Gas Connection - A.O. Smith ADMR - 40 Installation, User And Service Manual

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3.7.4
3.7.5
3.8

Gas connection

Instruction manual ADMR
Drain valve
1. Fit the standard drain valve (9) supplied with the appliance.
2. If applicable, fit a circulation pipe (3.6.5 "Circulation pipe").
If not, fit the blind threaded plug and gasket (C) supplied with the drain valve,
as shown in the figure.
C
IMD-0122 R1
Circulation pipe
See (C) in the installation diagram (3.5 "Installation diagram").
If an immediate flow of hot water is required at draw-off points, a circulation
pump can be installed. This improves comfort and reduces water wastage.
1. Fit a circulation pump (6) of the correct capacity for the length and resistance
of the circulation system.
2. Fit a non-return valve (5) behind the circulation pump to guarantee the
direction of circulation.
3. Fit two stop valves for service purposes (4).
4. Connect the circulation pipe to the T-piece at the drain valve (9) as shown in
the drain valve figure (3.6.4 "Drain valve").
Warning
The installation should be carried out by an authorised installation engineer,
in compliance with general and local regulations (1.3 "Regulations").
Caution
Make sure that the diameter and length of the gas supply pipe are large
enough to supply sufficient capacity to the appliance.
See (D) in the installation diagram (3.5 "Installation diagram").
1. Fit a manual gas valve (10) in the gas supply pipe.
2. Blow the gas pipe clean before use.
3. Close the manual gas valve.
4. Fit the gas supply pipe to the gas control.
Warning
After fitting, check for leaks.
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