Grundfos IMpress User manual

IMpressPressurisation Sets
comprising of
Basic, Advanced, Glycol and H/C.
Installation, Operation and
Maintenance Manual

DECLARATION OF CONFORMITY
We,Grundfos,declareunderoursoleresponsibilitythattheImpress andImpress
Advanced, Glycol and Twin Circuit pressurisationunitsreferencedinthese installation
instructions, to which thisdeclarationrelates,areinconformitywiththe:
Machinery (89/392/EEC), EN292
Electromagnetic Compatibility (89/336/EEC), EN50 081-1 & EN50 082-2
Electrical equipment designed for use within certain voltage limits
(73/29/EEC), EN60 335-1 & EN60 335-2-51
Iffurtherdetailsarerequired,pleasecontactoneoftheGrundfosofficeslistedonthe
back page of these instructions.
1st August 2007
Grundfos Pumps Ltd.
Grovebury Road
Leighton Buzzard
Beds.
LU74TL
GENERAL DATA
These installation, operation and maintenance instructions are given as a guide to
good practice in the installation, putting into service, operation and maintenance of
theGrundfosIMpress andIMpress Advanced, Glycol and H/C units.Theydonot contain
full service instructions,proceduresforthecontinualservice andoperationof the unit.
The servicesofaqualifiedengineershouldbeemployedtomaintainandrepairthe module.
ThisI.O.M.manualmayrefertocomponents/functionsnotfittedtoallunits.
DELIVERY AND HANDLING
Onarrival,inspect theunit(s) forsignsofdamagebeforesigningthedeliverynoteand
report any damage to the supplier within 7 days. The unit is supplied from the factory
onawoodenpalletsuitableforhandlingwith forkliftequipment.
The weight and the size of the module may require the use of proprietary lifting
equipment in order to be handled safely.
WARRANTY
1. The Grundfos warranty covers all defects within the unit originating from faulty
workmanship and/or materials for a period of one year from the date of installation or
eighteenmonthsfromthedateofdespatch fromthefactory,whicheverissooner.
The warranty covers the replacement of any faulty parts and our labour cost to
replace the faulty parts. It does not cover the cost of removing, returning and refitting
the unit or any secondary losses arising from the failure.
2. Under no circumstances should faulty equipment be dismantled. Failure to comply
with this instruction could invalidate the warranty.
3. Defects arising from the incorrect installation, water containing debris, or harmful
chemicals, inadequate electrical protection, faulty ancillary equipment, lighting or
othercircumstancesbeyondourcontrolisnotcoveredbythis warranty.
Peter Reynolds, General Manager
Grundfos Pumps Ltd

SITE STORAGE
It is strongly recommended once the unit has been delivered to site, that it be placed
immediatelyintoadust,moistureandfrost-freeareathathasbeensecuredto prevent
unauthorisedinterference.Ifthisisnotpossibletheunitshouldbestoredin an area
thatisasneartotheidealstorageconditionsdescribedabove.
APPLICATIONS
TheGrundfosrangeofIMpress unitshavebeendesignedto be compact, reliable
andsimpletouse and to provide manyyearsofefficientand effective service.
The main application of the unit(s) is:
Pressurisation of sealed heating systems
Pressurisation of sealed chilled water systems
MAXIMUM OPERATING CONDITIONS
TheGrundfosrangeofIMpress unitshavebeendesignedto
Liquid temperature range : 3 to +90°C
Ambient temperature : up to +40°C
Relative Humidity : up to 95 %
Maximum operating pressure : 6 Bar
Recommended maximum start-stops per hour : 20 - 30
NOISE LEVEL
The noise level of the pressurisation units referenced in these installation
instructions is lower than the limiting values stated in the EEC machinery
directive.
If pressurisation units are installed close to living accommodation, it is
advisable to fit anti-vibration mountings on the unit and a flexible pipe
coupling on the outlet pipework from the unit to prevent vibration being
transmitted through the system pipework. This applies especially to units installed in
concrete buildings.

INSTALLATION
Do not attempt to start the pump even to check the direction of rotation until
the system has been filled with water and both the pump and the system
have been primed/vented.
All electrical connections should be carried out by a qualified and authorised
electrician in accordance with the latest issue of the I.E.E. regulations.
Do not remove motor terminal box covers, electrical cables or any other
electrical protective covering without first ensuring that the electrical supply
is suitably isolated and cannot be switched on.
Do not attempt to supply electricity to the unit without ensuring that all
electrical fittings, cables and enclosures are intact and suitably electrically
isolated from human touch during operation.
Electrical motors will have hot external surfaces during operation and care
must be taken to ensure that persons cannot come into contact with the
surfaces of the electric motor.
LOCATION
1. The unit should be sited in a dry, well ventilated but frost-free position where it will
not be subjected to extremes of temperature.
2. The environment should be non-aggressive and the atmosphere non-explosive.
3. Ensure that there is sufficient clearance around the unit to allow maintenance
operations to take place without obstruction
4. To enable maintenance and service of the unit to be carried out satisfactorily the
area should have adequate lighting for this work to be carried out safely.
5. The pipe work installation of the unit should be in accordance with local water
authority regulations.
FOUNDATION
The pressurisation unit should be installed on a concrete base, which is both
horizontal and flat to avoid distortion of the base plate.
Please allow a minimum clearance of 500mm above the unit for servicing float valve
and tank, and 750mm in front for servicing pumps and controls).
PRESSURE VESSEL(S)
On heating systems it is vitally important that the expansion vessel(s) has
more than sufficient capacity for the expansion of the liquid in the system. It
isbettertooversize ratherthanundersizefor safety reasons. Itis equally
importanttohavethecorrect pre-chargepressureintheexpansionvessel(s) set in
accordance withthemanufacturersinstructionsandtherequirementsofthe system.

SERVICE CONNECTIONS
Do not open electrical panel enclosures, panel components, pressure
switch covers, motor terminal box covers or any other electrical protective
covering without first ensuring that the electrical supply is suitably isolated
and cannot be switched on.
Do not attempt to supply electricity to the control panel and run the pump
electric motors without ensuring that all electrical fittings, cables and
enclosures are intact and suitably electrically isolated from human touch
during operation.
REMOVAL OF CABINET COVERS
ThetopandthefrontcoverscanberemovedfromtheIMpress cabinetstoallow
access for making electrical and pipe work connections.
Remove the four screws from the top cover, and remove the cover/lid.
Remove the two screws on the front panel. Remove the front panel by lifting it off the
locating pins in the base.
PIPEWORK CONNECTIONS
The service connections to the pressurisation unit should be made as follows.
1. Connect the mains cold water supply to the ball valve ½" BSP male connection on
the side of the pressurisation unit.
2. An isolating valve must be fitted to the mains cold water supply pipework supplying
the pressurisation unit.
3. Connect the discharge pipe (15mm compression) from the pressurisation unit to
an appropriate position on the heating/chilled water system.
4. Connect the over flow pipe (¾" bsp male) from the pressurisation unit break tank
to a suitable drain.
5. The electrical supply connections to the pressurisation unit should be made in
accordance with the wiring diagrams supplied with the unit.
6. If applicable, connect the freestanding expansion tank(s) to the heating/chilled
water system.
7. Ensure the pressurisation unit is not stressed by the pipework connections and
that the pipework is properly supported.

Feeder Water Tank
Microprocessor
Controller
PCB
Transducer
Tank overflow
Mains water in
Pressurised water out (15mm)
NRV
Pumps
Mains supply in
5m of cable
Elecrical connection
Water connection
Transducer
Pump B
Pump A
Low Water
DIMENSIONS, WEIGHTS AND CONNECTION DETAILS
PIPEWORK CONNECTIONS
Water supply connection: ½" BSP Male
Overflow pipe: ¾" BSP Male
System connection: 15mm Compression

Module enclosure
5m of cable
Mains supply
230−240v 45−60 Hz
Pumps (2 off)
NRV (2 off)
Dosed Pressurised
water out (22mm)
Mains water in
Tank overflow
5 Bar
Transducer
Controller
Feeder Water Tank
Transducer
Pump
Pump
Low Water
Dosing pump
Pulsing
Water Meter
Isolation
Valve
(MIpress Glycol Duo system shown)
DIMENSIONS, WEIGHTS AND CONNECTION DETAILS
PIPEWORK CONNECTIONS
Water supply connection: ½" BSP Male
Overflow pipe: ¾" BSP Male
System Connections: 22mm Compression

Cold circuit
Hot circuit
Isolation
Valves
Low Water
Pump
Pump
Transducer
Feeder Water Tank
Controller
5 Bar
Transducers
Tank overflow
Mains water in
Pressurised
water out (22mm)
NRV
(2 off)
Pumps (2 off)
Mains supply
230−240v 45−60 Hz
5m of cable
Module enclosure
Pressurised
water out (22mm)
Transducer
(1 pump per circuit shown)
DIMENSIONS, WEIGHTS AND CONNECTION DETAILS
PIPEWORK CONNECTIONS
Water supply connection: ½" BSP Male
Overflow pipe: ¾" BSP Male
System Connections: 22mm Compression

ELECTRICAL CONNECTIONS
In the interest of electrical safety a local means of isolating the electrical
supplyshouldbelocatedasclose as is practicaltotheunit.
The electrical supply should be connected to a 240 volt single phase 13
amp supply only.
All cables must be of an adequate size to prevent excessive voltage drop in
the supply to the unit. The electrical installation should be in accordance
with the latest issue I.E.E. regulations.
TheIMpress unitsaresuppliedwithapproximately4mmainssupplycablefor
connection into a local isolator switch adjacent to the unit.

Volt Free Contact
Low Water
Pump B
Pump A
240V 1Ph 13A Mains Supply
Microprocessor Controller PCB
Pressure Transducer