Hyco Superflow SR90 Hoja de especificaciones

Product Instruction Manual

Superow

Unvented Multipoint Water Heater

SR90, SR140

v21.8.1

Overview

Thank you for purchasing a Superow series unvented electric water heater. The Superow

is suitable for hand washing and dishwashing where a number of hot outlets are required

such as kitchens, schools, restaurants, washrooms and oces. The Superow is the ideal

solution for industrial, commercial and light domestic hot water requirements.

Please read and understand these instructions before commencing installation and leave

them with the user when installation is complete.

Please fully read these instructions before commencing installation and follow to ensure

that installation and operation are simple and safe.

Component Checklist

Installation must be undertaken by a competent installer of unvented water

heating systems in accordance with building regulations G3.

Building regulations G3 require a temperature and pressure relief valve to be

factory tted. This must not be removed or blocked in any way.

Installation must comply with the latest edition of the IET wiring regulations.

1. Important Safety Points

2. Installation

The unit must be installed vertically with the temperature and pressure relief

valve at the top.

The heater is not suitable for installation outside.

Do not install the heater where there is any risk of freezing.

The heater is large and heavy, do not attempt to lift alone.

• Plan your installation carefully in advance, allowing suitable space for installation and

future access to all ttings as shown in diagram 1 or 1a, depending on unit capacity.

SUPERFLOW

Hot

Out

Drain

Cock

Drain

(Waste)

Pressure (Expansion)

Relief Valve

Expansion

Vessel

Check

Valve

Pressure &

Temperature

Relief Valve

Tundish

Drain

(Waste)

Tundish

Diagram 1

Installation Diagram 90 L Model

SUPERFLOW

Hot

Out

Drain

Cock

Drain

(Waste)

Pressure &

Tempreature

Relief

Valve

Tundish

Drain

(Waste)

Pressure (Expansion)

Relief Valve

Expansion

Vessel

Check

Valve

Pressure

Reducing

Valve

Cold

Mains In

Drain

(Waste)

Tundish

Diagram 1a

Installation Diagram 140 L Model

Service

Valve

Balanced

O Take

Balanced

O Take

Pressure

Reducing

Valve

Service

Valve

Cold

Mains In

Plumbing Connection

Observe the ow direction arrows on ttings.

It is important that the ordering of the ttings is correct as per the diagram 1 and 2.

Do not remove the factory fitted pressure and temperature relief valve.

Do not insert any other valves between the main manifold and heater inlet as it

may prevent the safe expansion and discharge of water during heating cycles.

• Make the necessary connections, as per diagram 2 on page 6, to the inlet side of the

heater (as indicated by the blue collar).

•It is recommended a service valve (not supplied) is fitted upstream of the installation

in order to facilitate future maintenance.

• It is recommended that the “balanced off take” is used to supply any cold outlet that is

paired to a mixer style tap supplied by the hot feed of the unit.

• The orientation of the expansion vessel is important, it should be fixed firmly to the

supplied bracket in a vertical orientation with the water connection at the bottom

and located so that the length of the connecting pipework is kept to a minimum.

• A drain cock (not supplied) should be fitted to a branch of the incoming supply pipe

at a point that is lower than both the unit and the expansion vessel (see diagram 1 or

1a) in order to allow full drain down for any future maintenance work.

• Make the connection to any hot tap/thermostatic mixing valve from the outlet side of

the heater (as indicated by the red collar).

Discharge Pipe Connection

This product falls within the scope of Building Regulation G3 which stipulates certain

conditions relating to the way any water discharge from relief valves is transported away.

These conditions are designed to ensure that any discharge will not present a hazard

to people or to property and that any discharge is clearly visible so that the underlying

cause is likely to be rectied promptly.

The essential requirement of G3 in relation to water discharge is that the discharge pipe

MUST terminate in a safe, visible position.

In achieving this aim the G3 regulations strongly recommended that:

• The tundish is located within 500mm of the pressure and temperature relief valve

and it is wherever possible oriented vertically. It must be visible to occupants and

positioned away from electrical devices.

• The discharge pipe has a vertical fall of at least 300mm immediately below the

tundish.

Diagram 2

• The discharge pipe below the tundish is at least 22mm diameter (i.e. one size larger

than the pressure and temperature relief valve outlet).

• The discharge pipe should be as straight and as short as is possible and positioned

away from electrical components.

Diagram 3 illustrates an acceptable discharge pipe arrangement. The table below the

diagram species how the maximum acceptable pipe length from the tundish to the

nal outlet depends on the pipe diameter and the number of bends.

For example, in 22mm copper with no bends the pipe could be up to 9m long. With two

bends present the maximum length drops to 9.0m - (2 x 0.80m) = 7.4m.

Safety Device

Tundish

600mm MAXIMUM

Metal Discharge Pipe (D1) from

Temperature Relief to Tundish

Discharge Below

Fixed Grating

300mm MINIMUM

Metal Discharge Pipe (D2) from

Tundish with Continuous Fall

Fixed Grating

Trapped Gully

Diagram 3

Valve outlet size Minimum size of

discharge pipe (D1)

Minimum size of

discharge pipe (D2)

from tundish

Maximum resistance

allowed, expressed

as a length of

straight pipe (i.e. no

elbows or bends)

Resistance created

by each elbow or

bend

G1/2 15 mm 22 mm

28 mm

35 mm

up to 9 m

up to 18 m

up to 27 m

0.8 m

1.0 m

1.4 m

Sizing of D2 copper discharge pipe for common temperature relief valve outlet size.

• The heater is supplied pre-wired with the appropriate cable.

• The electrical installation should conform to the latest edition of the IET wiring

regulations.

• Electrical supply should be capable of isolation via a user-accessible double

isolation switch rated for 13A supply.

Electrical Connection

Diagram 4

3. Commissioning

• Visually conrm all plumbing and electrical connections look sound.

• Open any tap connected to the hot side of the unit and then turn on the incoming

water supply to the heater.

• Allow the unit to ll until water ows smoothly from the open tap for around 1 min

to ensure the tank is purged of air and any plumbing related debris.

• Close the tap and then inspect the system for any leaks.

• Check the pressure and temperature relief valve by twisting the cap to the open

position and observing the ow at the tundish. Ensure the discharge pipe can cope

with this ow continuously for several seconds.

• Release the cap and check that the valve reseals.

• Check the pressure (expansion) relief valve by twisting the cap to the open position

and observing the ow at the tundish. Ensure the discharge pipe can cope with

this ow continuously for several seconds. Release the cap and check that the valve

reseals.

• Turn on the electrical power and turn thermostat knob to the desired setting to

begin heating.

• Whilst the unit heats, the element lamp will illuminate. If it does not then check the

power supply.

• Once the heater reaches the desired setting and the element lamp goes out, visually

check all plumbing connections remained sound and no valves have discharged.

4. Operation

The maximum temperature setting of the heater is 65°C, this can be excessively hot

for some users. In situations where very young children, the elderly or other

vulnerable people are the likely users, then a suitably rated thermostatic mixing

valve should be fitted to the hot water outlets as required.

Never interfere with any of the safety devices.

Beware that very hot water could discharge from the safety valves.

If there is risk of freezing the heater should be left on at least the minimum setting

to prevent potential damage to the product or property from frozen pipes. If the

heater is going to be left unused for a long period of time it should drained.

• Turn the thermostat clockwise to increase the temperature setting.

• Turn the thermostat anticlockwise to decrease the temperature

setting.

• The element lamp will illuminate whilst the unit is heating.

• The element lamp will go off once the temperature set point is

reached.

5. Maintenance

Always disconnect the heater from the power supply before commencing any

maintenance task.

Servicing of electrical components should only be undertaken by competent

individuals.

• To drain the unit, first isolate the power supply and close the nearest service valve

on the upstream of the heater.

• Open the drain cock on the cold inlet and open a hot outlet to enable air to replace

the draining water.

Draining the unit

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