BEM5000 User Guide.PDF

OPERATING PRINCIPLE

BEM 5000

USER GUIDE

BEM 5000 co-ordinates the operation of Central Heating and Hot Water systems.

Using outside air temperature BEM 5000 automatically adjusts the temperature of the water flowing to

the radiators, matching as closely as possible available heat as generated by the boiler to that required

by the house. This process ensures that the boiler only runs when it is absolutely necessary. This feature

is known as "Weather Compensation".

During periods of Hot Water demand the weather compensation is temporarily overridden, and water at

the boiler thermostat setting will flow to both Heating and Hot Water circuits. As soon as the Hot Water

tank is at the required temperature, the unit will revert to its energy saving mode.

During operation, the pump will on many occasions continue to run for some time after the boiler has

turned off, this is intended and adds significantly to the efficiency of the system.

During "Saving" periods, heat can be added to the system by temporarily turning the compensator OFF

using the front panel switch.

BEM 5000

BOILER ENERGY MANAGER

Danfoss Randall can accept no responsibilty for possible errors in catalogues, brochures and other printed material. Danfoss

Randall reserves the right to alter its products without notice. This also applies to products already on order provided that such

alterations can be made without subsequent changes being necessary in specifications already agreed.

Danfoss Randall Ltd

Ampthill Road

Bedford, MK42 9ER

Tel: (01234) 364621 Fax: (01234) 219705

Email: danfossrandall@danfoss.com

Website: www.danfoss-randall.co.uk

Part No.5121 Issue 5 06/99

BEM 5000 SETTING AND INDICATORS

USER GUIDE

Your installer will have adjusted your BEM 5000 controller as far as possible in the conditions and time

available (normally 10 for standard boiler, and 5 for condensing boiler).

To obtain the very maximum efficiency we recommend that you re-adjust it during cold, frosty conditions

after which no further adjustments will be necessary regardless of weather changes.

HEATING INDICATOR

Lit when heating is programmed

ON and room thermostat is calling

for heat (if fitted)

With the heating on, the building warm, a full tank of hot water and the water supply hot:

Ensure that the boiler thermostat is set to maximum and left there.

Turn the radiator thermostats, and if fitted the room thermostat, to maximum.

WATER INDICATOR

Lit when water is programmed ON

and Hot Water Cylinder

Thermostat is calling for heat

SAVINGS INDICATOR

Lit when BEM 5000 has turned

off boiler to prevent unneccesary

heat input into building

Allow half an hour or so for the room temperature to stabilize.

The temperature should be slightly warmer than desirable (23-24°C if you are aiming for 21°C).

If this is the case go to step 6 below. If not then you need to adjust the Response Rate. The dial

is marked in divisions.

The setting should be increased to raise the room temperature or reduced to lower it. Make only

small changes - no more than one division at a time.

When you have made an adjustment, carry on again from step 3 above.

The BEM 5000 is now set. Room temperature adjustments should, from now on, be made by

means of the radiator thermostats, or if fitted, the room thermostat.

Should a higher room temperature be required for a short period, simply turn the compensator

switch to the OFF position. This turns off the savings function, boosting the flow temperature to

that of the boiler thermostat. Remember to return this switch to the ON position after this short

period.

COMPENSATOR SWITCH

Leave in ON position. Turn to OFF only

if weather compensator needs to be

overriden, to boost heating for short

periods.

COMPENSATOR INDICATOR

Lit when rocker switch is set in the ON

position and where outside temperature

controls the water temperature flowing to

the radiators

RESPONSE RATE ADJUSTOR

Increase setting if house is consistantly

under-heated, reduce setting if over-

heated

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