Viessmann VS 34 User manual

Model VS 34
Model VS 74
Model VS 87
Model VS 124
OWNER’S MANUA
How to operate your Demand ontrolled
Water Softener
Page
English Owner’s Manual
Viessmann
Water Softener . . . . . . . . . . . 1
Français Guide d’utilisation
Adoucisseur d’eau
Viessmann . . . . . . . . . . . . 33
Nederlands Gebruikershandleiding
Viessmann
Waterontharder . . . . . . . . 65
Italiano Manuale dell'utente
Addolcitore d’acqua
Viessmann . . . . . . . . . . . . 97
7388734 (Rev. B 10/20/21)

2
Variable Salt Dose: The salt dose is selected by the electronic controls at regeneration time based on the amount
needed.
Specificatio s & Dime sio s
Model VS 34 VS 74 VS 87 VS 124
Model ode VS34 VS74 VS87 VS124
Rated Softening apacity (mol @ kg Salt Dose)
2.4 @0.4
3.4 @0.7
4.5 @1.3
4.4 @0.65
7.4 @1.3
10.3 @3.6
5.8 @0.84
8.7 @1.4
11.7 @2.6
6.82 @1.09
12.4 @2.1
18.0 @3.9
Rated Efficiency (mol per kg @ Min. Salt Dose) 6.00 6.77 6.90 6.26
Service Flow Rate (L/min.) 15 24 28 27
Pressure Drop at Service Flow Rate (bar) 0.23 0.71 1 1
Intermittent Flow Rate (L/min.) @ 1 bar 33 28 28 27
Amount of High apacity Resin (liters) 8.9 14.2 17.2 23.1
Water Used during Recharge @ Min. Salt Dose (liters) 47 66 104 114
Water Used during Recharge @ Max. Salt Dose (liters) 44 68 106 103
Water Supply Max. lear Water Iron (ppm) 3 4 5 5
Min.-Max. Working Pressure (bar) 1.4 - 8.5
Min.-Max. Operating Temperature (° ) 4 - 49
Max. Flow Rate (L/min.) to Drain during Recharge 6.8
Model Nominal Resin
Tank Size
Salt Storage
Capacity
Dimension
A
Dimension
B
Dimension
C
VS 34 22.9 x 35.6 cm 19 kg 41.5 cm 29.1 cm 55 cm
VS 74 20.3 x 63.5 cm 25 kg 70 cm 58.4 cm 83.8 cm
VS 87 20.3 x 88.9 cm 68 kg 94 cm 83.8 cm 106.7 cm
VS 124 20.3 x 101.6 cm 79 kg 105.4 cm 95.3 cm 119.4 cm
IN - OUT
FIG. 1
32.4 cm
43.2 cm
8.6 cm
OUT
IN
A
B
C

3
P UMBING CODES
All plumbing must be completed in accordance with
national, state and local plumbing codes.
AIR GAP REQUIREMENTS
A drain is needed for recharge water (See Figure 2). A
floor drain, close to the water softener, is preferred. A
laundry tub, standpipe, etc. are other drain options.
Secure valve drain hose in place. Leave an air gap of
4 cm between the end of the hose and the drain. This
gap is needed to prevent backflow of sewer water into
the water softener. Do not put the end of the drain
hose into the drain.
AUNDRY TUBSTANDPIPE
4 cm
air gap
F OOR DRAIN
FIG. 2
4 cm
air gap
Drain
Hose
Drain
Hose
4 cm
air gap
OCATION REQUIREMENTS
onsider all of the following when selecting an installa-
tion location for the water softener.
=Do not locate the water softener where freezing
temperatures occur. Do not attempt to treat water
over 49º . Freezing temperatures or hot water
damage voids the warranty.
=To condition all water in the home, install the water
softener close to the water supply inlet, and
upstream of all other plumbing connections, except
outside water pipes. Outside faucets should remain
on hard water to avoid wasting conditioned water
and salt.
=A nearby drain is needed to carry away recharge
drain water. Use a floor drain, laundry tub, sump,
standpipe, or other options (check your local
codes). See "Air Gap Requirements" and "Valve
Drain Requirements" sections.
=The water softener works on 24V D electrical
power, supplied by a direct plug-in power supply
(included). Provide a nearby a 220-240V, 50 Hz
electrical outlet, in accordance with national and local
codes.
=Always install the water softener between the water
inlet and water heater. Any other installed water
conditioning equipment should be installed between
the water inlet and water softener (See Figure 3
below).
=Avoid installing in direct sunlight. Excessive sun
heat may cause distortion or other damage to non-
metallic parts.
Drain
Hose
THE PROPER ORDER TO INSTA WATER TREATMENT EQUIPMENT
FIG. 3
Pressure
Tank
City Water Supply
Well Water Supply
Well
Pump
OR
Optional
Sediment
Filter
Water
Heater
Water
Softener
Untreated Water to
Outside Faucets
Hot Water
to House
old Water
to House
I stallatio Requireme ts

4
I stallatio Requireme ts
VA VE DRAIN REQUIREMENTS
Using the flexible drain hose (included), measure and
cut to the length needed. Flexible drain hose is not
allowed in all localities (check your plumbing codes). If
local codes do not allow use of a flexible drain hose, a
rigid valve drain run must be used. Purchase a com-
pression fitting (1/4 NPT x 1.25 cm minimum tube) and
1.25 cm tubing from your local hardware store. Plumb
a rigid drain as needed (See Figure 5).
NOTE: Avoid drain hose runs longer than 9 meters.
Avoid elevating the hose more than 2.5 meters
above the floor. Make the valve drain line as
short and direct as possible.
IN ET / OUT ET P UMBING OPTIONS
Always install either a single bypass valve (provided),
as shown in Figure 6, or, if desired, parts for a 3 valve
bypass system (not included) can be purchased and
assembled, as shown in Figure 7. Bypass valves
allow you to turn off water to the softener for mainte-
nance if needed, but still have water in house pipes.
Pipe fittings must be 1.9 cm minimum.
Use:
=opper pipe
=Threaded pipe
=PEX ( rosslinked Polyethylene) pipe
=PV plastic pipe
=Other pipe approved for use with potable water
IMPORTANT: Do not solder with plumbing attached to
installation adaptors and single bypass
valve. Soldering heat will damage the
adaptors and valve.
FIG. 5
lip
Barbs
1/4 NPT
Threads
1.25 cm Outside
Dia. opper Tube
(not included)
ompression Fitting.
1/4 NPT x 1.25 cm O.D.
Tube (not included)
ut barbs from drain fit-
ting (pull clip to remove
fitting from valve)
FIG. 7
3 VA VE BYPASS
From Water
Softener
To Water
Softener
Inlet
Valve
Outlet
Valve
Bypass
Valve
FIG. 4
1/4” NPT
Thread Barbs for 9.5 mm
I.D. Tubing
Drain Hose
Hose lamp
FIG. 6
SING E BYPASS VA VE
Pull out for “Service”
(Soft water)
Push in for
“Bypass”

5
I stallatio I structio s
TURN OFF WATER SUPP Y
1. lose the main water supply valve, located near the
well pump or water meter.
2. Shut off the electric or fuel supply to the water
heater.
3. Open all faucets to drain all water from house pipes.
NOTE: Be sure not to drain water from the water
heater, as damage to the water heater ele-
ments could result.
ASSEMB Y
1. Viessmann softeners are factory assembled. During
installation, remove the salt lid and set it aside to
prevent damage. heck the brinewell to be sure it
is secured and vertical (See Figure 11). Slide the
faceplate cover forward to expose the softener valve
assembly.
2. Lift the brine valve out of the brinewell. Make sure
the float stem is parallel to the stand tube so the
seals will seat properly during operation. Place the
brine valve back into the bottom of the brinewell and
reinstall the brinewell cover.
3. Install the brine tank overflow grommet and elbow
into the 2 cm diameter hole in the back of the salt
storage tank wall.
MOVE THE UNIT INTO P ACE
1. Move the water softener into the desired location.
Set it on a solid, level surface.
IMPORTANT: Do not place shims directly under the
salt storage tank to level the softener.
The weight of the tank, when full of
water and salt, may cause the tank to
fracture at the shim.
continued on next page
TYPICA INSTA ATION
FIG. 8
Inlet
Outlet
lips
To Outside
Faucets
Single Bypass Valve
Lubricated
O-ring
onditioned
Water
Hard Water
Main Water Pipe
Plug-in
Power Supply
Water Softener
Valve
To
ontroller
Valve Drain
Elbow
*Do not connect
the water softener
valve drain tubing
to the salt storage
tank overflow
hose.
Overflow
Drain Elbow
NOTE: See “Air Gap Requirements” section.
NOTE: Water Softener shown with Salt Lid
and Top over removed
Pipe or
Flexible Hose
1” BSPT
Threaded
Adaptor
O-ring
Valve Drain
Hose*
Salt Storage
Tank Overflow
Hose*
To drain -
provide a
4 cm air gap