Heatrae Sadia B3 M Guía

B3/C3 M RANGE

Installation and User Instructions

for the

B3/C3 M Range

Wall Mounted Vented Water

Heaters

HEAHEA

HEATRAE SADIATRAE SADIA

TRAE SADIATRAE SADIA

TRAE SADIA

The quality name in water heating

Please read and understand these instructions before starting

work.

Please leave this leaflet with the user following installation

36 00 5722 Issue 1

Please read and understand these instructions prior to installing your B3M or C3M

vented water heater. Particular attention should be paid to the section headed

IMPORTANT INSTALLATION POINTS. Following installation and commission-

ing the operation of the heater should be explained to the customer and these instruc-

tions left with them for future reference.

TECHNICAL SPECIFICATIONS

Electrical rating ................................................... 2.75/3.0kW 230/240V

Capacities ............................................................ B3M - 30 litres

............................................................................. C3M - 50 litres

Weight (full) ........................................................ B3M - 42.5kg

............................................................................. C3M - 69.3kg

Rated pressure (Open Outlet) .............................. 0 bar

Rated pressure (Max. head pressure Cistern Fed)

............................................................................. 2 bar (20 metres)

Minimum recommended supply pressure ........... 0.4 bar (4 metres)

COMPONENT CHECK LIST

Before commencing installation check that all the following components have

been supplied in the Installation Kit.

zOpen Outlet Spout

zInlet Valve

zWhite 1/2” x 15mm Push Fit Spout Adaptor

zWhite 15mm Push Fit Cap

zWhite 15mm x 22mm Push Fit Straight Connector

zWall mounting bracket set

zSelf adhesive Levelling Feet (2 off)

zMoulded plastic Spacer

1.0 IMPORTANT INSTALLATION POINTS

1.1 The B3M and C3M vented water heaters are designed to be wall mounted.

Ideally they should be mounted close to where hot water is required most fre-

quently. Pipe runs should be kept to a minimum.

1.2 The B3M or C3M can be installed either as an Open Outlet or Cistern Fed type

unit when used with the appropriate fittings.

1.3 Install only as an OPEN OUTLET or CISTERN FED unit, failure to do so

will invalidate any guarantee and may lead to a dangerous installation.

B3/C3 M RANGE

2.0 INSTALLATION - GENERAL REQUIREMENTS:

2.1 National Wiring rules may contain restrictions concerning the

installation of these units in bathrooms.

2.2 The unit should be vertically wall mounted using the wall bracket

and levelling feet provided (see Section 3.0 INSTALLATION -

WALL MOUNTING). The inlet and outlet water connections must

always be to the bottom of the unit.

Diagram 1 Dimensions

1.4 OPEN OUTLET INSTALLATION

When installed as an Open Outlet water heater the outlet acts as

a vent and must not be connected to any form of tap or fitting

not recommended by Heatrae Sadia.

Only one outlet can be served via an Open Outlet type tapset.

1.5 CISTERN FED INSTALLATION

When installed as a Cistern Fed water heater the cold water

supply must be from a feed cistern complying with Water

Byelaw 30.

A vent pipe must be connected to the outlet of the heater. The

vent pipe must rise continuously and be arranged to discharge

into the cold water feed cistern.

The vent pipe must have a minimum bore of 19mm.

More than one conventional tap can be supplied.

C3 MB3 MDim e n s io n

888616A

937665B

977705C

778506D

3.0 INSTALLATION - WALL MOUNTING

3.1 Using Diagram 1 and the Dimensions Table as a guide mark the position of the

wall mounting bracket and lower location point. Drill and plug the wall with

suitable fixings, fix the wall bracket to the wall.

3.2 Fit the heater wall bracket to the rear of the unit using the screws provided

ensuring the central location bolt is pointing towards the bottom of the unit.

3.3 Remove the backing paper from the self adhesive pads of the Levelling Feet and

affix them to the lower back of the unit in the approximate positions shown on

Diagram 2.

Diagram 2 Bracket and Levelling Feet

Positions

2.3 Enough space should be left below and at the top above the unit for pipe connec-

tions. Refer to Diagram 1 and the Dimensions Table to determine a suitable

position for the heater.

2.4 NOTE: Ensure that the wall can support the full weight of the unit (see TECHNI-

CAL SPECIFICATIONS) and that there are no hidden services (electricity, gas,

or water) below the surface of the wall.

2.5 DO NOT install where the unit may freeze.

2.6 Refer to the section IMPORTANT INSTALLATION POINTS to determine which

valves and accessories are required.

2.7 The water connections are 15mm diameter copper tubes suitable for compression

fittings. Do not use solder joints as this will damage the heater.

2.8 The INLET is marked BLUE, the OUTLET is marked RED. It is recommended

that a WBS Listed isolating valve be fitted on the cold water supply to the heater.

2.9 Plumbers Paste must not be used as it can impair the operation of components.

B3/C3 M RANGE

Diagram 3 Typical Open

Outlet installation

4.0 INSTALLATION - OPEN OUTLET

4.1 When installed as an Open Outlet water heater the outlet acts as

a vent and must not be connected to any form of tap or fitting

not recommended by Heatrae Sadia.

4.2 Only one outlet can be served. The fittings supplied include an Inlet

Tap, 300mm Open Outlet Spout, a 15mm x 1/2” straight Push Fit

connector and a 15mm Push Fit cap. The heater should be sited so

that the spout can discharge into a suitable sink or basin.

4.3 Streamline option packs J, K, M, P, Q, R or S can be used in place

of the spout to provide a single tap outlet. Flow rates will be at a

reduced rate. Note: item 4.7

4.4 The cold water supply may be taken from the cold water mains or

from a cold water feed cistern complying with Water Byelaw 30

with a minimum recommended pressure of 0.4 bar (4 metres head).

A drain cock should be incorporated in the supply to facilitate

draining the heater for maintenance.

4.5 The inlet tap should be fitted to the INLET pipe of the heater. The

inlet must not be connected directly to the cold water mains

supply. The Outlet Spout should be fitted to the OUTLET pipe

using the 15mm x 1/2” straight push fit connector supplied in the

fittings kit.

3.4 Hang the unit on the wall mounting bracket ensuring the location

bolt locates in the hole in the wall bracket. Position the moulded

spacer block between the tab on the bottom cover moulding and the

wall. Insert a No. 10 x 2 1/2”long screw through the tab and spacer

block and tighten into wall plug.

Diagram 4 Typical Cistern Fed installation

5.0 INSTALLATION - CISTERN FED (LOW PRESSURE)

5.1 This method of installation must be used if the outlet is to be connected to one or

more conventional taps. It is not recommended for supplying a shower. Indi-

vidual site demands should be considered when choosing the number of outlets to

be served.

5.2 A vent pipe must be connected to the outlet connection of the heater.

The vent pipe must have a minimum internal diameter of 19mm.

The vent pipe must be unobstructed, rise continuously and be arranged to

discharge over the cold water feed cistern.

DO NOT connect any pressure relief device to the vent pipe of this water

heater.

4.6 The 15mm Push Fit Cap, with tamperproof collet, must be fitted to the Vent Pipe

on the top of the heater.

4.7 In an Open Outlet installation it is normal for the spout to drip during heating.

This is due to expansion of water as it is heated within the unit, it does not

indicate a fault. DO NOT attempt to stop this dripping by over-tightening the

inlet tap as damage to the sealing washers or internal operating mechanism will

occur.

B3/C3 M RANGE

Wiring Diagram

5.3 The cold water supply must be from a cold water feed cistern

complying with Water Byelaw 30. The maximum head pressure

must not exceed 20 metres.

5.4 It is recommended that a WBS Listed isolating valve is fitted on the

cold water supply to the heater. A drain cock should be fitted on the

inlet pipe to the heater at a level lower than the unit to allow

draining for maintenance.

5.5 The inlet must not be connected directly to the cold water mains

supply.

5.6 The Vent Pipe should be connected to the top of the heater using the

15 x 22mm Push Fit Straight Connector supplied.

6.0 INSTALLATION -

ELECTRICAL REQUIREMENTS

WARNING: This appliance must be earthed. It is suitable for a.c.

supply only. Disconnect the electrical supply before removing the

terminal cover. Installation must be in accordance with the current

I.E.E. Wiring Regulations.

6.1 The unit is supplied fitted with a 1.0m 3 core 1.5mm2flexible cable.

The electricity supply should be fused 13 Amp for a 3kW model

and be via a double pole isolating switch with a contact separation

of at least 3mm in both poles. Refer to the schematic wiring dia-

gram below.

6.2 The wires are colour coded as follows:

Green and Yellow EARTH ( )

Brown LIVE (L)

Blue NEUTRAL (N)

7.0 COMMISSIONING

7.1 Do not switch on the electrical supply until the unit has been filled with water

and checked for leaks.

7.2 Check that all installation and electrical requirements have been met.

7.3 Check that all water and electrical connections are tight.

7.4 Open a hot water tap, if fitted, and turn on cold water supply to the heater.

7.5 Allow unit to fill and leave hot outlet to run for a short while to purge any air and

flush out the pipework. Close the hot tap and check the system for leaks.

7.6 Switch on the electrical supply. The indicator light will illuminate during

heating. When the set temperature is reached the indicator light will go out.

7.7 The set temperature can be adjusted by rotating the knob located in the terminal

cover. It is possible to lock the thermostat knob in either the mid-range or a “hot”

position by following the procedures in 7.9 or 7.10 below. Always switch off the

electrical supply before removing the terminal cover.

7.8 Setting the “mid-range” position:

Rotate the thermostat knob to the mid position. Remove the terminal cover by

using a large flat bladed screwdriver to depress the four snap lugs located in the

four rectangular depressions around the cover. Holding the thermostat knob in

position turn the terminal cover over and remove the backing disc from the

underside of the cover. Turn the backing disc over and refit to the knob ensuring

the notch locates with the boss on the underside of the cover. Refit the terminal

cover, the thermostat will now be locked in the “mid-range” position.

7.9 Setting the “hot” position:

Rotate the thermostat knob to mid way through the hot graduated range (red

graphic). Follow the procedure detailed above, however in this case the knob

should be held in the “hot” position previously set. When the terminal cover has

been refitted the thermostat will be locked in the “hot” position.

8.0 MAINTENANCE - DESCALING

Little maintenance is required, however in hard water areas the unit will require

periodic descaling to ensure efficient operation. To descale the unit:

8.1 Switch off and disconnect the electrical supply. Turn off the water supply to the

unit.

8.2 Open a hot tap, if fitted, to relieve any system pressure. Empty unit by opening

the drain cock in the inlet pipework.

8.3 Remove the terminal cover by using a large flat bladed screwdriver to depress the

4 snap lugs located in the 4 rectangular depressions on the bottom cover.

B3/C3 M RANGE

9.0 SPARE PARTS

The following comprehensive list of spare parts is available for your

B3M or C3M water heater. Please refer to the Rating Label on the side

of your heater before ordering to ensure the correct spare part is ob-

tained.

DO NOT REPLACE WITH PARTS NOT RECOMMENDED BY

HEATRAE SADIA - THIS WILL INVALIDATE YOUR GUARAN-

TEE AND MAY RENDER THE INSTALLATION DANGEROUS.

DESCRIPTION CODE NO.

Element plate assembly - 30/50 litre 3kW .......... 95 606 926

Thermostat........................................................... 95 612 667

Thermal cut-out ................................................... 95 612 666

Indicator light ...................................................... 95 607 995

Element plate gasket ........................................... 95 611 811

Terminal cover c/w thermostat knob .................. 95 614 184

15mm Push Fit Cap Nut...................................... 95 607 996

Spout and adaptor ............................................... 95 604 212

8.4 Disconnect the electrical terminations to the element. Disconnect

earth links to the earthing stud. Withdraw the thermostat and

thermal cut-out capillary tubes from the pocket on the element plate.

8.5 Remove the element plate assembly by unscrewing the five securing

screws, a tapped jacking hole is provided (NOTE: a quantity of

water may still be present in the container, it is recommended that a

container be placed under the unit to collect any spillage). Remove

any loose scale from the container. Carefully clean off any scale

from the element and thermostat pocket. DO NOT clean scale from

interior container walls.

8.6 Re-assemble the element plate assembly fitting a new sealing

gasket. Rewire the unit with reference to the Wiring Diagram.

8.7 Re-commission the unit following the INSTALLATION and

COMMISSIONING instructions.

ACTIONPOSSIBLE CAUSESFAULT

1. Check electrical supply1. Electrical supply faultWater not heating

h/hl

necessary replace

thermostat operation. If

operated reset and check

2. Check cut-out, if2. Thermal cut-out tripped

necessary

operation, replace if

3. Check thermostat3. Thermostat fault

replace.

resistance. If faulty

con tinuity and ins ulation

4. Check element for circuit4. Element fault

supply is on.

1. Check mains water

turned on

1. Cold water supply not

o water flow - General

2. Check for obstructions.

supply

2. Blockage in cold water

connections to tapset

1. Check water

correctly installed

1. Open Outlet tapset not

Outlet installations

o water flow - Open

2. Check for obstructions.2. Blockage in tapset

1. Check for obstructions.1. Blockage in tapset

Fed ins tallations

o water flow - Cis tern

float valve.

Check operation of cistern

cistern tank is turned on.

2. Check water supply to2. Cistern tank empty

float valve.

Check operation of cistern

equal to outlet flow rate.

and that inlet flow rate is

cistern tank is turned on

1. Check water supply to

as outlet flow rate

1. Cistern not filling as fast

ins tallation s

reduces - Cistern Fed

Water flow gradually

necessary.

obstructions, clear as

2. Check vent pipe for2. Vent pipe blockage

NOTE: Use only Heatrae Sadia approved spare parts. Replacement of any parts with

components not recommended by Heatrae Sadia will invalidate the guarantee and

may render the installation dangerous.

10.0 FAULT FINDING

Disconnect the electrical supply before removing the terminal cover. It is recom-

mended that any service operations on the B3M or C3M heaters are carried out by a

competent person.

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