York International ZK Series, Руководство по установке

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5121817-TIM-A-0515
50 Johnson Controls Unitary Products
Adjustment Of Temperature Rise
The temperature rise (or temperature difference between the
return air and the heated air from the furnace) must lie within
the range shown on the rating plate and the data in the Gas
Heat Application Table 10.
After the temperature rise has been determined, the cfm can be
calculated as follows:
After about 20 minutes of operation, determine the furnace
temperature rise. Take readings of both the return air and the
heated air in the ducts (about six feet from the furnace) where
they will not be affected by radiant heat. Increase the blower
cfm to decrease the temperature rise; decrease the blower cfm
to increase the rise. Refer to the In Door Blower Specification
Table 17.
Charging The Unit
Charge the units to the following tables.
Table 26: ZKT03 Charging Table
1. By actual measurement, it takes 38 seconds for the hand on
the 1-cubic foot dial to make a revolution with a 100,000 Btuh
furnace running. Using this information, located 38 seconds
in the first column in the table above. Read across to the
column headed “1 Cubic Foot”, where you will see that 95
cubic feet of gas per hour are consumed by the furnace at
that rate. Multiply 95 X 1050 (the Btu rating of the gas
obtained from the local gas company). The result is 99,750
Btuh, which is close to the 100,000 Btuh rating of the furnace.
CFM
Btuh Input x 0.8
=
108 . .
x F Temp Rise
o
Air Flow
Indoor Db/Wb
Outdoor
DB
Suction
Pressure
Suction
Temp.
Discharge
Pressure
Pressure
Liquid
Temp. Delta T
Db
Entering
Evap Db Leaving
Evap Db
Compressor
Amps
300 Cfm/Ton
80/62
75 123 49 259 78 -29 80 51 6.0
85 126 50 299 88 -28 80 52 6.3
95 128 52 344 99 -26 80 54 7.1
300 Cfm/Ton
80/67
75 134 56 262 79 -24 80 56 5.6
85 136 56 303 89 -23 80 57 6.3
95 140 58 348 99 -22 80 58 7.1
300 Cfm/Ton
80/72
75 146 61 266 79 -20 80 60 5.7
85 149 62 307 89 -18 80 62 6.3
95 152 63 352 100 -17 80 63 7.1
300 Cfm/Ton
75/63
75 125 50 260 78 -23 75 52 5.6
85 128 51 300 89 -22 75 53 6.3
95 130 52 344 99 -21 75 54 7.1
400 Cfm/Ton
80/62
75 129 52 261 79 -26 80 54 5.6
85 132 52 301 89 -25 80 55 6.3
95 135 54 346 99 -24 80 56 7.1
400 Cfm/Ton
80/67
75 140 58 264 79 -22 80 58 5.6
85 143 59 305 89 -21 80 59 6.3
95 146 59 350 99 -20 80 60 7.1
400 Cfm/Ton
80/72
75 152 63 268 79 -17 80 63 5.7
85 155 64 309 90 -16 80 64 6.3
95 157 65 353 100 -15 80 65 7.1
400 Cfm/Ton
75/63
75 131 53 261 79 -20 75 55 5.6
85 133 54 302 89 -19 75 56 6.3
95 136 55 347 99 -18 75 57 7.1