THERMO 2000 MINI BTH 3, MINI BTH 6, MINI BTH 4.5, MINI BTH 7.5, MINI BTH 9 Installation & Operation Manual

Electric Boilers

MINI BTH

M

odels from 3 kW to 12 kW :

208/240V single phase

INSTALLATION & OPERATING MANUAL

Your MINI BTH 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: June 2014

Printed in Canada

BTH Electric Boilers USE & CARE MANUAL

(Revision Jun 2014)

, Page 2.

Ratings & Specifications at 240** Vac / 1ph (3 wires L1-N-L2) :

MINI BTH

Cable**!

90C/240V

Breaker!

**

Model Capacity*

KW/BTU/H

at 240V

Amps!*
at 240V

Electric

Element(s)

240V

Stage(

s) Cu Al

Amp. at

240V

MINI BTH 3 3 / 10,235 12.5 1 x 3 KW 1 12 10 20

MINI BTH 4.5 4.5 / 15,350 18.7 1 x 4.5 KW 1 12 10 25

MINI BTH 6 6 / 20,470 25 1 x 6 KW 1 8 6 40

MINI BTH 7.5 7.5 / 25,590 31 1X4.5+1X3KW 2 8 6 40

MINI BTH 9 9 / 30,710 37.5 2 x 4.5 KW 2 8 6 50

MINI BTH 12 12 / 40,940 50 2 x 6 KW 2 6 6 70

-Electric supply 120/240V or 120/208V 1 phase (L1-N-L2) with three conductors anc a ground

-Copper or Aluminum conductors can be used.

! Add the amperage (Max. 5amp) of the circulating pump if it is connected directly to the boiler
* On applications working at 208V/1ph, multiply the capacity by .75 and the amperage by .87
** A higher capacity cable could be required. In all cases the local Electrical Code has priority.

Dimensions

Connections Overall dimensions

Inlet/heating return 3/4 “ NPT Fem. Height 21-1/2 in.

Outlet/ heating supply 3/4 “ NPT Fem. Width 9in.

Pressure relief valve 3/4 “ NPT Fem. Depth 9 in.

Drain valve 3/4 “ NPT Fem. Shipment weight 40 lbs.

Operating temp. range: 50°F to 190°F. Maximum pressure : 30 psi
Boilers requiring to be built in conformity to ASME standards may be required in some
provinces or state. If such models are required, model with an “H” suffix shall be used.

Figure 1.

BTH Electric Boilers USE & CARE MANUAL

(Revision Jun 2014)

, Page 3.

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

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.
Boilers requiring to be built in conformity to
ASME standards may be required in some
provinces or state. If such models are required,
model with an “H” suffix shall be used

SECURITY CONSIDERATIONS

Domestic and commercial installations have a
maximum design operating pressure limited to
30 psi by a safety relief valve.

Boiler maximum operating temperature is 190°F
by design. This boiler is designed to be used

only in a hot water heating system.

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).

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.

!

WARNING

!

CAUTION

!

BTH Electric Boilers USE & CARE MANUAL

(Revision Jun 2014)

, Page 4.

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

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.

The boiler can be mounted directly on a wall
with adequate screws. Make sure it is properly
leveled.
All models in alcoves. The ambient temperature
must not exceed 90F
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:

Sides 4 inches

Electric elements side 14 inches

Front side of the boiler 24 inches

Back

0 inch

***

In Position #6 on models 3 to 6kW, the heating element must be relocated as shown.

Fig. 2 Mounting positions

CAUTION

!

WARNING

!

Original location

New location