Service Manual ISEBD-1
Contents
1. A and reconnect wire to terminal 8 TROUBLE SHOOTING CHART First make certain of fuel and power supply A closed hand shut off valve blown fuse in main power supply line or burner control circuit is often the cause of trouble Make sure voltage at the control box is within plus or minus ten volts of that specified Individual control instruction sheets are provided with unit These together with the schematic wiring diagram should provide the necessary information to find the problem Some general checks to make are given below Nature of Trouble Possible Causes Corrective Measures 1 Fans do not operate 2 Safety relay does not go through component check after blower starts Pilot does not light Flame relay does not pull in Pilot lights but main burner does not light No electrical supply Loose wire leads Main disconnect switch not fully closed Blown fuses Linestarter holding coil defec tive Fan motor defective Starter out on overload Air switch not closing Burner switch open Defective relay Open limit circuit Pilot valve defective Ignition system defective Flame relay s load relay con tacts dirty Air in gas line Flame sensor connection loose Flame sensor not located properly Moisture on sensor Main valve defective Modulating valve not opening Defective flame relay Check entrance cable Check all fan circuit connections See that switch2. knives are fully in serted Locate and replace Check terminals with test light If current is present replace coil Replace or repair Reset Adjust Close Replace Adjust find cause Check and replace Check spark gap ignition cable transformer and cracked insulator on electrode Clean Purge Check and repair or check for cracked insulator See instructions on flame rod loca tion and set accordingly Replace Check and replace See Maxitrol Trouble Shooting Guide Replace EBD HORIZONTAL MODEL BASE UNIT EBD 112 THRU 128 t BLOWER MOTOR D OPN G I r r r rr P 4 1 pe b a de de ke de o un de u H l Z CONTROL COMPARTMENT i C i ui SANI FE JH SERVICE ACCESS DOORS gt PLAN VIEW ELECTRICAL COMPARTMENT F OPN G B OPN G GAS MANIFOLD COMPARTMENT FRAME SIDE ELEVATION HR 1 ARRANGEMENT A SIDE ELEVATION HR 2 ARRANGEMENT s A B c Do E LF 6 hH tts Kf L 16 7 124 32 9 64 39 3 16 40 ta a o Ton e e 22 212 10 126 51 1 8 58 1 8 40 else o mve 230 o 124 M SERVICE ACCESS DOOR J E NGS aa HA hE 3606 Yost Avenue Hastings Nebraska 68901 1966 Phone 402 463 9821 Fax 402 462 8006 www hastingshvac com E
3. to Off position Wait five minutes Push reset button on electronic relay Push manual reset button on gas pressure switches starters and limit control if necessary The unit is equipped with a modulating gas valve which is controlled by a discharge sensor lo cated in the discharge opening Check to see that the sensor is properly positioned Set the selector dial for desired discharge temperature Check if limit control is locked at 180 deg F discharge temperature Check all gas piping for leaks Turn on main power Before firing the burner check the motor belts and pulleys for proper adjustment etc Turn the blower switch on and run the fans Check the current draw of the motor If the motor current is excessive adjust the variable speed pulley standard through 10 hp on the motor to lower the amp draw on the motor Caution Current readings should be taken with the access door in place Set temperature controller s to call for heat Open hand valve and pilot cock Set season switch to Winter position The pilot will light and then the main flame will come on The burner will come on at high fire initially then gradually modulate down While the unit is on high fire check the flame length It must be approximately 14 18 beyond end of burner Check the manifold pressure should not exceed operating pressure noted on unit spec plate Check temperature rise and or gas rate If too high set at desired r
4. ISEBD 1 AA evar A Installation and Service Instructions Direct Fired Make Up Air Systems EBD Series Notice Read These Instructions Before Installation Please refer to Model and Serial Number when corresponding with the factory The purpose of the following instructions is to present a guide for proper installation and operation of this equipment We recommend that this manual be readily available to operating personnel for reference as an aid for trouble diagnosis and proper maintenance This equipment shall be installed and wired in accordance with the regulations of the Na tional Board of Fire Underwriters National Electric Code the American National Standard Fuel Gas Code Z223 1 and local governing bodies which should be followed carefully in all cases Authorities having jurisdiction should be consulted before installations are made Local codes may require additional safety controls access door interlocks low temperature warning buzzer etc GENERAL INFORMATION FACTORY FLAME TEST All Hastings heaters are given a complete flame test and safety control check out before shipping A copy of the flame test report is available upon request CHECK UP ON ARRIVAL All heaters are thoroughly checked by a shipping inspector before they are accepted by the car rier Upon arrival the heater should be inspected by the customer If any damage has occurred in transit an immediate claim should be filed with the carrier Du
5. ate by reducing high fire setting for MR or M modulating valve If no high fire adjustment is available reset modulat ing control to design temperature rise plus current outdoor temperature to approximate full in put If input is too low increase setting on main regulator M valve only but not past point where no further pressure increase is evident With burner running reset modulating control point less than incoming air temperature to drive valve to low fire position Then gradually re duce low fire stop or bypass till fire tends to go out Increase to the smallest stable 1 1 1 2 flame length full length fire If a local weak spot appears check for clogged low fire air ports or extreme turbulence at affected portion Make low fire adjustments patiently Due to low gas flow rate response to adjustments will be slow Wiring Diagrams MT 1 12 miele TS1007 TS114 TS114 TD114 TRANS TD114 T115 TRANS 5 VALVE f N i i AN DOG a 69 SON OQ O 209 IQ O formel N 77 90 ar y LO FIRE LO FIRE SWITCH SWITCH An O en i i O sep d Z SERIEI OJOJOO gue Figure 2 FER BASIC SYSTEM WITH INLET AIR BASIC SYSTEM WITH ROOM OVERRIDE bei JESE z EE JE 4 5 6 7 8 Temperature Calibration DECREASE E AY INCREASE MODEL NO A1014 SENSITIVITY DO g NOT Note The components of this system are individually calibrated and are not part of a matched set When it has been posit
6. e 2 Remove seal cap A Figure 6 and turn regulator pressure adjusting screw to obtain desired manifold pressure Clock wise rotation increases pressure 3 Reconnect the wires to terminal 4 MODULATOR Figure 6 MR212 VEN i Valve 3 SE Low Fire or By Pass Adjustment Tr 1 Disconnect wire from terminal 8 in the Amplifier Figure 4 this causes valve to call for continuous low fire 2 Remove cap B Figure 6 and loosen lock screw C Turn D to desired low fire adjustment Clockwise rotation reduces mini mum flow rate 3 Tighten set screw C replace cap B and reconnect wire to ter minal 8 M611 Valve High Fire Manifold Adjustment 1 Disconnect wires from terminal 4 in the Amplifier Figure 4 this causes the valve to call for continuous high fire 2 Adjust the pressure regulator to obtain the desired manifold pressure 7 w c maximum 3 Reconnect the wires to terminal 4 r a Figure 7 Low Fire or By Pass Adjustment 1 Disconnect wire from terminal 8 in the Aplifier Figure 4 This causes valve to call for continuous low fire 2 Remove cap A Figure 7 and turn adjusting screw B to de sired low fire adjustment Use 1 8 Allen Wrench For convenience two adjustment positions are provided on opposite sides of the valve Usually The less accessible of these is in the closed position so the desired setting can be made from the front of the manifold 3 Replace cap
7. e to the widely varying conditions un der which heaters are transported to the job unloaded and installed it is impossible for Hastings to assume responsibility for handling in transit Check to see if unmounted items are included with ship ment HANDLING THE HEATER The heater has lifting lugs for crane hook up Hooks jacks or chains must not be applied around casing or control box INSTALLATION POSITIONING THE HEATER Heater should be installed so that it is level Allow 48 clearance at the front and control side of the heater and 18 on the bottom top and other side Air intake to the unit should not be restricted in any manner Install heater such that the ignition control system is not directly exposed to water spray rain or dripping water Lift unit with suitable spreader bar at the 4 points on the support frame or proper lifting equip ment WIRING Electrical connections must be in accordance with all local and national codes If not supplied by the factory provide an electric switch having adequate ampacity see specifica tion plate on heater for voltage and ampacity and shall be installed in accordance with Article 430 of the National Electrical Code ANS NFPA 70 Refer to markings on heater control box for locations for field installed wiring and control wiring PIPING Gas piping should be sized adequately in accordance with the American National Standard Fuel Gas Code Z223 1 Main gas pressure reg
8. ively determined that there is calibra tion problem with the entire system the most convenient component may be used to correct the calibration It is necessary to place an accurate temperature measuring device as near the Discharge Air Sensor as possible Set the Remote Temperature Selector at least 10 deg above outside air temp eratures If calibrating at the Amplifier adjust calibration potentiometer A Figure 4 until temperature reads the same as the set temperature If the temperature is below the set point then rotate calibration potentiometer A clockwise If the temperature is above the set point rotate the potentiometer counter clockwise Figure 4 MAMITROL OVERRIDE TEMPERATURE SELECTOR DIAL Figure 5 If calibrating the Remote Temperature Selector if measured temperature is below set temperature rotate the calibration poten tiometer A Figure 5 clockwise until the correct temperature is ob tained If the temperature is above the set point the potentiometer A should be turned counter clockwise Proceed slowly with the above steps so as to allow the temperature measuring instrument to catch up with the change in temperature Valve Adjustments Note Low fire adjustment should be checked whenever the high fire adjustment is changed MR 212 Valve High Fire Manifold Adjustments 1 Disconnect wires from terminal 4 in the Amplifier Figure 4 This causes the valve to call for continous high fir
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10. ulator is field installed by installer RX TYPICAL OPERATING SEQUENCE Blower switch should be turned on to start the fan Placing season switch in winter position ener gizes the gas control system If all limit switches are satisfied the pilot valve will be opened and pilot gas automatically spark ignited When the flame sensor senses the pilot flame the main valve will be opened through terminals on the flame safeguard relay The modulating gas valve will control the flow of gas to the burner to maintain the discharge temperature The controller should be set for the desired discharged temperature START UP INSTRUCTIONS After the heater has been positioned and all service connections made complete the following check up before starting the unit Keep in mind the fact that the heater may have been subject to se vere jolts during transportation and handling The check up is essential to make sure that the heater is inthe same operating condition as it was at completion of the factory flame test 1 OS a GJEN GR 10 11 12 13 14 15 16 17 18 Make sure all field wiring and gas piping are in accordance with local and national codes Check incoming power making sure it is the same as the nameplate voltage Refer to heater rating plate for determining the minimum gas supply pressure for obtaining the maximum gas capacity for which this heater is specified Close gas hand valves and pilot cock Set all switches
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