Operating parameters, Operating limits, Versatec base series installation manual – WaterFurnace Versatec Base User Manual
Page 43
43
VERSATEC BASE SERIES INSTALLATION MANUAL
Operating Parameters
NOTES: Cooling performance based on entering air temperatures of 80°F DB, 67°F WB.
Heating performance based on entering air temperature of 70°F DB.
Operating Limits
Operating Limits
Cooling
Heating
(°F)
(°C)
(°F)
(°C)
Air Limits
Min. Ambient Air
45
7.2
45
7.2
Rated Ambient Air
80
26.7
70
21.1
Max. Ambient Air
100
37.8
85
29.4
Min. Entering Air
50
10.0
40
4.4
Rated Entering Air db/wb
80.6/66.2
27/19
68
20.0
Max. Entering Air db/wb
110/83
43/28.3
80
26.7
Water Limits
Min. Entering Water
30
-1.1
20
-6.7
Normal Entering Water
50-110
10-43.3
30-70
-1.1
Max. Entering Water
120
48.9
90
32.2
NOTE: Minimum/maximum limits are only for start-up conditions, and
are meant for bringing the space up to occupancy temperature. Units
are not designed to operate at the minimum/maximum conditions on
a regular basis. The operating limits are dependent 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.
Entering Water
Temp °F
Water Flow
gpm/ton
Cooling
Suction
Pressure psig
Discharge
Pressure psig
Superheat
Subcooling
Water Temp
Rise °F
Air Temp Drop
°F DB
30
1.5
100-115
170-190
17 - 26
10 - 14
18 - 22
18 - 22
3.0
95-110
150-170
20 - 29
7 - 11
8 - 10
18 - 22
50
1.5
133 - 148
205 - 225
17 - 26
10 - 14
18 - 22
18 - 22
3.0
129 - 144
185 - 205
20 - 29
7 - 11
8 - 10
18 - 22
70
1.5
139 - 154
280 - 300
8 - 11
8 -12
18 - 22
18 - 22
3.0
137 - 152
250 - 270
9 - 12
7 - 11
8 - 10
18 - 22
90
1.5
143 - 158
360 - 380
8 - 11
9 - 13
18 - 22
16 - 20
3.0
141 - 156
330 - 350
9 - 12
8 - 12
8 - 10
16 - 20
110
2.3
143 - 158
360 - 380
8 - 11
9 - 13
18 - 22
16 - 20
3.0
141 - 156
440-460
9 - 12
8 - 12
8 - 10
16 - 20
Entering Water
Temp °F
Water Flow
gpm/ton
Heating
Suction
Pressure psig
Discharge
Pressure psig
Superheat
Subcooling
Water Temp
Drop °F
Air Temp Rise
°F DB
30
1.5
73 - 79
279 - 304
7 - 13
2 - 6
7 -10
18 - 24
3.0
79 - 85
285 - 310
8 - 14
2 - 6
3 - 6
20 - 26
50
1.5
103 - 109
308 - 333
8 - 12
4 - 8
8 - 11
20 - 26
3.0
110 - 116
315 - 340
9 - 13
4 - 8
4 - 7
22 - 28
70
1.5
140 - 146
330 - 365
10 - 14
7 - 11
11 - 14
26 - 32
3.0
146 - 153
340 - 375
10 - 14
7 - 11
7 - 10
28 - 34
90
1.5
170-177
425-460
14-18
12-16
8-11
42-50
3.0
174-181
435-470
14-18
12-16
8-11
42-50
110
2.3
3.0
5/1/11