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Table 6 — Minimum Fluid Volume In Circulation
LEGEND
Table 7 — Maximum Loop Volume Limits
LEGEND
NOTE: Max loop volume is based on typical system of 12 psig and
30 psig of min/max pressures, and 100 F mean temperature. If the
volume in the system is greater than the limits listed, then extra
expansion tank volume must be added to the system.
Pump Modification/Trimming (Units with Factory-Installed
Hydronic Package) — Since the pumps are constant speed,
the only way to obtain greater flow with a given pump/impeller
is to decrease system head. This will allow the pump to “ride”
its curve to the right, resulting in increased flow. If greater flow
is necessary, look at opening the balance valve. Also, verify
that the strainer is clean, and that no unnecessary system resis-
tance is present, such as partially closed isolation valves.
Increasing system resistance by closing the balancing valve
will force the pump to “ride” its curve to the left, resulting in
less flow. Although this does reduce power consumption
slightly, it may not be the desirable method of reducing the
flow, especially if a rather large reduction is needed.
325
250
275
300
7
8
9
10
11 & 12
200
225
r
op (Kpa)
125
150
175
W
ater Pressure D
r
50
75
100
W
0
25
50
5202510150
Liters/second
Fig. 17B — Heat Exchanger Pressure Drop — 30RAP035-060 (SI)
LEGEND
7 — 30RAP035 10 — 30RAP050
8 — 30RAP040 11 — 30RAP055
9 — 30RAP045 12 — 30RAP060
30RAP
UNIT
SIZE
NORMAL AIR
CONDITIONING
APPLICATION
gal/ton (L per kW)
PROCESS COOLING OR
LOW AMBIENT
OPERATION
APPLICATION gal/ton
(L per kW)
Std Unit HGBP Digital Std Unit HGBP Digital
010,015 12 (13.0) N/A 3 (3.3) 12 (13.0) N/A 3 (3.3)
018-030 6 (6.5) 4 (4.3) 3 (3.3) 10 (10.8) 7 (7.6) 3 (3.3)
035-060 3 (3.3) 3 (3.3) 3 (3.3) 6 (6.5) 5 (5.4) 3 (3.3)
HGBP — Hot Gas Bypass
BAD
BAD
GOOD
GOOD
Fig. 18 — Tank Baffling
CONCENTRATION
30RAP010-030 30RAP035-060
GALLGALL
PURE WATER 310 1173 725 2744
10% EG 180 681 425 1609
20% EG 175 662 410 1552
30% EG 155 587 370 1401
40% EG 150 568 350 1325
10% PG 175 662 410 1552
20% PG 150 568 350 1325
30% PG 128 485 300 1136
40% PG 118 447 275 1041
EG — Ethlyene Glycol
PG — Propylene Glycol