User Manual

Serengeti-IR
™
Installation, Operation & Service
Combustion Research Corporation Page 23
GENERAL
The requirements and practices described below are
based on the National Electrical Code ANSI/NFPA No. 70
(current standard) and the Canadian Electric Code.
Although the requirements are uniform throughout the
country, local electrical codes may deviate from the
National Electrical Code and the Canadian Electric Code,
therefore, local inspection authorities should be consulted
regarding local requirements.
WARNING
ELECTRICAL SHOCK
DANGER OF SEVERE INJURY
OR DEATH
Field wiring to the heater and vacuum exhauster must
be connected and grounded in accordance with
national, state, provincial, local codes and to the
guidelines outlined in this manual. In the United States
refer to the most current revisions to the ANSI/NFPA
70 Standard and in Canada refer to the most current
revisions to the CSA C22.1 Part I Standard.
BURNER ASSEMBLY
Safety control circuits must be a two wire circuit with a
separate earth ground, and have a nominal voltage not
exceeding 125 volts. A safety control or protection device
must be connected so as to interrupt the ungrounded
conductor. Install a service disconnect within 3' of the
SERENGETI-IR
™
Burner Assembly.
The SERENGETI-IR
™
Burner Assembly shall be
connected to a power supply branch circuit fused at not
more than the value appropriate for the rating of any
control or device included in the circuit.
The SERENGETI-IR
™
Burner Assembly electrical
requirements are 1.8 FLA amps at 115V, 60 Hz. It is
recommended that the thermostat be installed on the hot
(L1) side with a sufficiently fused electrical supply line.
DO NOT RUN THE ELECTRICAL SUPPLY LINES
DIRECTLY ABOVE THE REFLECTOR OR BELOW THE
REFLECTOR - CLEARANCE TO COMBUSTIBLES
MUST BE MAINTAINED.
NOTE: If any of the original wire as supplied with the
appliance must be replaced, it must be replaced with
wiring material having a temperature rating of at least
90°C.
Field wiring having a minimum rating of at least 90°C shall
be used and supply circuit wiring shall have a minimum
size of 14AWG.
Large enough wire must be used in connecting to the
SERENGETI-IR
™
Burner Assembly. This is necessary for
two reasons: 1) carrying capacity and 2) voltage drop.
The wire size necessary to provide carrying capacity
without over heating is determined by electrical codes
which specify a minimum wire size for the amperage used.
Most electrical supply problems are caused by voltage
drop due to long runs, or low voltage supplied by the
utility.
The correct size wire should be carefully selected before
the installation is made. The first step is to establish what
voltage will be supplied by the utility. This will vary across
the country and should be verified by the utility and by
actual measurement of the supply voltage prior to
installation. The following chart shows maximum wire
lengths which will keep the voltage drop to a minimum of
10% at various currents at 115V. Only copper wiring
should be used.
WIRE LENGTH FOR 10% VOLTAGE DROP
IN FEET - 115V 60HZ
COPPER WIRE SIZE
AMPERES No.14 No.12 No.10 No. 8
15 150 225 350 600
20 110 175 275 450
25 90 140 225 350
30 75 125 150 300
35 - 100 135 250
40 - 85 125 225
45 - - 110 200
50 - - - 175
When supplying single phase from a three phase system,
use a suitably sized machine tool transformer to transform
460V or 230V three phase to 115V single phase. Under
no circumstances use 277V single phase input.
WARNING: Do not use 277 volt.
ELECTRICAL INFORMATION
!