Chappee NXR3 Installation And Maintenance Manual page 18

4 . 3 Lower savers
T
he two optional extra optimizing baffles should be
placed in the two lower "flue-ways" as shown in figure 21:
Engage each baffle in the "flue-way".
Performance as shown in the characteristics table corres-
pond to the boiler operating with the upper and lower baffles
as shown in the position diagram opposite.
4 . 4 Control panel options
Before any operation inside the control panel, disconnect
power supply using main switch located on heating system
general control board.
Flue gas thermometer :
I
ts housing is to be positioned on the control panel front
and the bulb on the flue stack.
- Take off the top, open panel front
- Take off the factory-mounted blank plate and engage the
capillary and the thermometer housing into the front aper-
ture
- Guide the capillary through control panel rear and casing
front top, parallel to the other installed capillaries. Direct
the capillary towards the back of the boiler, on exchanger
insulating blanket, in order to be able to bring its bulb up
into the connection pipe between flue hood and stack
- Drill, preferably vertically, the fluegas duct to + 7.5 and
drive the bulb holding clip (see fig. 22)
- Engage the bulb into the clip. Close the control panel and
fit top again.
Burner cables :
T
he 1st stage burner cable with a 7-contact connector
and the 2nd stage burner with a 4-contact connector are to be
connected on the terminal block inside "S" control panel,
markings being properly aligned. guide the wires as explained
in the ñ of page 16.
Réf. : CI - 405 - A
Upper baffles
Fig. 21
Bulb
Holding
clips
Flue
stack
Ø 7,5
Fig. 22
18
Lower baffles