User Guide

5
English (US)
2. Symbols used in this document
3. Product description
3.1 Introduction
Grundfos pumps are carefully inspected and
tested before shipment. This pump should
provide long, efficient, trouble-free performance.
To ensure maximum performance and reliability,
please follow the simple instructions in this
manual.
When installing this pump, always follow basic
safety precautions and any federal, state, and
local requirements.
3.2 Delivery and handling
Examine the components carefully to make sure
no damage has occurred to the pump during
shipment. Take care to ensure the pump is
NOT dropped or mishandled; dropping will
damage the pump.
3.3 Pre-installation checklist
Before beginning installation procedures, the
following checks should be made. They are all
important for proper installation of the circulator
pump.
3.3.1 Applications
Model UP(S)15, 26, 43 and 50 series pumps are
generally designed to circulate water from
+32 °F to +230 °F (0 °C to +110 °C) up to a
maximum pressure of 150 psi (10 bar).
Some models have temperature limitations
which are shown in Table A below. If required,
a 50 % by volume solution of ethylene or
propylene glycol and water can be used;
however, a decrease in pump performance may
result due to an increase in the viscosity of the
solution. Check with manufacturer for
information regarding suitability of pumping
other liquids.
Closed systems
Model UP(S) 15, 26, 43 and 50 series pumps
with cast iron pump housings are designed to
pump water compatible with their cast iron
construction. They are recommended for use in
closed hydronic systems
(i.e. airless, non-potable water).
Open systems
Model UP(S) 15, 26, 43 and 50 series pumps
with stainless steel or bronze pump housings
are designed to pump water compatible with
their construction and can be used in both open
and closed systems.
3.3.2 Maximum water temperature
The maximum allowable water temperature is
determined by the ambient or surrounding air
temperature as shown in Table A.
3.3.3 Inlet pressure requirements
The pressure required at the inlet of the pump is
a function of the temperature of the water as
shown in Table B.
In a pressurized system, the required inlet
pressure is the minimum allowable system
pressure.
In a system open to the atmosphere, the
required inlet pressure is the minimum distance
the pump must be located below the lowest
possible water level of the water source
(tank, pool, etc.).
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.
Caution
If these safety instructions are not
observed, it may result in
malfunction or damage to the
equipment.
Note
Notes or instructions that make the
job easier and ensure safe
operation.