MHS Boilers Ltd ©
191007
30
Maximum length of straight pipe in m Number of 90 ° pipe
bends
Type
Diameter in mm
2
4
6
WM/45 80
17
14
12
WM/65 80
4
3
1
WM/85
100
16
14
13
WM/100
100
9
7
5
WM/120
100
10
8
6
Table 8 Maximum length of straight pipe
5.3.5 Condensate drain
Condensate water is formed due to the condensation of flue gases, and this has to be drained
from the boiler. Pipe the condensate water directly into the waste water drain system. If there is
no direct connection to the drain system, a water collection tank equipped with pump and level
switch may be used to pump the condensate water into the drain system. (Available as an optional
extra) In view of the acidity, only plastic drainpipes should be used. Fill the bottle trap with water after
installation; the bottle trap beaker on the bottom of the boiler can be easily removed to do so. Ensure
that there is an open connection between the drain system and the boiler bottle trap. It is not
permissible for condensate to be drained into guttering, since the condensate may freeze.
5.4 Hydraulic system
Generic Single Boiler Configuration
5.4.1 Water flow
5.4.1.1 Flow and resistance
The minimum required water circulation through the boiler should be maintained at all times
(equivalent to ∆t 25 K at full load). The minimum required water circulation should not be adversely
affected by the use of valves, non-return valves, systems in which several boilers are connected
to a common distribution pipe, etc. The maximum water flow is achieved at ∆t 15 K.
Summary of Contents for Ultramax WM 100
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