Step 9 - Install All Accessories; Step 10 - Defrost Cycle - Carrier 50HJQ016 Installation, Start-Up And Service Instructions Manual

Step 9 — Install All Accessories —
factory-installed options have been adjusted, install all field-
installed accessories. Refer to the accessory installation instruc-
tions included with each accessory.
MOTORMASTER® I CONTROL INSTALLATION
Install Field-Fabricated Wind Baffles — Wind baffles must
be field-fabricated for all units to ensure proper cooling cycle
operation at low ambient temperatures. See Fig. 26 for baffle
details. Use 20-gage, galvanized sheet metal, or similar
corrosion-resistant metal for baffles. Use field-supplied screws
to attach baffles to unit. Screws should be
5
/ -in. long. Drill required screw holes for mounting baffles.
8
To avoid damage to the refrigerant coils and electrical com-
ponents, use recommended screw sizes only. Use care
when drilling holes.
Install Motormaster I Controls — Only one Motormaster I
control is required per unit. The Motormaster I control must be
used in conjunction with the Accessory 0° F Low Ambient Kit
(purchased separately). The Motormaster I device controls out-
door fan no. 1 while outdoor fans no. 2 and 3 are sequenced off
by the Accessory 0° F Low Ambient Kit.
Outdoor Air Enthalpy
CROUTENT001A00
Tan
OAT Violet
COM W hite
OAH Red
+15V
Tan
RAT
Violet
COM
W hite
RAH
Red
+15V
CO (+)
2
CO
2
COM
DAT
COM
REM
POT
COM
LED
COM
After all the
1
/ -in. diameter and
4
T
Violet
O
C
U
O
T T
M PW
C
O
M PW
Remote
Minimum Position
1k ohm Potentiometer
20 mA LED
Remote
LED
Field-supplied W iring
Fig. 25 — Typical EconoMi$er Sensor Wiring
Accessory 0° F Low Ambient Kit — Install the Accessory 0° F
Low Ambient Kit per instruction supplied with accessory.
Sensor Assembly — Install the sensor assembly in the location
shown in Fig. 27.
Motor Mount — To ensure proper fan height, replace the exist-
ing motor mount with the new motor mount provided with
accessory.
Transformer (460 and 575-v Units Only) — On 460 and
575-volt units a transformer is required. The transformer is
provided with the accessory and must be field-installed.
Motormaster I Control — Recommended mounting location is
on the inside of the panel to the left of the control box. The
control should be mounted on the inside of the panel, verti-
cally, with leads protruding from bottom of extrusion.
Step 10 — Defrost Cycle —
tory set at 30 minutes. The timer may be field-adjusted to 50 or
90 minutes by moving the wire from the 30 minute contact to
the 50 to 90 minute contact. At the end of the time period, the
defrost cycle will begin. See Fig. 28.
Unoccupied Control
(Part number on the control
must be AD-DME1701-1
or AD-DME1711-1.)
Unoccupied
Contact
470 ohm
5 watt
Resistor
24 VAC must be present
on BI for the system to be
unoccupied.
Return Air Enthalpy
CRRETENT001A00
Violet
T
O CO2 Sensors:
U
T T
3 3ZCSENCO
W iring Included
14
The defrost timer is fac-
2
2 to 10 VDC at
0 to 2000 ppm
Line
Voltage