Danfoss HDU-SF Service guide
MAKING MODERN LIVING POSSIBLE
Service
Guide
HDU-SF (Horizontal Distribution Units - Single Flat)
www.heating.danfoss.com
Danfoss A/S is not liable or bound by warranty if these
instructions are not adhered to during installation or service.
The English language is used for the original instructions.
Other languages are a translation of the original instructions.
(Directive 2006/42/EC)
© 2012 Copyright Danfoss A/S
Service Guide HDU-SF (Horizontal Distribution Units - Single Flat)
Table of Contents
1 Introduction .................................................................... 3
2 Drain and Vent .................................................................. 4
3 Replacing the Strainer Filter ......................................................... 5
4 Shutting off the Flow .............................................................. 5
5 Heat Meter ..................................................................... 5
6 Replacing the Heat Meter ........................................................... 11
1 Introduction
1.1 Overview
1.1 Overview .................................................................. 3
1.2 Technical Data ............................................................... 4
1.3 Accessories and Spare Parts ...................................................... 4
5.1 General .................................................................... 5
5.2 Power Supply ................................................................ 6
5.3 Operation .................................................................. 6
5.4 Display Indications ............................................................ 7
5.5 Error Codes ................................................................. 8
5.6 Extension Modules ............................................................ 8
HDU-SF single-port HDU-SF multi-port
1. Ball valve for in- and outlet connection to the riser.
2. Strainer to trap dirt, sand etc. from pipe water (replacement filter available as accessory).
3. AB-PM automatic balancing valve, combines three functions: differential pressure controller, control valve with linear characteristic and
flow limiter.
4. Manifold for radiator connection, flow.
5. Manifold for radiator connection, return.
6. Automatic air vent and drainage (both inlet and outlet has drainage and air vent possibilities).
7. Heat meter for energy measuring, with 8-digit LCD.
8. Cabinet.
Danfoss Heating Solutions VIIGB102
3
Service Guide HDU-SF (Horizontal Distribution Units - Single Flat)
Note! HDU-SF are available with left or right side connections to riser. In this Service Guide all illustrations are shown for the left side
version.
1.2 Technical Data
Max. temperature 90 °C
Max. working pressure 2 bar
Nominal required differential pressure over Unit (HDU-SF) 0.26 bar*
Max. differential pressure in a control loop 0.22 bar
Max. static pressure 10 bar (PN 10)
Connection to riser (in and out) R 3/4"
Connection to radiator 3/4"
Power supply (Heat meter) A-cell battery, 3.6 VDC
* At differential pressure in control loop 10kPa at 100% AB-PM setting.
1.3 Accessories and Spare Parts
Product Code no.
Manifold port plugs (10 pcs.) 003L1246
Filter for strainer 065B8248
Impulse tube with fittings for AB-PM 003L8152
2 Drain and Vent
For draining the inlet and outlet:
close ball valves on supply and return inlet pipes.
▪
use the cap hanging on the drain to open the drain.
▪
The HDU-SF is automatically vented, if necessary.
4
VIIGB102 Danfoss Heating Solutions
SONOMETER™1100
Heat meter
Made in Germany
3030716
087G6103
Installation: high temp.
S/N: 41598383
qs: 5m3/h
qp: 2.5m3/h
qi: 0.025m3/h
PS/PN: 16
DN20 IP54
Θq: 5...130°C
Θ: 1....180°C
ΔΘ: 3...177K
Pt 500
class 2
E1 / M1
P.-Year 2012
GPM
V
ΔT Δ
T
-V
Service Guide HDU-SF (Horizontal Distribution Units - Single Flat)
3 Replacing the Strainer Filter
1. Close ball valves on supply and return inlet pipes.
2. Close all inlet manifold circuits after the AB-PM, using a 5 mm Al-
len key.
3. Remove the strainer cap and replace the filter.
4 Shutting off the Flow
1. Close both ball valves to shut off all radiator circuits in the apartment.
2. Use the manual shut off in the manifold to close a single radiator
circuit., using a 5 mm Allen key. Make sure to close both inlet and
outlet for the circuit.
5 Heat Meter
5.1 General
The following guidelinesmust be observed:
The cables supplied with the meter must not be shortened or changed in any other way.
▪
The regulations on the use of energy meters must be observed!
▪
The meter installation is only to be performed by an authorized installer and/or electrical contractor using personnel trained in the
▪
installation and use of electrical equipment and familiar with the Low Voltage Directive.
The specified operating/ambient conditions are 5 … 55 °C; IP54; 93 % rel. humidity.
▪
The IZAR@SET software is used for readout/parametrization.
Danfoss Heating Solutions VIIGB102
5
Loading...