A.O. Smith TWI 35-200, Installation, User And Service Manual

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8.4.2 Hot water connection
Note
Insulate long hot water pipes to prevent unnecessary energy loss.
Install the hot water connection:
1.
Install a stop valve (11) in the hot water outlet pipe for service reasons.
2. If applicable, install a temperature gauge (12).
3. Install a T&P valve (3).
8.4.3 Circulation connection
Install a circulation pump when an immediate flow of hot water at draw-off points is
required. This improves comfort and reduces water wastage.
Note
Use the cold water inlet as a connection of the circulation pipe on the water heater.
Note
Make sure that the pump has the correct capacity for the length and resistance of the
circulation system.
Install a circulation pump:
1.
Install a circulation pump (6).
2. Install a non-return valve (5) after the circulation pump to make sure that the
direction of circulation is guaranteed.
3. Install a stop valve (4) before the circulation pump.
4. Install a stop valve (4) after the non-return valve.
5. Connect the circulation pipe.
8.5 Condensate drain
Caution
When the condensate drain is not connected to the waste water discharge by an open
connection, this can cause faults.
Caution
Do not change the condensate drain or cause any blockage in the condensate drain.
Install the condensate drain:
1.
Install a drain pipe to the condense drain (13) for condensate drainage.
2. Make sure that the slope of the drain pipe is 5 mm/m.
3. Connect the drain pipe through an open connection to the waste water discharge.
Note
Always make sure that the condensate drain is filled with water after maintenance
activities and before you turn on the water heater. The condensate drain must be filled
with condensate/water at all times. This will prevent that the flue gasses go through the
condensate drain and will ensure that the water heater functions correctly.
8.6 Gas connection
Caution
Make sure that the gas supply pipe has the correct diameter and length to supply
sufficient capacity to the water heater.
Caution
Make sure that the gas supply pipe is clean. Contamination in the pipe can cause damage
to the gas control valve, during operation.
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40 Installation, Maintenance and Service part