Wolf LH Operation And Maintenance Instructions
Operation and
Maintenance Instructions
Unit Heaters LH
(Translation of the original)
N° d’art. : 3040531_0711 Subject to modications
GB
Wolf GmbH · Postfach 1380 · 84048 Mainburg · Tél. 08751/74-0 · Fax 08751/741600 · Internet : www.wolf-heiztechnik.de
3040531_07112
Index
General ....................................................................................................................... 3
Symbols ...................................................................................................................... 3
Safety instructions ...................................................................................................... 4
Standards and regulations.......................................................................................... 4
Unit description ........................................................................................................... 4
Installation and operation instructions ........................................................................ 5
Prior to the installation ........................................................................................... 6 - 7
Installation instructions ........................................................................................ 8 - 10
Electrical connection..................................................................................................11
Switches ............................................................................................................ 12 - 14
Control devices for damper actuators....................................................................... 15
Thermostats.............................................................................................................. 16
Control system WRS ........................................................................................... 17-20
Actuators .................................................................................................................. 21
Push-button .............................................................................................................. 21
Intermediate terminal box ......................................................................................... 22
Maintenance ............................................................................................................. 23
Frost protection......................................................................................................... 23
Hydraulic adaption of unit heaters within a group..................................................... 24
Rain protection hood and roof lead-in box.......................................................... 25- 26
Notes ........................................................................................................................ 27
Index
3040531_0711 3
General
The present operation and maintenance instructions are exclusively applicable for Wolf
unit heaters LH.
Read these instructions carefully prior to the installation.
These instructions, as a part of the unit, have to be kept accessible.
No warranty claims will be accepted if operation and maintenance instructions are not
adhered to.
Symbols
The following symbols are used in these instructions. These important instructions
concern personal safety, as well as technical reliability.
"Safety instructions" are instructions with which you must comply exactly, to
prevent injury and material losses.
Danger through "live" electrical components.
Never touch electrical components or contacts when the ON/OFF switch is in
the ON position.
This creates a risk of electrocution, which may cause injury or death.
"Attention" indicates technical instructions which you must observe, to prevent
material losses and unit malfunctions.
In addition to the operation and maintenance instructions there are as well stick-on
labels on the unit, which have to be adhered to in the same manner.
Attention :
General / Symbols
3040531_07114
Safety instructions
Installation, commissioning, service and operation may only be carried out by qualied
personnel.
For electrical installations VDE regulations and local guidelines have to be adhered to.
The unit may only be operated within the capacity range indicated in the technical
documents of Messrs. Wolf.
The unit may only be applied for purposes of ventilation. It is ony suitable for air. The
air must not contain any hazardous, combustible, explosive, aggressive, corrosion
developing or any other dangerous substances.
The unit may only be operated in technically perfect condition. Any malfunction or damage
which may inuence the safety or perfect function of the unit have to be eliminated by
a recognized specialist, at once.
Damaged unit components may only be replaced by original Wolf - spare parts.
Only qualied electricians are allowed to perform work on electrical appliances or components, adhering to the electric regulations.
It is not allowed to work in the direct vicinity of a running fan. There is a risk of being
hurt by the running fan.
Before undertaking maintenance work, always ensure that the system main isolator /
the repair switch(es) are OFF and locked to prevent unintentional reactivation.
Safety Instructions / Standards,
Regulations / Unit Description
Wolf unit heaters consist of a zinc plated sheet steel casing. The casing is composed
of a self-supporting pentapost prole construction, which is welded and zinc plated, and
of zinc plated lateral casing panels.
The casing is provided with a LPHW-heating coil which consists either of copper tubes
and aluminium ns or galvanized, nned steel tubes.
The air inlet is provided with a unit consisting of an axial fan-motor-protection grille assembly which takes the air in via the air inlet in the rear panel. While passing the heat
exchanger on the discharge side the air is heated. The warm airstream may be turned
downwards via an adjustable discharge louvre.
General unit
description and design
Standards, Regulations
The following standards and regulations apply to the LH unit heaters:
- Machine directive 2006/42/EU
- Low voltage directive 2006/95/EU
- EMC directive 2004/108/EU
- DIN EN 12100 Safety of machines; general design principles
- DIN EN 13857 Safety of machines; safety distances
- DIN EN 349 Safety of machines; minimum distances
- DIN EN 953 Safety of machines; guards
- DIN EN 60204-1 Safety of machines; electric equipment
For the installation and maintenance, the following regulations and safety instructions have to be adhered to:
- DIN VDE 0100 Requirements for high voltage installations up to 1000 V
- DIN VDE 0105 Operation of high voltage installations, general restrictions
- DIN VDE 0701-0702 Repair, modication and testing of electrical appliances
3040531_0711 5
Motors
LH-three-phase motors (except explosion proof motors) may either operate on low spped
Y or on high speed ∆. The motor windings are designed accordingly.
Motors for single-phase alternating current may only oberate on high or low speed
depending on delivery.
LH-single-phase and three-phase motors (except explosion proof motors) are protected
with thermal cutours, which interrupt the control circuit of switch or step switch in case
of overheating of the fan motor.
When temperature decreases, the motor switches on automatically.
The winding protection wirks only in case of switching the therminal cutouts to the control
circuit of a switch of step switch.
Using switches or speed controllers not delivered by Wolf, we can´t take any
warranty!
Attention :
Heat exchanger
When connecting the heat exchanger counterhold with pipe-wrench.
The ow of the heating system has to be connected on the air discharge side of the
heat exchanger.
For steam:
Steam connection on top
Condensate return on bottom of discharge side
Connections on left hand side only, in direction of air ow
Evacuation of air and uid has to be provided on site!
Operation limits for LPHW/MPHW:
Heat exchanger Co./Al., type 1, 2, 3, 4, NP 16, up to 140°C (threaded sleeves)
Heat exchanger steel-galvanized, NP 10, up to 140°C (threaded sleeves)
Heat exchanger steel-galvanized, NP 10, up to 180°C (welded anges)
Operation limits for steam:
Heat exchanger Co./Al., type D, up to 9 bar saturated steam
Heat exchanger Co./Al., upt to 9 bar saturated steam
Attention :
In ceiling-mounted units there may occur damages by overheating when motor is swiched
off. For this reason the water inlet temperature has to be limited on:
Motor for higher surrounding temp. (on
request)
115°C when additional sections are
mounted (1)
140°C when additional sections are
mounted (2)
140°C without additional selections (2) 180°C without additional sections (2)
When fan stops all control valves have to be closed automatically.
Attention :
Ceiling-mounted unit
(1)
(2)
Installation and Operation Instructions
Electric heater
To avoid overheating, pay atenteion to the following minimum air volumes:
LH 25 40 63 100
Luftrichtung horizontal
V
min [m³/h] 800 1600 2500 4000
Luftrichtung vertikal
V
min [m³/h] 1000 2200 3200 5000
Protective measures: In any case it has to be secured that the electric heater is switched off when the air volume is falling below the indicated minimum. Additionally, the
electric heater may only be set into oberation by one or several magnetic swiches
whose control circuit leads over the automatic overheating controllers wired in line. Pay
attention to the fact that at least one automatic controller has to be mounted on top of
the electric heater.
In any case, protect against water
Attention :
3040531_07116
Clearances
Clearances for LH ceiling unit or wall
unit in metres
LH LH to LH LH to wall
25 7 - 9 3 - 4
40 9 - 11 3 - 5
63 11 - 13 4 - 6
100 13 - 15 5 - 7
Discharge accessories
referring to a.m. spacing, a ∆t air (= t discharge - t room) of approx. 25K and high
speed.
LH 25 40 63 100
Spacing:
Discharge/Floor
up to 2,5 m 4-side-discharge 4-side-discharge 4-side-discharge 4-side-discharge
3-4 m Wide spread
discharge
Wide spread
discharge
Wide spread
discharge
Wide spread
discharge
4-5 m Cone Cone Louvre Wide spread
5-6 m Cone Cone Cone Louvre
à partir de 6 m Cone Cone Cone Cone
If the temperature difference ∆t air exceeds 30K the above selection table is no longer
applicable, because of the reduced penetration.
Prior to the Installation
7-15m 7-15m 3-7m
Air throw
Spacing Spacing Spacing
Primary air Primary air
Larger throw for very
high rooms by means of
discharge cone
Four-side discharge for lower rooms
Secondary
vortex
Secondary
vortex
Primary air
larger throw
by approx. 25%
up to 2,5 m max.
3040531_0711 7
Prior to the Installation
Clearances
Clearances for wall-mounted units
and clearances for ceiling-mounted
units, vanes vertical.
Ceiling-mounted unit,
vanes deected.
LH 25 40 63 100
LH from LH
LH to wall
7 - 9m
3 - 4m
9 - 11m
3 - 5m
11 - 13m
4 - 6m
13 - 15m
5 - 7m
LH from LH
LH to wall
- 12m
4 - 6m
- 14m
5 - 7m
- 16m
6 - 8m
- 18m
7 - 9m
Height wall-mounted unit with
adaption cone and induction
louvre
A
B
F
C
D
E
A B C D E F
LH 6 3 1040 120 270 300 350 460
LH 1 0 0 1130 120 320 340 350 590
LH 63 100
Type 1 2 1 2
Max. height (m) 12 11 11 10
Higher above oor heights on request.
Air throw: wall-mounted unit
LH 25 40 63 100
Type 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
Air throw [m]*
high speed 19 18 16 15 27 26 23 21 29 27 25 23 36 35 34 32
low speed 16 15 13 12 20 19 16 14 22 20 18 17 30 28 26 25
* Figures represent air throws on dened operating conditions.
(mixing temperature 10 K above room temperature)
Air throw m
Angle of adjustment
Speed of air stream in utility
area 0,2m/sec.
0,2 m/sec.
Height above oor
min. 2,5m
max. 4,0m
LH 25 40 63 100
Type 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
Height above oor [m]* 5 4,5 4 3,5 6 5,5 5 4,5 7 6,5 6 5,5 8 7,5 7 6,5
*The optimum vane angle depends on the height above oor.
Higher above oor heights on request.
Height above oor,
ceiling-mounted unit
Angle of
adjustment
Speed of air stream in utility
area 0,2m/sec.
Height above oor [m]
3040531_07118
Installation Instructions
Suspension angles
Attach the suspension angles to LH-unit.
For mounting on the ceiling with horizontal air outlet, rst x screws Ø 8 mm (on site)
to the ceiling. Hang up LH-unit at key holes and tighten screws.
For sloping the LH-unit from the ceiling, insert threaded shaft (8 mm) from side through
slot of key holes and tighten by nut, counter-nut and 2 washers.
Depending on the construction of the ceiling, use appropriate screws and dowel pins,
if necessary.
Fix screws Ø 8 mm to wall.
Hang up LH-unit and suction accessory by means of key-holes and tighten screws.
For wall- mounted units exceeding a max. length Lmax. provide an additional support
or suspension on-site.
LH 100 with steel-galvanized heat exchangers type 2 and 3 require this additional
support or suspension already at a unit-length of L = Lmax.
LH 25 40 63 100
L
max.
[mm] 1100 1100 1100 1220
120
65
5
240
25
9
9
Threaded sheft
L
max
Suspension
Bracket
Support
Mounting brackets
Fit mounting brackets to LH-unit by means of enclosed screws.
Attach screws to wall of ceiling according to measure "c".
Hang up LH-unit by means of key holes of mounting brackets and tighten screws.
LH a b c d e f g h i
25 480 250 380 70 30 170 155 155 434
40 480 250 2 x 170 90 50 2 x 170 70 70 564
63 784 350 170+340+170 72 32 3 x 170 137 137 734
100 784 350 170+340+170 72 32 3 x 170 137 137 894
Dimensions en [mm]
a
c
l
b
f
d
g
h
e
x
x
x
x
x
x
3040531_0711 9
Installation Instructions
Prior to the application of fastening sets the static conditions of the concrete or
steel bars have to be checked and taken into account.
Assembly exclusively with basic units at a total depth of 300 mm.
Fixing
rail
Suspending
rail
Fastening
brackets
LH-Unit
Suspending rail
Fastening bracket
- Fasten xing rail with dowels and screws, provided on site, to the concrete bar.
- Fit fastening brackets to the unit with enclosed screws.
- Fit suspending rails to the fastening brackets with enclosed screws, washers and nuts.
- Hang total assembly (unit fastening brackets and suspending rails) into xing rail.
To prevent the unit from dropping before tting the pipework, the inferior suspending rail
may be secured additionally by tting it to the concrete bar with screws and dowels.
Fastening kit for concrete bar
vertical
Suitable for all types af steel bars at a ange width "b" of min. 100 mm up to max. 300
mm, and a ange thickness "t" of min. 6 mm up to max. 21 mm.
- Fit xing rail to steel bar with enclosed clamping jaws.
- Fit fastening brackets to the unit with enclosed screws.
- Fit suspending rails to the fastening brackets with enclosed screws, washers and nuts.
- Hang total assembly (unit, fastening brackets and suspending rails) into xing rail.
- Fit inferior suspending rail to steel bar with clamping jaws.
Fastening kit for steel bar
vertical
b
t
Fastening bracket
Fixing rail
Clamping jaws
Suspending rail
Fastening bracket
Suspending rail
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