Atmos Multi Series - Page 25

Picture for wall frame and
pipework assembly kit
Assembly instructions for
wall frame and pipework
assembly kit
Assembly instructions
using loose components
7. Heating system return connection
Open bag 3.
Fit the 22mm return pipe using the 22mm
compression connector of the filter at the
boiler, and the two unions to the Valve
plate. Remember the washers for both
unions.
Note: If there is no towel rail circuit,
TURN OFF the towel rail return valve fully
as it will not be required. To be absolutely
certain of no future leakage, we
recommend that a 15mm pipe with a
soldered end cap is used to blank off this
port.
TIGHTEN ALL JOINTS WHEN ASSEMBLED
AND DON’T FORGET THE UNION
WASHERS.
The heating flow and return are
connected in 22mm copper to the
boiler connections (flow and return).
The following connections must be
made :-
1) Cold filler loop connection.
2) Safety valve with discharge pipe
3) By-pass valve if mostly
thermostatic valves are used on
the heating system.
4) Towel rail return (if used) must
be the last return connection on
the system.
5) 22mm filter on return pipe
(optional means of protection)
8. Heating system flow pipe
Fit the 22mm flow pipe using the 22mm
compression connector at the boiler, and
the union to the Valve plate. Remember
the washer!
Fit the 22mm by-pass valve between the
flow and return in the correct direction, as
shown in the photo (head to right)
Connect 22mm flow pipe to heating
system.
9. Safety valve discharge system
Take the 15mm safety discharge pipe with
one bend, and connect to the 6 bar cold
water pressure relief valve at the back of
the boiler. Ensure that the pipe is fully
inserted into the valve port, so that the
compression olive grips the pipe.
Take the second discharge pipe (with
tees). Connect as follows;
1) Connect to the cold water discharge
pipe with the 15mm compression
elbow.
2) Connect to the 15mm safety
discharge from the boiler with the
15mm compression straight
connector.
3) Connect to the heating system safety
valve discharge.
4) The black tundish should be pointing
down, and the open part facing
forward for clear visibility.
Fit the 3 bar heating system safety
valve to the heating return pipe near
the boiler, together with a pressure
gauge. The 15mm discharge should be
linked to a 22mm common discharge
pipe connecting the boiler temperature
and pressure relief valves, and the cold
water safety relief valve. The tundish
and safety discharge pipe must be
fitted in accordance with the G3
regulations, as described in the Multi
installation manual.
ATMOS MULTI Mk 2 version 2004
Page 25