Danfoss APP W HC 15-3 Installation guide
Instruction
APP W HC pumps
APP W HC 15 - 30
hpp.danfoss.com
Instruction | APP W HC 15-30 pumps
Table of Contents |
1. |
Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 |
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2. |
System design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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3 |
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2.1 |
Open-ended systems with direct water supply . . . . . . . . . . . . . . . . . . |
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3 |
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2.2 |
Preferred RO system design and P&ID . . . . . . . . . . . . . . . . . . . . . . |
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2.3 |
Reversible pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 |
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2.4 |
General comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 |
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3. |
Building up the pump unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 |
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3.1 |
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 |
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3.2 |
Direction of rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 |
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3.3 |
Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 |
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3.4 |
Protection from too high pressures . . . . . . . . . . . . . . . . . . . . . . . . . . .5 |
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3.5 |
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 |
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4. |
Initial start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 |
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5. |
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 |
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5.1 |
Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 |
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5.2 |
Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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8 |
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5.3 |
Dry running . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 |
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5.4 |
Disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 |
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5.5 |
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 |
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6. |
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 |
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6.1 |
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 |
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6.2 |
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 |
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6.3 |
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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8 |
1.Identification
PUMP
Type |
APP W HC 15 |
Code no. |
180B5000 |
Serial no. XXXXXX02-XXX
MADE IN DENMARK
Danfoss A/S, 6430 Nordborg, Denmark
2 |
AN283148361728en-000402 | 10.2019 |
Instruction | APP W HC 15 - 30 pumps
2. System design |
The design of the system must ensure that |
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self-emptying of the pump during standstill is |
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avoided. |
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The inlet pressure of the pump must never |
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exceed the outlet pressure. This may typically |
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occur in boosted or open-ended systems with |
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direct water supply. |
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2.1 Open-ended systems with direct water |
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supply |
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The pump is supplied with water directly from a |
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feed pump. |
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The inlet pressure for APP W HC 15-30 must be at |
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least 2 barg (29 psig). |
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To protect the pump from being damaged by |
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peaks of high-pressure in case the pump stops |
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momentarily, it is required to mount a low- |
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pressure relief valve on the inlet line. |
2.2 Preferred system design and P&ID
1.Dimension the inlet line to obtain minimum pressure loss (large flow, minimum pipe length, minimum number of bends/ connections, and fittings with small pressure losses).
2.Place an inlet filter (1) in front of the
APP W HC pump (2). Please consult Danfoss filter data sheet for guidance on how to select the right filter. Thoroughly clean pipes and flush system prior to start-up.
3.Place a monitoring pressure switch (3) set at min. inlet pressure between filter and pump inlet. The monitoring switch must stop the pump at pressures lower than minimum pressure.
4.Use flexible hoses (4) to minimize vibrations and noise.
5.In order to eliminate the risk of damage and cavitation, a positive pressure at the inlet (5) is always to be maintained at min. inlet pressure and max. inlet pressure.
Inlet
Outlet
It is recommend to install safety valve or a pressure relief valve (9) in order to avoid high-pressure peaks in case the pump stops momentarilly or is spinning backwards.
6.For easy system bleeding and flushing, a bypass non-return valve (6) is integrated in the APP W HC pump.
7.A non-return valve (7) in outlet can be installed in order to avoid backspin of the pump. The volume of water in the membrane vessel works as an accumulator and will send flow backwards in case of the pump stops momentarily.
8.A safety valve or a pressure relief valve (8) can be installed in order to avoid system damage as the Danfoss APP W HC pump creates pressure and flow immediately after start-up, regardless of any counter pressure.
Note: If a non-return valve is mounted in the inlet line, a low-pressure relief valve is also required between non-return valve and pump as protection against high-pressure peaks.
Media filter |
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Permeate |
Feed |
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4 |
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5 |
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PI |
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Fresh water |
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permeat flush |
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Brine |
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AN283148361728en-000402 | 10.2019 |
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