5
Alpha InTec² 26E, 30CE and 35CE - Technical Data
2.2 PHYSICAL DATA
2.3 FLUE LENGTHS
A 500 mm or 1000 mm Easy-Flue terminal kit with 90° bend or horizontal terminal is available.
CD 750 mm and 1000 mm flue extensions are available.
Length of Flue Required:-
Rear Flue = wall thickness + 180 mm (includes terminal).
Side Flue = wall thickness + distance between wall and side of boiler + 265 mm (includes terminal)
Vertical Flue = distance from top of boiler side panel to required roof position minus 1000 mm for vertical terminal assembly
Maximum horizontal flue length = 12 m.
Maximum vertical flue length including terminal is 14 m.
Each additional CD 90° Bend is equivalent to 1.3 m of flue length.
Each CD 45° Bend is equivalent to 0.9 m of flue length.
The CD Vertical Flue terminal assembly is equivalent to 1 m of flue length.
Note: For flue lengths over 4.5 m the 'F0' parameter should be changed - See Section 5.4.
Boiler flow and return connections mm
DHW inlet (cold) DHW outlet (hot) connections mm
Gas connection diameter mm
Boiler dimensions Height mm
Width mm
Depth mm
Clearances for servicing Bottom mm
Bottom (with jig) mm
Top (horizontal flue) mm
Top (vertical flue) mm
Sides mm
Front mm
Recommended hole size for flue pipe mm
Recommended hole size for instalation from inside the building mm
Boiler dry lift weight kg
Boiler operating weight (full of water) approx. kg
Max. total flue length Horizontal m
Max. total flue length Vertical m
Flue system diameter mm
22
15
22
712
440
276
150
250
235
150
5
450
110
130
33.4
35.8
12
14
60/100
The boiler is equipped with a variable speed low power consumption pump.
During the DHW mode, the pump always runs at the maximum speed.
During the CH mode, different functioning modes of the pump are available.
AUTO - CONSTANT
ΔT (Default): The pump speed is controlled automatically to keep a constant ΔT between heating flow
and return according to the
ΔT set (default value 15°C). It is possible to adjust the ΔT value in the boiler parameter menu.
Parameter A5 adjusts the
ΔT between 5 and 25°C.
Note: A constant
ΔT may not be achievable depending on the heating system design and size.
AUTO - PROPORTIONAL: If
ΔT = 0°C (parameter A5), the pump speed is controlled automatically in order to give a proportional
pump head, the pump speed varies based on the heat output supplied by the burner - the greater the heat output the higher the
pump speed. It is possible to adjust the pump speed range in the boiler parameter menu. Parameter A3 adjusts the maximum
speed between values 5 to 9 and parameter A4 the minimum between 5 and the maximum setting (A3).
FIXED - If parameters 'A3' and 'A4' are set to the same value, the pump runs at the constant speed level set.
Note: For correct operation of the boiler, do not set values lower than the minimum value indicated above (i.e. lower than 5).
Pump release - After a prolonged period of inactivity, the pump might stick, and it may be necessary to turn the motor shaft
using a screwdriver. Take great care during this operation to avoid damage to the motor.
By-pass Regulation (part. 24 Fig. 1-30) - The boiler leaves the factory with the by-pass open.
If necessary, the by-pass can be adjusted to the system requirements from minimum (by-pass closed) to maximum (by-pass
open). Adjust using a flat head screwdriver, turn clockwise to open the by-pass, and anticlockwise to close.
2.4 PUMP
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