Install Instructions

MINI-THERM JV
Page 15
4. A sediment trap (drip leg) must be installed
ahead of the gas controls (see Figure 8). Fit the
trap with a threaded cap which can be removed
for cleaning.
5. Install a manual gas shutoff valve for service and
safety. Do not use a restrictive gas cock. Flexible
gas connectors, if used, must be CSA rated for
the total input rating of the boiler.
6. Disconnect the boiler and its individual shutoff
valve from the gas supply system during pressure
testing of the system at pressures higher than 1/2
pounds per square inch (psi) (3.45 kilopascals
[kPa]). If the test pressure is equal to or less than
1/2 psi (3.45 kPa), close the manual shutoff valve
on the heater during the piping pressure test.
7. If the gas supply pressure is less than required,
check for undersized pipe between the meter and
the boiler, a restrictive tting, or an undersized
gas meter. Gas supply pressures to the heater are
listed in Table 5.
NOTE: The boiler and all other gas appliances sharing
the boiler gas supply line must be ring at maximum
capacity to properly measure the inlet supply pressure.
Low gas pressure could be an indication of an
undersize gas meter and/or obstructed gas supply line.
8. The correct high re burner manifold gas
pressure is stamped on the rating plate. The
regulator is pre-set at the factory, and normally
requires no further adjustment. For two-stage
units (JVS 100-225) be sure unit is able to re at
both high and low re.
9. Before operating the boiler, the complete gas
supply system and all connections must be tested
for leaks using a leak detector solution. Do not
use an open ame.
Caution
Some leak test solutions (including soap and
water) may cause corrosion or stress cracking.
Rinse the piping with water after testing.
Attention
Certaines solultions d’essai d’étanchéité (y
compris l’eau et le savon) peuvent causer de
la corrosion ou de la ssuration. Rincez les
tuyaux à l’eau apprès l’essai d’étanchéité.
WARNING
The Mini-Therm JVS and JVH boilers are
designed for use with either natural gas or LP
gas. Check the rating plate to be sure that the
boiler is designed to use the type of gas being
supplied. DO NOT ATTEMPT TO CONVERT
THIS HEATER FOR USE WITH ANY OTHER
TYPE OF FUEL.
AVERTISSEMENT
Les appareils de chauffage à faibles sont conçus
pour être utillsés avec du gaz naturel ou du gaz
de pétrole liquéé (GPL). Vériez l’information
inscrite sur la plaque signalétique du pour vous
assurer que l’appareil est conçu pour le type de
gaz fourni. NE PAS ESSAYER DE CONVERTIR
CET APPAREIL À UN AUTRE TYPE DE GAZ.\
4B Special Precautions for LP Gas
LP Gas is heavier than air and can therefore more
readily collect or “pool” in enclosed areas if provision
for proper ventilation is not made. Be sure to pay
special attention to proper ventilation for LP gas.
Locate boilers a safe distance from LP gas cylinders
and lling equipment. In the United States, consult
the “National Fuel Gas Code” ( NFPA 54 / ANSI
Z223.1, latest edition ) or in Canada, the Propane
Installation Code ( CSA-B149.2 ), any local codes and
re protection authorities about specic installation
restrictions in your area.
SECTION 5.
Water Connections
5A. Water Piping
Figure 10. shows ‘typical’ plumbing installations. Be
sure to provide unions and isolation valves at the
boiler inlet and outlet so it can be isolated for service.
Check local codes for specic plumbing requirements
before beginning the installation.
An ASME pressure relief valve is supplied on
all JV boilers, and is pre-set at 30 PSI. The valve
outlet piping must discharge to a drain. Under no
circumstances should the relief valve piping be a
closed circuit.
A pressure reducing valve (automatic feed) must be
used to maintain the system at constant proper pressure
(see Figure 10). Supply properly installed purge
valves to eliminate air from each circuit.
A drain valve is supplied with the boiler, and can be
found in the plastic bag shipped with each boiler. This
valve is to be installed on the lower right side of the
boiler and is used for draining the unit. To drain the
boiler completely, open the drain valve and remove