Hastings DIRECT GAS FIRED ELECTRIC STEAM, Installation And Service Instructions Manual

Page 1: ...ISSB 1 August 2011 Installation and Service Instructions DIRECT GAS FIRED ELECTRIC STEAM AND HOT WATER NOTICE Read These Instructions before installation ...

Page 2: ...OUR SAFETY If you smell gas 1 Open windows 2 Don t touch electrical switches 3 Extinguish any open flame 4 Immediately call your gas supplier WARNING Improper installation adjustment alteration service or maintenance can cause property damage injury or death Read the installation operating and maintenance instructions thoroughly be fore installing or servicing this equipment FOR YOUR SAFETY The us...

Page 3: ...rouble Shooting the Direct Gas Fired Unit 15 M Trouble Shooting the Electric Unit 17 N Trouble Shooting the Steam or Hot Water Unit 18 SECTION 4 Illustrations Unit Assembly Figure 1 20 Unit Assembly Figure 2 21 Unit Suspension Figure 3 22 Unit Suspension Figure 4 23 Unit Assembly and Suspension Figure 5 24 Unit Assembly and Suspension Figure 6 25 Duct Connections Figure 7 26 Remote Control Panel F...

Page 4: ...re shipped in the same manner as explained above All options and accessories are shipped mounted and wired whenever possible within the limitations of ship ping and handling Any accessories which include wiring that are shipped separate i e intake or discharge dampers require no additional conduit or wiring in the field All wire leads will be tagged for reconnection in the field The SB unit is des...

Page 5: ...ner The burner is a direct fired non premix design with cast iron manifold and stainless steel mixing plates A spark ignited intermittent pilot for natural or propane gas at inlet pressure from 6 ounces through 1 pound is standard The burner is capable of a 22 1 turndown ratio Maximum temperature rise is 119 F 5 Gas and electric Controls The following are furnished as standard components on all di...

Page 6: ...tain there is enough clearance for opening and removing access doors Special attention should be given to supply if required and discharge duct connections Electrical power and control hook up points and steam or hot water supply and return lines if required should also be noted This in formation should be cross checked with the position of support beams and stand pipes to insure that support stru...

Page 7: ...lation All gas piping must comply with Standard of National Board of Fire Underwriters and all applicable local codes Contact factory if exact gas piping dimensions are required Standard pipe caps are furnished on manifold for shipment from factory Run correctly sized gas line to unit Install manual shut off valve and regulator if not already installed Note gas line pressure must be as shown on sp...

Page 8: ...afety lockout red light marked lockout See typical remote control panel illustrated in Figure No 8 in this manual b Optional remote control panel s Same as described above but with the addition of lights and switches de pending upon options ordered 8 Remote Control Panel Specifications Signal Lights Pilot lights are rectangular neon type for 115 V A C service Lights are UL approved and have 18 AWG...

Page 9: ...parate sections All sections are shipped in a horizontal position SB 112 through SB 218 has top mounting channel and base channel shipped assembled with blower burner section SB 222 through SB 240 has top mounting channel shipped as one section but not physically attached to either blower or burner section see Figure No 10 Unit base assembly is shipped separately for field connection to mounting c...

Page 10: ...ing the unit 1 Remove any shipping blocks from gas units only a High limit switch if mercury bulb type mounted on burner cabinet Remove limit switch cover remove paper blocking and tilt mercury bulb to reset b Gas pressure switch es if required may have shipping screws Remove screws if supplied c Unit programming controller may be shipped with a paper shipping block Remove programmer cover and rem...

Page 11: ...s over grooves or sheaves as this results in permanent belt damage 19 Open hand valve and pilot cock 20 Move season switch to winter position to light pilot blower must be operating Amber signal light marked heating should indicate that the burner is operating If pilot does not light depress reset button on programming relay If it becomes necessary to adjust pilot flame check the micro ampere read...

Page 12: ...is causes the valve to call for continuous high fire 2 Remove cap A and turn adjusting screw B to desired low fire adjustment see page 11 3 Replace cap A and reconnect wire to terminal 8 NOTE If calibration of the amplifier or remote temperature selector is necessary place an accurate tem perature measuring device as near the discharge air sensor as possible Set the remote temperature at least 10 ...

Page 13: ...H VALVE ADJUSTMENTS 11 ...

Page 14: ...tch is in the summer position and the three position blower switch is in the on posi tion power is supplied to the blower motor starter Blower relay and blower delay timer must be operational Blower motor will run if blower motor overloads are not tripped Heater is inoperative System white light in remote control panel will be on if auxiliary blower motor starter contacts are closed Optional clogg...

Page 15: ...ar and adjustment See data below 5 Burner Check orifice openings annually contact factory for proper orifice drill size for cleaning Filters check filters at least once each season and clean or replace as necessary Standard filters are of the heavy duty fiberglass mesh throw away type No attempt should be made to clean and re use these filters Replacement filters should be an equivalent to the typ...

Page 16: ...E BELOW DEFLECTION TABLE Belt Cross Section marked on belt Motor Pulley Pitch Diameter Deflection Force Minimum Maximum A 3 0 3 6 2 62 lbs 3 25 lbs 3 8 4 8 3 lbs 4 lbs 5 0 7 0 3 25 lbs 5 lbs B 3 4 4 2 3 lbs 5 lbs 4 4 5 6 4 lbs 5 87 lbs 5 8 8 6 5 25 lbs 7 87 lbs 14 ...

Page 17: ...ial and flashing as required The unit manufacturer will not assume responsibility for leaks if the curb adaptor gasket provided by others and sealing tape provided by others are not used Be careful not to allow gaps where two pieces of sealing tape meet Unit is now ready for setting on the roof SBD 222 227 233 and 240 require a field fabricated sheet metal skirt around base of unit Contact factory...

Page 18: ...properly f Air proving switch is open due to under or over velocity See Item 2b note g Spark gap is approximately 3 8 h Flame rod wire and spark ignition wire for loose connections and or reversed wires i Any electrode insulators are cracked replace as required j Pilot gas valve is open and that pilot has been lit purge pilot gas line to eliminate any air k A three to four micro amp reading for pi...

Page 19: ...er motor must be full open b Low limit temperature control setting too high or n c over riding timer contacts open c Access door switch es open NOTE If other optional controls are supplied on special applications check to see if they are in the electrical circuit 2 If blower runs but remote control panel blower light doesn t come on auxiliary starter contact in magnetic motor starter not closing 3...

Page 20: ...ose and slipping or blower is running backwards Also check to see if air proving sensing tube is plugged or has been crimped 3 If blower operates and blower signal light is on but system fails to heat air to desired temperature check to see if a Season switch in remote control panel is in winter position b Heating relay contacts are closed c Two position or modulating valve and controller if modul...

Page 21: ...4 petcock in a riser off the condensate return ahead of the trap The petcock should be left open for continuous venting Vent air lines should not be re turned to the condensate return main 10 If condensate must be lifted above coil return level into overhead mains or if return mains are pressurized a pump and receiver should be installed between condensate traps and return mains Most of the common...

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Page 36: ...3606 Yost Avenue Hastings Nebraska 68901 1966 Phone 402 463 9821 Fax 402 462 8006 www hastingshvac com E mail sales hastingshvac com ...