Condair GS C Series Guide

INSTALLATION, COMMISSIONING AND
SERVICE INSTRUCTIONS
Gasfired steam humidifier
1119123 EN 0906
Condair GS… C series

3
Contents
1 Introduction 4
1.1 At the very beginning 4
1.2 Notes on the installation, commissioning and service instructions 4
2 For your safety 6
3 Product Overview 8
3.1 Product versions/Model designations 8
3.2 Delivery 8
3.3 Humidification system overview 9
3.4 Construction of the gasfired steam humidifier 10
3.5 Principle of operation 11
4 Basic planning 13
4.1 Selecting the unit 13
4.2 Selecting the control system 15
4.3 Options 17
4.4 Accessories 17
5 Mounting and installation works 19
5.1 Important notes on mounting and installation works 19
5.2 Unit fitting 20
5.3 Steam installation 24
5.4 Water installation 31
5.5 Gas installation 34
5.6 Flue gas installation 37
5.7 Installation of the air inlet line for room air-independent units (RS units) 42
5.8 Installation of control and monitoring devices 44
5.9 Electrical Installation 45
6 Inspecting the installations (Check list) 47
7 Operation 49
7.1 Important notes on operation 49
7.2 Function of the display and operating elements 50
7.3 Commissioning 51
7.4 Notes on operation 53
7.5 Taking the unit out of operation 53
8 Maintenance 54
8.1 Important notes on maintenance 54
8.2 Maintenance instructions 54
8.3 Dismantling work for maintenance and the replacement of components 56
8.4 Notes on cleaning agents 66
8.5 Resetting the maintenance reminder 66
9 Troubleshooting 67
9.1 Important notes on troubleshooting 67
9.2 Error indication 67
9.3 Resetting the error indication 67
10 Specifications 68
10.1 Technical Data 68
10.2 Flue gas specifications 69

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1.1 At the very beginning
Thank you for deciding on the Condair GS C series Gasfired Steam Humidifier (abbreviated as
“Condair GS”).
The Condair GS incorporates the latest technical advances and satisfies the requirements of the
European Gas Equipment Directive (90/396/EEC) and all known safety standards. Nevertheless,
improper use may result in danger to the user or third parties and/or impairment of the installation
or other material assets.
To ensure a safe, proper, and economical operation of the Condair GS, please observe and comply
with all information and safety instructions contained in the present installation, commissioning and
service instructions as well as the instructions given in the manuals for the components used in the
humidification system.
If you have questions, which are not or insufficiently answered in this documentation, please contact
your Condair supplier. They will be glad to assist you.
1.2 Notes on the installation, commissioning and service instructions
Limitation
The subject of these installation, commissioning and service instructions is the Condair GS C series
Gasfired Steam Humidifier in its different versions.The various accessories are only described insofar
as this is necessary for proper operation of the equipment. Further information on accessories can
be obtained in the respective instructions.
These installation, commissioning and service instructions is restricted to the planning, installation,
commissioning, operation, servicing and trouble shooting of the gasfired steam humidifier Con-
dair GS and is meant for well trained personnel being sufficiently qualified for their respective
work.
These installation, commissioning and service instructions are supplemented by various separate
items of documentation (operating instructions for Condair GS/GS...OC - C series control, spare
parts list, etc.). Where necessary, appropriate cross-references are made to these publications in
the installation, commissioning and service instructions.
1 Introduction

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Symbols used in this documentation
CAUTION!
The catchword “CAUTION” designates notes in this documentation that, if neglected, may cause
damage and/or malfunction of the unit or other material assets.
WARNING!
The catchword “WARNING” used in conjunction with the general caution symbol designates safety
and danger notes in this this documentation that, if neglected, may cause to injury to persons.
DANGER!
The catchword “DANGER” used in conjunction with the general caution symbol designates safety
and danger notes in this this documentation that, if neglected, may lead to severe injury or even
death of persons.
Safekeeping
Please safeguard these installation, commissioning and service instructions in a safe place, where
they can be immediately accessed. If the equipment changes hands, the installation, commissioning
and service instructions should be passed on to the new operator.
If the installation, commissioning and service instructions get mislaid, please contact your Condair
supplier.
Language versions
These installation, commissioning and service instructions are available in various languages. Please
contact your Condair supplier for information.
Copyright protection
The present installation, commissioning and service instructions are protected under the Copyright
Act. Passing-on and reproduction of the installation, commissioning and service instructions (or
part thereof) as well as exploitation and communication of the contents are prohibited without writ-
ten permission by the manufacturer. Violation of copyright terms is subject to legal prosecution and
arises liability for indemnification.
The manufacturer reserves the right to fully exploit commercial patent rights.

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General
Every person working with the Condair GS must have read and understood the installation, commis-
sioning and service instructions before carrying out any work.
Knowing and understanding the contents of the installation, commissioning and service instructions
is a basic requirement for protecting the personnel against any kind of danger, to prevent faulty op-
eration, and to operate the unit safely and correctly.
If the information in these installation, commissioning and service instructions is not fol-
lowed exactly, a fire or explosion may result causing property damage, personal injury or
loss of life.
All ideograms, signs and markings applied to the unit must be observed and kept in readable
state.
Qualification of personnel
All actions described in the present Installation, commissioning and service instructions (commis-
sioning, operation, maintenance, etc.) must be carried out only by well trained and sufficiently
qualified personnel authorised by the owner.
For safety and warranty reasons any action beyond the scope of this manuals must be carried out
only by qualified personnel authorised by the Conair representative.
It is assumed that all persons working with the Condair GS are familiar and comply with the appropri-
ate regulations on work safety and the prevention of accidents.
Intended use
The gas fired steam humidifier Condair GS is intended exclusively for humidification in ventila-
tion systems within the specified operating conditions. Any other type of application without
the express written consent of the manufacturer is considered as not conforming with the intended
purpose and may lead to the Condair GS becoming dangerous.
Operation of the equipment in the intended manner requires that all the information in these
installation, commissioning and service instructions is observed (in particular the safety
instructions).
Danger that may arise from the unit
DANGER! Danger of electric shock
The Condair GS is mains powered. One may get in touch with live parts when the unit is
open. Touching live parts may cause severe injury or danger to life.
Prevention:before carrying out any work set the Condair GS out of operation as described in
chapter 6.3 (switch off the unit, disconnect it from the mains and stop the water and gas supply)
and secure the unit against inadvertent power-up.
2 For your safety

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DANGER! Danger of explosion
The Condair GS is working with gas. Improper installation, adjustment, alteration, service,
maintenance, or use can cause carbon monoxide poisoning, an explosion, fire, or other
conditions which may cause personal injury or property damage.
Prevention:any work on the gas system must be carried out only by well trained and sufficiently
qualified personnel authorised by the owner. Before carrying out any work on the gas system set
the Condair GS out of operation as described in chapter 6.3. (switch off the unit, disconnect it from
the mains and stop the water and gas supply) and secure the unit against inadvertent power-up.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any
other appliance
What to do if you smell gas: do not try to light any appliance. Do not touch any electrical switch;
do not use any telephone in your building. Immediately call your gas supplier from a neighbor’s
telephone. Follow the gas supplier’s instructions. If you can not reach your gas supplier, call the
fire department.
DANGER! Danger of burning
The water tank, the steam line and the exhaust system get very hot during operation.
There is danger of burning when touching these components during or shortly after opera-
tion.
Prevention:Do not touch the water tank, the steam line and the exhaust system during operation.
Before carrying out any work set the Condair GS out of operation as described in chapter 6.3 , then
wait until the components has cooled down sufficiently thus preventing danger of burnin.
Behaviour in case of danger
If it is suspected that safe operation is no longer possible, then the Condair GS should immediately
be shut down and secured against accidental power-up according to chapter 6.3. This can be
the case under the following circumstances:
– if you smell gas
– if the Condair GS or its mains cable is damaged
– if the Condair GS is no longer operating correctly
– if connections and/or piping are not sealed
– if components of the Condair GS humidifier are worn or badly soiled.
– if the Condair GS or any components has been exposed to excess humidity.
– after longtime storage under unfavorable conditions.
– after transportation under unfavorable conditions.
All persons working with the Condair GS must report any alterations to the unit that may affect safety
to the owner without delay.
Prohibited modifications to the unit
No modifications must be undertaken on the Condair GS without the express written consent of
the manufacturer.
For the replacement of defective components use exclusively original accessories and spare parts
available from your Condair supplier.

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3 Product Overview
The Condair GS gasfired steam humidifier is available in 6 different models with different maxi-
mum steam output performance (40, 80, 120, 160, 200 and 240 kg/h).
All models can be supplied in a version suitable for operation independent of the room air conditions
(With a separate air inlet) and can be operated with natural gas or propane (the unit is supplied Ex-
works for a specific type of gas operation).
Model designation
GS 40 C G20 RS
Product line
(gasred steam humidier with
operation and display unit)
Steam output (kg/h)
40
80
120
160
200
240
Equipment series
Fuel
Natural gas H, E, E(S): G20
Natural gas L, ELL: G25
Natural gas HS: G25.1
Natural gas Lw: G27
Natural gas Ls: GZ350
Propane gas P: G31
Room air-independent unit
(with separate air intake)
The humidifiers are equipped with an operating and display unit, as standard, by means of which
the current operating parameters can be interrogated and the equipment can be configured for op-
eration. The humidifiers are controlled via the internal PID controller or an external continuous
controller.
3.2 Delivery
The standard delivery includes:
– Gasfired steam humidifier Condair GS compl. with unit stand (according to the model designa-
tion)
– Installation, commissioning and service instructions Condair GS C series
– Operating instructions Condair GS control
– Spare parts list
– Accessories ordered according to chapter 4.4 (steam distribution pipes, steam hoses, etc.).
3.1 Product versions/Model designations

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3.3 Humidification system overview
1 Gasfired steam humidifier
2 Electrical connections
3 Gas supply connection
4 Shut-off valve gas supply line (building side)
5 Gas supply line (building side)
6 Sediment trap (building side)
7 Fill water connection
8 Filter valve (accessory “Z261”)
9 Water supply line (building side)
10 Drain water connection
11 Drain water line
12 Funnel with trap
13 Auxiliary drain connection
14 Shut-off valve auxiliary drain (building side)
15 Flue gas pipe
16 Flue gas adapter with condensate drain
(accessory “FA...”)
17 Air intake pipe (RS-units only)
18 Main steam pipe (building side)
19 Steam hose adapter (accessory “SA...”)
20 Steam hose (accessory “DS80”)
21 Steam distribution pipe (accessory “81–...”)
22 Condensate hose (accessory “KS10”)
1
10
5
8
9
15
16
12
14
13
17
2
4
3
76
11
12
21
19
18
22
20
22

10
3
4
2
1
15
22
19
20
23
24
25
26
27
21
28
29
14 17
18
16
5 6
10
7 98
12
1311
1 Water tank
2 Steam outlet(s) (1 to 6)
3 Heat exchanger (1 to 3)
4 Burner (1 to 6)
5 Level unit
6 Key pad and display unit
7 Indication LED’s
green: “Steam production”
yellow: “Maintenance”
red: “Error”
8 Drain key (manual draining)
9 Unit switch
10 Tansformer
11 Control board
12 Driver board
13 Remote operating and fault indication board
3.4 Construction of the gasfired steam humidifier
14 Ignition modules
15 Burner electronic
16 Combustion air blower (1 to 6)
17 Flame sensor
18 Igniter
19 Drain pump
20 Air pressure switch
21 Gas pressure control valve (1 to 6)
22 Auxiliary drain line
23 Drain connection
24 Double inlet valve filling water
25 Connection filling water
26 Connection gas supply line
27 Vacuum break
28 Filling chamber
29 Pressure equalizer line (level unit)

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C
B
A
3.5 Principle of operation
Combustion System
The combustion system is based on a fully modulating forced draft combustion air blower, a negative
pressure regulator gas valve and a 100% premix burner. On a call for humidity, the combustion air
blower starts and creates a negative pressure across an orifice located at the air inlet. The blower
starts for a moment to purge the system, then the hot surface ignitor is activated for 15 seconds.
During this time the electronic ignition module does a diagnostic check of safety systems including
the air proving switch which senses the negative pressure at the air inlet.
After the function of the safety systems has been verified, the gas valve will open and the gas/air
mixture is ignited by the hot surface ignitor. If flame is sensed by the flame sensor within 3 seconds
the gas valve remains open and combustion continues. If flame is not sensed, the above sequence
is repeated a maximum of three times after which the ignition module will lock out and a respective
error message will appear in the display.
The gas valve maintains a constant ratio of air to Natural Gas or Propane independent of blower
speed or external conditions. This air and fuel is thoroughly mixed in the blower and then forced
through the burner ports where ignition occurs.
Hot products of combustion are forced through a baffle inside the heat exchanger and then vented
outside. The heat exchanger has large vertical surfaces to minimize scale build-up and promote scale
shedding to the bottom of the tank. This self-cleaning action helps to maintain the efficiency of the
heat exchanger while the smooth surfaces allow for easy cleaning when necessary.
The GS 40 has a single combustion chamber/heat exchanger. The combustion system is duplicated
on larger units with multiple chambers inside a common tank.
Regulation of the water level in the tank
The level in the water tank is continuously monitored by the level unit. On initial start-up, the control
unit checks the function of the level unit. During this test the tank is filled up first to level “A”, then
drained to level “C” and filled up again to level “A”. As soon as level “B” is reached and the test of the
level unit was successful the humidifier is ready for operation, if a humidification demand is present
the combustion process starts.
Level unit
Pressure equalizer
Filling chamber
Vacuum break
Main fill line
Double fill valve
Drain outlet
Drain pump
Auxiliary drain
Mixing pipe

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When the water level due to the evaporation process reaches level “B”, the level unit sends a signal
to the control system, which opens the double inlet valve and the water tank is filled up. On reach-
ing level “A”, the level unit again sends a signal to the control system and the double inlet valve is
closed.
If the water level goes below level “C”, the combustion will be interrupted until the water level reaches
“C” again.
To ensure safe operation, the control system constantly monitors the proper function of the level unit
in regular intervals.
Steam generation/control
The steam is generated in the water tank via the heat exchanger/s. The steam production is regulated
continuously by the internal PID controller or an external continuous controller.
Flushing
The concentration of minerals in the water in the tank increases due to the evaporation process. In
order that this concentration does not exceed a specified value, an appropriate quantity of water is
pumped off from the tank at a fixed time interval and replaced by fresh water. These flushing cycles
are based on steam production to increase the efficiency of the humidifier.
When a flushing cycle is initiated the drain pump is activated and the inlet valve opens. In the mixing
pipe below the filling chamber the hot drain water is mixed with the cold cooling water and leaves
the unit with a temperature approx. around 60 - 70 °C.
If the lowest operating level is reached in the tank during the flushing process, the inlet valve remains
open until the water level in the tank has again reached the normal operating level.

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4 Basic planning
Condair GS 80 C G20 RS
1. Required maximum steam capacity
2. Required combustion gas
3. Combustion air supply
4.1 Selecting the unit
The selection of the unit is reflected in the type description:
4.1.1 Calculating the maximum required steam capacity
The maximum required steam capacity is calculated from the following formulas:
 V•ρ
mD= • (x2 - x1)
1000
or
V
mD= • (x2 - x1)
 1000•ε
mD: maximum steam demand in kg/h
V: volume of supply air portion per hour in m3/h (for indirect room humidification) or room volume
to be humidified per hour in m3/h (for direct room humidification)
ρ: specific gravity of air in kg/m3
ε: specific volume of air in m3/kg
x2: desired absolute room air humidity in g/kg
x1: minimum absolute supply air humidity in g/kg
The values for ρ, ε, x2 and x1 can be gathered from the h,x-diagram or the Carrier-Diagram for moist
air respectively.
For a rough estimate of the calculated steam capacity, the following table can be used. The values
listed in the table are based on a desired room air temperature of 20 °C and a desired relative room
air humidity of 45 %rh.
Note: To roughly estimate the calculated maximum steam capacity for larger supply air portions or
room volumes, the values listed in the table can be projected accordingly.
Max. portion of supply air in m3/hr or room vol-
ume to be humidified per hour in m3/hr
max. steam
capacity
in kg/h
Temperature / rel. humidity of supply air
-15°C / 90%rh -5°C / 80%rh 5°C / 60%rh
5000 6600 8000 40
10000 13200 16000 80
15000 19800 24000 120
20000 26400 32000 160
25000 33000 40000 200
30000 39600 48000 240
Example:
Max. portion of supply air 10000 m3/h,
temperature/rel. humidity of supply air
-15°C/90%rh
Condair GS 80 C G20 RS

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Important notes:
– The required maximum steam capacity depends on the specific application and the installation.
The calculated steam capacity based on the above formulas, the h,x diagram and the condition of
the air to be humidified does not consider any steam loss (e.g. due to condensation in the steam
hoses and the steam distributors), any heat loss of the unit as well as any absorption or release
of humidity of materials located in the room being humidified.
In addition, the calculated steam capacity does not consider any losses caused by the draining
rate depending on the water quality.
The total amount of losses depends on the entire system and must be taken into consideration
when calculating the required steam capacity. If you have any questions regarding the calculation
of the steam capacity please contact your Condair supplier.
– For systems where the max. required steam capacity varies extensively (e.g. for test facilities or
for systems with variable air volume flow, etc.), please contact your Condair supplier.
4.1.2 Combustion gas
The Condair GS can be operated with natural gas or propane. The equipment is configured ex-
works for the respective combustion gas that is to be employed. If required, the equipment can be
converted at a later date to work with one of the other combustion gas.
Combustion gas Designation
Natural gas H, E, E(S) G20
Natural gas L, ELL G25
Natural gas HS G25.1
Natural gas Lw G27
Natural gas Ls GZ350
Propane gas P (Liquid gas) G31
Condair GS 80 C G20 RS
4.1.3 Combustion air supply
To ensure correct combustion, care must be taken to provide either a ventilation opening in the
room where the equipment is installed (room air-dependent device) or a separate air inlet pipe
(room air-independent device) so that an adequate supply of clean, fresh air, is available.
Equipment version Designation
Room air-dependent device
For rooms with a sufficiently large ventilation opening
and a source of clean intake air.
Caution! Local building regulations must be observed.
___
Room air-independent device (RS equipment)
Air supply through a separate pipe from outside the
building. For closed rooms, rooms with low air pressure
and rooms with dirty intake air.
RS
Condair GS 80 C G20 RS

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4.2 Selecting the control system
The various control systems
– System 1: Room humidity control
System 1 is suited for air conditioning systems with mainly recirculated air. The humidity sensor
is preferably located in the room itself or in the exhaust air duct.
A1/2 humidity sensor
B1 ventilation interlock
B2 airflow monitor
B3 safety humidistat
PIEexternal continuous controller (e.g. PI controller)
PIDIinternal continuous controller (PID controller)
Y input signal from A1
Z input signal from A2
A1 humidity sensor
B1 ventilation interlock
B2 airflow monitor
B3 safety humidistat
PIEexternal continuous controller (e.g. PI controller)
PIDIinternal continuous controller (PID controller)
Y input signal from A1
– System 2: Room humidity control with continuous limitation of the supply air humidity
System 2 is suited for air conditioning systems with a large portion of supply air, low supply air
temperature, post-humidification, or variable airflow volume. If the supply air humidity exceeds
the preset value, the continuous limitation is effected prior to the room humidity control.
The humidity sensor (A1) is preferably located in the exhaust air duct or in the room itself. The
humidity sensor (A2) for the limitation of the supply air humidity is located in the supply air duct
after the steam distribution pipe. This control system requires the internal PID controller or an
external continuous controller with the option to connect a second humidity sensor.
Attention! The continuous limitation of the supply air humidity is no substitute for the safety
humidistat.

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– System 3: Supply air humidity control with continuous output limitation
Supply air humidity control (humidity sensor installed in supply air duct) should be used only
where room humidity control is impracticable for technical reasons. Such systems always require
a PI-controller.
The humidity sensor (A1) is located in the supply air duct after the steam distribution pipe. The
humidity sensor (A2) for the continuous output limitation is located in the supply air duct before
the steam distribution pipe. Such a system requires the internal PID controller or an external PI-
controller with the option to connect a second humidity sensor.
A1/2 humidity sensor
B1 ventilation interlock
B2 airflow monitor
B3 safety humidistat
PIEexternal PI-controller
PIDIinternal continuous controller (PID controller)
Y input signal from A1
Z input signal from A2
Which humidity control system for which application?
Application Location of the humidity sensor
Room or exhaust air duct supply air duct
Air conditioning systems with:
Supply air portion up to 33% System 1 System 1
Supply air portion up to 66% System 1 or 2 System 2 or 3
Supply air portion up to 100% System 2 System 3
Supply air humidity control ––– System 3
Please contact your Condair supplier, if your application meets the following conditions:
– Humidification of small rooms up to 200 m3
– Air conditioning systems with a high number of air exchanges
– Systems with variable air volume flow
– Test facilities with extreme control accuracy requirements
– Rooms with a high variation in max. steam capacity
– Systems with temperature fluctuations
– Cold rooms and systems with dehumidification

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4.3 Options
At the moment no options are needed for the Condair GS.
4.4 Accessories
4.4.1 Accessories overview
Model Condair GS 40 ... 80 ... 120 ... 160 ... 200 ... 240 ...
Steam distribution pipe
(see accessory details in chapter 4.4.2)
81-...
number 1 2 3 4 5 6
OptiSorp steam distribution system
(see accessory details in chapter 4.4.2)
System 1 System 2 System 3 System 4 System 2
System 3
System 3
number 1 1 1 1 1 of each 2
Steam hose adapter ––– SA80
(3" / 2x 1 3/4")
SA120
(3" / 3x 1 3/4")
SA160
(4" / 4x 1 3/4")
SA200
(4" / 6x 1 3/4")
SA240
(4" / 6x 1 3/4")
number ––– 11111
Steam hose / meter DS80
number 1 2 3 4 5 6
Condensate hose / meter KS10
number 1 2 3 4 5 6
Filter valve Z261 (1 pc. per system)
Flue gas adapter with
condensate drain
FA40 FA80 FA120/160 FA200/240
number 1 1 1 1
Control/input signals
The Condair GS is regulated via the internal PID controller or an external continuous controller (e.g.
PI controller).
Important! For the control systems 2 and 3 the external controller must be equipped with two control
signal inputs.
The Condair GS processes the following control signals:
– 0 ... 10 VDC
– 2 ... 10 VDC
– 0 ... 10 mADC
– 2 ... 10 mADC
– 0 ... 20 mADC
– 4 ... 20 mADC
– 0 ... 5 VDC
– 1 ... 5 VDC
Further information is provided in Chapter 5.9.
Output signals
The Condair GS provides the following output signals:
– 10 VDC (max. 20 mA)
– Remote operating and fault signals (4 potential-free contacts)
Further information is provided in Chapter 5.9.

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OptiSorp Number of steam
connections
Max. steam capacity
in kg/h 1)
Duct dimensions
Width in mm Height in mm
System 1 1 45 (30) 450...4000 450...1650
System 2 2 90 (60) 450...4000 450...2200
System 3 3 135 (90) 450...4000 800...3200
System 4 4 180 (120) 450...4000 800...3200
1) For duct widths <600 mm the values in brackets apply
4.4.2 Accessory details
Steam distribution pipes
The steam distribution pipes are selected on the basis of the duct width (for horizontal installation)
or the duct height (for vertical installation) and the capacity of the steam humidifier.
Important! Always select the longest possible steam distribution pipe (optimum humidification dis-
tance).
Steam distribution pipes 1) for
GS 40, 80, 120, 160, 200 and 240
Duct width (B) Steam capacity
Type Length in mm (L) 2) in mm max. in kg/h 3)
81-350 350 400…600 30
81-500 500 600…750 30
81-650 650 750…900 50
81-800 800 900…1100 50
81-1000 1000 1100…1300 50
81-1200 1200 1300…1600 50
81-1500 1500 1600…2000 50
81-1800 1800 2000…2400 50
81-2000 2000 2200…2600 50
81-2300 2300 2500…2900 50
81-2500 2500 2700…3100 50
1) Material: CrNi steel
2) Special length on request
3) To fully exploit the overall capacity of your GS humidifier, the output of each
steam outlet may be fed to more than one distribution pipe. If more than one
steam distribution pipe is fed per steam outlet the steam line must be divided
into multiple branches. Appropriate fittings are available on request.
Note:If the humidification distance (see chapter 5.3.1) has to be reduced for technical reasons, the
steam output of your unit must be divided between two steam distribution pipes or the OptiSorp
steam distribution system must be used. If this is the case, contact your Condair supplier.
OptiSorp steam distribution system
The OptiSorp steam distribution system is used in ventilation ducts with a short humidification distance
(for the calculation of the humidification distance refer to chapter 5.3.1). When ordering an OptiSorp
system the duct dimension must be specified. Please consult the data in the following table.

19
5 Mounting and installation works
Qualification of personnel
All mounting and installation work must be performed only by adequately qualified personnel familiar
with the Condair GS. Ascertaining the qualifications is the customer‘s responsibility.
General notes
All the information contained in these installation, commissioning and service instructions relating to
equipment assembly and to gas, flue gas, water, steam and electrical installation must be uncondi-
tionally observed and complied with.
The local directives and regulations for the installation of gasfired equipment (Steam humidifiers)
must be unconditionally observed and complied with.
All local regulations relating to the execution of gas, flue gas, water, steam and electrical installations
must be observed and complied with.
Safety
The connection of the Condair GS to the mains electrical supply must not be made until all installa-
tion work has been completed.
Incorrectly executed installations can result in personal injury and/or damage to property through
explosions, fires, carbon monoxide poisoning, electric shock, etc. If you require assistance, please
contact a qualified installer, your local gas supplier or your Condair representative. In the installation
itself, use only materials available from your Condair representative and accessories approved by
him.
5.1 Important notes on mounting and installation works

20
5.2 Unit fitting
5.2.1 Humidifier location
The positioning of the Condair GS is largely dependent on the location of installation of the steam
distribution pipe (see Chapter 5.3.1) and on the details of the flue gas pipe (see Chapter 5.6) and the
air supply line (RS units only, see Chapter 5.7). To ensure proper functioning of the steam humidi-
fier and to obtain optimum efficiency, the following points must be considered and observed when
choosing the location for the steam humidifier:
– the local and national regulations for installation of gasfired equipment must be observed and
followed. The manufacturer accepts no liability for non-compliance with these regulations.
– Install the steam humidifier so that :
– the length of the steam hose is as short as possible (ideally 2 m, max. 4 m), the minimum
bend radius (R= 300 mm) and the minimum upslope (20 %) and the minimum downslope (5
%) of the steam hose can be maintained (see Chapter 5.3.2).
Note: Long steam lines reduce the maximum steam output of the humidifier, due to the heat
loss involved. The static pressure also increases.
– the flue gas pipe can be installed in accordance with the applicable local building and instal-
lation regulations.
– in the case of room air-independent units (RS units) the installation location can be reached
with an air supply line and good accessibility is assured.
– In the case of room air-dependent units care must be taken to provide an adequate intake of air
(in accordance with local building regulations).
For UK only: Please refer to BS 5440: Part II or BS 6644 when installing units. We draw your at-
tention especially to combustion an ventilation air supply requirements for plant rooms. Permanent
low and high level openings communicating directly with the outside air shall be fitted with grilles
having a total minimum free area as follows.
Free area grille sizes
Low level High level
GS 40 14,400 mm214,400 mm2
GS 80 55,800 mm227,900 mm2
GS 120 70,200 mm235,100 mm2
GS 160 84,600 mm243,300 mm2
GS 200 89,000 mm250,500 mm2
GS 240 113,400 mm257,700 mm2
The room air-independent humidifiers (RS units) do not require a separate ventilation opening,
since the combustion air required is provided by an air intake pipe from outside the building.
CAUTION!
Operation of the humidifier with unclean air can lead to safety problems and reduce the output
of the unit. Impurities in the air are, for example: Halogens, ammonia, chloride, excessive dust,
lime and dirt. For questions about air quality, please refer to the technical service department
of your Condair distributor
– The Condair GS gasfired steam humidifiers are designed for floor mounting on the unit stand
(included in the delivery) fixed to the floor.
– The sheet covering of the Condair GS heats up during operation(max. surface temperature approx.
60 - 70 °C). Therefore make sure that no heat-sensitive materials are placed in the immediate
vicinity of the humidifier.