Sector S10UNV - Technical Specification and Important Installation Points; Important Installation Points

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Please read and understand these instructions prior to installing your Sector unvented
water heater. Particular attention should be paid to the section headed IMPORTANT
INSTALLATION POINTS. Following installation and commissioning the operation of
the heater should be explained to the customer and these instructions left with them for
future reference.
TECHNICAL SPECIFICATION
Electrical rating .................................................... 2.0kW @ 230V
............................................................................. 2.2kW @ 240V
Capacities ............................................................. 10 or 15 litres
Weight (full) ......................................................... 10 litre - 15.9 kg
............................................................................. 15 litre - 23.1 kg
Rated pressure ..................................................... 6 bar (0.6 MPa)
Minimum recommended supply pressure ............ 0.8 bar (0.08 MPa)
Pressure Relief Valve ............................................ 6 bar (0.6 MPa)
1.0 IMPORTANT INSTALLATION POINTS
1.1 This unvented water heater MUST be fitted with the Pressure (Expansion) Relief
Valve supplied. This MUST be fitted to the cold water supply near the heater.
FAILURE TO PROVIDE ADEQUATE PRESSURE RELIEF WILL INVALIDATE
ANY GUARANTEE AND LEAD TO A DANGEROUS INSTALLATION
1.2 Expansion can take place within the cold water supply provided that both:
(a) Backflow in the main is not prevented by any stopvalve with loose jumper, check
valve, pressure reducing valve or similar.
(b) Hot water expansion does not enter a branch to a cold water outlet
(see Figure 1 for expansion pipe lengths).
N.B. Both of the above conditions must be met. Additionally, expansion within the
cold water supply will not be possible if the static supply pressure exceeds 4.1 bar
(60p.s.i.).
1.3 If any of the conditions in 1.2 cannot be met, expansion must be accomodated
using an Expansion Vessel. To ensure that all expansion takes place in the vessel a
Non Return Valve must also be fitted together with a Pressure (Expansion) Relief
Valve (see Figure 2). Use Accessory Pack SPACK ALK05.
1.4 If the static supply pressure exceeds 4.1 bar (60p.s.i.) a Pressure Reducing Valve
must be fitted to the cold main supply. If a Pressure Reducing Valve is used an
Expansion Vessel must also be used. Use accessory pack SPACK ALK04
(see Figure 3).
1.5 Where specifications demand the fitting of a Temperature/Pressure Relief Valve, one
can be fitted on site (see Figure 4). Use Accessory Pack SPACK ALK06. Note the
fitting of SPACK ALK06 does not alter the requirements detailed in points
1.1 to 1.4.