Market Forge Industries M24E Installation and operating instructions

ME SERIES
ELECTRICALLY OPERATED BOILERS
INSTALLATION - OPERATION - MAINTENANCE
44 Lakeside Avenue, Burlington, Vermont 05401 USA
Telephone: [phone] Fax: [phone]
www.mi.com PN 14-0309 Rev C (12/15)
© 2015 - Market Forge Industries Inc.
MODELS
M24E
M36E

Your Service Agency’s Address:
Model
Serial number
Boiler installed by
Installation checked by

TABLE OF CONTENTS
INSTALLATION
Introduction.............................................................. 2
Assembly ............................................................... 3
Service Connections ..................................................... 4
OPERATION
Operating Instructions .................................................... 5
MAINTENANCE
Cleaning the Boiler ....................................................... 6
IMPORTANT
WARNING: Improper installa-
tion, adjustment, alternation,
service or maintenance can
cause property damage, in-
jury or death. Read the instal-
lation, operation and mainte-
nance instructions thoroughly
before installing or servicing
this equipment.
FOR YOUR SAFETY
Do not store or use gasoline or
other ammable vapors or liq-
uids in the vicinity of this or any
other appliance.
The information contained in this
manual is important for the prop-
er installation, use, and mainte-
nance of this boiler. Adherence
to these procedures and instruc-
tions will result in satisfactory
baking results and long, trou-
ble free service. Please read
this manual carefully and retain
it for future reference.
ERRORS: Descriptive, typo-
graphic or pictorial errors are
subject to correction. Speci-
cations are subject to change
without notice.

2
INSTALLATION
Introduction
To the Kitchen Manager:
1. Read this manual carefully and in its entirety. Contact
Market Forge Ind., Inc. for clarication if necessary.
2. Protect your kitchen personnel from scalding and
other serious injury by providing training programs to
acquaint all equipment operators with the correct and
safe methods of operation.
3. Operators must be made aware of the consequences
of misuse. Steam producing equipment, no matter
who the manufacturer, is inherently dangerous when
misused. The possibility of serious scalding always
exists, the careless and/or untrained operator will be
injured.
4. This equipment must be maintained according to the
guidelines in this manual (see “maintenance”). Lack
of maintenance will lead to a potentially hazardous
condition and possible liability. Operators should re-
port any equipment malfunction immediately and
steps must be taken to correct the problem before
further use of the equipment is allowed.
5. Keep this manual for daily reference.
THEORY OF OPERATION FOR ELECTRIC BOILER:
An explanation of how the control system operates on au-
tomatic electric boilers follows:
With the boiler lled with water to the proper level and the
heat switch is turned ON, the contactors will pull in and
permit the completion of the electric circuit to the heating
elements. When the boiler builds to its set pressure, the
pressure switch opens. This will open the circuit to the
coil in the contactor, which in turn will drop the contacts in
the contactor and shut off the electricity. As the pressure
in the boiler drops the pressure control switch will again
complete the circuit and build the boiler back to its set
pressure. To stop all steam generation place the ON/OFF
switch to the OFF position.

3INSTALLATION
Assembly
RECEIVING INSTRUCTIONS:
Inspect the equipment before signing the bill of lading.
The equipment supplied was tested and inspected before
shipment. The carrier accepted it as complete and without
damage.
This merchandise became your property when it was ac-
cepted by the carrier at the factory. Market Forge cannot
assume responsibility for loss or damage during transit.
For this reason, you should immediately inspect for visible
and concealed damage or shortages before signing for
shipment as follows:
1. Count the number of cartons and packages received
to be sure they coincide with the bill of lading.
2. Visually check all cartons for external damage.
3. Remove all cartons from their skids to examine equip-
ment for concealed damage. The carton is nailed and
strapped to the skid. It will be necessary to cut the
straps and pry off the container.
4. After inspection, replace the cartons over the equip-
ment on the skids to protect and secure the equip-
ment until it is ready for installation.
5. Sign for shipment if all is in order. Note shortages, ex-
ternal and concealed damage, if any, on the bill of lad-
ing before accepting a partial or damaged shipment.
6. If necessary, contact the carrier immediately to le a
claim. All claims must be led by the receiver.
7. Do not remove the cartons or the skids from the cook-
ing equipment until the unit has been transported
through the building to the actual set-up location. The
cartons should remain on the equipment as protec-
tion against dents and scratches.
INSTALLING LEGS:
Some models are shipped without legs. A separate carton
will contain the legs. If your model is received this way,
be sure to follow the installation instruction sheet packed
with the legs.
LEVELING:
In order for the boiler to drain correctly, it is important to
use a level on cabinet top both left and right and front-to-
back. If not level, adjust feet. On compartment cookers,
check the interior shelves for level condition.

4
INSTALLATION
Service Connections
ELECTRICAL REQUIRMENTS
Volts Phase 24kW 36kW 42kW 48kW
208 (197-219) 3 66 100 117 -
240 (220-240) 3 60 91 - 116
480 (360-500) 3 32 47 - 58
Details of other electrical systems available upon request.
SERVICE CONNECTIONS
EP Power Supply - Use wire suitable for at least 90°C. Nominal
amp per line wire:
CW1 Cold Water - 3/8” (10mm) NPT for cold water to boiler. Cold
water lines will have a maximum of 50 PSI (3.5kg/cw2) and a
minimum of 25 PSI (1.8 kg/cw2) water pressure (Water may
be filtered).
CW2 Cold Water - 3/8” (10mm) NPT for cold water to condenser.
Cold water lines will have a maximum of 50 PSI (3.5kg/cw2)
and a minimum of 25 PSI (1.8 kg/cw2) water pressure.
D Drain - Pipe full 2” (50mm) NPT to flush floor drain capable
of receiving water flowing at a maximum rate of 5 gallons (19
liters) per minute. DO NOT MAKE SOLID CONNECTION TO
FLOOR DRAIN.
ST Steam Take-off - Connection for operation of adjacent steam
powered equipment.
The only available space to supply utilities to the electric boiler is the 6”
(152mm) space between the floor and the cabinet.
PVC & CPVC PIPE ARE NOT ACCEPTABLE MATERIALS FOR
DRAINS.
DRAIN LINE INSTALLATION: The drain port of the unit is marked with
a colored tag and is located at the lower rear left side of the boiler as
viewed from the front. This exhaust line may be left open if the boiler
has to be situated in a tiled floor depression or a tiled curb section that
is equipped with drain facilities. If this is not the case, then a 2” (51mm)
NPT drain line must be connected to divert the exhaust to the floor drain.
If it is necessary to use more than two elbows, increase the size of the
waste line accordingly.
WARNING: DO NOT UNDER ANY CIRCUMSTANCE CONNECT THE
EXHAUST DRAIN LINE DIRECTLY TO A SEWER LINE.
WATER SUPPLY
Good quality water feed is the responsibility of the owner. Water quality
must be within the following general guidelines.
TDS: 40-125 ppm Hardness: 35-100 ppm Chlorine: <0.2 ppm
Silica: <13 ppm Chlorides: <25 ppm
Chloramine: <0.2 ppm pH: 7.0 - 8.5
The best defense against poor water quality is a water treatment system
designed to meet your water quality conditions.
Appliance to be installed with backflow protection according to federal,
state or local codes.
DIMENSIONS ARE IN INCHES [MM]
24 [610] M24E
36 [914] M36E
4 [102]
2.5 [64]
6 [152]
CW2
D
CW1
ST
EP
10.5
[267]
3 [76]
5 [127]
6 [152]
33
[838]
10.5
[267]
12.5
[318]
ST
22
[559]
28
[711]
6 [152]
CW1
CW2
DEP
Figure 1

5OPERATION
Operating Instructions
OPERATING INSTRUCTIONS FOR STEAM BOILERS
Be sure to check that
1. ON-OFF switch is in the off position.
2. Water supply valve is open.
3. Electricity is connected to all units.
4. Proceed with the daily operating procedures.
DAILY OPERATING PROCEDURE:
1. Press ON-OFF switch from off to on.
2. Wait 5-10 minutes for water to ll in steam boiler
(gauge glass should be 2/3 full)
3. Press HEAT switch from ON to OFF and release back
to ON. When the Low Water light goes off, the Green
indicator light will come ON. (This is necessary to
manually reset the unit).
4. Wait 10-15 minutes to allow the boiler to build pres-
sure to the desired operating level of 9-11 PSI PSI.
DAILY SHUT DOWN AND CLEANING:
1. STEP 1 - Press water switch off. This will drain the
steam boiler.
2. STEP 2 - After steam boiler has completely drained
repeat steps 1 & 2 (water to remain in steam boiler
until next daily use).
Figure 2

6
MAINTENANCE
Cleaning the Boiler
Market Forge recommends that the boiler be cleaned pe-
riodically due to impurities introduced through the water
supply. All water supplies contain some mineral deposits
and impurities; the degree varies with geographic loca-
tion. Market Forge is recommending a cleaning sched-
ule that will keep your equipment in proper, safe working
order where water supplies are relatively pure. Because
no water supply can be accurately compared with that of
another, this section should not be regarded as fool proof.
A stepped-up, more frequent cleaning schedule may be
required when excessive impurities exist.
The Cleaning schedule should be performed two or more
times per year as governed by the local water conditions.
Market Forge recommends the use of its “cathodic des-
caler” to protect the inner boiler walls and components
against rust, scale and lime deposits. The normal ef-
fectiveness of a descaler is one year. The schedule for
changing the “cathodic descaler” may be timed to the
cleaning schedule or accelerated as noted above.
Market Forge qualied service agencies are available
to establish a suitable schedule for TOTAL CONCEPT
cleaning and descaler replacement.
CLEANING INSTRUCTIONS
1. Move the heat and power switch to their OFF posi-
tions. This will allow the boiler to empty.
WARNING:
DISCONNECT THE MAIN POWER SUPPLY.
2. Remove the pressure switch manifold assembly at
the plumbing union (A) in “Figure 3” and move it safe-
ly out of the way.
3. Remove the front cover to the contactor box (B) in
“Figure 3” and move it out of the way.
A
B
Figure 3

7MAINTENANCE
Cleaning the Boiler
4. Remove the front cover with elements (C) “Figure 4”
as follows: Using a 1/4” socket head wrench, back off
the (9) Hex-Nuts, counterclockwise.
5. Clean rust, scale and lime deposits from the inside of
the boiler with a wire brush.
6. Remove all debris; ush out with clean water through
the opening created by removing the front cover with
elements and drain.
7. Remove the heating elements from the front cover
plate. Take care not to damage the heating ele-
ments - brush lightly.
8. Clean the front cover plate and element anges with
a wire brush and wash. Be sure the areas that will
come in contact with the gaskets and are clean and
smooth.
To protect against further scale and corrosion remove the
old cathodic anode. Install a new Market Forge zinc an-
ode.
REPLACEMENT PARTS NEEDED TO COMPLETE
THESE INSTRUCTIONS
Description Part No. Qty
Front Cover Gasket 98 - 1673 1
Set of Rubber & Brass Washers 90 - 0039 1
Heating Element Gasket 81 - 8660 3
Market Forge Zinc Anode 08 - 0034 1
Figure 4
C

8
MAINTENANCE
Cleaning the Boiler
APPLYING TOTAL CONCEPT DESCALER
Total Concept is designed to be used with water between
160°F to 200°F.
Preheating is required on the boiler to raise the water
temperature to the acceptable range. (160°F to 200°F).
Total Concept is a NSF listed nonfood product. This is
a liquid acid (nonmuriatic) product that works without
fumes, odors, and hazards associated with other harsh
chemicals. Product is also USDA approved.
BOILER TREATMENT CLEANING INSTRUCTIONS
After determining proper location for cleaner/descaler to
be added: Read complete instructions thoroughly; includ-
ing all warning and cautionary statements.
1. Energize boiler and ll to operating level.
Figure 5
2. Energize heating circuit to pre-heat unit.
Figure 6
3. AUTOMATIC - After unit is pre-heated, cycle the pow-
er switch to the OFF position then immediately back
to the ON position
Figure 7
Figure 8
4. Remove the shipping cap, replace it with the pouring
cap. Cut the tip of the pouring cap at the rst notch to
a 45°angle.
Figure 9
5. Install the tubing rmly over the tip of the pouring cap.
Figure 10
6. Energize compartment to release steam pressure in
boiler to “0” PSI before removing pipe plug.

9MAINTENANCE
7. Remove the plug from the access port on the steam
header pipe inside cabinet doors.
Figure 11
CAUTION:
HEADER PIPE & ACCESS PLUG ARE HOT.
8. Feed the tubing through the access port in the boiler
compartment.
NOTE: A minimum of 12” must be inserted.
Figure 12
9. Tilt the container, pour the contents into the unit.
Figure 13
10. When empty, rell the container with hot tap water
and add to boiler for cleaning. Repeat twice. This ad-
ditional 2 gallons of water will cause the low water
probe to be immersed in cleaner/descaler solution.
Replace access plug.
11. After rinsing the container, place tubing inside the
bottle, cover with shipping cap, dispose of properly.
DO NOT REUSE CONTAINER.
12. DO NOT ENERGIZE HEATERS. Allow 2 hours for
cleaning.
13. After time has elapsed, drain the boiler.
14. Rell the boiler and drain. Repeat this step twice.
15. Bring the boiler to temperature and cycle steam to the
cooker compartment to purge cleaner/descaler from
the steam supply lines. Repeat this step twice.
16. Boiler is now ready for use.
Cleaning the Boiler