Chappee NXR3 Installation Manual page 6

Sludge flush
Fig. 4
DIAGRAM OF THE ELEMENTS
S
S
Front
Fig. 5
Boiler
ref.
34
35
36
37
38
39
Ref. : CH - 1249 - A - 2
Non return valve
To vents
S : tightening markings
E : spacing pads
E
S S
Number of sections
Front Middle
1
1
1
1
1
1
Minimum flow rate must be provided at all times,
whatever the rate of operation, either :
- by means of the main flow pump, provided that the
system has no mixing valve between each boiler and
the pump, and that the pump operates continuously,
- by means of a recycling pump or a loading pump
operating permanently.
In the case of a recycling pump or a loading pump per
boiler, and to avoid parasitic flows in the other boilers,
position non return valves upstream from the return
connection.
The burner must be controlled by the recycling or
loading pump. It can only be put in operation if the pump
operates. Secondarily, a flow control device, combined
with the TH thermostat, can be mounted on the return
of the boiler, downstream from the recycling or loading
pump.
S
Middle
Rear
2 1
3 1
4 1
5 1
6 1
7 1
6
Assembly marking
Cord junction point
S
Cord
Distributors
None
None
Short
Short
Long
Long
Rear