Step 6 — Adjust Factory-Installed Options
MOISTUREMISER DEHUMIDIFICATION PACKAGE —
MoistureMiser package operation can be controlled by field
installation of a Carrier-approved humidistat (Fig. 10). To
install the humidistat:
1. Route humidistat cable through hole provided in unit cor-
ner post.
2. Feed wires through the raceway built into the corner post
to the 24-v barrier located on the left side of the control
box. See Fig. 9. The raceway provides the UL-required
clearance between high- and low-voltage wiring.
3. Use a wire nut to connect humidistat cable into low-
voltage wiring as shown in Fig. 11.
APOLLO CONTROL — The optional Apollo control is used
to actively monitor all modes of operation as well as indoor
(evaporator) fan status, filter status, and indoor-air quality.
The Apollo control is designed to work with Carrier TEMP
and VVT
t
systems.
The thermostat must be wired to the Apollo control before
starting the unit. Refer to the Apollo control installation in-
structions for information on installing the thermostat. See
Fig. 12 for Apollo location.
DISCONNECT SWITCH — The optional disconnect switch
is non-fused. The switch has the capability of being locked
in place for safety purposes.
OPTIONAL DURABLADE ECONOMIZER — The op-
tional economizer hood assembly is packaged and shipped
in the filter section. Damper blades and control boards are
installed at the factory and the economizer is shipped in the
vertical discharge position.
NOTE: Horizontal discharge block-off plate is shipped with
the air hood package. If unit is to be used for vertical dis-
charge application, discard this plate.
Assembly
1. Determine if ventilation air is required in building. If
so, determine the minimum amount to be supplied by
each unit and record quantity of ventilation air needed
for use in Step 8.
2. Remove filter access panel by raising panel and swing-
ing panel outward. Panel is now disengaged from track
and can be removed. No tools are required to remove
filter access panel. Remove outdoor-air opening panel.
Save panels and screws. See Fig. 13. Slide economizer
out of unit, and remove optional outdoor-air damper
hood package from filter section (hood package is lo-
cated behind economizer).
3. Assemble outdoor-air hood top and side plates as shown
in Fig. 14. Install seal strips on hoop top and sides. Put
aside screen retainer and retainer screw for later assem-
bly. Do not attach hood to unit at this time.
4. On 012 and 014 units, install vertical discharge block-
off plate over duct openings. See Fig. 15.
5. Slide economizer into unit and secure with screws. See
Fig. 16.
NOTE: Be sure to engage rear economizer flange under
tabs in vertical return-air opening.
Table 3 — Heat Anticipator Settings
UNIT
UNIT VOLTAGE
208/230
460
575
Heater
kW*
Configuration
Heater
kW
Configuration
Heater
kW
Configuration
1-Stage
2-Stage
1-Stage
2-Stage
1-Stage
2-Stage
Stage 1
Stage 2
Stage 1
Stage 2
Stage 1
Stage 2
50HJ
10.4, 16.0
0.3
NA
NA
13.9, 16.5
27.8, 33.0
0.3
NA
NA
17.0, 34.0
0.3
NA
NA
32.0, 24.0
0.6
0.3
0.3
42.4, 50.0
0.9
0.6
0.3
41.7, 50.0
0.6
0.3
0.3
51.0
0.6
0.3
0.3
*kW is based on 240 v.
Fig. 9 — Field Control Wiring Raceway
MOISTUREMISER
% RELATIVE HUMIDITY
Fig. 10 — Accessory Field-Installed Humidistat
11
Summary of Contents for 50HJ008-014
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