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Maintenance
Installation and Maintenance Instructions
The performance of the Heatguard UFH blending valve should be
checked on an annual basis and verified against the original installation
performance. If the water or installation conditions are more severe this
check should be carried out more frequently.
If water conditions or installation conditions are severe and the valve is
sluggish in operation, it is possible that there is a build up of scale or
debris within the valve, it can then be stripped down and cleaned very
easily:
1. Isolate the hot flow and cold return supplies and remove the valve
from the installation. Make note of the orientation of the parts as they
are removed so that they can be re-assembled in the correct manner.
Single Room UFH Control Pack
2. To clean the internals of the main valve body, first remove the cap
using an allen key, then remove the plastic locking ring, then finally
carefully remove the valve headwork by unscrewing the large hex nut.
3. Slide the piston and thermostat assembly out of the valve body and
clean all internal surfaces and ‘O’ rings with clean running water.
4. Using a WRAS approved silicone based waterproof grease, lightly
lubricate the ‘O’ ring in the body and the external surface of the piston.
5. After cleaning, re-assemble the Heatguard UFH blending valve. Re-set
and test the valve.
Reliance Worldwide Corporation (UK) Ltd
Worcester Road,
Evesham,
Worcester,
WR11 4RA,
UK
Tel: +44 (0)1386 712 400
Fax: +44 (0)1895 712 401
www.rwc.co.uk
Reliance Worldwide Corporation (UK) Ltd reserves the right to make changes to the
product which may affect the accuracy of information contained in this leaflet.
ZINS980352_003_02-17
Designed for use on small rooms or extensions, provides
temperature controlled mixed water to underfloor heating
systems with a heat output of up to 3kW, satisfying underfloor
heating areas upto 40 sqm.
Reliance Worldwide Corporation (UK) Ltd
Temperature Settings
Reliance Worldwide Corporation (UK) Ltd are part of the Australian based
group of companies collectively known as Reliance Worldwide Corporation,
with the UK brand known as Reliance Water Controls.
The thermostatic blending valve has a temperature setting range
between 35°C & 60°C as indicated on the temperature adjustment
cap. Initial setting of the thermostatic blending valve (after the heat
up/screed drying period) should provide the following flow
temperatures.
Screeded floors40-45°C
Timber floors55-60°C
Reliance Worldwide Corporation (UK) Ltd is a specialist in the design,
distribution and technical support for temperature and flow controls.
With group offices and manufacturing plants throughout the world RWC
offers a wealth of knowledge and expertise which is reflected throughout
our products. Being part of many specialised trade associations and having
our own UKAS accredited laboratory, makes us at the forefront of any new
regulations or changes which impact the industry, and allows for continuous
product development and innovation, within our specialised product area.
Single Room UFH Control Pack
UFH control pack for providing temperature controlled mixed water in
signle room applications to an underfloor heating system with a heat
output up to 3Kw. The pump is pre-wired in conjunction with a flow
temperature thermostat and mains connection cable and has
provision to connect a room stat. The unit has integral ball valves for
connecting/isolating the primary heating system, an adjustable
thermostatic blending valve and an 'A' rated 6 meter circulating pump
all secured to a fixing bracket with anti-vibration mountings for silent
operation. G½” tappings are provided for use with any adaptors to
connect the unit to the under floor heating loop or manifolds.
These initial settings can then be adjusted to provide comfort. A
maximum floor surface temperature of 29°C should not be exceeded
(bar wet areas such as bathrooms, 35°C) as this will lead to feelings
of discomfort. With timber floor finishes including strip laminate
products the maximum floor temperature of 27°C should not be
exceeded as this may result in excessive material shrinkage.
Adjusting the temperature
Please ensure that the commissioning of the valve is done under
normal operating conditions. The Heatguard UFH blending valve is
supplied factory set at 43˚C. To alter this setting between 35-60°C
proceed as follows:
1. Remove the screw which secures the cap by using the allen key
provided then lift the cap off.
2.With both the hot and cold supplies turned fully on and the terminal
fitting open, adjust the temperature to the required setting, by using
the cap to turn the adjustment spindle.
•
Compact bolt on unit providing quick and simple installation
•
Provides mixed temperature water to underfloor heating systems
with a heat output up to 3Kw
•
Easy set up with adjustable temperature range
4. A digital hand-held thermometer should be used to measure the
outlet temperature correctly.
•
Controls flow temperatures to +/- 2°C even with fluctuating
temperature and flow from the boiler
5. Once the correct temperature has been set re-fit the cap, ensuring
it is secured through the slots on the locking ring so that the valve
cannot be adjusted by the end user.
1
3.Turn the cap clockwise to decrease or anti-clockwise to increase
the temperature.
6
5
Pump
Mains
Flow Temperature Stat
42°C close (Pump on) (Fused spur)
3 Amp
31°C open (Pump off)
N
L
E
• Pre-assembled Single room control pack.
Including thermostatic mixing valve, 'A' rated 6 metre pump,
service valves and bracket
N
L
SF L2
Junction Box (Example)
10
L
N
E
Boiler (Example)
9
8
7
6
• Screw fixing kit
For spares or any technical enquiries, please contact the Reliance
Technical Department on (01386) 712 400.
Operating Principle
The blending valve will maintain the temperature of the heating loop
by continually blending the flow from the boiler with the cooler return
flow from the loop.
2
1
• Installation instructions
When the primary heating circuit is on and the heating water
temperature has reached approximately 43°C and the room
thermostat is calling for heat, the pump will switch on and feed the
underfloor heating loops.
3
4
5
Grey
Orange
AUX
Switch
Motor
• Pump instructions
L
L
N
N E
E
E
Single Room
Pack
Please check contents of pack before beginning installation.
SF
Programmable Room Stat (Example)
Zone Valve (Example)
Brown
Blue
Single Room Pack Circuit Diagram with Zone Valve
Pack Contents
The heat output can be adjusted with the control knob on the
blending valve to suit different floor structure and comfort levels.
The room thermostat will switch the pump off when selected room
temperature is reached.
When the primary heating is off and the room stat is calling for heat,
the pump will continue to run until the heating loop temperature falls
to approximately 30°C before switching off the pump.
2
Installation
Wiring
The Single room UFH control pack is designed for wall fixing and
ideally should be mounted in a horizontal position with the electrical
connection box uppermost. However, it can also be mounted vertical
to pump up or down if desired. Provision should be made to vent air
to protect pump from cavitation. The unit must not be floor mounted
or in any position that inclines the pump shaft vertical. Refer to the
pump installation leaflet enclosed.
All wiring should be undertaken by a qualified installer and conform to
IEE regulations. To comply with IEE regulations the pump on the unit
is provided with an earth connection via the connection box. A fused
spur should be provided adjacent to the unit. The mains cable should
be connected to the spur and fused at 3 amps.
Choose the location for the unit ensuring adequate clearance and
accessibility for pipe work and any subsequent maintenance. This
is particularly important if enclosed within a cupboard space for
example.
Locate the unit on the wall and mark the hole fixing positions through
the bracket. Take care to protect any electrical equipment and cables
during handling.
If fitting a room thermostat, fix in a position on the wall as
recommended in the manufacturers instructions. If a room thermostat
is fitted, remove the link between the terminals as indicated on the
wiring diagram.
WIRING DIAGRAM - RELIANCE COMPACT UFH UNIT
Room stat (example) - not supplied
SF
L
N
E
Remove link
if room stat
is fitted
SF L2
Remove the unit and drill (8mm masonry drill) and plug the holes.
Align and secure the unit to the wall with the screws provided. The
unit is now ready for connecting to the primary heating supply and
underfloor heating loops. If appropriate the unit can be connected to
the underfloor heating loop(s), filled and pressurised via the integral
ball valves and then locked off for floor screeding before making the
boiler connection.
3
L
N E
E
N Pump
L
L
N
E
Mains
Flow Temperature Stat
42°C close (Pump on) (Fused spur)
3 Amp
31°C open (Pump off)
4
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