York D1NA018 Combustion Discharge, GAS Piping, GAS Connection, Drip LEG, External SHUT-OFF

Scroll compressors operate in one direction only. If a three phase scroll compressor is experiencing:

• Low amperage draw

• Similar discharge and suction pressures

• Increased noise level

then the compressor is operating in reverse. To correct this condition, switch any two (2) line voltage leads at the contactor. Please note, single phase scroll compressor will start and run in one direction only. The reverse operation is not a concern.

COMBUSTION DISCHARGE

TABLE 2 - NATURAL GAS APPLICATION DATA

Input	Output		Available		Gas	Number	Temp. Rise ° F
Capacity	Capacity		On		Rate1	of	At Full Input2
(Mbh)3	(Mbh)		Models		Ft.3/Hr.	Burners	Min.	Max.
		1 1
45	36	12,32,122, 3 &			42	2	25	55
				TON
70	56	2	& 2	TON	65	3	30	60
		3	&	TON	65	3	25	55
				1
90	72	3	& 3	2TON	84	4	30	60
80	64	4 & 5 TON			74	3	25	55
108	86	4 & 5 TON			100	4	30	60
135	108	4 & 5 TON			126	5	35	65

1 Based on 1075 BTU/Ft.3.

2 The air flow must be adjusted to obtain a temperature rise within the range shown. Continuous return air temperatures should not be below 55°F.

3 Heating capacity valid for elevations up to 2000 feet above sea level. For elevations above 2000 feet, rated capacity should be reduced by 4% for each 1000 feet above sea level.

TABLE 3 - PROPANE (LP) GAS APPLICATION DATA

Input	Output		Available		Gas	Number	Temp. Rise ° F
Capacity	Capacity		On		Rate1	of	At Full Input2
(Mbh)3	(Mbh)		Models		Ft.3/Hr.	Burners	Min.	Max.
		1 1
45	36	12,32,122, 3 &			18	2	25	55
				TON
70	56	2	& 2	TON	28	3	30	60
		3	&	TON	28	3	25	55
				1
90	72	3	& 3	2TON	36	4	30	60
80	64	4 & 5 TON			32	3	25	55
108	86	4 & 5 TON			43	4	30	60
135	108	4 & 5 TON			54	5	35	65

1 Based on 2500 BTU/Ft.3.

2 The air flow must be adjusted to obtain a temperature rise within the range shown. Continuous return air temperatures should not be below 55°F.

3 Heating capacity valid for elevations up to 2000 feet above sea level. For elevations above 2000 feet, rated capacity should be reduced by 4% for each 1000 feet above sea level.

4 Propane applications are accomplished by field installation of a Propane Conversion Accessory, Model 1NP0805 for 1.5 thru 3.5 ton units and Model 1NP0806 for 4 and 5 ton units.

035-18265-001-A-0202

GAS PIPING

Proper sizing of gas piping depends on the cubic feet per hour of gas flow required, specific gravity of the gas and the length of run. “National Fuel Gas Code” Z223.1 or CAN/CGA B149.1 or

.2 should be followed in all cases unless superseded by local codes or gas company requirements. Refer to Tables 4 and 5.

The heating value of the gas may differ with locality. The value should be checked with the local gas utility.

NOTE: There may be a local gas utility requirement specifying a minimum diameter for gas piping. All units require a 1/2 inch pipe connection at the gas valve.

GAS CONNECTION

The gas supply line can be routed through the hole located on

the left side of the unit. Refer to Figure 5 to locate these access

openings. Typical supply piping arrangements are shown in Figure 2.

11AUTOMATIC GAS VALVE

1212 2x 2UNION

xGAS COCK

12- 14 NPT

DRIP LEG

FIG. 2 - EXTERNAL SUPPLY CONNECTION

EXTERNAL SHUT-OFF

Gas piping recommendations:

1.A drip leg and a ground joint union must be installed in the gas piping.

2.When required by local codes, a manual shut-off valve may have to be installed outside of the unit.

TABLE 4 - NATURAL GAS PIPE SIZING CHART

Length		Nominal Inches Iron Pipe Size
in	1/2 in.		3/4 in.	1 in.	1-1/4 in.
Feet
10	132		278	520	1,050
20	92		190	350	730
30	73		152	285	590
40	63		130	245	500
50	56		115	215	440
60	50		105	195	400
70	46		96	180	370
80	43		90	170	350
90	40		84	160	320
100	38		79	150	305

Maximum Capacity of Pipe in Cubic Feet of Gas Per Hour (Based Upon A Pressure Drop of 0.3 Inch Water Column and 0.6 Specific Gravity Gas).

TABLE 5 - PROPANE (LP) GAS PIPE SIZING CHART

Length		Nominal Inches Iron Pipe Size
in	1/2 in.		3/4 in.	1 in.	1-1/4 in.
Feet
10	275		567	1,071	2,205
20	189		393	732	1,496
30	152		315	590	1,212
40	129		267	504	1,039
50	114		237	448	913
60	103		217	409	834
70	96		196	378	771
80	89		185	346	724
90	83		173	322	677
100	78		162	307	630

Maximum Capacity of Pipe in Thousands of BTU Per Hour (Based Upon A Pressure Drop of 0.5 Inch Water Column).

Unitary Products Group 5