Vaillant ecoTEC plus 937 User Manual

9Operating instructions ecoTEC plus 937
4.3 Start-up
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iFP
1
2
Fig. 4.5 Switching the appliance on
• Use the main switch (1) to switch the appliance on and
off:
I: "ON“
0: “OFF”
When you switch the unit on the display (2) shows the
current heating feed temperature.
To adjust the appliance according to your requirements,
read sections 4.4, and 4.6, which describe the setting
options for hot water supply and heating.
a
Caution!
Risk of damage!
The frost protection and monitoring systems
are only active when the main switch of the
appliance is in the "I” position and it is not
disconnected from the mains power supply.
To ensure that these protection devices remain active,
switch your gas wall boiler on and off using the
controller (see the corresponding operating manual).
Section 4.9 describes how to put your gas wall boiler out
of operation.
4.4 Domestic hot water operation
The boiler can only be used if the heating system has
water in it (see Section 4.2.2).
4.4.1 Setting the hot water temperature
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1
Fig. 4.6 Setting the water temperature
• Switch on the appliance as described in section 4.3.
• Turn the knob (1) for setting the hot water
temperature to the temperature you require.
• In order to increase the temperature turn the knob in
a clockwise direction, and to reduce the temperature
turn the knob in an anticlockwise direction. In doing
this:
- left-hand stop approx. 35 °C
- right-hand stop max. 65 °C
h
Note
This knob is used to set the maximum hot
water temperature. If turning the knob all the
way to the right has no effect on the
temperature then the hot water preparation
system is running at full output for the selected
throughput.
The set value is shown in the display during the setting
process (2).
After approx. 3 seconds the display returns to standard
mode (the current heating flow temperature).
a
Caution!
If you live in an area with hard water, please do
not turn the knob (1) further than the mid-
position (12 o'clock position) to prevent
excessive scale build up.
Operation 4

Vaillant ecoTEC plus 937 Specifications

General

Model	ecoTEC plus 937
Category	Boiler
Type	Combination
Output	37 kW
Dimensions	720x440x338 mm
Mounting	Wall-mounted
ERP Efficiency Rating	A
Fuel Type	Natural Gas
Flow Rate	15.2 l/min
Hot Water Flow Rate	15.2 l/min at 35°C temperature rise
Gas Type	Natural Gas
Warranty	5 years
Efficiency	94%
DHW Output	4.0 - 37.0 kW