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Hastings IST-100 Installation And Service Manual

Indoor/outdoor heating and individual duct furnaces
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Installation and Service Manual
Individual Duct Furnaces
Read These Instructions Before Installation
Inspect unit on arrival for any shipping damage. If any part is missing or damaged, notify the
transportation company.
This unit has been test fired for at least 15 minutes to prove out all phases of operation
Indoor/Outdoor Heating

RECEIVING INSTRUCTIONS

and
Notice
IST DUCT FURNACE SYSTEMS
OCTOBER 2016

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Summary of Contents for Hastings IST-100

  • Page 1: Receiving Instructions

    IST DUCT FURNACE SYSTEMS OCTOBER 2016 Installation and Service Manual Indoor/Outdoor Heating Individual Duct Furnaces Notice Read These Instructions Before Installation RECEIVING INSTRUCTIONS Inspect unit on arrival for any shipping damage. If any part is missing or damaged, notify the transportation company.

  • Page 2: General Safety Information

    WARNING FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury, death or property damage. Be sure to read and understand the installation, operation and service instructions in this manual. Improper installation, adjustment alteration, service or maintenance can cause serious injury, death or property damages.

  • Page 3: Table Of Contents

    Table of Contents Receiving Instructions ..........1 Venting General Safety Information ........2 Venting for Outdoor Units ......... 11 Model Designation ........... 4 Venting for Indoor Units ........11 Configuration Designations ........4,5 Vent Termination Clearances ......12 Performance Data ..........5,6 Single Pipe Venting ...........

  • Page 4: Model Designation

    Model Designation Model Configuration IST - (X) - (X) - (X) - (X)- I - Indoor RA - Space Heating A - Single Bank Input IS - Indoor / Two Pipe Separate Combustion Air OA - Make-up Air B - Double Bank O - Outdoor MA - Heating and Ventilating C - Triple Bank Configuration Designations...

  • Page 5: Performance Data

    Table 1 - CFM Requirements for Single Bank Furnace Air Temperature Rise Input Output Model 30°F 40°F 50°F 60°F 70°F 80°F 90°F (Btu/Hr) (Btu/Hr) Airflow (CFM) IST-100 100,000 80,000 2468 1850 1480 1234 1058 IST-150 150,000 120,000 3702 2777 2221 1851...
  • Page 6 Performance Data Table 2 - CFM Requirements for Double Bank Furnace Air Temperature Rise Input Output Model 70°F 80°F 90°F 100°F 110°F 120°F (Btu/Hr) (Btu/Hr) Airflow (CFM) IST-200 200,000 160,000 2115 1850 1645 1480 1346 1234 IST-300 300,000 240,000 3173 2777 2468 2221...

  • Page 7: Dimensions

    Dimensions (All dimensions are in inches) V-bank Filtered Mixing Blower Furnace Weatherhood Discharge Filter Plenum 31.9 Section Dimensions 10.8 OPN’G Cabinet Size IST - 100 Thru 37.1 34.4 IST - 200 OPN’G IST - 250 Thru 43.6 44.4 IST - 400 Furnace Discharge Dimensions are in inches.

  • Page 8: Components (General Location)

    Components (General Location) Furnace Section Furnace Components: (see Figure 1) 1. Flame Rod 2. Venter Proving Switches 3. Combustion Blower 4. Collector Box 5. High Limit Switch 6. Ignition Module 7. Modulation Control 8. Fuse 9. Supply Power Terminal Strip 10.

  • Page 9: Shipping

    Refer to section on Maintenance for recommended frequency. Hoisting Unit The weight of the systems are available by contacting Hastings HVAC Inc. Furnaces contain lifting lugs attached to the base rails. Use spreader bars between lifting cables to prevent damage to the furnace. (Figure 3.)

  • Page 10: Clearances

     Clearances Be sure frame or support is square, level and not twisted. Required minimum clearances from furnace sections  Field fabricated curb should be insulated with at to combustible material are as follows: least 1 1/2” thick rigid type insulation. Table 4 ...

  • Page 11: Altitude

    Altitude Do not connect the furnaces to other vent systems. Each furnace must have its own vent pipe and vent For U.S. installations at elevations above 2,000 feet terminal. (610 m), the appliance shall be de-rated 4 percent for each 1,000 feet (305 m) of elevation above sea level. Do not directly attach an elbow to the exhaust venter For Canadian installations, appliances are certified outlet.

  • Page 12: Vent Termination Clearances

    Vent Termination Clearances Vent Termination Clearances (USA) Vent Termination Clearances (Canada) For U.S.A. standards vent systems must conform to In Canada vent systems must conform to the latest the latest edition of the National Fuel Gas Code edition of the Natural gas and Propane Installation (NFPA 54) and the latest edition of NFPA 211, or Code (CSA-B149.1 or CSA-B149.2), or as follows: as follows:...

  • Page 13: Single Pipe Venting

    Indoor Venting 6” Diameter vent pipe. Type Single Pipe Venting “B” recommended for external of building. Approved Cap Standard single pipe venting uses air inside the building for combustion. The air enters the furnace through the louvered panel. Exhaust is vented 2 ft.

  • Page 14: Separate Two Pipe Venting

    Indoor Venting Separate Two Pipe Venting 6” Diameter vent pipe. Type “B” recommended for external Separate two pipe venting systems use outside air Approved Caps of building. for combustion and vent exhaust to outdoors Two pipe systems require two penetrations through a side wall or roof.

  • Page 15: Gas Piping

    Gas Piping IMPORTANT WARNING All piping must conform to the latest edition of the Check all gas connections for leaks before placing national fuel gas code ANSI Z223.1 and any unit in service. A soap and water solution should be applicable local codes.

  • Page 16: Electrical Connection

    Electrical Connections Gas Valves Combination Valve (Single and Two-Stage) WARNING Disconnect all electric power before servicing. Failure to disconnect power before servicing can cause severe personal injury or death. Refer to wiring diagram shipped with unit for all wiring connections. Wiring diagrams are located inside furnace control access panel.

  • Page 17: Firing Rate

    Modulating Valve Setting Firing Rate Setting Firing Rate Setting Firing Rate Two Stage A two stage furnace manifold consists of a single input burner manifold and a two stage combination valve. Two stage control fires the burner at either high fire or low fire.

  • Page 18: Single Stage

    Setting Firing Rate 3. Turn on system power. Set thermostat to call for heat. Main burner should light. Single Stage  High Fire Adjustment A single stage furnace manifold consists of a 4. Rotate selector dial to maximum temperature single input burner manifold and a single stage setting.

  • Page 19: Split Manifold

    Setting Firing Rate 15. Force valve to low fire stage by disconnecting wire from the high fire terminal. Be careful not to Split Manifold - 4 Stage with Modulation Section allow wire to come in contact with any other part. 16.

  • Page 20: Sequence Of Operation

    Sequence Of Operation Heat Cycle Split Manifold - The modulated section of the split When the Season Switch (SW) or customer provided manifold ignites. As the demand for heat increases contact (CU) (via DDC or BMS) calls for the burner the modulated section will modulate towards high fire.
  • Page 21 Troubleshooting: LED codes Status LED Codes Pattern LED Blinking Indicates Inspect/Solutions Pattern Short Flashing Control powered (without call for Heat) Heartbeat Call Normal Operation for heat 1. Air proving switch is jumpered or miswired. Venter proving switch closed when 2. Blockage in tubing connecting venter to proving should be open switch.
  • Page 22 Lockout: Low voltage on 24VAC 1. Check transformer voltage 7 + 2 input 7 + 3 Contact Hastings HVAC Lockout: Flame Rod shorted to 1. Switch power off and check flame rod and flame 7 + 4 ground or there is a big leakage rod wiring.

  • Page 23: Troubleshooting

    General Trouble Shooting  Gas Odor SHUT OFF GAS SUPPLY IMMEDIATELY! Possible Cause Corrective Measures 1. Leaking gas or burner manifold Use an electronic combustible gas indicator to locate gas leaks on piping to unit, and internal piping and gas controls.
  • Page 24 General Trouble Shooting  Burner shutdown before call for heat is satisfied Possible Cause Corrective Measures 1. Faulty High limit switch Check all wiring to high limit. Check that high limit switch is closed. If switch is open and no heat is being applied replace switch.

  • Page 25: Maintenance

    Maintenance Notice: Automatic Gas Valve The heater and vent system should be inspected by Confirm that the combination gas valve is operating a qualified service technician on an annual basis. properly. Service should occur before each heating season. 1. Set thermostat so that the furnace will begin operation.
  • Page 26 Maintenance Belts and Sheaves Blower Motors Twice a year check belts and sheaves for alignment Some small motors have sealed bearings which and belt tension. require no relubrication. Motors with regreasable bearings are shipped with a high quality, wide When a belt is replaced, shorten center distance temperature range grease in the bearings.

  • Page 27: Technical Support

    For needed parts, appliance data, or assistance on a service problem, contact the service department of Hastings HVAC, Inc. Be sure to have the following information ready when contacting us. 1. Model and serial number of unit.

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