A NEMA 4 enclosure can reduce exposure to environmental contaminants. See Electronic Ignition Service Manual, form The maintenance program should include regular checkout of the system as outlined under Checkout, page If the appliance normally operates at very high temperatures, insulation, shielding, and air circulation may be necessary to protect the controls. Proper insulation or shielding should be provided by the appliance manufacturer; make sure adequate air circulation is maintained when the appliance is installed.
Read these instructions carefully. Failure to follow them could damage the components or cause a hazardous condition. Check the ratings given in the instructions and on the components to make sure they are suitable for your application. Installer must be a trained, experienced service technician.
After installation is complete, check out component operation as provided in these instructions. HEAT The controls can be damaged by excessively high temperatures. Make sure the maximum ambient temperature at the control locations will not exceed the rating of the. Disconnect the power supply before making wiring connections to prevent electrical shock or equipment damage.
Check the wiring diagram furnished by the appliance manufacturer, if available, for circuits differing from the wiring hookups shown. Carefully follow any special instructions affecting the general procedures outlined below. As shown in the wiring diagrams, a common ground is required on: a. The pilot burner mounting bracket, and b.
Make sure the transformer has adequate VA. The ignition module requires at least 0. Add the current draws of all other devices in the control circuit, including the pilot and main valves in the gas control, and multiply by 24 to determine the total VA requirement of these components. Add this total to 4. The result is the minimum transformer VA rating. Use a Class II transformer if replacement is required. Using the wiring harness supplied, insert the matching pin plug into receptacle on case and other end to vent damper.
Once a module with vent damper plug has powered a vent damper circuit, it cannot be used in a gas system without a vent damper. A non-replaceable fuse in the module blows on initial power-up. To install: 1. NOTE: The cable must not run in continuous contact with a metal surface or spark voltage will be greatly reduced.
Use ceramic or plastic standoff insulators as required. Cable must be no longer than 36 in. Protect both ends with insulated boots. Then, install adapter and cable to the S ignition module. Connect Ignition Cable Use Honeywell ignition cable or construct an ignition cable that conforms to suitable national standards such as Underwriters Laboratories Inc.
See Tables 2 and 3. The burner serves as the common grounding area. If there is not good metal-to-metal contact between the burner and ground, run a lead from the burner to ground. Strip the other end of the wire and fasten it under the igniter bracket mounting screw.
If necessary, use a shield to protect the ground wire from radiant heat. Ground Control System The igniter, flame sensor, and ignition module must share a common ground with the main burner. If necessary, use a shield to protect the wire from radiant heat generated by the burner. Connect the ground wire as follows:. Connect Gas Control Use No. Connect to gas control terminals as shown in wiring diagrams, using terminals appropriate to the gas control. Adjust thermostat heat anticipator to match system current draw.
The current draw equals the total current required for the ignition module 0. Remember, however, that a vent damper should not be used in an fan-assisted combustion system or an LP gas system and that the vent damper plug must not be removed except to connect the module to a D80D with the plug-in cable.
SA,B can be substituted in these drawings by simply connecting the igniter and sensor as shown in Figs. Never use a vent damper in an LP gas system or in a fan-assisted combustion system. Connect Ignition Module 1. Connect remaining system components to the ignition module terminals as shown in the appropriate wiring diagram, Figs.
To connect the D80B, follow the wiring diagrams supplied with the vent damper or see Fig. Remove the wires from the 25V 2 and TH-R terminals on the old module. Connect these two wires with a solderless connector. Tag and remove the remaining wires from the old module. Remove the old module and mount the new one in the same location.
Reconnect the remaining wires as shown in Table 4. Increase the thermostat anticipator setting by 0. Bubbles indicate gas leaks. Tighten joints and screws or replace component to stop gas leak.
Recheck with soap and water solution. If you smell gas or suspect a gas leak, turn off gas at manual service valve and evacuate the building. Do not try to light any appliance, do not touch any electrical switch or telephone in the building until you are sure no spilled gas remains. Gas leak test must be done as described in Steps 1 and 5 below on initial installation and any time work is done involving the gas piping. Maintenance intervals are determined by the application.
Make sure main burner and pilot flames go out. Recheck with soap and water. This step applies to lockout and continuous retry modules only. See device label. Ignition sequence should start again followed by shutoff after 90 seconds maximum.
As you do Steps 4 and 5, watch for points where operation deviates from normal. Refer to Troubleshooting Chart to correct problem.
When the module is used in an atmospheric system, the call for heat energizes the module. In either case, the module first initiates a 45 second. After prepurge, the module starts the pilot ignition sequence.
Module operation can be conveniently divided into two phases for S and three for S The flame sensing circuit in the module detects the flame current, shuts off the spark generator, and energizes the second main valve operator. The second main valve opens and gas flows to the main burner, where it is ignited by the pilot burner.
On lockout models, the flame current also holds the safety lockout timer in the reset normal operating condition. When the call for heat ends, both valve operators are deenergized, and both valves in the gas control close. Then the module goes into safety lockout. Lockout de-energizes the first main valve operator and closes the first main pilot valve in the gas control, stopping pilot gas flow. The control system must be reset by setting the thermostat below room temperature for one minute or by turning off power to the module for one minute.
A timer in these models starts timing the moment the trial for ignition starts. Ignition spark continues only until. The first main valve opens, which allows gas to flow to the pilot burner. At the same time, the electronic spark generator in the module produces an over 10, volt spark pulse output.
If the pilot does not light, or the pilot flame current is not at least 1. SA,F will continue to spark as long as the thermostat calls for heat, or until the pilot lights. STEP 3: Check spark ignition circuit. You will need a short jumper wire made from ignition cable or other heavily insulated wire. STEP 2: Check ignition system grounding. Nuisance shutdowns are often caused by a poor or erratic ground. Make sure connections are clean and tight. If the wire is damaged or deteriorated, replace it with No.
Perform the checkout on page 12 as the first step in troubleshooting. Then check the appropriate troubleshooting guide Fig. If troubleshooting indicates an ignition problem, see Ignition System Checks below to isolate and correct the problem. Following troubleshooting, perform the checkout procedure page 12 again to be sure system is operating normally. If any component does not function properly, make sure it is correctly installed and wired before replacing it.
On lockout and retry models, meter readings between gas control and ignition module must be taken within the trial for ignition period.
Once the ignition module shuts off, lockout models must be reset by setting the thermostat down for at least one minute before continuing.
On retry models, wait for retry or reset at the thermostat. The following service procedures are provided as a general guide. Verify power at module input terminal. Replace module if fuse and power okay. Voltage output is okay. STEP 4: Check pilot and main burner lightoff.
Check table below. The ignition circuit generates over 10, volts and electrical shock can result. Check continuity of ignition cable and ground wire. Clean flame rod. Check electrical connections between flame rod and module. Check for cracked ceramic flame rod insulator. Check that pilot flame covers flame rod and is steady and blue. Adjust pilot flame. If problem persists, replace module. NOTE: If ground is poor or erratic, shutdowns may occur occasionally even though operation is normal at the time of checkout.
If no voltage, replace module. If okay, replace gas control or gas control operator. If voltage is okay, replace gas control; if not, replace module. Replace vent damper if necessary. Take protective action to shield cable and boot from excessive temperatures.
Check line voltage power, low voltage transformer, limit controller, thermostat controller and wiring.
Also, check air proving switch on combustion air blower system if used and that vent damper if used is open and end switch is made. Following adjustment, always replace pilot adjustment cover screw and tighten firmly to assure proper gas control operation. Replace damaged wire with moisture-resistant No. The pilot should light but the main burner will remain off because the main valve actuator is disconnected.
See Fig. If checks are okay, replace module. If okay, replace gas control. Check line voltage power, low voltage transformer, limit controller, thermostat and wiring. Also, check air proving switch on combustion air blower system and that vent damper if used is open and end switch is made.
S is similar except the timing circuit includes a purge timer. Applicable only to boilers: a. Determine that the circulating water pumps are in operating condition.
Applicable only to warm air heating appliances. Check both limit controller and fan controller for proper operation. Limit controller operation can be checked by temporarily disconnecting the electrical supply to the blower motor and determining that the limit control acts to shut off the main burner gas.
Return doors, windows, exhaust fans, fireplace dampers and all other fuel-burning appliances to their previous conditions of use. Test for spillage at the draft hood relief opening after 5 minutes of main burner operation.
Use a draft gauge, the flame of a match or candle, or smoke from a cigarette, cigar or pipe. Visually determine that main burner gas is burning properly; i. Adjust the primary air shutter s as required.
If appliance is equipped with high and low flame control or flame modulation, check for proper main burner operation at low flame. Determine that the pilot is burning properly and that main burner ignition is satisfactory by interrupting and re-establishing the electrical supply to the appliance in any convenient manner.
Place in operation the appliance being inspected. Follow the lighting instructions. Adjust thermostat so appliance will operate continuously. Do not operate a summer exhaust fan. Close fireplace dampers. If, after completing steps 7 through 12, it is believed sufficient combustion air is not available, refer to 1. Insofar as is practical, close all building doors and windows and all doors between the space in which the appliance is located and other spaces of the building.
Turn on clothes dryers. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will. Inspect heat exchangers for cracks, openings or excessive corrosion. Shut off all gas to the appliance and shut off any other fuel-burning appliance within the same room. Use the shutoff valve in the shutoff valve in the supply line to each appliance.
Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restrictions, leakage or corrosion or other deficiencies which could cause an unsafe condition. Conduct a Gas Leakage Test of the appliance piping and control system downstream of the shutoff valve in the supply line to the appliance.
The following procedure is intended as a guide to aid in determining that an appliance is properly installed and is in a safe condition for continuing use. This procedure is predicated on central furnace and boiler installations equipped with an atmospheric gas burner s and not of the direct vent type.
It should be recognized that generalized test procedures cannot anticipate all situations. Accordingly, in some cases, deviation from this procedure may be necessary to determine safe operation of the equipment. This procedure should be performed prior to any attempt at modification of the appliance or the installation. If it is determined there is a condition which could result in unsafe operation, the appliance should be shut off and the owner advised of the unsafe condition.
The following steps should be followed in making the safety inspection:. Applicable only to boilers. Applicable only to furnaces. Check both the limit controller and the fan controller for proper operation. Limit control operation can be checked by blocking the circulating air inlet or temporarily disconnecting the electrical supply to the blower motor and determining that the limit controller acts to shut off the main burner gas.
No adjustments should be made other than those recommended by the system manufacturer. Determine that the pilot is igniting and burning properly and that main burner ignition is satisfactory by interrupting and re-establishing the electrical supply to the appliance in any convenient manner. Make this determination with the appliance burner both cold and hot. Perform this step as many times as is necessary to satisfy yourself that the automatic intermittent pilot system is operating properly.
If the appliance is equipped with high and low flame control or flame modulation, check for proper main burner operation at both high and low flame. Adjust the thermostat to its highest temperature setting, and test manifold pressure and adjust the pressure regulator to match original input as required refer to Exhibit A, step 9b.
Visually determine that main burner is burning properly; i. Make certain wiring connections are tight and wires are positioned and secured so they will not be able to contact high temperature locations. Check the heat anticipator in the comfort thermostat to determine if it is properly adjusted to the current draw of the control system.
Determine that the appliance transformer has adequate capacity by following the steps outlined below: a. Compute the approximate current draw by adding the current draw of the automatic intermittent pilot system to 1 the current draw of the associated valving, and 2 the current draw of any relays or other devices operated by the transformer.
Multiply the total current draw as computed above by 24 V to determine the total VA volt-ampere required. The total VA volt-ampere required should be equal to or less than the VA rating of the transformer. If the total VA volt-ampere required is greater than the VA rating of the transformer, the transformer must be replaced with a Class 2 transformer of adequate rating.
Shut off all gas and electricity to the appliance. To shut off gas, use the shutoff valve in the supply line to the appliance. Do not use the shutoff valve which is provided as part of a combination control. Perform a safety inspection of the existing appliance installation. See Exhibit A for a recommended procedure for such a safety inspection. Prior to beginning this procedure, a preliminary examination of the appliance and the automatic intermittent pilot system should be made to determine that the automatic intermittent pilot system can be properly applied to the appliance.
This procedure is intended as a guide to aid in safely installing a listed automatic intermittent pilot system on an existing listed appliance equipped with an atmospheric gas burner s and not of the direct vent type. This procedure is based on the assumption that the history of the specific installation has been one of safe and satisfactory operation. This procedure is predicated on central furnace and boiler installations, and it should be recognized that generalized procedures cannot anticipate all situations.
The following steps should be followed in making the modifications:. Follow these warnings exactly: 1. Disconnect power supply before wiring to prevent electrical shock or equipment damage. To avoid dangerous accumulation of fuel gas, turn off gas supply at appliance service valve before starting installation and perform Gas Leak Test after completion of installation.
Do not bend pilot tubing at the control or pilot after compression nut has been tightened. Gas leakage at the connection may result. Mounting bracket must remain vertical. Mounting surfaces other than the main burner may shift, bend, or warp as furnace expands and contracts while operating.
Supply pilot flame with ample air free of combustion products. Do not impinge pilot flame on adjacent parts. Do not expose pilot flame to falling scale, which could impair main burner ignition. Do not expose pilot flame to drafts that push or pull pilot flame away from the igniter-sensor. Follow appliance manufacturer instructions if available; otherwise, use instructions provided below.
Failure to follow instructions can damage product or cause a hazardous condition. Check ratings given in instructions and on product to make sure product is suitable for your application. Make sure installer is a trained, experienced service technician.
After completing installation, use these instructions to check out product operation. They consist of a target type pilot burner with a combination spark igniter and flame sensor mounted in place of the thermocouple. Connect the control module ground wire to one of the igniter-sensor mounting screws to complete the system grounding.
Connect ground wire as follows: 1. Fasten female quick-connect to wire end at ignition module. Strip other end and fasten under igniter-sensor mounting screw. If necessary, use shield to protect lead from radiant heat of burner. The pilot burner serves as the grounding area for the flame signal. Run lead from pilot burner to the common ground selected. Connect the ignition cable as follows: 1.
The high tension ignition cable must conform to applicable local or national standards. While holding tubing all the way in, engage threads and turn until finger tight. Using a wrench, turn compression nut one turn beyond finger tight. Do not overtighten. Connect other end of tubing to gas control according to gas control manufacturer instructions. NOTE: When replacing a control, cut off old compression fitting and replace with new compression fitting provided with new pilot burner.
Never use old compression fitting because it may not provide a gas-tight seal. Do not make sharp bends or deform tubing.
Do not bend tubing at control after compression nut has been tightened because this can result in gas leakage at connection. Square off and remove burrs from end of tubing. Push tubing into compression nut clearance hole until tubing bottoms. Check for gas leaks with soap and water solution any time work is done on a gas system.
Gas Leak Test: 1. Ensure that gas supply is turned on at the appliance service valve. Paint pipe connections upstream of pilot burner with rich soap and water solution. Bubbles indicate gas leak. If leak is detected, tighten pipe connections. Set thermostat to call for heat to light main burner. With main burner in operation, paint pipe joints including adapters and gas control inlet and outlet with rich soap and water solution.
If another leak is detected, tighten adapter screws, joints, and pipe connections. Replace part if leak cannot be stopped. Push clip into place. Tip of bleed gas tube must not extend into pilot flame.
Connect the other end of the ignition cable to the igniter terminal on ignition module. Use ceramic or plastic standoff insulators as necessary to prevent cable from contacting metal surfaces.
Perform Gas Leak Test anytime work is done to the system. If pilot flame goes out during ignition, but is pro-perly adjusted, recheck mounting and location instructions in Location section.
Refer to ignition module instructions to check wiring between igniter-sensor and ignition module or between gas control and ignition module. If all mounting and location instructions are followed but pilot continues to go out, construct shielding to protect pilot flame from main burner ignition and extinction and drafts.
Check pilot and main burner lightoff. To adjust pilot flame: 1. Turn off system by setting thermostat below temperature to call for heat. Disconnect lead to MV terminal on gas control. Light pilot by setting thermostat to call for heat. Remove pilot adjustment cover screw from gas control. Turn inner pilot adjustment screw clockwise to decrease or counterclockwise to increase pilot flame.
Always replace pilot adjustment cover screw and tighten firmly after completing adjustment to assure pro-per operation. Replace damaged wire with moisture-resistant no. After adjustment, always replace pilot adjustment cover screw and tighten firmly to assure proper gas control operation. If ground is poor or erratic, safety shutdown will oc-cur.
Therefore, if nuisance shutdowns are reported, check the ground precautions in Wire Igniter-Sensor section. If leadwire is damaged or deteriorated, use no. Excessive temperature at the ceramic flame rod insulator will permit electrical leakage to ground. If bracket is bent, bend it back to correct position.
Assure that ignition cable is not in contact with metal surfaces. Assure that ignition cable is not more than 3 feet [1 m] long.
Assure connections to the ignition module stud terminal and the igniter-sensor are clean and tight. Check electrical continuity of ignition cable. This device is designed for use only as an operating control. This switch can serve as a way to start and stop electrically operated equipment when a flow or no flow condition occurs in a variety of applications.
The Model IFS is a flow switch used in liquid flow lines carrying water or any fluid not harmful to brass, stainless steel, EPDM or fluorosilicone, and not classified as a hazardous fluid. Not for use in hazardous locations. A weldolet may also be used. Screw the device into the tee fitting as shown in Fig. The flat of the paddle must be at a right angle to the flow. The arrow on the side of the bushing must point in the direction of flow, see Fig. Use a reducing tee for larger sizes of pipe to keep flow switch close to pipe and provide adequate paddle length in the flow stream.
IFS models with flexible paddles are furnished with 4 paddles. Rigid paddle models are furnished with 2 paddles. Intermediate sizes may be trimmed from the appropriate paddle using the paddle template in Fig.
The paddle must not touch the inside of the pipe or bind in any way. Paddles smaller than the actual pipe size should be used for added support and higher sensitivity, see Fig. The paddles must be properly attached and the screw that holds the paddle must be securely tightened. Mount the device in a section of pipe where there is a straight run of at least 5 pipe diameters on each side of the flow switch.
Do not locate adjacent to valves, elbows or orifices. The switch should be mounted so the terminals or wire leads are easily accessible for wiring. It is not recommended for installations where flow is downward. When mounted in a horizontal pipe line the switch will trip at a lower flow rate than shown in Fig. Sensitivity Adjustment Note: Turn screw clockwise to increase the flow rate required to activate the switch.
Turn screw counter-clockwise to decrease the flow rate required to activate the switch. NOTE: When installing rigid paddles, do not stack paddles. Only install ONE paddle that best fits the pipe. Care must be taken to properly orient the device for the direction of the flow. Do not tighten by grasping the switch enclosure. Use the wrenching flats on the bushing only. Use the drawing at right as a template and trim at the dotted arc when trimming the appropriate paddle for intermediate pipe sizes.
Make appropriate adjustments to the sensitivity adjustment screw to be sure the switch restores fully at the desired flow rate. Turn the sensitivity adjusting screw counter-clockwise to decrease the flow rate required to actuate the switch. Be sure to replace the cover upon completion of the installation and adjustment. Louis, MO. NOTES: 1. Make all electrical connections in accordance with the National Electrical Code and local regulations. Installation and servicing of gas appliances and controls must only be performed by qualified personnel.
After installation or servicing; test manual valve, operating valves, pressure regulation, and automatic safety shutt off valve for proper opertation.
DO NOT use this control if it has been exposed to water corrosion through immersion, dripping, etc. It may be damage and must be replaced. Shut off gas and electricity before starting installation or service. Turn back on to test or operate. DO NOT connect appliance before pressure testing gas piping. Damage to gas valve may result. DO NOT insert any object other than suitable pipe or tubing in the inlet or outlet of the gas valve.
Internal damage may occur and result in a hazardous condition. DO NOT grip gas valve body with a pipe wrench or vise. Damage may result causing gas leakage.
Use inlet or outlet bosses or a special body wrench. DO NOT short the gas valve terminals. The thermostat or the fuse will be damaged. DO NOT allow any flame to impinge on the regulator vent tubing if supplied. It may clog and cause gas valve malfunction. DO NOT use the gas cock to adjust gas flow. In case of failure of main burner to shut off; turn off gas supply. Allow fan, if so equipped, to run until heating unit has cooled off.
Keep all combustible materials away from gas appliances. DO NOT allow lint or dust to collect in burner area. Dials must only be operated by hand. Never use pliers, wrench or other tools to turn dials. Leas test with soap solution after installation or service with the main burner on. Coat pipe and tubing joints, gaskets, etc. Bubbles indicate leaks. Adjust the pilot key to provide proper flame.
Re-assemble the gasket and cap. Leak test per warning note These valves are for use in a 24VAC system for either direct ignition or pilot ignition systems. Electrical Ratings: Switch ratings are shown on the inside cover of each device. The electrical requirements on controlled equipment must not exceed this rating.
LA—breaks the burner circuit on a rise in water temperature. It is normally used as a limit controller. When used as an operating controller or low limit, a separate high limit control must be used.
LB—makes a control circuit on a rise in water temperature. It is normally used as a circulator controller to prevent circulator operation until boiler water temperature is at or above the control setting. LE—breaks the burner circuit and locks out on a rise in water temperature. It is used as a high limit controller where manual reset is desirable. LA—makes the burner circuit on a drop in water temperature. It is normally used as a circulator and low limit cooling controller.
These remote bulb see Fig. Locate this tapping in a representative point where typical water temperature can be measured. Never locate the bulb or protecting immersion well close to a hot or cold water inlet or steam coil. Install the bulb in the supply line of an indirect water heater, in the indirect water heater itself, or in the feed riser about 6 in.
If the riser is valved, install the bulb between the boiler and the valve. Depending on model and installation requirements, install the temperature sensing bulb either in an immersion well see Fig. For installations not using a well, secure the bulb with a bulb compression fitting see Fig.
Order the well or the fitting separately. Failure to follow them could damage the product or cause a hazardous condition. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.
After installation is complete, check out product operation as provided in these instructions. If immersion well or capillary compression fitting must be ordered, refer to form , Wells and Fittings for Temperature Controllers, for part numbers and ordering information. Fit well, if used, to sensing bulb snugly for good thermal response. Insert bulb until it rests against the bottom of the well; then hold it there while tightening the tubing clamp.
Loosen the draw nut and spread the jaws of the clamp with the screwdriver if necessary. Adjust tubing to fit through retainer clamp groove, as shown at point B. Be careful not to kink or bend tubing sharply. Be sure bends have at least 1 in. If the system is filled, drain the system to a point below the boiler tapping, or to wherever the sensing bulb is to be installed. All wiring must agree with applicable codes and ordinances and regulations in such matters as wire size, type of insulation, and enclosure.
The controllers are provided with conduit knockouts in the top and bottom of case. Screw fitting into the boiler or pipe tapping. Place packing nut on tubing. Slide bulb completely through fitting. Place composition disc and 4 slotted brass washers on tubing in the order shown in Fig. Turn brass washers so that slots are degrees to each other. Screw the fitting into the boiler or pipe tapping. Slide sealing washer onto the bulb. Insert the bulb into the fitting until bulb bottoms.
Slide split sleeve into fitting. Place clamps A and B on assembly so that sleeve is drawn into fitting when screws are tightened. Adjust the control point to correspond with the boiler manufacturer recommendations. To adjust, insert a screwdriver in the slotted screw type head located beneath the window in the cover.
Turn the scale to the desired control point. Set the differential to correspond with the boiler manufacturer recommendations. To adjust models with adjustable differential, rotate the wheel on the back of the snap switch, see Fig. Manual Reset LE : After boiler water temperature has dropped to a point below the high limit setting, less differential, the reset button at the front of the case must be pushed before the burner can operate.
Differential on adjustable differential models : Remove cover and move the differential adjustment wheel Fig. Replace cover. Control Point: Insert a screwdriver in the slotted head visible through the cover, and turn the indicating dial to the control point. Put the system into operation and observe the action of the control through several cycles to make sure that it provides proper control of the system as described in the Operation section.
Make any additional adjustments necessary to assure comfort requirements. This product is intended for use only in systems with a pressure relief valve. The LG Controller has an adjustable interstage differential.
The setpoint adjustment knob determines the temperature at which the right switch operates. The Interstage differential is adjusted by turning the star wheel with a narrow screwdriver inserted into the rectangular hole in the chassis. These gas controls are used in appliances up to kW or kBTUH on natural gas and approved on EN, which consists of one automatic safety shutoff valve, Class B or C, one servo-operated shutoff valve, Class D, pressure governor, Class C, manually-operated valve, with or without pilot outlet.
These gas controls are available in a range of valve capacities, see Table 1. Table 2 provides gas capacity conversion factors. The suffix letter indicates temperature range and regulator type, see Table 3. They include safety shutoff, a manual valve, two automatic operators, a pressure regulator and a pilot adjustment.
Natural gas: 7. Natural gas: LP gas: 20 to 30 mBar 8 to 12 in. Suited for gas families Outlet Press Range Except unregulated models Manually operated valve operations Ambient temperature range Maximum inlet pressure. Equipment Damage Hazard.
Improper use can damage equipment. Read the instructions before use. This control must be installed in accordance with the rules in force. European-style inlet and outlet pressure taps are available. Standard opening A : less than 2 seconds. Slow opening H : less than 6 seconds. Special fast opening U : less than 1 second. Main valve connections If NPT, the valves must be serviced by the appliance manufacturer.
Valve Classification. Fire or Explosion Hazard. Can cause property damage, severe injury, or death. Plan the installation as outlined below. Plan for frequent maintenance as described in the Maintenance section. Australian Gas Association Design Certificate: Approved for Delta C applications. See Table 6. Current Draw: 0. Dripping water can cause the control to fail. Never install an appliance where water can drip on the control. In addition, high ambient humidity can cause the control to corrode and fail.
If the appliance is in a humid atmosphere, make sure air circulation around the control is adequate to prevent condensation. Also, regularly check out the system.
If a control gets wet, replace it. If the appliance is likely to be cleaned with water or steam, protect cover the control and wiring from water or steam flow. No down draft stack conditions are permitted. Derates or burner modifications required for other heating values or higher elevations. Actual efficiency can vary depending upon operating conditions.
For weight-critical applications, consult factory. Dimensions are in inches and are subject to production tolerances. Flanged connections extend approximately 3 in. For indoor, atmospheric vents 18 in. For outdoor, use rain cap. Ajax has been a market leader in premix combustion since , and is committed to meeting all clean-air requirements for today and into the future. Full access to combustion chamber and water sections Floating head design eliminates thermal shock Tubes are easily replaced using common straight boiler tubing Completely factory assembled and wired All models are E.
Models shown are for natural gas only. Burners, blower, new front door, barometric damper s , gas train and operating controls only. Installation will require welding mounting supports and brackets plus job piping, new front door, wiring and barometric damper s connections to be furnished by installer per job requirements.
These simple, yet effective, designs have proven to be reliable over many years of service. Flange connections extend approximately 3 in. The Ajax Series premix system achieves NOx levels below 12ppm by using knit metal fiber combustion surface, internal baffle plate, a gas injector and low temperature gas-air mixing section incorporated into a low pressure drop manifold design. By providing thorough mixing and cool flame temperatures, low emissions levels are achieved. The Ajax Series premix system is able to offer true ultra low NOx performance across the full range of firing via use of a fuel-air ratio valve, giving precise control for all firing rates.
Since the combustion is precisely controlled, heat transfer efficiencies increase as firing rate decreases, reducing the cost of operation. Constructed and stamped in accordance with the ASME Boiler and Pressure Vessel Code Section IV heating boilers , the tube bundle is supported by a rugged steel frame with expansion joints at each corner. This simple yet effective design allows the entire tube bundle to float freely as it expands and contracts preventing thermal shock damage. No air bubbles means no pitting and no corrosion.
Model WRF The AJAX Series boilers perform dependably and quietly, providing commercial, institutional, and industrial building with space heating and process hot water. SA grade-A steel tubes. Full face headplate gaskets Front headplate hand holes on models to Boiler legs with bolt-down lugs I-beam skids on all models. Copper tubes are not recommended for use with oil-fired burners.
For precise gas pressure requirement contact factory. Natural gas fuel pressure required to the main gas cock. Other fuels or burners will have different pressure requirements. The burner combustion air fan is used to induce the proper flow of flue gas into the combustion air within the burner housing. The result is a cooler flame temperature and a reduction of NOx. Model DRN The AJAX Series boilers perform dependably and quietly, providing commercial, institutional, and industrial building with space heating and process hot water.
The cast iron burner head has long been recognized as the simplest, most trouble-free gas burner available. Each burner assembly is comprised of multiple burner heads. Each burner head has its own orifice and requires no adjustments. The Ajax Series premix system achieves NOx levels below 20 ppm by using ceramic combustion surface, internal baffle plate, a gas injector and low temperature gas-air mixing section incorporated into a low pressure drop manifold design.
The Ajax Series premix system achieves NOx levels below 12 ppm by using knit metal fiber combustion surface, internal baffle plate, a gas injector and low temperature gas-air mixing section incorporated into a low pressure drop manifold design. Model DRF The AJAX Series boilers perform dependably and quietly, providing commercial, institutional, and industrial building with space heating and process hot water.
The Ajax Boiler Factory limited warranty provides assurance that all products are free from manufactures defects at the time of shipment and meet specifications and performance described in the product literature. It is important to understand the difference between a factory warranty and an installed warranty.
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