Vertex PureWaterCooler PWC-1800 User manual

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
SERVICE MANUAL
for
PureWaterCooler™
by Vertex
Model PWC-1800
P/N man-7011

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
Table of Contents
1. Introduction
2. Cooler Set-up
3. Remove Top Cover
4. Remove/Replace Float
5. Remove/Replace Hot Tank
6. Dispensing Solenoid – Remove/Replace
7. Circuit Board – Remove/Replace
8. Hot Tank Reset Button
9. Remove/Replace Hot Tank Thermal Sensors
10. Cold Temperature Adjustment
11. Drain Cooler Tanks
12. Remove/Replace Cold Temperature Switch and Sensor
13. Sanitization Procedure
14. Trouble Shooting
15. Specifications
16. Cooler Exploded View
17. Parts List
18. Schematics

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
PWC-1800 Cooler
1. Introduction
The PWC-1800 line of point of use coolers are designed to give years of reliable service.
The cooler has 1 spigot that dispenses filtered water at 2 different temperature levels – hot
and cold temperature water. The main (cold-temp) tank holds one gallon of water and is
constructed of stainless steel. The cold tank can be accessed for servicing the float
mechanism and for cleaning by removing the cooler main top cover (see section 4).
The hot tank is made of stainless steel and holds ½ gallon. It is important not to turn on the
hot tank when there is no water in it as this will damage the heating element.
The compressor is a sealed unit and is not serviceable in the field. The compressor can be
replaced by a qualified refrigeration technician with proper tools and equipment.
Please consult the factory if the compressor needs servicing.
CAUTION: If the compressor has been stopped by switching it off or unplugging power,
WAIT 10 MINUTES before turning the compressor on again. The compressor may stall
and burnout if powered back on without waiting.
The cooler makes clean water by filtration or by the reverse osmosis process. Water enters the
back of the cooler and then passes through the filtration system. A feed water ball valve is
located near the filters and must be turned to the on position to allow the unit to make water.
Electrical power is not required for the cooler to make purified water. CAUTION: The carbon
filtration versions of the cooler (PWC-1800F) should not be used with water hardness over
7 grains because of lime scale build up on the heating element. If hardness is higher than
7 grains, softening of the feed water is recommended or another option is to install
a “phosphate” filter to the filter system.

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
Feedwater/Drain Connections
-Feed Connection
2.1 Open hinged door to access filter
compartment
2.2 Remove feed water plug (orange) from back
of cooler.
2.3 Connect supplied orange feed water tubing to
feed connector on back of cooler.
2. Cooler Set-Up (for new cooler installation)

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
2.4 Make feed water connection to cold water line.
A self piercing saddle valve is provided.
2.5 Flushing carbon fines from carbon filter.
Most carbon filters have fine particles of
carbon material in the filter that will be
swept into the water stream when the first
water flows through the filter. Although not
harmful, these carbon fines in the water are
unsightly. Flush the carbon fines out of the
filter before filling cooler tanks with the
following procedure.
2.6 Remove outlet line of carbon filter (bottom)
2.7 Attach 3 feet of ¼” tubing to the carbon filter
outlet port (flush tubing)
2.8 Place flush tubing in bucket to catch water
and carbon fines.
2. Cooler Set-Up cont.
Use supplied self piercing saddle valve.
Connect to water inlet on cooler using 1/4”
tubing. Clamp saddle valve over copper feed
water line (cold water line only). Tighten
needle valve until tube is pierced. Retract
needle 1 -2 turns to start water flow.
Feedwater connection (RO & filtration coolers
(For use on copper tubing) )

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
2.9 Turn on feed water at source and turn ball valve
at filter to “on” to let the water flush the filter.
2.10 Flush until water flows clear (1 – 2 gallons)
2.11 Remove flush line. Reconnect tank line to
outlet of carbon filter
2.12 WARNING: Do not turn on cooler hot power
until cooler tanks are full of water.
-Drain Connection
2.13 Drain Connection (for units equipped
with RO)
2.14 Remove drain plug (black) from back of
cooler
2.15 Connect supplied black water tubing to
drain connector on back of cooler
2.16 Attach supplied drain saddle to a
standard 1 ½” drain pipe see fig. 1 below
Drain saddle connection method
Drain connection required only for cooler with reverse osmosis filtration
Figure 1
2. Cooler Set-Up cont.
Figure 2.7
RO filter set showing autovalve.
The autovalve automatically turns off the
water flow when the tanks are full

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
3.1 Remove (2) screws on back of cooler top cover
3.2 Slide cover back and up
3.3 Pop off cold tank lid using attached pull tab
3.4 Cold tank is now accessible for cleaning
and servicing other parts of the cooler.
3.5 Reinstall in reverse order
3. Top Cover Removal

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
4. Remove/Replace Mechanical Float Valve Assembly
4.1 First, remove top cover. See Section 3
Float Valve/Level Control
4.2 Using flathead screwdriver, pry the float
from the inlet.
4.3 Remove the float.
4.4 Reinstall in reverse order

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
5.1 Unplug power from wall
5.2 Drain water from cooler using front
spigots and by removing rear drain plug
5.3 Remove top cover (section 3)
REMOVE FRONT PANEL:
5.4 Remove 2 top screws from front of panel
5.5 Remove 2 screws from bottom of panel.
5.6 Remove control panel by lifting back side
of front panel and push on back side of control
panel.
5. Removing/Replacing Hot Tank
5.7 Remove control panel.

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
5.8 Pull straight up on front panel and then out to remove.
5.9 Since there are still wires connected to the control
panel and front panel, place them on top of the cooler.
(Make sure the panel is placed as shown in picture to
make further steps easier.)
5.10 Hot tank is now accessible
5.11 Remove silicon tubing from hot tank (4 places)
5. Removing/Replacing Hot Tank
Cont.

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
5.12 Remove (1) hot tank screw from below.
5.13 Remove (1) hot tank screw from above.
5.14 Pull hot tank down
5.15 Disconnect (4) electrical connectors
from hot tank temperature sensors and 2
wires from bottom heating element
terminals.
5.16 Hot tank can now be removed.
5.17 To replace the hot tank, reverse the
above procedure.
5. Removing/Replacing Hot Tank
Cont.

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
6.1 Remove top cover of cooler (section 3)
6.2 Remove control panel and front panel (as done in
section 5)
6.3 Remove (1) screw for solenoid mounting plate.
6.4 Remove (2) silicon tubes from solenoids.
6.5 Remove (2) solenoid connectors from control board.
6.6 Remove (4) mounting screws and remove mounting
plate.
6.7 Slide solenoid off of manifold.
6.8 Reassemble in reverse order.
Make note of the following:
a. Water flow through the solenoid is directional.
There is an arrow molded in the side of the solenoid body
showing water flow direction. Make sure the solenoid is
oriented correctly. Water can leak from the solenoid if not
installed correctly.
b. When installing electrical connectors into the
circuit board please note: the red female connector on the
board connects to the red male connector (hot solenoid)
and the blue female connector on the board connects to the
white male connector with one blue wire (cold solenoid).
6. Dispensing Solenoid – Remove/ Replace

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
7. Circuit Board – Remove/Replace
7.1 Remove the top cover (section 3)
7.2 Remove the control board (as done in section 5,
but no need to remove front panel)
7.3 Remove screw from back of control board.
7.4 Remove the (4) electrical connections from the
circuit board
7.5 Remove the (4) screws mounting the circuit
board. The circuit board is now free.
7.6 Reinstall circuit board in reverse order.

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
8.1 Observe that there are two circular sensors
attached to the hot tank. The lower one is the
main controller at 82 ºC and the upper senor
is the over-temp cut off.
The power switch for the hot tank (at the back
of the cooler) should not be turned on until
water can be dispensed from the hot spigot. If
the hot power is turned on without water in the
hot tank the heating element will over heat. To
prevent this, the upper thermal sensor on the
hot tank will cut power to the heating element
before any damage takes place. If this happens
the switch on the thermal sensor can be reset to
operational mode manually by the following
procedure.
8.2 Make sure the power cord is unplugged.
8.3 From the back of the cooler, find the hot tank
8.4 Find the upper thermal sensor on the hot tank
8.5 Using a long thin object such as a screw driver
or a pen, depress the small black button at the
center of the upper thermal switch. You should
feel a click when you depress the button. This
action resets the over-temp sensor.
8. Hot Tank Reset Button

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
9. Remove/Replace Thermal Sensor
9.1 The hot tank thermal sensors are located
on the outside of the hot tank. There are
two thermal sensors. The sensor located
lower on the hot tank controls the daily
operation of the heating element. The
upper thermal sensor is an overheat
safety switch and cuts power to the hot
tank should a malfunction occur and
the tank starts to overheat.
9.2 Unplug cooler from power source for
this operation.
9.3 Remove (2) screws holding the upper
part of the cooling grill to the cooler
cabinet. Keep the rubber grommets
for reassembly.
9.4 Carefully pull the cooling grill away
from the cooler. The grill is still attached
at the bottom. Do not move the grill
more than 30 degrees away from the
cooler frame or the cooling system may
be damaged.
30 degrees
Max

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
9.5 There are (2) thermal sensors attached with
screws to the hot tank. The lower sensor auto-
matically turns the heating element on and off
to maintain the water at 180 ºF. The upper
sensor is the over temperature sensor. This
sensor activates if the temperature on the tank
goes over 212 ºF. If this sensor is activated due
to a overheat condition, it will cut the power to
the heating element. If this happens, it can be
reset by pressing the button at the center of
the sensor.
To check if either thermal sensor is good, use a
continuity tester (ohm meter) to check for
continuity across the thermal sensor. Make
sure the thermal sensor is at ambient temperature
for this test. If there is no continuity, replace
the sensor.
9.6 To change either sensor, disconnect (2)
electrical terminals from sensor.
9.7 Remove (2) screws holding sensor to tank.
9.8 Install new thermal sensor, replace screws,
reconnect electrical terminals to sensor.
9.9 Carefully relocate cooling grill to original
location and re-attach using rubber grommets
and screws.
9. Remove/Replace Thermal Sensor
Cont.

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
10.1 The cold water temperature adjustment
is located on the back of the cooler on
the right side. An expansion tube senses
temperature in the cold tank and open
and closes the thermostat.
10.2 The cold adjustment is a shaft with a
screw driver slot on the end.
10.3 To make the water colder, using a
screw driver, rotate the shaft clockwise.
For warmer water rotate the shaft
counter clockwise. There are stops on
the adjustment shaft. DO NOT force
the control shaft over the stop. If this
happens, it will be necessary to replace
the temperature controller
10. Cold Tank Temperature Adjustment
STOP
COLDEST
270º Travel
STOP
WARMEST
Normal Travel is 270º

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
Completely draining the tanks is required when shipping the cooler
or when one the of the tanks needs replacing. This procedure will
allow you to remove all the water from the cooler.
11.1 Hot and Cold Tank Drain: Using a flat head
screw driver, pry the hot tank plug out until
you can grasp it with your fingers.
11.2 Remove the plug with fingers.
Water will pour from the port
11.3 Drain any remaining water in the
system by depressing the faucets.
11. Draining Cooler Tanks

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
12. Remove/Replace Cold Tank Sensor
12.1 The cold tank sensor is extremely reliable
and rarely needs replacing. Its function
is to control the cold water temperature by
turning the compressor on or off as needed.
12.2 Remove the top cover and cold tank lid
(sec. 3)
12.3 Remove the front panel and control panel
(as done is section 5)
12.4 Place the front panel on a nearby table and
let the tank cover and control panel hang in front
of the cooler so as to keep the area near the cold
tank clear.
12.5 Carefully lift off the insulting foam
from the cold tank
12.6 Cold tank cooling coils and sensor probe are
now visible.

PWC – 1800
PureWaterCooler
Copyright 2011 Vertex Water Products
12.7 Disconnect (2) wires from sensor switch
12.8 Remove (2) screws holding sensor switch
body to cooler cabinet.
12.9 Remove cold sensor switch and sensor tube
from cooler
12. Remove/Replace Cold Tank Sensor
Cont.