Daikin DP5HH2441 Series, Руководство по установке

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In general 400 CFM per ton of cooling capacity is a rule
of thumb. Some applications depending on the sensible
and latent capacity requirements may need only 350
CFM or up to 425 CFM per ton. Check condition space
load requirements (from load calculations) and equipment
expanded ratings data to match CFM and capacity.
After unit is set and ducted, verify ESP with a 1” inclined
manometer with pitot tubes or a Magnahelic gauge
and confirm CFM to blower curves in the specification
sheets. All units have multiple speed blower motors. If
factory selected speed is not utilized, the speed tap can
be changed. Never run CFM below 350 CFM per ton,
evaporator freezing or poor unit performance is possible.
ADJUSTING SPEED TAP FOR INDOOR
BLOWER MOTOR
EEM Motor
The blower motor speed for the EEM motor is controlled by
three 24V low voltage leads: green, yellow, and white. The
green lead sets the speed for fan-only mode. The yellow
lead sets the speed for cooling and heat pump heating
mode (if applicable). The white lead sets the speed for
electric heat mode (emergency heat and second stage
heat, if applicable).
The leads are factory connected as follows: Green to T1,
Yellow to T2, and White to T3. T1 is the low speed setting
and is dedicated to fan-only mode. T2 is medium speed
cooling and T3 is medium speed heating. T4 is high speed
cooling and T5 is high speed heating. To adjust the blower
speed, move the yellow and/or white wires to T4 and T5.
NOTE: If more than one lead is energized at the
same time, the motor will use the higher speed
setting.
NOTE: GPC15 and GPH16 units are rated for a
maximum E.S.P. of 0.8 except when using a 20kw
electric heater. (The maximum static for 20 kW
electric heat is 0.5 E.S.P.) When these units are
installed in the 0.5 - 0.8 E.S.P. range, the white lead
(electric heat) must be moved to T5 for proper
operation of the electric heaters.
See CFM vs ESP tables in this manual.
Refrigerant Charge Check
(Units with Fixed Orifice Devices)
After completing airflow measurements and adjustments
the unit’s refrigerant charge must be checked. All package
units with fixed orifice devices are charged using the
super heat method at the compressor suction line. After
superheat is adjusted it is recommended to check unit
sub-cooling at the condenser coil liquid line out. For charge
adjustments, see superheat and subcooling charts shown
for each model.
SUPERHEAT CAN BE DETERMINED AS FOLLOWS:
1. Read suction pressure. Determine Saturated
Suction Temperature from tables or pressure gauge
saturated temperature scale (R-410A).
2. Read suction line temperature.
3. Use the following formula:
SUPERHEAT = SUCTION LINE TEMP - SAT.
SUCTION TEMP.
SUCTION
PRESSURE
SATURATED
SUCTION
TEMPERATURE
ºF
LIQUID
PRESSURE
SATURATED
LIQUID
TEMPERATURE
ºF
PSIG R-410A PSIG R-410A
50 1 200 70
52 3 210 73
54 4 220 76
56 6 225 78
58 7 235 80
60 8 245 83
62 10 255 85
64 11 265 88
66 13 275 90
68 14 285 92
70 15 295 95
72 16 305 97
74 17 325 101
76 19 355 108
78 20 375 112
80 21 405 118
85 24 415 119
90 26 425 121
95 29 435 123
100 31 445 125
110 36 475 130
120 41 500 134
130 45 525 138
140 49 550 142
150 53 575 145
160 56 600 149
170 60 625 152
SATURATED
SUCTION PRESSURE
TEMPERATURE CHART
SATURATED
LIQUID PRESSURE
TEMPERATURE CHART