Install Instructions

3
English (US)
apply to you. This warranty gives you specific legal rights and you
may also have other rights which vary from jurisdiction to jurisdic-
tion.
2. Symbols used in this document
3. General information
The Grundfos MAGNA3 is a complete range of circulator pumps
with integrated controller enabling adjustment of pump
performance to the actual system requirements. In many
systems, this will reduce the power consumption considerably,
reduce noise from thermostatic radiator valves and similar fittings
and improve the control of the system.
The desired head can be set on the pump control panel.
3.1 Applications
The Grundfos MAGNA3 is designed for circulating liquids in the
following systems:
• heating systems
• domestic hot-water systems
• air-conditioning and cooling systems.
The pump can also be used in the following systems:
• ground source heat pump systems
• solar-heating systems.
3.2 Pumped liquids
The pump is suitable for thin, clean, non-aggressive and
non-explosive liquids, not containing solid particles or fibers that
may attack the pump mechanically or chemically.
In heating systems, the water should meet the requirements of
accepted standards on water quality in heating systems.
In domestic hot-water systems, we recommend to use MAGNA3
pumps only for water with a degree of hardness lower than
approx. 14 °dH.
In domestic hot-water systems, we recommend to keep the liquid
temperature below 150 °F (+65 °C) to eliminate the risk of lime
precipitation.
Fig. 1 Pumped liquids
3.2.1 Glycol
The pump can be used for pumping water/ethylene glycol
mixtures up to 50 %.
Maximum viscosity: 50 cSt ~ 50 % water / 50 % ethylene glycol
mixture at +14 °F (-10 °C).
The pump has a power-limiting function that protects against
overload.
The pumping of glycol mixtures will affect the max. curve and
reduce the performance, depending on the water/ethylene glycol
mixture and the liquid temperature.
To prevent the ethylene glycol mixture from degrading, avoid
temperatures exceeding the rated liquid temperature and
minimize the operating time at high temperatures.
It is important to clean and flush the system before the ethylene
glycol mixture is added.
To prevent corrosion or lime precipitation, check and maintain the
ethylene glycol mixture regularly. If further dilution of the supplied
ethylene glycol is required, follow the glycol supplier's
instructions.
Warning
If these safety instructions are not observed,
it may result in personal injury.
Warning
If these instructions are not observed, it may lead
to electric shock with consequent risk of serious
personal injury or death.
Warning
The surface of the product may be so hot that it
may cause burns or personal injury.
Warning
Risk of dropping objects which may cause
personal injury.
Warning
Escaping vapor involves the risk of personal
injury.
Caution
If these safety instructions are not observed,
it may result in malfunction or damage to the
equipment.
Note
Note
Notes or instructions that make the job easier
and ensure safe operation.
Warning
Do not use the pump for flammable liquids, such
as diesel oil and gasoline.
Warning
Do not use the pump for aggressive liquids, such
as acids and sea water.
TM05 2857 0612
Note
Note
Additives with a density and/or kinematic
viscosity higher than those/that of water will
reduce the hydraulic performance.
Max. 95 % RH
Enclosure Type 2