Goodman [A/G]PG Service Instructions Manual Download

Page: 50 / 52

SERVICING

7. As the unit fires, the inclined manometer negative pressure

will drop to -1.0" ± 0.1" W.C.

8. If not as listed, replace control.

Note:

The pressure switch

must

be mounted with the diaphragm

in a vertical position.

S-311 HIGH ALTITUDE APPLICATION

High Altitude Derate - U.S. Installations Only (Optional)

High Altitude Derate is not required for proper operation. The
gas/electric units naturally derate with altitude. High Altitude
Derate kit may be installed if desired.

IMPORTANT NOTE:

The gas/electric units naturally derate

with altitude. Do not attempt to increase the firing rate by
changing orifices or increasing the manifold pressure. This
can cause poor combustion and equipment failure. At all
altitudes, the manifold pressure must be within 0.3 inches
W.C. of that listed on the nameplate for the fuel used. At all
altitudes and with either fuel, the air temperature rise must be
within the range listed on the unit nameplate. Refer to the
Installation Manual provided with the LP kit for conversion from
natural gas to propane gas and for altitude adjustments.

When this package unit is installed at high altitude, the appro-
priate High Altitude orifice kit may be installed. As altitude
increases, there is a natural reduction in the density of both
the gas fuel and combustion air. This kit will provide the proper
design certified input rate within the specified altitude range.
High altitude kits are not approved for use in Canada. For in-
stallations above 2,000 feet, use kit HA-02. The HA-02 kit is
used for both Natural and LP gas at high altitudes.

Use LPT-00A propane conversion kit for propane conversions
at altitudes below 2000 feet. Natural gas installations below
2000 feet do not require a kit.

For propane conversion above 2000 feet, high altitude kit HA-
02 is required in addition to the LPT-00A propane conversion
kit.

Natural gas and LP gas installations at altitudes > 2000 ft

2000

3000

4000

4500

5000

6000

7000

8000

U.S. BURNER ORIFICE

45/55 47/55 47/56

47/56 48/57 48/58 49/58

CANADA BURNER ORIFICE

45/55

48/57

2000

3000

4000

4500

5000

6000

7000

8000

U.S. BURNER ORIFICE

44/55 44/55 45/56

45/56 46/57 47/58 47/58

CANADA BURNER ORIFICE

44/55

47/57

2000

3000

4000

4500

5000

6000

7000

8000

U.S. BURNER ORIFICE

43/55 53/55 44/56

44/56 44/56 45/57 45/57

CANADA BURNER ORIFICE

43/55

46/57

ELEVATION ABOVE SEA-LEVEL (FEET)

20,000 BTUH NAT/20,OOO BTUH/L.P.

INPUT/BURNER

HIGH

ALTITUDE

KIT

HA02

HIGH

ALTITUDE

KIT

22,500 BTUH NAT/20,OOO BTUH/L.P.

ELEVATION ABOVE SEA-LEVEL (FEET)

HA02

INPUT/BURNER

25,000 BTUH NAT/20,OOO BTUH/L.P.

ELEVATION ABOVE SEA-LEVEL (FEET)

HIGH

ALTITUDE

KIT

S-313 TESTING IGNITION CONTROL MODULE

NOTE:

Failure to earth ground the unit, reversing the neutral

and hot wire connection to the line (polarity), or a high resis-
tance connection in the ground or neutral lines may cause the
control to lockout due to failure to detect flame.

The ground wire must run from the unit all the way back to the
electrical panel. Proper grounding can be confirmed by dis-
connecting the electrical power and measuring resistance be-
tween the neutral (white) connection and the burner closest to
the flame sensor. Resistance should be less than 10 ohms.

DSI Direct Spark Ignition Systems

NORMAL SEQUENCE OF OPERATION (DSI Direct Spark
Ignition System)

1. Thermostat calls for heat by energizing "W". The control

checks the pressure switch for open condition. If the pres-
sure switch is closed the control will flash code "3" and
wait for the pressure switch to open.

2. The induced draft motor is energized and the control flashes

code "2" and waits for the pressure switch to close. Once
the pressure switch is closed, the LED stops flashing and
the control begins timing the 15 second pre-purge.