York DM 300 - Manual (Page 9)

262259-YTG-E-1008
Johnson Controls Unitary Products 9
NOTE: All gas units are two-stage heating.
First stage is 50% of total.
S.S.E. = Steady State Efficiency (80%) - output divided by input.
TABLE 1: SOUND POWER RATING
1
UNIT
SIZE
CFM
ESP BLOWER
SOUND POWER (db 10
-12
Watts)
Octave Band Centerline Frequency (Hz)
SWL
dB(A)
dB(A)
@
10Ft.
2 IWG RPM BHP 63 125 250 500 1,000 2,000 4,000 8,000
180 6,000 1.00 1,080 4.60 99 99 89 82 84 77 72 67 89 56
240 8,000 1.00 1,120 6.65 102 102 92 85 87 80 75 70 92 59
300 10,000 1.30 1160 12.5 108 108 98 91 93 86 81 76 98 65
1. These values have been accessed using a model of sound propagation from a point source into the hemispheric\free field. The
dBA values provided are to be used for reference only. Calculation of dBA values cover matters of system design and the fan
manufacture has no way of knowing the details of each system. This constitutes and expectation to any specification or guarantee
requiring a dBA value or sound data in any other form than sound power level ratings.
2. At a distance of 10 feet from the blower.
TABLE 2: CAPACITY RATINGS - (ARI 360)
1
1. Certified in accordance with the Unitary Large Equip-
ment certification program which is based on ARI Stan-
dard 340/360.
MODEL MBH EER 2
2. EER = Energy Efficiency Ratio at full load - the cooling
capacity in Btu’s per hour (Btuh) divided by the power
input in watts, expressed in Btuh per watt (Btuh/watt).
IPLV 3
3. IPLV = Integrated Part Load Value.
COOLING ONLY
DM180C00 176 8.7 9.2
DM240C00 234 8.6 8.05
DM300C00 272 8.5 9.2
COOLING WITH GAS HEAT
DM180N/S 176 8.5 9.0
DM240N/S 232 8.5 8.05
DM300N/S 272 8.5 9.0
COOLING WITH ELECTRIC HEAT
DM180E18 176 8.7 9.2
DM180E36 176 8.6 9.1
DM180E54 174 8.5 8.7
DM180E72 174 8.5 8.7
DM240E18 234 8.5 8.05
DM240E36 234 8.5 8.05
DM240E54 232 8.5 8.05
DM240E72 232 8.5 8.05
DM300E18 272 8.5 9.1
DM300E36 272 8.5 9.1
DM300E54 270 8.5 9.0
DM300E72 270 8.5 9.0
TABLE 3: GAS HEAT RATIINGS
MODEL MBH INPUT MBH OUTPUT
DM180N/S24 300 240
DM180N/S32 400 320
DM240N/S24 300 240
DM240N/S32 400 320
DM300N/S24 300 240
DM300N/S32 400 320
For units with VFD and electric or gas heat, the speed of
the indoor blower motor continues to be controlled by
duct static pressure via the VAV control board.
If there are VAV boxes present in the duct system, the
boxes must be driven to the full-open position using a
customer-supplied power source to assure adequate
airflow across electric heating elements or gas heat
exchanger tubes.