Salamander Pumps CT Force, Руководство по установке, Страница: 9 / 17

14 15
Pump hunting protection
In negative head systems all the discharge pipework after the pump is pressurized.
In such systems there exists the possibility the pump will hunt ON-OFF-ON etc at intervals.
This will happen:
• if all outlets are not fully closed
• if there is a leak at a connection
• if boosted toilets are not fitted with equilibrium ball valves
• or as residual hot water contracts in long pipe runs.
Stored hot water volume
In calculating the volume of the stored hot water requirement it is important to consider:
• number of bathrooms, with particular attention to the size of the bath
• number of persons in household
Stored hot water temperature
Extract from BS5546:2010
“The mean temperature of the stored water should not normally exceed 60ºC and in a
combined central heating and domestic hot water system it is recommended that the stored
water temperature is controlled independently from that on the primary circuit”.
Effective control of stored hot water is simply achieved by use of a cylinder thermostat or
direct acting thermostatic valve (e.g. tapstat).
Maximum water temperature for CT Xtra, CT Bathroom & CT FORCE pumps is 65ºC.
In systems where the stored hot water temperature cannot be controlled e.g. Aga solid fuel
appliance or very crudely by the boiler thermostat, a Salamander approved HWS TMV must
be used.
Approved flanges (cylinders)
The 22mm No Stop Essex and the other
approved top entry flanges with extension
pipes into the cylinder represent the best
known means of ensuring minimal aeration
of the hot supply water to the pump.
Please contact PumpWise on 0191 516
2002 for additional approved flanges.
Warix flange (fig 14)
A) The vent connection MUST
be from side in Warix flange.
B) The supply connection to the
pump MUST BE FROM THE TOP
of the Warix flange.
C) In systems where there are one
bathroom and an en-suite shower,
or two or more bathrooms, the cold
feed to the cylinder MUST be in
28mm pipework.
Water hammer protection
Water hammer most commonly occurs in systems where there are long pipe runs supplying
solenoid activated appliances e.g. washing machines or outlets with quick acting/turn taps/
valve(s). The harmful effect of water hammer shock waves can be cushioned by fitting
a pressure vessel unit, into the supply pipework as close as possible to the outlet from which
the shock waves are originating.
MAX
65˚C
A
B
C
Usable capacity
minimum 50 gallons
per bathroom
Never less than
1.2m for any
top entry flange
Warix flange
Unpumped
outlets
Washing machine
Pressure vessel
Figure 14: Approved flanges
Figure 15: Water hammer protection
*
*Vent and expansion pipe to terminate to current standards