PB Heat MI/MIH series manual Air Openings All Air from Indoors on Different Floors

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PREINSTALLATION

where:

Iother = Input of appliances other than fan assisted in Btu/hr

ACH = air change per hour (percent of the volume of the space exchanged per hour, expressed as a decimal)

For fan assisted appliances, calculate the required volume of air using the following equation:

 

15 ft3

I fan

Required Volumefan =

 

 

ACH

1000Btu/hr

 

 

 

 

 

Ifan = Input of the fan assisted appliances in Btu/hr

Note: These calculations are not to be used for infiltration rates greater than 0.60 ACH.

3.Indoor Air Opening Size and Location: Openings connecting indoor spaces shall be sized and located as follows:

a.Combining spaces on the same floor: Provide two permanent openings communicating with additional spaces that have a minimum free area of 1 in2 per 1000 Btu/hr (22 cm2 per 1000 W) of the total input rating of all gas fired equipment but not less than 100 in2 (645 cm2). One opening is to begin within 12 inches (305 mm) from the top of the space and the other is to begin within 12 inches (305 mm) from the floor. The minimum dimension of either of these openings shall be 3 inches (76 mm). See Figure 1.1 for an illustration of this arrangement.

Figure 1.2: Air Openings – All Air from Indoors on Different Floors

4.Outdoor Combustion Air: Outdoor combustion air is to be provided through one or two permanent openings. The minimum dimension of these air openings is 3 inches (76 mm).

a.Two Permanent Opening Method: Provide two permanent openings. One opening is to begin within 12 inches (305 mm) of the top of the space and the other is to begin within 12 inches (305 mm) of the floor. The openings are to communicate directly or by ducts with the outdoors or with spaces that freely communicate with the outdoors. The size of the openings shall be determined as follows:

i.Where communicating directly or through vertical ducts with the outdoors each opening shall have a minimum free area of 1 in2 per 4000 Btu/hr (22 cm2 per 4000 W) of total input rating for all equipment in the space. See Figure 1.3 for openings directly communicating with the outdoors or Figure 1.4 for openings connected by ducts to the outdoors.

Figure 1.1: Air Openings – All Air from Indoors on the Same Floor

b. Combining spaces on different floors: Provide one or more permanent openings communicating with additional spaces that have a total minimum free area of 2 in2 per 1000 Btu/hr (44 cm2 per 1000 W) of total input rating of all equipment. See Figure 1.2 for an illustration of this arrangement.

Figure 1.3: Air Openings – All Air Directly from

Outdoors

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Contents Series MI/MIH Table of Contents Special Attention Boxes Using this ManualInstallation Sequence Accessibility Clearances PreinstallationClearance from Combustible Construction AIR for Combustion and VentilationAir Openings All Air from Indoors on Different Floors Air Openings All Air from Outdoors through Vertical Ducts Planning the Layout Installation SurveyBoiler SET-UP Boiler Supply and Return Water Piping and ControlsParallel Hook-Up with Water Chiller Safety Relief ValveZone Piping with Zone Valves Piping for Zoned SystemsFreeze Protection Expansion TankINDIRECT-FIRED Water Heater Integral Draft Hood Vent Damper Installation GeneralVenting Venting with Vent Damper in Vertical Position Vent Piping and ChimneySeal any unused openings in the common venting system Boiler Removal from Common Venting SystemGas Connection to Boiler GAS PipingMIH Boiler Natural Gas Electrical Wiring ControlsZoned System Wiring Sequence of Operation Wiring and Connection Diagram Intermittent Ignition Intermittent Ignition System Operating Sequence Zone Wiring with Zone Valves Completing the Installation START-UP ProceduresValve Tapping and Adjustment Screw Locations Operating Instructions For Your Safety Read Before Lighting Control Descriptions Adjustment of GAS Pressure RegulatorAdjustment of Pilot GAS Flow Checking Burner Input CHECK-OUT ProcedureSTART-UP Procedures Troubleshooting Guides TroubleshootingProblem Possible Causes Corrective Actions Intermittent Ignition System Troubleshooting Sequence Maintenance Daily with Boiler in USE GeneralWeekly with Boiler in USE Monthly with Boiler in USEStanding Pilot and Main Burner Flame Annually Before Start of Heating SeasonSeries MI/MIH Boiler Dimensions Boiler Dimensions & RatingsRepair Parts Series MI/MIH GAS Boiler Repair Parts2Manifold Manifold/Gas Train MI Standing Pilot 3b Gas Valve and Pilot Intermittent 4Block/Draft Hood 4a Block/Draft Hood 5Jacket 6Controls/Circulator/Vent Damper Series MI/MIH

MI/MIH series specifications

The PB Heat MI/MIH series represents a significant advancement in the realm of cast iron boilers, engineered for high efficiency and reliable performance in both residential and light commercial applications. Crafted with exceptional care, these boilers combine traditional design elements with modern technologies to optimize heating capabilities.

A standout feature of the MI/MIH series is its construction. Made from high-quality cast iron, the boiler body is built to withstand the test of time while providing superior heat retention. This material ensures consistent heating over extended periods, reducing the need for frequent cycling on and off, which enhances overall efficiency.

The MI/MIH series incorporates a versatile design that accommodates various heating systems, including hot water heating and steam applications. This flexibility is a key selling point, as it allows homeowners and business operators to tailor their heating solutions to specific needs. Additionally, the units are compatible with multiple fuels, including oil and natural gas, making them a practical option for diverse environments.

Efficiency is another critical component of the MI/MIH series. The boilers are designed to operate at high efficiency levels, often surpassing industry standards. Many models in this series feature advanced combustion technology that maximizes fuel use while minimizing emissions. This not only supports environmental sustainability but also results in lower utility bills for consumers.

The MIH variant, specifically, offers additional features like an integrated secondary heat exchanger, which enhances heat transfer and further improves efficiency. Maintenance is made simple, thanks to thoughtful engineering. With large clean-out ports and easily accessible components, routine maintenance can be performed with ease, reducing downtime and extending the boiler's lifecycle.

Moreover, safety is a fundamental aspect of the MI/MIH series. These boilers include multiple safety features, such as automatic safety shutdown systems and built-in pressure controls, ensuring safe operation under various conditions.

In summary, the PB Heat MI/MIH series cast iron boilers stand out due to their durability, versatility, high efficiency, and robust safety features. These models cater to a range of heating requirements, making them a reliable choice for those seeking long-term heating solutions that prioritize both performance and sustainability. As homeowners and businesses look for dependable and efficient heating options, the MI/MIH series remains a prominent player in the industry.