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K
48
1.1 INTRODUCTION
“GG F”
boilers are gas-fired thermal applian-
ces for central heating and domestic hot
water production, designed and manufactu-
red to satisfy the needs of multiple dwelling
and modern plant requirements. They com-
ply with the european directives
90/396/CEE, 89/336/CEE, 73/23/CEE,
92/42/CEE and with the european specifi-
cations EN 297 - EN 483. These appliances
can be fired by natural gas (G20) and LPG
(G30 - G31).
This booklet provides the instructions for
the following boiler models:
–
“GG F 23 - 28 OF”
with electronic igni-
tion and modulation, natural draught.
–
“GG F 23 - 28 BF”
with electronic igni-
tion and modulation, room sealed forced-
draught.
The instructions given in this manual are
provided to ensure proper installation and
perfect operation of the appliance.
1
DESCRIPTION OF THE BOILER
1.2
DIMENSIONS
1.2.1
“GG F 23 - 28 OF” models
D
L
Fig. 1
Fig. 1/a
1.2.2
“GG F 23 - 28 BF” models
CONNECTIONS
R C.H. return
3/4”
M C.H. flow
3/4”
G Gas connection
3/4”
E D.H.W. inlet
1/2”
U D.H.W. outlet
1/2”
DIMENSIONS
23 OF 28 OF
L mm
400
450
D mm
130
150
CONNECTIONS
R C.H. return
3/4”
M C.H. flow
3/4”
G Gas connection
3/4”
E D.H.W. inlet
1/2”
U D.H.W. outlet
1/2”
DIMENSIONS
23 BF
28 BF
L mm
400
450
K mm
180
205