Hotronic m4 power plus User manual

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TABLE OF CONTENTS
•CONTENTS IN BOX
•OVERVIEW
•TEMPERATURE & DURATION CHART
•OPERATING BATTERY PACK SETTINGS
•BATTERY PACK LED LIGHTS (LEDs)
•EXCESS HEAT ON ANY SETTING, INCLUDING OFF
•USING HEAT SETTINGS
•WHAT TO EXPECT OF HEAT SETTINGS
•COMFORT & WARMTH RANGES
•TIPS ON BATTERY PACK OPERATING TEMPERATURES
•TIPS ON USING FOOTWARMER
•DRY BOOTS! DRY SOCKS!
•ATTACHING BATTERY PACKS
•POSITIONING BATTERY PACKS
•RECHARGING BATTERY PACKS
•WHAT TO EXPECT OF BATTERY PACKS
•TIPS ON RECHARGING
•TIPS ON SUMMER & LONG TERM STORAGE
•INSTALLING HEATING ELEMENTS IN HOTRONIC’S HEAT READY
INSOLES
•INSTALLING HEATING ELEMENTS ON CUSTOM INSOLES
•INSTALLING INSOLES IN GENERAL FOOTWEAR
•INSTALLING INSOLES IN BOOTS WITH REMOVABLE LINERS
•TIPS ON INSTALLATION
•OTHER MISCELLANEOUS TIPS
•CAUTIONS REGARDING BURNS
•CAUTION: USE HOTRONIC BRAND COMPONENTS ONLY
•CAUTIONS REGARDING RECHARGING
•CAUTIONS
•HOTRONIC LIMITED WARRANTY
CONTENTS IN BOX
FootWarmer CUSTOM Power Plus m4 and Power Plus m3 both
contain:
•2 Battery Packs with Integrated Heat Regulator
•1 Pair of Heating Elements with Self-Adhesive Fabric Covers and
Strips
•1 Recharger (global input 100-240VAC, 50/60Hz) with North
American and European Plug Adapters
•Operating Instructions & Limited Warranty Card
OVERVIEW
The Hotronic FootWarmer is dedicated to your foot wherever it goes
and easily transfers from one type of footwear to another. Based on
computer technology, Battery Pack’s micro-controller permits four (4)
temperature-duration settings. High quality, rechargeable NiMH
batteries are selected for cold temperature performance. Heating
Elements locate directly under toes. Recharger globally accepts input
ranging from 100-240VAC, 50/60Hz. Following temperatures and
durations are approximations only as ratings are affected by recharging
process and various tolerances of batteries and electronics. Durations
are determined when Battery Packs are used in ambient temperature of
-4°F (-20°C).
- 6 -

- 7 -
TEMPERATURE & DURATION CHART
Approx. Avg. Temp. Range Duration Range
Set. °C °F Power Plus
m4
Power Plus
m3
1 28°-32° 83°-89° 19-21 hrs 15-17 hrs
2 36°-41° 96°-106° 7-9 hrs 5.5-7 hrs
3 40°-47° 105°-116° 5-6.5 hrs 3.5-5 hrs
4 57°-62° 135°-144° 2.5-3.75 hrs 2-3 hrs
OPERATING BATTERY PACK SETTINGS
1. To turn on or off, press-and-hold ON or OFF until LED light is ON
or OFF (~2.0 seconds).
2. To change setting, press-and-hold ◄or ►until setting LED light
changes (~0.5 seconds).
3. Once selected, setting 4 auto-resets to setting 3 after 3 minutes
(“timed setting 4”). (“Timed setting 4” LED lights are ON
continuously and do NOT blink.)
4. To use “continuous setting 4”, start at “timed setting 4”, then press
and hold ►until all LED lights blink (~5.0 seconds). (“Continuous
setting 4” LED lights BLINK continuously until setting is changed.)
5. DO NOT USE “TIMED SETTING 4” or ”CONTINUOUS SETTING
4” for more than three minutes at a time as it may become too hot
and may result in burns. SEE CAUTIONS REGARDING BURNS.
BATTERY PACK LED LIGHTS (LEDs)
1. Battery Pack LEDs indicate power is on or off and setting selected.
LEDs do not indicate charge level.
2. LEDs will not light when batteries are fully discharged, are below
minimum voltage cutoff level, or do not have enough power to heat
Element.
EXCESS HEAT ON ANY SETTING, INCLUDING OFF
1. WHEN BATTERY PACK LED stays ON and CANNOT BE TURNED
OFF, water may be around electrical contacts, may cause Heating
Element to become hot at any setting, and MAY RESULT IN BURNS.
See CAUTIONS REGARDING BURNS.
2. WHEN BATTERY PACK IS ON ANY SETTING, INCLUDING OFF,
and you feel your foot getting hot, you think you might be getting a
burn, or you experience any early warning sensations of a burn,
IMMEDIATELY UNPLUG Heating Element from Battery Pack and
IMMEDIATELY REMOVE your foot from FootWarmer. See
CAUTIONS REGARDING BURNS.
USING HEAT SETTINGS
1. Use FootWarmer to maintain comfort and warmth. (Note: Prevent
feet from getting cold. Warming cold feet requires more energy, is
less effective, and is not intended use of FootWarmer.)
2. Before going into cold, set at 1, 2, or 3 to maintain comfort and
warmth.
3. For additional burst of heat, set to “timed setting 4”. “Timed setting
4” auto-resets to setting 3 after 3 minutes.
4. DO NOT USE “TIMED SETTING 4” or ”CONTINUOUS SETTING
4” for more than three minutes at a time as it may become too hot
and may result in burns. SEE CAUTIONS REGARDING BURNS.
5. Heat does not thermostatically cycle on and off. Settings 1 and 2
maintain warmth AND save energy.
WHAT TO EXPECT OF HEAT SETTINGS
1. Expect imperceptible heat to maintain comfort and warmth.
2. Do not expect “fireplace toes”.
3. Learn what personally works best over time.
4. Think of your FootWarmer as Thermo Active Insulation (TM). As
cold penetrates through insole, it draws heat off Element rather than
toes. Balanced heat is imperceptible yet maintains comfort and

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warmth. Too much heat and feet feel excess heat. Too little heat and
feet feel cold penetrating through.
5. If feet are comfortable yet feel excess heat, turn to lower setting to
minimize perspiration and maximize battery duration.
6. If feet begin to feel cool, turn setting up to maintain comfort and
warmth.
7. If you think FootWarmer is not working, try turning left Battery Pack
off. If left foot becomes colder, FootWarmer is working.
8. Ability to feel heat and maintain comfort and warmth depends
upon: proper installation; type, fit, and dryness of footwear, sock,
and insole; foot callus size; activity levels; weather conditions; and
other factors.
9. Expect bottom of toes to feel heat less than fingers and hands.
COMFORT AND WARMTH RANGES
When first learning use of FootWarmer, following chart may help in
setting selection. Chart represents approximate ranges for comfort and
warmth maintenance. First determine outside temperature then select
setting based on personal sensitivity to cold. More sensitive select left of
range. Less sensitive select right..
COMFORT AND WARMTH RANGES
OUTSIDE TEMPERATURES
° C >0 0 -4 -7 -10 -12 -15 -18 -21
Setting F >32 32 25 20 15 10 5 0 -5
1 • • • • •
2 • • • • • •
3 • • • • • •
TIPS ON BATTERY PACK OPERATING TEMPERATURES
1. When going into temperatures below freezing (where Battery Packs
may be exposed), turn Battery Packs minimally to setting ONE as
this protects batteries from freezing and any harm that may occur
due to freezing.
2. Do not operate Battery Packs that have been OFF and in
temperatures below freezing as it may harm batteries and cause
Battery Packs to function improperly or not at all.
TIPS ON USING FOOTWARMER
1. Extremely poor circulation or extremely cold conditions may
require setting 2 or 3 for comfort and warmth. Extra Battery Packs
extend all day comfort and warmth.
2. Do not allow chair lift to hit you! Damage may result to you and
your FootWarmer.
3. Be careful walking down stairs! Battery Packs may catch stair edge
when mounted on back of boots.
4. Place heated insole (fabric surface up) directly underneath socked
foot. Do not place another insole over heated insole.
5. Proper fitting boots help maintain comfort and warmth. Tight boots
and improper fit restrict blood flow and compromise comfort and
warmth.
DRY BOOTS! DRY SOCKS!
1. If boots and socks are wet, expect cold feet.
2. Wet conductive heat loss is 23 times greater than dry heat loss. (W.
L. Gore & Associates, 1994)
3. Feet perspire more than any other part of your body except your
head and hands. Each foot perspires about 1/4 cup of water a day at
rest and one full cup when active. (W. L. Gore & Associates, 1994)
4. Maintain dry boots! Dry after each use! Each additional day of
moisture buildup makes warm feet more difficult. Consider boot
dryer (i.e., Hotronic’s Snapdry Boot & Glove Dryer).
5. Remove inner boots to dry between liner and boot shell.

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6. Maintain dry, clean socks! Change midday for afternoon comfort and
warmth.
7. Use single pair of medium weight socks. Select wool blend,
polypropylene®, or thermax® type socks to wick moisture away and
keep feet dry and warm.
8. Do not use thick socks, neoprene socks, or reflective sock liners as
these keep heat from toes.
9. Do not use cotton or other moisture absorbing socks.
ATTACHING BATTERY PACKS (Fig. 1-3, 8-13)
1. Slide Battery Pack Wire Clip SECURELY over boot top (see point 2
below), boot or shoe laces, or attach to strap such as Velcro® power
strap on ski or snowboard boot. (Fig. 1-2)
2. NOTE: DO NOT SLIDE BATTERY PACK OVER SLIPPERY
MATERIAL SUCH AS SKI BOOT PLASTIC AS THE EASIER IT SLIDES
ON, THE EASIER IT WILL SLIDE OFF. SECURELY ATTACH
BATTERY PACK AT ALL TIMES. (Fig. 3)
3. Mounting Bracket Accessory (optional). For simple, secure, quick
attachment of Battery Packs to ski or hard shell snowboard boots.
(Fig. 10)
4. Strap Bracket Accessory (optional). For simple, secure, quick
attachment of Battery Packs to ski or snowboard boot power straps.
(Fig. 9)
5. Slide Strap Bracket Accessory (optional). For Battery Pack Power
Plus m4 and m3 only. Provides simple, secure, quick attachment of
Battery Packs to ski or snowboard boot power straps. (Fig. 8)
6. Velcro® Attachment Strap Accessory (optional). Strap around leg at
or above calf or around boot top. Battery Pack clips over Strap.
(Fig. 11)
7. Extension Cord Accessory (optional). Run Cord underneath pant leg
and plug into Battery Pack at waist height (80 cm Cord) or chest
height (120 cm Cord). (Fig. 12-13)
POSITIONING BATTERY PACKS (SKI & SNOWBOARD BOOTS)
(Fig. 4-7)
1. Positioning Battery Pack HIGH on back of boot permits pant leg to
cover Battery Pack but increases potential chair lift damage. (Fig. 4)
2. Positioning Battery Pack LOW on back of boot reduces potential
chair lift damage but increases potential damage while walking
down stairs. (Fig. 5)
3. Positioning Battery Pack on TOP FRONT of boot permits pant leg to
cover Battery Pack, eliminates potential chair lift and stair damage,
and is convenient when adjusting setting. (Fig. 6)
4. Positioning Battery Pack on TOP LATERAL SIDE of boot (see Strap
Bracket and Slide Strap Bracket drawings) permits pant leg to cover
Battery Pack, eliminates potential chair lift and stair damage, and is
convenient when adjusting setting. (Fig. 7)
RECHARGING BATTERY PACKS
•CAUTION - WARRANTY: Use Hotronic’s White Plug Recharger
ONLY for Power Plus m4 and Power Plus m3 Battery Packs. Using
other than Hotronic’s White Plug Recharger voids Warranty.
•CONDITIONING CHARGE: When Battery Pack is new or has not
been used for more than 2 months, it is very important to charge
Battery Pack for 48 to 72 hours uninterrupted. Conditioning Charge
brings new, unused, or unconditioned Battery Pack to full capacity
potential.
•FULLY CHARGED IN 3 HOURS OR LESS: Hotronic’s White Plug
Recharger detects when Battery Pack is fully charged and
automatically switches to trickle current recharging after
approximately 3 hours or less of full current recharging. Fully
charged, properly conditioned Battery Pack reaches full capacity
potential. Fully charged, unconditioned Battery Pack does NOT
reach full capacity potential. (See Conditioning Charge.)