US Installation and operating instructions
Shipment Inspection ............... 2
Pre-Installation Checklist ........ 2
Installation ..............................3
Electrical ................................. 4
Start-Up ..................................5
Operation ................................ 6
Failure to Operate...................6
Warranty .................................7
CONTENTS
GRUNDFOS INSTRUCTIONS
UP Series circulators
Shipment Inspection
Examine the components carefully to make sure no
damage has occurred to the pump during shipment. Care
should be taken to ensure the pump is NOT dropped or
mishandled; dropping will damage the pump.
Pre-Installation Checklist
Before beginning installation procedures, the following checks
should be made. They are all important for proper installation
of the circulator pump.
1. Uses: Model UP(S)15, 26, 43 and 50 series pumps
are generally designed to circulate water from 32 deg F to
230 deg F up to a maximum pressure of 150 psi. Some
models have temperature limitations which are shown
in Table 2A 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 uids.
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. Maximum Water Temperature: The maximum
allowable water temperature is determined by the ambient
or surrounding air temperature as shown in Table 2A.
Table 2A – Maximum Water Temperature
Ambient (°F) 104 120 140 160 175
Water All UP* (°F) 230 220 210 190 175
UPS15-35 165 140 - - -
UP15-100F (°F)
205 195 185 175 -
UP26-120U (°F)
205 195 185 175 -
UP26-116 (°F)
150 140 - - -
*Exceptions below:
Installation
2
3. Inlet Pressure Requirements
The amount of pressure required at the inlet of the pump is a
function of the temperature of the water as shown in Table 2B.
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.).
Installation
Position of terminal box: Proper installation of the pump
will have the terminal box located to one side of the pump
or the other, with the conduit entry down. See Figure 3A.
If the terminal box position needs to be changed, it is
best to do so before installation. However, if the pump
is already installed, ensure that the electrical supply is
turned off and close the isolation valves before removing
the Allen screws.
To change terminal box position:
1. Remove the four (4) Allen screws (4 or 5mm
wrench) while supporting the stator (motor).
2. Carefully separate the stator from the pump
chamber and rotate it to the correct terminal box
orientation.
3. Replace the Allen screws and tighten diagonally and
evenly (7 ft.-lb. torque).
4. Check that the impeller turns freely. If the impeller
does not turn easily, repeat the disassembly/
reassembly process.
Fluid Temp 230° (110°C) 190° (88°C) 140° (60°C)
Feet of Water 36 ft. (1.10m)9 ft (2.8m) 3 ft (0.9m)
Inlet Pressure 15.6 psi4.0 psi1.3 psi
Table 2B - Minimum Required Inlet Pressure
Figure 3A
Recommended Terminal Box Orientation
3
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