Dimplex SUTP Mid Range Bedienungsanleitung

SUTP Mid Range

Unvented Hot Water Heaters

Installation Manual

30,50 & 75 Litres

Important -This Manual Should Be Left With The Unit After Installation

Table of Contents

1. Introduction.......................................................................................................................................2

2. Component Check List .....................................................................................................................3

3. General requirements........................................................................................................................3

4. Plumbing Installation........................................................................................................................5

7. Electrical installation.........................................................................................................................9

8. Filling and commissioning- ............................................................................................................10

9. Servicing and maintenance. ............................................................................................................11

10. Fault finding..................................................................................................................................12

11. Users instructions..........................................................................................................................13

12. Warranty........................................................................................................................................13

13. Installation, Commissioning and Service Record.........................................................................14

1. Introduction

The “SUTP Mid Range” is a high quality unvented stainless steel domestic hot water cylinder

suitable for domestic hot water systems where the cold mains water supply is between 3bar and 12bar.

Reduced performance is available at lower pressures but the units are not suitable for pressures lower

than 1.5bar and flow rate of 20 litres per minute. The unit comes complete with all the necessary safety

equipment to comply with legislation governing the installation of such systems.

Technical Specification

Model Number SUTP30 SUTP50 SUTP75

Storage capacity (litres) 30 50 75

depth (mm) 400 400 400

width (mm) 400 400 400

Overall height incl t&p valve 665 860 1175

Height excl t&p valve 586 781 1093

Weight when full (kg) 47 71 100

Cold feed/hot draw off connections (mm) 22 22 22

Maximum water supply pressure (bar) 12 12 12

System operating pressure (pre-set) (bar) 333

Expansion vessel charge pressure (bar) 333

Expansion relief valve set pressure (bar) 666

Temperature and pressure relief valve settings:

Lift pressure (bar) 777

Lift temperature (ºC) 90 90 90

Package includes*:

Expansion vessel ltr 555

3bar pressure reducing valve, non return valve, 6 bar expansion relief valve,

tundish •••

T/P valve 7bar 90degC factory fitted

•

15mm to 22mm Tundish

•

Cylinder with 3kW immersion, thermostat, and manual reset thermal cut-out •••

Installation Manual

•

Performance:

Heat up time 15 to 65 ºC (min) 36 55 85

Reheat time for 70% of contents (min) 25 38 60

2. Component Check List

The SUTP water heater comes complete with all necessary safety equipment, please check through the

components supplied and ensure that all parts are present:

a. Water Heater

b. 5 litre Expansion Vessel

c. Pressure reducing valve

d. Expansion relief valve

e. Isolation valve

f. Tundish

g. Expansion vessel bracket

Please contact our customer service department immediately should any part be missing.

3. General requirements

3.1. The “SUTP Mid Range” domestic hot water cylinder MUST be installed by a competent person

in accordance with section G3 of the current Building Regulations.

3.2. Important - It is important that the installer reads and understands these instructions, unpacks and

familiarises themselves with the equipment before commencing the installation. Failure to observe

these installation instructions could invalidate the warranty.

3.3. Water supply – The water supply to the cylinder should be potable water direct from a public

mains water supply with any water treatment equipment functioning correctly.

For optimum performance the unit should be fed via a 15 mm diameter supply pipe direct from the

mains water entry point to the property with supplies between 3bar and 12bar, however, the the unit

can operate with a minimum supply pressure of 1.5 bar and a flow rate of at least 20 litres per minute,

but flow from the outlets will be low if several outlets are used simultaneously. The cylinder control

equipment is factory set to limit the system operating pressure to 3 bar. The maximum supply pressure

into the pressure-reducing valve is 12 bar.

3.4. Taps and fittings -All taps and fittings incorporated in the unvented system should have a rated

operating pressure of 7 bar or above.

3.5. Location – The unit is designed to be vertically wall mounted, indoors, in a frost-free

environment. When choosing a suitable location for the cylinder, consideration should be given to the

routing of the discharge pipe to a convenient point and also the availability of an adequate power

supply for connecting the immersion heater.

The wall onto which the cylinder is mounted should be of good sound masonry construction capable of

holding the weight of the cylinder when full of water (See Technical specifications for weights).

min 300mm

min 100mm

Unit should be mounted on or near external wall

The position of the cylinder should be such that easy access is provided for servicing the controls and

replacing the immersion heater should the need arise.

Pipe runs should be made as short as possible and lagged to prevent heat loss.

To allow for servicing and repairs the unit must be mounted at least 300mm

above any surface or object, so that access can be gained to electric

connectors and the heating element may be removed.

The unit should be mounted close to an external wall so that the discharge

pipe D2 can be routed to a safe visible place.

The tundish should be mounted in a visible location so that it may easily be

inspected.

3.6. Storage and handling – If the cylinder is not being installed immediately, it should remain in its

carton with all pipe end protective caps in situ to prevent damage. We recommend that the cylinder be

transported to its installation position with the outer carton in place.

3.7. Pipework connections –All Pipework connections to the cylinder MUST be made in accordance

with Fig1.

4. Plumbing Installation

4.1. Connections. Connections MUST be made to the cylinder in accordance with Fig 1, and Fig 2.

A drain cock (not supplied) should be fitted in the position shown in Fig 1 to facilitate draining of the

cylinder.

4.2. Cold water supply – For best results, the cylinder should be fed by an uninterrupted 15mm

supply pipe into the pressure reducing valve (PRV) with a supply pressure of between 3 and 12 bar

maximum. The cylinder should not be used on any system with a supply pressure below 1.5 bar and a

flow rate of less than 20 litres per minute.

4.3. Temperature and pressure relief valve – The temperature and pressure relief valve (T&P Valve)

is supplied factory fitted to the cylinder. The T&P Valve must not be removed from the cylinder or

tampered with in any way. The valve is pre calibrated to lift at 7 bar or 90 degrees centigrade and any

attempt to adjust it will invalidate the warranty and could affect the safety performance of the unit.

The outlet of the T&P valve should be routed in 15mm copper piping in a downward direction

alongside the water heating unit to the tundish. The outlet of the expansion relief valve must be T’d

into this pipe before the tundish so that any water exiting either valve can be seen draining through the

tundish– see fig 2

4.4. Pressure Reducing Valve – The pressure relief valve should be installed in the cold water supply

to the water heating unit with the arrow pointing in the direction of water flow as shown in figure 5.

This can be connected to a supply pressure of between 1.5 and 12 bar.

4.5 Expansion Relief Valve this must be installed between the pressure reducing valve and the water

heating unit in accordance with Figure 1. No other valve should be fitted between this valve and the

cylinder. The expansion relief valve contains a non return valve.

4.6. Expansion vessel – A suitable expansion vessel with a pre-charge pressure of 3 bar is supplied for

fitting to all water heating units in the range. The expansion vessel MUST be fitted between the

expansion relief valve and the cylinder. The expansion vessel MUST be positioned with the entry

point at the bottom.

IMPORTANT: Regular checks must be carried out to ensure that the expansion vessel is correctly

pressurised to 3 bar at all times. The expansion vessel should be installed using a standard t-connector

between the expansion relief valve and the cylinder – see Figure 1.

4.7. Tundish – The tundish must not be positioned above or in close proximity of any electrical

current carrying devices or wiring. The installation should conform with the requirements of item 7

below.

4.8 Connection arrangement for SUTP Mid Range Cylinder

Fig 1

1 MAINS COLD WATER SUPPLY (15mm)

2 STOP COCK (NOT SUPPLIED)

3 PRESSURE REDUCING VALVE

4 CHECK VALVE if supplied separately (included in RWC expansion relief valve)

5 EXPANSION RELIEF VALVE - SET 6 BAR

6 DISCHARGE PIPE 22mm DIA (SEE SECTION 7)

7 DRAIN COCK (Not Supplied)

8 TUNDISH

9 EXPANSION VESSEL

4.9. Discharge arrangement.

The Tundish must be installed in a position so that it is clearly visible by the user. In addition, the

discharge pipe from the Tundish should terminate in a safe place where there is no risk to persons in

the vicinity of the discharge, be of metal and:

(a) Be at least one pipe size larger than the normal outlet size of the safety device unless its total

equipment hydraulic resistance exceeds that of a straight pipe 9 m long, i.e. discharge pipes between 9

m and 18 m equivalent resistance length should be at least two sizes larger then the normal outlet size

of the safety device, between 18 m and 27 m at least three sizes larger and so on. Bends must be taken

into account in calculating the flow resistance. Refer to the diagram, tables and worked example

detailed in Fig 2.

(b) Have a vertical section of pipe at least 300 mm long below the Tundish before any elbows or bends

in the Pipework.

(d) Have discharges visible at both Tundish and the final point of discharge, but where this is not

possible or practically difficult, examples of acceptable discharge arrangements are:

-Ideally below a fixed grating and above the water seal in a trapped gully

-Downward discharge at low level, i.e. up to 100 mm above external surfaces such as car

parks, hard standings, grassed areas, etc. are acceptable providing that where children play

or otherwise come into contact with discharges, a wire cage or similar guard is positioned

to prevent contact whilst maintaining visibility.

-Discharge at high level, e.g. into a metal hopper and metal down pipe with the end of the

discharge pipe clearly visible (Tundish visible or not) or onto a roof capable of

withstanding high temperature discharges of water and 3 m from any plastic guttering

system that would collect such discharges (Tundish visible).

-Where a single pipe serves a number of discharges such as in blocks of flats, the number

served should be limited to not more than six systems so that any installation discharging

can be traced reasonably easily. The single common discharge pipe should be at least one

pipe size larger than the largest individual discharge pipe to be connected. If unvented hot

water stored systems are installed where discharges from safety devices may not be

apparent i.e. in dwellings occupied by blind, or disabled people, consideration should be

given to the installation of an electrically operated device to warn when discharge takes

place.

Warning Notice – The discharge will consist of scalding water and steam. Asphalt, roofing felt and

non-metallic rainwater goods may be damaged by such discharges.

Typical discharge pipe arrangement.

Fig 2

Sizing of copper discharge pipe “D2” for common temperature relief valve outlet sizes

Valve outlet Min size of Min size of Max resistance Resistance

size, diameter discharge pipe discharge pipe allowed, expressed created by

(inches) D1 in (mm) D2 from tundish as a length of each elbow

in (mm) straight pipe, i.e. or bend

no elbows or (m)

bends.

22 up to 9 0.8

1/2 15 28 up to 18 1.0

35 up to 27 1.4

___________________________________________________________________________

28 up to 9 ----

3/4 22 35 up to 18 ----

42 up to 27 1.7

35 up to 9 1.4

1 28 42 up to 18 1.7

54 up to 27 2.3

___________________________________________________________________________

Worked example

The example below is for a ½”diameter temperature relief valve with a discharge pipe (D2) having 4

22mm elbows and a length of 7 m from the tundish to the point of discharge.

From

Maximum resistance allowed for a straight length of 22mm copper discharge pipe (D2) from a

½”diameter temperature relief valve is: 9.0 m.

Subtract the resistance for 4 No 22mm elbows at 0.8 m each = 3.2 m.

Therefore, the maximum permitted length equates to: 5.8 m.

5.8 m is less than the actual length of 7 m, therefore, calculate the next largest size.

Maximum resistance allowed for a straight length of 28mm pipe (D2) from a ½”diameter temperature

relief valve equates to: 18 m.

Subtract the resistance for 4 No 28mm elbows at 1.0 each = 4 m.

Therefore the maximum permitted length equates to 14 m.

As the actual length is 7 m, a 28mm diameter copper pipe will be satisfactory.

4.10 Secondary Return

Where required the hot water outlet to the taps may be returned to the cold water inlet of the cylinder

using a circulating pump. The secondary return should be connected as per Figure 3. Note the 5litre

vessel included with the water heater is suitable for pipe lengths of up to 180m. For longer pipe runs

the cylinder should be increased in size accordingly.

Figure 3

7. Electrical installation

WARNING: THIS EQUIPMENT MUST BE EARTHED.

All electrical wiring must be carried out by a competent person and in accordance with the current

I.E.E. Wiring Regulations. All pipework should be earthed!

7.1.The immersion heater - A 3kW 230v 50Hz immersion heater is pre fitted to the cylinder at the

factory. It should be wired in accordance with the instructions given in Fig 4. The cable should be

routed through the strain relief bush.

7.2. Wiring instructions

a) The power supply to the heater must be via a double pole isolator switch or controller, having

contact separation of at least 3 mm, using 1.5mm sq. flexible cable, 85°C rubber insulated HOFR

sheathed, to comply with BS 6141 table 8 and must be fully earthed. Wire the water heater in

accordance with the wiring diagram below:

i. Connect the Earth wire to the terminal on the cylinder marked with the earth symbol.

ii. Connect the Live wire to the high temperature cut-out terminal A1

iii. Connect the Neutral wire to the high temperature cut-out terminal B1

WARNING: DO NOT SWITCH ON THE ELECTRICITY SUPPLY UNTIL INSTRUCTED TO DO SO IN

THE COMMISSIONING PROCEDURE AND THE UNIT IS FULL OF WATER.

Fig 4

WARNING: THIS APPLIANCE MUST BE EARTHED.

8. Filling and commissioning-

8.1. Check that the expansion vessel charge pressure is 3 bar.

8.2. Check that all water and electric connections are tight and correctly configured.

8.3. Open the main stopcock and fill the unit. Open successive hot taps starting with the tap furthest

from the heater. Leave each tap open for a few moments to allow all air and debris from the system to

exit. Close all of the taps.

8.4 Turn off the mains water supply to the cylinder and drain the system through the drain cock.

8.5 Refill the cylinder with hot taps open and close when water flows freely.

8.6 Manually lift (by rotating the knob) both the expansion relief and the temperature and pressure

relief valves for a short period to remove trapped air from behind the valve seating and to prove the

correct function of the discharge arrangement.

8.7. Check all joints for leaks and rectify as necessary.

8.8. With the heater full of water, turn the thermostat to a point just below its mid point setting and

switch on the electricity supply. Check that the cylinder heats the water and the thermostat operates

when the set temperature is reached. Turn on the hot taps to check that warm water is delivered to the

8.9 Check that while the unit is heating up, no water exits from either the expansion relief or the

temperature and pressure relief valve. If water does exit through the valves check the expansion vessel

pressure and installation.

8.10 Increase the temperature to maximum and allow the unit to heat and the temperature to stabilise.

Check that no water discharges from the valves. Turn on the hot taps to drain the heater of hot water.

Set the thermostat to the required temperature and allow the heater to reheat ready for use.

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