John Mills BS7291 Screeds, Pipe Layout in Solid Floor Installations, Single Room Control Unit

SPEEDFIT SYSTEM COMPONENTS

SINGLE ROOM CONTROL UNIT
	PART		DESCRIPTION	PACK
	NO.			QTY
	JGROOMPACK	SINGLE ROOM CONTROL UNIT		1

The new Speedfit Underfloor Heating Control Unit is the ideal way to provide heating to a conservatory or room extension, up to 30m2.

The unit is pre-assembled and pre-wired to allow for a fast and simple installation.

The control unit has integral ball valves to allow for isolation from the primary heating system, an adjustable blending valve and a 6 metre head circulation pump. An anti-vibration mounting bracket ensures silent operation.

Speedfit push in connections make for a fast connection to pipework.

Speedfit recommend connection to the main central heating flow and return distribution system, but it is also possible to connect to the nearest radiator supply pipe.

A full and detailed installation guide is provided with each unit.

The Speedfit Underfloor Heating Control Unit is suitable for use when:

•The boiler serving the existing heating system has

the capacity to take the extra output from 2KW to 3KW

•The boiler is compatible with the additional pump

•The maximum area to be heated is 30 sq metres

The Control Unit is designed to be used with Speedfit Barrier Pipe. The amount of pipe needed is determined not only by the size and shape of the room but by the resistance of the floor finish to heat transfer.

The table below shows examples of low resistance (tiles) and high resistance (carpet with underlay) finishes.

COIL SIZE TO AREA				Staples	Max Area	Temp/Tiles	Temp/Carpet	Max Output
Part	Coil Size
No.		(m)	Required		(m2)	(ºC)	(ºC)	(KW)
15BPEX-150C		150		240	20	44	58	1.8
15BPEX-120C		120		200	17	44	58	1.5
15BPEX-100C		100		170	14	44	58	1.2
15BPEX-50C		50		100	7	44	58	0.6

SINGLE ROOM UNDERFLOOR HEATING PACK

PART	DESCRIPTION	PACK
NO.		QTY

JGUFHPACK20	UNDERFLOOR HEATING PACK	1
For conservatories or room extensions up to 20m2.

Pack contains: • Single Room Control Unit

•Programmable Room Thermostat

•15mm x 150m coil Polybutylene Pipe with Pipe Clips and Pipe Inserts

SINGLE ROOM UNDERFLOOR HEATING PACK

PART	DESCRIPTION	PACK
NO.		QTY

JGUFHPACK30	UNDERFLOOR HEATING PACK	1
For conservatories or room extensions up to 30m2.

Pack contains: • Single Room Control Unit

•Programmable Room Thermostat

•2 x 15mm x 100m coils of Polybutylene Pipe

•300 x 15mm Pipe Clips

•8 x 15mm Pipe Inserts

•2 x 15mm Speedfit Equal Tees

•2 x 15mm Speedfit Swivel Elbows

INSTALLATION IS QUICK AND EASY

SOLID FLOOR INSTALLATIONS

SCREEDS

The screed is an important and integral part of the UFH system, transferring energy from the pipes to the area to be heated. The response of this ‘thermal mass’ will depend on its depth and make up.

The usual depth of screed is 65 - 75mm thick but it is possible depths can be reduced to assist in improving performance.

PIPE LAYOUT IN SOLID FLOOR INSTALLATIONS

The shape of the room and the position of the outside walls and windows will determine the pattern of the pipe layout. The counterflow pattern is recommended although other options are shown below.

The floor is cleared of dust and debris and insulation is laid across the area.

Speedfit Pipe is laid in a pre-determined pattern and fixed in position with staples.

Fit the Speedfit Manifold to the wall and connect the Pump Pack.

Connect the ends of the pipes to the Manifold.

The system is filled and pressure tested.

The screed should be laid whilst the pipe is pressurised.

TIMBER FLOOR INSTALLATIONS

Spreader plates are available for timber flooring which uses either traditional joists or TJI joists.

Spreader plates 390mm x 1,000mm and 390mm x 250mm are designed for use with traditional joists at 400mm centres. They are laid across the joists and fixed in place using a hand stapler. The 15mm Speedfit Pipe is pushed into the grooves in the plate and the floor decking laid on top.

Insulation can be placed between joists to the underside of the plates either before or after the plates have been laid.

Spreader plates 165mm x 1000mm can be used with either traditional or TJI joists and with the floor already in place. They are fixed to the underside of the floor using staples or screws. The Speedfit Pipe is fixed in to the groove.

When the plates and pipework have been installed, the insulation is placed in the floor void to minimise downward heat loss.

Single Serpentine Double Serpentine

Triple Serpentine Counterflow

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The underfloor heating system should not be used to dry the concrete screed.

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