LAARS Mini-Therm JVi - Install and Operating Manual - Manual (Page 4)

Mini-Therm JVi Page 3
Size
15°F 8°C 20°F 11°C 25°F 14°C
Flow Rate Headloss Flow Rate Headloss Flow Rate Headloss
gpm l/s ft m gpm l/s ft m gpm l/s ft m
50 5.3 0.3 0.3 0.1 4.0 0.3 0.2 0.1 3.2 0.2 0.1 0.0
75 8.0 0.5 0.6 0.2 6.0 0.4 0.3 0.1 4.8 0.3 0.2 0.1
100 10.7 0.7 1.3 0.4 8.0 0.5 0.7 0.2 6.4 0.4 0.5 0.2
125 13.3 0.8 2.2 0.7 10.0 0.6 1.3 0.4 8.0 0.5 0.8 0.2
160 17.0 1.1 2.5 0.8 12.8 0.8 1.8 0.5 10.2 0.6 1.2 0.4
225 24.0 1.5 5.0 1.5 18.0 1.1 3.1 0.9 14.4 0.9 1.9 0.6
is printed on the back cover of this manual. 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. Some accessory items are shipped
in separate packages. Verify receipt of all packages
listed on the packing slip. Inspect each item 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. Heater Identification
Consult the rating plate on the boiler. The
following example simplifies the heater identification:
1 2 3 4 5 6
JV H 125 N C S
Table 1. Heater Identification.
1. Basic boiler series model
2. Ignition system: (H) Hot surface pilot ignition
3. Input rate X 1000 BTU/Hr
4. Gas Type: (N) Natural (P) Propane
5. Firing rate: (C) On/off, induced draft
6. Options: (S) Standard, (P) with Pump,
(A) Extra Aquastat
1D. Flow Requirements
All high recovery, low volume water boilers
must have adequate flow for proper operation. Pump
selection is critical to this goal, and pumps should be
selected to provide for correct system design water
temperature rise. Table 2 details temperature rise and
water flow for the Mini-Therm boilers.
SECTION 1.
General Information
WARNING
The JVi induced draft 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 inducer assembly 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 the
Laars Model JVi induced draft, low pressure, copper
tube hydronic boilers. These boilers are available in
two configurations; the JVH has a hot surface pilot
ignition system and the JVP 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.
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 JVi induced draft boilers are
covered by a limited warranty. A copy of the warranty
Table 2. Temperature Rise (degrees °F, degrees °C).
gpm = Water Flow in gallons per minute. l/s = Water flow in liters per second.
ft = Pressure drop (headloss) through the boiler in feet of water. m = Pressure drop (headloss) through the boiler in meters of water.
Note: Shaded area is the recommended flow and temperature rise.