Daikin DAR1204 설치 지침 매뉴얼 - 페이지 6

{카테고리_이름} Daikin DAR1204에 대한 설치 지침 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Daikin DAR1204 12 페이지. Commercial air handlers

페이지 인쇄
Daikin DAR1204 설치 지침 매뉴얼
Voltage Balance The supply voltage shall be unbalance (phase
to phase) within 2%. To calculate the percentage of voltage
unbalance use the following formula:
Percentage
Max Voltage Deviation From Average
Voltage Unbalance = 100 x
Example
.
L1 – L2 = 220 V
L2 – L3 = 216 V
L1 – L3 = 213 V
Avg. Voltage
Max. Deviation from Avg. = 220 – 216 = 4
% Voltage Unbalance
= 100 x (4 / 216)
= 400 / 216
= 1.8%
Determine Wire Size The selection of the appropriate supply
wire size is important to the operation of the equipment.
When selecting the wire size the following are important
elements of the decision:
•
The wire size is adequately sized to carry the Minimum
Circuit Ampacity (MCA). Refer to the NEC (USA) or CSA
(Canada) for wire sizing. The unit MCA for the airhandler
and the optional electric heat kit can be found on the
equipment S&R plate and the following table.
AIRHANDLER
VOLTAGE
208-230
DAR0904
460
208-230
DAR1204
460

Wire Sizing

Wire size is important to the operation of your equipment. Use
the following check list when selecting the appropriate wire size
for your unit.
•
Wire size must carry the Minimum Circuit Ampacity (MCA).
Average Voltage
=
(220+216+213) / 3
=
649 / 3
=
216
HEAT KIT
MCA
None
6.5
AHKD15-3
49.8
AHKD20-3
64.2
AHKD30-3
93.1
None
3.3
AHKD15-4
24.9
AHKD20-4
32.1
AHKD30-4
46.6
None
9.8
AHKD15-3
53.1
AHKD20-3
67.5
AHKD30-3
96.4
None
4.9
AHKD15-4
26.5
AHKD20-4
33.7
AHKD30-4
48.2
•
Refer to the NEC (USA) or CSA (Canada) for wire sizing. The
unit MCA for the air handler and the optional electric heat
kit can be found on the unit Series and Rating Plate.
•
Wire size allows for no more than a 2% voltage drop from
the building breaker/fuse panel to the unit.
Refer to the latest edition of the National Electric Code or
in Canada the Canadian Electric Code when determining
the correct wire size. The following table shows the cur-
rent carrying capabilities for copper conductors rated at
o
75
C with a 2% voltage drop. Use this table determine the
voltage drop per foot of various conductors.
MAXIMUM ALLOWABLE LENGTH IN FEET
TO LIMIT VOLTAGE DROP TO 2%
Minimum Circuit Ampacity (MCA)
Wire Size
10
15
(AWG)
14
75
50
12
118
79
10
188
125
8
301
201
6
471
314
Based on NEC 1996

Maximum Overcurrent Protection (MOP)

Every installation must include an NEC (USA) or CEC (Canada) ap-
proved overcurrent protection device. Also, check with local or
state codes for any special regional requirements.
Protection can be in the form of fusing or HACR style circuit break-
ers. The Series and Rating Plate can be used as a guide for select-
ing the MAXIMUM overcurrent device or reference the following
table.
NOTE: Fuses or circuit breakers are to be sized larger than the
equipment MCA but not to exceed the MOP.
AIRHANDLER
DAR0904
DAR1204
6
20
25
30
35
40
37
NR
NR
NR
NR
59
47
NR
NR
NR
95
75
63
54
NR
150
120
100
86
75
235
188
157
134
118
HEAT KIT
MOP
None
15
AHKD15-3
50
AHKD20-3
70
AHKD30-3
100
None
15
AHKD15-4
25
AHKD20-4
35
AHKD30-4
50
None
15
AHKD15-3
60
AHKD20-3
70
AHKD30-3
100
None
15
AHKD15-4
30
AHKD20-4
35
AHKD30-4
50
45
NR
NR
NR
68
110