Lennox 10HPB18, Руководство по установке

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Page 15
5 − Compare the subcooling value with those in table 5. If
subcooling is greater than shown, recover some refrig-
erant. If subcooling is less than shown, add some re-
frigerant.
Table
5
Subcooling Values
Model Subcooling Temp.
_
F (
_
C)
10HPB18 5 (2.8)
10HPB24 7 (3.9)
10HPB30 9 (5)
10HPB36 11 (6.1)
10HPB42 7 (3.9)
10HPB48 8 (4.4)
10HPB60 10 (5.6)
Charging Using Normal Operating Pressures
and the Approach Method
Outdoor Temp. > 65
_
F (18
_
C)
The following procedure is intended as a general guide and
is for use on expansion valve systems only. For best results,
indoor temperature should be 70°F (21°C) to 80°F (26°C).
Monitor system pressures while charging.
1 − Record outdoor ambient temperature using a digital
thermometer.
2 − Attach high pressure gauge set and operate unit for
several minutes to allow system pressures to stabilize.
3 − Compare stabilized pressures with those provided in
table 6, Normal Operating Pressures." Minor varia-
tions in these pressures may be expected due to differ-
ences in installations. Significant differences could
mean that the system is not properly charged or that a
problem exists with some component in the system.
Pressures higher than those listed indicate that the
system is overcharged. Pressures lower than those
listed indicate that the system is undercharged. Verify
adjusted charge using the approach method.
Table 6
Normal Operating Pressures
Outdoor
Coil Air
10HPB18 10HPB24 10HPB30 10HPB36 10HPB42 10HPB48 10HPB60
Mode
Coil Air
Entering
Temp.
F ( C)
liq.
+10
psig
vap.
+5
psig
liq.
+10
psig
vap.
+5
psig
liq.
+10
psig
vap.
+5
psig
liq.
+10
psig
vap.
+5
psig
liq.
+10
psig
vap.
+5
psig
liq.
+10
psig
vap.
+5
psig
liq.
+10
psig
vap.
+5
psig
65 (18) 148 71 156 70 165 73 171 68 173 69 163 74 166 71
Cooling
75 (24) 171 74 182 72 204 70 192 70 205 72 196 74 195 73
Cooling
TXV
O l
85 (29) 200 76 210 74 236 71 222 71 252 73 229 75 227 74
TXV
Only
95 (35) 230 78 241 75 268 73 258 73 278 74 261 77 261 76
y
105 (41) 263 81 275 78 302 74 295 74 315 78 295 78 302 78
20 (−7) 166 33 170 28 178 24 194 26 182 28 178 26 190 27
Heating
30 (−1) 177 42 184 36 190 32 208 35 190 36 188 34 204 35
Heating
40 (4) 188 51 194 42 202 39 221 42 202 44 196 42 217 43
50 (10) 200 61 212 56 214 47 236 54 212 54 206 50 234 53