Danfoss FHM-CN1 Pre-assembled Mixing Shunt Installation Guide

June 13, 2024
Danfoss

Danfoss logo Installation Guide
FHM-CN1
Pre-assembled Mixing Shunt

Installation overview

Danfoss FHM-CN1 Pre-assembled Mixing Shunt

Installation procedure

The FHM-CN1 must be connected to a system according to the illustrations.

  1. Pre-mounted union nut (1) for connection to the primary side pipe. The union nut to control valve must be tightened with a torque of at least 85 Nm without any sealing materials.

  2. Pre-mounted union nut (2) for connection to the secondary side pipe or directly on a Danfoss manifold.
    The nut to mixing shunt must be tightened with a torque of 15 to 25 Nm with enclosed rubber gasket.

  3. FTC thermostatic sensor is in package.
    Mount it on the valve according to the enclosed instruction.

Danfoss FHM-CN1 Pre-assembled Mixing Shunt - parts 1

A Flow of primary side
B Flow of secondary side
C Return of primary side
D Return of secondary side

Tips

  1. If the primary side pipe is coming from the bottom, the bend 4 (088U0821) can be ordered as an accessory. The bend must be tightened to the mixing shunt with a torque of 30 to 40 Nm.
  2. Connection 5 and 6 are tightened from the factory. Please double check them during installation. If loosening or leaks occur due to transportation or moving, please tighten:
    • connection 5 at a torque of at least 85 Nm
    • connection 6 at a torque of 15 to 25 Nm

Danfoss FHM-CN1 Pre-assembled Mixing Shunt - parts 2

A Flow of primary side
B Flow of secondary side
C Return of primary side
D Return of secondary side

RoHS compliance

Part Name Hazardous Substances Table
Pb Hg
Pump X
Brass parts X

O: Indicates that this hazardous substance contained in all of the homogeneous material for this part is below the limit requirement in GB/T 26572.
X: Indicates that this hazardous substance contained in at least one of the homogeneous material for this part is above the limit requirement in GB/T 26572.

Danfoss AS

Climate Solutions
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+45 7488 2222
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