Lennox International Inc Gas Packaged Units, 15GCSX Heating Start−Up, Normal Operating Pressures

Table 8

Normal Operating Pressures

80°F db / 67°F wb RETURN AIR					Air Temperature Entering Outdoor Coil (°F)
UNIT	PRESSURE	65	70	75	80	82	85	90	95	100	105	110	115
15GCSX−24		142	143	144	146	146	147	148	149	150	151	152	153
15GCSX−30		134	136	138	140	141	142	144	146	148	149	151	152
15GCSX−36	Suction	143	144	146	147	148	149	151	152	155	155	157	157
15GCSX−42		140	140	140	141	141	141	142	142	143	144	145	147
15GCSX−48		133	134	136	137	138	139	139	140	141	142	144	145
15GCSX−60		134	136	138	140	141	142	144	145	147	148	150	151
15GCSX−24		219	242	264	287	296	310	333	355	379	398	430	457
15GCSX−30		232	255	277	300	309	323	345	368	390	408	440	470
15GCSX−36	Liquid	244	268	292	316	326	340	363	369	410	429	461	493
15GCSX−42		225	247	269	291	300	314	337	357	383	402	434	457
15GCSX−48		236	256	277	297	305	320	344	370	393	412	449	480
15GCSX−60		246	269	291	314	323	337	360	385	407	424	457	484

Heating Start−Up

Pre−Start Check List:

1 − Check the type of gas being supplied. Be sure it is the same as listed on the unit nameplate.

2 − Make sure the vent hood has been properly installed.

FOR YOUR SAFETY READ BEFORE LIGHTING

BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell around the base of the unit because some gas is heavier than air and will settle down low.

!WARNING

Electric shock hazard. Can cause injury or death. Do not use this unit if any part has been under water. Immediately call a qualified service technician to inspect the unit and to replace any part of the con- trol system and any gas control which has been under water.

!WARNING

Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch(es). Unit may have multiple power supplies.

Use only your hand to turn the gas valve knob. Never use tools. If the knob will not move by hand, do not try to repair the gas valve. Call a qualified service technician. Force or attempted repair may result in a fire or explosion.

This furnace is equipped with a direct ignition control. Do not attempt to manually light the burners.

1 − Turn off electrical power to unit.

2 − Set thermostat to lowest setting.

3 − Turn the gas valve knob to the ON position. Refer to figure 13.

4 − Turn on electrical power to unit.

5 − Set room thermostat to desired temperature. (If thermostat setpoint temperature is above room temperature after the pre−purge time expires, main burners will light).

!WARNING

Danger of explosion and fire. Can cause injury or product or property damage. You must follow these instructions exactly.

!WARNING

Danger of explosion. Can cause injury or product or property damage. If overheating occurs or if gas supply fails to shut off, shut off the manual gas valve to the appliance before shutting off electrical supply.

Honeywell VR8205 Series Gas Valve

HIGH FIRE

ADJUSTING SCREW (under cap)

OUTLET

(MANIFOLD)

PRESSURE

TAP

LOW FIRE ADJUSTING SCREW (under cap)

INLET PRESSURE TAP

GAS VALVE SHOWN IN OFF POSITION

Figure 13

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