robatherm RM Guide

robatherm | Manuals
June2023
English - translation of the original instructions
Air handling units | Type RM/RL/TI-50

© Copyright by
robatherm GmbH + Co. KG
John-F.-Kennedy-Str. 1
89343 Jettingen-Scheppach
Germany
You can find the currently valid version of these instructions, and further instructions, on our website at
www.robatherm.com/manuals.
This leaflet is based on the generally accepted engineering standards at the time of drafting. Since the printed version is not
subject to change control, the current version must berequested from robatherm or downloaded from the Internet at
www.robatherm.com before application.
This publication, including all illustrations, is protected bycopyright. Any use outside the scope permitted by the Copyright Act
without our consent is illegal and punishable by law. This applies in particular to reproductions, translations, microfilming,
storing, and processing in electronic systems.
Content subject to change.
To improve readability, this document does not use male, female, and non-binary pronouns (m/f/d). All pronouns apply
equally to all genders.
Last modified: June2023

Contents
General remarks 5
Information about these instructions 5
Security 7
General risk sources 7
Personnel qualification 9
What to do in case of danger 9
Installation site requirements 11
Installation site requirements for certain components 12
Footprint requirements 13
Foundation 15
Unit assembly 21
Lifting jack 21
Sound reduction 21
Vibration damping 21
Casing connection 23
Fastening to on-site beams 25
Connection of AHUs with roof rack frame 26
Transport lugs/transport loops 29
Unit connection 29
Air openings down 31
Door 32
Condensate, drain and overflow lines 33
Weatherproof unit 39
Filter component 55
Filter installation 55
Filter monitoring 59
Fan 61
Transport lock 61
Plug fan 63
Heat recovery systems (HRS) 64
Rotary heat exchanger 64
Run around coil 65
Heating coil, cooling coil, and electric heater 66
Heating coil 66
Steam heater 66
Cooling coil 66
Coil connection 67
Electric heater 68
Dampers 69
Damper 69
Pressure relief damper 69
Humidifier 71
Circulating water spray humidifier (low pressure) 72
Fresh water spray humidifier (high pressure) 75

Electro steam humidifier 76
Refrigeration technology (refrigeration plant, heat pump, and split air conditioner)
77
Personnel qualification 78
Connection of the refrigerant line 79
Hydraulic set 80
Inspection 80
Flushing 80
Filling 81
Exhaust ventilating 81
Pressure test 81
Hydraulic system 81
Direct firing 82
Combustion chamber 82
Direct gas-fired heater 83
Control system 84
Field devices 84
UV-C technology 85
Final cleaning 86
Directory 87
List of figures 87
Keyword index 91

General remarks
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General remarks
If the AHU is delivered in several units, they must be assembled in accordance with these instructions
and properly connected to the duct system. All protective devices must be active.
If ready-to-use AHUs (complete machines) are assembled from non-operational AHUs (partly
completed machines), the person responsible for this assembly must carry out conformity evaluation,
issue a certificate of conformity, and attach the CE marking.
Information about these instructions
These instructions will facilitate safe and efficient use of the AHU.
All persons working on the AHU must thoroughly read and understand these
instructions before starting any kind of work.
Safe working is dependent on adhering to all safety information and instructions.
Further information
The instructions describe all the available options. Whether and which options are available in the AHU
depends on the options selected and the country for which the AHU is intended. The illustrations
serve as an example and may differ.

General remarks
6 © robatherm
The instructions consist of several parts and have the following structure:
Fig. 1: Parts of the instructions
Main operating instructions
Transport and unloading
Installation and assembly
Commissioning
Operation and incidents
Maintenance and cleaning
Disabling and disposal

Security
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Security
General risk sources
General hazards
WARNING
Risk of injury due to modifications or use of incorrect spare parts
Serious injuries, death, and material damage can be caused by modifications or
installation of incorrect spare parts.
• Use original spare parts only.
• Do not make any modifications.
WARNING
Danger to life from falling!
If a grate above an air opening is overloaded downwards (>400kg), this will cause
the structure to fail. When a person steps on the grate, the structure may fail,
causing a risk to life by falling through the air opening.
• Do not exceed the maximum load (≤400kg or 2 persons).
WARNING
Danger to life from falling!
Removing the grates in the floor causes a risk to life from falling, as the opening in
the floor is exposed.
• When working on air openings with removed grates, the customer must
provide protection against falling.
• After the work, mount the grates again according to the instructions.
WARNING
Risk to life from falling objects
Risk to life from being struck by falling objects.
• Cordon off the endangered area under the opening to secure persons against
falling objects.
• After the work, mount the grates again according to the instructions.
WARNING
Danger to life from falling!
When stepping on the protection roof, there is a risk to life from falling, as the
protection roof is unsuitable for supporting loads.
• Do not enter the protection roof.

Security
8 © robatherm
NOTE
Material damage due to localized weight
If more than one person enters the AHU at a time or localized loads are otherwise
applied, pans and floors may be deformed.
• Do not let several persons enter the AHU at the same time.
• If this becomes necessary, take suitable measures to distribute the weight
(e.g., grates, wooden boards, wood beams).

Security
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Personnel qualification
The work described in this section may only be performed if the person has the following
qualifications:
Qualified person in accordance with pressure equipment regulation
Qualified electrician
Registered gas installer
Refrigeration specialist
Crane operator
Mechanic
Forklift driver
What to do in case of danger
Fire protection
Solvent-welding agent (Rhenofol solvent-welding agent (THF) –
tetrahydrofuran) and sealing paste (Rhenofol paste)
Solvent-welding agents and sealing paste may contain toxic and environmentally
hazardous substances. Fumes can form an explosive mixture with air. Fumes are
heavier than air and spread at floor level. Ignition is possible over greater distances.
During thermal decomposition, harmful gases and fumes may be generated, and
explosive peroxides may be formed.
• Use self-contained respiratory protection.
• Wear chemical protective suit.
• Cool endangered tanks from a safe distance using water spray.
• Do not use a direct high-pressure water spray for extinguishing.
• For extinguishing, use carbon dioxide (CO2), extinguishing powder, or water
spray. Fight larger fires with water spray or alcohol-resistant foam.
• Do not allow extinguishing water contaminated with pollutants to enter
waterways or waste water system.
• Comply with the safety data sheet of the manufacturer.

Security
10 © robatherm
What to do in case of leaks
Solvent-welding agent (Rhenofol solvent-welding agent (THF) –
tetrahydrofuran) and sealing paste (Rhenofol paste)
Personal protection
• Avoid contact with skin, eyes, and clothing.
• Ensure good air exchange in the danger zone.
• Take precautionary measures against static discharge.
• Wear personal protective equipment (tight-fitting safety glasses with lateral
guards, self-contained respiratory protection (filter type A-P2); chemical
protective gloves (suitable material: butyl rubber; thickness of the glove material:
>= 0.7 mm) and protective clothing).
• Comply with the safety data sheet of the manufacturer.
Environmental protection
• Do not allow it to enter waterways or waste water system.
• Absorb with liquid-binding material (sand, diatomaceous earth, acid binder,
universal binder).
• Disposal according to official regulations. Do not dispose of the product together
with domestic waste.
• In case of contamination of waterways, soil, or waste water system, inform
relevant authorities.
• Comply with the safety data sheet of the manufacturer.

Installation site requirements
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Installation site requirements
Access to the AHU must be restricted so that only staff with the appropriate qualifications (see "Main
operating instructions", chapter "Personnel qualifications") can enter the installation site.
You must observe country-specific standards for the operation and maintenance of equipment rooms
and control centers. The installation site must comply with the applicable building regulations. The
AHU's specific functions must be considered, among other things, by providing ventilation and
maintaining the operation temperature between -20 °C to +45 °C.
The installation site must meet the following requirements:
• must be clean.
• must be free of conductive dust and explosive gases.
• must be free from strong electromagnetic fields.
• must be free of corrosive agents.
• must have proper water drainage.
The installation site of indoor units must meet the following requirements:
• must be dry.
• must be frost-free.
The installation site of weatherproof devices must meet the following requirements:
• it must be selected considering the external impact (e.g., sun, rain, snow, wind, frost) on the
installation site. AHUs must be fastened to the foundation in accordance with the expected wind
load. Service connections and cabling must be carried out professionally.
• It must have a suitable lightning protection system in accordance with country-specific
regulations. The AHU must not be used as part of the external lightning protection system (see
"Main operating instructions", chapter "Lightning protection for weatherproof devices").
• It must comply with the applicable regulations regarding protection against falls of people,
tools, and materials, and suitable fall protection equipment must be in place.

Installation site requirements
12 © robatherm
Installation site requirements for certain components
Refrigeration technology
For AHUs with refrigeration technology, a refrigerant sensor for monitoring the installation site and
suitable ventilation must be present and functional.
The installation site of refrigeration plants is defined according to EN 378.
Steam generator for electro steam humidifier
The following applies to steam generators of electro steam humidifiers:
• Permissible operation temperature: 5 to 40 °C; if necessary, ventilation (if installed in closed
rooms) and/or frost protection must be provided.
• Must not be installed in rooms with underpressure.
Hydraulic set
In the case of weatherproof AHUs with hydraulic sets, hydraulic components must be protected
against frost by the customer (e.g., pipe trace heating, frost protection circuit, frost protection
agents).

Installation site requirements
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Footprint requirements
AHUs have the following footprint requirements:
Fig. 2: AHU footprint requirements
A - revision area; B - unit width; C ≥875 mm; D ≥500 mm
• Leave ≥875 mm (C) free for connections and escape routes on all sides of the AHU.
• To replace components (e.g., coil, filter wall I - O, fan) on the operating side, leave one unit
width (B) free as a revision area (A).
• Leave ≥500 mm (D) free above the AHU as a revision area (A).
Steam generator for electro steam humidifier
For steam generators for electro steam humidifiers, observe the minimum wall clearance according to
the manufacturer.

Installation site requirements
14 © robatherm
HE-RAC hydraulics on stand
The HE-RAC hydraulics on stand has the following footprint requirements:
Fig. 3: Footprint requirements of HE-RAC hydraulics on stand
A - revision area; E ≥350 mm; F ≥500 mm; G - ≥650 mm
• Leave ≥350 mm (E) above the rack for the connections.
• Leave ≥500 mm (F) free as a revision area (A) on the operating side and ≥650 mm (G) in
front of the control cabinet.

Installation site requirements
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Foundation
WARNING
Danger to life due to incorrect setup
Improper use of the transport lugs and brackets for permanent fastening will result in
danger to life due to the AHU falling.
• Set up the AHU on a level and stable foundation.
WARNING
Risk of death due to the AHU falling over
If the AHU is not secured, there is a danger to life if the AHU falls over.
• AHUs must be secured to the foundation.
• If the center of gravity is unfavorable (e.g., height/depth ratio ≥2.5), further
security measures (e.g., steel structure) must be taken.

Installation site requirements
16 © robatherm
AHUs must be installed on a level and stable foundation.
The maximum tolerance to the
horizontal is s = 0.5 % (slope).
Fig. 4: Maximum incline
This corresponds to a maximum
inclination angle of α= 0.3°.
Fig. 5: Maximum inclination angle
The frames of the casing connection
must be parallel to each other.
Irregularities must be compensated by
appropriate supports (e.g., sheet metal
strips).
Fig. 6: Compensating unevenness
The foundation must meet the on-site requirements for statics, acoustics, and
professional water drainage (e.g., pan drain). Install AHU at a sufficient height to the
floor to ensure the required siphon height (see chapter "Condensate, drain and
overflow lines", page 33).
The natural frequency of the support structure, especially in case of steel structures,
must have sufficient distance to the excitation frequency of rotating components (e.g.,
fans, motors, pumps, compressors).

Installation site requirements
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Beam support structure
The support execution (e.g., steel or concrete) is selected on site.
The deflection of the AHU at the
installation site must not exceed 1/500
in relation to the dimensions of the AHU
(L1). If there is a higher deflection due
to the on-site support structure (L2), the
deflection of the AHU can be reduced to
a maximum of 1/500 by additional
support points between the support
structure and the AHU.
Fig. 7: Deflection of the AHU
A beam support structure can be implemented with longitudinal supports or width supports.
Longitudinal supports are on-site supports on which the AHU rests in the longitudinal direction. Width
supports are on-site supports on which the AHU rests in the width direction.
Longitudinal support
The distance (T) of the on-site
longitudinal supports (A) in the width
direction must not exceed T ≤2.5 m.
Fig. 8: Longitudinal support
Longitudinal support for units on DIN frames
For units on DIN frame, two on-site
longitudinal supports (A) are required
over the entire length. The DIN frame
(B) of the AHU rests on these.
Fig. 9: Longitudinal support for units on
DIN frames

Installation site requirements
18 © robatherm
Width support
The positioning of the width supports
(C) depends on the AHU. A width
support (C) is required at each
separation point (D), for pan divisions,
for heavy components (e.g., fans) and
for long components l ≥1.5 m (e.g.,
silencers).
Fig. 10: Width support
Width support for units on DIN frames
The positioning of the width supports
(C) depends on the AHU and the DIN
frame (B). For units on DIN frame, a
width support (C) is required centrally
between the end of the unit and the
transport loop (E) (l1 - l1) and centrally
between two transport loops (E) (l2 -
l2).
Fig. 11: Width support for units on DIN
frames (identification)
Fig. 12: Width support for units on DIN
frames (dimensions)

Installation site requirements
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Foundation spots
A foundation spot is a localized support point for the installation of the AHU.
The positioning of the foundation spots
(F) depends on the AHU. A foundation
spot (F) is required at each separation
point (D), at pan divisions, for heavy
components (e.g., fans) and for long
components of l ≥1.5 m (e.g.,
silencers). The distance (T) of the on-
site foundation spots (F) in the width
direction must not exceed T ≤2.5 m.
The maximum load per foundation spot
(F) is 500 kg.
Fig. 13: Foundation spots
Foundation spot for units on DIN frame
The positioning of the foundation spots
(F) depends on the AHU and the DIN
frame (B). For units on DIN frame, a
foundation spot (F) is required centrally
between the end of the unit and the
transport loop (E) (l1– l1) and centrally
between two transport loops (E) (l2– l2).
Fig. 14: Foundation spot for units on
DIN frame (designations)
Fig. 15: Foundation spot for units on
DIN frame (dimensions)

Installation site requirements
20 © robatherm
Unit foot
Unit feet are used for elevated installation and leveling of the AHU. The unit foot is adjustable in
height. The adjustment range is 100 mm.
The positioning of the unit feet (G)
depends on the AHU. Four unit feet (G)
must be attached per section. The
maximum distance (T, L) is T, L ≤2.5
m. The maximum load per unit foot (G)
is 500 kg.
Fig. 16: Unit foot
Construction for assembly underneath the ceiling
If mounting under the ceiling, the configuration must be provided by the customer. The on-site
construction must comply with the requirements for beam support structures (see chapter "Beam
support structure", page 17). The on-site configuration must be carried out by a specialist, and must
take into account all relevant factors (e.g., statics, load-bearing capacity, fastening, and vibrations).
Fig. 17: Example 1 Fig. 18: Example 2
Fig. 19: Incorrect installation