Unvented Water Connections - Lochinvar CHA 100 G CE Installation, Commissioning, User & Maintenance Instructions

is
3.6.5
3.7 Unvented water
connections
3.7.1
3.7.2
3.7.3
Instruction manual CHA
Circulation pipe
See (C) in the 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 piping to the T-piece on the drain valve (9) as per the
drain valve diagram (3.6.4 "Drain
Warning
The installation should be carried out by a competent person, in compliance
with general and locally applicable regulations
Cold water side
See (A) in the installation diagram
1. Fit an approved stop valve (4) on the cold water side as required by the
applicable regulations (1.3
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.
Shunt pipe
You can connect a top to bottom circulation pump to prevent stacking of the
water in the water heater.
1. Optional: Depending on the draw-off pattern, fit a shunt pipe (Ø 22 mm), a
stop valve (11) and a top-to-bottom circulation pump (7).
2. Fit a non-return valve (5).
3. Fit a stop valve (11).
Hot water side
See (B) in the installation diagram
Comment
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.
(3.5 "Installation diagram").
valve").
(1.3 "Regulations").
(3.5 "Installation diagram").
"Regulations").
(3.5 "Installation diagram").
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