Dettson Hydra Compact HYDRAC03-E2401M Quick start guide

ELECTRIC BOILER
ELECTRONIC CONTROL
2015-06-09
X40203 Rev.E
HYDRA
COMPACT
www.dettson.ca
HYDRAC03-E2401M
HYDRAC04-E2401M
HYDRAC05-E2401M
HYDRAC06-E2401M
HYDRAC07-E2401M
HYDRAC08-E2401M
HYDRAC09-E2401M
HYDRAC10-E2401M
HYDRAC11-E2401M
HYDRAC12-E2401M
Models:
Installation Instructions
and Homeowner’s Manual
Dettson Industries Inc
Manufactured by:
Sherbrooke, Qc, Canada
Attention
Do not tamper with the unit
or its controls. Call a
qualified service technician.
Printed in Canada on 100% recycled paper
INSTALLER / SERVICE TECHNICIAN :
Use the information in this manual for the installation / servicing of the
boiler and keep the document near the unit for future reference.
HOMEOWNER :
Please keep this manual near the boiler for future reference.
c

2
TABLE OF CONTENT
SECTION 1 : INSTALLATION.........................................................................................................................................................................................3
1) DANGER, WARNING AND CAUTION.............................................................................................................................................................3
2) HEATING WITH HOT WATER.........................................................................................................................................................................3
3) DELIVERY........................................................................................................................................................................................................3
4) INSTALLATION................................................................................................................................................................................................3
Positioning..............................................................................................................................................................................................................3
5) CLEARANCES.................................................................................................................................................................................................4
6) DISTRIBUTION SYSTEM................................................................................................................................................................................4
7) INSTALLATION OF THE BOILER ...................................................................................................................................................................5
8) ELECTRIC POWER SUPPLY..........................................................................................................................................................................6
1. CONNECTING THE CIRCULATING PUMP ...............................................................................................................................................6
2. CONNECTING THE THERMOSTAT ..........................................................................................................................................................6
3. CONNECTING THE OUTDOOR SENSOR ................................................................................................................................................6
SECTION 2 : OPERATION .............................................................................................................................................................................................6
1) ADJUSTMENTS AND START-UP ...................................................................................................................................................................6
2) MECHANICAL HIGH LIMIT..............................................................................................................................................................................6
3) ELECTRONIC CONTROL................................................................................................................................................................................7
SECTION 3: MAINTENANCE.......................................................................................................................................................................................10
SECTION 4 : INFORMATION.......................................................................................................................................................................................10
SECTION 5 : TECHNICAL DATA .................................................................................................................................................................................11
LIST OF FIGURES
Figure 1: Mounting configurations...................................................................................................................................................................................4
Figure 2: Boiler components ...........................................................................................................................................................................................5
Figure 3: Navigation in menus ........................................................................................................................................................................................8
Figure 4: Modulation in function of the exterior temperature...........................................................................................................................................9
Figure 5: Boiler Dimensions..........................................................................................................................................................................................11
Figure 6: Typical Diagram of a Single Zone Installation................................................................................................................................................12
Figure 7: Multizone Diagram with more than one Circulator.........................................................................................................................................12
Figure 8: Multizone diagram with Motorized Valves......................................................................................................................................................13
Figure 9: Electrical Diagram..........................................................................................................................................................................................13
Figure 10: Exploded Vue...............................................................................................................................................................................................14
LIST OF TABLES
Table 1: Minimum clearances to combustible materials .................................................................................................................................................4
Table 2: Hydra Compact –Technical specifications.....................................................................................................................................................11
Table 3: parts List..........................................................................................................................................................................................................15

3
SECTION 1 : INSTALLATION
1) DANGER, WARNING AND CAUTION
The words DANGER, WARNING and CAUTION are used to identify
the levels of seriousness of certain hazards. It is important that you
understand their meaning. You will notice these words in the manual
as follows:
DANGER
Immediate hazards which WILL result in death or serious injury.
WARNING
Hazards or unsafe practices which CAN result
in death or injury.
CAUTION
Hazards or unsafe practices which CAN result in
personal injury, product or property damage.
2) HEATING WITH HOT WATER
Your HYDRA COMPACT electric boiler was carefully assembled
and checked in our plant, so that it will deliver warmth and comfort to
your home for many years to come.
This manual is intended to provide the necessary information for the
installation of the unit, how it functions and explains security
measures which are particular to this type of equipment.
It is essential that the persons installing, operating or adjusting the
boiler carefully read this manual, in order to completely understand
and be familiar with the procedures to be followed.
Any questions relative to the operation, maintenance or guarantee
should be directed to the company where the equipment was
purchased.
Upon completion of the installation, this manual should be placed
back into its original envelope and kept near the boiler for future
reference.
3) DELIVERY
Upon delivery of the boiler, check the nameplate to be sure that
you have received the model with the correct rating and proper
voltage.
The following items are supplied with the unit:
- A pressure relief valve, adjusted to 30 psi;
- A drain valve;
- An exterior probe for modulation;
- A ¼” NPT cap to cork the ¼” NPT nipple between the
elements in the case the boiler is installed
horizontally;
- A ¼‘’ NPT coupling for the installation of the air vent
if unit is installed upright position;
- Two 1” x ¾” reducers for the pressure relief valve
and the drain valve.
4) INSTALLATION
WARNING
The installation of this unit must be performed
by a qualified technician and it must conform
to the standards and regulations in force as
well as the Canadian Installation Code for
Hydronic Heating Systems CSA B214-01.
Positioning
The unit must be installed in an area that is dry, non-corrosive,
without excessive dust, well ventilated and where the ambient
temperature does not exceed 27oC (80oF).
The boiler must be installed using the mounting brackets that are
included. Before all, unfold the four lugs at the back of the unit. First,
position the upper support, hang the boiler, then fix the down
support. Finally, use the included self-tapping screws to fix the unit
to the wall brackets with the lugs.
The boiler can be installed in 5 possible configurations as shown in
figure 2.
Ensure that it is installed level and that the clearances indicated in
Table 1 are respected.

4
Figure 1: Mounting configurations
5) CLEARANCES
The following clearances should be provided for the servicing of the
unit:
Table 1: Minimum clearances to combustible
materials
LOCATION
CLEARANCE
Access side to elements
13 ¼‘’ (34 cm)
Sides
4’’ (10 cm)
Bottom
0
Front*
0
Back
0
* If the boiler is in an enclosure, provide a door or a removable panel
in front to access the control panel.
6) DISTRIBUTION SYSTEM
The proper functioning of your heating system is directly related to
the quality of the plumbing installation. Therefore, the entire
installation must be performed by qualified technicians.
See Figure 2 for the functions of the various boiler components.
The heating system must be set-up to operate at a maximum
pressure of 28 psi and the operating temperature may range from
5oC to 88oC (41oF to 190oF).

5
Figure 2: Boiler components
Freeze protection (when required)
WARNING
Only propylene glycol may be used in this
hydronic heating system, to prevent freezing.
It is recommended to add a maximum of 50%
of propylene glycol mixture to ensure proper
operation.
Do not use automotive anti-freeze, ethylene
glycol or any undiluted anti-freeze.
If the above recommendations are not
followed, severe personal injury, death or
substantial property damage can result.
All installations must include the following items:
a. 1 pressure regulator, adjusted to 12 psi, must be installed
between the boiler and the main water supply in the building;
b. 1 expansion tank, pre-pressurized to 12 psi and of appropriate
size;
c. 1 or more automatic air purge valves;
d. 1 or more circulating pumps of appropriate capacity.
CAUTION
To avoid water damage and/or scalding due to relief
valve operation, a discharge line must be connected to
the valve outlet and run to a drainage area. The
discharge line shall be installed in such a way that it
will allow for the complete drainage of the valve and
the discharge line.
7) INSTALLATION OF THE BOILER
At the time of installation, the following steps should be followed.
Refer to Figure 5,6,7,8 and 9.
1. Choose an appropriate location. Mount the boiler securely on
the wall, with the help of the mounting plate. Ensure that it is
level and that the minimum clearances are observed;
2. Install the drain valve and the safety valve according to the
mounting configuration as shown in Figure 1;
3. An air vent should be installed on the unit if installed upside
position, water connections at the bottom. In such case, use
the 3/8’’ NPT to ¼’’ NPT reducer, which is provided; In all other
mounting position, cork the hole with the ¼’’ plug provided.
4. Install the water supply and return piping with the 1” NPT fitting;
5. The heating supply line must include:

6
a. 1 circulator along with 2 maintenance valves;
b. 1 automatic pressure reducing valve adjusted to 12 psi,
with a shut-off valve on the return water line;
c. 1 expansion tank;
d. 1 automatic vent.
6. In order to ensure satisfactory water flow, the friction in the
piping system must not exceed the capacity of the circulator;
7. After having completed all piping connections, run water
through the system and purge the air. The automatic vent
should be in operation.
Warning: Remove the plastic cover and check to see if the elements
are watertight.
8) ELECTRIC POWER SUPPLY
All electrical wiring must conform to the standards and regulations in
force and the Canadian Electrical Code CSA C22.1.
Electrical power to the boiler must come from a 120/240V 60 Hz or
208V 60 Hz, single phase, 3-wire, grounded circuit, protected by an
appropriately sized breaker, based on the total rating of the boiler.
When using 208V, change the connector’s position at the primary of
the transformer. Refer to the boiler nameplate and the technical
specifications in this manual to select the proper breaker and wire
size.
WARNING
Risk of fire.
The conductor sizing must conform to the last
edition of the local or national codes.
Failure to follow this rule can result in death,
bodily injury and/or property damage.
Power supply to the unit can be made using copper or aluminium
wires. The wire size must be decided in accordance to unit power
consumption, the over current protection type and capacity, the wire
type and length, and the environment where the unit is installed. If
an aluminium wire is used, other precautions (such as the use of a
DE-OX inhibitor) must be taken to insure the conformity of the
installation. In all cases, all the factors affecting the wire gauge
must be considered and the installation codes followed.
The exterior of the unit must have an uninterrupted ground to
minimize the risk of bodily harm. A ground terminal is supplied with
the control box for that purpose.
In the event that wires inside the unit require replacement, these
must be as same type as originals. (Copper wiring only)
1. CONNECTING THE CIRCULATING PUMP
Connect the circulating pump on 120V connections points identified
P-P in the control panel as shown in Figure 2. The electronic control
is designed to operate the circulator on thermostat demand, with a
heat purge delay at the end of heating cycle or continuous flow.
Refer to the electronic control section to learn how to configure this
function.
2. CONNECTING THE THERMOSTAT
Single heating zone
Connect the low voltage thermostat to R-W terminals located inside
the control panel. See Figure 4.
Multiple heating zones
Connect the contacts of the motorized valves or pump controls to R-
W terminals inside the control panel. See Figure 5 and 6.
3. CONNECTING THE OUTDOOR SENSOR
Mount the sensor on an outside wall, protected from direct sunlight,
so that it will accurately measure the outside temperature. Install 2
only #20 wires between the outdoor sensor and the terminals
identified as S-EXT and S-EXT inside the control panel of the boiler.
SECTION 2 : OPERATION
1) ADJUSTMENTS AND START-UP
CAUTION
The boiler must be filled with water and all air
purged from the system, before turning on the
power.
CAUTION
If the power is turned on before the boiler is filled
with water, the elements will become seriously
damaged.
1. Turn on the power,
2. Adjust the set point of the boiler on the electronic control. See
control section for adjustments.
3. Set the thermostat at 30°C (85°F). The circulator should start
as well as the electrical elements in sequence with a 12
seconds delay;
4. The circulator stays on for as long as there is a call for heat
except if differently configured on the electronic control.
2) MECHANICAL HIGH LIMIT
Mechanical High Limit Control
The mechanical limit aquastat must be set 30oF above the set point
temperature on the electronic control.
Manual reset high limit control
Disconnect the unit before resetting the high limit. The manual reset
high limit is set at 100°C (212°F). To reset this protection, the boiler
needs to cool down. Then the red button shall be pressed using a
pen or screwdriver.

7
3) ELECTRONIC CONTROL
Display and electrical controller:
Pump: Shows the state of the pump.
Set P: Indicates the temperature set point.
Target: Indicates the target temperature.
T° in: Temperature inside of the device.
T° out: Temperature outside of the
device
Cmd: Indicates the percentage of
power sent to the elements
From this screen and by pressing the
directional buttons, the user can switch from the various menus
available and press the central button to access the desired menu.
These menus are the consumption menu, the alarm menu, the
configuration menu and the installer menu.
Consumption:
The consumption menu shows an approximated value of the power
consumed by the boiler since it was last reset.
Consumption is written in kilowatt
hour and time since last reset is given
in hours or in days.
As shown on the screen, pressing the
central button will reset the time and
power consumed.
Alarm:
Some events may alter the functionality of the device in an
undesired manner. These events trigger alarms in the system that
remains stored in the device’s memory. Reasons for alarms are:
troubles with the internal or the external heat sensor, problems with
elements and overheating.
In case of alarm, the controller’s screen will be illuminated by a
flashing red light. It is strongly advised that you tell an installer about
this issue.
Using the left and right buttons, the arrow on the screen can be
moved and the central button will allow the user to activate the
element pointed by it.
Current: Indicate the alarms
currently afflicting the device.
Past: Shows a history of the alarms
triggered on the device.
Clear alarm: Ends alarms that still
appear active on the device.
The past alarm function allows you to
revisit the previous 25 alarm messages
and an approximated time span since
they happened. The arrow buttons
allow the user to scroll through the
alarm reports and the central button
allows them to return to the alarm
menu.
Configuration:
The configuration menu’s purpose is to allow the user to adjust
settings linked to the interface, such as the temperature’s units and
the language.
Units: allows switching between
Fahrenheit and Celsius degrees.
Language: allows switching the
displayed text between French and
English.
Important: Access to the
Tests tab appearing on the controller’s screen is protected by a
password. Under no circumstances should a user try to access it.
This function is used at the Dettson factory to test the Hydra
Revolution before it is shipped to a distributor. If the user manages
to enter the correct password the machine will be stuck in the test
function. To exit the test function, the machine must be shut down, it
will then return to the main screen after being subsequently turned
on.
Installer:
The installer menu’s goal is to make
the installer’s work easier. This menu
is protected by a password that can
be found on the electrical schematic
glued to the plastic case of the Hydra
Compact.
The password consists of a
combination of characters entered
with the three buttons of the Hydra
(left, center, right then center).
The user shouldn’t try to gain access
to this menu as it is used to program
the behaviour of the device.
Type: Gives a preset value to the
temperature set point. Mass, Plinth,
Light and Cast Iron are preset values
for determining temperature ceil.
Manual allows the installer to
manually choose the set point.
Pump: Choose the way to drive
the pump. Off means the pump will activate only when there is a
demand from the thermostat. “On” means that the pump will always
be active. 20 Seconds indicate that the pump will deactivate 20
seconds following the end of a heating demand from the thermostat.

8
Set P: Set the target
temperature the device will try to
reach upon the reception of a
signal from the thermostat.
T° out: Allows the device to
know if an external sensor is
being used.
Boost Mode:
The boost mode menu allows the
user to raise the boiler’s temperature
set point by 10 degrees Fahrenheit
during 24 hour. Press the central
button while in this menu to activate
or deactivate this measure.
Figure 3: Navigation in menus

9
Figure 4: Modulation in function of the exterior temperature
85,0
95,0
105,0
115,0
125,0
135,0
145,0
155,0
165,0
175,0
5,0 25,0 45,0
Boiler temperature (ºF)
Outdoor air temp (ºF)
Boiler temperature in function of outside temperature
Plinth (T_Setpoint = 175ºF)
Cast Iron (T_Setpoint = 150ºF)
Light (T_Setpoint = 125ºF)
Mass (T_Setpoint = 100ºF)

10
SECTION 3: MAINTENANCE
The property owner has the following responsibilities:
a. To maintain the area around the boiler clean at all times and
free from combustible and highly flammable material;
b. To ensure that the ambient air at the boiler is not excessively
dusty or humid;
c. To have all water leaks repaired in the system as they arise.
d. To ensure that the ambient temperature in the area where the
unit is installed does not exceed 27oC (80oF).
CAUTION
The boiler guaranty may be invalidated if: water
leaks in the system are not repaired; the boiler is
used as a source of domestic hot water or a
significant amount of new water or air is
introduced into the system.
It is recommended that the boiler be purged annually, in order to
eliminate sediment and sludge that may have accumulated at the
bottom of the boiler and covered the heating elements.
Procedure:
1. Let the boiler cool down;
2. Close the maintenance valves, which are installed at the water
inlet and outlet of the boiler. N.B.: It is not recommended to
drain the water from the heating pipe system;
3. Hook-up a garden hose to the drain valve and place it close to
a floor drain;
4. Open the purge valve until the water comes out clean and
clear;
5. Close the valve.
It is recommended to perform a visual inspection of the boiler
electrical compartment annually, during the heating season. The
items to check are the water tightness of the elements, signs of
overheating of the electrical components and the wiring. Corrective
measures must be undertaken as required, as soon as possible.
Defective components should always be replaced with the Original
Equipment Manufacturer’s parts.
SECTION 4 : INFORMATION
Model:
Serial number:
Installation date of the electric boiler:
Service telephone # –Day:
Night:
Dealer name and address: