Unvented Water Connections - A.O. Smith BFC-28 Installation, User And Service Manual

3
3.6 Unvented water
connections
3.6.1
3.6.2
3.6.3
3.6.4
26
Installation
Warning
The installation should be carried out by a competent person, in compliance
with general and locally applicable regulations (1.3 "Regulations").
Cold water side
See (A) in the installation diagram (3.5 "Installation diagram").
1. Fit an approved stop valve (4) on the cold water side as required by the
applicable regulations (1.3 "Regulations").
2. The maximum working pressure of the water heater is 8 bar. Because the
pressure in the water pipe at times can exceed 8 bar, you must fit an
approved pressure-reducing valve (1).
3. Fit a non-return valve (5) and an expansion vessel (16).
4. Fit an expansion valve (15) and connect the overflow side to an open waste
water pipe.
Hot water side
See (B) in the installation diagram (3.5 "Installation diagram").
Note
Insulating long hot water pipes prevents unnecessary energy loss.
1. Optional: fit a temperature gauge (12) so you can check the temperature of
the tap water.
2. Fit the T&P valve (3).
3. Fit a stop valve (11) in the hot water outlet pipe for servicing.
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) after the circulation pump to guarantee the
direction of circulation.
3. Fit two stop valves for servicing (4).
4. Connect the circulation pipe according to the installation
diagram (3.5 "Installation diagram").
Condensation drain
1. Fit a sloping waste water pipe to the condens trap (13) for condensation
drainage and connect this via an open connection to the waste water
discharge.
Caution
If the condensation drain is not fitted to the waste water discharge using an
open connection, this can cause faults.
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Instruction manual BFC