19
1. Check refrigerant charge by measuring liquid subcooling.
Subcooling should be approximately 10°F to 13°F. If a
sight glass has been installed on the liquid line at the fan
coil unit check for the presence of flashing.
2. If the subcooling is below 10°F, add refrigerant gas to
the suction line service port. Watch pressure gauge and
thermometer for correct subcooling. It should be
approximately 10°F to 13°F.
3. If subcooling is too high, slowly bleed refrigerant from
suction line service port into an appropriate refrigerant
recovery device. Watch pressure gauge and
thermometer for correct subcooling (10˚F to 13˚F).
Releasing refrigerant gas into the
atmosphere is a criminal offense.
FACTORS AFFECTING THE BALANCE OF
THE SYSTEM
A. Room Terminators (Outlets): Based on the
equipment selected, determine the recommended
number of fully open outlets from Figure 3.1.
FIGURE 3.1
NOMINAL
TONNAGE
2
2-1/2
3
3-1/2
4
5
MODEL
ESP-2430G
ESP-2430G
ESP-3642G
ESP-3642G
ESP-4860G
ESP-4860G
A
12
15
18
21
26
30
MINIMUM RECOMMENDED
NUMBER OF FULLY OPEN OUTLETS
1. The minimum or recommended number of outlets
means fully open outlets. Any outlet having an orifice
would be only a percentage of an outlet.
2. For systems with average supply tubing lengths of 15
feet or less, use column A. For systems with supply
tubing lengths greater than 15 feet, use column B.
NOTICE: The number of outlets and average length of
the supply tubing has a significant effect on the over-
all system performance. It is highly recommended
that the adjustment factors outlined in the SpacePak
Application Manual are accounted for prior to any
installation.
B. Orifice Combinations: Should orifices be required to
balance the system (installed at plenum take-off),
refer to the combinations listed in Figure 3.2.
FIGURE 3.2
*For a room with more than two (2) terminals, combinations of
the above may be used to achieve the desired fractional
number.
C.Supply Tubing Length: An outlet with a supply tubing
length of 15 feet is considered one, fully opened outlet. For
other lengths refer to Figure 3.3 for adjustment factors.
FIGURE 3.3
2" SUPPLY TUBING LENGTH ADJUSTMENT FACTOR CHART
RUN
6'
8'
10'
12'
15'
20'
25'
30'
FACTOR
.85
.88
.90
.94
1.0
1.1
1.25
1.50
B
14
18
21
25
28
35
DESIRED NUMBER
OF TERMINALS*
.5
.65
.85
1.00
1.15
1.30
1.50
1.65
1.70
1.80
1.85
1.95
2.00
TERMINAL - ORIFICE
COMBINATION
(1) .5
(1) .35
(1) .15
(1)
(1) .5 + (1) .35
(2) .35
(1) .35 + (1) .15 or (1) + (1) .5 or (3) .5
(1) + (1) .35 or (2) .5 + (1) .35
(2) .15
(2) .35 + (1) .5
(1) + (1) .15
(3) .35
(2)
Summary of Contents for ESP-G SYSTEM
Page 10: ...10 FIGURE 2 9 FIGURE 2 8...
Page 13: ...FIGURE 2 13 WIRING DIAGRAM 13...