations and Insurance Company requirements.

The following codes of practice are also applicable:

BS6880 Codes of practice for low temperature hot water heating systems of output greater

than 45 kW. Parts 1,2 & 3 : 1988.

CP342 Part 2 : 1974 Code of practice for centralised hot water supply.

BS6644 1991 specification for gas fired hot water boilers of rated inputs between 60 kW and

2 MW.

IGE/UP/2 Gas installation pipework, boosters and compressors on industrial and commercial

premises.

CIBSE Guide Reference sections B7, B11 and B13.

British Gas IM/11Flues for commercial and industrial gas fired boilers and air heaters.

It is the law that all gas appliances are installed by competent persons, i.e. Corgi Registered,

in accordance with above regulations. Failure to comply with regulations could lead to pro-

secution. It is in your own interest and that of safety, to ensure that the law is complied with.

The location chosen for the boiler must permit the provision of a satisfactory flue and an ade-

quate space for servicing and air circulation around the boiler. The boiler room, whether

specifically constructed or a modification of an existing space, should be designed in accor-

dance with BS6644.

The boiler house must be kept clean and the boilers must not be permitted to operate during

the installation of lagging materials or during dust making operations.

CONFORMITY STATEMENT

INSTALLATION REQUIREMENTS

GAS SAFETY (INSTALLATION AND USE) REGULATIONS

LOCATION

INDEX

1 DESCRIPTION

1.1 General remarks

1.2 Boiler models

1.3 Dimensional drawings and list

1.4 Technical data

1.5 Components and accessories

1.5.1 Gas valves used

1.5.2 Boiler components

1.6 Exploded drawings and part list

1.6.1 Exploded view of boiler block and gas assembly

1.6.2 Control panel

2 INSTALLATION AND OPERATING INSTRUCTIONS

2.1 Boiler installation

2.2 Gas supply

2.3 Flue system

2.4 Air supply

2.4.1 Air supply by natural ventilation

2.4.2 Air supply by mechanical ventilation

2.5 Gas connection

2.6 Water connection

2.6.1 System water treatment

2.7 Flue hood assembly

2.8 Draught divertor assembly

2.9 Chimney connection

2.10 Gas assembly

2.10.1 Damper motor connection

2.11 Electrical supply & connection

2.12 Casing assembly

2.13 First lighting and boiler control

2.14 Changing gas type

3 BOILER OPERATING AND MAINTENANCE

Guidance for the User

3.1 Switching the boiler on

3.2 Switching the boiler off

3.3 Warning

3.4 Cleaning the boiler

3.5 High limit safety thermostat

DESCRIPTION

The REGENCY 4 Modulek series appliances are gas fired cast iron sectional boilers whose fea-

tures are high efficiency and low emissions.

The heat exchanger comprises:

- one front section

- a variable number of intermediate sections

- one rear section

connected to each other by means of biconical nipples.

The boiler is fitted with two multi-bar atmospheric gas burners (front and rear) made in stainless

steel, for operation with natural gas or LPG.

A motor-driven damper fitted before the draught diverter helps to reduce heat losses through the

chimney when the burner is switched off.

When Regency 4 Modulek series boilers operate in two stage mode, the damper runs accordingly

in three different situations:

when both burners are switched off, the damper shuts down the chimney, avoiding heat

losses through the chimney;

with one firing burner, the damper partially closes to avoid eccessive secondary air from

passing through the boiler

with both firing burners, the chimney remains completely open .

The control panel provides a selector to choose which of the two gas burners should run, thus

allowing boiler operation at minimum output and equal use of both burners.

To operate in the “ON-OFF” mode (i.e. firing both front and rear burners) the user should push the

relevant button on control panel (see § 1.6.2 for details).

NOMINAL HEAT OUTPUT

Model kW Btu/h

REGENCY 4 MODULEK/152 152.8 521,353

REGENCY 4 MODULEK/169 169.7 579,016

REGENCY 4 MODULEK/186 186.7 637,020

REGENCY 4 MODULEK/203 203.6 694,683

REGENCY 4 MODULEK/220 220.3 751,663

REGENCY 4 MODULEK/237 237.8 811,373

REGENCY 4 MODULEK/255 255.2 870,742

REGENCY 4 MODULEK/272 272.4 929,428

1.1 GENERAL REMARKS

1.2 BOILER MODELS

1.3 DIMENSIONAL DRAWINGS AND LIST

BOILER MODEL Øf Øg La Lf Lg Lm Lr

mm mm mm mm mm mm

Regency 4/152 9 sect. 300 R 1 1/4” 260 760 75 1450 310

Regency 4/169 10 sect. 300 R 1 1/4” 160 710 75 1450 210

Regency 4/186 11 sect. 300 R 1 1/4” 260 860 75 1650 310

Regency 4/203 12 sect. 300 R 1 1/4” 160 810 75 1650 210

Regency 4/220 13 sect. 300 R 1 1/4” 260 960 75 1850 310

Regency 4/237 14 sect. 350 R 1 1/4” 160 910 75 1850 210

Regency 4/255 15 sect. 350 R 1 1/4” 260 1060 75 2050 310

Regency 4/272 16 sect. 350 R 1 1/4” 160 1010 75 2050 210

TECHNICAL DATA

1.4

REGENCY 4 MODULEK boiler models from 9 to 16 sections, which are equipped with

two pilot burners, two main burners, one main switch and one switch for each single burn-

er.

BOILER MODEL 152 169 186 203 220 237 255 272

No. of sections 9 10 11 12 13 14 15 16

Nominal heat input net kW 169.0 187.8 206.5 225.3 244.0 263.3 282.6 302.0

Btu/hr 576,628 640,773 704,578 767,700 832,528 898,379 964,231 1,030,424

Nominal heat output kW 152,8 169,7 186,7 203,6 220,3 237,8 255,2 272,4

Btu/hr 521,353 579,016 637,020 694,683 751,663 811,373 870,742 929,428

Minimum heat input net kW 95/74 94/94 112/95 113/113 139/105 132/132 153/130 151/151

(front/rear burner) Btu/hr(:1000) 324/252 321/321 382/324 385/385 474/358 450/450 522/443 515/515

Minimum heat output kW 86/67 85/85 97/90 102/102 125/95 119/119 138/117 136/136

(front/rear burner) Btu/hr(:1000) 293/228 290/290 331/307 348/348 426/324 406/406 471/399 464/464

Inlet Natural gas mbar 20 20 20 20 20 20 20 20

pressure GPL G30 mbar 30 30 30 30 30 30 30 30

GPL G31 mbar 37 37 37 37 37 37 37 37

Burner Natural gas mbar 11,5 11,5 11,5 11,5 11,5 11,5 11,5 11,5

pressure GPL G30 mbar 29,0 29,0 29,0 29,0 29,0 29,0 29,0 29,0

. GPL G31 mbar 36,0 36,0 36,0 36,0 36,0 36,0 36,0 36,0

Pilot injectors Natural gas Ø mm 0,7 0,7 0,7 0,7 0,7 0,7 0,7 0,7

GPL G30 Ø mm 0,0,5 0,5 0,5 0,5 0,5 0,5 0,5 0,5

GPL G31 Ø mm 0,5 0,5 0,5 0,5 0,5 0,5 0,5 0,5

Burner Natural gas Ø mm 3,6-4,1 4,1-4,1 4,1-4,3 4,3-4,3 4,3-5,0 5,0-5,0 5,0-5,3 5,3-5,3

injectors GPL G30 Ø mm 2,2-2,45 2,45-2,45 2,45-2,55 2,55-2,55 2,55-2,9 2,9-2,9 2,9-3,1 3,1-3,1

GPL G31 Ø mm 2,2-2,45 2,45-2,45 2,45-2,55 2,55-2,55 2,55-2,9 2,9-2,9 2,9-3,1 3,1-3,1

Gas rate Natural gas m3/h 17,9 19,9 21,9 23,8 25,8 27,9 29,9 32,0

(15°C 1013 mbar) GPL G30 kg/h 13,3 14,8 16,3 17,8 19,3 20,8 22,3 23,8

GPL G31 kg/h 13,1 14,6 16,0 17,5 18,9 20,4 21,9 23,4

Water content l 107 117 127 137 147 157 167 177

Flow/return connections Ø 2"1/2 2"1/2 2"1/2 2"1/2 2"1/2 2"1/2 2"1/2 2"1/2

Gas connection Ø 1"1/4 1"1/4 1"1/4 1"1/4 1"1/4 1"1/4 1"1/4 1"1/4

Hydraulic pressure loss mm w.c. 126 140 154 168 182 196 210 224

∆t=10°C @ max. output

COMPONENTS AND ACCESSORIES

1.5

Each boiler includes No. 2 ROBERTSHAW 24V gas valves.

1.5.2 BOILER COMPONENTS

1.5.1 GAS VALVES USED

- On-off switch

- Flue damper assembly with motor

- Twin solenoid gas valves with pressure regulators

- Multi-bar atmospheric gas burner in stainless steel with venturi

- Pilot burners with intermittent operation specific for ionisation

- Ionisation controls

- Ignition and ionisation electrodes

- Illuminated burner lockout reset push-buttons

- Control thermostat

- Overrun relay

- High limit thermostats

- Thermometer

- External flue hood

- Unassembled casing

- Contacts arrangement for external controls

- Option to operate in the “two stage” or in the “on/off” mode

- Option to select either burner to operate for minimum output

BOILER MODEL 152 169 186 203 220 237 255 272

No. of sections 9 10 11 12 13 14 15 16

Volume of combustion chamber m30.087 0.096 0.106 0.115 0.125 0.135 0.144 0.154

Exchange surface m212.2 13.9 15.6 17.3 19.0 20.7 22.4 24.1

Flue gas mass flow g/s 133 142 148 151 156 199 196 193

Flue temperature °C 110 112 115 117 121 110 115 119

Electrical supply 230 V - 50 Hz - 40W

Weight Kg 810 880 950 1,030 1,100 1,180 1,250 1,320

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