Universal HydraMaster PEX 500 User manual

PEX 500-HM 23050
Owner’s Manual
MODEL: 56384886
Revision B
CAUTION - READ THE INSTRUCTIONS BEFORE USING THE MACHINE.
No part of this manual may be reproduced or used in any form or by any means (i.e. graphic, electronic, photocopying or electronic
retrieval systems) without the express written permission of HydraMaster. Specifications and information in this document are
subject to change without prior notice. All rights reserved. © 2021, 2023 HydraMaster
INFORMATION AND OPERATING INSTRUCTIONS
Universal Cleaning Concepts LLC
1500 Industry Street, Suite 300
Everett, WA USA 98203
www.hydramaster.com

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3 - RX-20 / CMX-20 Owner’s Manual3 - PEX 500 Owner’s Manual
Table of Contents
Introduction .................................................................................................................5
Parts and Service........................................................................................................5
Nameplate...................................................................................................................6
Uncrating the Machine ................................................................................................6
Cautions and Warnings...............................................................................................7
Grounding Instructions................................................................................................8
Symbols on the Unit....................................................................................................9
Know Your Machine ..................................................................................................10
Know Your Switch Plate ............................................................................................12
Preparing the Machine for Use .................................................................................13
Operating the Machine..............................................................................................14
After Using the Machine............................................................................................16
Maintenance Schedule..............................................................................................16
Power Cord Maintenance..........................................................................................16
Troubleshooting ........................................................................................................17
Technical Specications............................................................................................17
Water Flow Diagram .................................................................................................18
Electrical Diagram.....................................................................................................19
Wiringl Diagram Parts list .........................................................................................20
Assembly and Parts List............................................................................................21
2 Year Limited Warranty............................................................................................36
Warranty Registration ...............................................................................................37

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5 - RX-20 / CMX-20 Owner’s Manual5 - PEX 500 Owner’s Manual
INTRODUCTION
This manual will help you get the most from your PEX 500-HM 23050 carpet extractor. Read it thoroughly before operating the
machine.
The PEX 500-HM 23050 is intended for commercial use. It is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or
instruction concerning proper use of the by a person responsible for their safety.
GENERAL DESCRIPTION
The PEX 500-HM 23050 is an upright carpet extractor designed for easy transport and loading/unloading by one person. It
includes a built-in wand caddy, retractable hose wrap hooks and built-in cord wraps so you can easily transport the PEX 500-HM
23050 to job sites without an armful of accessories to carry.
Product Features
• Dual 3 stage Vacuums: Dual vacuums with unrestricted airow for superior water recovery.
• Heater Element: In-line, after the pump for longer life and instant heat up to 212 °F at the wand tip, lifetime warranty.
• Low Moisture System: Less water combined with higher heat means faster drying, less chance of shrinkage or wicking from the
pad.
• Tanks & Bodies: Lightweight, rotationally molded with lifetime warranty against cracks, leaks and dents. Unique pallet design for
easy maintenance.
• Low Noise: Day-time-quite operation with innovative sound deadening chamber.
• Top Warranty: Industry leading, 2 year parts and labor
PARTS AND SERVICE
The Original Equipment Manufacturer is
HydraMaster LLC
1500 Industry Street, Suite 300
Everett, WA USA. 98203
Repairs, when required, should be performed by an Authorized HydraMaster Service Center, who employs factory trained service
personnel, and maintains an inventory of HydraMaster original replacement parts and accessories. Call your HydraMaster Dealer
for repairs or service. Please specify the Model and Serial Number when discussing your machine.
MODIFICATIONS
Modications and additions to the cleaning machine which affect capacity and safe operation shall not be performed by the
customer or user without prior written approval from HydraMaster. Unapproved modications will void the machine warranty and
make the customer liable for any resulting accidents.

RX-20 / CMX-20 Owner’s Manual - 6PEX 500 Owner’s Manual - 6
NAMEPLATE
The Model Number and Serial Number of your machine are shown on the Nameplate, located on the rear base of the machine.
This information is needed when ordering repair parts for the machine. Use the space below to note the Model Number and
Serial Number of your machine for future reference. Be sure to register your warranty online at hydramaster.com/portables-
warranty-registration/
MODEL ________________________________________________
SERIAL NUMBER ________________________________________
UNCRATING THE MACHINE
When the machine is delivered, carefully inspect the shipping carton and the machine for damage. If damage is evident, save
the shipping carton so that it can be inspected. Contact the HydraMaster Customer Care Department immediately to le a freight
damage claim at 800.426.1301.

7 - RX-20 / CMX-20 Owner’s Manual7 - PEX 500 Owner’s Manual
IMPORTANT SAFETY INSTRUCTIONS
This machine is suitable for both commercial and residential use, for example in hotels, schools, hospitals,
factories, shops and ofces other than normal residential housekeeping purposes.
When using any electrical appliance, basic precautions should always be followed, including the following:
WARNING!: Read all instructions before using this machine.
To reduce the risk of re, electric shock, or injury:
•This machine is not intended for use by persons (including children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge.
•Do not leave the machine unattended when it is plugged in. Unplug the unit from the outlet when; not in use,
before cleaning the machine, prior to servicing or performing any maintenance on the machine, and when
replacing parts.
•To avoid electric shock, do not expose to rain or snow. Store and use machine indoors only, store in a heated
location. Do not let the machine or wand freeze.
•Do not allow to be used as a toy. Close attention is necessary when used near children.
• High pressure cleaners shall not be used by children or untrained personnel.
•Use only as described in this manual. Use only the manufacturer’s recommended attachments.
•Never add water over 130º F/54º C to the solution tank.
•Always use a defoamer when foaming occurs to prevent vacuum motor damage.
•Do not let the pump run dry.
•Do not use with damaged cord or plug. If the machine is not working as it should, has been dropped, damaged,
left outdoors or dropped into water, return it to a service center.
•Turn off all controls before unplugging.
•Do not pull by the cord, use the cord as a handle, close a door on the cord, or pull the cord around sharp edges
or corners. Do not run the machine over the cord. Keep the cord away from heated surfaces. To unplug, grasp
the plug, not the cord.
•Do not handle the plug, the cord or the machine with wet hands.
•Extension cords must be 12/3 and no longer than 50 feet. Replace the cord or unplug immediately if the ground
prong becomes damaged.
•Connect to a properly grounded outlet only.
•Do not put any object into openings. Do not use with any opening blocked; keep free of dust, lint, hair, and
anything that may reduce air ow.
•Keep loose clothing, hair, ngers, and all parts of body away from openings and moving parts.
•Do not vacuum anything that is burning or smoking, such as cigarettes, matches, or hot ashes, or any health
endangering dusts. Do not use to vacuum ammable or combustible liquids such as gasoline or use in areas
where they may be present.
• Risk of explosion – Do not spray ammable liquids.
•Use extra care when cleaning on stairs.
• Wear gloves or use rags when removing quick disconnects to prevent burns.
•Liquid ejected at the spray nozzle could be dangerous as a result of its temperature, pressure, or chemical
content.
• High pressure jets can be dangerous if subject to misuse. The jet must not be directed at persons, live electrical
equipment or the machine itself.

RX-20 / CMX-20 Owner’s Manual - 8PEX 500 Owner’s Manual - 8
• Do not use the machine within range of persons unless they wear protective clothing.
• Do not direct the jet against yourself or others in order to clean clothes or foot-wear.
• High pressure hoses, ttings and couplings are important for the safety of the machine. Use only hoses, ttings
and couplings recommended by the manufacturer.
• To ensure machine safety, use only original spare parts from the manufacturer or approved by the manufacturer.
• Water that has own through backow preventers is considered to be non-potable.
• Do not use the machine if a supply cord or important parts of the machine are damaged, e.g. safety devices,
high pressure hoses, trigger gun.
GROUNDING INSTRUCTIONS
This appliance must be grounded. If it should electrically malfunction, grounding provides a path of least resistance for electric
current to reduce the risk of electric shock. This appliance is equipped with a cord having an equipment-grounding conductor and
grounding plug. The plug must be plugged into an appropriate outlet that is properly installed and grounded in accordance with all
local codes and ordinances.
DANGER!
Improper connection of the equipment-grounding conductor can result in a risk of electric shock. Check with
a qualied electrician or service person if you are in doubt as to whether the outlet is properly grounded. Do
not modify the plug provided with the appliance. If it will not t the outlet, have a proper outlet installed by a
qualied electrician.
Replace the plug if the grounding pin is damaged or broken.
The Green (or Green/Yellow) wire in the cord is the grounding wire. When replacing a plug, this wire must be attached to the
grounding pin only.
Extension cords connected to this machine should be 12 gauge, three-wire cords with three-prong plugs and outlets. DO NOT use
extension cords more than 50 feet (15 m) long.
WARNING!
• If an extension cord is used, the plug and socket must be of watertight construction.
• Inadequate extension cords can be dangerous.

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RX-20 / CMX-20 Owner’s Manual - 10PEX 500 Owner’s Manual - 10
KNOW YOUR MACHINE
1 Solution Hose Quick Disconnect
2 Solution Tank Fill Opening
3 Vacuum Hose Barb
4 Drain Hose
5 Handles
6 Roller Balls
7 Wheel
8 Castor
9 Solution Filter
10 Recovery Tank Shutoff Float

11 - RX-20 / CMX-20 Owner’s Manual11 - PEX 500 Owner’s Manual
KNOW YOUR MACHINE (CONTINUED)
11 Recovery Tank Lid
12 Switch Plate
13 Wand Storage Clip
14 Pressure Adjustment Knob
15 Pressure Gauge
16 Pressure Relief Valve
17 Cord Retainer Straps (four)
18 Hour Meter (Optional)
19 Wand Retainer Bracket
20 Power Cords
21 Hose Hangers (two)

RX-20 / CMX-20 Owner’s Manual - 12PEX 500 Owner’s Manual - 12
KNOW YOUR SWITCH PLATE
A Solution Pump Switch - This switch turns the solution pump ON and OFF.
B Vacuum Switch - This switch turns the rst of the two vacuum motors ON and OFF.
C Vacuum Switch - This switch turns the second of the two vacuum motors ON and OFF.
D Heat Switch - This three position switch controls the water temperature. Position (I) is low temperature,
Position (O) is OFF and Position (II) is high temperature.
ABCD

13 - RX-20 / CMX-20 Owner’s Manual13 - PEX 500 Owner’s Manual
PREPARING THE MACHINE FOR USE
1Inspect the machine, hoses, and cleaning tools for cleanliness and completeness.
2 Screw the Recovery Tank Lid (11) closed. Ensure the drain cap is closed tightly.
3 Pre-spray spots and heavy trafc areas before extracting with the detergent of your choice. Mix the pre-spray according to
the detergent manufacturer’s directions.
4Fill the solution tank with clear water (12 gal. / 45.5 L capacity). If desired, add a detergent or rinse of your choice (we
recommend a CRI approved detergent). If you choose to add a detergent to the solution tank, be sure to mix well, and
always follow the use & dilution instructions on the detergent label. Only use a detergent with a pH between 5 and 10.
Although this machine is designed to supply instant hot water, the addition of warm water to the solution tank would
increase heater efciency. Never use water above 130º F/54º C in the solution tank.
5Ensure the dump hose is in the upright position.
6Monitor the water level in the recovery tank through out the usage and dump recovered water when necessary to prevent
over ow and potential subsequent damage to the motor.
CAUTION!
Use low-sudsing, liquid detergents designed for carpet extraction.

RX-20 / CMX-20 Owner’s Manual - 14PEX 500 Owner’s Manual - 14
OPERATING THE MACHINE
1 Follow the instructions in the Preparing the Machine for Use section of this manual.
2Turn off all the switches. Plug the power cords into properly grounded outlets.
3Attach the priming hose to the machine and place the open end into the solution tank.
4Turn ON the solution pump (A) and let it run until the pump is fully primed (approximately 30 seconds to 1 minute). Once
the pump is primed, turn off the pump and remove the priming hose.
5 Connect a solution line to the Solution Hose Quick Disconnect (1). Attach the other end of the solution line to the cleaning
tool.
NOTE: If there is pressure built up in the solution lines, it may be difcult to connect a solution line to the Quick Disconnect
(1). If this is the case place the Pump Switch (A) into the OFF (O) position. Momentarily turn the Pressure Relief Valve (16)
from the green “checkmark” position to the red “X” position and back again to the green “checkmark” position, this will relieve
the pressure to allow a solution line to be connected to the quick disconnect port.
CAUTION!
Always operate the machine with the Pressure Relief Valve in the Green “checkmark” position to avoid
possible damage.
6 Connect a vacuum hose to the Vacuum Hose Barb (3). Attach the other end of the vacuum hose to the cleaning tool.
7To use heated water for cleaning, press the Heat Switch (D) into either the Low Temperature position (I) or the High Temperature
position (II). Wait two minutes for the heat exchanger to reach temperature.
8 Press the Pump Switch (A) to ON (I).
9 Press the Vacuum Switches (B &C) to ON (I). The machine can be used with only one vacuum motor running for less suction
i.e. cleaning upholstery.
10 Spray through your tool a few times to ll the lines with solution. Begin cleaning.
11 To adjust the solution spray pressure; rotate the Pressure Adjustment Knob (14) clockwise to increase pressure and
counterclockwise to decrease pressure. The pump spraying pressure will be observable at the Pressure Gauge (15) while
spraying. Make sure the cleaning tool is spraying when adjusting the pressure, otherwise the pressure reading will be
inaccurate.
12 Watch the uid entering the Recovery Tank Lid (11). If there is a large amount of suds in the recovery tank, add a defoamer
chemical to the recovery tank.
CAUTION!
• Empty the recovery tank before the uid or foam enters the vacuum motor.
• If foam or liquid escapes from the machine, switch off immediately.
CAUTION!
Always make sure the oat is clean and travels freely before turning on the machine. A oat that is stuck will
cause the vacuum motor to suck in water, resulting in vac motor damage.
13 The recovery tank has a Recovery Tank Shutoff Float (10) to block the vacuum system when the recovery tank is full. You can
tell when the oat closes by the sudden change in the sound of the vacuum motor. When the oat closes, the recovery tank
must be emptied. The machine can continue to dispense solution, but will not pick up water with the oat closed.
14 Monitor the water level in the solution tank. Do not let the pump run dry. When the solution tank gets low, turn off the pump
and the vacuum motor(s), rell the solution tank with water and the proper ratio of cleaning detergent. Empty the recovery
tank and continue cleaning.
15 When the operator has completed the job; vacuum all unused solution from the solution tank into the recovery tank, turn off
the pump, vacuum motor(s) and heat exchanger. Unplug the machine.
16 Push the machine to a designated waste water “DISPOSAL SITE” and empty the recovery tank. To empty, loosen the Velcro
strap retaining the Recovery Tank Drain Hose (4) into its side storage location, then remove the plug (hold the end of the hose
above the water level in the tank to avoid sudden, uncontrolled ow of waste water).
17 Follow the instructions in the After Using the Machine section of this manual.

15 - RX-20 / CMX-20 Owner’s Manual15 - PEX 500 Owner’s Manual
OPERATING THE MACHINE

RX-20 / CMX-20 Owner’s Manual - 16PEX 500 Owner’s Manual - 16
AFTER USING THE MACHINE
1To empty the solution tank, open Solution Tank Fill Opening (2) and vacuum out all unused solution into the recovery tank
using the vacuum hose. Rinse the tank with clean water.
2Turn all the Power Switches (A, B, C & D) to OFF (O). Unplug the Power Cords (20). Coil the cords and secure them to the
rear of the machine using the four Cord Retainer Straps (17).
3To empty the recovery tank, loosen the Velcro strap retaining the Recovery Tank Drain Hose (4) into its side storage location.
Direct the hose to a designated waste water “DISPOSAL SITE” and remove the plug (hold the end of the hose above the water
level in the tank to avoid sudden, uncontrolled ow of waste water). Rinse the tank with clean water. Inspect the drain hose;
replace if kinked or damaged.
4 Disconnect the solution and vacuum hoses from the machine, at the Solution Hose Quick Disconnect (1) and Vacuum Hose
Barb (3) respectively. Flush the vacuum hose with warm water to wash any debris out of the vacuum hose and cleaning tool.
Inspect them for damage. Fold down the Hose Hangers (21) and the hoses can be wrapped around the machine for storage.
Set the wand on the Wand Retainer Bracket (19) and secure to the back of the machine at the Wand Storage Clip (13).
5Wipe the machine with a damp cloth. Do not use abrasive chemicals or solvents.
6Perform any required maintenance before storage.
MAINTENANCE SCHEDULE
MAINTENANCE ITEM Daily Weekly Yearly
Check / Clean Tanks & Hoses •
Check / Clean Recovery Tank Shut-Off Float •
Clean Extraction Wand/Tool •
Inspect & Clean Solution Filter •
*Check Carbon Brushes •
* Have a HydraMaster service technician check the vacuum motor carbon brushes once a year or after 300 operating hours. Check
the pump motor carbon brushes every 500 hours or once a year.
IMPORTANT!
Motor damage resulting from failure to service the carbon brushes is not covered under warranty. See the
Limited Warranty Statement.
7Store the machine indoors in a clean, dry place with the recovery tank lid open. Keep from freezing.
POWER CORD MAINTENANCE
Once a week (or more often if necessary), check the power cords for cracked or damaged insulation, exposed wires in the cord or
plug, and damaged or missing ground pin. Repair or replace damaged cord or plug immediately.

17 - RX-20 / CMX-20 Owner’s Manual17 - PEX 500 Owner’s Manual
TROUBLESHOOTING:
IF THIS
OCCURS CHECK THIS
NO SPRAY
Solution tank is empty, or lter is plugged.
Clogged spray tip(s).
Pump not running or not primed.
Valve on wand not operating.
Solution hose not completely connected to machine.
Contact your distributor for additional help.
LOW PUMP
PRESSURE
Check to see that the pressure relief valve is fully seated in the green checkmark “operating” position.
Contact your distributor for additional help.
PUMP DOES
NOT RUN
Pump switch is not turned on.
No power in the wall outlet - check to see if the breaker has tripped.
Contact your distributor for additional help.
LOW SUCTION
Debris is plugging cleaning tool or vacuum hose.
Drain hose cap is not completely closed.
Recovery tank lid is not seated, or gasket is damaged.
Contact your distributor for additional help.
NO SUCTION
Recovery tank is full and needs to be emptied.
Recovery tank ball oat is stuck closed. Clean so ball moves freely.
No power in the wall outlet - check to see if the breaker has tripped.
Contact your distributor for additional help.
LOW HEAT
Spraying too much water:
• Spraying too long. Try spraying for 12-15 seconds, or about three strokes.
• Spray tips(s) too large. Use a maximum of two HydraMaster part number 000-076-122 spray tip(s).
Longer hose or larger diameter hose than recommended. Use a maximum of 25-foot-long ¼ inch hose
for best results.
Heat exchanger needs to be ushed.
Contact your distributor for additional help.
NO HEAT
Heat is not turned on.
No power in the wall outlet - check to see if the breaker has tripped.
Call your distributor for additional help.
TECHNICAL SPECIFICATIONS (as installed and tested on the unit)
Model PEX 500-HM 23050
Model No. 56384886
Voltage/frequency 230 V / 50 Hz
Rated Current Circuit 1: 9 Amp
Circuit 2: 8.25 Amp
Protection Class (electrical) Class 1
Protection Grade IPX4
Sound Pressure Level
(IEC 60704-2-1)
68.7 dB LpA, 3 dB KpA
Total Weight w/o hoses and accesories 118 lbs. (53.5 kg)
Solution Tank Capacity 12 gal (45.5 L)
Recovery Tank Capacity 10 gal (37.8 L)

PEX 500 Owner’s Manual - 18PEX 500 Owner’s Manual - 18
PEX 500 - HM 23050 Water Flow Diagram
26 PEX 500-C-TICK - 56042658 7/2016
PARTS LIST
8
7
5
4
6
3
1
2
* = Optional, Not Included
WATER FLOW DIAGRAM
BLUE = FRESH WATER
GREEN = 500PSI WATER FLOW
PURPLE = PRESSURE RELIEF RETURN TO TANK
RED = 500PSI HEATED WATER FLOW
Item Description
1 Solution Tank
2 Fresh Water Inlet Filter
3 500PSI Pump
4 Unloader Valve
5 Pressure Gauge
6 Pressure Relief Valve
7 500PSI Quick Connect
8 Heater
BLUE = FRESH WATER
GREEN = 500 PSI WATER FLOW
PURPLE = PRESSURE RELIEF RETURN TO TANK
RED = 500 PSI HEATED WATER FLOW
ITEM DESCRIPTION
1Solution Tank
2Fresh Water Inlet Filter
3500PSI Pump
4Unloader Valve
5Pressure Gauge
6Pressure Relief Valve
7500PSI Quick Connect
8Heater
Water Flow Diagram

19 - PEX 500 Owner’s Manual
HydraMaster PEX 500 F
19 - PEX 500 Owner’s Manual
Electrical Diagrams
PEX 500 - HM 23050 Wiring Diagram
GND
GND
GND
MAIN POWER 2
L2
L1
TEMP 2TEMP 1
GRN/YEL
BLK/WHT
RED/WHT
WHT
VIO
BLK
HEATER
SW6SW5
HEAT ELEMENT
SI4
TEMP CUT-OFF
SI3
TEMP CUT-OFF
2
1
GND
2
5
1
3
4
S4
6
3
4
1
2
3
4
1
2
4
3
2
1
E5
YEL/WHT
WHT
BRN/WHT
WHT
RED/WHT
BLU
ORN
2
2
1
1
CHOKE COIL
CHOKE COIL
GRN/YEL
GRN/YEL
CHOKE COIL
CHOKE COIL
FILTER
WHT
BLK
BLK
GRN/YEL
PUMP 500 PSI
RED
BLK
BRIDGE
YEL/WHT
RED
RED
BLK
FILTER
FERRITE
L2
L1
S3
S2
S1
L6L5
VAC 2
VAC 1
L4
L3
E1
E2
HOUR METER (OPTIONAL)
M
M3
M2
M
2
1
/
~
CHOKE COIL
CHOKE COIL
E6
L2
L1
M1
- +
M
~
~
+
-
GND
~
/
MAIN POWER 1
LTR REVISION DESCRIPTION CODE DATE BY CHKD APPVD
A RELEASED DRAWING.
NA
05/12/2020 P.E. R.D.D. R.D.D.
D
C
B
A
A
B
C
D
1
2
3
4 5
6
7
8
8
7
6
5
4
3
2
1
E
F
E
F
DATE BY
R.D.D.
R.D.D.
P.E. DRAWN
CHECKED
APPVD
SHEET 1 OF 1
PROPRIETARY INFORMATION
11015 47th Avenue West,
Mukilteo, Washington 98275
D
SIZE
CODE:
REV
A
ELECTRICAL SCHEMATIC, PEX 500, 240V
000-179-075
PART NUMBER
5/12/2020
5/12/2020
5/12/2020

Assemblies and Parts Lists: 20 HydraMaster PEX 500 PEX 500 Owner’s Manual - 20
Wiring Diagram Parts List
Item Ref. No. Qty. Description
E1 56265103 1 Rectier, 35 Amp
E2 56113108 1 Kit-Hour Meter (Optional)
E5 56113120 1 Filter
E6 56113121 1 Filter
L1 NA 1 Choke Assy
L2 NA 1 Choke Assy
L3 56113122 1 Choke Assy
L4 56113122 1 Choke Assy
L5 56113122 1 Choke Assy
L6 56113122 1 Choke Assy
M1 56113102 1 Kit-Pump Motor 240V
M2 56113040 2 Vac Motor 230V-3 Stage
* 56113057 1 Vac Motor Brush Kit-240V
M3 56113040 2 Vac Motor 230V-3 Stage
* 56113057 1 Vac Motor Brush Kit-240V
S1 1644 1 Switch, Pump
S2 1644 1 Switch, Vac
S3 1644 1 Switch, Vac
S4 56113029 1 Switch, Heater
SW5 399 1 Thermostat
SW6 56113030 1 Thermostat
S13 NA 1 Thermal Cutout