22
Single Point Boxes and Supplementary Fuses
When the unit MOCP device value exceeds 60-A, unit-mount-
ed supplementary fuses are required for each heater circuit.
These fuses are included in accessory single point boxes, with
power distribution and fuse blocks. The single point box will
be installed directly under the unit control box, just to the left
of the partition separating the indoor section (with electric
heaters) from the outdoor section. The single point box has a
hinged access cover. See Fig. 39. The single point box also in-
cludes a set of power taps and pigtails to complete the wiring
between the single point box and the unit’s main control box
terminals. Refer to the accessory heater and single point box
installation instructions for details on tap connections on the
field-installed electric heat accessory.
All fuses on 549J units are 60-A. (Note that all heaters are
qualified for use with a 60-A fuse, regardless of actual heater
ampacity, so only 60-A fuses are necessary.)
Single Point Boxes without Fuses
Refer to accessory heater and single point box installation in-
structions for details on tap connections.
Fig. 39 — Typical Single Point Installation
Low Voltage Control Connections
Run the low-voltage control leads from the heater module(s)
— VIO and BRN (two of each if two modules are installed;
identify for Module #1) — to the 4-pole terminal board TB4
located on the heater bulkhead to the left of Heater #1. Connect
the VIO leads from Heater #1 and Heater #2 to terminal
TB4-1. Connect the BRN leads to terminal TB4-3. See Fig. 40.
Fig. 40 — Accessory Electric Heater Control Connections
CONTROL AND POWER WIRING DIAGRAMS
Figures 41-47 are typical control and power wiring diagrams.
ALLIED PA
MODEL NO.
ERIAL NO.
CORP.
11
13
21
23
OD
22.2
3
1
23
ISTED AIR
NDITIONING
UIP ACCESS
346N
.
P / N
2-
5610-4
REV
1
1
1
3
2
1
2
3
CONTROL
BOX
BUSHING
SINGLE
POINT BOX
MOUNTING
SCREWS
FOAM
BUSHING
DRIP BOOT
BRACKET
MOUNTING
SCREWS
HEATER
RELAYS
POWER
WIRES
HEATER
MOUNTING
SCREWS
DEFRO
S
T
BOARD
ORN
BRN
Field
Connection
s
E-HEAT
P
3
-
3
3
1
ORN
BRN
VIO
BRN BRN
VIO
TB4
VIO
HR2
HR1
BRN
VIO
BRN
Elec Htr
HR1: On He
a
ter 1 in Po
s
ition #1
HR2: On He
a
ter 2 in Po
s
ition #2 (if in
s
t
a
lled)
Содержание Preferred 549J 04
Страница 4: ...4 Fig 2 549J 04 06 Units Built On and After 4 15 2019...
Страница 5: ...5 Fig 3 549J 04 06 Units Built Prior to 4 15 2019...
Страница 6: ...6 Fig 4 549J 04 06 Corner Weights and Clearances...
Страница 7: ...7 Fig 5 549J 04 06 Base Rail Details...
Страница 8: ...8 Fig 6 549J 04 06 Thru the Base Charts...
Страница 23: ...23 Fig 41 Electro Mechanical Control Wiring 208 230v 460v...
Страница 24: ...24 Fig 42 Electro Mechanical Control Wiring 575v...
Страница 25: ...25 Fig 43 Electro Mechanical Power Wiring 208 230 1 60...
Страница 26: ...26 Fig 44 Electro Mechanical Power Wiring 208 230 3 60...
Страница 27: ...27 Fig 45 Electro Mechanical Power Wiring 460 3 60...
Страница 28: ...28 Fig 46 Electro Mechanical Power Wiring 575 3 60...
Страница 29: ...29 Fig 47 RTU Open System Control Wiring...
