Dettson HYDRA09-E2401M-C Assembly instructions

ELECTRIC BOILER
Models:
HYDRA09-E2401M-C
HYDRA15-E2401M-C
HYDRA18-E2401M-C
HYDRA20-E2401M-C
HYDRA24-E2401M-C
X40128 Rev. M
C
Manufactured by:
UTC Canada Corporation
ICP Division
3400 Industrial Boulevard
Sherbrooke, Quebec- Canada
J1L 1V8
Caution: Do not tamper with the
unit or its controls.
Call a qualified service technician.
INSTALLER / SERVICE TECHNICIAN:
USE THE INFORMATION IN THIS MANUAL FOR THE
INSTALLATION AND SERVICING OF THE UNIT AND KEEP THE
DOCUMENT NEAR THE FURNACE FOR FUTURE REFERENCE.
HOMEOWNER:
PLEASE KEEP THIS MANUAL NEAR THE FURNACE FOR
FUTURE REFERENCE.
Printed in Canada
Printed on 100% recycled paper
DNS-0959Rev.B
2008-04-14

SECTION 1
INSTALLATION
1.1) SAFETY LABELING AND SIGNS
DANGER, WARNING AND CAUTION
3
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.
1.2) HEATING WITH HOT WATER
Your HYDRA 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.
1.3) 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;
- A ½’’ NPT to ⅛’’ NPT reducer for the installation of
an air purge valve;
- Modulating outdoor sensor
1.4) 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.
1.4.1) 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 can be installed directly on a wall, by way of the mounting
plate, supplied with the unit. Ensure that it is installed level and that
the clearances indicated below are respected (Table 1).
1.5) CLEARANCES
The following clearances should be provided for the servicing of the
unit:
Table 1
LOCATION CLEARANCE
Access side to elements 0.41 m (16")
Other side 15.24 cm (6")
Above 15.24 cm (6")
Front 0.61 m (24")
Back 0"
1.6) 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 1 for the functions of the various boiler connections.
The heating system must be set-up to operate at a maximum
pressure of 28 psi and the operating temperature may range from
32oC to 88oC (90oF to 190oF).

Freeze protection (when required)
4
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.
1.7) INSTALLATION OF THE BOILER
At the time of installation, the following steps should be followed.
Refer to Figure 1 and 2.
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 as indicated in
Figure 1;
3. An air vent can be installed on the unit. In such case, use the
½’’ NPT to ⅛’’ NPT reducer, which is provided;
4. Install the water supply and return piping with the 1” NPT fitting;
5. The heating supply line must include:
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. The flow of water through the system must be sufficient to
continuously discharge the energy generated by the boiler. If
not, the High Limit protector will disconnect all the electric
elements and a more or less frequent cycling mode will be
established by the Safety Control (see the Technical
Specifications Table);
7. In order to ensure satisfactory water flow, the friction in the
piping system must not exceed the capacity of the circulator;
8. After having completed all piping connections, run water
through the system and purge the air. The automatic vent
should be in operation.
Note: Remove the panel on the right side of the unit and check
to see if the elements are watertight.
1.8) 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,
single phase, 3-wire, grounded circuit, protected by an appropriately
sized breaker, based on the total rating of the boiler. 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 aluminum
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 aluminum 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)
1.8.1) CONNECTING THE CIRCULATING PUMP
The electronic circuit is designed such a way that the circulator
functions, based only on demand by the thermostat.
1.8.2) CONNECTING THE THERMOSTAT
Note: All wiring outside the control panel is 24V.
Single heating zone
Connect the low voltage thermostat to TH terminals located outside
the control panel on the left side of the unit.
Multiple heating zones
Connect the contacts of the motorized valves or pump controls to
TH terminals outside the control panel on the left side of the unit.
The anticipator inside the thermostat must be adjusted according to
the electrical load connected to the thermostat.
1.8.3) 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 S1and S2on the side of the boiler.

SECTION 2
OPERATION
2.1) ADJUSTMENTS AND START-UP
CAUTION
5
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. With the help of a small screwdriver, adjust the boiler
temperature screw, located on the control board, to between
"90oF-140oF-190oF" (see Figure 3, note 4);
2. To check whether all the elements are functional, regardless of
the outside temperature, move the modulation jumper from
terminal “M M” to “M”, thereby by-passing the exterior sensor;
3. Check if the jumper "NUMBER OF ELEMENTS" is in the
proper position. Refer to Table 2 to determine the position of
the jumper, based on the power rating;
4. Turn on the power;
5. Set the thermostat in the house to 30oC (85oF). The circulator
should start-up and the elements should start sequentially, one
by one, at approximately 15 second intervals. The pilot lights
provide a visual check of the operation of the boiler:
- 3 pilots on at 9 to 15kW;
- 4 pilots on at 18 to 20 kW;
- 6 pilots on at 24 kW;
6. The circulator stays on for as long as there is a call for heat;
7. As soon as the demand for heat is met or the assigned
temperature is reached, the elements stop sequentially, one by
one, at 1 second intervals between each;
8. If an exterior modulating sensor is installed, it is possible to
deactivate the modulating function by moving the jumper from
terminal “M” to “M”.
TABLE 2
Power (kW) Number of
Elements Jumper Position
9, 15, 18, 20 2, 3 and 4 #4
24 6 #6
2.2) CHECKING THE CONTROLS
Operational Controls
After having made sure that the boiler is completely filled with water
and that there is no call for heat, turn on the power to the unit.
By observing the temperature indicator, allow the water temperature
to rise to 60oC (140oF). Then, turn the electronic Limit Control
counter clockwise to 32oC (90oF). The elements will stop
sequentially, one by one, at 1 second intervals between each. Now,
the water temperature must be adjusted with the "90oF to 190oF set
screw on the electronic board.
Mechanical High Limit Control
Use the same procedure as outlined in the preceding paragraph, but
now on the mechanical aquastat, located at the bottom right of the
control panel. This time the elements will all disengage at the same
time. The mechanical limit aquastat must be set 20oF above the
temperature on the electronic board.
Modulation Control
Turn off the power to the electric boiler. Place the jumper "M M" on
the electronic board to the position "M". In this way, the total output
of the boiler is governed by the evaluation of the outside
temperature, as indicated in Table 3. The purpose of this feature is
to considerably reduce the number of heating cycles. The shut-down
sequence of the elements, based on the temperature, is described
in Table 4.
2.3) BCEH DUAL-ENERGY INSTALLATION
In order to obtain a special rate (DT rate) from your hydro-electric
power supplier on residential applications, your HYDRA boiler can
be hooked-up to an existing oil heater.
Contact your Hydro office to find out if your property is eligible to
receive this rate and how to go about obtaining it.
BCEH dual-energy controls are specially designed to Hydro
standards. The BCEH control selects the least expensive energy
source, either oil or electricity, based on outside temperature or a
signal from Hydro.
The BCEH dual-energy control will start-up the oil burner when the
contact in the outdoor dual-energy sensor closes (due to a drop in
temperature or other signal), even if the thermostat in the house is
not calling for heat. It will stop when the temperature in the boiler
reaches its target on the Limit Control. Only in such a case is an
anti-gravity valve (flow check valve) or are motorized zone valves
required.
A three-way, motorized valve will direct the water flow either to the
oil fired heater or to your electric HYDRA boiler, depending on the
signal received from the outdoor dual-energy sensor.
Refer to Figures 5 and 6 for installation instructions.

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
6
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:

7
TABLE 5
HYDRA - Technical Specifications
TABLE 3
Power vs Outside Temperature (with modulation)
TABLE 4
Element De-Activation Sequence (with modulation)
RATING AND PERFORMANCE
Power (Kw) 9 15 18 20 24
Net capacity (BTU/h) 30 708 51 180 61 416 68 240 81 888
ELECTRICAL SYSTEM
Volts - Hertz - Phase
Electricalelement#1(Kw) 35554
Electricalelement#2(Kw) 35554
Electricalelement#3(Kw) 35554
Electrical element #4 (Kw) N/A N/A 3 5 4
Electrical element #5 (Kw) N/A N/A N/A N/A 4
Electrical element #6 (Kw) N/A N/A N/A N/A 4
Consumption (Amp) 38 62 75 83 100
Circuit Amperage (wire sizing) 48 78 94 104 125
Maximum recommended circuit breaker (Amp) 50 80 100 125 125
Recommended fuses (Amp)
1
50 80 100 110 125
GENERAL INFORMATION
Supply - Return
Minimum water flow USG/min (L/min.) 3.25 (12.3) 5.15 (19.5) 6.44 (24.4) 6.84 (25.9) 8.2 (31.0)
24 VAC output ("C-24 VAC" terminals)
Overall dimensions (width x depth x height)
Shipping weight
1" NPT male - 1" NPT female
120 / 240 - 60 - 1
25.5" x 14" x 16"
50 kg / 110 lbs
1) Always refer to applicable local and national codes.
20 VA
HYDRA09 HYDRA15 HYDRA18 HYDRA20 HYDRA24
0°C(32°F)orless 9 15182024
0°C (32°F) or more 6 10 13 15 20
5°C (41°F) or more 6 10 10 10 16
10°C(50°F)ormore 6 10101012
Power (Kw)
Temperature
1
st
2
nd
3
rd
0°C (32°F) to 5°C (41°F) #3
5°C (41°F) to 10°C (50°F) #3 #4
10°C (50°F) to 15°C (59°F) #3 #4 #5
Outside Temperature Element De-Activated

8
FIGURE 1
Component Identification

9
FIGURE 2
Typical Diagram of a Single Zone Installation

10
FIGURE 3
Electrical Diagram

11
FIGURE 4
Ladder Diagram

12
FIGURE 5
Typical Diagram of a Dual-Energy Installation without 3-way Valve

13
FIGURE 6
Typical Diagram of a Dual-Energy Installation with 3-way Valve

14
PARTS LIST
HYDRA
B50045 Rev. F

15
PARTS LIST
HYDRA
ITEM PART # DESCRIPTION
1 B20180 Electric Boiler Assembly
2 B20197 Insulation, left side
3 B02293-20 Insulation
4 B20170 Cabinetpanel,left
5 B20168-01 Electrical box,cover
6A B20217 Electrical box
6B B20166 Electrical boxrightside panel
6C B20117 Electrical boxleftside panel
7 G11F012 Pressure reliefvalve,30 PSI,3/4"x3/4"
8 G11Z001 Sedimentfaucet,1/2
9 R02L001 Tridicator,0-75PSI1/4"NPT
10 B20219 Cabinet
11 B20171 Cabinetpanel,right
12 A20013 Thermistor probe
13 L99H001 Water Element, 240V/5 Kw
14 L99H002 Water Element, 240V/3 Kw
15 L99H003 Water Element, 240V/4 Kw
16 A20015 Outdoor sensor,-12°C
17 B20179 Mounting plate
18 B02293-24 Insulation
19 L02G001 Fuse holder,BUSS
20 L01G002 Fuse 2A
21 L01G007 Fuse 15A
22 L01F009 Transformer,120-24 Volts,40VA
23 R02F001 Single action aquastat,Honeywell L4008A
24 L01H002 Relay, SPST 24 VDC
25 A20022-01 Electrical wire,black
26 L99F004 Terminal block
27 A20023-01 Electrical wire, red
28 A20009-01 Electrical wire, red
29 L01H024 Contactor 240 VAC
30 A20009-02 Electrical wire,black
31 B20120 Electrical kit
32 B20098 Electronic Board Hydra 3
33 B20119 Electrical kit
L50045 Rev. F