York D2NA060 User Manual
Scroll compressors operate in one direction only. If a three
phase scroll compressor is experiencing:
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.
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
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.2 should be followed in all cases unless superseded by local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.
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.2 should be followed in all cases unless superseded by local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.
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.
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.
the left side of the unit. Refer to Figure 5 to locate these access
openings. Typical supply piping arrangements are shown in
Figure 2.
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.
035-18265-001-A-0202
Unitary Products Group
5
FIG. 2 - EXTERNAL SUPPLY CONNECTION
EXTERNAL SHUT-OFF
1
2
1
2
x
UNION
1
2
1
2
x
GAS COCK
AUTOMATIC
GAS VALVE
GAS VALVE
1
2
- 14 NPT
DRIP LEG
Input
Capacity
(Mbh)
3
Output
Capacity
(Mbh)
Available
On
Models
Gas
Rate
1
Ft.
3
/Hr.
Number
of
Burners
Temp. Rise
°
F
At Full Input
2
Min.
Max.
45
36
1
1
2
, 2,
2
1
2
, 3 &
3
1
2
TON
42
2
25
55
70
56
2 &
2
1
2
TON
65
3
30
60
3 &
3
1
2
TON
65
3
25
55
90
72
3 &
3
1
2
TON
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.
level.
TABLE 2 - NATURAL GAS APPLICATION DATA
Input
Capacity
(Mbh)
3
Output
Capacity
(Mbh)
Available
On
Models
Gas
Rate
1
Ft.
3
/Hr.
Number
of
Burners
Temp. Rise
°
F
At Full Input
2
Min.
Max.
45
36
1
1
2
, 2,
2
1
2
, 3 &
3
1
2
TON
18
2
25
55
70
56
2 &
2
1
2
TON
28
3
30
60
3 &
3
1
2
TON
28
3
25
55
90
72
3 &
3
1
2
TON
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.
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.
ton units.
TABLE 3 - PROPANE (LP) GAS APPLICATION DATA
Length
in
Feet
Nominal Inches Iron Pipe Size
1/2 in.
3/4 in.
1 in.
1-1/4 in.
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).
of 0.3 Inch Water Column and 0.6 Specific Gravity Gas).
TABLE 4 - NATURAL GAS PIPE SIZING CHART
Length
in
Feet
Nominal Inches Iron Pipe Size
1/2 in.
3/4 in.
1 in.
1-1/4 in.
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).
of 0.5 Inch Water Column).
TABLE 5 - PROPANE (LP) GAS PIPE SIZING CHART