2. Product description
2.1 Introduction
Grundfos pumps are carefully inspected and
tested before shipment. This pump provides long,
efficient, trouble-free performance. To ensure
maximum performance and reliability, follow the
instructions in this manual.
When installing this pump, always follow basic
safety precautions and any federal, state, and
local requirements.
2.2 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.
2.3 Pre-installation checklist
Before beginning installation, perform the
following checks. They are all important for proper
installation of the circulator pump.
2.3.1 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.
2.3.2 Maximum water temperature
The maximum allowable water temperature is
determined by the ambient or surrounding air
temperature as shown in Table A.
5
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