14
Mexico Slimline RS 3/40 & 3/50 -
Installation
INST
ALLA
TION
INSTALLATLON
10 GAS CONNECTION
1.
A MINIMUM working gas
pressure of 20 mbar (8 in.w.g.)
MUST be available at the boiler
inlet, with the boiler operating.
2.
Extend a gas supply pipe NOT
LESS THAN 15mm (
1/2
") OD to
the boiler and connect to the gas
cock situated at the bottom LH
side of the boiler. Attachment to
the gas supply may be either left
or right hand.
3.
Test the gas installation for
soundness and purge in
accordance with BS.6891: 1988.
Refer to Frame 23.
1.
Open vent and cold feed connections must be made to
the boiler flow and return tappings according to the
options shown in Frame 1.
2.
The boiler is assumed to be the highest point of the
circulating system.
3.
The circulating pump is positioned on the FLOW and the
vertical distance, between the pump and feed/ expansion
tank, must comply with the pump manufacturer's
minimum requirements, to avoid cavitation. Should these
conditions not apply, either lower the pump position or
raise the feed/expansion tank above the minimum
requirements of
Caradon Plumbing Limited.
4.
The water velocity through the boiler flow/return pipes is
assumed to be below 1 m/s (3 ft./s), whilst the pump flow
rate is set to provide a temperature difference of 11
o
C (20
o
F)
across the boiler flow/return, at design input.
5.
This information is intended as a GUlDE ONLY and
cannot take into account instantaneous changes in heat
caused by the operation of motorised valves, pumps etc.
Due allowance MUST be made if surging is liable to occur.
If in any doubt, contact
Caradon Plumbing Limited.
12 MINIMUM REQUIREMENTS
Fully pumped systems
11 WATER CONNECTIONS
e.
2 spare blanking off plugs are provided in the
Hardware Pack for use as necessary in the rear flow
or return water connections.
1.
Connect the system flow and return pipework to the
boiler as appropriate. Refer to Frames 12 and 13 for
guidance on system design.
2.
Ensure that all valves are open. Fill and vent the
system and check for water soundness.
Notes.
a.
Isolating valves must be fitted as close to the pump as
possible.
b.
The boiler is not suitable for use with a direct hot water
cylinder.
c.
Gravity connections MUST be at least 28 mm (1").
d.
The front top and bottom plugged connections MUST
NOT BE USED.
