Mounting On A Grundfos Base Plate; Bolt Torques; Outdoor Installation; Hot Surfaces - Grundfos CR-H Serie Instrucciones De Instalación Y Funcionamiento

8.4 Mounting on a Grundfos base plate

Check that the Grundfos base plate will fit to your pump model.
The base plate is made with adjustable motor mount sliders to
accommodate a range of Grundfos CR-H pumps. See fig. 11.
The sliders make it possible to separate the motor from the pump
end if service is required.
To mount the pump to the base plate, proceed as follows:
1. Install the base plate (pos. 1) on the foundation in accordance
with the instructions in sections 8.1 to 8.3.
2. If the base plate is grouted, allow grouting sufficient time to
dry.
3. Set the motor mount sliders (pos. 3) in position on the base
plate rails (pos. 2).
Make sure the 1/4" bolts are loose so that the sliders can slide
easily.
4. With a hoist, lower the pump until it is almost on the sliders.
5. Make all necessary adjustments to line up all bolts and bolt
holes and hand-tighten all bolts.
6. Lower the pump completely onto the base plate, and tighten
all bolts to the proper torque (see bolt table).
Fig. 11 Grundfos base plate
Pos. Description
1 Base plate
2 Base plate rail
3 Motor mount slider
4 Motor mounting bolt
5 1/4" bolt
6 Grouting hole
7 5/8" bolt
8 Volute mounting pad
9 Hole for lifting hook
10 ANSI mounting hole

8.4.1 Bolt torques

Motor frame Bolt size
N/A 1/4" - 20 UNC
56C 5/16" - 18 UNC
182/184TC 3/8" - 16 UNC
213/215TC 3/8" - 16 UNC
254/256TC 1/2" - 13 UNC
284/286TSC 1/2" - 13 UNC
324/326TSC 5/8" - 11 UNC
364/365TSC 5/8" - 11 UNC
* Torques are based on SAE Grade 5 bolts.

8.5 Outdoor installation

When installed outdoors, it is recommended to provide the motor
with a rain cover or other shelter. On Grundfos ML motors, it is
also recommended to open the bottom most drain hole in the
motor flange.

8.6 Hot surfaces

Figure 12 shows which pump parts get the same temperature as
the pumped liquid.
Fig. 12 Potentially hot surfaces on a CR-H and CRN-H pump

8.7 Tightening torques

The table below shows the recommended tightening torques for
bolts in flanges.
CR, CRN-H
1s to 5
10 to 20
32 to 90
Bolt torque
[ft-lbs] [Nm]
7 9.5
14 19
25 34
25 34
62 84
62 84
109 148
109 148
Warning
When pumping hot liquids, care should be taken
to ensure that persons cannot accidentally come
into contact with hot surfaces.
Pump head
Pump sleeve
Torque
[ft-lbs]
37-45
45-52
52-59
Volute
[Nm]
50-60
60-70
70-80
11