Desa 125-R - Manuel (Page 4)

www.desatech.com 114248-01B 4
GAS SUPPLY
PROPANE/LP GAS MODEL 125-R ONLY
Propane gas and propane tank(s) are to be fur-
nished by the user.
Use this heater only with a propane vapor
withdrawal supply system. See Chapter 5 of the
Standard for Storage and Handling of Liquefied
Petroleum Gas, ANSI/NFPA 58 and/or CAN/CGA
B149.2. Your local library or fire department will
have this booklet.
The amount of propane gas ready for use from
propane tanks varies. Two factors decide this
amount.
1. The amount of liquid propane gas in tank(s)
2. The temperature of tank(s)
The chart below shows the minimum number of 45
kg (100 lb) tanks needed to run the heater. Connect
tanks together with a manifold.
Average Temperature Number Of Tanks
°C (°F) At Tank Location 45 kg (100 lb)
4° (40°) to 0° (32°) 2
Below 0° (32°) 3
Less gas is vaporized at lower temperatures. Your
local propane gas dealer will help you select the
proper supply system.
NATURAL GAS MODEL 125-RN ONLY
The user must furnish the natural gas supply and
the connections to the heater.
Regulate the natural gas supply down from a mini-
mum 7" w.c. to a maximum of 1/2 psi. The natural
gas supply capacity should be able to supply a
minimum of 125 cubic feet of gas at pressure for
each heater connected to the system.
Consult your natural gas supplier for proper sizing
of the natural gas supply lines.
Follow all local ordinances and codes. In the ab-
sence of local ordinances and codes, refer to the
National Fuel Gas Code Handbook, NFPA54/ANSI
Z223.1 and the Natural Gas Installation Code, CAN/
CGA B149.1 .
VENTILATION
WARNING: Provide at least
a .35 m 2 (3.75 ft 2 ) opening of
fresh, outside air while running
heater. If proper fresh, outside
air ventilation is not provided,
carbon monoxide poisoning
can occur. Provide proper fresh,
outside air ventilation before
running heater.
INSTALLATION
INSTRUCTIONS
Read these instructions care-
fully. Read and adhere to these
instructions. Do not allow any-
one who has not read these
instructions to assemble, light,
adjust or operate this heater.
Do not attempt to operate the
heater with any gas other than
that indicated on the heater
nameplate.
For the U.S. and/or Canada, the installation of this
appliance must comply with local and/or Provin-
cial codes or, in the absence of these codes, with
the (U.S.) National Fuel Gas Code, ANSI Z223.1
– Latest Edition (for natural and propane/LP gas
operation) and with the (U.S) Standard for the
Storage and Handling of Liquefied Petroleum
Gases, ANSI/NFPA 58 (for propane/LP gas opera -
tion) or with the current (Canadian) CAN/CGA
B149.1 and B149.2 installation codes.
This heater (including hose and regulator assembly
if applicable) must be inspected before each use
and at least annually by a qualified service person.
If the hose for model 125-R shows evidence of
excessive abrasion or wear or if the hose is cut, it
must be replaced prior to the heater being put into
operation. The replacement hose assembly shall be
that specified by the manufacturer.