Follett FZR20-LB Setup guide

Installation, Operation and Service Manual
Serial numbers below J62764
Following installation, please forward this manual
totheappropriate operations person.
-20 C FZR20/25–LB
-30 C FZR20/25–PL
Order parts online
www.follettice.com
00981795R03
801 Church Lane • Easton, PA 18040, USA
Toll free [phone] • [phone]
www.follettice.com

200981795R03 – FZR20/25 LB, PL
Contents
Welcome to Follett. . . . . . . . . . . . . . . . . . . . . 3
Before you begin........................... 3
Specications ........................3
Ambients................................. 4
Clearances ............................... 4
Electrical specications ..................... 4
Refrigeration specications .................. 4
Detail drawing ............................. 4
Installation ...........................5
Adjust self-closing door ..................... 5
Install shelves (if equipped) and power up....... 5
Fill product simulation bottle .................. 6
Remote alarm connections (if desired) ......... 7
Dry contacts ........................... 7
RS-485 port ........................... 7
Third-party probe wire routing (if desired) ....... 7
Alarms.................................. 12
Alarm muting ............................ 12
Alarm volume selection .................... 13
Alarm silence ............................ 13
Password PIN security (default is 3843) ....... 14
To turn password on/off .................... 14
To make a new password PIN ............... 15
Min/max temperature logging................ 16
Probe calibration .......................... 16
Method 1 ............................ 16
Method 2 ............................ 18
Chart recorder set up (if so equipped) ......... 20
Chart recorder calibration................... 20
Changing the chart paper................... 20
Replacing the pen......................... 20
Removing drawers ........................ 21
Removing slides .......................... 21
Cleaning ............................21
Interior cleaning .......................... 21
Exterior cleaning.......................... 21
Annual cleaning and inspection .............. 22
Service .............................23
Refrigeration system....................... 23
Defrosting .............................. 23
Controller operation ....................... 24
Temperature sensor readings................ 24
Fascia heater cycle........................ 25
Changing temperature set point .............. 27
Defrost Settings .......................... 28
Test defrost/manual defrost ............ 30
Compressor Data ...................... 35
Troubleshooting .....................36
Before calling for service ................... 36
Appendix ...........................37
Control key functions ...................... 37
Menu Navigation table ..................... 37
Replacement parts ...................38
Unit cooler............................... 38
Cabinet ................................. 40
Facade ................................. 41
Door assembly ........................... 42

00981795R03 – REF20/25 LB, PL Welcome to Follett 3
Welcome to Follett
Follett equipment enjoys a well-deserved reputation for excellent performance, long-term reliability and outstanding
after-the-sale support. To ensure that this product delivers that same degree of service, we ask that you take a
moment to review this manual before beginning the installation. Should you have any questions or require technical
help at any point, please call our technical service group at [phone] or [phone].
Before you begin
After uncrating and removing all packing material, inspect the equipment for concealed shipping damage. If damage
is found, notify the shipper immediately and contact Follett Corporation so that we can help in the ling of a claim, if
necessary.
Check your paperwork to determine which conguration you have. Follett conguration numbers are designed to
provide information about the type of freezer you are receiving. Following is an explanation of the different item
numbers.
Model
Cubic foot capacity – 20, 25
Conguration – LB (Laboratory - shelves), PL (Plasma - drawers)
Door hinge – R(Right hand), L(Left hand)
Door heater – HT (fascia heater) on all models
Chart recorder option – 00 (No chart recorder), CR (Chart recorder)
FZR 20 LB R HT 00
Specications
FZR20-LB FZR25-LB FZR20-PL FZR25-PL
Capacity 19.7 cu ft (558L) 24.6 cu ft (697L) 19.7 cu ft (558L)/352
plasma packs (300 ml)
24.6 cu ft (697L)/472
plasma packs (300ml)
Storage
system
(4) epoxy-coated shelves (4) epoxy-coated shelves (8) stainless steel drawers (8) stainless steel drawers
Exterior width 29.75" (76cm) 29.75" (76cm) 29.75" (76cm) 29.75" (76cm)
Exterior depth 29" (74cm) 35" (89cm) 29" (74cm) 35" (89cm)
Exterior depth
withhandles
30.5" (78cm) 36.5" (93cm) 30.5" (78cm) 36.5" (93cm)
Exterior height
withcasters
79.5" (202cm) 79.5" (202cm) 79.5" (202cm) 79.5" (202cm)
Interior
dimensions
(W x D x H)
24" x 22.5" x 56"
(61cmx 58cm x 143cm)
24" x 28.5" x 56"
(61cmx73cm x 143cm)
24" x 22.5" x 56"
(61cmx 58cm x 143cm)
24" x 28.5" x 56"
(61cmx 73cm x 143cm)
Crated weight 438 lb (199 kg) 467 lb (212 kg) 556 lb (252 kg) 613 lb (278 kg)
Max. heat
rejection
2400 BTU/hr 2400 BTU/hr 2400 BTU/hr 2400 BTU/hr

4Specications 00981795R03 – REF20/25 LB, PL
Standard features – all models
Door Solid, insulated, stainless steel
Door handle ADA-compliant, full length handle with integral lock
Interior/exteriormaterial Heavy-duty, corrosion resistant stainless steel
Casters (4) dual-wheel swiveling casters with toe locks
Insulation 2.75" (7 cm) thick, CFC-free foam insulation throughout
Air circulation system Ducted air through back plenum openings (16 - PL, 12 - LB) with front face return
Temperature probe Stainless steel RTD (resistance temperature detectors). One at top on all models. One
at bottom on PL models
Ambients
Intended for indoor use where ambient temperature does not exceed 86 F (30 C) and ambient relative humidity
does not exceed 60% RH.
Clearances
To ensure proper ventilation of the refrigeration system, the following clearances are required:
§16 inches (41cm) above the freezer
§2 inches (5cm) behind freezer
§9 inches (23cm) on the left side. If the ambient is <86 F (30 C), no side clearance is required.
Electrical specications
§120 V, 60 Hz, 1 phase
§Full load amps: 12FLA, 67 LRA compressor
§Minimum circuit ampacity: 25A with max 60 ft. (18.2 m) wire run between receptacle and breaker using
minimum 12AWG
§Minimum voltage at compressor terminals: 97 Vac when energized
§Maximum size of branch circuit overcurrent device: 20A dedicated circuit
Refrigeration specications
Refrigerant R404a, 10.6 oz (300 g)
Detail drawing
FZR20
30.5" (78 cm)
FZR25
36.5" (93 cm)
76.75"
(195 cm)
79.5"
(202 cm)
29.75"
(76 cm)
16.0"
(41 cm)
Required Clearances
1.0" (3 cm) or
2.0" (6 cm) if
outlet located
directly behind
freezer)

00981795R03 – FZR20/25 LB, PL Installation 5
Installation
DANGER
• Do not tilt any unit further than 30° off vertical during uncrating or installation
• Refrigeration module area contains mechanical, moving parts. Keep hands and arms clear of this area at all
times. If access to this area is required, power to unit must be disconnected rst.
Fig. 1
1. Remove key attached to lock catch and unlock door.
2. Remove casters from box packed inside freezer.
Note: California facilities requiring wall and oor anchors – refer to wall anchor
kit instructions (#00938241) packed with seismic kit before proceeding with
caster installation.
3. Unbolt freezer from pallet.
4. Rotate freezer on pallet to install casters (Fig. 1.1).
5. Install casters by hand one at a time using channel locks to tighten, until
caster meets against the bottom of cabinet (Fig. 1.2).
6. Peel protective lm from exterior walls of stainless cabinet.
Adjust self-closing door
Fig. 2
1. Roll freezer to desired location and lock as many casters as possible
(Fig 2.1).
2. If the door appears to be sagging, remove the philips screw (Fig. 2.2)
holding the Hold Open Bracket to the Hinge Bracket to gain access to
the Sag Adjustment Screw (Fig. 2.3). Turn the Sag Adjustment Screw to
align the door squarely with the freezer cabinet. When nished, reinstall
the Hold Open Bracket.
3. Check door for closing tension and adjust if necessary. To check
closing tension, open door 1" (25.4 mm) and turn screw (Fig. 2.4)
counterclockwise until you achieve positive close. Then, turn another full
turn counterclockwise to ensure door has sufficient closing tension.
Install shelves (if equipped) and power up
Fig. 3
1. If freezer is equipped with shelves, remove bag containing shelf
supports and position them in desired locations on each pilaster and
insert shelves (Fig. 3).
2. Plug freezer into a 120 V 60 Hz 20A dedicated outlet.
1
2
2
1
3
Hold Open
Bracket
4
2
1
3

6Installation 00981795R03 – FZR20/25 LB, PL
Fill product simulation bottle
Fig. 4
1. Remove probe and cap from the top bottle and ll with solution used at
your facility (e.g., 60% glycerine and 40% water) (Fig. 4). Replace cap
and reinsert probe sensor.
2. If equipped with a bottom probe, perform same procedure for bottom
bottle.
ATTENTION INSTALLER
It is imperative that the top probe bottle be lled with a solution that your
facility uses to ensure proper operation of unit.
Fig. 5
3. Press lower left corner of front facade door to access power switch
inside (Fig. 5.1).
Fig. 6
4. Press power switch to turn unit on (Fig. 6.1).
5. Install (2) 9 V back-up interface batteries (Fig. 6.2) and (1) 9 V chart
recorder back-up battery (if equipped.)
1
1
2

00981795R03 – FZR20/25 LB, PL Installation 7
Remote alarm connections (if desired)
Fig. 7
Remote communication connections are located on back side of top facade
(Fig.7).
Dry contacts
• Connection to NO or NC contacts provides remote alarming capability
• No temperature data is communicated
RS-485 port
• Connection provides real-time data streaming
– Temperature
– Alarms
– Refrigeration operation
• MODBUS protocol
• Uses 6 pin, 4 conductor RJ11 jack (not supplied)
Third-party probe wire routing (if desired)
Fig. 8 (top view)
1. Use a drill or awl to prepare an opening to allow routing of the third-
party probe into the cabinet at the location shown (Fig. 8).
2. Use permagum sealant to cover hole opening after probe is routed into
cabinet.
RS485 Port
N/C
N/O
Common
Alarm Contacts

8Operation 00981795R03 – FZR20/25 LB, PL
Fig. 9
3. Remove front left and right return louver screws to uncover access port
(Fig.9).
4. Route probe wire down either side channel in cabinet.
5. Use permagum to seal around probe wire access hole.
6. Reinstall louver screws.
ACCESS PORT
SIDE CHANNEL
LOUVER SCREWS
Operation
Quick setup checklist
• Set time/date
• Change temperature display from factory default Celsius to Fahrenheit (if desired)
• Set high/low temperature alarms
• Select password access (if required)
• Set up chart recorder (if equipped)
• Verify solution is in bottle
DANGER
• Do not extend all of the drawers when fullyloaded to
avoid the possibility of the freezer tipping forward
• Refrigeration module area contains mechanical, moving
parts. Keep hands and arms clear of this area at all
times. If access to this area is required, power to unit
must be disconnected rst.

00981795R03 – FZR20/25 LB, PL Operation 9
Set time & date
ATTENTION
• The time/date are not retained in the event of a power interruption or if the batteries are dead.
• Change batteries with the unit powered up. Change one battery at a time to retain time/date. Failure to follow this
procedure will result in loss of time & date and will not provide accurate time and date stamping for high or low
temperature alarms.
Fig. 10
Set time and date for stamping of minimum and maximum temperatures.
1. Press Menu button (Fig. 10).
Fig. 11
2. Use to scroll and highlight Set time/date and press Enter to
select (Fig. 11).
Fig. 12
3. Adjust the year using and press NEXT.
4. Adjust the month using and press NEXT.
5. Adjust the day using and press NEXT.
6. Adjust the hour using and press NEXT. (24 HR Clock)
7. Adjust the minute using .
8. Press Enter to select values.
9. Press Back until the main temperature display screen is displayed.
Menu
-30.0C
Bottom Temp -30.0C
Refrig Controls
Password On/Off
PIN
Set Time/Date
-30.0C
Back Enter
Set year: 2009
2009 10/19 16:13
-30.0C
Next Enter

10 Operation 00981795R03 – FZR20/25 LB, PL
Change temperature display to show degrees
Fahrenheit (if desired)
Fig. 13
Follett has pre-set the temperature display to read in degrees Celsius. If
degrees Fahrenheit display is preferred:
1. Press Menu button (Fig. 13).
Fig. 14
2. Use to scroll and highlight Display Settings and press Enter to
select (Fig. 14).
3. Use to scroll and highlight Degrees F/C and press Enter to
select.
4. Use to scroll and highlight Fand press Enter to select.
5. Press Back button until the main temperature display screen is
displayed. Temperature is displayed in degrees F.
High and low alarm setup
Fig. 15
The high alarm is set to a default of 40 C (104 F) from the factory. This
default setting is used so that the alarm will not sound while the unit is
pulling down to temperature. The low alarm default setting is -40.0 C
(-40.0F).
After the unit has been installed and the system has stabilized
(approximately 90 min.), the high and low alarm set points should be
adjusted to desired settings.
1. Press Menu button (Fig. 15).
Fig. 16
2. Alarm Settings will be highlighted. Press Enter to select (Fig. 16).
Menu
-30.0C
Bottom Temp -30.0C
Alarm Settings
Display Settings
Min/Max Temperatures
Batt = 8.4V OK
30.0C
Back Enter
Menu
-30.0C
Bottom Temp -30.0C
Alarm Settings
Display Settings
Batt = 8.4V OK
Min/Max Temperatures
-30.0C
Back Enter

00981795R03 – FZR20/25 LB, PL Operation 11
Fig. 17
3. Use to scroll and highlight High Alarm Set and press Enter to
select (Fig. 17).
Fig. 18
4. Use to change set point and press Enter to accept (Fig. 18).
Fig. 19
5. Use to scroll and highlight Low Alarm Set and press Enter to
select (Fig. 19).
Fig. 20
6. Use to change set point and press Enter to accept (Fig. 20).
7. Press Back until the main temperature display screen is displayed.
High Alarm Set
Low Alarm Set
-30.0C
Back Enter
High Alarm Setpoint -30.0C
Back Enter
-18.0C
High Alarm Set
Low Alarm Set
-30.0C
Back Enter
Low Alarm Setpoint -30.0C
Back Enter
-40.0C

12 Operation 00981795R03 – FZR20/25 LB, PL
Alarms
The freezer has several alarms that will sound an audible and visual alarm. Alarm type is shown on the top line of
the alarm display and multiple alarms will show progressively on the display. A red LED, to the right of the display,
accompanies all alarms.
All active alarms are conveyed to remote alarm relays. Remote alarm relay provides a choice of either a normally
closed (NC) or normally open (NO) contact. It is recommended for use at 24 V 1A (relay is rated for 250 V 10A).
Alarm displayed Conditions
Temp Alarm Only top product temperature probe activates this alarm. Bottom product temperature
probe, if installed, is for display reference only.
Top Probe Error (RTD1) Activates with loss of signal from top probe (open or short circuit).
Bottom Probe Error
(RTD2)
Activates with loss of signal from bottom probe (open or short circuit).
Door Ajar Alarm Activates with door open longer than 1 minute.
AC Power Alarm Activates after 2 min delay with loss of AC power.
Display backlight will turn off to conserve battery life, but pressing any button will brighten
display for 30 seconds.
Low Battery Alarms Display activates when (2) 9V controller back-up batteries decrease to 7.5 V (maximum
4hr back-up time remaining.) This alarm will audibly chirp every 5 minutes.
Chart recorder – LED ashes green.
All batteries should be changed at same time. Replace batteries one at a time with
AC power on to keep correct time/date.
Evap Probe Error
(NTC1)
Activates with loss of signal from refrigeration control evaporator probe (open or short
circuit). Freezer goes into a xed on/off cycle until corrected. Default settings are
6minutes compressor on time and 5 minutes compressor off time. Cycle on time and off
time are adjustable in faulty probe cycle sub-menu of refrigeration controls menu.
Defr Probe Error
(NTC2)
Activates with loss of signal from NTC2 defrost probe (open or short circuit).
Alarm muting
Fig. 21
All audible alarms can be muted for up to 60 minutes in 5 minute
increments by pressing the MUTE button. The desired mute period will
display, and count down, in the window adjacent the MUTE label (Fig.21).
Door Ajar Alarm
MENU MUTE
-30.0C
15 min

00981795R03 – FZR20/25 LB, PL Operation 13
Alarm volume selection
Fig. 22
Factory default setting is “high”. To change volume of the alarm:
1. Press Menu button (Fig.22).
Fig. 23
2. Use to scroll and highlight Set Alarm Volume and press Enter to
select (Fig.23).
Fig. 24
3. Use to select the volume (high/medium/low) and press Enter to
select (Fig.24).
4. Press Back until the main temperature display screen is displayed.
Alarm silence
Fig. 25
Audible alarming can be turned off through the menu interface:
1. Press Menu button (Fig. 25).
Menu
-30.0C
Bottom Temp -30.0C
Set Alarm Volume
Alarm Silence
-30.0C
Back Enter
Buzzer Volume -30.0C
Back Enter
HIGH
Menu
-30.0C
Bottom Temp -30.0C

14 Operation 00981795R03 – FZR20/25 LB, PL
Fig. 26
2. Use to scroll and highlight Alarm Silence and press Enter to
select (Fig. 26).
Fig. 27
3. Use to select ON or OFF and press Enter to select (Fig. 27).
4. Press Back until main temperature display screen is displayed.
Fig. 28
Password PIN security (default is 3843)
If desired, access to the user selectable features and settings can be
controlled by a password PIN. The freezer ships with the password option
turned off. The default password PIN, if the password is turned on, is 3843.
This password pin number will always work.
To turn password on/off
1. Press Menu button (Fig.28).
Fig. 29
2. Use to scroll and highlight Password on/off option and press
Enter to select (Fig.29).
Set Alarm Volume
Alarm Silence
-30.0C
Back Enter
Audible Alarm-30.0C
Back Enter
ON
Menu
-30.0C
Bottom Temp -30.0C
Refrigeration Controls
Password on/off
PIN
Set Time/Date
-30.0C
Back Enter

00981795R03 – FZR20/25 LB, PL Operation 15
Fig. 30
3. Use to choose ON or OFF and press Enter to select (Fig.30).
4. Press Back until the main temperature display screen is displayed.
Fig. 31
To make a new password PIN
1. Press Menu button (Fig.31).
Fig. 32
2. Use to scroll and highlight PIN and press Enter to select
(Fig.32).
Fig. 33
3. Use to select the rst number of the 4 digit pin. Use the Next
button to move to the next digit, adjust with and repeat for the last
2 digits. Press Enter to select (Fig.33).
4. Press Back until the main temperature display screen is displayed.
Password-30.0C
Back Enter
OFF
Menu
-30.0C
Bottom Temp -30.0C
Refrigeration Controls
Password on/off
PIN
Set Time/Date
-30.0C
Back Enter
Enter 4 Digit Pin
Digit 1
3843
-30.0C
Next Enter

16 Operation 00981795R03 – FZR20/25 LB, PL
Min/max temperature logging
Fig. 34
The controller retains maximum and minimum temperatures since last reset
and provides a date and time stamp of when they occurred.
1. Press Menu button (Fig.34).
Fig. 35
2. Use to scroll and highlight Min/Max Temperatures and press
Enter to select (Fig.35).
Fig. 36
3. Use to select the min or max logged temperature (Fig. 36). Press
Enter to reset log.
4. Press Back until the main temperature display screen is displayed.
Probe calibration
Fig. 37
Follett freezer probes are calibrated to a known standard prior to leaving the
factory. Recalibration can be easily accomplished at any time, if desired:
Method 1
1. Using a separate temperature sensor and readout with an accuracy
better than ±0.3 C (0.5 F) at -30 C (-22 F) (a NIST traceable calibrated
probe and readout is preferred), place probe in same solution as RTDI
top product probe.
2. Close door.
3. Press Menu button (Fig.37).
Menu
-30.0C
Bottom Temp -30.0C
Alarm Settings
Display Settings
Min/Max Temperatures
Batt - 8.4V OK
-30.0C
Back Enter
Min = -31.9C
2009 10/19 12:10
Press Enter to Reset
-30.0C
Back Enter
Menu
-30.0C
Bottom Temp -30.0C

00981795R03 – FZR20/25 LB, PL Operation 17
Fig. 38
4. Use to scroll and highlight Refrigeration Controls (Fig.38).
Fig. 39
5. Press and hold Enter and Down ( ) button for 3 seconds, until new
submenu appears with Calibration highlighted (Fig.39).
6. Press the Enter button.
Fig. 40
7. With Cal Top Probe highlighted, press Enter to select (Fig.40).
Fig. 41
8. After the separate temperature sensor and readout stabilizes, adjust
the Cal temperature using so that it matches the reading from the
separate sensor and readout.
9. Press Enter button calibrating the top probe to the separate
temperature sensor and readout reading (Fig. 41). Repeat procedure if
calibrating the bottom probe.
10. Press Back until main temperature display screen is displayed.
ATTENTION
• Bottom temperature probe is only standard on plasma models
• If unit has the chart recorder option, refer to “Chart recorder calibration” on
page 20.
Refrigeration Controls
Password on/off
PIN
Set Time/Date
-30.0C
Back Enter
Calibration
Refrig Setpoint
Differential
High Setpoint Limit
Low Setpoint Limit
-30.0C
Back Enter
CAL Top Probe
CAL Bottom Probe
-30.0C
Back Enter
Set CAL TEMP W ^/
^
When Top Probe Stable
Press Enter
Cal -31.1C i Probe -30.8C
-30.0C
Back Enter

18 Operation 00981795R03 – FZR20/25 LB, PL
Fig. 42
Method 2
1. Remove upper temperature probe from probe bottle and completely
submerge into an ice bath.
Note: Ice bath should be densely compacted ice (ake, crushed, nugget, or
cracked) and a little water.
2. Press Menu button (Fig. 42).
Fig. 43
3. Use to scroll and highlight Refrigeration Controls, press and
hold Enter and together for 3 seconds (Fig.43).
Fig. 44
4. Calibration should be highlighted, press Enter to select (Fig.44).
Fig. 45
5. Cal Top Probe should be highlighted, press Enter to select (Fig.45).
Menu
-30.0C
Bottom Temp -30.0C

00981795R03 – FZR20/25 LB, PL Operation 19
Fig. 46
6. Use to scroll and highlight Refrigeration Controls (Fig.46).
Fig. 47
7. Press and hold Enter and Down ( ) button for 3 seconds, until new
submenu appears with Calibration highlighted (Fig.47).
8. Press the Enter button.
Fig. 48
9. With Cal Top Probe highlighted, press Enter to select (Fig.48).
Fig. 49
10. When probe temp stabilizes press Enter button calibrating it to 0.0C
(32 F) (Fig. 49). Wait one minute and press Enter button again to
conrm calibration.
11. Remove probe from ice bath and return to solution-lled probe bottle.
12. Press Back until main temperature display screen is displayed.
13. Repeat steps for bottom probe, if equipped.
ATTENTION
• Bottom temperature probe is only standard on plasma models
• If unit has the chart recorder option, refer to “Chart recorder calibration” on
page 19.
Refrigeration Controls
Password on/off
PIN
Set Time/Date
-30.0C
Back Enter
Calibration
Refrig Setpoint
Differential
High Setpoint Limit
Low Setpoint Limit
-30.0C
Back Enter
CAL Top Probe
CAL Bottom Probe
-30.0C
Back Enter
Set CAL TEMP W ^/
^
When Top Probe Stable
Press Enter
Cal -31.1C i Probe -30.8C
-30.0C
Back Enter

20 Operation 00981795R03 – FZR20/25 LB, PL
Chart recorder set up (if so equipped)
Fig. 50
The chart recorder is mounted in the front right of the facade behind the
door (Fig. 42). A package of 50 charts that record in C is included with your
freezer. If you have changed your display to show temperatures in F, you
will need different charts. Please call Follett at [phone] or
[phone] to order part number 00980888.
The chart recorder is powered by the controller and has its own battery
back up. An LED provides battery status info: Steady green = battery okay,
Flashing green = low battery or no power to the controller.
Chart recorder calibration
If desired, calibration should be done at the same time as probe calibration
(page 17) by pressing either the left or right arrow keys until it corresponds
with the calibrated product display temperature.
1. Press Left #1 or Right #2 arrow button (Fig. 40) for 5 seconds until pen
begins to move.
2. Continue to press #1 or #2 button to move pen to record same
temperature as probe.
Changing the chart paper
1. Press and hold #3 button until pen begins to move off chart.
2. Once the pen moves completely off chart, unscrew knob (counter-
clockwise) at center of chart.
3. Remove old chart and place new chart in position so that correct time
coincides with time line groove on recorder.
4. Reinstall knob.
5. Press and hold #3 button for approximately (1) one second until pen
begins to move back onto chart.
6. Make sure pen is marking paper. If not, carefully adjust arm so that
pen makes contact with paper.
Replacing the pen
1. To replace pen, press and hold the #3 button until pen starts to move
off chart.
2. Once pen has moved completely off chart, carefully lift pen up and
unsnap the “U” clip part to remove pen from metal pen arm.
3. Position new pen on metal pen arm and snap “U” clip underneath pen
around arm to secure.
4. Press and hold #3 button for approximately (1) second until pen begins
to move back onto chart.
5. Make sure pen is marking. If not, carefully adjust arm so that pen
makes contact with paper.