Installation
& Operation Manual
Commercial Glasswasher
Model PKHT24
Model PKHT24 Shown
Form No. Z2346
Commercial Glasswasher Installation & Operation Manual
TABLE OF CONTENTS
Introduction ............................................................................................................................................3
Specifi cations ........................................................................................................................................4
PKHT24 Operational Cycle .................................................................................................................5
Getting Started .......................................................................................................................................6
Receiving and Installation....................................................................................................................6
Electrical ..............................................................................................................................................6
Plumbing..............................................................................................................................................6
BETA Detergent and Rinse Dispenser ................................................................................................7
Safety-Temp Feature ...........................................................................................................................8
Booster Heater Setup ..........................................................................................................................9
Installer Checklist ................................................................................................................................9
Operation ..............................................................................................................................................10
Dema Flow Disc ................................................................................................................................10
Rinse and Wash Temperatures .........................................................................................................10
Startup Procedures............................................................................................................................10
Operating and Cleaning Instructions ................................................................................................. 11
Preventative Maintenance Chart .......................................................................................................12
Quick Service Guide ..........................................................................................................................13
Troubleshooting .................................................................................................................................14
Parts Kits ..............................................................................................................................................16
Customer Notice .................................................................................................................................17
Electrical Diagrams .............................................................................................................................18
Printed in USA 2
Commercial Glasswasher Installation & Operation Manual
The PKHT24 is a hot water sanitizing, single rack, undercounter glasswasher. It is a stand-alone
machine featuring a self-contained booster heater. The only external connections necessary are power
supply, water supply, drainpipe, and optional chemical dispensers. The machine uses re-circulated
wash water and fresh water fi nal-rinse.
Operation of the PKHT24 is extremely user friendly. To initially fi ll the machine each day, push the
switch marked “FILL”. The machine is full when water begins to fl ow into the scrap tray. The booster
tank heater will maintain the wash water temperature at 155°F. The booster heater will produce a minimum of 180°F fi nal rinse water each cycle.
The supply water to the PKHT24 must be a minimum of 140°F at 24 psi (Pounds per Square Inch) with
a 6 gpm (Gallons Per Minute) fl ow rate and 60 gph (Gallons Per Hour) recovery rate. The pipe sup-
plying the water must be a minimum of a 1/2”. The plumbing connection is located at the back of the
machine. (See specifi cation sheet).The drain is a 1" barbed fi tting on the back of the machine for easy
attachment of your drain hose.
This manual provides a complete reference guide to the PKHT24. The fi rst section explains how the
machine is packaged and what to look for when receiving the machine.This manual explains how to
install and set up the machine for use. Requirements are given for plumbing, wiring, and space considerations. These are always taken into consideration by our well-trained sales representatives prior to
the order being placed. In the manual, guidance is also given for installation to ensure that the machine
will be able to run at optimum conditions.
The machine’s functions are mostly automatic and take little training to put into full operation. The
Operation section of the manual may be used for instruction and procedures when required. We make
this portion of the manual easy to understand so that all levels of operators are able to understand the
machine’s operation. The Operation section also includes diagnostic considerations for the machine
when problems occur.
We are committed to providing the best products and customer service, and we welcome your
feedback.
Printed in USA 3
Commercial Glasswasher Installation & Operation Manual
SPECIFICATIONS
METRIC EQUIVALENT
Printed in USA 4
Commercial Glasswasher Installation & Operation Manual
OPERATIONAL CYCLE
The PKHT24 operational cycle has a total cycle time of 2 minutes (120 seconds). The Timing Diagram
and the steps listed below detail the individual functions that are executed during each operational
cycle.
1. With the machine powered up, toggling the START switch begins a cycle.
a) Toggling the START switch energizes both the Cam Timer motor and the Instant Start Relay. The
Instant Start Relay latches ON the power to the Cam Timer motor so that the START switch can be
released a moment after it has been toggled without the Cam Timer motor losing power.
b) After about 1.5 seconds the Cam Timer’s fi rst cam — the Cam Timer Motor Cam — latches ON
the power to the Cam Timer motor and drops out the Instant Start Relay. The Cam Timer motor
continues to run for a total of 2 minutes, at which time it switches OFF — resetting the Cam Timer —
and waits for the next START command.
2. The Cam Timer’s third cam controls the Wash Pump. The Wash Pump comes ON about 3 seconds
into the Operational Cycle and continues to run for 94 seconds. This 94-second period is the Wash
Cycle.
3. At the same time that the Wash Pump comes ON the Cam Timer’s fourth cam powers ON the
Optional Drain Pump — if one is present — and keeps it running for about 7 seconds before powering
OFF. This cam turns ON again midway through the Rinse Cycle and stays ON for 10 seconds, turning
OFF 2 seconds after the Rinse Cycle has completed.
4. About 3 seconds after the Wash Cycle has completed the Cam Timer’s second cam, which
controls the Rinse Cycle, turns ON — energizing the Water Solenoid — and stays ON for 16 seconds.
This 16-second period is the Rinse Cycle.
5. When the Cam Timer assembly approaches the fi nal rinse portion of the cycle, the “Safe-T-Temp”
sixth micro switch will pause Cam Timer assembly if the booster heater has not reached 180 degrees.
The machine will remain in wash cycle mode until 180-degree rinse temperature is reached, and at
this time the Cam Timer will advance automatically into the rinse cycle and dispense 180 degrees rinse
water over the dishes.
Printed in USA 5
Commercial Glasswasher Installation & Operation Manual
GETTING STARTED
Receiving and Installation
The glasswasher is shipped from the factory in a corrugated box on a wooden pallet. The installation
guidelines give a systematic procedure for setting up the machine.
Start by removing the packaging material. Unwrap the machine and check for the following component
parts:
The Wash Tank Scrap Screen is shipped inside the wash cavity of the machine. This screen must be in
place during operation. It has been designed to perform two basic functions:
1. Strain water that is circulating through the spray arms and pump assembly.
2. A basket to catch broken glass, or heavy solids that may plug the impeller.
Set the machine in place, and level from side-to-side and front-to-back.
Electrical
1
Single-phase 230 volt, 60 Hz dedicated circuit should be used to supply electrical energy to the
PKHT24 Glasswasher (see specifi cation sheet on page 4). This system requires three power wires,
which include a current carrying neutral. An additional fourth wire must be provided for ground. Approximately 4-feet of ¾” fl exible conduit with power leads (L-1, L-2, Neutral and Ground) extending out of the
conduit are provided for easily connecting the power at installation. The power connection must be
located such that there is suffi cient length of the fl exible conduit remaining to permit the machine to be
moved for cleaning.
Plumbing
2
The machine is equipped with a 1/2” NPT connection located at the lower left-hand corner (facing the
back) of the machine. A 140°F water line should be plumbed to this point (see specifi cation sheet). The
water line used must be of suffi cient length and fl exibility to permit the machine to be moved for
cleaning.
1,2
All electrical and plumbing connections must be made by a qualifi ed person who will comply with all available federal, state,
and local health, electrical, plumbing and safety codes.
Printed in USA 6
Commercial Glasswasher Installation & Operation Manual
WARNING: If water pressure exceeds 50 psi, pressure reducing valve (PRV) is recommended. The
supply water to the PKHT24 must be a minimum of 140°F at 24 psi (Pounds per Square Inch) with a 6
gpm (Gallons Per Minute) fl ow rate and 60 gph (Gallons Per Hour) recovery rate. The pipe supplying
the water must be ½” minimum. The plumbing connection is located at the back of the machine. (See
specifi cation sheet on page 4).
The PKHT24 may be supplied with an optional drain pump for elevated drains. For fl oor gravity drain
applications, the drain pump should not be used and a good commercial grade hose needs to be
connected to the discharge side of the diverter valve (drain valve) and run to the fl oor drain. If a drain
pump is used with a fl oor drain, the drain hose must rise 12 to 16” before dropping to the fl oor drain (to
reduce any chance of the pump cavitations).
WARNING: Water hardness greater than 3 grains per gallon requires a water softener to prevent
damage to heating elements (scale build- up) and booster tank rinse fl ow restriction. Rinse fl ow
restriction will cause the booster tank to expand and contract causing metal fl ex, which will eventually
crack the tank.
BETA Detergent And Rinse Dispenser
The built-in Beta Detergent and Rinse Dispenser has easy access for chemical settings behind the
front kick panel. Both initial charge and recharge is factory pre-set. Basic settings for both detergent
and rinse speed are 50%. Operating fi ne-adjustment screws on the dispenser can control the amount
of chemicals drawn into chemical lines.
Printed in USA 7
Commercial Glasswasher Installation & Operation Manual
Safety-Temp Feature
The Safety-Temp feature assures the fi nal rinse cycle is always at a consistent minimum of 180
degrees.
How it works: The Safety-Temp function operates off the fi fth cam (labeled “SafeTtemp”) on the timer
assembly. When the cam timer assembly completes the wash cycle, and approaches the fi nal rinse
portion of the cycle, the Safety-Temp micro switch will drop into the cam slot and pause the cam timer
assembly if the booster heater has not reached 180 degrees. The machine will remain in wash cycle
mode until 180 degree rinse temperature is met, and at this time the cam timer will advance automatically into the rinse cycle and dispense 180 degrees rinse water over the dishes.
Note: If the Safety-Temp cam is not to be used, it becomes a spare cam.
Safety-Temp Installation Instructions
1. Remove the 4 cam timer assembly (note wire colors and wire placement for all 4 cam timer micro
switches) and install the 5 cam timer in its place.
2. Place all wires removed from 4 cam timer assembly in the exact position on the 5 cam timer
assembly.
3. The cam timer motor receives (1) yellow wire and (1) white wire (re-connect the yellow wire only
from the glasswasher harness to the motor).
4. The Safety-Temp 5 cam timer assembly kit includes two white harnesses – connect the white wire
with the female bullet connector to the timer motor, the stripped end to the #22/NC on the contactor,
and the spade end to the center terminal on the fi fth micro switch.
5. Connect white wire with male bullet connector from the kit to the white wire with female bullet connector coming from glasswasher harness, stripped end to #21/NC on contactor, and the spade end to
the top terminal on the fi fth micro switch.
Printed in USA 8
Commercial Glasswasher Installation & Operation Manual
Booster Heater Setup
The booster tank must be fi lled with water before the heating element is energized. For this reason, the
“High Limit Switch” has intentionally been disconnected at the factory and will require re-connection
before the heating element will turn on.
Follow the procedure below to complete the initial installation:
1. Close the door on the machine.
2. Turn the Power switch to the “ON” position.
3. Hold the “FILL” switch in until water overfl ows into the scrap tray.
4. Turn the Power switch to the “OFF” position.
5. Connect the blue wire with the disconnect, identifi ed by a red tag, to the High Limit Switch, which is
located behind the thermostat behind the front kick panel.
Installer Checklist
Glasswasher checked for concealed damage
Hot water supply is 140° F (60 C) — minimum
Incoming water supply line is ½” — minimum
Incoming water supply is 6 GPM minimum at 24 psi
Supply circuit breaker for machine is properly sized (50 amp)
Service voltage and phase type are correct to machine data plate
If drain pump is used, drain hose rises 12 to 16” before dropping to drain
Drain hose is installed with air gap (discharge 1” above drain)
Glasswasher is properly grounded
Glasswasher is properly leveled
Machine circuit breaker is labeled “GLASSWASHER”
Machine has been “hard-wired” with correctly sized wire
Booster tank has been fi lled with water (before High Limit Switch is reset)
High Limit Switch for heater has been reset (after Booster Tank has been fi lled)
Printed in USA 9
Commercial Glasswasher Installation & Operation Manual
OPERATION
Initial Setup
Dema Flow Disc
The Dema Flow Disc has been placed on the exit side of the water valve. The Flow Disc reduces
pressure to the standard recommended 20 psi.
Rinse and Wash Temperatures
1. Turn the Power switch to the “ON” position.
2. After the machine has warmed up for about ten minutes, note the wash and rinse temperatures. The
wash temperature must be 155°F minimum. The rinse temperature must be 180°F minimum. If
necessary, adjust the temperatures by removing the front kick panel and turning the thermostat
adjustment clockwise to increase, or counterclockwise to decrease. This one adjustment controls both
temperatures.
Post Instructions
1. Install wall chart and instruct machine operator on proper cleaning and operation of the PKHT24.
Startup Procedures
1. Open the door of the machine and check that the scrap screen is in place, and that the spray arms
and end plugs are secure.
2. Close the door of the machine and turn the Power switch to the “ON” position.
3. Hold the fi ll button about 25 seconds or until the water overfl ows into the scrap tray.
4. Once the water is fi lled to the proper level, press the rocker switch marked “START” – the machine
will automatically begin its cycle.
5. Check the machine’s operating temperatures and adjust if necessary. See the Rinse and Wash
Temperatures section above.
6. At the end of the wash period, drain the machine by pushing the rocker switch marked “DRAIN”.
Clean the wash tank screen and scrap tray screen. Remove and clean the spray arms. (See wall chart
instructions).
Printed in USA 10
Commercial Glasswasher Installation & Operation Manual
Printed in USA 11
Commercial Glasswasher Installation & Operation Manual
Printed in USA 12
Commercial Glasswasher Installation & Operation Manual
Quick Service Guide
TECHNICAL ISSUE CAUSE SOLUTION
Machine is not level or is leaning forward Adjust machine legs to level
Door leaks
Thermometer failure
Rinse water temperature too low/high
Pump motor not running
Pump motor runs continuously
Low water pressure in the nal rinse
Scrap trap over ows overnight Faulty water solenoid diaphragm Clean or replace diaphragm
Poor cleaning results
Wash tank will not drain
Wash arm end cap is missing Replace end cap
Door gasket issue Replace gasket
Loose wire at display, board or transformer Secure connectors
Faulty temperature sensing wire Correct, replace
Faulty temperature sending unit Replace unit
Faulty transformer Replace transformer
Scaled heating element Clean scale from heater
Booster heater’s thermostat not properly set Adjust thermostat
Incoming water temperature to booster
heater below 140 F
Loose lead connections Check and crimp connectors
Faulty #3 micro switch Replace micro switch
Faulty contactor Replace contactor
Faulty wash pump motor Replace wash pump motor
Faulty #3 micro switch Replace micro switch
Faulty contactor Replace contactor
Water regulator not adjusted properly Adjust regulator to 18-20 psi
Clogged nal rinse spray jets Clean jets
Missing nal rinse spray end cap Replace end cap
Low incoming water pressure from facility Increase pressure to 18-20 psi
Low wash or rinse water temperature Check temperature settings
Wash arm bearing or jets Clean bearing and arm jets
Rinse arm bearing or jets Clean bearing and arm jets
Tank discharge screen dirty Clean screen
Drain valve not operating Check power to drain valve
Drain valve faulty Replace drain valve
Adjust external water heater in
the facility
Printed in USA 13
Commercial Glasswasher Installation & Operation Manual
Troubleshooting
TECHNICAL ISSUE CAUSE SOLUTION
Machine inoperative
Motor inoperative
Motor runs with door open
Heater - No heat
Heater - Keeps running
Low heat during operation
Low rinse water pressure
Regulator at maximum but rinse
pressure still low
Low rinse water ow
No rinse water ow
Rinse water runs with door open Defective reed switch Replace reed switch
Power o at circuit breaker Reset circuit breaker
Defective power switch Replace power switch
Door is open Close door
Control panel is pulled out Secure control panel
Defective reed switch Replace reed switch
Defective timer assembly Replace timer assembly*
Defective pump motor contactor Replace contactor
Defective motor Replace motor
Defective reed switch Replace reed switch
Defective pump motor contactor Replace contactor
High limit switch opened or defective Reset or replace switch
Defective thermostat Replace thermostat
Defective heater contactor Replace heater contactor
Defective heater Replace heater
Defective thermostat Replace thermostat
Defective heater contactor Replace heater contactor
Low incoming water temperature (below 140 F)
Thermostat out of adjustment Adjust thermostat
Cold water mixing with supply
Defective heater Replace heater
Pressure regulator out of adjustment Adjust pressure regulator
Defective pressure gauge (actual pressure
is ne)
Insu cient water supply Supply larger supply line
Defective water solenoid valve Replace water solenoid valve
Low rinse water pressure
Rinse arm spray nozzles are limed De-lime rinse arm spray nozzles
Defective water solenoid valve Replace water solenoid valve
Defective (Rinse Relay) ice cube relay Replace ice cube relay
Turn up supply water heater or
insulate supply water pipe
Isolate hot water from cold
water
Replace pressure gauge
See “Low rinse water pressure”
in TECHNICAL ISSUE column
* The timer assembly motor or micro switches can be replaced independently if those are the only components that have
failed.
Printed in USA 14
Commercial Glasswasher Installation & Operation Manual
Troubleshooting
TECHNICAL ISSUE CAUSE SOLUTION
With power on, activating start switch
does not begin cycle
Start switch requires > 1 second
activation to run cycle
Activating fill switch does not
fill machine
Fill (rinse water) won’t shut o
Activating drain switch does not drain
machine
Cycle light does not light while
cycle runs
Power light does not light but
machine runs
Wash tank or nal rinse temperature
does not display
Both the wash tank temperature and
the nal rinse temperature do not
display
Wash tank or nal rinse displays wrong
temperature
Defective start switch (cycle light will not light
either)
Defective timer assembly Replace timer assembly*
Defective (Instant Start) ice cube relay Replace ice cube relay
Defective drain/ ll switch Replace drain/ ll switch
Defective water solenoid valve Replace water solenoid valve
Defective water solenoid valve Replace water solenoid valve
Defective drain/ ll switch Replace drain/ ll switch
Defective timer assembly Replace timer assembly*
Defective (Rinse Relay) ice cube relay Replace ice cube relay
Drain hose is kinked Un-kink drain hose
Defective drain/ ll switch Replace drain/ ll
Defective cycle light Replace cycle light (green)
Defective power light Replace power light (red)
Defective digital thermometer Replace digital thermometer
Defective thermometer transformer
Defective digital thermometer Replace digital thermometer
Defective thermister Replace thermister
Replace start switch
Replace thermometer
transformer
* The timer assembly motor or micro switches can be replaced independently if those are the only components that have
failed.
Printed in USA 15
Commercial Glasswasher Installation & Operation Manual
PARTS KIT
Parts Kit
Printed in USA 16
Commercial Glasswasher Installation & Operation Manual
CUSTOMER NOTICE
PKHT24 Installation Guidelines
Improper installation of this product may void the warranty on this machine. Please follow these
guidelines for recommended installation and to ensure the warranty of this model is applicable.
Glasswasher Installation Requirements
1. Machine must be level. Adjust leveling feet to accommodate uneven fl oor surfaces.
2. Drain height should not exceed maximum height of 16”. Connect supplied drain line to three-way
valve on back of machine and gravity feed to the fl oor drain.
3. Check the pressure. Recommended pressure is between 18-20 psi.
4. Water supply to machine must be a minimum 110°F.
5. A four-wire, (neutral, ground and two 110v lines) 220v single phase connection is required. There is
a six-foot cord provided with the machine. We recommend a minimum 50-amp dedicated circuit, but
you should consult your local building code requirements for proper breaker size.
Activating/Adjusting the Booster Heater
1. Booster heater must be fi lled with water prior to connecting the blue wire from high limit switch. The
high limit switch can be found by removing the front panel and locating the red button on the front of
the heater tank.
2. Once the booster heater has been connected, the thermostat should be adjusted to maintain 180°F
during the fi nal rinse cycle. The thermostat is located on the front of the booster tank and is acces-
sible by removing the front panel on the machine.
Automatic Dispensing Equipment
1. Applications utilizing automated dispensers for administering ware wash chemicals must use 110v
dispenser equipment. There is a 110v power block for installing this equipment inside the control
panel.
Printed in USA 17
Commercial Glasswasher Installation & Operation Manual
Electrical Diagram
Printed in USA 18
Commercial Glasswasher Installation & Operation Manual
Electrical Diagram
Printed in USA 19
PERLICK CORPORATION 8300 W. Good Hope Rd., Milwaukee, WI 53223 • (800) 558-5592 • perlick.com
Loading...