Product specifications

Central heating system cold fill valve
Use the filler loop provided with the Robokit expansion vessel. Connect this according to the instructions
between the cold supply and the heating system. Ensure that the double check valve is connected to the heating
side. One of the connections on the 4-way connector manifold supplied with the Robokit can be used for the
filler loop connection. If this connection is not used it needs to be blanked off. The flexible filling loop hose
must be disconnected at one end once the system is filled.
Hot water expansion vessel
The 5 ltr hot water expansion vessel has a ¾” BSPM connection and is also supplied with a wall mounting
bracket. This expansion vessel must be connected to the UV3 manifold. Use the connection point on the UV3
manifold opposite the pressure relief valve connection point. See fig 4. Fit a 15mm street elbow to this
connection point and then connect to the hot water expansion vessel via 15mm copper pipe or use a flexible
hose. Under no circumstances must an isolating valve be fitted between the expansion vessel and the circuit
which it serves.
Condensate discharge
The Multi boiler comes complete with a condensate trap. Two different traps are supplied. The condensate trap
supplied with your boiler can be either grey or white.
The 32mm
grey condensate trap
needs to be fitted on the condensate outlet on the boiler. Ensure that the trap is
pushed fully home (some lubricant will assist). Take the white 32mm compression connector (item 3 in fig 2)
and remove the nut, ring and olive from one end. Discard the olive and ring. Fit the white ring over the female
end of the black elbow supplied with the trap. Push the elbow on to the trap outlet. Then screw the white
compression connector on to the elbow. See figures 9 and 10. The 32mm waste pipe can then be connected and
run to the selected drainage outlet. (Note: the trap connection is a different size to a standard UK 32mm pipe)
Remove elbow from
condensate trap and
slide on 1.1/4” nut.
Throw away rubber seal.
Locate elbow over inner
connection and tighten
nut.
Fig 10
Fig 9
ATMOS MULTI Mk 2 version 2008
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