PB Heat MI Series Guide

USER’S INFORMATION MANUAL
SERIES MI/MIH™GAS BOILERS
TO THE INSTALLER: This manual is the property of the owner and must be affixed near the boiler for
future reference.
TO THE OWNER: This boiler should be inspected annually by a Qualified Service Agency.
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
TO BE COMPLETED BY THE INSTALLER
Service Agency Phone No.
Address
Boiler Model No. Serial No. Date of Installation:
– Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
– WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electrical switch;
do not use any phone in your building.
•Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire
department.
– Installation and service must be performed by a qualified
installer, service agency or the gas supplier.
PB HEAT, LLC
131 S. CHURCH ST • BALLY, PA 19503
MI8039 R6 (6/11-4M)
Printed in U.S.A.
©2011 PB Heat, LLC. All rights reserved.

Basic Operation
WARNING
CAUTION
Service on this boiler should be undertaken only by trained and skilled personnel from a
qualified service agency.
Should overheating occur or the gas supply fail to shut off, do not turn off or disconnect the
electrical supply to the pump. Instead, shut off the gas supply at a location external to the
appliance.
Do not use this boiler if any part has been under water. Immediately call a qualified service
agency to inspect the boiler and to replace any part of the control system and any gas control
which has been under water.
A. General. This water boiler is a natural draft appliance and is equipped with controls for proper
operation. All controls must be in proper working order. Contact a qualified service agency to provide
annual maintenance as specified in Installation, Operation and Maintenance Manual.
1. Limit. See Figure 1. A device which automatically interrupts boiler operation when the water
temperature exceeds the set point. Maximum allowable temperature is 240°F (115°C).
Original equipment with this boiler is a Honeywell L8148E1182. Boiler operation is interrupted
when system temperature reaches cut-out temperature. Boiler operation resumes automatically
when system temperature falls approximately 15°F (8°C) below the cut-out temperature. See also
Figures 4 and 5 for limit sequence of operation.
2. Flame Rollout Switch. See Figure 1. A device which automatically interrupts boiler operation
when flames or excessive heat are present in the combustion area. The control is a single use
device. If the control is activated to interrupt boiler operation, do not attempt to place boiler in
operation. Contact a qualified service agency.
3. Blocked Vent Switch (Vent Safety Shutoff Switch). See Figure 1. A device which automatically
interrupts boiler operation when there is a blockage in the vent pipe or chimney. The control is a
manual reset device. The control is located on the draft hood relief opening. If the control was
activated to interrupt boiler operation, do not attempt to place boiler in operation. Contact a
qualified service agency.
4. Pilot. The pilot provides the ignition source for the main burners. Your boiler has a standing
(continuous) pilot or an intermittent pilot. The intermittent pilot ignites only when there is a call for
heat and extinguishes when the call for heat ends. See Figures 6 and 7.
5. Gas Valve. The gas valve monitors pilot flame and regulates gas flow to the burners and pilot. See
Figure 1.
6. Safety Relief Valve. A device which protects the boiler against excessive pressure. The safety
relief valve can discharge a large amount of hot water - the installer should provide piping to
discharge water near floor at a floor drain. If the safety relief valve discharges water, follow
instructions TO TURN OFF GAS TO APPLIANCE (see Figure 2 or 3), and contact a qualified
service agency.
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Figure 1: Control Locations
B. Instructions to place boiler in operation and to turn off the boiler are shown on the Operating or
Lighting Instruction Label posted on the left side of the boiler. The instructions are also shown in
Figures 2 and 3.
C. The Sequence of Operation is shown in Figures 4 and 5.
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SV9501/SV9601 9318 REV 3
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly, a fire or explosion may
result causing property damage, personal injury, or loss of life.
OPERATING INSTRUCTIONS
TO TURN OFF GAS TO APPLIANCE
1. Set the thermostat or operating control to lowest
setting.
2. Turn off all electric power to the appliance if service is
to be performed.
3. If the gas valve is not visible, remove the control
access panel.
4. Slide the gas control switch to "OFF".
5. Replace control access panel, if applicable.
1. STOP! Read the safety information above on this
label.
2. Set the thermostat or operating control to lowest
setting.
3. Turn off all electric power to the appliance.
4. This appliance is equipped with an ignition device
which automatically lights the pilot. Do not try to light
the pilot by hand.
5. If the gas valve is not visible, remove control access
panel.
6. If the gas control switch is not in the "OFF" postion,
slide the switch to "OFF".
7. Wait five (5) minutes to clear out any gas. Then smell
for gas, including near the floor. If you smell gas,
STOP! Follow "B" in the safety information above on
this label. If you don't smell gas, go to the next step.
8. Slide the gas control switch to "ON".
9. Replace control access panel, if applicable.
10. Turn on all electrical power to the appliance.
11. Set thermostat or operating control to desired setting.
12. If the appliance will not operate, follow the
instructions "To Turn Off Gas To Appliance"
and call your service technician or gas supplier.
A. This appliance is equipped with an ignition device
which automatically lights the pilot. Do not try to
light the pilot by hand.
B. BEFORE OPERATING smell all around the appliance
area for gas. Be sure to smell next to the floor
because some gas is heavier than air and will settle
on the floor.
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance
Do not touch any electric switch;
do not use any phone in your building.
Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
If you cannot reach your gas supplier,
call the fire department.
C. Use only your hand to slide the gas control switch.
Never use tools. If the switch will not slide by hand,
don't try to repair it, call a qualified service technician.
Force or attempted repair may result in a fire or
explosion.
D. Do not use this appliance if any part has been under
water. Immediately call a qualified service technician
to inspect the appliance and to replace any part of the
control system and any gas control which has been
under water.
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Figure 2: Intermittent Ignition Operating Instructions

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Figure 3: Standing Pilot Lighting Instructions

6
Figure 4:
Intermittent Ignition Sequence of Operation
Figure 5:
Standing Pilot Sequence of Operation

User Maintenance
7
WARNING
Product Safety Information
Refractory Ceramic Fiber Product
This appliance contains materials made from refractory ceramic fibers (RCF). Airborne RCF,
when inhaled, have been classified by the International Agency for Research on Cancer (IARC),
as a possible carcinogen to humans. After the RCF materials have been exposed to
temperatures above 1800°F (980°C), they can change into crystalline silica, which has been
classified by the IARC as carcinogenic to humans. If particles become airborne during service
or repair, inhalation of these particles may be hazardous to your health.
Avoid Breathing Fiber Particulates and Dust
Suppliers of RCF recommend the following precautions be taken when handling these materials:
Precautionary Measures:
Provide adequate ventilation.
Wear a NIOSH/MSHA approved respirator.
Wear long sleeved, loose fitting clothing and gloves to prevent skin contact.
Wear eye goggles.
Minimize airborne dust prior to handling and removal by water misting the material and
avoiding unnecessary disturbance of materials.
Wash work clothes separately from others. Rinse washer thoroughly after use.
Discard RCF materials by sealing in an airtight plastic bag.
First Aid Procedures:
Inhalation: If breathing difficulty or irritation occurs, move to a location with fresh clean air.
Seek immediate medical attention if symptoms persist.
Skin Contact: Wash affected area gently with a mild soap and warm water. Seek immediate
medical attention if irritation persists.
Eye Contact: Flush eyes with water for 15 minutes while holding eyelids apart. Do not rub eyes.
Seek immediate medical attention if irritation persists.
Ingestion: Drink 1 to 2 glasses of water. Do not induce vomiting. Seek immediate medical
attention.

WARNING
Service on this boiler should be undertaken only by trained and skilled personnel from a
qualified service agency. Inspections should be performed at intervals specified in the
Installation, Operation and Maintenance Manual and this User’s Information Manual. Maintain
manuals in a legible condition.
Keep boiler area clear and free of combustible materials, gasoline and other flammable vapors
and liquids.
Do not place any obstructions in boiler room that will hinder flow of combustion and
ventilation air.
A. General Housekeeping (Continuous).
1. Keep boiler area clear and free of combustible materials and obstructions to the free flow of
combustion and ventilation air to the boiler.
2. Do not store or use gasoline or other flammable vapors or liquids in the vicinity of the boiler or any
other appliance.
3. Do not store or use sources of hydrocarbons in the vicinity of the boiler. Sources of hydrocarbons
include bleaches, cleaners, chemicals, sprays, paint removers, fabric softeners and refrigerants.
B. Inspect Vent System (Monthly).
1. Vent pipe must be continuous to chimney with no separations, obstructions, or sags. Vent pipe
must be supported at minimum 4 foot (122 cm) intervals and secured with sheet metal screws.
2. Chimney must not have signs of continuous wetness. If signs of continuous wetness are observed,
contact a qualified service agency.
C. Inspect Pilot and Main Burner Flames (Monthly).
1. Remove control access panel (lower front jacket panel) by lifting and pulling out.
2. Adjust thermostat to lowest setting.
3. Loosen screws at Burner Observation Cover and remove cover by lifting. See Figure 1.
4. Adjust thermostat to highest setting. Verify operation follows Sequence of Operation (see Figure
4 or 5).
5. View flames through observation port. See Figure 1.
6. Check pilot flame. See Figures 6 and 7. The pilot flame should be medium blue covering
approximately 3/8" to ½" (10 to 12 mm) of the sensing probe. If the flame is yellow and lazy, follow
instructions TO TURN OFF GAS TO APPLIANCE (see Figures 2 and 3), and contact qualified
service agency.
7. Check main burner flames. See Figures 6 and 7. The flames should have clearly defined inner
cones approximately 1½" (40 mm) high and should have a very sharp blue color characteristic. If
the flame is yellow and lazy, follow instructions TO TURN OFF GAS TO APPLIANCE (see Figures
2 and 3), and contact qualified service agency.
Burner Observation Cover may be hot
CAUTION
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8. Adjust all thermostats to lowest setting to shut down boiler.
9. Replace burner observation cover and control access panel.
10. Adjust thermostats to normal setting.
D. Controls (as required by control manufacturer)1.
1. Safety Relief Valve. Conduct try lever test as outlined in manufacturer’s instruction tag on the
safety relief valve.
2. Low Water Cut-off (if used). Follow instructions provided by control manufacturer.
E. General Inspection and Maintenance (Annual). For continued safe operation a qualified service
agency must provide a more detailed inspection of burners, heat exchanger and vent system, and
provide maintenance as specified in the Installation, Operation and Maintenance Manual.
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Figure 7: Intermittent Ignition Pilot Configuration and Flames
Figure 6: Standing Pilot Configuration and Flames
1Controls maintenance may be part of annual inspection and maintenance by a qualified service agency if annual frequency is
xspecified by controls manufacturer.