Hoval ST1 Guide

Rotary heat exchangers
Instructions for installation,
commissioning and maintenance
Hoval | Responsibility for energy and environment
Hoval energy recovery
ST1
ST3
SC1
SE3
SH1
HM1

1 Use 3
1.1 Intended use. . . . . . . . . . . . . . . . . 3
1.2 User group . . . . . . . . . . . . . . . . . 3
2 Safety 4
2.1 Symbols . . . . . . . . . . . . . . . . . . 4
2.2 Operational safety . . . . . . . . . . . . . . 4
3 Delivery 5
3.1 Scope of delivery . . . . . . . . . . . . . . . 5
3.2 Identification and test . . . . . . . . . . . . . 6
3.3 Storage. . . . . . . . . . . . . . . . . . . 6
4 Tools and aids 7
5 Lifting the exchanger 7
5.1 Lifting exchangers on pallets . . . . . . . . . . 7
5.2 Lifting exchangers with SM casing . . . . . . . . 8
5.3 Lifting exchangers with SP casing . . . . . . . 10
5.4 Lifting exchangers with PR casing . . . . . . . 11
5.5 Lifting wheels without casing . . . . . . . . . 12
6 Assembly of segmented exchangers 13
6.1 Casing . . . . . . . . . . . . . . . . . . 13
6.2 Radial walls . . . . . . . . . . . . . . . . 16
6.3 Storage mass . . . . . . . . . . . . . . . 18
6.4 Purge sector. . . . . . . . . . . . . . . . 23
6.5 Seal . . . . . . . . . . . . . . . . . . . 25
6.6 Drive system. . . . . . . . . . . . . . . . 26
7 Assembly of half mounted exchangers 29
7.1 Casing . . . . . . . . . . . . . . . . . . 30
7.2 Radial walls . . . . . . . . . . . . . . . . 31
7.3 Storage mass . . . . . . . . . . . . . . . 32
7.4 Purge sector, seal, drive system . . . . . . . . 33
8 Installation in the air handling unit 34
8.1 Requirements for the installation site . . . . . . 34
8.2 Vertical installation . . . . . . . . . . . . . 34
8.3 Horizontal installation . . . . . . . . . . . . 35
9 Electrical connection 36
10 Commissioning 37
10.1 Checklist. . . . . . . . . . . . . . . . . 37
10.2 Monitoring work after 3 weeks . . . . . . . . 38
11 Maintenance and repair 38
11.1 Maintenance schedule . . . . . . . . . . . 38
11.2 Cleaning the storage mass. . . . . . . . . . 38
11.3 Spare parts. . . . . . . . . . . . . . . . 39
11.4 Replacement of the brush seal . . . . . . . . 40
11.5 Replacement of the V-belt . . . . . . . . . . 41
11.6 Servicing. . . . . . . . . . . . . . . . . 41
2
Rotary heat exchangers
4 219 613-en-03
Content

1 Use
1.1 Intended use
Rotary heat exchangers
Hoval rotary heat exchangers are energy recovery units for installation in venti-
lation and air-conditioning units and for process engineering applications. They
transfer energy through a rotating storage mass, which is alternately heated by
one air stream and cooled by the other. The following application limits apply in
operation:
Temperature
without controller -20…50 °C
with controller -20…45 °C
Pressure drop
1-piece wheels max. 300 Pa
Segmented wheels max. 400 Pa
Table 1: Application limits
Wheels without casing
Hoval wheels without casing are energy recovery components for installation in
ventilation and air-conditioning units and for applications in process engineering.
The following application limits apply in operation:
Temperature -40…70 °C
Pressure drop
1-piece wheels max. 300 Pa
Segmented wheels max. 400 Pa
Table 2: Application limits
Intended use also includes compliance with these instructions. Any usage over
and above this use is considered to be not as intended. The manufacturer can
accept no liability for damage resulting from improper use.
1.2 User group
Caution
Risk of injury from incorrect work. The rotary heat exchangers may only be
installed and maintained by authorised and instructed personnel who are
well acquainted with the units and are informed about possible dangers.
These instructions are for operating engineers as well as specialists in building,
heating and ventilation technology.
3
Rotary heat exchangers
Use
4 219 613-en-03

2 Safety
2.1 Symbols
Caution
This symbol warns against risk of injury. Please heed all instructions
designated by this symbol to prevent injuries and/or death.
Attention
This symbol warns against property damage. Please heed the respective
instructions to prevent risk of damage to the unit and its functions.
Notice
This symbol denotes information about the economic use of the equipment
or special tips.
2.2 Operational safety
The exchangers are constructed in accordance with the state of the art and
are safe to operate. Despite every precaution being taken, potential and not
immediately obvious risks always remain, for example:
■Danger from suspended load
■Danger from trapping of body parts
■Danger from tilting
■Danger from sharp edges
■Danger from falling objects
■Danger when working on the electrical system
Therefore:
■Please read the instructions before unpacking, installing, commissioning and
maintaining the equipment.
■Store the operating instructions so that they are easily accessible.
■Observe any attached information and warning signs.
■Follow the local safety and accident prevention regulations at all times.
■The exchanger may only be installed, operated and serviced by authorised,
trained and instructed skilled personnel:
– Specialists as defined by these operating instructions are those persons
who, based on their training, knowledge and experience as well as their
knowledge of the relevant regulations and guidelines, can carry out the work
assigned to them and recognise potential hazards.
■Unauthorised reconfiguration or modification of the exchanger is not permitted.
4
Rotary heat exchangers
Safety
4 219 613-en-03

3 Delivery
3.1 Scope of delivery
Rotary heat exchangers are delivered on pallets and packaged in film.
Exchangers with stronger packaging are additionally protected with wood fibre
boards and a wooden crate.
The scope of delivery includes:
1-piece rotary heat exchangers with casing:
■Rotary heat exchangers, fully assembled
■Optional components, placed in the casing (in the drive corner):
– Controller loose (CRLL)
– Spare sealing (SX)
– Spare belt (BX)
Segmented rotary heat exchangers with casing:
■Rotary heat exchanger in individual parts:
– Casing with shaft, bearing and hub, in 2 parts
– Radial walls
– Periphery plates
– Storage mass segments
– Mounting kit for assembly
– Drive system (if applicable)
■Optional components, placed in the casing (in the drive corner):
– Purge sector (depending on the exchanger design)
– Controller loose (CRLL)
– Rotation guard (RG2 or RG3)
– Spare sealing (SX)
– Spare belt (BX)
1-piece wheels without casing
■Wheel, fully assembled
Segmented wheels without casing
■Wheel in individual parts:
– Shaft, bearing, hub (pre-assembled)
– Radial walls
– Periphery plates
– Storage mass segments
– Mounting kit for assembly
Fig. 1: Delivery of 1-piece exchangers
Fig. 2: Delivery of segmented exchangers
Fig. 3: Delivery of 1-piece wheels
Fig. 4: Delivery of segmented wheels
5
Rotary heat exchangers
Delivery
4 219 613-en-03

3.2 Identification and test
The type label contains important information for identifying the rotary heat
exchanger.
ST1-LL-SV-1200-PR-V7-A1-5
W1400,H1400,CCP,SHM,RG3
1201620906-020-01
201 45
2020
Hoval Aktiengesellschaft
9490 Vaduz
Liechtenstein
Made in EU
according to ISO 9001
in the Year
Type:
Typ:
Serial no.:
Serie-Nr.:
Net weight: Max. temperatur:
Nettogewicht: kg Max. Temperatur:
Purchase order no.:
Bestellnummer:
Customer material no.:
Kundenmaterialnummer:
°C
Max. pressure difference:
Max. Differenzdruck: 1000Pa
1 2 3 4 5 6
7
Fig. 5: Type label
■Check the consignment against the delivery documents and nameplate to
ensure that it is correct.
■Check the delivery for visible transport damage.
■Report any wrong deliveries and possible transport damage immediately in
writing.
3.3 Storage
If you do not install the exchanger immediately:
■Keep the exchanger in the original packaging.
■Place the exchanger on a level surface.
■Store the exchanger in a dry, dust-free room where it will not be subjected to
vibrations.
■Storage temperature: -20...50 °C (or max. 45 °C for exchangers with controller)
■
1
Design
■
2
Wheel orientation
■
3
Wheel diameter
■
4
Casing type
■
5
Drive system
■
6
Purge sector
■
7
Options
6
Rotary heat exchangers
Delivery
4 219 613-en-03

4 Tools and aids
The following tools and aids are required for assembly:
■Electrical screwdriver
■Drill Ø 3.3 mm
■Pop rivet tool
■Set of Allen keys
■Scissors
■Spanner key set 10 - 19 mm
■Magnetic bit holder 8 mm
■Torque wrench 0- 100 Nm
■Screw clamps
■Rubber mallet
■Personal protective equipment
■Lifting gear
■Measurement tape
■Spirit level
■Threaded rod M10
5 Lifting the exchanger
Caution
Risk of injury caused by falling load, tilting of the exchanger or improper
handling. During all work:
– Wear protective equipment.
– Do not stand under suspended loads.
– Observe safety and accident prevention regulations.
5.1 Lifting exchangers on pallets
■Use a forklift with sufficient load-bearing capacity.
■Make sure that the exchanger is securely attached to the forklift truck with
slings.
7
Rotary heat exchangers
Tools and aids
4 219 613-en-03

5.2 Lifting exchangers with SM casing
■Use lifting gear with sufficient load-bearing capacity.
■Hook the snap hooks of the lifting gear into the lifting eyes on both sides of the
casing.
■Protect the exchanger casing with approx. 30 cm long square timbers.
Fig. 6: Exchangers with SM casing
Turning exchangers
To save transport costs, exchangers with a height > 2700 mm and a width
< 2700 mm are delivered in a turned position. Turn these exchangers into the
upright position before lifting:
■Hook the snap hooks of the lifting gear into the upper corner sections on both sides .
Fig. 7: Turning exchangers
8
Rotary heat exchangers
Lifting the exchanger
4 219 613-en-03

Lifting exchangers packed together
Several exchangers with stronger packaging are delivered side by side on a pallet.
■On the freely accessible side, hook the snap hooks of the lifting gear into the
lifting eyes of the casing.
■On the opposite side, hook the snap hooks of the lifting gear into the upper
corner sections.
■Protect the exchanger casing with approx. 30 cm long square timbers.
Fig. 8: Lifting exchangers packed together
9
Rotary heat exchangers
Lifting the exchanger
4 219 613-en-03

5.3 Lifting exchangers with SP casing
■Use lifting gear with sufficient load-bearing capacity.
■Hook the snap hooks of the lifting gear into the lifting eyes on both sides of the
casing.
■Protect the exchanger casing with approx. 30 cm long square timbers.
Fig. 9: Exchangers with SP casing
Fig. 10: Exchangers with SP casing and option 'Half mounted' (SHM)
Fig. 11: Exchangers with SP casing and option 'Fully mounted' (SFM)
10
Rotary heat exchangers
Lifting the exchanger
4 219 613-en-03