Table 6A — Hot Water Pressure Drop
50BVC,E,J,K,Q Units
FLOW RATE | SIZE 020 | SIZE 024 | SIZE 028 | SIZE 034 |
(gpm) |
| Pressure | Drop (ft wg) |
|
10 | 0.7 | 0.7 | 0.7 | — |
15 | 1.5 | 1.5 | 1.5 | — |
20 | 2.6 | 2.6 | 2.6 | — |
25 | 4.0 | 4.0 | 4.0 | — |
30 | 5.8 | 5.8 | 5.8 | 0.1 |
35 | 7.8 | 7.8 | 7.8 | 0.1 |
40 | 10.2 | 10.2 | 10.2 | 0.1 |
45 | 12.9 | 12.9 | 12.9 | 0.2 |
50 | 15.8 | 15.8 | 15.8 | 0.2 |
55 | — | — | — | 0.3 |
60 | — | — | — | 0.3 |
65 | — | — | — | 0.4 |
LEGEND
GPM — Flow Rate
PD — Pressure Drop (ft wg)
Table 6B — Hot Water Pressure Drop
50BVT,U,V,W,X Units
FLOW RATE | SIZE 034 | SIZE 044 | SIZE 054 | SIZE 064 |
(gpm) |
| Pressure | Drop (ft wg) |
|
45 | 2.4 | — | — | — |
50 | 3.0 | — | — | — |
55 | 3.6 | — | — | — |
60 | 4.3 | — | — | — |
65 | 5.0 | — | — | — |
70 | 5.7 | — | — | — |
75 | 6.6 | — | — | — |
80 | 7.4 | — | — | — |
85 | 8.4 | — | — | — |
90 | 9.3 | 2.5 | 2.5 | 2.5 |
100 | — | 3.1 | 3.1 | 3.1 |
110 | — | 3.7 | 3.7 | 3.7 |
120 | — | 4.4 | 4.4 | 4.4 |
130 | — | 5.1 | 5.1 | 5.1 |
140 | — | 5.9 | 5.9 | 5.9 |
150 | — | 6.7 | 6.7 | 6.7 |
160 | — | 7.6 | 7.6 | 7.6 |
170 | — | 8.6 | 8.6 | 8.6 |
180 | — | 9.6 | 9.6 | 9.6 |
LEGEND
GPM — Flow Rate
PD — Pressure Drop (ft wg)
Pipe sizes should be selected based on the head pressure available from the pump. Water velocity should not exceed 8 fps. Design the piping system for approximately 3 ft of loss per 100 equivalent ft of pipe. The piping system should allow for expansion and minimize vibration between the unit and piping system.
WATER ECONOMIZER (Optional) — The optional waterside economizer
The waterside economizer can also be ordered without
Table 7A — Economizer Pressure Drop Curve
(ft wg), 50BVC,E,J,K,Q Units
FLOW RATE | SIZE 020 | SIZE 024 | SIZE 028 | SIZE 034 |
(gpm) |
| Pressure | Drop (ft wg) |
|
35 | 8.9 | — | — | — |
40 | 11.5 | 11.0 | — | — |
45 | 14.4 | 13.8 | — | — |
50 | 17.6 | 16.9 | 16.9 | — |
55 | 21.1 | 20.4 | 20.4 | — |
60 | 24.9 | 24.1 | 24.1 | 3.5 |
65 | 29.0 | 28.1 | 28.2 | 4.1 |
70 | 34.4 | 32.5 | 32.5 | 4.7 |
75 | — | 37.1 | 37.2 | 5.4 |
80 | — | 42.1 | 42.1 | 6.1 |
85 | — | — | 47.4 | 6.9 |
90 | — | — | 52.9 | 7.7 |
95 | — | — | 58.7 | 8.5 |
100 | — | — | 64.9 | 9.4 |
105 | — | — | — | 10.3 |
110 | — | — | — | 11.3 |
115 | — | — | — | 12.3 |
120 | — | — | — | 13.4 |
LEGEND
GPM — Flow Rate
PD — Pressure Drop (ft wg)
BALL VALVE |
|
|
WATERSIDE
ECONOMIZER
N.C.COIL
N.O.
AQUASTAT
MBV
N.O.
FLUID IN
“BULB STRAPPED TO FLUID” IN LINE (FIELD INSTALLED)
FLUID TO REFRIGERANT
HEAT EXCHANGER
POSITIVE
(FIELD INSTALLED)
Fig. 21 — Optional Water Economizer
23