Enthalpy Switch/Receiver And Enthalpy Sensor - Carrier ZS Standard Installation Manual

Enthalpy switch/receiver and Enthalpy sensor

Enthalpy switch/receiver - Part #33CSENTHSW
Enthalpy sensor - Part #33CSENTSEN
Outdoor enthalpy control
Requires a field-installed enthalpy switch/receiver. The enthalpy switch/receiver, mounted in the outdoor air
intake, senses temperature and humidity of the surrounding air and calculates the enthalpy.
The enthalpy switch/receiver:
•
•
The relay output is wired to the unit economizer which opens or closes based on the output of the switch.
Differential enthalpy control
Requires an enthalpy switch/receiver and an enthalpy sensor. The enthalpy switch/receiver, mounted in the
outdoor air intake, calculates outdoor air enthalpy. The enthalpy sensor, mounted in the return airstream,
calculates the indoor air enthalpy.
The enthalpy switch/receiver energizes:
•
•
The relay output is wired to the unit economizer which opens or closes based on the output of the switch.
NOTE The enthalpy is calculated using an average altitude of 1000 ft above sea level.
Enthalpy switch/receiver
Carrier Sensors
Installation Guide
Downloaded from ManualsNet.com
Energizes the relay output when the outdoor enthalpy is above 28 BTU/lb OR dry bulb temperature is above
75° F
De-energizes the relay output when the outdoor enthalpy is below 27 BTU/lb AND dry bulb temperature is
below 74.5° F.
The HI Enthalpy relay output when the outdoor enthalpy is greater than the indoor enthalpy
The LOW Enthalpy terminal when the outdoor enthalpy is lower than the indoor enthalpy
4.25 in.
(10.8 cm )
33CSENTHSW
RETURN AI R
ENTH SENSO R
- +
4-20 24-36
HI LOW GND 24
mA In VDC
Enthalpy V AC
out
Model #: HH57ZC003
Power: 24 VAC
Output: 10 A Form 1C Relay w/
24 VAC Sourced Power
3.75 in.
(9.5 cm)
search engine
Enthalpy sensor
3.35 in.
(8.5 cm)
Mode l #: HH57ZC001
Power: 24 to 36 VDC
Span: 0 to 50 BTU/lb
Output: 4 to 20 mA
63
Enthalpy switch/receiver and Enthalpy sensor
4.25 in.
(10.8 cm)
33CSENTSEN
+ -
4-20 24-36
mA In VDC
out 3.35 in.
(8.5 cm )
3.75 in.
(9.5 cm )
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