maintenance en 03-05
21
maintenance
Adjusting the pressure of the door seal 2
Replacing the counterweight pulleys and cables 3
Replacing the door seal, the window, or the door runners 4
Replacing the door 8
Replacing the compensating springs 10
Replacing the lower seal 11
Replacing the door catch spring 12
Replacing the guide rollers 12
Replacing the lower pressure roller 13
Replacing the upper pressure roller 13
Replacing the refractories 15
Working on the ventilation unit 16
List of spare parts 17
S21 M. En
02-05
2
12
Adjusting the pressure of the door seal
1 Using the 3 Allen key (M5), uns-
crew the 4 upper screws.
2 The holes are oblong. Press or
release the pressure along the full
width of the door. Check the align-
ment of the door with the body of
the fireplace. Retighten the screws.
- a hammer
- two flat screwdrivers of different
sizes
- a chain or wire or cord, about 1 m
- a 2.5 Allen key (M4)
- a 3 Allen key (M5)
- open-end spanners: 7, 8, and 12
- a sharp chisel
Maintenance requires a variety of tools
Some operations differ according to
the serial number. This number is vis-
ible on the upper right front, on the
return.
3S21 M. En
02-05
789
9 Reversing the procedure, re-assem-
ble the unit. Make sure that the
cable is correctly situated in the
groove of the pulley.
7 The parts that make up the pulley. 8 Be sure to lubricate the pulley. Use
"high temperature" oil.
1 2
1 Tilt the door. Unhook the cable. 2 To avoid "losing" the cable in the
convection chamber, attach it to the
chain. Let the counterweight down.
3 Using the 3 Allen key, unscrew the
2 screws that hold the bracket in
place.
4 Lower the bracket. 5 Take out the bracket, by turning it a
quarter turn.
6 Using the 12 mm open-end spanner
and a 3 Allen key, unscrew the pul-
ley from the bracket.
Replacing the counterweight pulleys and cables
3
456
S21 M. En
02-05
10 To replace the cable, follow the
same procedure as for replacing the
pulley.
11 12
1
11 The cable's connection to the
counterweight is accessible.
12 Close-up of the connection.
Replacing the door seal, the window, or the door runners
1 Using the cold handgrip, tilt the
door. Leave the cold handgrip in the
opening lug, in order to prevent the
door from sliding.
2 3
2 The seal is gripped between the seal
clamps.
3 Using a flat screwdriver, release the
end of the seal by opening the seal
clamps.
4
Door seal: photos 1 to 4 and 27 to 29
Window: photos 1 to 14 and 21 to 29
Door runners: photos 1 to 29 (except for 14)
1. Disassembly
11 Place something under the door to
support it horizontally. Protect the
paint on the door edge. Using the
cold handgrip, tilt the door. Leave the
cold handgrip in the opening lug, in
order to prevent the door from sliding.
5S21 M. En
02-05
6
6 Unhook the cables from the door.
4
4 Remove the seal along its full
length. Once it has been completely
removed, check that none has
been left in the grooves of the seal
5 Open the door slightly, and raise the
window. Using the 7 mm open-end
spanner, unscrew and remove the
5
7 Re-attach them in "standby" mode.
78 9
8 Using the 8 mm open-end spanner,
unscrew the damper cover plate.
9 Close the door, remove the damp
cover plate.
10
10 Using the cold handgrip, remove
the keys, releasing the compensation
springs.
12 Unscrew and remove
the stainless-steel
11 12
Warning:
The weight of the door is no longer offset by the springs, so the door
could swing heavily and cause damage!
21 Re(place) the window (check that
the Stûv logo is in the right posi-
tion). Tighten the stainless-steel
clamps, making sure that the lower
lug fits properly into the recess on
the door near the hinges.
21
20
20 Attention: the runner should be
placed with the 7 holes uppermost.
Screw the sliding door back on.
2. Reassembly
19 To reassemble, reverse the proce-
dure. Realign the stay bar.
19
6S21 M. En
02-05
13 Remove the (damaged) window.
13
17 Move the intermediary sliding
mechanism of the runner, allowing
access to the 4 screws (3 screws in
the Stûv 21/75).
18 Remove the damaged runner.
17 18
14 If you are replacing the window
(for fireplaces with serial numbers
lower than or equal to 0009396),
remove the felt seal and any glue
sticking to the doorframe.
14
15 Using the 2.5 Allen key, remove
the three countersunk head screws
M4 on each side.
16 Free the cold handgrip and remove
the sliding door.
15
16
X10:1
X
7S21 M. En
02-05
22 Re-attach the cables to the door.
22
23 Straighten up the door, raise the
window. Tighten the cap nuts on
the uppermost screw of the vertical
section.
24
24 Close the door, replace the two
compensation spring keys.
clé gauche
clé droite
26
25
26 Open the door; using the 8 mm
open-end spanner, tighten the
damper cover plate.
25 Replace the damper cover plate.
27
27 Using a flat screwdriver, push back
the stainless-steel lug to allow a
clearance of ± 2 mm.
28 29
29 Stretch the vertical parts. Apply the
excess seal to the upper part: this will
make sure it is airtight. Don't forget
to adjust the pressure of the door seal
(see page 2).
23
28 Replace the seal by sliding it in. In
the case of a new seal, it is delivered
in the correct length. Start with the
central part and then do the sides.
The ends of the seal reach the side
seal clamps. Be careful not to dam-
age the seal.
S21 M. En
02-05
8
Replacing the door
1 2
1 Using the cold handgrip, tilt the
door. Leave the cold handgrip in the
opening lug, in order to prevent the
door from sliding.
2 Unhook the cables from the door. 3 Re-attach them in "standby" mode.
4 Using the 8 open-end spanner, uns-
crew the damper cover plate.
5 Close the door and remove the
damper cover plate.
6 Remove the primary air damper.
3
4 5 6
7 Remove the secondary air damper.
Close the door.
9 You can access the M5 screws.
Using the 8 mm spanner, unscrew
these screws.
8 Using the cold handgrip, remove the
keys, releasing the compensation
springs.
7 8 9
The new door kit also includes 2 cylinders Ø 6mm (21/75 and 21/85) or Ø 8 mm (21/95 and 21/125)
1. Taking the door apart
9S21 M. En
02-05
10 & 11 Warning: the weight of the door is no longer offset by the springs, so
the door could swing heavily and cause damage! Tilt the door while
holding it firmly. Remove the whole door-and-hinges unit.
10 11
1 2
1 Place the 2 cylinders of 6 mm Ø (2175
& 2185) or 8 mm Ø (2195 & 21125)
provided. These make it possible to
adjust the height of the door properly.
2 Replace the door-and-hinges unit. 3 Close the door. It should rest on the
2 cylinders. Using the 8 mm span-
ner, tighten the M5 screws.
3
45
4 Tilt the door slightly, remove the 2
cylinders, close the door, replace the
two compensation spring keys.
5 Open the door. Replace the two
dampers.
6 Place the cover plate in position.
6
2. Reassembling the door
clé gauche
clé droite
S21 M. En
02-05
10
7 Using the 8 mm open-end spanner,
tighten the screws on the damper
cover plate.
8 Replace the 2 cables on the sliding
parts. Close the door.
7 8
1 2
Replacing the compensating springs
2 Uncover the springs. Using a
screwdriver, release the springs.
3 Using a flat screwdriver and an
8 open-end spanner, remove the
spring pin.
3
1 Take the door apart (see pages 8
& 9). Put the door down with the
external surface facing upwards.
4
4 Replace the springs. Check the
direction of the springs: the large
hooks should be attached to the
pin. Replace the door (see page 9).
11 S21 M. En
02-05
Replacing the lower seal
1 2
3 Remove the stainless steel bar and
the seal.
3
1 Three-sided door: Remove the damper cover plate, raise the window
as far as possible.
Four-sided door: Tilt the door, slide the window gently towards you.
2 Remove the M5 oval head screws.
4 5
5 Place the rear stainless-steel protec-
tive cover with the two screws at
the ends. Then position the stain-
less-steel support profile and insert
6 Insert the seal, adjust its position,
and tighten the M5 screws.
6
For serial numbers lower than or equal to 0009396:
(the kit you are given contains 2 stainless-steel bars and the seal in silicone)
12
2 Unscrew the M5 oval head screws. 3 Insert the seal, adjust its position,
and tighten the M5 screws.
3
1 Tilt the door.
Serial numbers higher than 0009396
4 Place the sharp chisel between the
body of the fireplace and the stain-
less-steel part. Shear off the rivets
holding the stainless-steel bar in
place. Throw out the 2 old bars!
S21 M. En
02-05
12
1
4
1 Tilt the door.
4 Slide the window towards you,
while supporting it, until the spring
(catch) is accessible.
5 Rotate the unit by 90°.
Replacing the door catch spring
5
6 Remove and replace the spring. To
reassemble, perform the same oper-
ations in reverse order.
6
2
2 Unhook the cables from the door. 3 Re-attach them in "standby" mode.
3
1
1 Open the door a little, raise the win-
dow slightly in order to have access
to the guide rollers.
Replacing the guide rollers
2
2 Unscrew and replace the rollers,
using the 12 open-end spanner.
3 Tighten the rollers, check their align-
ment, lower the window, and close
the door.
3
13 S21 M. En
02-05
123
3 Raise the guide 1 cm and rotate it
so as to be able to remove it from
its slots.
1 Tilt the door. 2 Unscrew the central M5 oval head
screw on the front.
1 Tilt the door.
4 Slide the window towards you, while
supporting it, until the spring (catch)
is accessible.
Replacing the lower pressure roller
Replacing the upper pressure roller
1
4
2
2 Unhook the cables from the door. 3 Re-attach them in "standby" mode.
Slide the window towards you until
it stops, while providing support for
its weight.
3
5 In order to have access to the pres-
sure roller, rotate the catch spring
by 90°.
5
6 Using the 8 mm open-end spanner,
replace the old roller. Be careful not
to damage the window. For reas-
sembly, carry out the same opera-
tions in reverse order.
6
14 S21 M. En
02-05
4
4 Take out the guide, giving it a quar-
ter turn.
5 Check the position of the pressure
roller before replacing it.
5
6 After replacing the roller, put the
guide back in (view from inside the
fireplace).
6
7
7 & 8 Insert the upper part of the guide in an opening that matches its shape.
8
9 Pull the guide towards you.
9
10
10 Tighten the central M5 oval head
screw on the front.
15 S21 M. En
02-05
Remove the damaged refractory stones. Check the position of the primary air
diffuser (figure 1 at the foot of the page).
Placing the refractories:
- make sure you always position the chamfer towards the interior of the fire-
place,
- follow the sequence set out in figures 1, 2, and 3 (depending on the model of
fireplace being lined).
Replacing the refractories
1
2
1
2
3
4
5
6
8
7
9
10
12
11
3
21/75, 21/85,
21/95
21/125
A
21/75 & 21/85 DF
For models 21/75, 21/85, and 21/95
single-sided:
- lining the bottom: place the rebated
refractories towards the back (to
receive the back refractories)
- place the side refractories as far for-
ward as possible (with the rebate
towards the front of the fireplace),
so as to be able to fit the refractories
lining the back,
- place the back ones as far to the
outside as possible, and then centre
them,
- finally, push the side refractories
towards the back (to hold in place
the refractories lining the back).
For model 21/125:
The same procedure applies to the
other single-sided models, but the 4
refractories without rebates go in the
centre of the rear wall.
For levels 2, 3, and 4, place the
respective locking pieces in front of
refractories nos. 16, 21, and 26.
For the double-sided models:
21/75 & 21/85 ds : centre all refractor
plates.
21/95 ds (fig.3') : fit refractors 1 & 5,
then 2, 3 & 4 and finish with sides.
21/125 ds (fig.3") : fit refractors 1, 2,
6 & 7, then 3, 4 & 5 and finish with
sides.
3'
21/95 DS
3"
21/125 DS
16 S21 M. En
02-05
1 2 3
3 Unscrew and remove the ventila-
tor. To reassemble, do the same in
reverse order. Be careful: for the
single-sided models, there is a cor-
rect direction for the floor of the
fireplace. For positioning the refrac-
tories, see above.
1 Place some protective material (for
example, a blanket) on the edge of
the fireplace, Take out the refracto-
ries and the primary air diffuser.
2 Unscrew and remove the floor of the
fireplace.
Working on the ventilation unit
Ne pas oublier de débrancher le courant avant toute intervention!
A
17 S21 M. En
02-05
List of spare parts for the Stûv 21 as of 09-03
Part description Page reference Part reference
paint spray MA010
counterweight support cable 2185 & 21125 (L: 1050 mm) page 4 photo 12 MA0912
counterweight support cable 2175 (L: 941 mm) page 4 photo 12 MA0911
counterweight support cable 2195 (L: 1160 mm) page 4 photo 12 MA0913
runner Accuride GC 2726-0045 page 6 photo 18 MA090
damper cover plate (3 sides) 2175 page 5 photo 9 SAV2175P610
damper cover plate (3 sides) 2185 page 5 photo 9 SAV2185P610
damper cover plate (3 sides) 2195 page 5 photo 9 SAV2195P610
damper cover plate (3 sides) 21125 page 5 photo 9 SAV21125P610
damper cover plate (4 sides) 2175 page 5 photo 9 SAV2175P410
damper cover plate (4 sides) 2185 page 5 photo 9 SAV2185P410
damper cover plate (4 sides) 2195 page 5 photo 9 SAV2195P410
damper cover plate (4 sides) 21125 page 5 photo 9 SAV21125P410
primary air deflector 2175 page 15 photo 1 (below) SAV2175P170
primary air deflector 2185 page 15 photo 1 (below) SAV2185P170
primary air deflector 2195 page 15 photo 1 (below) SAV2195P170
primary air deflector 21125 page 15 photo 1 (below) SAV21125P170
Guitel pulley model 21 page 3 photo 7 MA009
silicone seal THT black (MA0069) 2175 (L: 590 mm) page 11 photo 3 (below) SAV2175JSI
silicone seal THT black (MA0069) 2185 (L: 690 mm) page 11 photo 3 (below) SAV2185JSI
silicone seal THT black (MA0069) 2195 (L: 790 mm) page 11 photo 3 (below) SAV2195JSI
silicone seal THT black (MA0069) 21125 (L: 1090 mm) page 11 photo 3 (below) SAV21125JSI
clamp for silicone seal+protective cover (PCE 690-700) 2175 page 11 photo 3 (above) SAV2175KPRINOX
clamp for silicone seal+protective cover (PCE 690-700) 2185 page 11 photo 3 (above) SAV2185KPRINOX
clamp for silicone seal+protective cover (PCE 690-700) 2195 page 11 photo 3 (above) SAV2195KPRINOX
clamp for silicone seal+protective cover (PCE 690-700) 21125 page 11 photo 3 (above) SAV21125KPRINOX
door seal black (MA006403) 2175 (L: 1630 mm) page 4 photo 2 & 3 SAV2175JPO
door seal black (MA006403) 2185 (L: 1890 mm) page 4 photo 2 & 3 SAV2185JPO
door seal black (MA006403) 2195 (L: 2150 mm) page 4 photo 2 & 3 SAV2195JPO
door seal black (MA006403) 21125 (L: 2290 mm) page 4 photo 2 & 3 SAV21125JPO
seal clamp kit 2175 (PCES 710-720-730) page 5 photo 8 SAV2175KPJINOX
seal clamp kit 2185 (PCES 710-720-730) page 5 photo 8 SAV2185KPJINOX
seal clamp kit 2195 (PCES 710-720-730) page 5 photo 8 SAV2195KPJINOX
seal clamp kit 21125 (PCES 710-720-730) page 5 photo 8 SAV21125KPJINOX
speed variator, built-in or visible VENT01322
Stûv 2175 refractories single-sided page 15 photo 1 REFR2175SF
Stûv 2175 refractories double-sided page 15 photo 3 REFR2175DF
Stûv 2185 refractories single-sided page 15 photo 1 REFR2185SF
Stûv 2185 refractories double-sided page 15 photo 3 REFR2185DF
Stûv 2195 refractories single-sided page 15 photo 1 REFR2195SF
Stûv 21125 refractories single-sided page 15 photo 2 REFR21125SF
Stûv 21125 refractories single-sided "centre" page 15 photo 2 REFR21125SFCEN
Stûv 2115 refractory key single-sided page 15 photo 2 REFR21125SFCLEF
door button 21 (MA1707) + washer M5 (QUI041705) page 10 photo 4 SAV21KBPOR
window kit 2175 + seal (MA006402) page 6 photo 21 SAV2175KVITRE
window kit 2185 + seal (MA006402) page 6 photo 21 SAV2185KVITRE
window kit 2195 + seal (MA006402) page 6 photo 21 SAV2195KVITRE
window kit 21125 + seal (MA006402) page 6 photo 21 SAV21125KVITRE
Take care!
As Stûv fireplaces are constantly deve-
loping, do not forget to indicate the
fireplace production number when you
are ordering spare parts. That way,
you are certain of obtaining the right
part for your fireplace.
Concept & Forme sa - rue Jules Borbouse 4 - B5170 Bois-de-Villers (Belgium)
tel: 32 (0)81 43 47 96 - fax 32 (0)81 43 48 74
info@stuv.be - www.stuv.be
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