Vaillant ecoTEC plus 937 Instructions For Installation And Servicing

ecoTEC plus 937 installation and maintenance manual6
2 Unit description, data and
dimensions
2.1 Technical data
Name
ecoTEC plus 937
Combination unit Unit
Nominal heat output range of central heating
80 °C Feed/60 °C Return
60 °C Feed/40 °C Return
50 °C Feed/30 °C Return
40 °C Feed/30 °C Return
12.0 - 28.0
12.3 - 28.9
12.7 - 29.7
12.9 - 30.3
kW
kW
kW
kW
Maximum output DHW
37 kW
Maximum heating output
28 kW
Minimum output
12 kW
Category
II2H3P
SEDBUK Band
A
SAP Seasonal Efficiency
91.5 %
Required gas flow pressure (G20, Natural Gas)
20 mbar
Required gas flow pressure (G31, Propane)
37 mbar
Connection value (if necessary referred to storage tank charging/hot water preparation) at
15 °C and 1013 mbar
G20: 4.0
G31 : 2.94
G20 :m
3
/h
G31 : kg/h
Exhaust mass flow
at minimum thermal load (40 °C Feed/30 °C Return)
at maximum thermal load (80 °C Feed/60 °C Return)
5.7
17.1
g/s
g/s
Exhaust temperature
at minimum thermal load (40 °C Feed/30 °C Return)
at maximum thermal load (80 °C Feed/60 °C Return)
40
70
°C
°C
NOx class 5
Protection class IP X4D
Max. flow temperature 85 °C
Adjustable flow temperature (default setting: max. 75 °C) 30 - 85 °C
Permissible total excess pressure central heating 3.0 bar
Volume of water circulating (ΔT =20 K) 1204 l/h
Approximating condensation water volume at 50 °C Feed/30 °C Return 2.9 l/hr
Pump head 250 mbar
Minimum water flow < 0.1 l/min
Specific throughflow in 10 min (ΔT = 30 K) 204 l/10min
Permissible excess pressure water side 10 bar
Required connection pressure for max. throughflow quantity 1.3 bar
Required connection pressure for min. throughflow quantity 0.1 bar
Hot water temperature discharge 35 - 65 °C
Flue size (concentric) 60/100 mm
Flue approval category C
13
, C
33
, C
43
, C
53
, C
83
, B
23
, B
33
Pre-pressure 10 l expansion vessel 0.75 bar
Connections for heating flow and return 22 mm
Gas connection 22 mm
Diameter of the drain line for the safety valve heating (min.) 15 mm
Diameter of the drain line for the safety valve hot water (min.) 15 mm
Condensate drain (min. internal diameter drain) 19 mm
Dimensions (H x W x D) 720 x 440 x 597 mm
Primary water quantity 2.5 l
Supply voltage 230/50 V ~/Hz
Main PCB fuse (slow-blow) for main power supply 2 A
Electr. Power consumption 175 W
Standby power consumption 6.5 W
Shift load power store capacity 15 l
Installation weight, just storage tank 17 kg
Installation weight, just combi unit 38 kg
Operating weight (with water) 62 kg
Table 2.1 Technical Data ecoTEC plus 937
2 Unit description, data and dimensions

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