Dual exposed shower with fixed and adjustable shower heads installation instuctions page 5
Important information
Combination boiler/multipoint system
The Dual product is suitable for use with combination boiler systems. The combination boiler MUST have a minimum rating of
24kW (80,000 Btu) and be of the type fitted with a fully modulating gas valve. This is sufficient to operate one outlet point at
a time.
If in any doubt, please contact the appliance manufacturer before installation commences.
The cold supply can be taken from the nearest convenient mains supply and the hot supply can be taken from the nearest hot
water draw-off point. Account must be taken of the pressure drops that will occur when other draw-off points are used while the
shower is in use.
Balanced high-pressure system
The cold water supply must be drawn from the same mains supply as that to the hot water system (down stream of the cylinder
manufacturers pressure limiting valve, where supplied) and the hot supply from the nearest convenient draw off point. Account
must be taken of pressure drops that may occur when other draw-off points are used while the shower is in use.
Boosted gravity fed hot and cold supplies
Services must be installed according to good plumbing practice having regard to pipe sizing, long pipe runs and low-head
situations.
Pump installation
PLEASE REFER TO THE MANUFACTURERS PUMP INSTALLATION GUIDE FOR PUMP INSTALLATION INFORMATION.
UNDER NO CIRCUMSTANCES MUST A PUMP BE FITTED DIRECTLY TO THE WATER MAIN.
A pump must only be used to boost the pressure from tank-fed supplies.
A minimum 1 bar twin ended booster pump may be fitted with the Dual mixer shower, but for improved performance,
we recommend a twin ended booster pump larger than 1 bar is used.
Stored water capacities
The minimum capacity of the cold storage cistern should not be less than 225 litres (50 gallons). The capacity of the hot cylinder
must be capable of meeting the anticipated demand.
CYLINDER TEMPERATURE IN EXCESS OF 65ºC MAY RESULT IN POOR SHOWER PERFORMANCE.
To minimise pressure loss we recommend that the hot and cold supplies are run in 22mm as close as reasonably possible to the
mixing valve before reducing to 15mm to suit the intended inlet connection fittings.
Siting
With boosted gravity fed systems, please ensure the minimum gravity flow rate is sufficient to operate the pump flow switches.
PLEASE REFER TO THE MANUFACTURERS PUMP INSTALLATION GUIDE FOR PUMP INSTALLATION INFORMATION.
To Next Page
Loading...
