Sterling RT - Manual (Page 11)

11
The appliance and its individual shutoff valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
excess of 1/2 psi (3.5 kPa).
The appliance must be isolated from the gas supply
piping system by closing the individual manual shutoff
valve during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 psi
(3.5 kPa).
For additional gas piping information, including pipe
sizing and drip leg installation, refer to Outdoor Rooftop
Gas-Fired Duct Furnace Installation and Service Manual.
For additional piping information, refer to the National
Fuel Gas Code Z233.1 (latest edition).
NOTICE: If the gas duct furnace is to be fi red with
LP gas, consult local LP gas dealer for piping size
information.
NOTICE: UNIT INSTALLATION FOR USE WITH
PROPANE (BOTTLED) GAS MUST BE MADE BY A
QUALIFIED LP GAS DEALER OR INSTALLER. HE
WILL INSURE PROPER JOINT COMPOUNDS ARE
USED FOR MAKING PIPE CONNECTIONS; THAT AIR
IS PURGED FROM LINES; THAT A THOROUGH TEST
IS MADE FOR LEAKS BEFORE OPERATING THE
UNIT; AND THAT IT IS PROPERLY CONNECTED TO
PROPANE GAS SUPPLY SYSTEM.
Before any connection is made to an existing line supplying
other gas appliances, contact the local gas company to
make certain that the existing line is of adequate size to
handle the combined load.
Check all connections for leaks with soap solution.
Never use an open fl ame to detect
gas leaks. Explosive conditions may exist which
would result in personal injury or death.
MODULATING GAS CONTROL (OPTIONAL)*
*Also refer to Outdoor Duct Furnace Installation Manual
supplied with your unit.
Electronic: On units equipped with electronic modulating
control, follow control manufacturer’s installation
instructions for sensing of outlet air temperature.
ELECTRICAL CONNECTIONS
HAZARDOUS VOLTAGE!
DISCONNECT ALL ELECTRIC
POWER INCLUDING REMOTE
DISCONNECTS BEFORE
SERVICING. Failure to
disconnect power before
servicing can cause severe
personal injury or death.
All electrical connections must conform to the latest
edition of ANSI/NFPA No. 70 National Electrical Code
and applicable local codes. In Canada, to the Canadian
Electrical Code, Part I CSA Standard C22.1.
The rooftop packaged unit is wired at the factory and
ready to be connected. Actual unit wiring will differ
according to the options chosen. Each unit is shipped
with its own wiring diagram; refer to this wiring diagram
for all electrical connections to the unit.
All electrical connections, line voltage and thermostat,
are made in the Electrical Cabinet (See Figure 9). Line
voltage connections are made at the High Voltage
Terminal Block. Thermostat connections are made at the
Main Connection Board (See Figure 10).
Do not use any tools (i.e. screwdriver,
pliers, etc.) across terminals to check for power. Use
of a voltmeter is recommended.