Grundfos CRN-H MAGdrive, Инструкция по установке и эксплуатации

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English (US)
7.2 Applications
The Grundfos CRN-H MAGdrive pumps have been designed for
the circulation or distribution of liquid refrigerant to evaporators in
commercial and industrial refrigeration systems. In addition, the
pumps can be used for liquid pressure boosting (LPB) in systems
operating with low condensing pressures. The pumps can also be
used for the transfer of liquid refrigerant between vessels.
Main applications
• Liquid distribution (LD) to a network of liquid overfeed or direct
expansion (DX) evaporators.
• Liquid pressure boosting (LPB) in the liquid line of refrigeration
systems.
• General liquid transfer (LT) in refrigeration systems.
7.3 Benefits
The benefits of the CRN-H MAGdrive pumps are:
Easy integration into the existing system design
The back-pull-out design of the pump reduces the requirement for
free space around the pumps. Stack assembly can be removed
without disturbing piping.
• ANSI/ASME B73.1 piping dimensions. ANSI 300# flanges
• Due to the low requirement for NPSH, it is easy to integrate
the pump into existing system designs.
• Rotating flange design for easy bolt hole alignment.
The most energy efficient solution
• Full motor program featuring premium efficient Baldor motors.
• Variable speed performance control to match the pump
performance to the actual demand.
• Differential pressure sensor connected to pump inlet and
outlet.
• No need for the loss generating Q-MAX orifice.
Very reliable and robust
• Designed for use with R717 (NH
3
) and selected HFCs in
various types of commercial and industrial refrigeration
systems.
• 316 stainless steel pump casing.
• Drain for removal of liquid refrigerant and/or oil.
Low service cost
• Fast replacement with the Stack concept.
Further significant benefits can be achieved when using the pump
together with a Grundfos CUE frequency converter. In addition to
variable speed performance control, the CUE frequency
converters also establish all the required pump protection
functions. See section
7.1 Pump operation protection
.
7.4 Identification
7.4.1 Nameplate
Example of nameplate CR, CRI, CRN, CRT
Specification of the model line in nameplates:
Fig. 12
Key to model line in nameplates
TM
04
38
95
26
09
Pos. Description
1 Type designation
2 Model, material number, production number
3 Head in feet at rated flow rate
4 Rated motor hp
5 Head at zero flow
6 Rated rpm
7 Rated flow rate
8 Rated frequency
9 Maximum pressure and maximum liquid temperature
10 Direction of rotation
11 Production country
T
M
04
39
04
39
13
1
2
4 3
6
8 7
9 10
5
11
A 12345678 0123
P1 13 41
Sequence of pump within production week
Production week number (01-52)
Material number
Last two digits of production year
Production company
Model e.g.
ABCD