Electric Boilers
MINI ULTRA
M
odels from 6 kW to 12 kW :
INSTALLATION & OPERATING MANUAL
120/240V single phase
Your MINI ULTRA Electric Boiler has been carefully assembled and factory tested to provide
years of trouble-free service. The following information and safety measures are provided to
enable proper installation, operation, and maintenance of this product.
It is imperative that all persons who are expected to install, operate or adjust this boiler
should read these instructions carefully.
Any questions regarding the operation, maintenance, service or warranty of this electric
boiler should be directed to the supplier.
When all installation steps have been completed, insert this installation manual in its original
envelope, and keep in a safe place (close to the boiler) for future reference.
THERMO 2000 INCORPORATED revision: Feb 2010
Printed in Canada
Ratings & Specifications at 120/240** Vac (single phase) :
MINI ULTRA
Model Capacity
KW/BTU/H
MINI Ultra 6 6 / 20,470 25 2 x 3 KW 2 10 8 40
MINI Ultra 9 9 / 30,710 37.5 2 x 4.5 KW 2 8 6 50
MINI Ultra 12 12 / 40,940 50 2 x 6 KW 2 6 6 70
! Add the amperage (Max. 5amp) of the circulating pump if it is connected directly to the boiler
* A higher capacity cable could be required. In all cases the local Electrical Code has priority.
** Electric supply « L1-N-L2 » with three conductors + ground.
Amps!
(A)
Electric
Element(s)
Stage(s)
Cable*!
90C
Cu Al Amp.
Breaker*!
Dimensions
Connections Overall dimensions
Inlet/ heating return 3/4 “ NPT Fem Height 21-1/2 inches
Outlet/ heating supply
Pressure relief valve 3/4 “ NPT Fem Depth 9 inches
Drain valve 3/4 “ NPT Fem Weight 40 lbs.
Operating temp. range: 70°F (10C) to 190°F (88C). Maximum pressure : 30 psi (207kPa)
3/4 “ NPT Fem Width 9 inches
Figure 1.
BTH Electric Boilers USE & CARE MANUAL
(Revision Feb. 2010), Page
2.
General Safety Precautions
!
Be sure to read and understand the entire Installation & operation manual before attempting to
install or to operate this water heater. Pay particular attention to the following General Safety
Precautions. Failure to follow these warnings could cause property damage, bodily injury or
death. Should you have any problems understanding the instructions in this manual, STOP,
and get help from a qualified installer or technician.
INTRODUCTION
WARNING
!
These important safeguards and instruction
appearing in this manual are not meant to
cover all possible conditions and situations
that may occur. It should be understood that
common sense, caution and care are factors
which cannot be built into every product.
These factors must be supplied by the
person(s) caring for and operating the unit.
LOCAL INSTALLATION REGULATIONS
This electric boiler must be installed in
accordance with these instructions and in
conformity with local codes, or in the absence of
local codes, with the National Plumbing Code
and the National Electric Code, current edition.
In any case where instructions in this manual
differ from local or national codes, the local or
national codes take precedence.
SECURITY CONSIDERATIONS
Domestic and commercial installations have a
maximum design operating pressure limited to
30 psi (207kPa) by a safety relief valve.
Boiler maximum operating temperature is 190°F
(88C) by design. This boiler is designed to be
used only in a hot water heating system.
CAUTION
!
The heat transfer medium must be water or
other non-toxic fluid having a toxicity rating
or class of 1, as listed in clinical Toxicology
of Commercial products, 5th edition.
Concentration of propylene-glycol shall be
limited to 50%
CHECK LIST
Please check the identification tag on the unit to
make sure you have the right model.
List of components shipped with the unit :
· Pressure relief valve set at 30 PSI.
· Drain valve.
· Temperature & pressure indicator
(Factory installed).
· Outdoor temperature sensor
SHIPMENT INSPECTION
Inspect the electric boiler for possible shipping
damage. The manufacturer’s responsibility
ceases upon delivery of goods to the carrier in
good condition. Consignee must file any claims
for damage, shortage in shipments, or nondelivery immediately against carrier.
BTH Electric Boilers USE & CARE MANUAL
(Revision Feb. 2010), Page
3.
INSTALLATION
The manufacturer’s warranty does not cover any damage or defect caused by installation, or
attachment, or use of any special attachment other than those authorized by the manufacturer
into, onto, or in conjunction with the water heater. The use of such unauthorized devices may
shorten the life of the boiler and may endanger life and property. The manufacturer disclaims any
responsibility for such loss or injury resulting from the use of such unauthorized devices
WARNING
!
LOCATION
The electric boiler should be installed in a clean,
dry location. Long hot water lines should be
insulated to conserve water and energy. The
electric boiler and water lines should be
protected from exposure to freezing
temperature.
The electric boiler must be located or protected
so as not to be subject to physical damage, for
example, by moving vehicles, area flooding, etc.
The electric boiler should not be located in
an area where leakage of the tank or water
connections will result in damage to the
adjacent area or to lower floors of the
structure. When such areas cannot be
avoided, a suitable drain pan or nonflammable catch pan, adequately drained,
and must be installed under the boiler.
The pan must be connected to a drain.
NOTE: Auxiliary catch pan MUST conform to
local codes.
CAUTION
!
The boiler can be mounted directly on a wall
with adequate screws.
All models in alcoves. The ambient temperature
must not exceed 90F (32C)
The electric boiler should not be located near an
air vent blowing a corrosive atmosphere or high
humidity. The limited warranty is void when the
failure of the electric boiler is due to a corrosive
atmosphere.
The choice of the mounting position of the boiler
shall be made in relation with the required
clearances shown below and the fact that the
electric element compartment of the boiler
needs clearance to allow their replacement.
°
CLEARANCE
For adequate inspection and servicing the
following minimum clearance is necessary:
Electric elements side 14 in./35cm
Front side of the boiler
Sides
Back
4 in. /10cm
24 in./60cm
0 in./0cm
Fig. 2 Mounting position
BTH Electric Boilers USE & CARE MANUAL
(Revision Feb. 2010), Page
4.
BOILER WATER CONNECTIONS
Make sure you connect the accessories and the piping to the proper connection fittings as indicated at figure
2 above and according the selected mounting position.
Figure 3 below shows typical connections of a MINI boiler to a radiant floor heating system. The location of
the distribution system components may be different from what is represented.
Figure 3 : Typical piping lay-out
Flow check valve
On heating systems having more than one pump,
each pump will need to be equipped with a flow
check valve either incorporated into the pump or
separate.
Pressure relief valve
This component supplied with the unit must be
installed directly to the boiler housing to the
appropriate connection according to the mounting
position.
Connect the outlet of the relief valve downward to
a safe location in case of discharge.
The piping diameter used for the discharge piping
shall not be smaller than that of the valve outlet. .
No valve of any type, restriction or reducer
coupling should be installed on the discharge line.
Local codes shall govern the installation of relief
valves.
Expansion tank
The expansion tank must be able to store the
required volume of boiler water during maximum
design operating temperature. The maximum
allowable operating pressure is 30PSI
(207kPa).Contact your installing contractor,
plumbing supply house, or local plumbing
inspector for assistance.
Water pressure makeup regulator
Make-up systems must be employed as required
by codes. An automatic fill valve must be used
with a backflow preventer as required, to maintain
minimum system pressure by supplying water to
make up for leakage.
The minimum pressure obtained when the system
is cold is generally of 12 psi (83kPa).
This accessory shall be equipped with one or
more check valves to avoid all possibilities of the
boiler water returning to the potable water supply
network.
BTH Electric Boilers USE & CARE MANUAL
(Revision Feb. 2010), Page
5.
Model
Diff. 10F (usgpm)
Diff. 20F (usgpm)
Boilerpress.drop
MINI Ultra 6
4.0
2.0
Negligible
MINI Ultra 9
6.0
3.0
Negligible
MINI Ultra 12
8.2
4.1
Negligible
Air bleeder
Installation of manual or automatic air vents are
required to eliminate all air from the boiler and the
heating distribution system.
Circulating pump
We recommend that the pump be installed at the
outlet of the boiler with isolating valves as shown
in figure 3.
The pump shall be selected such as to be able to
supply adequate flow in relation to the heating
distribution system on which it will be connected
and the heating capacity of the boiler installed.
The table below will give you details on required
water flow for distribution systems having to
operate with a differential temperature of 10F and
20F between their inlet and outlet
There is no minimum water flow required to
operate the unit adequately.
.
ELECTRICAL CONNECTIONS:
Main boiler supply
Wiring must conform to the National Electrical
Code and to state or local code requirements.
The electric boiler must be electrically grounded in
accordance with local codes, or, in the absence of
local codes, with the National Electrical Code.
Wiring must come from a 120/240 Volt (single
phase, 60 Hz) “L1-L2-N” circuit protected by a
properly sized breaker.
Wire gage (3 wires+ground) must be properly
sized. Consult the boiler rating plate to select the
proper breaker and wire gage.
The main terminal block of the boiler is suitable for
#14 to #2 wires.
Supply cables can be made of Aluminum or
Copper and be rated for 90C (194F).
If aluminum cables are used, it shall be of an
adequate size (generally bigger) to meet the
National electrical code.
Your heating wholesaler shall be in good position
to recommend the appropriate model for your
application.
The amperage drawn by the pump and other
120volts components shall not exceed 5 amps.
Drain valve
Installed at the lowest point of the unit, it allows
the unit to be drained for the eventual
replacement of a defective component.
Strainer
This component is used to collect potential
sediments coming from the distribution system
and more particularly from systems made of steel
piping and radiators. If such sediments
accumulate at the bottom of the boiler it could be
harmful to the heat transfer of the elements and
generate premature failures.
Outdoor temperature sensor
It is required in “Mode 4” when you want the target
boiler temperature to modulate according to the
outdoor temperature and in Mode 1 & 4 to operate
the “WWSD” (Warm wheater shut down) feature
that avoid the operation of the boiler when the
outdoor temperature exceed the selected value.
The sensor shall be connected to terminals S1-S1
in the boiler using a two conductor cable 22ga
min.
Thermostat(s) and pump(s) connections:
Heating systems equipped with one
thermostat and one pump:
With a 18gauge cable, connect the room
thermostat directly to the T & T boiler terminals.
Using 14 gauge wires, connect the circulating
pump directly to terminals “C” and “C” (120vac)
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6.
Multiple pumps zoning applications:
Components shall be connected in such a way
that when a thermostat is generating a heat
demand, only the corresponding pump be
operated.
To do so, you will need relays as illustrated below.
Boiler terminals CC-120 will not be used.
Zoning applications with motorized
valves :
Connect the low voltage thermostat to the zone
valve. Components must be wired to ensure that
only the zone valve corresponding to the zone
calling for heat is actuated. When a zone valve
opens, it generally closes a switch that is
incorporated in it. Connect each switch to the “R”
& “W” terminals in the boiler.
Connect the circulator to terminals “C” and “C” in
the boiler.is powered on a demand from any zone.
The transformer used to power the zone valves
must be sized for the load represented by all zone
valves in the heating system.
BTH Electric Boilers USE & CARE MANUAL
(Revision Feb. 2010), Page
7.
ADJUSTMENTS OF THE CONTROL MODULE
INTRODUCTION
The MINI Ultra boiler is mainly designed to be installed
on applications where the water of the heating system
flow directly from the boiler to the heating distribution
system (Standard parallel Piping system)
Two operation modes are then offered:
Design-Mode 1: For installation where the boiler
target temperature shall be maintained at a fix
temperature that will not vary in relation to the
outdoor temperature.
On a call for heat from the room thermostat, the
circulating pump will start and the boiler will
activate the number of stage required to get to
and maintain the outlet temperature of the boiler
near the selected target temperature. A rotation of
the stages based on a time period is provided.
Design-Mode 4:
For installation where the boiler target
temperature shall modulate in relation to the
outdoor temperature. When the outdoor
temperature gets colder, the boiler target
temperature will increase.
On a call from the room thermostat, the circulating
pump will start and the boiler will activate the
number of stages required to get to and maintain
the outlet boiler temperature near the target
temperature established by the controller
according to the outdoor temperature. A rotation
of the stages based on a time period is provided
DISPLAYED INFORMATION
The electronic control use an LCD display to
make all adjustments and to visualize the
operation of the system. It uses three push
buttons (Item, p, q) to select and adjust the
parameters.
Paramètre
BOIL
TARGET
Item
VIEW
180F
Aux Dem
Menu
1 2
3 4
DEM
Statut
Shown when the pump is
o
F, oC
running.
1 2
Units.
Shown when
stage 1and/or 2
are in operation
OPERATION OF THE INTERFACE
All of the items displayed by the control are
organized into two menus. These menus are
listed on the upper right hand side of the display
(View, Adjust). The default menu for the control
is the View menu. To select the Adjust menu,
press and hold simultaneously all three buttons
(Item, p, q) for 1 second. The display then
advances to the Adjust menu and the Adjust
segment is turned on in the display. The display
will automatically revert back to the View menu
after 20 seconds of keypad inactivity. Once in a
menu, there will be a group of items that can be
viewed within that menu.
The abbreviated name of the selected item will be
displayed in the item field of the display
“DEM” will be shown when a heat demand from
the thermostat will appear.
To view the next available item, press and release
the Item button.
“BOIL OUT”: Real boiler water temperature
leaving the boiler
“BOIL TARGET”: Target temperature that the
boiler will try to maintain. The display will show ”
-
“ when no demand is present.
--
“OUTDOOR”: The temperature at the sensor
located outside the building if installed (Not
compulsory in Design-Mode1).
ADJUSTMENT PROCEDURE
To make an adjustement to a setting in the
control, begin by selecting the Adjust menu by
pressing and holding simultaneously all three
buttons (Item, p, q). Then select the desired
item using the Item button. Finally, use the p or
q button to make the adjustment.
BTH Electric Boilers USE & CARE MANUAL
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8.
g to maintain at the boiler
ADJUSTMENTS
Design-Mode 1 Settings :Fix target temperature / Parallel piping
To configure the control in mode 1, begin by selecting the Adjust menu by pressing and holding
simultaneously all three buttons (Item, p, q). Then select the item DSGN-MODE using the Item button.
Finally, use the p or q button to set the value to 1.
VIEW MENU
Item Description
OUTDR
O UTDR
V IE W
32 F
Current outdoor air temperature as measured by the outdoor sensor.
This value will appear only if the outdoor sensor is connected to the unit.
BOIL TARGET
B O IL
TARG E T
V IE W
100 F
Boiler target supply is the temperature the control is currently tryin
outlet. The display will show --- when no heat demand is present.
BOIL OUT
B O IL O U T
V IE W
Current boiler outlet water temperature.
9 5 F
ADJUST Menu
Item Description Default Range
MODE
A D JU S T
M O D E
BOIL TARGET
B O IL E R
T A R G E T
1 3 5 F
PUMP’ DLY
0 :2 0
D L Y
WWSD
W W SD
Units
7 5 F
1
A D J U S T
A D J U S T
A D J U S T
A D JU S T
Set the operating mode for the control to 1.
1
Set the boiler target temperature during heat demand. If you
don’t know the operating temperature of the heat distribution
system, you could start by using the following proposed
values.
TH2000
BOIL
TARGET
Important: If the selected target value is above 140F, see
note 1 below the table in page 11.
Determine the purge period of the pump upon the completion
of a heat demand from the thermostat.
Set to “OFF” if the heating system is equipped with electric
zone valves.
Default
135F 180F 155F 115F 140F
Baseboard Cast Iron
radiator
Warm floor
high mass
Warm
floor
between
joists
135oF 70 oF à 190 oF
20 sec
The outdoor air temperature at which the control will shut
down the boiler operation even if there a heat demand
present
75 oF
F
The unit of measure that all of the temperatures are to be
displayed in by the control.
o
F
1, 4
OFF, 20 sec,
ON
10oF à 105oF,
OFF
o
F ou oC
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(Revision Feb. 2010), Page
9.
Outdoor Reset Operation (Design-Mode 4
)
When Design-Mode 4 is selected, the control uses outdoor reset to control the water temperature.
Outdoor reset adjusts the boiler target temperature based on the outdoor air temperature and reset ratio.
The reset ratio and the target temperature are determined from:
BOIL START, BOIL DSGN, OUTDR START, OUTDR DSGN, BOIL OUT MAX, BOIL TARGET MAX,
WWSD. as illustrated below.
Some of these parameters (Illustrated in small characters) do not generally need to be modified and
consequently will not appear when making the standard adjustment of the controller. If they need to be
modified, the heating contractor will need to access a special menu (see page 11).
BOIL TARGET
MAX 150F
Increasing boier water temperature
WWSD
OUTDR
START
70F/21C
BOIL
START
Decreasing outdoor temperature
OUTDR
DSGN
-10F/-23C
BOIL
DSGN
Design-Mode 4 Settings: Modulation of the boiler target in relation to the outdoor
temperature / Parallel piping (Outside sensor required)
To configure the control in Desing-mode 4, begin by selecting the Adjust menu by pressing and holding simultaneously all three
buttons (Item, p, q). Then select the item DESIGN-MODE using the Item button. Finally, use the p or q button to set the value to
4.
VIEW Menu
Item Description
OUTDR
OUTDR
VIEW
32 F
Current outdoor air temperature as measured by the outdoor sensor.
An error code “OPN” will appear if the outside sensor is not connected.
BOIL TARGET
Target boiler supply is the temperature the control is currently trying to maintain at
the boiler supply sensor. The display will show --- when no heat demand is
present.
BOIL
TARGET
VIEW
100 F
BOIL OUT
VIEW
BOIL OUT
Current boiler outlet water temperature.
95 F
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10.
OFF, 20
maximum boiler target temperature BOIL
ADJUST Menu
Item Description Default Range
MODE
M O D E
BOIL START
BOIL
STA R T
80F
BOIL DSGN
D S G N
BO IL
135F
PUMP’ DLY
0 : 2 0
D L Y
WWSD
W W SD
7 5 F
A D JU S T
4
ADJ U S T
ADJU S T
A D J U S T
A D J U S T
Sets the operating mode for the control to 4.
The theoretical boiler supply water temperature that the heating system
requires when the outdoor air temperature equals the OUTDR START
temperature setting of 70F/21C.
Baseboard
BOIL START
The water temperature required to heat the building when the outdoor air is as
cold as the OUTDR DSGN (-10F/-23C)) temperature.
125oF 100oF 75oF 90oF
Baseboard
Cast iron
radiator
Cast iron
radiator
Warm floor
high mass
Warm floor
high mass
Warm floor
between
joists
Warm floor
between
joists
BOIL DSGN 180F 155F 115F 140F
Imp: If the selected target value is above 140F, see note 1 below the table
Determine the purge period of the pump upon the completion of a heat
demand from the thermostat.
Set to “OFF” if the heating system is equipped with electric zone valves
The outdoor air temperature at which the control will shut down the boiler
operation even if there a heat demand present. This function avoid the heating
to operate when the outside temperature is mild.
1
80 oF
135 oF
20 sec
75 oF
1, 4
35oF à
150oF
70oF à
190oF
sec, ON
10oF à
105oF,
OFF
Units
A D J U S T
F
The unit of measure that all of the temperatures are to be displayed in by the
control.
o
F
o
F ou oC
Note 1: If the boiler is installed on an heating system designed to operate with a water
temperature higher than 140F, not only the boiler design “BOIL DSG” value will have to be
resettled but also the values of the preset “BOIL TARGET MAX” and “BOIL OUT MAX”
parameters. (See below how to access them).
BOIL OUT MAX shall be set 15F higher than the BOIL DESIGN setting.
BOIL TARGET MAX (Mode 4 only) shall be set 5F higher than BOIL DESIGN setting.
Advance adjustments:
The controller offers to the installer many adaptation capabilities allowing to adapt the control to a variety
of heating system designs. To access these adjustments the “A” switch below will need to temporarily be
flipped to “ON”. Get into the Adjust menu and press the item button to reach desired parameter. Adjust
the value by pushing the proper arrow button. Here is a partial list of the supplementary possibilities:
q Modification of the reset curve OUTDR START and
OUTDR DSGN temperatures (Mode 4 only).
q Setting the
TARGET MAX (Mode 4 only) .
Item
q Setting of the maximum boiler temperature BOIL
OUT MAX . If the boiler temperature reaches this
value, all the elements will immediately shut off.
ENLEVER COUVERCLE
DU CONTRÔLEUR
B AON OFF
ON OFF
q Adjustable temperature differential DIFF.
q Setting of a minimum boiler temperature BOIL
TARGET MIN.(Mode 4 only) if required.
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11.
SAFETY PRECAUTIONS
!
START UP OPERATION
Before operating this boiler, be sure to read and follow these instructions, as well as the warnings
printed in this manual. Failure to do so can result in unsafe operation of the boiler resulting in
property damage, bodily injury, or death. Should you have any problems reading, following or
difficulty in understanding the instructions in this manual, STOP, and get help from a qualified
person.
Do not turn on the boiler unless it is filled with water. Do not turn on the boiler if the cold water
supply shut-off valve is closed.
Preparatory step
q
Make sure that all the piping and
electrical connections have been made.
q
Fill the boiler and the heating system
with water.
q
Check for leaks.
q
Check the pressure reading at the
On initial start up it may take a considerable
amount of time before the water reaches the
desired temperature
Further adjustments may be necessary as you
use your boiler and space heating system.
temperature and pressure indicator. It
shall be around 12psi.
q
Completely eliminate all the air from the
boiler and the distribution piping system.
q
Adjust the boiler temperature control as
explained above
q
Set the room thermostat ON to generate
a heat demand. The pump shall start.
q
Check that the water is circulating in the
distribution system and that all the air is
expelled. Heating elements of the boiler
shall gradually be activated and the
boiler outlet temperature will increase.
Inspection
q
Measure the amperage drawn by the
unit. It shall be around the value
indicated on the boiler name plate.
q Partially close the isolating valve at the
outlet of the boiler to reduce the water
flow and consequently increase the
outlet temperature . Heating elements
shall stop at a temperature slightly
higher than the selected value on the
controls
q Lower the adjustment of the room
thermostat(s) The heating elements
shall stop and the pump shall stop after
the delay set on the controller.
q Check the pressure reading at the
gauge on the unit. It shall not be higher
than 28psi when the distribution system
will get to its maximum operating
temperature.
BTH Electric Boilers USE & CARE MANUAL
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12.
MAINTENANCE
INTRODUCTION
Properly maintained, your boiler will provide years of dependable, trouble free service. It is recommended that a regular
routine maintenance program be established and followed by the user. Components are subject to eventual failure that
requires service. Failure to use the correct procedures or parts in these circumstances may make the unit unsafe or
reduce the life of the boiler.
The owner should have the following inspection and
maintenance procedures performed:
At all time
An immediate inspection shall be made if:
q An odor of melted plastic or overheating
material is detected
q A leak coming from the unit or the heating
system is observed
If a leak is detected at the outlet of the safety relief
valve, it could be related to a problem with components
installed on your heating distribution system. A quick
correction is then required.
Do not plug the outlet of this valve if a dripping
condition occurs.
Twice a year:
q
Check for the proper operation of the automatic
air purger(s) and eliminate air from the
radiators.
Annually:
q
It is recommended that a visual inspection be
made on the electrical compartments of the
boiler to check the stanchness of the gasket on
the element flange an also check for any
overheating signs of the components and wires.
Required corrections shall be made as soon as
possible.
Parts used for replacement shall be the same
as the original equipment.
WARNING
!
Make sure that the power on the unit has been
turned off before opening the electrical
compartments of the boiler.
q Close required isolating valves and clean the
strainer located on the heating return piping.
q Open the boiler drain valve to eliminate
deposits that could have settle at the bottom of
the boiler. Stop when water gets clear. If there
is no flow or a very small flow, it could be due to
a large accumulation of deposits at the bottom
of the unit. If so, close the isolating valves at the
inlet and outlet of the boiler, remove heating
element(s) and clean the inside of the tank with
a strong jet of water
BTH Electric Boilers USE & CARE MANUAL
(Revision Feb. 2010), Page
13.
6kW :
ZEL300
-
240V6KW
REPAIR PARTS
Heating elements
3kW : ZEL300-240V3KW
4.5kW : ZEL300-240V45KW
Pressure relief valve
ZMC200-SV30PSI1
High limit control
ZEL200-L6C732
Power relays 24VAC
ZEL100-24ACNO30
Fuse
ZEL250-TDCC15A
Pump Relay
ZEL100-24ACSPST
Transformer
ZEL400-120V50VA
Temperature & Pressure
indicator
ZMC300-75P160C
Control multi-pin connector
Controller
ZEL100-BTC2P
Contactor
ZEL100-2PC50120
Main terminal bloc
Control terminals for
thermostat, pump &sensor
PROBLEM CAUSES SOLUTION
The display shows
TARGET position
The display shows
BTH Electric Boilers USE & CARE MANUAL
---
in “BOIL
“SHr”
(short)
Section 7: Trouble shooting
-There is no heating
demand.(Letters DEM arenot
shown at the bottom right corner
of the display)
-In mode 4, the outside
temperature is above the WWSD
setting.
The circuit of the sensor
corresponding to the displayed
information is short
(Revision Oct. 2009), Page
-Generate a heat demand
-Temporarily increase the setting of
WWSD on the controller adjustments
-Make sure that the sensor cable
connected to the unit is not in short
circuit.
-Do not install a jumper between S1S1 when the sensor is not required.
14
The display shows “OPn” (open) The circuit of the temperature
sensor corresponding to the
displayed information is open.
Stage 2 is ON but not Stage 1 There is no problem. A rotation
of the stages is provided to allow
an equal time of operation of the
stages
The boiler water temperature at the
outlet of the unit “BOIL OUT” does
not get to the “BOIL TARGET”
temperature.
-The room thermostat is not in
constant demand.
-Some heating elements are
defective
-The heating distribution system
is using the total capacity of the
boiler at an equilibrium
temperature lower than the boiler
target temperature
Boiler stays in demand even when
the thermostat is not in demand.
(Systems with only one thermostat)
The electronic thermostat used is
not fully compatible with the
boiler.
Boiler stays in demand even when
the thermostat is not in demand.
(Systems with more than one
thermostat)
-On systems with electric zone
valves, one or many end
switches included in the valve is
defective.
-A jumper has been installed on
terminals TT of the boiler
An overheated plastic odour is
released from the boiler
Turn the power OFF to the boiler.
Open the front and left side panel
of the boiler. Check the
components and electric wires
for overheating indications.
Boiler safety valve is leaking -Pressure reading at the indicator
shows a pressure above 28psi
-Pressure is below 28psi
-Select the appropriate heating mode
(modes 2,3,5&5 require an additional
sensor)
-Make sure that the required sensor is
properly connected to corresponding
terminals and that the cable used is
not damaged.
-Adjust the thermostat anticipator (If
available) to obtain longer operating
cycles
-Replace defective elements
-If a boiler water temperature higher is
required to satisfy the heat demands
of the thermostats, a boiler having a
larger capacity is required.
Add a 1000ohms x 1 watt resistor in
parallel with the demand circuit and
the common. We can provide (at no
cost) a kit with required material.
-Replace existing thermostat with a
model having a dry contact not
allowing leaking current to flow in the
boiler controller
-Change defective end switch.
-Make appropriate connections as
shown in fig.14
Replace overheated components and
check supply voltage to the boiler.
-The pressure regulator on the
distribution system is defective or the
expansion tank is too small or
defective.
-Replace the safety valve
BTH Electric Boilers USE & CARE MANUAL
(Revision Oct. 2009), Page
15
MINI ULTRA LIMITED WARRANTY
Warranty Coverage for Residential Installation.
Thermo 2000 Inc. hereby warrants to the original residential purchaser that the MINI
ULTRA tank installed in a residential setting shall be free of leaks during normal use
and service for a period of ten (10) years from the date of purchase as long as the
original residential purchaser owns the home in which the unit was originally
installed, the first (5) years in full and years six (6) through ten (10) prorated 20%
each year at suggested retail price. Residential setting shall mean usage in a singlefamily dwelling in which the consumer resides on a permanent basis. Also,
residential setting shall mean use in multiple family dwellings in which one (1) MINI
ULTRA tank is to be use in only one (1) dwelling. In the event that a leak should
develop and occur within this limited warranty period due to defective material or
workmanship, such leak having been verified by an authorized company
representative, Thermo 2000 inc. will repair or replace at our sole option the failed
unit with the nearest comparable model at the time of replacement.
The original residential purchaser is responsible for all costs associated with the
removal and reinstallation, shipping and handling to and from manufacturing plant.
The replacement unit will be warranted for the remaining portion of the original
Warranty.
Warranty Coverage for Commercial Installation.
Thermo 2000 Inc. warrants to the original purchaser that the MINI ULTRA tank
installed in a commercial setting for ten years, the first (5) years in full and years six
(6) through ten (10) prorated 20% each year at suggested retail price
Commercial setting shall mean use in other than residential setting stated above in
the residential setting definition. In the event that a leak should develop and occur
within this limited warranty period due to defective material or workmanship, such
leak having been verified by an authorized company representative, Thermo 2000
inc. will repair or replace at our sole option the failed unit with the nearest
comparable model at the time of replacement.
The original purchaser is responsible for all costs associated with the removal and
reinstallation, shipping and handling to and from Manufacturer. The replacement
unit will be warranted for the remaining portion of the original Warranty.
Limited two years warranty on all MINI ULTRA
components & parts
All other MINI ULTRAcomponents & parts are warranted for a period of two (2)
years against defects due to defective material or workmanship. The original
purchaser is responsible for all costs associated with the removal and reinstallation,
shipping and handling to and from Manufacturer. The components, repaired or
replaced are warranted for the residual period of the initial warranty on the unit.
Exclusions.
This warranty is void and shall not apply if:
1. Defects or malfunctions resulting from installation, repair, maintenance and/or
usage that are not done in conformity with the manufacturer’s installation
manual; or
2. Defects or malfunctions resulting from installation, maintenance, or repair that are
not done in accordance with regulations in force; or
3. Defects or malfunctions resulting from improper installation, maintenance or repair
done carelessly or resulting from consumer damage (improper maintenance,
misuse, abuse, accident or alteration); or
4. Installation in which a relief valve (pressure) is not installed or if it is not functioning
properly, or when it is not connected to a drain to avoid damage to the property; or
5. Installation in which liquid circulating in the tank does not remain in closed circuit or
installation in which piping is leaking; or
6. A polybutylene pipe or radiant panel installation without an oxygen absorption
barrier is used; or
7. Installation where the acidity of water is not within the normal Environmental
Protection Agency (EPA) (between pH 6.5 – 8.5) guidelines or the domestic water
contains abnormal levels of particulate matter or water exceeding 10.5 gpg; or
8. Your home contains any type of water softener system and the unit is not installed
and maintained in accordance with the manufacturer specifications; or
9. The MINI ULTRA unit is being subject to non authorized modifications; or
10. Defects or malfunction resulting of storing or handling done elsewhere than Thermo
2000’s manufacturing plant; or
11. Units on which the serial number is removed or obliterated.
Limitations.
Thermo 2000 shall not be responsible for any damage, loss, and inconvenience of any
nature whatsoever, directly or indirectly, relating to the breakdown or malfunction of the
unit. This warranty limits its beneficiary’s rights. Nevertheless, the beneficiary may have
other rights, which vary from state to state.
This warranty replaces any other expressed or implicit warranty and constitutes the sole
obligation of Thermo 2000 towards the consumer. The warranty does not cover cost of
removal, reinstallation or shipping to repair or replace the unit, nor administration fees
incurred by the original consumer purchaser.
Thermo 2000 reserves its rights to make changes in the details of design, construction, or
material, as shall in its judgment constitute an improvement of former practices.
This warranty is valid only for installations made within the territorial limits of Canada and
the United States.
Warranty service procedure
Only authorized MINI ULTRA dealers are permitted to perform warranty obligations. The
owner or its contractor must provide Thermo 2000’s head office or authorized depot with
defect unit together with the following information: MINI ULTRA model and serial number,
copy of the original sales receipt and owner’s identification certificate.
BTH Electric Boilers USE & CARE MANUAL
THERMO 2OOO INC.
500, 9e Avenue, Richmond (Qc) Canada J0B 2H0
Phone: (819) 826-5613 Fax: (819) 826-6370
www.thermo2000.com
(Revision Oct. 2009), Page
16
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