8
remeha Gas 3c
7.1 General
The boiler is suitable for operating at a maximum working
pressure of 6 bar and a minimum pressure of 0.8 bar.
Boiler can be installated in open or closed systems.
7.2 Boiler assembly
Broag provides special tools on loan, for the boiler as-
sembly with detailed building instructions. However, buil-
ding supervision and/or actual boiler erection services
can be provided by Broag or an approved boiler erection
engineer.
7.3 Water connections
The boiler water connections can be fitted on either side
of the boiler.
The water connection is flanged on the boiler with a pipe
connection for welding Ø 70 mm to the installation.
The top blind-flange has an integral cast 1" tapping to
accept a safety valve. The end sections have a
3
/
4
"
tapping to accept drain/off cocks (Tapping BSP).
7.4 Pocket for instrument panel
The pocket should be fitted in the top front end section of
the boiler and at that side of the boiler where the gas train
is fitted. Other end section tapping 1" should be sealed.
7.5 Water pressure
Each section is hydraulically tested to at least 12 bar.
Maximum test pressure for the assembled boiler block is
6 bar.
Operating pressure between 0.8 bar and 6 bar.
7. ASSEMBLY AND INSTALLATION GUIDELINES
6.3 Standard electronic gas train On/Off or High/Low
6.3.1 Schematic construction
6.3.2 Specification
1 Gas multibloc (5-12 sections)
2 Safety shut-off valves (13-17 sections)
1 Gas governor (13-17 sections)
1 Pilot gas valve
1 Pilot gas governor
1 Ignition transformer 5 kV
1 Pilot burner with flame detector
1 Down draught thermostat set at 70˚C
6.3.3 Control panel on gas train
1 Main switch
1 Control box Satronic
1 Fuse, brusk
1 Signal lamp
6.4 Functions
6.4.1 Flame protection
Flame protection by means of ionisation flame detection.
6.4.2 Down draught thermostat
The boiler is fitted with a down draught thermostat
Honeywell (typ L6068A).
If there is down draught the thermostat will switch off the
boiler. Fixed setpoint is 70
°
C.
6.4.3 Thermostats
Control thermostat On/Off Landis & Gyr 35
°
-95
°
C.
Control thermostat High/Low Landis & Gyr 35
°
-95
°
C
(High/Low version only).
High-limit thermostat locks out at 110
°
C.
Fig. 06 5-12 sections
Fig. 07 13-17 sections
Legend
A
Gas cock
PB
Pilot burner
DR
Gas governor
F
Gas filter
HB
Main gas burners
MB
Gas multibloc
IT
Ignition transformer
PGV Pilot gas valve
MP
Measuring point
SSV Safety shut-off valve
FD
Flame detector
- - - - Not supplied
