CHECKLIST FOR KEEPING THE HEAT ON
Contents
1. CHECKLIST FOR KEEPING THE HEAT ON WARNING This work must be performed by a qualified service or maintenance technician GENERAL MAINTENANCE v Check equipment for any physical damage that may have occured over the summer This should include damage to sheet metal fans and air movers wiring gas pipes vent systems and equipment supports v Look for cleanliness of heat exchanger and burners v Check to make certain the vent system has not been compromised and is in the proper working order v Check for obstructions that may be blocking the air inlet or discharge paths of the heat exchanger GAS SUPPLY v Check to make sure that gas mains are turned on v Check inlet pressure and manifold gas pressure to heating equipment to make sure it is properly set v Check gas regulators to be certain regulator vents are not plugged v If propane is being used check main regulator on tanks for proper pressure settings and check for damage to regulators v Check propane tanks for proper size and liquid propane levels GAS CONTROLS v Inspect all gas connections for good tight fits This includes pipe connections to the equipment as well as pilot tubing connections at the gas valve and at the pilot burner v Inspect the main burner gas orifices to make sure they are not blocked with spider webs Check pilot orifice for obstructions if pilot cannot be lit or will not stay lit v After visual and physical inspection of the gas c2. e of the vent pipe may mean improper venting insulation If water marks are observed check that proper vent system has been installed Vent pipe vent cap and cleanout cap clean POWER VENTED POWER EXHAUST UNITS Power venter motor wiring connections tight Pressure switch sensing tube not blocked or damaged With the main gas turned off cycle the thermostat to check the operation of the power venter and verify the safety pressure switch is functioning correctly Vent system safety pressure switch working CHECK THE EXTERIOR COMPONENTS OF THE VENT SYSTEM Damage free proper position no blockage Vent caps Combustion air intake caps Vent extensions CONDENSATE REMOVAL AND DISPOSAL SYSTEMS If gas fired condensing units Condensate lines are free flowing P trap has been primed and filled with water Condensate overflow switch working properly If condensate removal pump is used Condensate pump is working properly THERMOSTATS Check for general cleanliness Check wiring to and from thermostat Check for proper temperature setting
3. f so that it remains on Next turn the thermostat down and observe if the pilot flame has been extinguished After checking the electronic ignition pilot system functionality turn off the power to the unit and reconnect the wire lead to the main valve terminal of the gas valve Restore power and again cycle the unit via the thermostat and observe that both pilot and main burner ignition occurs After checking reset the thermostat to the desired room temperature Direct Spark Systems Turn off the power and main gas to the unit Remove the wire lead from the main valve terminal of the gas valve and protect the wire to prevent shorting Then turn the gas valve control knob to the On position Restore power to the unit but do not restore the main gas Cycle the unit via the thermostat and observe if the direct ignition device is energized If the unit has a hot surface igniter a yellowish glow will appear in a few seconds If the unit has a spark ignition type igniter a sparking sound will be heard and a blue spark may be observed and the igniter After proving the igniter function restore the main gas to the unit and again cycle the unit via the thermostat and observe that both the main burner ignition system is functioning and that main burner ignition occurs After checking reset the thermostat to the desired room temperature On all units observe the burner flame to insure that it is burning clean and not wavering rolling out
4. lifting or fluctuating If an abnormal flame is observed check the equipment installation and service manual or report it to your service technician RECORD KEEPING It is recommended that a record be kept of the date the heating equipment was last checked and serviced Follow all instructions and cautions in the installation operation and service manuals originally provided with the equipment Commercial Products Group Modine Manufacturing Company 1500 DeKoven Avenue Racine WI USA 53403 2552 Phone 1 800 828 4328 HEAT www modinehvac com Modine Manufacturing Company 2013 76 500P Job Name Address City amp State Service Company Supply Voltage Fan or Blower RPM INSPECT UNIT FOR DAMAGE Sheet metal Fan Air mover Gas pipes Vent system Equpment supports INSPECT UNIT FOR DIRT AND DEBRIS Heat exchanger Burner INSPECT VENT INLET AIR SYSTEM Combustion air system clear Heat exchanger clear INSPECT AIR MOVER POWER OFF Lubricate motor bearings if required Motor shaft turns freely Fan or blower wheel not damaged or binding Fan is not loose on motor shaft Blower and motor pulleys are secure Proper belt tension Replace worn belts Power connections to motor secure INSPECT GAS BURNERS GAS OFF Burner clean Clean if required Inside burner tubes free of insects and debris Burner in proper location and correctly aligned Burner fastened secure
5. ly INSPECT GAS CONTROLS GAS OFF Gas supply pipes to equipment damage free Gas connections tight Pilot tubing connections tight at the gas valve Pilot tubing connections tight pilot burner Main burner gas orifices not blocked Pilot orifice not blocked Electrical connections to gas valve tight Thermocouple damage free clean and tight Pilots damage free clean and tight Flame sensors damage free clean and tight Ignition cables damage free clean and tight After inspection of gas controls turn on the gas and check for gas leaks using a water soap solution Do not check for leaks with an open flame All gas lines and connections are leak free MODINE ar Date Model No Serial No Supply Gas Pressure Manifold Gas Pressure GAS SUPPLY Gas mains are on Gas inlet pressure correct Gas manifold pressure correct Regulators are not damaged Gas regulator vents are not plugged If propane is used Proper leve in propane tanks Main regulator proper pressure settings VENT SYSTEM Inspect the entire vent system Vent system is clear and free of obstructions All connections are secure and tight Vent system free from corrosion and damage No leakage of vent products into space No recirculation of vent products into combusion air Vent support system is secure and free of damage No condensate leakage at vent joints Water marks down the outsid
6. ndensate overflow switch to make sure it is working properly THERMOSTATS v Check for general cleanliness v Check wiring to and from thermostat v Check thermostat for proper temperature setting GAS BURNERS v Inspect the burner for general cleanliness If the burner requires cleaning clean with a stiff brush not a wire brush v Inspect inside of burner tubes as much as possible During the summer months it is not uncommon to find that spiders or mice have taken up residence inside the burner v Inspect burner for proper location making sure that it is properly aligned and securely fastened VENT SYSTEMS v Check to make certain vent system is clear and free of any obstructions v Be sure all connections are secure and tight v Inspect the entire vent system for signs of corrosion damage and all potential issues that could lead to vent products entering the heated space or vent products recirculating into combustion air v Clean vent pipe and clean out cap if necessary START UP v Make certain vent support system is secure and free of damage v Check joints of vent for signs of condensate leakage Water marks down the outside of the vent pipe may indicate inadequate venting and or improper vent insulation in unheated spaces If water marks are observed double check to make certain the proper vent system has been installed v If units are the power vented power exhaust type check all the wiring con
7. nections to the power venter motor and the vent system safety pressure switch Also check the pressure switch sensing tube for blockage or damage With the main gas turned off cycle the thermostat to check the operation of the power venter and verify the safety pressure switch is functioning v Check the exterior components of the vent system exterior vent extensions vent weather caps combustion air intake weather caps etc to assure they have not been compromised they are in proper position and that there are not any blockages at the air intakes or vent discharges of the venting system Standing Pilot Systems Turn off the power to the unit Turn on the gas to the unit Turn the gas valve control knob to the pilot position With the gas valve control knob in the pilot position manually depress the knob and light the pilot After 30 seconds release the control knob and assure the pilot remains lit Next turn the gas valve control knob to the On position Restore power to the unit and cycle the unit via the unit thermostat to assure it operates correctly Intermittent Pilot System Turn off the power to the unit Remove the wire lead from the main valve terminal of the gas valve and protect the wire to prevent shorting Then turn the gas valve control knob to the On position Turn on the gas to the unit and restore power Cycle the unit via the thermostat and observe if a pilot flame has been established and i
8. onnection turn on the gas and check for gas leaks using a water soap solution Do not check for gas leaks with an open flame v Check electrical connections to gas valve v Check thermocouple pilots flame sensors ignition cables etc for cleanliness and tightness of connections AIR MOVERS v Lubricate motor bearings if they are not the permanently lubricated type v With the power turned off check to see that the motor shaft turns freely and does not bind This can be done by rotating the fan or blower wheel by hand v Inspect the fan or blower wheel to make sure they are not damaged or binding v Check to make certain fan is not loose on motor shaft If blower units are used make certain the blower and motor pulleys are secure v On blower units check for proper belt tension and also look for signs of belt wear v Check power connections to motor to ensure they are secure and have not vibrated loose over the past heating seasons Note Equipment using belt drives should have the belt tension checked on initial start up Periodic inspection should be made during the heating season to ensure continued proper operation CONDENSATE REMOVAL amp DISPOS SYSTEMS If the units are gas fired condensing units check the following items v Make sure the condensate lines are clear of obstructions and free flowing v Assure the condensate drain line P trap has been primed and filled with water v Check the co
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