Harman Magnum Stoker User manual





 






MGMR13






2
DO NOT BURN WET COAL

Introduction 3
Warnings 3
Packing List 5
Assembly 6
Installation 10
Verti-Flow Stoker Control 14
Operation 15
Maintenance 18
Trouble-Shooting 21
Wiring Diagram 23
Feeder Parts 24
Domestic Hot Water Coil 25
Hot Air Duct Option 26
Warranty 27

3
DO NOT BURN WET COAL


This proven design by Harman features the Verti-Flow Stoker
System.
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 continuous 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 heat is needed, the stoker stops and only runs to maintain
the re. If heat is needed, the thermostat can turn on the stoker
at any time.
The pilot or maintenance mode is controlled by a timer box. The
"on" and "off" time can be changed to provide more or less heat
during the maintenance cycle, and to adjust for different coal quality.
This unit must be connected to a chimney capable of providing
a .04 minimum draft reading.  If the chimney has
no draft, coal gases may escape from the unit and stovepipe.
 It is recommended that
a carbon monoxide detector be installed to warn of this condition.




This unit has been tested and approved by OMNI-TEST
Laboratories in accordance to the listed codes. This appliance
is also approved for installation into a shop.

4
DO NOT BURN WET COAL











Freshly delivered coal is watered down to
eliminate dust when loading and unloading. Wet
rice coal does not ow as well as damp or dry
coal. We do not recommend burning wet coal,
however, we realize if it's the only coal you have
it is better to burn it than freeze. If you must burn
wet coal, the feed rate must be increased in
order to get the same size re. As the wet coal
in the hopper dries out, the feed rate must be
decreased. If you don’t, the feeder will over-re
the stove and waste coal. Doing this once or
twice a year will not damage your stove as long
as it is hot and burning. The damage is caused
when the hopper has wet coal in it when the
stove is cold. This will cause rust and corrosion
which is not covered by your warranty.
Usually after the coal dries for three or four
days, depending on conditions, it will ow very
well and feed properly. The feed rate will then
be the same as for dry coal.
    


      



5
DO NOT BURN WET COAL


6
DO NOT BURN WET COAL

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 understand how each
part is installed.
Harman Home Heating recommends that your
dealer complete the assembly of this stove. It is
also recommended to take a draft reading with the
stoker burning. This reading should be recorded
on the warranty coupon when you activate your
warranty.

Begin assembly by sliding the pusher block with
the adjuster rod from the front through the slot
shown in g.1. Be sure the pusher block is turned
with the bolt hole to feed indicator side.
Next, hold the pusher block in the most rearward
position 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
onto the end of the adjuster rod.

7
DO NOT BURN WET COAL
Make sure the gasket is in place on the feeder
opening on the rear of the unit, as shown in g 3.
Insert the stoker into the opening in the rear of the
unit. Attach using (2) 5/16 X 1 1/4 bolts.

Install the smaller of the two blowers on the bottom
of the feeder by sliding it into the bracket as far as
it will go. Install restricter plate on blower as shown
below in Fig. 4.
Slide the larger blower into place on the bottom
rear 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 receptacles 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.

Install scraper as shown below with locking nut
on each side of the scraper. Tighten nuts when in
the rear most position to assure alignment. Cycle
rod in and out to clean unit.

8
DO NOT BURN WET COAL
IMPORTANT
Be sure the grate holder is centered
and back as far as possible.

Install hopper support on top rear of stoker.
Note that the bolt holes in the hopper support are slotted
for adjustment. Insert the funnel end of hopper into the
hopper slot on the feeder as shown. Push the top of the
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 difculty getting the hopper under,
adjustment may be necessary. Use slotted holes shown
at left. Now the feed motor cover can be installed.

The grate is composed of four pieces: the grate holder, (2)
grate inserts, and grate angle. The grate angle is bolted
to the grate holder with (2) 3/8 X 1 1/4 bolts. Before
installing the grate holder, the 3/8" round gasket must
be checked in the groove on the bottom side of the grate
holder, as shown in g. 7. Check to be sure the gasket
has not been damaged.
The grate holder must be installed through the top door
opening after the feeder has been installed.
Locate the ange at the rear of the grate holder into the
slot on the feeder as shown below. Bolt the front end down
with the 1/4 x 20 Allen bolt and nut provided. The rear end
will be locked in place by the ange. Before tightening the
bolt be sure the grate holder is back as far as possible
and centered side to side on the feeder opening.
Install grate inserts as shown at left. Divide the spaces
between the inserts equally and be sure they are not tight.
The spaces are needed for expansion.

9
DO NOT BURN WET COAL

Lay the glass frame face down on a at surface. The glass panel
should have channel gasket on the ends (short sides) only. Place
the glass panel into the frame, making sure that it is completely
down in the frame. Now lay the door onto the frame and secure
it using four 1/4-20 ange head bolts. With the assembled door
still lying face down, slide the door top trim under the top of the
door. Align the holes and secure the top trim using two 1/4-20 hex
head bolts.
Door Top Trim
Glass Frame
Glass Frame
Bolt Locations
Door Top Trim
Bolt Locations
Front View

10
DO NOT BURN WET COAL
IMPORTANT
Use only U.L. approved oor board
 


Place the stove a minimum of 3" from a combustible
wall from the rear of the hopper and a minimum of
24" from the sides. The stove should be placed
on a noncombustible oor, or a minimum 3/8" thick
noncombustible oor protector. Install a 6" stove
pipe from ue opening to chimney with a barometric
damper. Secure all pipe joints with sheet metal
screws. Plug power cord into a 120 volt receptacle.
Refer to the section on operation to light a re. With
the stove burning and stabilized, set barometric
damper at .04 to .06 on the draft meter. We do not
expect you to own a draft meter. Therefore, have
your dealer do set-up and ne tuning.
If your chimney will not produce .04 on the draft
meter, a draft inducer should be installed by your
dealer. The draft inducer may help to provide the
additional draft needed for proper operation. If not,
the chimney will need to be corrected.