A.O. Smith CAWH 8-455-12, 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.
Note
The use of a T&P valve is mandatory.
Install the hot water connection:
1.
Install a stop valve (11) in the hot water outlet pipe for service reasons.
2. Install a T&P valve (3).
3. If applicable, install a temperature gauge (12).
8.4.3 Condensate drain connection
Because of the condensate discharge, it is recommended to place the appliance on a fire-
resistant base of +/- 100 mm.
• Condensate discharge must be connected to the sewage system.
• Use flexible PVC pipe or tubing to connect the condensate drain (13) to a suitable
drain.
• Do not connect condensate drain lines with other drain or discharge lines into a
single (common) pipe or line.
• Slope the condensate drain lines toward the inside floor drain.
8.4.4 Circulation connection
Install a circulation system when an immediate flow of hot water at draw-off points is
required. This improves comfort and reduces water wastage.
Note
Connect the circulation pipe (C) to the cold water inlet connection.
Note
Make sure that the circulation 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 (C) to the cold water inlet, between the water heater
and the expansion vessel (16).
8.5 Electrical connections
Warning
Leave the water heater electrically isolated until you are ready to commission it.
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44 Installation, Maintenance and Service part
EN