Mini-Therm II Hydronic Boiler
Page 3
SECTION 1.
General Information
WARNING
The JV hydronic boiler must be installed in
accordance with the procedures detailed in this
manual, or the Laars warranty will be voided. The
installation must conform to the requirements of the
local jurisdiction having authority, and, in the United
States, to the latest edition of the National Fuel Gas
Code, ANSI Z223.1. In Canada, the installation
must conform with the latest edition of CAN/CGA-
B149.1 OR .2 installation codes for gas burning
appliances, and/or local codes. Any modifications to
the boiler, its gas controls, gas orifices, wiring or
draft diverter may void the warranty. If field
conditions require modifications, consult the factory
representative before initiating such modifications.
1A. Introduction
This manual provides information necessary for
the installation, operation, and maintenance of Laars
Model JV copper tube hydronic boilers. These boilers
are available in two configurations; the JVT has a
thermocouple/continuous burning pilot, and the JVS
has an electronic intermittent ignition device (I.I.D.).
Look for the model designation on the rating plate,
which can be found on top of the boiler in the right
rear corner. If the unit is part of a Mini-Combo II
(model MC) Residential Gas-Fired Space/Water
Heater, refer also to Document 8001, Mini-Combo II
Installation and Operation Instructions.
The Laars automatic vent dampers are standard
on all U.S. models. The Laars side wall power venters
can be used on both JVS and JVT models. Special
instructions for their installation are included in the
vent damper and power venter package. Read them
carefully before installation.
All application and installation procedures
should be reviewed completely before proceeding with
the installation. Consult the Laars factory, or local
factory representative, with any problems or questions
regarding this equipment. Experience has shown that
most operating problems are caused by improper
installation.
1B. Warranty
The Laars Model JV boilers are covered by a
limited warranty. The owner should fill out the
warranty registration card and return it to Laars.
All warranty claims must be made to an
authorized Laars representative or directly to the
factory. Claims must include the boiler serial number
and model (this information can be found on the
rating plate), installation date, and name of the
installer. Shipping costs are not included in the
warranty coverage.
Figure 1. Vent Damper Installation.
Some accessory items are shipped in separate
packages. Verify receipt of all packages listed on the
packing slip. Inspect everything for damage
immediately upon delivery, and advise the carrier of
any shortages or damage. Any such claims should be
filed with the carrier. The carrier, not the shipper, is
responsible for shortages and damage to the shipment
whether visible or concealed.
1C. Field Assembly
1.
Mini-Therm II boilers have built-in draft diverter
for natural draft operation.
2.
Find the vent damper box which is located in the
boiler package (vent damper is optional in
Canada).
3.
Install the vent damper directly to the top of the
draft diverter outlet with the damper operator
facing to the front of the boiler, and with the
flow direction arrow pointing upward. Use the
vent damper wire harness provided with the
boiler to connect the vent damper to the boiler.
The bracket end of the harness should be
connected to the vent damper actuator.
4.
For Model JVS only: Install the metal plug
provided with the vent damper onto the damper
plate hole. Disregard the metal plug in case of
standing (continuous) pilot boilers. The damper
plate hole should never be blocked on all JVT
models.
Vent
Damper
(optional in
Canada)
Draft
Diverter
(built-in)
Vent
Damper
Harness
