16
GEO16-501.4
START-UP PROCEDURE
Table 16.1 - Typical Operating Conditions
Heating - No Desuperheater
Entering Water
Temperature
(°F)
Water Flow
(gpm/ton)
Suction
Pressure
(psig)
Discharge
Pressure
(psig)
Superheat
(°F)
Subcool
(°F)
Water
Temperature
Drop (°F)
Air
Temperature
Rise (°F)
30
1.5
68-76
285-310
8-12
3-9
5-7
15-21
3.0
72-80
290-315
8-12
3-9
3-5
17-23
50
1.5
100-110
315-345
9-13
5-11
7-9
22-28
3.0
104-114
320-350
9-13
5-11
5-7
24-30
70
1.5
134-144
355-395
10-14
6-12
9-11
30-36
3.0
138-148
360-390
10-14
6-12
7-9
32-38
Cooling - No Desuperheater
Entering Water
Temperature
(°F)
Water Flow
(gpm/ton)
Suction
Pressure
(psig)
Discharge
Pressure
(psig)
Superheat
(°F)
Subcool
(°F)
Water
Temperature
Rise (°F)
Air
Temperature
Drop (°F)
50
1.5
122-130
220-235
13-19
10-16
19-23
21-25
3.0
120-128
190-210
13-19
10-16
9-12
21-25
70
1.5
127-136
210-280
11-15
8-14
19-23
20-24
3.0
125-134
250-270
11-15
8-14
9-12
20-24
90
1.5
132-144
360-380
10-14
8-14
18-22
18-22
3.0
130-142
330-350
10-14
8-14
9-12
18-22
Table 16.2 - Operating Limits
NOTE:
Limits are acceptable for start-up conditions only.
Min / max limits are intended for bringing the space up/down
to normal temperatures. Units are not designed to operate
at the min/max conditions on a continual or regular basis.
The operating limits are dependant upon three primary factors:
1) water temperature, 2) return air temperature, and 3) ambient
temperature. When any of the factors are at the minimum or
maximum levels, the other two factors must be at the normal
level for proper and reliable unit operation.
Operating Limits
Cooling, °F
Heating, °F
Min. Ambient
45
45
Rated Ambient
80.6
68
Max Ambient
100
85
Min. Entering Air
50
40
Rated Entering Air, db/wb
80.6/66.2
68/59
Max. Entering Air, db/wb
110/83
80
Min. Entering Water
30
20
Normal Entering Water
50-90
30-60
Max. Entering Water
120
90
