"Mini Finn" Heater Installation & Operation Instructions
WARNING
Do not take a sauna if using
alcohol, drugs or
medications.
Pregnant women or persons
with poor health should
consult their physician
before using any sauna.
Caution fire hazard: Do not
use the sauna room for
drying clothes, bathing
suits, etc. Do not hang
towels above heater or place
any object, other than the
"MINI FINN" SERIES SAUNA HEATERS
MODELS FU21 & FU30 (With built-in control)
Read all instructions carefully before installation. Please
leave all instructions and warranty with the owner.
rocks supplied, on the
heater. If any darkening of
the wall around the heater
is noticed discontinue
sauna use immediately.
WARNING
Prolonged exposure to elevated temperatures is capable of inducing
hyperthermia. Hyperthermia occurs when the internal temperature of
the body reaches several degrees above the normal body temperature
of 98.6°F. The symptoms of hyperthermia include an increase in the
normal temperature of the body, dizziness, lethargy, drowsiness, and
fainting. The effects of the hyperthermia include failure to perceive
heat, failure to recognize the need to exit the room, unawareness of
impending hazard, fetal damage in pregnant women, physical inability
to exit the room and unconsciousness.
WARNING
The use of alcohol, drugs, or medication is capable of greatly
increasing the risk of fatal hyperthermia.
SECTION 1: GENERAL INFORMATION
These heaters are UL approved for permanent installations and
electrical connections. Built with splash proof construction, the
conducting parts are protected against water. All wiring must be
performed in accordance with local codes. See Diagram 3 for wire and
room size requirements.
Inspect sauna regularly for
required maintenance to
heater, control and
benches. Replace wood
surfaces which show any
signs of deterioration.
The heater gets extremely
hot during operation and
should not be touched or
burns may result.
Minors should be
adequately supervised
whenever near a hot or
warming sauna.
These heaters are wall mounted, 15"W x 7"D x 17"H, with built in
controls.
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"Mini Finn" Heater Installation & Operation Instructions
DISTANCE
DISTANCE
DISTANCE
21T3"1 1/4"
1 1/4"
30T3"1 1/4"
2 1/2"
HEATER
MINIMUM
Floor Area
Height
Cu.Ft.
Height
Cu.Ft.
VAC
AMPS
SIZE
KW
MINIMUM ROOM
MAXIMUM ROOM
PHASE
Product Number
Page 2
DIAGRAM 1
DIAGRAM 2
MIN. DISTANCE FOR THE
MOUNTING BRACKET AND TO
COMBUSTIBLE MATERIAL
Backing
board
6 pcs
2 pcs
Refer to the drawings below (figs. 1A, 1B, &
"A"
1C) for the proper clearances to combustible
materials
Figure 1A 1B 1C
50"
min.
15" B C
B
Wall mounting bracket
3" min.
A
75"
min.
.
"B"
"C"
5" min.
HEATER
MODEL
FU21
1202-21-17
FU30
1202-30-17
FU30
1202-30-17
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2.1 8 sq. ft. 75" 45 84" 100 1
3 8 sq. ft. 75" 70 84" 150 1
Ceiling
DIAGRAM 3
Volume
Ceiling
Volume
120 17.5 12-2 W/G
84" 150 13 8 sq. ft. 75" 70
120 25 10-2 W/G
240 12.5 12-2 W/G
WIRE
"Mini Finn" Heater Installation & Operation Instructions
Page 3
SECTION 2: MOUNTING OF SAUNA HEATER
Using the heater mounting bracket as a guide, drill four 1/8" holes to
fasten the bracket to the wall. Attach the bracket with the ¼" x 1 ½"
screws supplied with the heater. The screws must be threaded through
the wall into a framing member or backing board to hold the heater
weight. See Diagram 2 for the necessary clearances to combustible
materials.
LEFT- AND RIGHT-HAND MOUNTING The heater is reversible.
You can choose to locate the heater timer and thermostat controls on
either the right or the left side for easy operation. To reverse the
heater, simply remove the rock guard from the top of the heater, rotate
them and reinstall .
PLACE THE HEATER ON THE BRACKET Line up the four holes at
the bottom of the heater with the four lugs on the mounting bracket as
shown in Diagram 1. Push the heater gently toward the wall, so the
lugs of the mounting bracket pass through the four holes in the heater.
Fasten the heater to the mounting bracket using the two #8 sheet metal
screws provided with the heater.
SECTION 3: PLACING OF ROCKS
The rocks supplied with the heater have been chosen to provide the
best heater performance. Use of any other type of rock will void the
heater's warranty. Never operate the heater without rocks in place!
Rinse the rocks with water before placing in the heater. Place the
larger rocks at the bottom and the smallest at the top. Place the rocks
loosely so that the air can circulate through the heater. Packing the
rocks too tightly may cause the heater control to disable heater
operation. The rocks must fully cover the heating elements. Atta ch the
guard with the screws provided.
WARNING
Fire sprinkler systems used
inside any sauna room
should be properly rated for
sauna room temperatures.
Do not pour chlorinated
pool or spa water on heater.
Excessive water use on
heater may cause damage
and void warranty.
Do not install a shower in
the sauna room.
Electric Shock Hazard -
High voltage exists within
this equipment. There are
no user serviceable parts in
this equipment. All
installation and service to
this equipment should be
performed by qualified
licensed personnel in
accordance with local and
national codes.
Do not construct sauna
room so as to restrict air
flow through the bottom of
the heater.
SECTION 4: ELECTRICAL HOOK-UP
Electrical installation must be made by a licensed electrician in
accordance with the National Electrical Code and local regulations.
Remove the heater's electrical box cover and connect the feed wires to
the terminal block. To determine the correct wire size, refer to
Diagram 3. Use copper supply wire only, suitable for minimum 90
degrees C. The heater must be grounded! See Diagram 6 for proper
connections.
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"Mini Finn" Heater Installation & Operation Instructions
DIAGRAM 5DIAGRAM 4
Page 4
ONE HOUR OPERATING ZONE FOR 9 HOUR
DELAY TIMER
This area from "OFF" to "ON" is the operating zone.
This is the only time the heater is on.
OFF
ON
9
1
8
2
7
3
6
5
DELAY ZONE
This area from "9" to "ON" is the delay zone, meaning
the heater can be programmed to come on up to nine
hours later. The heater will not operate in this area.
4
RESERVED FOR FUTURE USE
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"Mini Finn" Heater Installation & Operation Instructions
WARNING SECTION 5: HEATER SCREEN (GUARD RAIL)
Page 5
Install a wooden heater guard to prevent the sauna bather from
accidentally touching the sauna heater. Install the heater guard with
the clearances shown in Diagram 2.
SECTION 6: OPERATION
The heater is provided with a thermostat to adjust the sauna bath
temperature and a timer to control when the bath starts and stops. For
health and fire safety, never attempt to alter or bypass the timer or
thermostat.
SETTING THE TEMPERATURE The temperature can be adjusted
by turning the thermostat knob. To raise the temperature, turn the
knob clockwise; to lower the temperature, turn the knob counterclockwise.
SETTING THE TIME If you want the heater to begin heating
immediately, turn the dial clockwise past the first marked section
labeled "off to 1" (See Diagram 4), then turn the dial back (counterclockwise) until you feel it "click", near the on position, into the one
hour operating zone.
The heater has a "9 plus 1" timer, which means you can set the heater
to begin heating after a delay of up to 9 hours.
Do not locate benches over
heater. Minimum height of
ceiling above heater 50".
Minimum clearance from
heater to wooden surfaces
(benches, side walls, heater
fence etc.) is shown in
diagram 2. Mounting
brackets supplied provide
proper clearance to wall
behind heater.
Use only copper wire of the
size and type indicated in
the Heater Specification
Chart and the temperature
rating indicated on the
heater junction box.
All heaters and controls
must be grounded per NEC
to prevent electrical shock
in case of unit failure.
If you set the timer dial in the "1 to 9" zone, the heater will
automatically turn on after the selected delay time has elapsed.
Electrical outlets or
receptacle must not be
installed in a sauna room.
A guardrail or fence is
required around the heater
SECTION 7: LIMIT CONTROL
to prevent burns from
accidental contact.
The sauna heater has a built-in high limit control, which automatically
turns off the heater if the temperature inside in the sauna room rises to
an abnormally high level.
To restart the heater, let the heater cool and the timer run down to zero
(off), then contact your local dealer or a service representative at
1-800-346-6536.
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"Mini Finn" Heater Installation & Operation Instructions
DIAGRAM 6
1 x 2100W 120V
1 x 1700W 120V
1
2 x 1500W 120V
1
2
Page 6
4.7K
min.
3.5W
1 2 3 4 5 6
1 2 3 4 5 6
N L Gr
M
a
a1
b0
b
a1
a
b
b0
Timer
1h+9h preset
2100W or
3000W
120V AC
3000W
V S
U R
1 x 2100W
240V
1
1 2 3 4 5 6
L1 L2 Gr
See Diagram 3 for supply connections copper wire size.
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240V AC
2100W
240V AC
L1 L2 Gr
354 SKMB 8 F
"Mini Finn" Heater Installation & Operation Instructions
SECTION 8: HOW TO TAKE A SAUNA
• When taking a sauna, allow time to relax completely.
• Remove clothing and jewelry.
• After 10 minutes or when perspiration begins, leave sauna and relax
in dressing area...follow with a cool shower.
• Cooling time should equal time spent in sauna. Enter sauna room
again and stay 5 or 10 minutes.
• Repeat the cycle 2 or 3 times; end with a brisk shower...rinse in cool
water.
• Dress when completely dry and perspiration has stopped.
• Some sauna bathers enjoy the soothing effect of steam by splashing
water on the heated sauna rocks. Use only one dipper full (approx. ½
cup) at a time and take care to keep clear of the steam as it rises off the
rocks.
• Do not smoke, exercise or drink alcoholic beverages in the sauna
room.
• Do not pour chlorinated pool or spa water on the heater or corrosion
damage may result.
Shower
Sauna (10 - 15 min.)
Page 7
Shower or swim
Rest (10 - 15 min.)
Relax with juice or water
Like it?
Do it again and
feel great.
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"Mini Finn" Heater Installation & Operation Instructions
DIAGRAM 7 DIAGRAM 8
Page 8
TYPICAL PRE-CUT WALL CONSTRUCTION
2x4" framing
fiberglass insulation
foil vapor barrier
T&G soft wood
1/2" wallboard
1/2" wallboard
VENTILATION
Locate vent under
the top bench
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"Mini Finn" Heater Installation & Operation Instructions
WARNING SECTION 9: WARNING PLACARDS
Page 9
Two metal placards are included in the Installation Instruction
Envelope packaged with every Amerec Sauna Heater. The CAUTION
placard must be attached to the interior wall of the sauna room directly
above the heater where it is visible to the bather. The WARNING
placard must be attached to the door of the sauna room.
SECTION 10: ROOM CONSTRUCTION
For safety and reliability, the following rules must be addressed.
• No permanent locking or latch system can be used on the sauna door.
• Acceptable door fittings are: magnetic catches, friction catches,
spring or gravity loaded closures. The door must always open
outwards.
• No shower can be installed in a sauna room.
• No electrical receptacle shall be installed inside the sauna room.
• The enclosed WARNING: Reduce the risk of overheating …
warning plate must be mounted on or alongside the door outside the
sauna room at about eye level.
• The enclosed CAUTION: Reduce the risk of fire … caution plate
must be mounted on the interior wall above the heater.
• The heater must not be operated without its container properly filled
with rocks and the rock guard in place.
• If an intercom speaker is installed, it should be away from the heater
and as close to the floor as possible.
• If a room light is installed, it should be a surface mounted bracket
type. Wall mounted lights should be about 70" above the floor.
Ceiling mounted lights should be of an approved type with a junction
box that is remote to the fixture itself. Use only a fixture that uses A.F.
or fixture type internal wiring. A 60 watt bulb should provide
sufficient lighting .
• Fire sprinkler systems installed inside any sauna room must be
properly rated for sauna room temperatures.
• Always mount the heater according to these installation instructions.
The "CAUTION" and
"WARNING" placards
must be mounted in
accordance with Section 9.
For safety purpose sauna
door must open out and not
lock.
Never use a wood stain, seal
or preservative on the inside
of your sauna room.
Light fixtures get very hot
during operation. Locate
light fixture where it will
not be a burn hazard.
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"Mini Finn" Heater Installation & Operation Instructions
Page 10
SECTION 11: VENTILATION
VENTILATION should be changed about 6 times an hour. This can be achieved by making a vent opening
(fresh air inlet) in the sauna wall directly below the heater. The air outlet must be lower than the upper
benches, as far as possible from the heater and about two feet higher than the fresh air inlet vent,
See Diagram 8.
The minimum opening should be determined using one of the following formulas:
For R<31, V≥9.3
For R≥31, V≥0.3R
where R = the floor area of the room in square feet and
V = the minimum vent size in square inches
SECTION 12: MAINTENANCE
The sauna, like a bathroom, should be kept clean and odor free.
Towels or mats should always be used on benches and floor as perspiration otherwise penetrates the soft
wood.
Air out the sauna often by keeping the door and vents open when the sauna is not in use. Saunas that are in
daily use should be washed down at least once a week to keep them clean and the air fresh. Duckboard should
be removed from the sauna, the sauna floor mopped and dried in a conventional manner, and the duckboard
thoroughly scrubbed and dried before returning to the sauna room. The sauna heater should be wiped down
occasionally with a damp cloth to remove lint and dust. The rocks should be removed once a year for
cleaning and small or crumbled rocks replaced.
To clean and remove perspiration stains, use soap or detergent in warm water, best applied with a scrub
brush. Badly soiled surfaces may require sanding. Sand paper wrapped around a wooden block works well.
Benches and supporting structure must be inspected annually for potential deterioration due to age, dry rot or
abuse. Any boards with signs of deteriorations should be replaced immediately to avoid possible injury.
SECTION 13: TROUBLESHOOTING
For troubleshooting or service questions call 1-800-346-6536 and ask to speak with service.
sales@saunatec.com
techsupport@saunatec.com
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