Re-Verber-Ray LD Series Installation Manual page 31

LD Series
• Test and confirm that inlet pressures are correct. Refer to the heater rating plate for gas type and
the required minimum and maximum pressures (see Chart 3.8). The gas supply pipe must be of
sufficient size to provide the required capacity and inlet pressure to the heater (if necessary,
consult the local gas company). Do not exceed the maximum allowed pressures for the heater,
the space or the gas piping system.
Chart 3.8 Manifold Pressure
Type of
Gas
Natural
Liquefied Petroleum
NOTE: Check manifold pressure at the tap on the gas valve. Small variations in manifold pressure
(actual vs. published) may exist due to changing atmospheric conditions. Readings will be above
atmospheric pressure.
Pressure Equivalents: 1 Inch W.C. equals .058 oz/sq. in. equals 2.49 mbar.
To connect the gas:
Failure to install, operate or service this appliance in the approved manner may result in
property damage, injury or death. Only trained, qualified gas installation and service
personnel may install or service this equipment.
The installation must conform with local building codes or, in the absence of such codes, the National Fuel
Code (NFPA 54) and in conjunction with ANSI Z21.24/CSA 6.10 "Connectors for Gas Appliances".
IMPORTANT! The heating system will expand and contract during operation. Allowances for expansion
must be made between the connection to the heater and the gas supply. Excessive bending, kinks,
twists or vibration must be avoided. A flexible gas connection of approved type is required. Flexible
stainless steel gas connectors installed in one plane, and without sharp bends, kinks or twists is
recommended.
The gas pipe and connection must be supported independently. Do not install gas supply line in a
manner that bears the weight of the heater. Connect the main gas supply line with an approved flexible
connector (Figure 3.29) or, if national or local codes require rigid piping, a swing joint. Heater shall not be
connected to the building piping system with rigid pipe or semi-rigid metallic tubing, including copper.
When using such material, an intermediate connection device that allows for heater expansion must be
used.
The gas outlet must be in the same room as the appliance and accessible. It may not be concealed within
or run through any wall, floor or partition. When installing the heater in a corrosive environment (or near
corrosive substances), use a gas connector suitable for the environment. Do not use the gas piping
system to electrically ground the heater.
Install a sediment trap / drip leg if condensation may occur at any point of the gas supply line. This will
1
decrease the possibility of loose scale or dirt in the supply line entering the heater's control system
and causing a malfunction. NOTE: High pressure gas above 14 Inches W.C. (water column pressure)
requires a high pressure regulator and ball valve.
Required Manifold
Pressure
3.5 Inches W.C.
10.0 Inches W.C.
WARNING
!
31
3.0
Minimum Inlet
Pressure
5.0 Inches W.C.
11.0 Inches W.C.
Installation
• Gas Supply
Maximum Inlet
Pressure
14.0 Inches W.C.
14.0 Inches W.C.