28
NSZ/NDZ INSTALLATION MANUAL
Operating Parameters cont.
NDZ026 thru NDZ072 (with NAH Series Air Handler)
First Stage Operation
Cooling -- No Hot Water Generator
Entering
Water Temp
°F
Water Flow
GPM/Ton
NDZ026 thru NDZ064
NDZ072
NDZ026 thru NDZ072
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Superheat
Subcooling
Water Temp
Rise °F
Air Temp
Drop °F DB
50
1.5
130-150
193-230
130-150
200-245
8-16
7-14
7-20
18-24
3.0
128-153
190-230
125-140
205-240
8-16
3-10
9-14
18-25
70
1.5
130-150
238-282
135-150
240-280
6-16
4-16
9-18
18-25
3.0
130-155
238-262
125-145
245-270
6-18
5-11
5-10
18-24
90
1.5
133-148
308-340
130-155
300-365
7-16
6-18
4-11
19-25
3.0
138-153
303-333
130-165
305-350
7-18
7-14
5-9
17-22
Heating -- No Hot Water Generator
Entering
Water Temp
°F
Water Flow
GPM/Ton
NDZ026 thru NDZ064
NDZ072
NDZ026 thru NDZ072
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Superheat
Subcooling
Water Temp
Drop °F
Air Temp Rise
°F DB
30
1.5
78-100
275-325
85-105
325-385
6-11
4-16
2-8
20-29
3.0
78-110
285-325
90-120
335-375
6-11
4-16
3-7
20-32
50
1.5
105-120
305-350
100-130
340-400
5-12
4-16
5-12
24-32
3.0
110-125
305-355
110-125
345-395
9-15
2-14
4-9
20-34
70
1.5
140-155
305-355
130-165
370-430
5-12
2-14
8-12
24-39
3.0
145-160
330-360
140-160
375-425
7-17
7-15
4-9
24-39
Second Stage Operation
Cooling -- No Hot Water Generator
Entering
Water Temp
°F
Water Flow
GPM/Ton
NDZ026 thru NDZ064
NDZ072
NDZ026 thru NDZ072
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Superheat
Subcooling
Water Temp
Rise °F
Air Temp
Drop °F DB
50
1.5
120-140
200-245
105-150
210-270
7-17
6-14
7-16
19-26
3.0
115-140
195-290
110-130
215-260
7-15
4-11
8-12
20-24
70
1.5
121-136
265-310
105-150
280-350
9-15
6-18
7-15
19-25
3.0
123-139
265-310
110-140
285-320
10-16
8-16
8-12
18-24
90
1.5
122-140
310-360
115-140
325-385
8-14
6-18
10-16
18-24
3.0
123-139
310-350
120-135
330-355
8-14
7-15
8-12
17-23
Heating -- No Hot Water Generator
Entering
Water Temp
°F
Water Flow
GPM/Ton
NDZ026 thru NDZ064
NDZ072
NDZ026 thru NDZ072
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Superheat
Subcooling
Water Temp
Drop °F
Air Temp Rise
°F DB
30
1.5
72-89
295-350
70-100
320-370
7-18
10-20
4-13
18-24
3.0
73-87
305-330
75-90
315-365
7-18
10-20
4-16
18-27
50
1.5
100-120
320-365
95-130
375-430
6-14
6-18
4-10
23-34
3.0
105-120
355-365
100-125
370-420
6-14
6-18
4-9
20-37
70
1.5
142-158
360-380
130-165
400-470
6-12
4-15
6-15
28-38
3.0
138-152
365-390
135-160
405-465
7-14
4-15
6-12
24-42
NOTES:
Cooling performance based on entering air temperatures of 80°F DB, 67°F WB.
Heating performance based on entering air temperatures of 70°DB.
5/29/08
