Range Senator RFB006 6kW Installation And User Instructions Manual - page 8
8
SEALED SYSTEMS
Where used in sealed (pressurised) system, the system kit should be mounted in the return pipework behind the pump, see fig 4 (page 9). Use
standard calculations for an 82
o
c flow temperature when sizing the vessel. Max system pressure: 0.35Mpa/3.5 bar. Always mount the vessel in a
vertical upright position. Do not install a valve or other restrictive device between the boiler and the safety pressure relief valve.
THERMOSTATIC CONTROL
The installations must include a room thermostat providing full boiler interlock. Where the boiler is installed in a space heating only mode, a full
programmer providing independent control of hot water and space heating in conjunction with a room thermostat will normally be used.
Thermostatic radiator valves may be used on all radiators other than those in the room where the room thermostat control is situated.
CLEANSING / INHIBITOR
After installation the system must first be flushed out in accordance with BS7593:1992 before adding inhibitor. Fermox Superfloc or Betz Dearborn
Sentinel X300 or X400 are recommended for both new and existing systems. After flushing, the correct dosage of inhibitor must be added. Fernox
Superconcentrate or MB1 or Betz Dearborn Sentinel X100 can be used in most water areas, however consult manufacturer’s instructions and local
water conditions before use. Check inhibitor concentration after installation and annually to ensure correct protection. Failure to flush correctly or
inadequate inhibitor will invalidate the warranty.
MULTIPLE BOILER INSTALLATIONS
For multiple boiler installations (up to three number) mount each boiler side by side with a minimum gap of 50mm between each boiler casing.
Connect the pipework in parallel as fig 7 (page 11). Connect flows via swept tees together increasing pipework sizes from each tee to ensure full flow
through the system. EG. for 3 x 12kW boilers use a 22mm flow and horizontal pipe to the tee of the second boiler increasing to 28mm to the third
boiler increasing again to 35mm pipework for the system loop. Each pipe drop to the boiler flow connection is 22mm. Repeat the exercise for the
return connections.
Only connect to the boiler in 22mm Table X Copper Tube. Do not use plastics. Install the pump in the 35mm return pipework and size according to
overall system requirements ensuring sufficient flow to each boiler i.e. for 3 x 12 kW boiler require 3 x 12 litre per minute minimum flow = 36 LPM.