Heatex B Maintenance and service guide

AIR-TO-AIR HEAT EXCHANGERS
MODEL B
INSTALLATION
& MAINTENANCE

2 (10) HEATEX MODEL B INSTALLATION & MAINTENANCE MANUAL
TEC-1302 Ver 4-2016-05-30
ENGLISH
ADDRESS AND CONTACT DATA
Heatex AB
Bronsyxegatan 13
S-213 75 MALMÖ
Sweden
Telephone: [phone]
[email protected]
www.heatex.com
DISCLAIMER
Information in this document (including URL references and information from other external sources
referred herein) is subject to change without notice. Owing to continued product development, Heatex
reserves the right to introduce alterations in both design and prices without prior notice.
THIS DOCUMENT IS PROVIDED ”AS IS” WITH NO EXPRESSED OR IMPLIED
WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY,
NON-INFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, OR OTHERWISE
ANY WARRANTY ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. ALL
LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PROPRIETARY
RIGHTS, RELATING TO USE OF INFORMATION CONTAINED OR REFERENCED IN
THIS DOCUMENT IS HEREBY EXPRESSLY DISCLAIMED.
COPYRIGHT NOTICE
All information and content included (whether directly or by reference) in this document, such as
text, graphics and images, is the property of Heatex AB, its subsidiaries, afliates, licensors and/or
joint venture partners. All rights are reserved.
No licenses, express, implied or otherwise to any intellectual property rights in this document are
granted by Heatex AB.
This disclaimer and copyright notice is subject to and governed by Swedish law.
Copyright © 2016
Heatex AB

3 (10)HEATEX MODEL B INSTALLATION & MAINTENANCE MANUAL
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DECLARATION OF INCORPORATION
Description and identication of the partly completed machinery:
Rotary heat exchanger model B with casing and with a drive unit.
The following essential requirements of EC Machinery Directive 2006/42/EC have been applied and
fullled:
1.1.2, 1.2.1, 1.2.3, 1.2.4.1, 1.2.4.2, 1.2.4.3, 1.2.6, 1.3.1, 1.3.2, 1.3.4, 1.3.7, 1.3.8, 1.3.8.1, 1.3.8.2, 1.4.1,
1.4.2.1, 1.4.2.2, 1.4.2.3, 1.4.3, 1.5.1, 1.5.2, 1.5.4, 1.5.5, 1.5.6, 1.6.1, 1.6.3, 1.7.1, 1.7.3, 1.7.4, 1.7.4.1,
1.7.4.2, 1.7.4.3
The relevant technical documentation has been compiled in accordance with Annex VII, Part B of
EC Machinery Directive 2006/42/EC. We undertake, in response to a reasoned request, to supply it in
electronic form to the market surveillance authorities within a reasonable period.
The party authorized to compile the technical documentation is:
Johan Gidner, R&D Manager
The partly completed machinery must not be put into service until the nal machinery into which it is
to be incorporated has been declared in conformity with the provisions of the Machinery Directive.
Malmö, 2014-07-18
___________________________
Knud Foldschack
CEO

4 (10) HEATEX MODEL B INSTALLATION & MAINTENANCE MANUAL
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CONTENT
1. GENERAL _____________________________________________________________________ 5
2. AT DELIVERY __________________________________________________________________ 5
2.1. Transport ____________________________________________________________________ 5
3. STORAGE ____________________________________________________________________ 5
4. INSTALLATION ________________________________________________________________ 6
5. ADJUSTMENTS _______________________________________________________________ 6
6. MAINTENANCE _______________________________________________________________ 7
6.1. Matrix ______________________________________________________________________ 7
6.2. Hybrid/Adsorption Material ____________________________________________________ 7
6.3. Powerbelt ___________________________________________________________________ 7
6.4. Round Belt ___________________________________________________________________ 7
6.5. Brush Sealings _______________________________________________________________ 7
6.6. Controller ____________________________________________________________________ 7
6.7. Application Limits _____________________________________________________________ 8
6.8. Troubleshooting ______________________________________________________________ 8
6.9. Conditions to Fulll the Hygiene Certication Requirements __________________________ 9
7. SUPPORT ____________________________________________________________________ 9

5 (10)HEATEX MODEL B INSTALLATION & MAINTENANCE MANUAL
TEC-1302 Ver 4-2016-05-30 ENGLISH
1. GENERAL
A rotary heat exchanger with casing and drive is
“partly completed machinery” as dened in Directive
2006/42/EC. This product is delivered in compliance
with the Directive 2006/42/EC but when installed
in the complete machinery it is up to the installer to
make sure that the nal product complies with the
directive.
Special attention should be paid to sharp edges (risk
of cuts) and that when the wheel is rotating the rotat-
ing parts may cause injuries.
The surfaces of the drive motor and gear can be hot
and attention should be paid to the risk of burn in-
juries.
The sound level from the heat exchanger is less than
70 dB (A).
2. AT DELIVERY
Before installation, the following should be checked:
• Check if there are any signs of transport
damage before accepting the goods.
• Has the right exchanger been delivered? Check
type, design, size and options.
• How is the exchanger to be positioned?
• In case of any damage, please report this in
writing by fax or email as soon as possible.
2.1. Transport
• The weight of the unit can be found on the
product label attached to the unit
• Always transport the exchanger vertically.
• Lift the exchanger in the upper two aluminum
rods alternatively the gables according to
picture 1.
• It is important that all transport is carried out
by qualied staff.
All transport and handling shall be carried out by
qualied staff.
Picture 1. Lift the casing at the gables.
3. STORAGE
There are no other requirements for storage than a
horizontal even surface and out of weather. Please
note that an uneven surface can warp the cassette and
affect the factory adjustments.
Always make sure that the heat exchanger is sup-
ported and secured during transport, handling, stor-
age and installation so it cannot fall over and cause
damage or injuries.
Heat exchanger may fall over if not secured.
Please observe that there may be sharp edges and a
risk for cuts so we recommend that gloves be used
when the heat exchanger is handled.
Use gloves when handling the
heat exchanger.

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4. INSTALLATION
• When designing the air handling unit and/
or duct system, the system designer needs to
make sure it is possible to remove/pull out the
heat exchanger for inspection, maintenance,
service, cleaning and disinfection. Furthermore,
the system designer needs to consider enough
space inside and outside of the system to make
sure that it is possible to remove/pull out the
heat exchanger.
• For bigger heat exchanger units it is required
to add doors or hatches on all sides in the
air-handling unit and/or duct system making
it possible to access the heat exchanger for
inspection, maintenance, service, cleaning and
disinfection.
• In case condensate is present, it is required by
the designer of the air handling unit and/or
duct system, to design and install a condensa-
tion tray according to the norm VDI 6022,
chapter 4.3.16
• The casing is self-supporting but cannot take
up extra load e.g. ducts.
• Place the rotor on a horizontal surface since an
uneven surface can warp the casing and affect
the factory adjustments.
• Make sure that the front- and back plates of
the casing are installed perpendicular to the
horizontal bottom surface. If not the casing
may interfere with the movement of the rotor
wheel.
• In case of horizontal rotors, support is needed
for the frame and center girder. Also, check that
rotor is ordered and manufactured as a hori-
zontal rotor. Rotor may only be installed either
in a vertical or a horizontal position according
to design, not at an angle.
• Avoid diagonal ow since this can affect the
rotation and drive of the wheel. Heatex AB
recommends the airow to be perpendicular to
the rotor.
• The rotor is designed for counter ow only; co-
current ow will decrease efciency and reduce
the rotors self-cleaning ability.
• Prior to initial operation, please make sure no
objects are blocking the rotors movement. The
rotor should move evenly and smoothly around
its shaft.
Placing the unit on an uneven surface
may warp the casing.
• Drive motor if delivered with controller is
pre-wired and 230V should just be wired to
the controller. Constant speed motors are
without wiring. It is important that all electrical
work is carried out by qualied staff. Please
see enclosed documentation and/or wiring
Picture 2.
• If the unit is delivered with a variable speed
drive, read the corresponding controller
documentation.
5. ADJUSTMENTS
• If necessary, adjust the brush sealants to mini-
mize leakage.
• If the belt slides adjust belt tension.
• The round belt should have a tension of 4-6%
and Powerbelt should have a tension of 1-2%
(i.e. belt should be 1-2% shorter than the length
it travels). For Powerbelt remove one link per
meter belt to get correct tension
IMPORTANT!
All electrical work must be carried
out by qualied staff
Picture 2. Wiring diagram constant drive Δ/Y 220/380V.

7 (10)HEATEX MODEL B INSTALLATION & MAINTENANCE MANUAL
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6. MAINTENANCE
6.1. Matrix
To secure the function and performance, the face of
the rotor has to be inspected regularly for dust and
dirt. In most cases, the rotor is self-cleaning due to
counter ow and rotation of the matrix and this
makes manual cleaning unnecessary. If the self-clean-
ing is insufcient dirt or/and dust can appear in the
matrix. Depending on the degree of soiling it is rec-
ommended to use following cleaning.
1. For only a small amount of easily removable
dirt, Heatex recommends to use a vacuum
cleaner.
2. For heavier dirt it is also possible to use
compressed air but with caution.
3. Firmly attached dirt in the rotor is easiest re-
moved by using hot water and a mild detergent.
The mild detergent may be removed with high-
pressure water cleaner with the nozzle placed
100-200 mm from the matrix.
4. If required, Heatex recommends disinfection
with the substance known as LIV +45.
6.2. Hybrid/Adsorption Material
The adsorption material is aluminum coated with a
silica gel based coating. There is a small amount of
surplus material that might leave the matrix during the
rst time of usage. This will NOT affect the hygro-
scopic properties. The excess powder is harmless and
easy to remove using a vacuum cleaner.
The hybrid wheel properties are obtained by a com-
bination of a at strip of adsorption material consist-
ing of silica gel coated aluminum and a corrugated
aluminum strip, which result in a moisture transfer
capacity in between that of an aluminum matrix
and an adsorption matrix. Just as for the adsorption
wheel, a small amount of surplus material may leave
the matrix during the rst time of usage.
6.3. Powerbelt
The Powerbelt is subject to natural stretching which
may require shortening of the belt. Tension of the
belt must be checked after the rst 24-48 hours in op-
eration to secure the rotational function of the wheel.
The belt is made of links that can easily be added or
removed without any tools. By just twisting the belt, it
is possible to open it and remove links to shorten the
belt until correct length and belt tension is obtained.
Belt tension should be 1-2% (i.e. belt length 1-2%
shorter than travelled length). For Powerbelt remove
one link per meter belt to get correct tension.
6.4. Round Belt
In addition, the round belt may need adjustment.
When delivered from factory the belt is welded
together. If adjustment is needed the belt must be cut,
shortened and joined together again with a special
joining pin. Belt tension should be 4-6%.
6.5. Brush Sealings
Tightness between brush sealants and casing has to
be checked during inspection. The brush sealants are
easily adjusted by unscrewing the screws and moving
the brush sealant into the right position.
6.6. Controller
For further information regarding rotary heat ex-
changer equipped with controller, please see corre-
sponding controller instructions.

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6.7. Application Limits
Recommended temperature limits for rotary heat ex-
changer:
It is however important not to exceed the temperature
limits on mounted components:
Component Min Max
Bearings -40°C (-40°F) 110°C (230°F)
Round belt -40°C (-40°F) 66°C (150°F)
Power belt -40°C (-40°F) 110°C (230°F)
Motor * -20°C (4°F) 40°C (104°F)
EMX-R controller -30°C (-22°F) 40°C (104°F)
Standard controller 0°C (32°F) 45°C (113°F)
* Thermo contacts release at 150°C (302°F) inner temperature.
Temperature inside casing is approximately the mean
temperature of supply and exhaust air temperatures.
Recommended pressure drop and differential pressu-
re for rotary heat exchanger:
• Pressure drop max 300 Pa (1.2” WC) during
start up and maintenance.
• Recommended pressure drop 100-200 Pa
(0.4-0.8” WC) during normal operation.
• Differential pressure max 600 Pa (2.4” WC).
6.8. Troubleshooting
If the rotary heat exchanger does not rotate properly,
please follow these steps to solve/locate the problem.
1. If the motor runs properly, please jump to
step 5.
2. If there is a controller installed please check
controller technical specications, chapter
troubleshooting.
3. If there is a constant drive installed: Please
check that the drive is correctly connected.
Note that all electrical maintenance and installa-
tion must be performed by qualied personal.
4. Disconnect the belt, is the motor running
correctly?
5. If the belt is sliding, please tighten the belt
according to maintenance instruction.
6. Rotate the wheel by hand (belt disconnected
from the motor). Is it possible to smoothly
rotate the wheel or does the wheel interacts
with the casing? If there is mechanical friction,
please locate the position.
7. Make sure the connected ducts do not press on
the casing making it squeeze against the wheel.
Make sure the diagonal measures of the casing
side where the motor is positioned are equal.

9 (10)HEATEX MODEL B INSTALLATION & MAINTENANCE MANUAL
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• Purge sector is required in order to make sure
that less carry-over than 3% is reached.
• The AHU needs to be designed with hatches or
openings towards all 4 open sides of the rotary
heat exchanger. The heat exchanger itself has
all 4 sides open according to the picture 3.
• All surfaces inside and outside of the rotor cas-
ing, especially the bottom surface and around
the motor should be reachable for maintenance,
cleaning and disinfection. Meaning that the
openings or hatches mentioned in the item
above need to be of sufcient size to fullling
the cleaning and disinfection requirements.
• The AHU needs to be designed in such a way
that the rotary heat exchanger is possible to
slide out for cleaning and disinfection.
• Cleaning and disinfection of the heat exchang-
er should be done in accordance with Heatex
cleaning and disinfection instructions with the
cleaning and disinfection substances prescribed
by Heatex.
• When condensation is present, the AHU
installer needs to make sure that condensation
trays are installed beneath the heat exchanger.
These trays need regular inspection, cleaning
and disinfection.
• The trays should be designed and installed
with sufcient drainage in accordance with the
hygiene standard VDI 6022, chapter 4.3.16.
• The heat exchangers are not certied for in-
stallation in exhaust classes ETA 3 and ETA 4
according to EN 13779 (09/2007).
7. SUPPORT
For questions or information regarding this product,
please communicate your order number and product
code along with your message.
Heatex is available for support during ofce hours:
8 am – 4.30 pm (GMT +1) on weekdays.
Picture 3. All 4 sides are open on the heat exchanger.
The AHU designer and installer need to have openings
or hatches on all of these 4 sides in the AHU for easy
access during maintenance, cleaning and disinfection of
the heat exchanger.
6.9. Conditions to Fulfill the Hygiene Certification Requirements