Mikrofill 3 Technical Documentation Manual

PRESSURISA TIO N U NIT

MIKROFILL 3 PRESSURISATION UNIT

TECHNICAL DOCUMENTATION

ISSUE 12/15 Rev. 01

INSP I R E D E FFI C IENC Y

TABLE OF CONTENTS

TECHNICAL DOCUMENTATION 03

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

Technical Data

Electrical Details
Connection Details
Installation
Mains / Boosted Cold Water Supply
Fill Pressure
Connection to the System
Drain
Dimensions
Diagram of a Typical Installation
Wall Mounting Plate Dimensions for Fixing

Electrical Connections

Electrical Diagram
Electrical Data

Keypad Functions

System Data
Up
Power
Down
Service Mode

Status Display

Pressure Correct
System Filling
Filling Stopped due to Low Mains Water Pressure
Frequent Use

Service Mode

Adjusting Settings

Parameter Functions

Fault Diagnosis

Status / Fault Conditions
Status / Fault Conditions continued.

Manual Override

Component List

Maintenance

Removing the Controls Assembly
Cleaning the Solenoid Valves
Cleaning the Inlet Ballofix Valve

Declaration of Conformity

04

05

06

07

08

09

10

10

11

12

13

14

14

15

16

17

18

TECHNICAL DATA

04 TECHNICAL DOCUMENTATION

WRAS Approval Number:

ELECTRICAL DETAILS

• Supply Voltage:

• Full Load Current:

• Start Current:

• Fuse Rating:

• Maximum Load BMS Relays:

CONNECTION DETAILS

• Cold Water Inlet:

• System Outlet:

• Drain (via Tundish):

• Maximum Inlet Pressure:

• Maximum Cold Fill Pressure:

•Nominal Flow Rate:

•Dry Weight:

1806078

230 Volt

1 Amp

1 Amp

3 Amp

5 Amp

15mm Compression

15mm Compression

¾” BSP

5 Bar

4.7 Bar

14 l/min at 2 Bar

5 kg

TECHNICAL DATA

TECHNICAL DOCUMENTATION 05

The Mikrofill 3 is a fully automatic sealed system filling device and is suitable for the water management in
domestic and commercial heating and cooling systems. It is designed for use in a normal environment. It is not

suitable for installation outside, or in environments where there are excessively cold temperatures.

INSTALLATION

All Mikrofill products should be installed by a competent person with regard to the relevant requirements of
the Health and Safety Regulations, Building Regulations, IEE Regulations, Water Supply (Water Fittings)
Regulations, Water By-laws (Scotland) and any other by-laws or planning requirements.

The Mikrofill 3 is WRAS approved with certificate number 1806078.

It is intended for wall mounting (see page 08) and should be mounted at such a height as to enable the
display to be easily read.

MAINS / BOOSTED COLD WATER SUPPLY

The Mikrofill 3 is designed to be connected directly to the mains cold water supply, or a boosted cold water
supply. The unit is supplied complete with all necessary isolating valves and incorporates a basket filter in the
inlet ballofix valve.

A flexible hose is supplied with the unit which MUST be connected to
the inlet ballofix valve, as shown in the diagram to the left. Failure to
do so may result in damage to the inlet pressure sensor due to water
hammer, resulting in a SENSOR FAILURE. Under such circumstances,
this would not be considered a warranty fault.

The water inlet connection is 15mm compression and should be
connected to the mains cold water supply by 15mm copper pipe or
equivalent approved plastic pipework.

If the Mikrofill 3 is sited some distance from the mains cold water
supply it may be advisable to install a single check valve adjacent to
the mains cold water supply.

To reduce the pressure drop on very long supply routes 22mm supply
pipework is recommended.

FILL PRESSURE

The Mikrofill 3 is capable of filling a system to within 0.3 bar of its
current inlet water pressure.

Where the incoming water pressure exceeds 5 bar please contact
our technical department on 03452 60 60 20 for further installation
information.

FLEXIBLE
HOSE

TECHNICAL DATA

06 TECHNICAL DOCUMENTATION

CONNECTION TO THE SYSTEM

The Mikrofill 3 is connected to the system by way of the 15mm outlet isolation valve. The pipework from the unit
should be made in 15mm copper or similarly approved plastic pipework. A suitable sized expansion vessel
should be incorporated into the system at this point (please refer to the typical installation diagram on page
07 for more information).

Please contact our technical department on 03452 60 60 20 if you require any assistance regarding vessel
sizing.

The final connection into the system should be sized accordingly, recommendations are shown below:

• Vessel size up to ½”

• Vessel size up to ¾”

• Vessel size up to 1”

For vessel sizes in excess of 1000L capacity please contact our technical department.

IMPORTANT NOTE:

DRAIN

Following every fill procedure the unit will discharge a small amount of water, establishing an air break. For this,
the unit is supplied fitted with a ¾” BSP tundish, which must be connected to a suitable drain.

Mikrofill Systems Ltd. cannot accept responsibility for any consequential damage caused by failure to
connect the tundish to a suitable drain.

100L:
300L:

1000L:

(15mm) expansion pipework
(22mm) expansion pipework
(28mm) expansion pipework

The expansion vessel air / nitrogen charge must be set to the same pressure as the cold fill
pressure of the system.

If the installed height of the expansion vessel is different to that of the unit then please
contact our technical department who will advise on the air / nitrogen charge required.

A suitably sized pressure relief / safety valve MUST be fitted on all sealed systems.