Vaillant ecoTEC plus 937 Instructions For Installation And Servicing

ecoTEC plus 937 installation and maintenance manual32
BUS
— +
24V
7 8 9
230V
L N 3 4 5
X31
X12
Boiler electronics box
Storage tank charging sensor (NTC)
X 1/3 Violet
X 1/1 Black
Pump
X 1/7 Green
X 1/1 Black
X 1/8 red
Storage tank sensor (NTC)
X 1/4 orange
X 1/1 Black
Plug
connection
Aqua-Sensor
Shift load storage tank electronics
X 1/2 brown
X 1/1 Black
X 1/2 Brown
X 1/1 Black
X 1/6 Blue
X 1/1 Black
Inlet sensor SWT (NTC)
X 1/10 Black
X 1/11 Red
X 1/9 Grey
X40 X41
Fig. 4.21 Wiring diagram shift load storage tank
4 Sequence of operations during installation

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