Installing Gas Piping - NY Thermal Trinity Lx-WH Series Installation And Operation Manual

Lx – WH Series
7.0

INSTALLING GAS PIPING

Trinity Lx Water Heaters are factory set to operate with Natural Gas; BEFORE
OPERATING WITH PROPANE, the boiler must be converted using the appropriate
Natural to LP Conversion Kit; see Table 7-1. Failure to properly convert the unit to
safely operate with Propane will cause dangerous burner operation, resulting in property
damage, serious injury or death.
Liquefied Petroleum (LP) propane gas is heavier than air. Do not install the boiler in a pit
or similar location that will permit heavier than air gas to collect. Check with Local
Codes as they may require boilers fueled with LP gas to be provided with an approved
means of removing unburned gases from the room. Failure to follow these instructions
may result in serious injury or death
Table 7-1 Natural Gas to LP Propane Conversion Kit
Model Number LP Conversion Kit Number
Lx200WH
Lx300WH
Lx400WH
Lx500WH
Notes:
1
No LP orifice is used with model Lx500WH, see conversion kit instructions
for information on adjusting the throttle screw convert water heater to LP.
2 Models Lx600WH-Lx800WH cannot be operated with LP – Propane. Use
Natural Gas only.
Installation
Refer to the current National Fuel Gas Code ANSI Z223.1/NFPA 54 or CAN/CGA B149.1 installation codes,
and local codes for gas piping requirements and sizing. Pipe size running to the unit depends on:
 Length of pipe.
 Number of fittings.
 Type of gas.
 Maximum input requirement of all gas appliances in the residence.
Ensure that:
 The gas line connection to the water heater does not apply any weight to the gas valve. NTI recommends
using approved flexible gas piping (if acceptable by local codes) to connect the water heater to the gas
supply (See Figure 7-1 for details).
 You plan the installation so that the piping does not interfere with the vent pipe, or the removal of the valve,
burner, and serviceable components.
 The water heater shall be installed such that the gas ignition system components are protected from water
(dripping, spraying, rain etc.) during installation and servicing.
 The gas piping is large enough for all the appliances in the home. No appreciable drop in line pressure
should occur when any unit (or combination of units) lights or runs. Use common gas-line sizing practices.
 Always use a pipe-threading compound that is resistant to propane (LP) gas solvent action. Apply sparingly
to all male threads, starting at two threads from the end. Over doping or applying dope to the female end,
can result in a blocked gas line.
 DO NOT TIGHTEN FITTINGS WITHOUT SUPPORTING THE GAS VALVE as damage to the gas valve
or combustion blower can occur.
 Install a manual "Equipment Shut-Off Valve" as shown in Figure 7-1. Valve must be listed by a nationally
recognized testing lab.
 The gas line piping can safely be removed from the water heater for servicing, by strategically placing the
gas line shutoff and union; see example in Figure 7-1.
 All gas piping, including gas components in the water heater, are checked for leaks using a "Bubble Test",
prior to operating the water heater.
Installation and Operation Manual
82650-1
82650-1
83017-1
84386-1
LP Orifice
52 (5.2 mm)
62 (6.2 mm)
62 (6.2 mm)
1
No Orifice
│
Trinity Lx-WH
31