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• Adjust gas input to boiler by removing protective cap on

pressure regulator

and turning screw clockwise

increase input and counterclockwise

to decrease

input.

• Manifold pressures are taken at outlet side of gas

valve.

• To check for proper

ow of natural gas to boiler, divide

input rate shown on rating plate by heating value of

gas obtained from local gas company. This determines

number of cubic feet of gas required per hour.

• With all other gas appliances off, determine

ow of gas

through meter for two minutes and multiply by 30 to

get hourly rate.

• Make minor adjustments to gas input as described

above. See Figure 16 page 18.

• Change burner ori

ces if

nal manifold pressure

varies more than plus or minus 0.3 inches water

column from speci

ed pressure listed on boiler

rating plate.

• Primary air adjustment is not necessary, therefore

air shutters are not furnished as standard

equipment.

CHECK SAFETY CONTROL CIRCUIT

. Test ignition

system safety shutoff device after placing boiler in

operation. Figure 15 page 19.

Intermittent Pilot:

With main burner operating, turn

pilot gas adjusting screw clockwise

until pilot

gas is turned off. Within 90 seconds main gas control

closes, shutting off gas to main burner.

High Limit Control

: Remove plastic cover and

note temperature setting. Refer to appendix A for

adjustment procedure. Decrease setting to minimum

and operate boiler. When boiler water temperature

exceeds control temperature setting, control will open

circuit, closing automatic main gas valve.

Figure 21.

14 - CHECKING GAS INPUT RATE TO BOILER

Figure 21 - High Limit Control Location

Burner Access

Door

Gas Valve

High Limit and

Operating Control

ces

Содержание MGB-100J

Страница 1: ...13501 web site www ecrinternational com MGB SERIES II CAST IRON GAS FIRED BOILERS FOR FORCED HOT WATER INSTALLATION OPERATION MAINTENANCE MANUAL Models MGB 50J MGB 75J MGB 100J MGB 125J MGB 150J MGB 170J MGB 200J An ISO 9001 2008 Certified Company Tested For 100 psi ASME Working Pressure C S A Certified For Natural Gas Or Propane ...

Страница 2: ... 4 30 36 1 75 15 5 30 37 1 100 15 6 30 37 1 125 18 6 30 37 1 150 18 7 30 37 1 170 22 7 30 38 1 200 22 8 30 38 1 Propane gas inlet all units 1 2 DIMENSIONS 1 Return 1 1 1 1 B 14 4 4 1 Supply 2 A D 4 4 4 B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B C 3 1 1 1 1 3 27 5 3 Figure 1 Dimensions ...

Страница 3: ... in death or serious injury DANGER Indicates a hazardous situation which if not avoided WILL result in death or serious injury IMPORTANT Read the following instructions COMPLETELY before installing KEEP THIS MANUAL NEAR BOILER RETAIN FOR FUTURE REFERENCE WARNING Keep boiler area clear and free from combustible materials gasoline and other flammable vapors and liquids DO NOT obstruct air openings t...

Страница 4: ...input rate 4 for every 1000 ft 304m above sea level 2 Net AHRI Water Ratings shown based on piping and pickup allowance of 1 15 Consult manufacturer before selecting boiler for installations having unusual piping and pickup requirements such as intermittent system operation extensive piping systems etc For forced hot water systems where boiler and all piping within area to be heated boiler may be ...

Страница 5: ...practical 7 Allow 24 inches 610mm at front and right side for servicing and cleaning 8 When installed in utility room door should be wide enough to allow largest boiler part to enter or to permit replacement of another appliance such as water heater WARNING Fire hazard Do not install boiler on combustible flooring or carpeting Failure to follow these instructions could result in death or serious i...

Страница 6: ...H greater than 0 60 Volume 21 ft3 ACH x Total Input Mbh о Refer to National Fuel Gas Code for opening requirements between connection indoor spaces All Outdoor Air Provide permanent opening s communicating directly or by ducts with outdoors о Two Permanent Opening Method Provide opening commencing within 12 inches of top and second opening commencing within 12 inches of bottom enclosure Direct com...

Страница 7: ... of the relief valve outlet over the entire length of discharge line have no intervening shutoff valve between safety relief valve and discharge to atmosphere do not plug or place any obstruction in discharge line terminate freely to atmosphere where any discharge will be clearly visible and at no risk of freezing allow complete drainage of the valve and the discharge line be independently support...

Страница 8: ...ion 5 Hot water boilers and system must be filled with water and maintained to minimum pressure of 12 psi 6 Bypass piping is optional which gives ability to adjust supply boiler water temperature to fit system or condition of installation This method of piping however is not typically required for baseboard heating systems Typical installations where bypass piping is used are as follows A This met...

Страница 9: ...RNING Burn and scald hazard Safety relief valve could discharge steam or hot water during operation Install discharge piping per these instructions 8 Install discharge piping from safety relief valve See Warning Page 7 4 CONNECTING SUPPLY AND RETURN PIPING BOILER ALTERNATE CIRCULATOR LOCATION TO SYSTEM FROM SYSTEM V2 V1 CIRCULATOR SHUT OFF VALVE PRESSURE REDUCER VALVE CHECK VALVE BALL VALVE AIR SE...

Страница 10: ...10 4 CONNECTING SUPPLY AND RETURN PIPING Figure 6 Single Zone System With DHW Figure 7 Multi Zone System With Circulators And DHW ...

Страница 11: ...11 4 CONNECTING SUPPLY AND RETURN PIPING Figure 8 Multi Zone System With Zone Valves And DHW With Circulator Figure 9 Multi Zone System With Zone Valves And DHW With Zone Valve ...

Страница 12: ...enting system 2 Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction leakage corrosion and other deficiencies which could cause an unsafe condition 3 Insofar as is practical close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located an...

Страница 13: ...usted to match total current draw of all controls associated with boiler during heating cycle 7 VENT DAMPER INSTALLATION INSTRUCTIONS Figure 10 Damper Motor Wiring Figure 11 Vent Damper Placement DAMPER INSTALLATION Follow Damper installation instructions provided with damper See Figure 10 Damper Motor Vent Outlet Vent Damper D D D D Damper Wire Haness Dam Dam Dam Dam Dam Dam Dam Da Da H H H H Ha ...

Страница 14: ...iping Pressure test boiler and gas connection before placing boiler in operation Pressure test over 1 2 psig 3 5 kPa Disconnect boiler and its individual gas shutoff valve from gas supply system Pressure test at 1 2 psig 3 5 kPa or less Isolate boiler from gas supply system by closing manual gas shutoff valve Locate leakage using gas detector noncorrosive detection fluid or other leak detection me...

Страница 15: ...tat on outside wall 3 Do not install thermostat where it will be affected by drafts hot or cold pipes sunlight lighting fixtures televisions fireplace or chimney 4 Check thermostat operation by raising and lowering thermostat setting as required to start and stop burners 5 Instructions for final adjustment of thermostat are packaged with thermostat adjusting heating anticipator calibration etc WAR...

Страница 16: ...ntegrated High Limit Electronic Ignition Control 240008781 I Inducer is not an option WARNING Modification substitution or elimination of factory equipped supplied or specified components may result in personal injury or loss of life ...

Страница 17: ...17 10 WIRING DIAGRAM Figure 14 Integrated High Limit Electronic Ignition Control 240008781 ...

Страница 18: ...18 10 WIRING DIAGRAM Figure 15 Integrated High Limit Electronic Ignition Control 240008781 ...

Страница 19: ... Appliance and call qualified service technician or your gas supplier TO TURN OFF GAS TO THE APPLIANCE 1 Set the thermostat to lowest setting 2 Turn off all electric power to the appliance if service is to be performed 3 Push in gas control knob slightly and turn clockwise to OFF DO NOT FORCE 4 Call qualified service technician WARNING If you do not follow these instructions exactly a fire or expl...

Страница 20: ... if used to expel any air accumulated in the system Check entire piping system and if any leaks appear have them repaired Circulators need to be checked and maintained Refer to circulator manufacturer s instructions Inspect venting system at the start of each heating season Check vent pipe from boiler to chimney for signs of deterioration by rust or sagging joints Repair if necessary Remove vent p...

Страница 21: ...e pilot flame Be sure to replace cover screw after adjustment to prevent possible gas leakage See Figure 16 Page 19 Check burners and pilot for signs of corrosion rust or scale buildup Area around boiler must be kept clear and free of combustible materials gasoline and other flammable vapors and liquids Free flow of combustion and ventilating air to boiler and boiler room must not be restricted or...

Страница 22: ...e Primary air adjustment is not necessary therefore air shutters are not furnished as standard equipment CHECK SAFETY CONTROL CIRCUIT Test ignition system safety shutoff device after placing boiler in operation Figure 15 page 19 1 Intermittent Pilot With main burner operating turn pilot gas adjusting screw clockwise until pilot gas is turned off Within 90 seconds main gas control closes shutting o...

Страница 23: ...olex plug connectors have not worked loose during transit Check sensing bulb is fully inserted in well and is not loose A 3 Adjusting Settings To discourage unauthorized changing of settings procedure to enter adjustment mode is required To enter adjustment mode press UP DOWN and I buttons simultaneously for three seconds Press and release I button until parameter requiring adjustment is displayed...

Страница 24: ...e retry Flame signal was lost during state 7 or 8 and delay is called before retry 32 second delay 13 Soft lock out Soft lockout duration is one hour may override with manual reset 14 Hard lock out Manual reset is required for hard lockout 15 Wait for limit to close Possible thermostat call for heat limit switch is open 16 Flame out of sequence Flame signal sensed before trial for ignition Appropr...

Страница 25: ... and display On retry models wait for retry or reset at thermostat Check for correct installation and wiring before replacing any component Control module cannot be repaired If it malfunctions it must be replaced Use only qualified service agent to service ignition systems 1 Perform checkout as first step in troubleshooting Check troubleshooting guide to pinpoint cause of problem See Table 6 page ...

Страница 26: ...ockout is reset after one hour if alarm reason disappears 63 Soft lockout maximum number of recycles exceeded Soft lockout 64 Soft Lockout electronics failure On board self diagnostics detected error Soft lockout 65 Over temperature error Sensor measured temperature in excess of maximum allowable limit Soft lockout Note Soft lockout time is 1 hour or manual reset Hard lockout requires manual reset...

Страница 27: ...ace damaged wire Check for cracked ceramic insulator which can cause short to ground and replace igniter sensor if necessary At gas valve disconnect main valve wire from MV terminal Turn on power and set thermostat to call for heat Pilot should light main burner will remain off because main valve actuator is disconnected Check pilot flame Verify it is blue steady and envelops 3 8 to 1 2 in 10 to 1...

Страница 28: ...UTICA BOILERS 2201 Dwyer Avenue Utica NY 13501 web site www ecrinternational com ...

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