Specifications

AVPA & HVEA PDS 1/2012 rev.1 4
Controllers and Thermostats
Controllers
CommStat 4 Telecom HVAC Controller
P/N S/7846
The CommStat 4 HVAC controller is designed
specifically for controlling two redundant air
conditioners, heat pumps or air conditioners with
2-stage compressors in a telecommunication shelter.
The CommStat 4 has seven outputs for remote
alarms or notification. Status LED’s indicate HEAT,
COOL, POWER and the LEAD unit. When a fault is
detected, an alarm LED flashes and the LCD screen
displays the fault.
The CommStat 4 uses RS-485 communications
via a RJ11 jack. It is capable of interfacing with
a secondary control board which can interpret
Marvair’s communication protocol and provide
Internet capability. (Note: the end user must provide
the interface board and the Graphical User Interface
(GUI) software to gain access via the Internet). It
can be daisy chained with a second CommStat 4
controllers for controlling up to four air conditioners
in one shelter. When two CommStat 4 controllers
are daisy chained together, one is the MASTER and
the other controller is the SLAVE. Any settings to the
MASTER unit immediately take effect on the SLAVE
unit. See the CommStat 4 Product Data Sheet for
complete details.
CommStat3™ Lead/Lag Microprocessor Controller
P/N S/04581
Solid state controller designed to operate a fully
or partially redundant air conditioning system.
Insures equal wear on both air conditioners while
allowing the lag unit to assist upon demand. Lead/
lag changeover is factory set at 7 days, but is field
programmable in 1/2 day increments from 1/2 to
7 days. The CommStat 3™ Controller has LED’s
to indicate status & function, digital display of
temperature, a comfort override button for energy
savings, five alarm relays, a built in temperature
sensor and is fully programmable. See CommStat
3™ Controller Product Data Sheet for details on
operation & installation.
LL357D4 Lead/Lag Controller
Two stage heat and cool thermostat with solid
state module for redundant operation. (See the
LL357D4 Product Data Sheet for details.)
Thermostats & Thermostat Guards
Note: All air conditioners with 2-stage compressors,
models HVESA, require a 2 stage cooling thermostat.
Thermostat P/N 50123
Digital thermostat. 1 stage heat, 1 stage cool. 7
day programmable. Fan switch: Auto & On. Auto-
changeover.Keypadlockout.Non-volatileprogram
memory.
Thermostat P/N 50107
Digital thermostat. 2 stage heat, 2 stage cool.
7 day programmable. Fan switch: Auto & On.
Auto-change over. Status LED’s. Backlit display.
Programmable fan. Non-volatile program memory.
Thermostat Guard P/N 50092
Thermostat guard for use with the 50123 and
50107 thermostats.
Thermostat P/N 50186
Digital, non-programmable thermostat. 1 stage
cool and 1 stage heat. Auto-changeover.
Digital Humidistat P/N 50254
To be used with units with hot gas or electric
reheat. Programmable dehumidistatand ventilation
controller. Time of day can be set for dehumidifier
or ventilation to run. Permanent memory retention
of set points.Humidity sensor can be field calibrated.
High & low dehumidification set points. Outdoor
temperature and humidity sensor included. °F or °C
selectable.
Accessories
Supply Grilles
For AVPA20/24
20”x8”(508mmx203mm) P/N80674
For AVPA30,36 and HVEA24
28”x8”(711mmx203mm) P/N80675
For AVPA42,48,60,72 and HVEA30, 36, 42, 49, 60
30”x10”(762mmx254mm) P/N80676
Return Grilles
For AVPA20/24
20”x12”(508mmx305mm) P/N80677
For AVPA30,36 and HVEA24
28”x14”(711mmx356mm) P/N80678
For AVPA42,48,60,72 and HVEA30, 36, 42, 49, 60
30”x16”(762mmx406mm) P/N80679
Return Filter Grilles
Used when filter must be changed from the interior.
Not recommended for ComPac
®
II air conditioner.
Note:FilterusedinReturnFilterGrilleis1”(25mm)
thick.
For AVPA20/24
20”x12”(508mmx305mm) P/N80671
For AVPA30,36 and HVEA24
28”x14”(711mmx356mm) P/N80672
For AVPA42,48,60,72 and HVEA30, 36, 42, 49, 60
30”x16”(762mmx406mm) P/N80673
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