Goodman GMPN, Инструкция по установке и эксплуатации, Страница: 13 / 25

IO-151 13
Interconnecting wiring must be secured and protected from damage or disconnection. The use of
solderless connectors or equivalent is recommended. The low voltage control wiring exiting the
furnace is labeled “thermostat wiring”.
SETTING THE HEAT ANTICIPATOR
The following method should be used in measuring the amp draw of the control circuit to assure
proper adjustment of the thermostat heat anticipator
RATING THE FURNACE
This furnace is shipped from the factory equipped for use with natural gas. The instructions are
for use with natural gas at altitudes up to 2,000 feet, using a heating value of 1,000 Btu/hr. Should
this appliance be converted to LP, refer to the instructions included in the factory authorized LP
Conversion Kit
(LPM-01) . If for use at altitudes in excess of 2,000 feet refer to the instructions
included in the factory authorized High Altitude Kit (HA-02).
It is important to check and adjust the input rate of the furnace to prevent an overfiring situation.
Overfiring can cause premature heat exchanger failure. The input is controlled by the supply
pressure, orifice size, manifold pressure and heating (calorific) value of the gas.
The supply pressure must be measured with this and all other gas burning appliances in
operation. The supply pressure must be adjusted to the pressure range stated on the series and
rating plate. Applications for altitudes in excess of 2,000 feet require an orifice change. The
orifices must be selected using the table below.
The furnace derate is 4% for each 1,000 feet
above sea level . This table is based upon a heating value of approximately 1,000 Btu/ft
3
ALTITUDE NAT. GAS ORIFICE SIZE
0 - 2,000 #45
3,000 #47
4,000 #47
5,000 #47
R
R
Wrap the “R” leg around a clip-on
amp meter 10 times.
Energize the furnace in the
heat mode. Record the reading.
Divide this reading by
10. Set the heat anticipator
on the thermostat to match
this reading.
EXAMPLE:
If the reading on the amp meter is
“4”, divide this by 10.
The anticipator setting will be .4
amps.
CONDENSER
THERMOSTAT
BLUE
WHITE
RED
GREEN
PURPLE
PURPLE
YELLOW
Y
W
R
G
FURNACE