THP750 service manual - Temp-Air
Contents
1. Vie bdo con lor of Mua plo pou 2 0 3pm pap apmt i rd Ignition Assembly adjusting screw oO airflow tube connections Airflow Control THP 750 Installation and Service Manual TEMP HEAT Boston MA 800 666 8133 fax 508 624 0036 Chicago IL 800 283 2843 fax 847 931 7704 Cleveland OH 800 443 3301 fax 330 721 7742 Columbus OH 800 444 3481 fax 614 471 1933 Denver CO 800 577 7053 fax 303 783 8579 Detroit MI 800 678 1488 fax 248 526 9527 Duluth MN 888 539 5438 fax 218 722 6701 Minneapolis MN 800 836 7432 fax 612 707 5104 Newark DE 800 232 7419 fax 302 369 8022 Watertown WI 800 558 9209 fax 920 261 4523 RUPP Industries manufactures sells and rents commercial industrial and construction equipment Our employees our most valuable asset are dedicated to finding innovative solutions that fulfill our customers product and service requirements RUPP INDUSTRIES INC One Rupp Plaza 3700 West Preserve Boulevard Burnsville Minnesota 55337 7746 1 800 836 7432 0123 9901 RUPP Industries Inc 1999 Printed in USA2. Do not close liquid supply valve while vaporizer is ON See vaporizer for proper operation of vaporizer Contact your gas company for further information on safe handling of propane vaporizers Allow heater to run until flame safety light goes ON indicating that all gas has been burned from gas lines Caution Check to see that pilot light on vaporizer is extinguished before disconnecting gas lines Turn burner switch OFF Continue running blower until no flame exists in the base of the burner Turn the blower switch OFF Turn power OFF at source and disconnect electrical lines Disconnect propane vapor line from heater Contact gas company to disconnect vaporizer 13 Wiring Sequence of Operation ll ST 01 OL 01 Mrol 230 460 VOLT BK His 00 GO HERTZ 202 So ossssecsnreduewpem iencoslsassse9sessssxi BK Ho 8k ir BK POWE A SURELY Bay Bk p JUMPER Es d OK TR 01 FU 03 SINGLE PHASE BK R BK 1 Ip 4L Te 120V if 230 460V e FU 03 8 pul T FU 03 SN 01 gt nj a LI 01 SENSOR wp soe OL 01 2 ST 01 5 eoe BL p Y D 4 x 99 ER rp aT VA 02 Y SN 02 e in n rw buo HO e i vAN VA 03 TR 03 Fee w x RE 07 Lko2 ora wj TR 02 m B w AM 01 R 9 9 m 960 TS 08 BR 1 BK TS 11 Component Identification AM 01 amplifier SN 02 flame rod T
3. in the ON position check voltage at Terminal 5 If 115 V are present at Terminal 5 and not at Terminal 6 the burner switch is defective Check unit s intake and discharge for obstructions Inspect fan blade and motor for proper operation Adjust airflow control according to the instructions on page 19 Remove airflow tubing and inspect for obstructions Reconnect tubing If voltage is present at Terminal 7 but not at Terminal 8 replace the airflow switch Press reset button on switch If unit continues to shut down the unit is either overfired or the limit switch is defective Contact TEMP HEAT Set at 240 F If unit continues to shut down the unit is either overfired or the limit switch is defective Contact TEMP HEAT Problem Probable C ause Blower runs burner Flame safety control does not ignite lockout Gas valve defective Fuel supply Ignition spark rod improperly gapped TEMP HEAT Remedy Press reset on control If resetting does not correct problem replace flame safety control Check wiring connections and condition to and from gas valves If wiring is in good condition and voltage is present the valves may need replacement Confirm gas supply to unit See Rating Information Table on page 5 for inlet gas supply pressures Bleed air from gas hose Maintain 1 8 in gap as shown on page 19 Replace spark rod as needed Burner ignites does not stay lit Spark rod defective Insufficien
4. maximum 750 000 Inlet Pressure minimum psig 1 2 Natural Gas maximum psig 4 Inlet Pressure minimum psig S Propane maximum psig 10 Electrical Requirements 230 60 1 17 5 230 60 3 10 voltage hertz phase amps 460 60 3 5 Dimensions Ixwxh in 68 x 33 x 65 Weight Ibs 650 Minimum distance from floor in 0 combustible materials top in 6 sides in 6 discharge ft 10 Ambient Conditions minimum F 40 maximum F 120 For inlet pressure over 4 psi natural gas contact TEMP HEAT Control Functions Airflow Switch First Stage Regulator Flame Safety Control High Temperature Limit Low Temperature Limit Manual Gas Valve Manual Bypass Switch Modulating Control Valve Pilot Valve Second Stage Regulator Starter Interlock Thermostat Verifies that proper airflow through unit is present before ignition can take place Reduces tank pressure to an intermediate pressure and supplies inlet pressure to a second stage regulator Senses flame and shuts down the heater in the event of flame failure Opens electric circuit to flame safety control and closes gas valves in the event of an overheating condition Protects against the possibility of discharging freezing air into the building in the event the burner fails to ignite Pre set at 40 F this control shuts the blower down if the temperature through the unit drops below this setpoint Manually shuts off fuel supply at heater For short term shut down only Over rides
5. the automatic shut down of the blower during start up if the temperature through the unit is below the 40 F setting of the Low Temperature Limit control Regulates gas supply to the burner controlled by the remote thermostat Supplies fuel to the ignition pilot when starting unit Reduces the outlet pressure from first stage levels to burner pressure Proves motor starter is engaged in the normally closed position Automatically cycles the heater from low to high fire to maintain desired room temperature THP 750 Installation and Service Manual TEMP HEAT Fuel Supply System Bulk Tank System e Installation must comply with all state and local codes or in the absence of local codes with the standard for the Storage and Handling of Liquified Petroleum Gases ANSI NFPA 58 e Locate fuel tanks according to the minimum distances shown in the Rating Information Table on page 5 e The vapor supply fuel line from the tank or vaporizer must have a first stage regulator located at the tank or vaporizer to reduce the tank pressure to the 10 psi needed to supply unit e A vaporizer may be necessary especially on multiple heater installations where adequate storage supply is not attainable or practicable e Vaporizers must be no closer than 10 ft from a container Locate vaporizers at a minimum of 15 ft from fuel transfer valves Each Storage Capacity Minimum Distance above Ground from Building one 500 gal tank 10 ft o
6. 1 800 836 7432 Temporary Heating Cooling Dehumidifying Ventilating This manual is the property of the owner Leave with the unit when set up and start up are complete For your safety do not use this heater in a space where gasoline or other liquids having flammable vapors are stored or used TEMP HEAT THP 750 Gas Direct Fired Temporary Heater Installation and Service Manual EDI LM MTS 3 Introduction 42 252 2 acere Fev wal eite wht dota we Boe de Gute eve 4 Rating Information 0 0 ccc ence eens 5 Control Functions 0 eee eee hr 6 Fuel Supply System Bulk Tank System 0 0000 e eee eee 7 Natural Gas Installations 0 0 cece eee nes 8 Set Up ac eae ne valentin is die EVEN I eee add E EE eant UA rade SL ee 9 Preliminary Start Up Steps 0 0 eee nes 10 Control Vestibule Layout 0 0 cee ees 11 Start WP STEPS iue eee oet Rt edt dun i eese S Wp ube altel 12 Shut Down Steps seiersen ccc eee ence n 13 Short Term epe bL a vRIPPIGY RP beatae bike 13 Long Term or Disconnect lssseleeeeeeee een 13 Wiring Sequence of Operation 000 ee ees 14 Troubleshooting eek esaet d et Ron E aede eoe e 16 Control Adjustments 0 0 eene 19 npo MC UM 19 Aiow Control 3 aie did a8 eor doe EE 4 Dae Pre EC Cice ge 19 Setting Control ose te ede ads Re ed CR dad one a weld 19 To Check Setting H 0 0 0 ccc eee nee 19 RUPP INDUSTRIES I
7. NC TEMP HEAT Warning ZEN General Hazard Warning Failure to comply with the precautions provided with this heater can result in death serious bodily injury and property loss or damage from hazards of fire explosion burn asphyxiation carbon monoxide poisoning and electrical shock Only persons who can understand and follow the instructions should use or service this heater If you need assistance or heater information such as an instructions manual labels etc contact the manufacturer Fire burn inhalation and explosion hazard Keep solid combustibles such as building materials paper or cardboard a safe distance away from the heater as recommended by the instructions Never use the heater in spaces which do or may contain volatile or airborne combustibles or products such as gasoline solvents paint thinner dust particles or unknown chemicals AN Warning Not for home or recreational vehicle use This heater is designed and approved for use as a construction heater under ANSI Z83 7 1990 We cannot anticipate every use which may be made of our heaters Check with your local fire safety authority if you have questions about applications Other standards govern the use of fuel gases and heat producing products in specific applications Your local authority can advise you about these Introduction The following recommendations are not intended to supplement requirements of federal state or local cod
8. S 04 high temperature limit switch FU 01 main fuse ST 01 motor starter TS 05 cabinet high temperature limit FU 02 control fuse SW 05 blower switch TS 07 low temperature limit switch LI 01 low temperature light SW 06 burner switch TS 08 remote discharge temperature LI 02 burner reset light SW 07 blower start switch TS 11 room override thermostat MT 01 supply blower motor SW 08 blower stop switch VA 01 main gas valve OL 01 starter overload TR 02 low voltage transformer VA 02 second main gas valve PS 01 air flow switch TR 03 ignition transformer VA 03 pilot gas valve RE 07 flame safety relay TS 01 discharge air sensor VA 05 modulating gas valve SN 01 low temperature sensor THP 750 Installation and Service Manual TEMP HEAT When the main safety switch SW 01 is turned ON power is supplied to the line side of the motor starter ST 01 to the primary side of the power transformer TR 01 and from the secondary side of the power transformer to the FU 02 control fuse located on the transformer F2 to 1 2 1 to 3 3 to 5 5 to 6 6 to 7 7 to 8 8 to 9 9 to 10 10 to 6 to 13 n Terminal 1 receives 120 V power from the FU 02 control fuse Terminal 2 is neutral Terminal 3 receives power from Terminal 1 through the blower switch SW 07 or the blower auxillary switch SW 05 Terminal 5 r
9. eceives power from Terminal 3 through the low temperature limit control TS 07 Note the low temperature limit control is a timed thermostat that allows the heater to run for 3 min If the discharge sensor bulb located in the discharge air stream does not meet the 40 F minimum temperature setting of the control the unit shuts down and the low temperature alarm light LI 01 glows To Reset turn blower switch OFF wait 45 sec and turn back ON Terminal 6 receives power from Terminal 5 through the burner switch SW 06 Terminal 7 receives power from Terminal 6 through the supply fan motor starter With proper air flow through unit Terminal 7 supplies power to Terminal 8 through the airflow switch PS 01 Terminal 9 receives power from Terminal 8 through the high temperature limit switch TS 04 Terminal 10 receives power from Terminal 9 through the cabinet high temperature switch TS 05 Terminal 10 supplies power to Terminal 6 within the flame safety control RE 07 Internal circuitry energizes Terminal s 4 8 9 and 10 within the control Terminal 8 of the flame safety control supplies power to Terminal 13 energizing the pilot gas valve VA 03 and the main gas valve VA 01 Note if pilot flame is not present the flame safety control locks out and the control must be reset Terminal 10 of the flame safety control supplies power to Terminal 12 energizing the ignition transformer TR 03 Terminal 9 of the flame safety contro
10. es having jurisdiction over the application and operation of this heater This instruction booklet contains the necessary information instructions and guidelines to achieve maximum efficiency and safety from the TEMP HEAT construction heater Please read all instructions before attempting the set up and operation of this heater The THP Series Heaters are direct fired fresh air heaters used to provide temporary heat for buildings under construction alteration or repair The area of fresh air required for safe operation must be equal to the area of the unit s intake grill THP Series heaters draw fresh outside air through the unit s intake and discharge tempered air controlled by a remote thermostat The heaters generate 85 F to 170 F discharge temperatures with models ranging from 300 000 BTU hour to 4 500 000 BTU hour operating on natural gas or propane gas vapor Equipment with these characteristics are preferred for enclosed areas because they generate lower mois ture and contaminant levels while controlling ventilation and air distribution Most models are equipped with a remote thermostat and an adjustable automatic burner control This combination prevents extreme temperature fluctuations that occur when ON OFF burner controls are selected THP 750 Installation and Service Manual TEMP HEAT Rating Information THP 750 Unit S pecifications For indoor or outdoor installation CFM 4 000 BTU Hour minimum 43 200
11. estibule blower and motor compartments e Heater must be level and in compliance with minimum clearance and minimum distance require ments for combustible materials See Rating Information Table on page 5 Position heater to draw 100 fresh outside air through its intake grill e Do not use or operate the heater in the presence of combustible vapors of liquids Maintain a maximum voltage differential of plus or minus 1046 while unit is running e Protect the hose from traffic building materials and contact with hot surfaces both during use and while in storage e Do not move handle or service heater while hot running or connected to power supply e Check for gas leaks and proper functioning during installation periodically or when relocating discharge air hood extension y manual shut off valve EX from gas supply pressure gauge meter Typical Heater Installation Preliminary Start Up Steps e Check for proper fuel supply application connections and pressure Purge gas line of air as necessary e Leak test all gas connections with a 1 3 solution of soap and water e Do not operate unit if leaks are present e Determine that unit is drawing 100 fresh outside air through its intake grill e Check for proper electrical connections and supply voltage e Check that the intake and discharge of unit are free from obstructions e Reset flame safety control by pressing reset button o
12. l supplies power to Terminal 11 energizing the second main gas valve VA 02 15 Troubleshooting Problem Blower does not operate Probable C ause Inadequate or no voltage present Fuse loose or blown Blower switch not in ON position Motor overload tripped Blower switch defective Unit shuts down on flame safety Low temperature limit switch not at proper setting Defective low temperature limit switch Starter overload defective Defective motor Remedy Check power supply to unit 230 to 460 V must be available Check Rating Information Table on page 5 Check control fuse FU 02 Turn ON Reset With switch in the ON position check for 115 V at Terminal 3 Replace switch if voltage is not present Press reset button on control Timer 3 min Temperature 40 F To Reset turn burner and blower switches OFF and then back ON Check wiring connections Check for 115 V at Terminal 5 If no voltage is present replace switch Replace Check wiring condition and connections from motor starter to motor If motor is receiving proper voltage and wiring is in good condition the motor is defective and must be replaced Blower runs burner does not ignite Burner switch not in ON position Defective burner switch Insufficient airflow High temperature limit switch out of adjustment Adjustable high temperature limit switch not at proper setting Turn ON With burner switch
13. n control e Reset motor overload e Check control settings high temperature limit switch 240 F low temperature limit switch 40 F low temperature light flame relay light O blower switch burner switch O THP 750 Switch Panel THP 750 Installation and Service Manual TEMP HEAT Control Vestibule Layout 8 O x D N ow gt Ta MAXITROL O m nee 8 O io lo N oe m Z e sisisi 9 reset THP 750 Vestibule Layout Item Number Description 1 ignition transformer 2 discharge temperature selector 3 amplifier 4 high temperature limit switch 5 manual reset high temperature limit switch 6 low temperature limit switch T power transformer 8 flame safety control 9 motor starter and motor starter overload 10 24 V transformer 11 terminal strip 12 airflow switch 11 Start Up Steps LO n RB Connect power supply See Rating Information Table on page 5 for electrical requirements Confirm heater is set up for fuel being supplied See Rating Information Table on page 5 for proper gas inlet pressures Plug remote thermostat into thermostat jack on heater Mou
14. ne or two 1000 gal tanks 25 ft 2001 gal or more 50 ft tank fill vapor service valve POL connector NOTE left hand thread first stage regulator reducer union and UL approved 350 psi gas hose HI to temporary heating unit when a vaporizer is not used union hand valve tee first stage regulator street elbow elbow gauge tee R tee v globe valve f union elbow tee shut off valve Liquid inlet line to vaporizer reducer must be schedule 80 black iron pipe or copper tubing of adequate size Contact state or local authorities governing _ EE the installation of vaporizers dripleg to temporary heating unit Typical Vaporizer Installation Algas 40 40 Vaporizer Natural Gas Installations e See Rating Information Table on page 5 for proper inlet pressure e Gas meter and supply system must be able to supply the minimum supply pressures as specified in the Rating Information Table on page 5 e Follow all federal state and local codes governing temporary gas connections e Leak test all gas connections using a 1 3 solution of soap and water THP 750 Installation and Service Manual TEMP HEAT Set Up e Block heater s wheels to prevent movement e Keep fresh air intake and heated air discharge clear of obstruction e Provide clearance to allow access to v
15. nt in an area away from the discharge air stream and set at highest setting Open fuel supply valve at tank slowly Open manual gas valve at heater Reset Flame Safety control Check control settings high temperature limit switch 240 F low temperature limit switch 40 F Turn main disconnect to the ON position Turn blower and burner switches to the ON position For units equipped with electronic low temperature limit control allows unit to run for 3 min If discharge sensor bulb located in the discharge air stream does not reach the 40 F minimum temperature the unit shuts down and the low temperature bulb glows To reset turn blower and burner switches OFF Reset the Flame Safety Control and turn switches back to ON Do not attempt to light the pilot manually 10 Observe flame at both high and low fire ranges High Fire high fire flame produces a discharge temperature approximating 160 F with flame extending 14 in beyond burner Low Fire low fire flame produces a discharge temperature between 85 and 90 F 11 Set remote thermostat to the desired room temperature THP 750 Installation and Service Manual TEMP HEAT Shut Down Steps Short Term Shut Down Turn burner switch to OFF position Wait 30 sec Turn blower switch to OFF position Look to see that flame is extinguished Extended Shut down or Disconnection of Unit With unit running close vapor fuel supply valve at vaporizer Caution
16. t airflow Turn blower and burner switches OFF Check spark rod gap and condition Carefully inspect porcelain insulator for cracks or moisture Replace if necessary Check unit s intake and discharge for obstructions Inspect fan blade and motor for proper operation Adjust airflow control according to the instructions on page 19 Remove airflow tubing and inspect for obstructions Reconnect tubing If voltage is present at Terminal 7 but not at Terminal 8 replace the airflow switch Blower runs burner ignites but unit does not deliver high fire Fuel supply Remote thermostat Confirm gas supply to unit See Rating Information Table on page 5 for inlet gas supply pressure Plug remote thermostat securely into thermostat jack on heater Set at a temperature higher than the indoor air temperature 17 Control Adjustments Ignition 1 Clean and dry electrodes 2 Check porcelain insulators for cracks or moisture Replace if necessary Adjust as shown 4 Secure ignition leads Replace spark electrode if defective Air Flow Control Setting control Turn ON OFF switch to ON 2 With unit operating at high fire turn adjusting screw clockwise until burner goes OFF 3 Turn adjusting screw counter clockwise 1 2 turn at a time until burner re ignites To check setting 1 Set remote thermostat on highest setting 2 Observe that when operating on high fire the switch does not break contact
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