Baxi Solo 3 30 PF Installation And Servicing Instructions page 31

Thermostat Sensor
Flow Pipe
Fig. 76
Yellow Leads
Fig. 77
Overheat
Thermostat
Orange Leads
Cable Tie
Fig. 78
5.0 Installation
5.19 Water Connections
1. The boiler has two side water connections, the
top connection being FLOW and the bottom
connection being RETURN (Fig. 75a).
2. It is essential that FLOW and RETURN pipes
are connected to the correct fittings.
3. The top flow connection incorporates the boiler
thermostat and overheat thermostat (Fig. 76).
4. A copper elbow, compression nut and olive are
provided in the kit for the return connection.
Fig. 75a
NOTE: Drain cocks should be fitted to all the
system's low points.
5. Take the boiler thermostat assembly and the
overheat thermostat and clip from the kit.
• Clip the boiler thermostat to the flow pipe
adjacent to the elbow.
• Engage the overheat thermostat in the clip and
fit to the flow pipe next to the boiler thermostat.
• Take the cable tie from the kit and use it to secure
the overheat thermostat clip. The cable tie must be
fitted diagonally so that it sits at both sides of the
ribs on the clip.
• Connect the electrical tags to the thermostats.
The overheat thermostat has the larger terminals.
• The thermostats have no polarity - either tag can go
on either terminal.
• Ensure that the area of the flow pipe to which
the thermostats are fitted is free of excess
solder and debris.
5.20 Pipe Routes
1. Ensure that any pipework is routed so as to
leave the boiler via the spaces at the rear of the
outer case, either at the top or at the bottom.
2. Pipes may be dropped down within the outer
case in the spaces between the back plate and the
combustion box.
NOTE: It is important that the pipework does
not interfere with the correct fitting of the outer
case and a space of 14mm clearance must be
left between any vertical pipes and the outer
sides of the back plate.
5.21 Gas Connection
1. Connection to the gas supply is RC
BSPT internal) located at the rear of the gas cock
(Fig. 78).
2. When connecting the gas feed pipe, the control
box may be pulled forward to give greater access.
/ ( / in
1 1
2 2
31