Carrier 38QE - Manual (Page 2)

domestic water heating control box emd domestic water
heating tank temperature sensor are supplied to control the
electric domestic water heating tank. The water heating is
accomphshed by pumping cold water from the cold water
inlet pipe at the top of the domestic water tank, through the
38QE refrigerant-to-water heat exchanger, and back into
the bottom of the tank.
The variable speed compressor operation allows the 38QE
system to control its output capacity to match the required
load through a wide range of outdoor temperatures and
operating modes.
Specially designed mating 40QE indoor units provide vari­
able airflow control which is increased and decreased along
with the compressor speed. This feature, along with an elec­
tronic expansion device, provide a level of comfort pre­
viously unavailable for the home. It also enhances system
efficiency and provides much quieter operation them conven-
tioneil systems during most periods of operation.
The 38QE/40QE system has many other designed in com­
fort and efficiency features including:
Carrier/Parker Home-Zone® thermostat and damper
options—to provide separate temperature control in up to
four areas.
Humidity control—add the optional humidistat to activate
special compressor and fan control which improves moisture
removal as needed. Humidistat plus humidifier also controls
moisture addition in the heat mode.
Air cleaning—connections provided for automatic control of
optional electronic air cleaner.
Utility demand limit interface—allows owner participation
in incentive programs offered by utilities for peak load con­
trol, where available.
Unique defrost—the high temperature of the water in the
home’s hot water tank is used as the heat source for the
defrost cycle, rather than cooling the indoor air as with tra­
ditional units. In addition, demand type defrost control pro­
vides defrost when, and only when, it is required.
The 38QE/40QE system is available in capacity sizes shown
in Table 1. Accessories supplied with the system and other
available accessories are shown in Table 2.
APPLICATION LIMITATIONS
The 38QE system software and safety devices Eire designed
to prevent equipment operation under conditions that do
not comply with the application hmitations.
The 38QE product has certEun application hmitations which
are hsted below:
1 . The 38QE compressor section and outdoor section are
to be matched to the specifically designed 40QE indoor
fan coil section. Permitted system configurations are
shown in Table 1.
Table 1—Carrier Approved 38QE Systems
SYSTEM CAPACITY 2 TON 3TON
INDOOR COMPRESSOR SECTION 38QE024300 38QE036300
OUTDOOR FAN-COIL SECTION 38QE924300 38QE936300
INDOOR FAN-COIL SECTION 40QE024300 40QE036300
25 ft maximum vertical rise allowable
2 .
3.
The 38QE can only be used with Carrier/Parker Home-
Zone® thermostats. Monitor thermostat and slave ther­
mostat model requirements are given in Table 2. All
thermostats must be properly configured and pro­
grammed in order to obtain normal system operation.
The 38QE should not be used with systems containing
more than four (4) independently dampered zones. Use
6.
of the bypass controUer accessory is required for aU
zone apphcations.
4. The system wiU not operate in the cool mode at outdoor
temperatures below 45 F, and is not compatible with
tie Carrier Motormaster low-ambient control
; accessory. /
5, §The systern wiU not operate in the heat mode at out­
door ternperatures above 75 F.
The compressor section must be located in a non-
freezing area because of water containing components.
Maximum air temperature surrounding the compressor
section must not exceed 105 F because of cooing
required for electronic controls.
The compressor section is designed to be installed on a
sohd mounting pad such as concrete. Do not install
compressor section in an attic, on a wall, or suspended
from a ceiling.
Refrigerant line lengths are hmited to 50 ft total maxi­
mum, with 25 ft maximum vertical rise between indoor
and outdoor units.
9. For improved domestic water heating, locating the
compressor section within 15 ft of the domestic water
tank is desirable.
7.
8 .
Table 2—Accessory Parts List
ACCESSORIES SUPPLIED WITH COMPRESSOR SECTION
ORDERING NUMBER DESCRIPTION
313204-701 Water Heater Control Box
313288-710 Water Temperature Sensor
Assembly
313243-201 Comp. Section Base Pad
ACCESSORIES REQUIRED OR RECOMMENDED
Zones
ORDERING NUMBER DESCRIPTION Singl Mult
HT2000 Homezone Monitor Stat w/
clock RQ RQ
HZS (Version 2.7 or
higher) Homezone Slave Stat RQ
ZD-06,08,10,12,14,16
RD0810,0814,0818,0824
BCE
Round Dampers 6" thru 16" RQ
Rectangular Damper 8x10
thru 24
Bypass Controller
RQ
RQ
TSR01 Relay Pack-Power Supply RQ
PS02/PS01 Duct Pressure Sensor RQ
PSPOO Static Pressure Plok-up RQ
RDS Remote Duct Sensor OP OP
RRS Remote Room Sensor OP OP
PCA-223 Plenum Cable—22 AWG, 3 )
conduc RC RC
PCA-225 Plenum Cable—22 AWG, 5
conduc RC RC
HL38MG026 Humidistat RC RC
— Humidifier (49BF/FH/WS) RC RC
__ Electronic Air Cleaner (31 MPI RC RC
38TH900011
SX)
Outdoor Support Foot Kit, 4
in.
Outdoor Snow Rack, 18 in.
OP OP
38YH900011 OP OP
38YH900021
(024)
Outdoor Snow Rack, 18 in. OP OP
P504-8163S
(036)
Bi-flow Filter-Drier RQ RQ
HT01AX220 Transformer 40va — RQ
RQ—Required for installations.
RC—Recommended for installations. OP—Optional for installations.
10. System is designed to work with conventional residen­
tial sized electric water heating tanks only. NOTE: The
38QE should be installed with electric water heater
tanks that have two connections leading to the bottom
of the tank, as shown in Fig. 7a (cold water in, drain). If
only one connection to bottom of tank, install a preheat
tank, as for gas water heaters. Fig. 7b. For installation
with a gas water heater, a water preheat tank must be
installed.
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