Water Connection; Condensate Waste Connection - MHG Heating 15 Instructions For Installing, Servicing And Using

Procon

9.0 Water Connection

The Procon 15, 25, 45 & 75 boilers MUST only be installed on a sealed, pressurized heating system. The maxi-
mum working pressure of the boiler is 3 bar.
A safety valve set at 3.0 bar MUST be installed into the heating fl ow pipe adjacent to the appliance and
before any isolation valves. It is recommended that the fi nal working pressure (hot) of the system should not
exceed 2.5 bar.
The system that the boiler is installed onto will require an expansion vessel. The Procon 15 and 25 models
include an integral 10-litre expansion vessel.
Please contact RVR Sales Department for advice on the sizing of an expansion vessel suitable for the systems
requirements.
The fl ow and return connections should include isolation valves, a drain facility, and a suitable method of
disconnection between the isolation valves and the appliance.
The fl ow and return connections on the 75 model are 1¼"BSP M (parallel), therefore it is recommended that a fi tting
with a tapered thread, such as a Tapered Union or Tapered Socket, be utilized for the connection onto the boiler.
22 mm
Heating
Flow
Fig 9.0a – Models 15, 25 & 45 Illustrated

10.0 Condensate Waste Connection

The condensate waste connection is located at the bottom of the appliance, see fi gs 10.0a & 10.0b.
The condense syphon cleaning point is factory fi tted with a heavy black plastic cap which MUST NOT BE
REMOVED apart from during routine maintenance when the syphon is cleaned and must be in place whenever
the appliance is in operation.
WARNING: operating the appliance with the cap removed will result in products of combustion being dis-
charged from the cleaning point.
The condensate waste connection is a ¾"BSP Male threaded stub fabricated from plastic. The installer
must connect to the stub, a condensate waste pipe fabricated from plastic tube & fi ttings (¾" or 22 mm
fl ow pipe is considered suitable). Copper Tube is not acceptable.
The condense waste pipe must fall continuously from the appliance to a nearby foul water drain suitable for
accepting condense waste. If any part of the condensate waste pipe is to be run external to the building or is
at risk of freezing, then the pipe must be suitably insulated to protect against freezing.
If a suitable drain for accepting condense waste is not available nearby and below the boiler, (e.g. boiler
installed in a basement), then a suitable condense sump receptacle with a discharge pump should be installed
below the boiler to remove the condense waste to a suitable remote foul water drain. Available as an optional
extra, Contact RVR Sales Department for more information.
When making the connection to the condense waste pipe, do not use adhesives, it is recommended to
lightly apply a suitable jointing tape (PTFE or similar) and use only light pressure to connect the fi ttings to the
appliance to avoid damage to the condense waste outlet assembly. It is recommended that a suitable method
of disconnection be fi tted, and cleaning points be fi tted at regular intervals.
Condense
Cleaning
Point.
Fig 10.0a – Models 15, 25 & 45 Illustrated
22 mm
Heating
Return
22mm ∅
Plastic
Condense
Outlet.
1 ¼" BSP
Heating
Flow
Fig 9.0b – Models 75 Illustrated
Condense
Cleaning
Point.
Fig 10.0b – Models 75 Illustrated
1 ¼" BSP
Heating
Return
∅ over-
22mm ∅
Plastic
Condense
Outlet.
10