Carrier Weathermaster 48HJD Series Product Data page 75

18. Unit-Mounted, Non-Fused Disconnect Switch:
Shall be factory-installed, internally-mounted,
NEC and UL approved non-fused switch shall
provide unit power shutoff. Shall be accessible
from outside the unit and shall provide power
off lockout capability.
19. Convenience Outlet:
Shall be factory-installed
mounted with easily accessible 115-v female
receptacle. Shall include 15 amp GFI recept-
able with independent fuse protection. Voltage
required to operate convenience outlet shall be
provided by a factory-installed step-down trans-
former. Shall be accessible from outside the
unit.
20. MoistureMiser Dehumidification Package:
The dehumidification package is a factory-
installed option that provides increased dehu-
midification by further subcooling the hot liquid
refrigerant leaving the condenser coil. The
package consists of a subcooling coil located on
the leaving-air side of the evaporator coil. The
location of this coil in the indoor airsteam
greatly enhances the latent capacity of the
48HJ units.
The package shall be equipped with crankcase
heater(s), low pressure switch(es), and thermo-
static expansion valve(s) (TXV). Low pressure
switch(es) prevents evaporator coil freeze up
and TXV(s) assure a positive superheat condi-
tion. If the operation of the subcooling coil is
controlled by a field-installed, wall-mounted
humidistat, the dehumidification circuit will then
operate only when needed. Optional field con-
nections for the humidistat are made in the low
voltage compartment of the unit control box.
21. Humidistat:
Field-installed, wall-mounted humidistat is used
to control activation of the dehumidification
package. The humidistat can be set for humidity
levels between 20% and 80% relative humidity.
22. Hinged Panel Option:
Hinged panel option provide hinged access
panels for the filter, compressor, evaporator
fan, and control box areas. Filter hinged panels
permit tool-less entry for changing filters. Each
hinged panel is permanently attached to the
rooftop unit.
23. Flue Hood Protector Assembly:
Provides protection from the hot sides of the
gas flue hood.
* 24. LP Gas Kit:
Package shall contain all the necessary hard-
ware and instructions to convert a standard nat-
ural gas unit for use with liquid propane.
and internally-
25. NOx Reduction Kit:
Package shall contain all necessary hardware
and instructions to convert a standard natural
gas unit to reduce the nitrous oxide (NOx) emis-
sions to meet the California Air Quality Man-
agement NOx requirement of 40 nanograms/
joule or less on 004-006 sizes.
26. Flue Discharge Deflector:
Package shall contain single-piece deflector and
hardware to exhaust the flue discharge up and
away from unit. The flue discharge deflector
shall allow minimum flue side clearances to
combustibles to be reduced to 18 inches.
27. Energy$Recycler:
The package shall be an outdoor rooftop or
slab mounted, electronically controlled, air-to-
air heat pump unit utilizing a rotary compressor
for cooling and heating duty.
The Energy$Recycler shall recover energy from
building exhaust air and pre-condition ventila-
tion air to allow higher ventilation requirements
and minimizing energy cost.
28. EconoMi$er and Power Exhaust:
Package shall provide control of Internal build-
ing pressure. The system shall exhaust up to
100% of return air.
29. Outdoor Air Enthalpy Sensor:
The outdoor air enthlapy sensor shall be used
with the EconoMi$er device to provide single
enthalpy control. When used in conjunction
with a return air
EconoMi$er device
enthalpy control. The sensor allows the
EconoMi$er controller to determine if outside
air is suitable for free cooling.
30. Return Air Enthalpy Sensor:
The return air enthalpy sensor shall be used
with the EconoMi$er device. When used in con-
junction with an outdoor air enthalpy sensor,
the EconoMi$er device will provide differential
enthalpy control.
31. Return Air Temperature Sensor:
The return air temperature sensor shall be used
with the EconoMi$er device. When used in con-
junction with an outdoor air temperature sen-
sor, the EconoMi$er device will provide
differential temperature control.
32. Indoor Air Quality (CO
a. Shall have the ability to provide demand ven-
tilation indoor air quality (IAQ) control
through the economizer with an IAQ sensor.
b. The IAQ sensor shall be available in duct
mount, wall mount, and wall mount with
LED display. The set point shall have adjust-
ment capability.
enthalpy sensor, the
will provide different
) Sensor:
2
75