Monogram 15900-012 User manual

Monogram Sanitation
800 W. Artesia Blvd., Compton, CA 90244-9057
TOILET ASSEMBLY
PN 15900-012
COMPONENT MAINTENANCE MANUAL
WITH
ILLUSTRATED PARTS LIST
DISTRIBUTION STATEMENT
This document contains proprietary information of Monogram Sanitation, and it is issued in strict confidence. Except for
rights expressly granted by contract, this document may not, in whole or in part, be duplicated, reproduced, disclosed, or
used for design or manufacturing purposes without written authorization from Monogram Sanitation.
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RECORD OF REVISIONS
REV
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COMPONENT MAINTENANCE MANUAL
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RECORD OF TEMPORARY REVISIONS
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REV NO. PAGE NUMBER ISSUE DATE BY DATE REMOVED BY

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COMPONENT MAINTENANCE MANUAL
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SERVICE BULLETIN LIST
SERVICE BULLETIN NO. REVISION NO. DATE INCORPORATED
INTO MANUAL

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COMPONENT MAINTENANCE MANUAL
PN 15900-012 Series
Jan 10/95
LIST OF EFFECTIVE PAGES
SUBJECT PAGE DATE
Title T-1 Jan 10/95
Record RR-1 Jan 10/95
of Revisions
Record of RTR-1 Jan 10/95
Temporary
Revisions
Service Bulletin SBL-1 Jan 10/95
List
List of Effective LEP-1 Jan 10/95
Pages LEP-2 Jan 10/95
Table of TC-1 Jan 10/95
Contents
Introduction INTRO-1 Jan 10/95
Description and 1 Jan 10/95
Operation 2 Jan 10/95
3 Jan 10/95
4 Jan 10/95
Testing and 101 Jan 10/95
Trouble Shooting 102 Jan 10/95
103 Jan 10/95
104 Jan 10/95
105 Jan 10/95
106 Blank
Disassembly 301 Jan 10/95
302 Jan 10/95
303 Jan 10/95
304 Jan 10/95
305 Jan 10/95
306 Jan 10/95
SUBJECT PAGE DATE
Cleaning 401 Jan 10/95
402 Jan 10/95
403 Jan 10/95
404 Jan 10/95
Check 501 Jan 10/95
502 Jan 10/95
503 Jan 10/95
504 Jan 10/95
Repair 601 Jan 10/95
602 Jan 10/95
603 Jan 10/95
604 Jan 10/95
Assembly 701 Jan 10/95
702 Jan 10/95
703 Jan 10/95
704 Jan 10/95
705 Jan 10/95
706 Jan 10/95
707 Jan 10/95
708 Jan 10/95
709 Jan 10/95
710 Jan 10/95
711 Jan 10/95
712 Jan 10/95
Fits and 801 Jan 10/95
Clearances 802 Blank
Special Tools, 901 Jan 10/95
Fixtures and 902 Jan 10/95
Equipment
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COMPONENT MAINTENANCE MANUAL
PN 15900-012 Series
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LIST OF EFFECTIVE PAGES
SUBJECT PAGE DATE
Illustrated Parts 1001 Jan 10/95
List 1002 Jan 10/95
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1004 Jan 10/95
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TABLE OF CONTENTS
SUBJECT PAGE
Introduction INTRO-1
Description and Operation 1
Testing and FaultIsolation 101
Automatic Test Requirements NA
Disassembly 301
Cleaning 401
Check 501
Repair 601
Assembly 701
Fits and Clearances 801
Special Tools, Fixtures, and Equipment 901
Illustrated Parts List 1001
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COMPONENT MAINTENANCE MANUAL
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INTRODUCTION
1. General
This publication contains shop maintenance instructions to maintain, troubleshoot and test the
toilet assembly. The toilet assembly is manufactured by Monogram Sanitation.
2. Product Support Services
Contact Monogram Sanitation for repair services, technical documents, replacement parts, and
other product support services.
Monogram Sanitation
800 W. Artesian Blvd.
Compton, CA 90224-9057, USA
Telephone: [phone]
Fax: [phone]
SITA: LAXMOXD
3. Layout of Manual
The information in this manual is divided into sections in accordance with Air Transportation
Association, Specification 100, to enable maintenance personnel to disassemble, clean, check,
repair, assemble, troubleshoot, and test the component. An illustrated parts list is provided to
locate, identify, and requisition parts.
4. Revision Service
To ensure that coverage contained in this handbook reflects changes in maintenance concepts and
procedures, revised information is provided to the customer through a letter of transmittal,
advising pages to be removed and replaced by a revision. This letter includes a “highlights” page
which identifies the general reason for change and indicates the effectivity of the change. Any
service bulletins which may be involved are also noted accordingly.
Page INTRO-1

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COMPONENT MAINTENANCE MANUAL
PN 15900-012 Series
38-31-07 Jan 10/95
5. Abbreviations
Abbreviations used throughout this manual are defined as follows:
ASSY Assembly
CMM Component Maintenance Manual
DPL Detail Parts List
EFF Effectivity
FIG. Figure
gpm gallons per minute
IPL Illustrated Parts List
lpm liters per minute
min minute
M.S. Monogram Sanitation
NA Not Applicable
NHA Next Higher Assembly
No. Number
PN Part Number
psig pounds per square inch, gage
REPLD BY Replaced by
REPLS Replaces
RF Reference
SB Service Bulletin
SUPSD BY Superseded By
SUPSDS Supersedes
V Vendor
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COMPONENT MAINTENANCE MANUAL
PN 15900-012 Series
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6. Special Terms and Handling Used in this Manual
A. Interchangeability between two different parts at one location is defined as follows:
(1) Superseded parts are not interchangeable with the superseding part(s). The notation
(SUPSD BY ITEM XXX) means that the part is not authorized for continued use. The
superseding part is identified with the notation (SUPSDS ITEM XXX).
(2) When a part is replaced by another part the notation (REPLD BY ITEM XXX) is used.
The replacing part is newer and is more desirable than the replaced part. However,
either part can be used. The replacing part is identified by the notation
(REPLS ITEM XXX).
B. All weights and measurements in the manual are in English units with metric equivalents in
parenthesis, unless otherwise stated.
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COMPONENT MAINTENANCE MANUAL
PN 15900-012 Series
38-31-07 Jan 10/95
DESCRIPTIONAND OPERATION
1. General
A. The flushing toilet assembly covered in this manual is a separable assembly of the toilet
installation and is capable of receiving, temporarily storing, and during ground servicing,
disposing of waste. Refer to Table 1, Leading Particulars for general specifications of the
toilet assembly.
2. Description
A. The toilet assembly (Figure 1) basically consists of the toilet bowl, (1), timer (2), tank and
top assembly (3), motor-pump-filter unit (4), drain valve assembly (5), solenoid valve
assembly (6), liquid level transmitter (7).
B. The toilet bowl assembly, made of polished stainless steel, is mounted on top of the tank and
top assembly. The timer assembly, a solid-state electronic device used to control sequence
and timing of flushing operation, is also located on the top of the tank. The tank and top
assembly, a Kevlar tank with molded-in structure reinforcement and top is the reservoir for
flushing fluid and waste. The motor-pump-filter assembly (MPFA) consist of a DC Motor
Assembly, static TEF coated perforated filter, pump impeller and rotating spray nozzle
housing. The MPFA is mounted on the tank with filter submerged in the flushing fluid. The
spring loaded, cable actuated drain valve assembly seals the toilet to prevent leakage of
stored fluid and waste and to permit draining and cleaning of the toilet during ground
servicing. The solenoid valve assembly controls the admission of cleansing and charging
fluid. The liquid level transmitter is a solid state electronic device capable of sensing two
discrete points of fill on the toilet tank and transmitting an electronic signal for pre-charge
level or full-tank level. The level sensors are located on an inside wall of the tank and the
transmitter is mounted on the top of the tank.
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COMPONENT MAINTENANCE MANUAL
PN 15900-012 Series
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Typical Toilet Assembly
Figure 1

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COMPONENT MAINTENANCE MANUAL
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3. Operation
A. The operation of the toilet begins with the initiation of the flush cycle. The electric motor of
the motor-pump-filter unit assembly is energized for approximately 10 seconds. Throughout
the flush cycle, flushing fluid is drawn thought the filter by the pump and discharged into the
toilet bowl in a swirling action to wash waste into the tank assembly.
B. Toilet Assemblies must be serviced after each scheduled flight by emptying, flushing, and
recharging the tanks with fluid containing a dye-deodorant-disinfectant-chemical-water
solution. Draining, cleaning and filling of the toilet assemblies is controlled from the aircraft
toilet ground servicing panel. During toilet tank draining and cleaning, the tank drain valve
is opened. The drain valve is a plunger type valve which is spring loaded to the closed
position. A pull force of approximately 35 pounds (15.91 Kg) is required to open the valve.
During tank cleaning and filling, fresh water is pumped into the toilet tank from an aircraft
lavatory servicing vehicle. The water enters the toilet tank through an inlet fitting of the
solenoid valve assembly, before going into the rotating spray nozzle via hose connection to
the pump inlet. The rotating spray nozzle is part of the motor-pump-filter assembly. The
pressurized fluid is jettisoned through spray nozzle openings and cleanses the inside of the
filter basket and tank side walls at same time pre-charge fluid is added. After the cleaning
operation the Liquid Level Transmitter will indicate when the fluid reaches the proper pre-
charge level.
4. Leading Particulars
Page 3/4
Leading Particulars
Table 1
Use Toilet Facilities
Electrical Power Rating +28 VDC, 5 AMPS Nom.
Fluid Pump Capacity (Nominal) 10.0+ 1 GPM (37.85+3.79 LPM)
Flushing Cycle (Nominal) 10+2 Seconds
Tank Capacity, Total 7.5 Gal (28.39 Liters)
Usable Capacity 3.8 Gal (14.38 Liters)
Priming Precharge 1.6 Gal (6.06 Liters)

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COMPONENT MAINTENANCE MANUAL
PN 15900-012 Series
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COMPONENT MAINTENANCE MANUAL
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TESTINGAND FAULT ISOLATION
1. Testing
A. Place complete toilet assembly over sink or drain opening. Arrange with toilet drain valve
opening above sink or drain.
B. Connect 28 VDC Power to the toilet. See the wiring diagram (Figure 101) for connection.
C. Connect a variable pressure water source to the water inlet fitting.
D. Rinse Test
(1) Introduce the water source at 60 psi(g) to the tank. Check and ensure that solenoid valve
is open.
(2) Observe pump spray nozzle for free rotation and adequate rinsing of the toilet tank.
(3) Remove the water source, disconnect the power source.
(4) Check and ensure that the solenoid valve is closed. Check for leaks around the inlet
fitting, antisiphon valve and pump exterior.
E. Motor Pump and Timer Test
(1) Connect the pump and timer to a regulated power supply which conforms to specified
voltage and current requirements.
(2) Depress push-button switch and note toilet function. Cycle duration shall be 10+2
seconds. The swirl pattern should be consistent and vigorous, washing the complete
inner surface of the bowl.
(3) Repeat flush cycle 3 to 4 times.
(4) Measure current surge and running current drain (5 amps nominal).
(5) Inspect for leaks around inlet tube and antisiphon valve.
(6) Drain toilet.
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F. Bowl Flushing Test
(1) Fill the toilet tank to the specified precharge level (see Leading Particulars).
(2) Upon flushing the toilet it should be observed that the bowl is completely wetted and
water action is vigorous without excessive splashing.
(3) Repeat flushing operation four times to confirm adequate bowl coverage and water
action.
(4) Drain toilet.
G. Liquid Level Sensor Test
(1) Connect the liquid level sensor to the appropriate test harness.
(2) Fill the toilet tank to the precharge level.
(3) Ensure that the precharge indicator light is on.
(4) Continue filling the toilet tank to the full level as indicated in the drawing.
(5) Ensure that the full indicator light is on, and the solenoid valve is shut off.
H. Leak Test
(1) Cap the tank vent. Fill the toilet throughout the bowl aperture until the water level is
approximately one inch below the bowl flushing ring.
(2) Remove any air trapped within the tank.
(3) Allow the toilet to remain in this condition for one hour after which there shall be no
evidence of leakage from any of the toilet components, including the toilet tank, tank
top, gaskets and fitting.
I. Disconnect water supply.
J. Disconnect power supply.
K. Drain all water from tank and remove all water from components.