LAARS Mini-Therm II JVT (Sizes 50-225) - Install and Operating Manual - Manual (Page 31)

Mini-Therm II Hydronic Boiler Page 31
Heat Distribution Units
Transfers heat from the water supplied by the boiler to
the area to be heated through the use of baseboard,
convector, radiator, finned tube. Also known as
"radiation."
Isolation Valve
Used to isolate the boiler from the circuit. It minimizes
the amount of water drained from the system.
Primary-Secondary Piping
Two or more interconnecting circulating loops, each
with its own pump.
Reverse-return Piping
Balanced, equal flow (first in, last out) piping. Utilized
with multiple boilers and/or radiation. Applied with
single system pumps, or primary-secondary pumps.
Side Wall Power Venter
This Laars accessory allows the boiler exhaust to be
routed horizontally through an adjoining outside wall,
rather than gravity venting with a chimney or stack
when local codes allow.
System Purge Valve
A device used to purge air from the circuit. Should be
located as close as possible to the cold water feed,
but not immediately after the cold water feed.
Trunk
The section of piping which connects the boiler return
and supply with the branch(es). Also known as a
"main" or "header." Should be same size as boiler
inlet/outlet connections.
Vent Damper (optional in Canada)
Standard on JV boilers. This energy-saving device
prevents heated air from exiting the open vent when
the boiler is not operating.
Zone Pump
Circulators installed in branch piping that divert hot
water coming from the boiler into various areas
(zones) of a building.
Zone Valve
Diverts hot water from the boiler into various areas
(zones) of a building.
SECTION 11.
Replacement Parts
11.1Ordering Information
To order or purchase parts for the Laars Mini-
Therm II JVS or JVT boiler, contact your nearest
Laars Representative. If you need assistance in finding
a local dealer or distributor, contact the Technical
Service Department.
NOTE: To supply the correct part it is important that
you state the model number, serial number and type
of gas when applicable. This information is on the
rating plate on the heater.
11.2Parts List
The following three pages contain a parts list and
a general exploded view to aid in parts identification.
Please refer to these pages when ordering parts for
your JVS or JVT boiler.