Lochinvar CHA 155 PG CE Guide

These instructions must be read and understood before installing, commissioning, operating or maintaining the equipment.
IMPORTANT INFORMATION
0310569
March 2012
Installation, Commissioning, User & Maintenance Instructions
High Efficiency Water Heaters and Boilers
Charger
Direct Gas Fired Floor Standing Water Heater
with Automatic Pilot Ignition
Models:
CHA 100 G CE and PG CE
CHA 155
CHA
G CE and PG CE
200 G CE and PG CE
CHA 300 G CE and PG CE
CHA 400 G CE and PG CE
CHA 500 G CE and PG CE
CHA 600 G CE and PG CE
CHA 700 G CE and PG CE

Lochinvar Ltd
7 Lombard Way
The MXL Centre
Banbury
Oxon
OX16 4TJ
www.lochinvar.ltd.uk
High Efficiency Water Heaters and Boilers
Tel: [phone]
Fax: [phone]
Email: [e-mail]

Instruction manual CHA 3
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Read this manual carefully Warning
Read this manual carefully before starting the water heater. Failure to read
the manual and to follow the printed instructions may lead to personal injury and
damage to the water heater.
All rights reserved.
Nothing from this publication may be copied, reproduced and/or published by
means of printing, photocopying or by any means whatsoever without the prior
written approval of the supplier.
The supplier reserves the right to modify specifications stated in this manual.
Trademarks Any brand names mentioned in this manual are registered trademarks of their
respective owners.
Liability The supplier accepts no liability for claims from third parties arising from
unauthorised use, use other than that stated in this manual, and use other than
in accordance with the General Conditions registered at the Chamber of
Commerce.
Refer further to the General Conditions. These are available on request, free of
charge.
Although considerable care has been taken to ensure a correct and suitably
comprehensive description of all relevant components, the manual may
nonetheless contain errors and inaccuracies.
Should you detect any errors or inaccuracies in the manual, we would be
grateful if you would inform us. This helps us to further improve our
documentation.
Liability In the event of problems with your gas, electricity or water supply connections,
please contact the supplier/installation engineer of your installation.

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Instruction manual CHA 5
Table of contents
1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 7
1.1 About the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7
1.2 What to do if you smell gas- - - - - - - - - - - - - - - - - - - - - - - - - 7
1.3 Regulations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7
1.4 Target groups - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8
1.5 Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8
1.6 Notation conventions- - - - - - - - - - - - - - - - - - - - - - - - - - - - 9
1.7 Overview of this document - - - - - - - - - - - - - - - - - - - - - - - - - 9
2 Working principle of the water heater - - - - - - - - - - - - - 11
2.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11
2.2 General working principle of the water heater - - - - - - - - - - - - - - - 11
2.3 Water heater operating cycle - - - - - - - - - - - - - - - - - - - - - - - 13
2.4 Protection for the water heater - - - - - - - - - - - - - - - - - - - - - - 13
3 Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - 15
3.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15
3.2 Packaging - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15
3.3 Ambient conditions- - - - - - - - - - - - - - - - - - - - - - - - - - - - 16
3.4 Technical specifications - - - - - - - - - - - - - - - - - - - - - - - - - 18
3.5 Installation diagram - - - - - - - - - - - - - - - - - - - - - - - - - - - 21
3.6 Vented water connections - - - - - - - - - - - - - - - - - - - - - - - - 22
3.7 Unvented water connections - - - - - - - - - - - - - - - - - - - - - - - 23
3.8 Gas connection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 24
3.9 Flue gas discharge- - - - - - - - - - - - - - - - - - - - - - - - - - - - 25
3.10 Electrical connection - - - - - - - - - - - - - - - - - - - - - - - - - - - 26
3.11 Checking the supply pressure and burner pressure - - - - - - - - - - - - 29
4 Conversion to a different gas category - - - - - - - - - - - - 33
4.1 Conversion of CHA 100 to 600 to another gas category - - - - - - - - - - 34
4.2 Conversion of CHA 700 to another gas category - - - - - - - - - - - - - 36
4.3 Conversion from LP gas to natural gas - - - - - - - - - - - - - - - - - - 37
4.4 Conversion from natural gas to LP gas - - - - - - - - - - - - - - - - - - 39
5 Filling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 41
5.1 Filling unvented installations - - - - - - - - - - - - - - - - - - - - - - - 42
5.2 Filling vented installations - - - - - - - - - - - - - - - - - - - - - - - - 42
6 Draining - - - - - - - - - - - - - - - - - - - - - - - - - - - - 43
6.1 Draining unvented installations - - - - - - - - - - - - - - - - - - - - - - 44
6.2 Draining vented installations - - - - - - - - - - - - - - - - - - - - - - - 44
7 The control panel- - - - - - - - - - - - - - - - - - - - - - - - 45
7.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
7.2 Control panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
7.3 Explanation of icons - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
7.4 On/off switch- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
7.5 Control thermostat - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
7.6 Burner control reset button - - - - - - - - - - - - - - - - - - - - - - - - 46
7.7 Flue gas thermostat reset button - - - - - - - - - - - - - - - - - - - - - 46
7.8 Weekly timer circuit - - - - - - - - - - - - - - - - - - - - - - - - - - - 46
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Table of contents
6Instruction manual CHA
8 Status of the water heater - - - - - - - - - - - - - - - - - - - 47
8.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 47
8.2 Operating modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 47
8.3 Power Anode status- - - - - - - - - - - - - - - - - - - - - - - - - - - - 47
8.4 Error conditions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 48
9 Starting the water heater - - - - - - - - - - - - - - - - - - - - 49
9.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49
9.2 Starting the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - 49
9.3 The appliance's heating cycle - - - - - - - - - - - - - - - - - - - - - - - 49
10 Shutting down - - - - - - - - - - - - - - - - - - - - - - - - - 51
10.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51
10.2 Shut the appliance down for a brief period ('OFF' mode) - - - - - - - - - - 51
10.3 Isolating the appliance from the mains - - - - - - - - - - - - - - - - - - - 51
10.4 Shutting the appliance down for a long period - - - - - - - - - - - - - - - 51
11 Errors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53
11.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53
11.2 Error conditions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53
11.3 CHA Troubleshooting table for general errors - - - - - - - - - - - - - - - 54
11.4 CHA Troubleshooting table - no hot water - - - - - - - - - - - - - - - - - 55
11.5 CHA Troubleshooting table - Insufficient hot water - - - - - - - - - - - - - 57
12 Performing maintenance - - - - - - - - - - - - - - - - - - - - 59
12.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 59
12.2 Preparation for maintenance - - - - - - - - - - - - - - - - - - - - - - - 59
12.3 Water-side maintenance - - - - - - - - - - - - - - - - - - - - - - - - - 59
12.4 Gas-side maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - 61
12.5 Finalising maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - 62
13 Warranty (certificate) - - - - - - - - - - - - - - - - - - - - - - 63
13.1 Garantie (certificaat) - - - - - - - - - - - - - - - - - - - - - - - - - - - 63
13.2 Conditions for installation and use - - - - - - - - - - - - - - - - - - - - - 63
13.3 Exclusions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 64
13.4 Scope of the warranty - - - - - - - - - - - - - - - - - - - - - - - - - - - 64
13.5 Claims - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 64
13.6 Obligations of Lochinvar Ltd - - - - - - - - - - - - - - - - - - - - - - - - 64
14 Electrical diagram - - - - - - - - - - - - - - - - - - - - - - - 65
14.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 65
15 Declaration of Conformity - - - - - - - - - - - - - - - - - - - 71

Instruction manual CHA 7
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1 Introduction
1.1 About the appliance This manual describes how to install, service and use the CHA appliance. The
CHA appliance is a gas-fired open boiler without fan. These Charger devices
have a pilot flame ignition feature and flue gas discharge safety device
The CHA is an appliance of type B11BS.
The information in this manual applies to types: CHA 100, CHA 155, CHA 200,
CHA 300, CHA 400, CHA 500, CHA 600 and CHA 700.
The water heater has been manufactured and equipped in accordance with the
European standard for gas-fired storage water heaters for the production of
domestic hot water (EN 89). The water heaters are therefore compliant with the
European Directive for Gas water heaters, and and are entitled to bear the CE
mark.
Warning
Read this manual carefully before starting the water heater. Failure to read
the manual and to follow the printed instructions may lead to personal injury and
damage to the water heater.
1.2 What to do if you
smell gas
Warning
If you smell gas:
No naked flames! No smoking!
Avoid causing sparks! Do not use any electrical equipment or switch, i.e. no
telephones, plugs or bells!
Open windows and doors!
Shut off the mains gas supply valve!
Warn occupants and leave the building!
After leaving the building, alert the gas distribution company or your installation
engineer.
1.3 Regulations As the (end) user, installation engineer or service and maintenance engineer,
you must ensure that the entire installation complies, as a minimum, with the
official local:
• building regulations;
• energy supplier's directives for existing gas installations;
• directives and technical guidelines for natural gas installations;
• safety requirements for low-voltage installations;
• regulations governing the supply of drinking water;
• regulations governing ventilation in buildings;
• regulations governing the supply of air for combustion;
• regulations governing the discharge of products of combustion;
• requirements for installations that consume gas;
• regulations governing indoor waste water disposal;
• regulations imposed by fire service, power companies and municipality.
0063

Introduction
8Instruction manual CHA
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Furthermore, the installation must comply with the manufacturer's instructions.
Comment
The installation is also subject to any later amendments and/or additions to
all regulations, requirements and guidelines published on or prior to the moment
of installation.
1.4 Target groups The three target groups for this manual are:
• (end) users;
• installation engineers;
• service and maintenance engineers.
Symbols on each page indicate the target groups for whom the information is
intended. See the table.
Target group symbols
Note
This water heater is not intended for use by persons with reduced physical,
sensory or mental capacities, or who lack the necessary experience or
knowledge, unless the person responsible for their safety is supervising them or
has explained to them how the water heater should be used.
Note
This water heater is not intended to be used by children. Always supervise
children, and ensure that they do not play with the water heater.
1.5 Maintenance A service should be carried out at least once a year, both on the water side and
on the gas side. Among other things, the service interval depends on the water
quality, the average burning time per day and the set water temperature.
Comment
To determine the correct service interval, it is recommended to arrange for
the service and maintenance engineer to check the water heater on both the
water and gas side within three months following installation. Based on this
check, the best service interval can be determined.
Comment
Regular maintenance extends the service life of the water heater.
Both the end user and the service and maintenance engineer are responsible
for regular maintenance. They will need to establish clear agreements on this.
Comment
If the water heater is not regularly serviced, the warranty will become void.
Symbol Target Group
(End) user
Installation engineer
Service and maintenance engineer

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1.6 Notation
conventions
The following notation is used in this manual:
Comment
Important information.
Note
Ignoring this information can lead to the water heater being damaged.
Warning
Failure to carefully read this information may lead to danger of personal
injury, and serious damage to the water heater.
1.7 Overview of this
document
The table provides an overview of the contents of this document.
Contents of this document
Chapter Target groups Description
Working principle of the water
heater
This chapter describes the working principle of the water
heater.
Installation This chapter describes the installation activities to be
carried out before final commissioning.
Conversion to a different gas
category
This chapter describes how to convert the water heater to
a different gas category and/or family of gases.
Filling This chapter describes how to fill the water heater.
Draining This chapter describes how to drain the water heater.
The control panel This chapter describes the appliance's control panel, and
how to use it.
Status of the water heater This chapter describes the status (mode or condition) that
the water heater may have, and possible actions to take.
Starting the water heater This chapter describes how to start the water heater. The
general operating cycle of the water heater is also
described.
Shutting down This chapter describes how to decommission the water
heater for a brief or long period of time.
Errors This chapter is mainly intended for the installation
engineer and the service and maintenance engineer. It
describes appliance errors. A troubleshooting table of
possible features, causes and solutions is provided. End
users may also refer to this chapter for additional
information about the appliance.
Performing maintenance This chapter sets out the maintenance tasks to be carried
out.
Warranty (certificate) This chapter states the warranty terms and conditions.

Introduction
10 Instruction manual CHA
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Instruction manual CHA 11
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2 Working principle of
the water heater
2.1 Introduction This chapter covers the following topics:
•General working principle of the water heater;
•Water heater operating cycle;
•Protection for the water heater;
•Safety of the installation.
2.2 General working
principle of the water
heater Cut-away view of the water heater
Legend
Unused numbers are not applicable
2. hot water outlet
6. control panel
8. combustion chamber
9. anode
10. tank
11. heat exchanger
12. inspection and cleaning
opening
14. cold water inlet
15. drain valve
16. gas control valve
20. hot surface igniter
21. flame probe
22. chimney flue
24. insulation layer
33. draught diverter
34. flue gas thermostat sensor
35. radiation shield/condensation
tray
36. bar burners/burner tray
37. flue gas thermostat
38. safety thermostat sensor
39. high-limit thermostat sensor
40. burner control
41. control thermostat
42. high-limit thermostat
43. safety thermostat
44. frost thermostat
45. control thermostat sensor
46. frost thermostat sensor
22
33
9
11
24
10
12
15
8
35
16
34
37
2
38
6
40
42
43
46
14
20
21
36
44
45
41
39
IMD-1038 R0

Working principle of the water heater
12 Instruction manual CHA
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In this appliance, the cold water enters the bottom of the tank through the cold
water inlet (14). The heat of combustion is conducted to the water by the
combustion chamber (8) and flue tubes. The heated tap water leaves the tank
through the hot water outlet (2). Once the appliance is completely filled with
water, it will constantly be under mains water pressure. When hot water is drawn
from the appliance, it is immediately replenished with cold water.
The gas required for combustion flows via the gas control (16) into the manifold.
There are orifices in the manifold. The gas is injected into the burner bars at
pressure from these orifices (36). The burner bars together form the burner tray.
The injection of gas into the burner bars also draws in the primary air required
for combustion. The narrow opening in the orifice causes the gas flow to
accelerate. This in turn causes a partial vacuum. It is this partial vacuum that
draws in the air (the Venturi effect). Additional air is drawn in through the
opening in the burner tray.
The hot surface igniter (20) ensures ignition of the gas/air mixture.
The flue gases released by this combustion are led through the flue tubes of the
heat exchanger (11). Flue baffles are fitted inside the flue tubes. These retard
the flow of the flue gases, thereby increasing the thermal efficiency of the
appliance.
The flue gases are exhausted from the appliance via the draught diverter (33).
A radiation shield/condensation tray (35) is mounted below the burner tray. This
prevents overheating of the floor area below the appliance, as well as serving
as a collection tray for condensation water.
The insulation layer (24) prevents heat loss. The inside of the tank is enamelled
to protect against corrosion. The anodes (9) offer extra protection.

Instruction manual CHA 13
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2.3 Water heater
operating cycle The entire appliance is controlled by the burner control (40) and the control
thermostat (41) or frost thermostat (44). The control thermostat and frost
thermostat both independently measure the water temperature (Twater). The
appliance's heating cycle is activated as soon as Twater falls below the specified
threshold value (Tset). The value of Tset depends on the selected appliance
operating mode (8.2 "Operating modes"). If the appliance is in the 'OFF' mode
(frost protection), then this value is determined by the frost thermostat
(threshold value = 20°C). If the appliance is in the 'ON' mode, then the threshold
value is selectable via the control thermostat (±40°C to ±70°C).
As soon as Twater falls below Tset, the relevant thermostat (control or frost) will
close, and the burner control will register demand. The gas control (16) is
opened, and the gas is mixed with air. This mixture is ignited by the hot surface
igniter (20) and the water is heated. As soon as Twater gets higher than Tset, the
thermostat opens again. The demand will cease, and the burner control will stop
the heating cycle.
The thermostats have a certain margin both when closing and opening. We refer
to this margin as the hysteresis. The hysteresis cannot be adjusted.
2.4 Protection for the
water heater
2.4.1 Introduction
The burner control monitors the water temperature by means of thermostats
and ensures safe combustion. This is done by:
•theWater temperature protection device;
•theFlue gas backflow safeguard;
•theFlame probe;
2.4.2 Water temperature protection
By means of the frost, high-limit and safety thermostats, the burner control
monitors three temperatures that are important for safety. The table explains the
working principle of the thermostats with sensors.
Temperature protection
2.4.3 Flue gas backflow safeguard
The flue gases are discharged to the outside via the draught diverter (33) and
the flue (22). To prevent the flue gases from flowing back into the boiler room,
the discharge ducting is monitored by a feature called the Thermal Reflux
Safeguard (TRS). This uses a flue gas thermostat (37) with a flue gas
thermostat sensor (34) that are located in the draught diverter. Under normal
circumstances this sensor will register the ambient temperature.
Protection Description
Frost thermostat When the frost thermostat sensor (46) measures a temperature of 20°C or
less, the heating cycle (2.3 "Water heater operating cycle") will start.
High-limit thermostat When the high-limit thermostat sensor (39) measures a temperature higher
than 84°C, the high-limit thermostat will open. The heat demand is terminated
and the burner control halts the heating cycle until the high-limit thermostats
close once more. At that moment the burner control will reset the appliance and
the heating cycle will restart. The high-limit safeguard serves to prevent
overheating and/or excessive formation of scale in the appliance.
Safety thermostat When the safety thermostat sensor (38) measures a temperature higher than
93°C, the safety thermostat will open. The heat demand is terminated and the
burner control will immediately halt the heating cycle. The burner control will go
into a lockout error state. This must be manually reset before the appliance can
resume operation.

Working principle of the water heater
14 Instruction manual CHA
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However, if the chimney is not drawing sufficiently (for example, due to a
blockage in the chimney), the flue gases will 'reflux' and flow back past the flue
gas thermostat sensor. The sensor will then detect an excessive temperature
and the flue gas thermostat will open. The demand will cease, and the burner
control will immediately stop the heating cycle. The flue gas thermostat will also
lock out. It must be manually reset before the appliance can resume operation .
2.4.4 Flame probe
To ensure that no gas can flow when there is no combustion, the water heater
is fitted with a flame probe (21). The burner control uses the ionisation-detecting
properties of this probe for flame detection. The burner control closes the gas
valve the instant it determines that there is a gas flow but no flame is present.
2.4.5 Safety of the installation
In addition to the appliance's standard built-in safety monitoring, the appliance
must also be protected by an expansion vessel, expansion valve, pressure
reducing valve, non-return valve and a T&P valve.
The use of an expansion vessel, expansion valve and/or pressure reducing
valve depends on the type of installation: unvented or vented.
Unvented installation
With an unvented installation, an expansion valve valve and expansion vessel
prevent the buildup of excessive pressure in the tank. This prevents damage
being caused to the enamelled coating (in the appliance) or to the tank. A non-
return valve prevents excessive pressure buildup in the water supply system.
This valve also prevents water from flowing backwards from the tank into the
cold water supply system. The pressure reducing valve protects the installation
against an excessively high water supply pressure (> 8 bar). These components
are fitted to the cold water pipe (3.6 "Vented water connections").
Vented installation
With vented installation, excess pressure is taken up by the open cold water
head tank. The head height of the tank determines the working pressure in the
water heater, which may not exceed 8 bar. The installation must also be fitted
with a vent pipe from the hot water pipe (3.6.3 "Hot water side"), which opens
into the cold water tank.
T&P valve
A T&P valve is only mandatory in an unvented installation. However, the
supplier also recommends the use of a T&P valve in vented installations.
A T&P (Temperature and Pressure Relief) valve monitors the pressure in the
tank and the water temperature at the top of the tank. If the pressure in the tank
becomes excessive (> 10 bar) or the water temperature is too high (> 97°C), the
valve will open. The hot water can now flow out of the tank. Because the
appliance is under water supply pressure, cold water will automatically flow into
the tank. The valve remains open until the unsafe situation has been rectified.
The appliance is fitted standard with a connecting point for a T&P
valve (3.7.3 "Hot water side").

Instruction manual CHA 15
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3 Installation
Warning
The installation must be carried out by an approved installation engineer in
compliance with the general and local regulations imposed by the gas, water
and power supply companies and the fire brigade.
The appliance may only be installed in a room that complies with the
requirements stated in national and local ventilation
regulations (1.3 "Regulations").
3.1 Introduction This chapter describes the installation activities to be carried out before the
appliance may be started up (9 "Starting the water heater"), in particular:
•Packaging;
•Ambient conditions;
•Technical specifications;
•Vented water connections;
•Vented water connections;
•Gas connection;
•Flue gas discharge;
•Electrical connection;
•Checking the supply pressure and burner pressure.
For a possible conversion to a different gas category, see
conversion (4 "Conversion to a different gas category").
3.2 Packaging To avoid damaging the water heater, remove the packaging carefully.
We recommend unpacking the water heater at or near its intended location.
Note
The water heater may only be manoeuvred in an upright position. Take care
that the water heater is not damaged after unpacking.

Installation
16 Instruction manual CHA
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3.3 Ambient conditions Note
The water heater may not be used in rooms where chemical substances are
stored or used due to the risk of explosion, and corrosion of the water heater.
Some propellants, bleaching agents and degreasing agents etc. disperse
vapours that are explosive and/or cause accelerated corrosion. If the water
heater is used in a room in which such substances are present, the warranty will
be void.
CHA appliances are open appliances and may only be installed in an open
boiler room. They are type B11BS.
3.3.1 Air humidity and ambient temperature
The boiler room must be frost-free, or be protected against frost. The table
shows the ambient conditions that must be adhered to for correct functioning of
the electronics present in the water heater to be guaranteed.
Air humidity and ambient temperature specifications
3.3.2 Maximum floor load
Allow for the appliance's weight with respect to the maximum floor load; refer to
the table.
Weight of the appliance filled with water
Air humidity and ambient temperature
Air humidity max. 93% RH at +25°C
Ambient temperature Functional: 0 < T < 60°C
Weight (kg) of the appliance filled with water
CHA 100 507
CHA 155 507
CHA 200 510
CHA 300 581
CHA 400 576
CHA 500 525
CHA 600 526
CHA 700 584

Instruction manual CHA 17
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3.3.3 Working clearances
For access to the appliance, it is recommended that the following clearances
are observed (see figure):
• AA: around the appliance's control column and cleaning openings: 100 cm.
• BB: all sides of the appliance: 50 cm.
• Above the appliance (room to replace the anodes):
- 100 cm if using fixed anodes, or
- 50 cm if using flexible anodes.
If the available clearance is less than 100 cm, flexible magnesium anodes
may be ordered.
Comment
When installing the appliance, be aware that any leakage from the tank
and/or connections can cause damage to the immediate environment or floors
below the level of the boiler room. If this is the case, the appliance should be
installed above a wastewater drain or in a suitable metal leak tray.
The leak tray must have an appropriate wastewater drain and must be at least
5cm deep with a length and width at least 5cm greater than the diameter of the
appliance.
Working clearances
AA
AA
AA
B
B
IMD-0275 R2

Installation
18 Instruction manual CHA
3is
3.4 Technical
specifications
The water heater is supplied without accessories. Check the
dimensions (3.4 "Technical specifications"), gas data (3.4.3 "Gas data") and
other specifications (3.4.2 "General and electrical specifications") of any
accessories you plan to use.
3.4.1 Dimensions of the water heater
Plan and elevation of the water heater
Legend
See the table.
A
B
M
R
K
P
S
N
6
1
3
4
6
25
10º
37º 45º
E
G
IMD-0145 R3

Instruction manual CHA 19
is
Dimensions (all measurements in mm unless otherwise indicated)
3.4.2 General and electrical specifications
General and electrical specifications
CHA
100
CHA
155
CHA
200
CHA
300
CHA
400
CHA
500
CHA
600
CHA
700
A) Overall height 1910 1910 1890 2155 2155 1950 2145 2145
B) Height of top of appliance 1700 1700 1700 1900 1900 1735 1810 1810
D) Diameter of appliance 710 710 710 710 710 710 710 710
F) Width 800 800 800 800 800 800 800 800
G) |Chimney flue outlet diameter 130 130 150 180 180 200 250 250
K) Gas connection height 145 145 145 145 145 145 145 145
M) Cold water supply height 505 505 505 505 505 515 590 590
N) Hot water outlet height 1545 1545 1545 1750 1750 1580 1655 1655
P) Height of cleaning opening 670 670 670 670 670 680 765 795
R) Height of drain valve connection 440 440 440 455 455 465 540 535
S) Height of T&P valve connection 1490 1490 1490 1700 1700 1700 1600 1600
1) Cold water supply connection (external) R11/2R11/2R11/2R11/2R11/2R11/2R11/2R11/2
2) Hot water outlet connection (internal) Rp11/2Rp11/2Rp11/2Rp11/2Rp11/2Rp11/2Rp11/2Rp11/2
3) Gas control connection (internal) Rp3/4Rp3/4Rp3/4Rp3/4Rp3/4Rp3/4Rp3/4Rp1
4) Drain valve connection (internal) Rp11/2Rp11/2Rp11/2Rp11/2Rp11/2Rp11/2Rp11/2Rp11/2
5) T&P valve connection (internal) 1-11.5
NPT
1-11.5
NPT
1-11.5
NPT
1-11.5
NPT
1-11.5
NPT
1-11.5
NPT
1-11.5
NPT
1-11.5
NPT
6) Cleaning/inspection opening Ø 100 Ø 100 Ø 100 Ø 100 Ø 100 Ø 100 Ø 100 Ø 100
DESCRIPTION CHA
100
CHA
155
CHA
200
CHA
300
CHA
400
CHA
500
CHA
600
CHA
700
Capacity (litres) 309 309 298 357 335 278 253 252
Maximum operating pressure (bar) 8 8 8 8 8 8 8 8
Empty weight (kg) 198 198 212 224 241 247 273 332
Heating time dT = 45oC (minutes) 38 30 23 25 17 11 8 7
Number of anodes 2 2 2 2 3 3 4 4
Number of bar burners/orifices 3 3 4 4 7 7 9 6
Number of flue tubes/flue baffles 5 5 7 6 9 12 16 17
Electrical power consumption (W) 30 30 30 30 30 30 30 60
Supply voltage
(-15% +10% VAC)
230 230 230 230 230 230 230 230
Mains frequency (±1Hz) 50 50 50 50 50 50 50 50
IPclass 30 30303030303030

Installation
20 Instruction manual CHA
3is
3.4.3 Gas data
Gas data
Description II2H3+ Unit CHA
100
CHA
155
CHA
200
CHA
300
CHA
400
CHA
500
CHA
600
CHA
700
2H: G20 - 20 mbar
Orifice diameter mm 2.90 3.20 3.20 3.30 2.95 3.20 3.30 3.90
(1) = Blank plate
(2) = Burner pressure regulator
(3) = High/low regulator
1,2or32 2222222
Nominal load (gross calorific
value)
kW 33.9 42.1 53.4 59.9 83.2 102.5 128.4 142.4
Nominal output kW 25.6 31.9 40.4 45.3 62.9 77.6 97.1 107.7
Supply pressure mbar 20 20 20 20 20 20 20 20
Burner pressure mbar 8.5 8.6 7.8 8.5 8.5 9.2 7.8 11.5
Gas consumption (*) m3/h 3.2 4.0 5.1 5.7 7.9 9.8 12.2 13.6
General 3+
Injector orifice diameter mm 1.60 1.70 1.60 1.75 1.50 1.70 1.75 2.25
(1) = Blank plate
(2) = Burner pressure regulator
(3) = High-low control
1,2or31 1111113
G30 - 30 mbar (butane)
Nominal load (gross calorific
value)
kW 33.9 42.2 53.4 59.2 80.8 100.1 127.5 140.3
Nominal output kW 26.3 32.7 41.4 45.9 62.6 77.6 98.8 108.8
Supply pressure mbar 30 30 30 30 30 30 30 30
Burner pressure (†) mbar- -------
Gas consumption (*) kg/h 2.5 3.1 3.9 4.3 5.9 7.3 9.3 10.2
G31 - 37 mbar (propane)
Nominal load (gross calorific
value)
kW 33.1 41.4 52.8 58.2 78.4 98.3 125.5 136.2
Nominal output kW 25.6 32.0 40.8 45.0 60.6 75.9 97.0 105.2
Supply pressure mbar 37 37 37 37 37 37 37 37
Burner pressure (†) mbar- -------
Gas consumption (*) kg/h 2.4 3.0 3.8 4.2 5.6 7.0 9.0 9.7
(*) Based on 1013.25 mbar and 15 °C.
(†) If using a blank plate instead of a burner pressure regulator, it is assumed that the burner pressure is equal
to the supply pressure. In practice, however, the burner pressure will be lower.