Winterwarm WWH-EC User manual

INSTRUCTION MANUAL
UNIT AIR HEATER
TYPE WWH-EC; WWH-LT
Version EN 402f
THIS DOCUMENTATION MUST ABSOLUTELY BE READ BEFORE STARTING THE INSTALLATION.
INSTRUCT USER AND LEAVE THIS DOCUMENT WITH HEATER FOR REFERENCE.
Content
1 GENERAL 2
1.1 DESCRIPTION 2
1.2 FUNCTION 2
1.3 MATCHING CAPACITY HOT WATER BOILER AND WWH 2
1.4 GUARANTEE 2
2 TECHNICAL FEATURE 3
2.1 TABLE WITH DATA 3
2.2 USER’S RESTRICTIONS 5
2.3 PRE-CHECK 5
3 INSTALLATION 5
3.1 SUSPENSION 5
3.2 WATER CONNECTIONS 7
4 ELECTRICAL CONNECTION 8
4.1 230VAC SUPPLY 8
4.2 GENERAL FUNCTIONING OF THE UNIT 8
4.3 CONNECTING OPTIONS 8
4.4 CONTROL WITH ZONE VALVE 12
5 MAINTENANCE AND OPERATION 13
5.1 MAINTENANCE 13
5.2 SAFE OPERATION 13
5.3 FROST DAMAGE 13
6 WATER TEMPERATURES/ AIR VOLUMES 14
6.1 WWH-EC CAPACITIES AT SEVERAL WATER TEMPERATURES 14
6.2 WWH-LT CAPACITIES AT SEVERAL WATER TEMPERATURES 14
6.3 EXAMPLE 14

Instruction manual WWH-EC and WWH-LT Air heater Page 2/14
1 General
This user’s guide is meant for the installer and if necessary for the user. It’s a reference to operation and
installation of the WWH-EC and WWHLT. For a safe and effective function of this appliance it is strictly
necessary that this manual is applied correctly.
1.1 Description
The WWH is an effective in-direct fired heater.
The heat exchanger consists of copper tubes and aluminium fins. This is an approved design for an
optimal heat exchange.
The grill has been designed to accomplish an optimal air displacement at the lowest possible sound level.
With a (stepless) regulator or external voltage source is it possible to reduce the air output and noise
level.
1.2 Function
The WWH is in fact a radiator with a fan on the back. When hot water is pumped through the radiator, and
the fan is on, the heater will blow hot air. The heater will give no heat when the fan is off, no matter there
is hot water running through the radiator or not.
The heater requires a control (thermostat) to arrange the supply of hot water and to switch the fan on/off.
There are several options for control, this will be described later in this manual.
For a better air distribution it’s always better to choose 2 or more heaters instead of 1 heater. For
example, it’s better to select two 30kW heaters, instead of one 60kW heater.
1.3 Matching capacity hot water boiler and WWH
In case the capacity of the boiler is higher than that of the WWH, the boiler won’t be able to release all
the heat produced. This will cause the boiler to go on and off (commute). As a consequence of this the
installation won’t be able to reach the temperature demanded. For small installations it is advisable to
select a WWH which has an higher output than the boiler itself.
1.4 Guarantee
Operation and /or installation of appliances not according to this manual can imply invalidation of
guarantee.

Instruction manual WWH-EC and WWH-LT Air heater Page 3/14
2 Technical feature
2.1 Table with data
The WWH-EC is available in 8 models with capacities that differ from 10 to 80 kW. The range of 10-80
kW heaters is subdivided in 3 basic sizes. The type number of the appliance starts with the housing
model (1,2 and 3). See table below for exact dimensions.
Type
115EC
120EC
235EC
24
5EC
350EC
365EC
380EC
Model size 1 1 2 2 3 3 3
A 505 505 679 679 834 834 834
B 290 290 290 290 340 340 340
C 40 40 43 40 40 40 43
D ¾” ¾” ¾” 1” 1” 1” 1”
E 81 79.5 81 79.5 81 81 79.5
F 87.5 75 87 74.5 89.5 89.5 77
G 87.5 87.5 87 87 89.5 89.5 89.5
H 85 85 140 140 100 46 46
L 375 375 535 535 690 690 690
M 330 343 505 518 655 655 668
(*) at water temperature of 90°/70° and environmental temperature of 15°C.
Type Unit 115EC 120EC 235EC 245EC 350EC 365EC 380EC
Heating capacity (*) kW 14.7 19.7 27.8 42.4 46.4 54.4 76.7
Air output m
3
/h 2200 1950 3900 3500 6150 8500 7600
Throw horizontally m 16 14 22 19 21 25 21
Throw vertical m 5 5 7 6 7 8 7
Electrical supply V 230 230 230 230 230 230 230
Consumed current A 1.0 1.1 0.9 1.1 1.5 1.8 1.4
Power consumption W 111 123 200 250 320 400 308
Weight (incl. water) kg 20 21 31 32 44 61 65
Water connection (ext.) G ¾ ¾ ¾ 1 1 1 1
Water sided pressure loss kPa 3 3 4 5 4 7 9
Recommended susp. height m 2.5 2.5 2.5 2.5 2.5 2.5 2.5
Noise level (5m) dB(A) 35-54 35-54 35-59 35-57 35-60 35-56 35-54

Instruction manual WWH-EC and WWH-LT Air heater Page 4/14
De WWH-LT is available in 4 models. Besides heating through a boiler, the WWH-LT has specially been
developed for use in a low-temperature installation. In addition the WWH-LT model can be used for
cooling through a heat pump or a cooling pump.
Type
11
0LT
2
20LT
3
30LT
3
40LT
Model size 1 2 3 3
A 505 679 834 834
B 290 290 354 354
C 65 65 65 65
D ¾” 1” 1” 1”
E 81 79.5 81 79.5
F 87.5 74.5 89.5 77
87.5 87 89.5 89.5
H 85 140 46 46
L 375 535 690 690
M 330 518 655 668
N 34,5 34,5 36 36
O 93 93 137 137
Type Unit 110LT 220LT 330LT 340LT
Capacity * 45°/35°C kW 8.3 19.4 28.6 37.9
Cool capacity ** at 7°/12°C kW 6.6 16.5 19.2 32.1
Cool capacity ** at 15°/18°C kW 3.8 8.8 12.8 17.8
Cool capacity ** at 16°/19°C kW 3.4 7.9 11.7 16.1
Air output m
3
/hr 1850 4150 5450 8850
Throw horizontally m 14 21 20 25
Throw vertical m 5 7 7 8
Electrical supply V 230 230 230 230
Consumed current A 1.1 2.3 1.5 3.2
Power consumption W 118 515 320 718
Weight (incl. water) kg 22 34 66 68
Water connection (ext.) G ¾ 1 1 1
Water sided pressure loss kPa 4 11 30 30
Recommended susp. height m 2.5 2.5 2.5 2.5
Noise level (5m) dB(A) 35-54 35-64 35-60 35-62

Instruction manual WWH-EC and WWH-LT Air heater Page 5/14
2.2 User’s restrictions
Work pressure: max. 5 bar.
Water temperature: max. 100°C; min 4°C. (freezing danger!)
Environment temp.: max. 40°C; min 4°C. (freezing danger!)
Protection grade : IP00B
Note: frost can cause the internal copper tubes in the exchanger to burst, the exchanger will leak. No
warranty on this!
2.3 Pre-check
Before installing the heater, please check if the heater is in accordance with the order, and whether it
suites the local and present provisions (electrical supply etc.). The heater also has to meet local and
national legislations.
After installation ensure that the appliance is no hazard for persons or can cause damage in terms of
moisture, dust, inflammable or corrosive gases, smoke and/or combustible materials.
The competent installer must make sure that the heater functions correctly and must instruct the user
about safe operation of the heater.
3 Installation
3.1 Suspension
The WWH is provided with eight M10 suspension points on the side panels.
Use preferably the specially designed cantilever brackets or the ceiling mounting-set.
Take care that the heater is placed stable and that there is no tension on the water sided connections.
Wall setup: The pipe connections for water should always be horizontal, with a view to venting of the
internal pipes. The heater can be turned over slightly, but the heater may absolutely not hang askew.
Place the heater in such manner that, the return connection (cold water) is at the lowest point. It’s
important to place the venting in the duct near the heater.
In case de WWH-LT is used for cooling, make sure that the condensate discharge pipe is on the bottom
and that the air heater has been placed upright, enabling condensate to run out of the discharge system.
Condensate
discharge pipe

Instruction manual WWH-EC and WWH-LT Air heater Page 6/14
Ceilling set up: Again the pipe connections to the heater should be horizontal, to enable venting of the
internal tubes.. Place the heater high enough (minimally 2,5m) to avoid draught. If necessary use our
outlet cone or the 4-way down flow plenum. Application of a plenum will decrease the throw with factor 4.
The WWH-LT can’t be installed in a celling setup in case it is also used for cooling. This will cause
condensate dripping down from the air heater.
Types 115EC
120EC
110LT
235EC
245EC
220LT
350EC
365EC
380EC
3
30LT
Model size 1 2 3
A 505 679 834
N 200 200 200
P 240 240 290
R 181 181 -
S 714 957 -
The outlet grill can easily be taken off, turned around and
replaced, to direct the discharge in any desirable direction.
Attention: When replacing the grill, always use the same
screws (or screws of same length). A longer screw could
pierce the exchanger!
See to it that the discharge is not blocked and that the heater has
a free suction. Make sure that there’s sufficient circulation of air in
the room (enough ventilation) without the airstream being
considered as draft. Heaters suspended to the wall should always
blow in direction of the cold regions.

Instruction manual WWH-EC and WWH-LT Air heater Page 7/14
3.2 Water connections
Connections for hot water supply and return (two times ¾ inch or two times 1 inch) are marked with a red
and a blue sticker. Red is water supply and blue is water return. Do not twist these connections, the
heater will not give the desired output.
The WWH is not provided with a standard venting. There is the possibility to place one when it is desired.
Prevent mechanical tension on the connections, this will cause leakage.
Warning: Prevent damage to the heater,
hold the connections with pliers to avoid
twisting of welded parts of the
connections. Do not put excessive force!
Internal welds may break and cause
leakage.

Instruction manual WWH-EC and WWH-LT Air heater Page 8/14
4 Electrical connection
4.1 230Vac supply
The installation must comply with all applicable local and/or national standards.
There should be a suitable electrical group with a main fuse. There is an electrical diagram further on in
this guide.
The supply is 230Vac (50 Hz) with earth.
Isolation switch or power plug
The heater has to be equipped with a 230 Volt isolation switch or power plug. This switch should
disconnect phase and neutral (not earth) and have a 3mm contact opening at least. Switches or power
plugs must be accessible at all times.
4.2 General functioning of the unit
The WWH is simply described as a radiator with a ventilator at the back. If there is hot water flowing
through the radiator, and the heater is on, the heater will blow hot air. But when hot water is flowing
through the radiator and the heater is off, the heater will not discharge hot air. If the fan is turned on, but
the boiler water is cold, there could be draught. This must be prevented.
The installation should have some kind of control to make turning on/off the hot water boiler and the fan of
the WWH separately, possible. The WWH and the boiler are 2 separate systems. Both systems need to
be controlled. There are several ways to do this. It depends on the situation and needs of the user, what
combination of controls will work best.
4.3 Connecting options
4.3.1 Connection with only a room thermostat
This option is only possible when there is a continuous hot water supply. The hot water boiler should have
its own control.
Operation:
The on/off room thermostat will switch on the fan of the WWH when there is heat demand. The fan will
blow air over the heat exchanger. If the water is hot, the heater will discharge hot air. If the water is cold
the heater will blow cold air, this can be experienced as draught.
The boiler must be switched on/off separately. Therefore a second room thermostat is required.
M
L (230V AC)
T
1
3
2
Ruimte thermostaat
Room thermostat
Raumthermostat
Thermostat d´ambiance
art: IW.3950
Motor WWH
N

Instruction manual WWH-EC and WWH-LT Air heater Page 9/14
4.3.2 Connection with room thermostat combined with contact thermostat
This option is applied when the boiler is controlled by its own thermostat and there is a continues hot
water supply.
Operation:
The on/off thermostat will switch when there is heat demand. The contact thermostat will not close
(connect) before the water has reached the pre-set temperature. In this situation, the fan of the WWH will
transport hot air. This will prevent draught.
The boiler must be turned on and off separately.
4.3.3 Connection with contact thermostat.
This option is applied if the thermostat of the boiler is in the same room as the WWH.
Operation:
The contact thermostat will close if the water has reached the pre-set temperature. In this situation the
WWH will only discharge hot air.
The boiler thermostat will switch on the boiler. The boiler will pump hot water around. The contact
thermostat of the WWH will close if the water is hot enough. The fan will blow hot air into the room. If the
boiler is shut off by the boiler thermostat, the water will cool down and the contact thermostat will open
(disconnect) and will cause the WWH to stop blowing
L (230V AC)
T
13
2
N
Aanleg thermostaat
Contact thermostat
Rohranlegeregeler
Thermostat d´applique
art: IH8500
M
T
1
3
2
Ruimte thermostaat
Room thermostat
Raumthermostat
Thermostat d´ambiance
art: IW3950
Motor WWH
L (230V AC)
T
13
2
N
Aanleg thermostaat
Contact thermostat
Rohranlegeregeler
Thermostat d´applique
art: IH8500
M
Motor WWH

Instruction manual WWH-EC and WWH-LT Air heater Page 10/14
4.3.4 Combinations with a stepless switch.
To reduce the noise level of the WWH, it’s possible to install an optional stepless fan switch. This switch
will regulate the fan speed of the WWH. Please note that if the fan speed is lower, the heat discharge of
the heater will be lower as well.
The WWH with EC motor comes with several varieties.
Alternative 1, motor with internal connectors
Alternative 2, motor without connectors:
There are 3 alternatives for speed control:
1. Maximum speed only (factory setting)
2. With speed control
3. External via 0-10V
L1
N
T1
T2
S3
24V 10V GND D1
E1
L1
N
230V AC
GND (0V)
10V (OUT)
0-10V ( IN )
EC Motor
Connector
L1
N
T1
T2
S3
10V
GND
E1
L1
N
230V AC
GND (0V)
10V (OUT)
0-10V ( IN )
EC Motor
Connector

Instruction manual WWH-EC and WWH-LT Air heater Page 11/14
Maximum speed only (factory setting):
This can be accomplished with a cable bridge on de motor between [10V] and [E1] or between [T2] and
[S3] on the 6-pole connector. This will cause the fan to run at maximum speed permanently. This bridge
has been connected standard.
With a speed control (potential meter)
A 3-wire speed control (GA3955) or another potential meter can be connected to:
- connectors [10V] [GND] and [E1] in de fan motor
- or to GND[T1], 10V[T2] and 0-10V IN[S3] of the 6-pole connector.
Make sure that the potentiometer has a resistant value of 10kΩ.
0-10V External control
An external 0-10V current can be put:
- on the connectors [GND] and [E1] in the fan motor
- or on GND[T1] and 0-10V IN[S3] on the 6-pole connector
Multiple WWH’s on one control
Eigh WWH’s can be connected to 1 speed control.
The 10V[T2] power supply may only be demanded from 1 WWH, the others should not be connected!
L1
N
T1
T2
S3
230V AC
GND (0V)
10V (OUT)
0-10V ( IN )
Connector
L1
N
T1
T2
S3
230V AC
GND (0V)
10V (OUT)
0-10V ( IN )
Connector Speed regulator 10kΩ
L1
N
T1
T2
S3
230V AC
GND (0V)
0-10V ( IN )
WCU 3
L1
N
T1
T2
S3
230V AC
GND (0V)
0-10V ( IN )
WCU 2
L1
N
T1
T2
S3
230V AC
GND (0V)
10V (OUT)
0-10V ( IN )
WCU 1 Speed regulator 10kΩ
WWH 2
WWH 3 WWH 1

Instruction manual WWH-EC and WWH-LT Air heater Page 12/14
4.4 Control with zone valve
The zone valve is applied on the WWH when one boiler has to heat several rooms separately. In this
situation the zone-valve will control the hot water boiler and hot water supply to the WWH. Operation in
short can be summarized as follows;
 Heat demand is created through the room thermostat. RT switches 230Volt and powers the zone-
valve, this will switch the boiler on.
 Boiler makes hot water.
 Contact thermostat measures water temperature. If water temperature is higher than the
temperature set, CT will supply power to the WWH. The fan will blow. If a voltage regulator or
external 0-10V signal has been applied, this signal determines the fan speed.
 If the requested temperature has been reached, the RT will open the contact and cut off power
supply to the zone-valve; the boiler will be shut off eventually.
 CT measures a water temperature that is lower than the temperature set and will open the
contact. The fan will stop!

Instruction manual WWH-EC and WWH-LT Air heater Page 13/14
5 Maintenance and operation
Caution:
Make sure that you have turned off the power group that you are working on. The heater must be
earthed.
5.1 Maintenance
Especially in dusty spaces, it’s important to clean the heater regularly. If the heat exchanger is heavily
covered by dust-traps it will not displace the heat sufficiently. Use a vacuum cleaner or compressed air.
Avoid damage to the fins. Clean also the fan and the fan grill
5.2 Safe operation
The heater is controlled by the room thermostat and/or the fan (speed) control. There are no controls on
the heater itself. Depending on the installation, the user can make following settings:
- Control main or isolation switch
- Turn up and down room thermostat
- Turn up and down contact thermostat
- Change fan speed with voltage regulator or externa;0-10V signal
Adjusting direction of the air outlet is normally no user’s action, this is done by the installer.
5.3 Frost damage
ATTENTION: frost damage!
Do not set the room thermostat lower than 5°C. Freezing of the exchanger or the tubes will cause
irrevocable damage to the installation. A constant supply of hot water from the boiler must be ensured.
Frost damage is excluded from warranty claims!

Instruction manual WWH-EC and WWH-LT Air heater Page 14/14
6 Water temperatures/ air volumes
The conversion diagram shows heater capacities in KW under different conditions. These conditions
may be:
- Water temperature, for example 90/70°C (Regime)
- Air temperature sucked by the fan (Air temp)
6.1 WWH-EC capacities at several water temperatures
In situations where other inlet- and return water temperatures are applied, the original (registered)
heater capacity should be multiplied with the value in the table below. The WWH-EC is not classified for
steam applications.
Air
temperatur
e
Water
temperatur
e
0°C
5°C
10°C
15°C
18°C
20°C
90/70°C
1
.
30
1
.
19
1
.
10
1
.
00
0
.
94
0
.
91
80/60°C
1
.
11
1
.
01
0
.
91
0
.
82
0
.
76
0
.
73
70/50°C
0
.
92
0
.
82
0
.
73
0
.
64
0
.
56
0
.
55
60/40°C
0
.
73
0
.
64
0
.
54
0
.
45
0
.
40
0
.
37
50/30°C
0
.
54
0
.
45
0
.
37
0
.
27
0
.
22
0
.
18
6.2 WWH-LT capacities at several water temperatures
In situations where other inlet- and return water temperatures are applied, the registered heater
capacity should be multiplied with the value in the table below. The WWH-LT is not classified for steam
applications.
Air temperature
Water
temperatu
re
0°C
5°C
10°C
15°C
18°C
20°C
45/35°C
1
.
76
1
.
51
1
.
25
1
.
00
0
.
81
0
.
74
50/30°C
1
.
56
1
.
30
1
.
07
0
.
78
0
.
64
0
.
52
60/40°C
2
.
11
1
.
85
1
.
56
1
.
30
1
.
16
1
.
07
70/50°C
2
.
66
2
.
37
2
.
11
1
.
85
1
.
62
1
.
59
6.3 Example
What is the output of a WWH 235-EC with a water supply (regime) of 80/60 °C, in a room with a
environment temperature of 10 °C?
The table in paragraph 2.1 states the power of the WWH 235-EC at a regime of 90/70 degrees and an
environmental temperature of 15°C. This is 27. kW. With a regime of 80/60 degrees and 10 degrees room
temperature, the conversion factor according to the table above in paragraph 9.1 is 0.91.
De capacity will therefore become 0.91x27.8kW = 25.3 kW.