PB Heat MI/MIH series manual Safety Relief Valve, Parallel Hook-Up with Water Chiller

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WATER PIPING AND CONTROLS

6.Install this boiler so that the gas ignition system components are protected from water (dripping, spraying, etc.) during appliance operation and service (circulator replacement, condensate trap, control replacements, etc.).

7.If this boiler and distribution system is used in conjunction with a refrigeration system, pipe the chilled medium in parallel with the boiler and install the proper valve to prevent the chilled medium from entering the boiler. A drawing illustrating this hook- up is provided in Figure 3.2.

8.When the boiler is connected to heating coils located in air handling units where they may be exposed to refrigerated air circulation, install flow control valves or other automatic means to prevent gravity circulation of the boiler water during the cooling cycle.

9. If this boiler is installed above radiation level,

Figure 3.2: Parallel Hook-Up with Water Chiller

provide a low water cutoff device, either as a part of

 

the boiler or at the time of boiler installation.

 

B. SAFETY RELIEF VALVE

1. Locate safety relief valve and fittings in bag assembly.

2. If air elimination is not required at the safety relief valve tapping, install valve and piping as shown in Figure 3.3.

3.For air elimination at the safety relief valve tapping, install valve and piping as shown in Figure 3.4.

CAUTION

Pipe the discharge of safety relief valve to prevent injury in the event of pressure relief. Pipe the discharge to a drain. Provide piping that is the same size as the safety relief valve outlet.

Figure 3.3: Safety Relief Valve Hook-Up

Installation with Air Elimination in

System Piping

Figure 3.4: Safety Relief Valve Hook-Up with

Air Elimination

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Contents Series MI/MIH Table of Contents Installation Sequence Using this ManualSpecial Attention Boxes Clearance from Combustible Construction PreinstallationAccessibility Clearances AIR for Combustion and VentilationAir Openings All Air from Indoors on Different Floors Air Openings All Air from Outdoors through Vertical Ducts Installation Survey Planning the LayoutBoiler SET-UP Water Piping and Controls Boiler Supply and ReturnSafety Relief Valve Parallel Hook-Up with Water ChillerPiping for Zoned Systems Zone Piping with Zone ValvesINDIRECT-FIRED Water Heater Expansion TankFreeze Protection Venting Vent Damper Installation GeneralIntegral Draft Hood Vent Piping and Chimney Venting with Vent Damper in Vertical PositionBoiler Removal from Common Venting System Seal any unused openings in the common venting systemGAS Piping Gas Connection to BoilerMIH Boiler Natural Gas Zoned System Wiring Wiring ControlsElectrical Sequence of Operation Wiring and Connection Diagram Intermittent Ignition Intermittent Ignition System Operating Sequence Zone Wiring with Zone Valves START-UP Procedures Completing the InstallationValve Tapping and Adjustment Screw Locations Operating Instructions For Your Safety Read Before Lighting Adjustment of Pilot GAS Flow Adjustment of GAS Pressure RegulatorControl Descriptions CHECK-OUT Procedure Checking Burner InputSTART-UP Procedures Troubleshooting Troubleshooting GuidesProblem Possible Causes Corrective Actions Intermittent Ignition System Troubleshooting Sequence Maintenance Weekly with Boiler in USE GeneralDaily with Boiler in USE Monthly with Boiler in USEAnnually Before Start of Heating Season Standing Pilot and Main Burner FlameBoiler Dimensions & Ratings Series MI/MIH Boiler DimensionsRepair Parts Repair Parts Series MI/MIH GAS Boiler2Manifold 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.
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