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Installation & Operating Manual
The Harman Magnum Stoker
Tested by:
DO NOT BURN WET COAL.
R15
OMNI-TEST Laboratory
SAFETY NOTICE
PLEASE READ THIS ENTIRE MANUAL BEFORE YOU INSTALL AND USE YOUR NEW ROOM HEATER. FAILURE TO
FOLLOW INSTRUCTIONS MAY RESULT IN PROPERTY DAMAGE, BODILY INJURY, OR EVEN DEATH.
FOR USE IN THE U.S. AND CANADA.
IF THIS HARMAN STOVE IS NOT PROPERLY INSTALLED, A HOUSEFIRE MAY RESULT. FOR YOUR SAFETY, FOLLOW
INSTALLATION DIRECTIONS.
CONTACT LOCAL BUILDING OR FIRE OFFICIALS ABO
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2 INDEX Introduction 3 Warnings 3 Packing List 5 Assembly 6 Installation 9 Verti-Flow Stoker Control 10 Operation 14 Maintenance 15 Trouble-Shooting 17 Wiring Diagram 19 Feeder Parts 20 Domestic Hot Water Coil 21 Hot Air Option 22 Warranty 23 DO NOT BURN WET COAL
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3 INTRODUCTION This all new design by Harman features the Verti-Flow Stoker System. THERMOSTAT This unique system provides a very wide range of heat output. The Verti-Flow Stoker can operate from 5000 to over 85,000 btu's automatically. This unit has a 100 pound coal capacity and can provide 85,000 btu's for 17 hours or stretch out to over 100 hours when less heat is required. A thermostat is used to regulate the heat output of the stove. When no 100 LBS. COAL heat is needed, the stoker sto
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4 READ THIS Always empty hopper when not burning for more than a week. When left standing for long periods with wet coal, the pusher block will rust and corrode, causing it to seize. If the stoker is then turned "on", damage to the pusher assembly and feed motor will result. This will be considered neglect and will void the warranty on those parts. Always check to see if moving parts are free before using if the
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5 PACKING LIST Parts inside feeder box Pusher block adjuster rod Restricter Plate wing nut thermostat adjuster tube control box adjuster Inside bag (2) terminals for thermostat wire (4) 8-32 x 1/2 screws and nuts motor cover Parts inside stove (2) grate inserts main feeder body firebricks Parts inside hopper box grate holder hopper support hopper lid distribution blower combustion blower scraper hopper assembly ash pan DO NOT BURN WET COAL
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6 ASSEMBLY adjuster rod Pusher block slot First, a note to you, the customer. This section on Assembly is in the manual for your information should you ever need to move your unit and to help you under- stand how each part is installed. It is not intended by Harman Stove Company that you assemble this unit. This job is to be performed by your Harman Dealer who has been taught how to assemble and explain the dust tray operation of your new stoker to you. feed indicator Your dealer will also
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7 Feeder Begin assembly by sliding the pusher block with the adjuster rod from the front through the slot shown in fig.1. Be sure the pusher block is turned with the bolt hole to Blowers feed indicator side. Next, hold pusher block in the most rearward posi- gasket tion and slide the adjuster tube over the adjuster rod until it bottoms out on the pusher block. Thread the adjuster over the adjuster rod. Thread wing nut on the end of the adjuster rod. Make sure the gasket is in place on the f
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8 Hopper Install hopper support on top rear of stoker. Note that bolt holes in hopper support are slotted for adjust- ment. Insert small end of hopper into the hopper slot on the feeder hopper support as shown. Push top of hopper under the hopper support, causing the slot on the bottom side of the support to hook onto the hopper. The hopper support will spring up slightly for the hopper to go under. If you have difficulty getting the hopper under, adjustment may be necessary. Use slotted hole
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9 Top View Front 18" 34" barometric 8" damper 16" 34" 8" minimum 4" IMPORTANT Use only U.L. approved floor board Clearance to Combustibles IMPORTANT INSTALLATION Take draft reading between the barometric damper and the stove. Do this on pilot mode. Place the stoker a minimum of 4" to a com- draft bustible wall from the rear of the hopper and a adjustment minimum of 34" from the sides. The stove should be placed on a noncombustible floor. Install a 6" stove pipe from flue opening to chimney wi
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Fine Tuning Draft 10 With fire burning and stablized take draft reading in flue pipe and note the reading. Next take a reading in the fire box by removing the bolt in the front center of the unit. While watching the draft meter, close the restricter plate on the combus- tion blower slowly, until the needle reads about the same as it did on the flue. An example would be a flue read- ing of .05 and a firebox reading of .02. Close the restricter plate until the firebox reading is .04 to.05. C
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11 of the stove. NOTE: The bolt holes on the blowers are not used. Install the control box on mounting pad provided on the side of the stoker with (4) #8-32 bolts. NOTE: The recep- tacles go toward the front. Plug the gear motor into the top, the small combustion blower into the middle, and the large distribution blower into the bottom receptacle on the control box as shown. More on the control later. The thermostat connections on the back panel of the Stoker Control are .25 inch male quick c
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12 operation. The timer will continue to control the stove until the room temperature drops below the thermostat set point temperature. At this time, the stove will operate constantly until the room temperature reaches the thermostat set point again and the cycle repeats. It should be noted that the timer adjustments do have a 0 minute position. The default conditions for these adjust- ments set for 0 minutes are as follows: "on time" 0," off time" 0 unit will run constantly; "on time" grea
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13 blower, coal feeder) receptacles will become active for the pro- grammed amount of time. When "on" timer has finished timing, the stoker control will recycle and the "distribution blower" timer along with the "off" timer will once again become active. The final operator interface is the switch on the front panel adjacent to the receptacles. This switch in the "on" position allows power to the coal feeder motor receptacle. In the "off" position, power will be removed only from the coal feed
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14 OPERATION "off" 12 minutes, extend timer 2 minutes. You may find that these settings produce too much heat in pilot mode. If so, you can reduce the "on" time and increase the "off" time. However, be aware that you can go too far and have the fire go out. It is best to adjust one minute at a time. To start a fire you first pour rice coal into the hopper. With the feed indicator thermostat turned up and the stoker running, the coal will begin to feed onto the grate inside the stove. This
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15 Cycle in and out will not burn completely. After the fire is burning and the feed rate is adjusted, you can now set the thermostat to the desired temperature. MAINTENANCE With each hopper of coal that is burned approximately one ashpan full of ashes must be removed. Failure to remove the ashes will result in a blocked up grate and the fire will not burn properly. Remember, the ashpan will be hot, so always wear protective gloves. Weekly: The small tray in the side of the stoker should be
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16 This operation can also be performed when the unit is not burning by lifting out the grate inserts and removing fly ash with the vacuum cleaner. Annually: At the end of the heating season is the best time to perform annual maintenance. The reason is rust and corrosion can form much faster in the high humidity of summer. Remove all coal from hopper. Remove all ashes. Remove and clean flue pipe. Check chimney and clean if necessary. IMPORTANT è Remove hopper and check for rust at bottom edg
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17 void the warranty on those parts. Always check to see if moving parts are free before using if the unit has not been burned for a period of time. This can best be determined by shaking the adjuster rod. TROUBLE-SHOOTING FEEDING PROBLEMS Wet Coal -- Wet coal does not flow the same as dry coal. There- fore, the feed rate will change with wet coal. If it is too wet, it may not feed at all. Wet coal can also cause a sulfur odor. Wrong Size Coal -- The Verti-Flow System is designed to burn rice
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18 The installation should be performed by your dealer who is factory trained to correct any problem on initial start-up. After proper installation, many years of trouble-free operation can be expected. Stoker Control Trouble-Shooting This trouble-shooting guide is designed to help the customer find basic problems external to the stoker timer. If a problem cannot be located by using this guide, servicing of the stoker control or replacement may be required. This should be done by qualified per
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19 Check the connections from the stoker control to the thermostat. Check the thermostat for proper operation. PROBLEM: The motors do not turn off even when the room tempera- ture is above the thermostat set point. Check that the programmed off time is not for 0 minutes. DO NOT BURN WET COAL
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20 Feeder Parts 8 7 1 C J 9 G 16 G D 15 G G 6 10 C J 3 H 13 J 7 D 14 F 12 2 11 E I 22 A B 18 21 4 D C B B 17 20 L A K K 19 5 K A A 1. (2)grate inserts 16. motor cover A (4) 1/4 x 5/8 2. grate holder 17. cam arm cover B (3) 1/4 " nut 3. grate angle 18. cam arm C (3) 3/8 x 1 1/4 4. feeder body 19. dust tray D (3) 3/8 flat washer 5. clean-out slide 20. feed indicator E (2) 3/8 nuts 6. pusher arm 21. cam bearing F (1) 1/4 x 1 1/4 Allen 7. (2) pillow block bearings 22. gasket G (4) 10-32 x
