THERMO 2000 MINI Ultra 6, MINI Ultra 12, MINI Ultra 9 Installation & Operating Manual

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.

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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.

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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

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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.

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