Manual 2100-721B
Page
23 of 54
TABLE 6
Wall Thermostats
Thermostat
Predominant Features
8403-060
1120-445
3 Stage Cool; 3 Stage Heat
Programmable/Non-Programmable
Electronic
HP or Conventional
Auto or Manual changeover
8403-082
(VT8600U5500B)
2 stage Cool; 2 stage Heat
Programmable/Non-Programmable
Electronic
HP or Conventional, Auto or Manual
changeover with Occupancy Sensor,
BACnet
8403-084
(VT8600U5000B)
2 stage Cool; 2 stage Heat
Programmable/Non-Programmable
Electronic
HP or Conventional, Auto or Manual
changeover with BACnet
8403-089
(T4 Pro)
1 stage Cool; 1 stage Heat – Heat Pump
1 stage Cool; 1 stage Heat – Conventional
Programmable/Non-Programmable
Electronic
Auto or Manual changeover
8403-090
(T6 Pro)
2 stage Cool; 3 stage Heat – Heat Pump
2 stage Cool; 2 stage Heat – Conventional
Programmable/Non-Programmable
Electronic
Auto or Manual changeover
8403-091
(T701-FEMA)
1 stage Cool, 1 stage Heat
Non-Programmable
FEMA use
8403-092
(T6 Pro Wi-Fi)
2 stage Cool, 3 stage Heat – Heat Pump
2 stage Cool, 2 stage Heat – Conventional
Programmable/Non-Programmable
Electronic
Auto or Manual changeover
Wi-Fi
high side pressure. Operation of the LAC occurs as
outdoor temperatures drop below 60°F. On/Off and
modulating controls are used which operate based
on pressure changes caused by outdoor temperature
changes. On/Off LAC operation cycles the condenser
fan on/off to maintain desired liquid pressure while
modulating LAC operation is factory adjusted and slows
the condenser fan speed (rpm).
Outdoor Temperature Switch and Freeze Protection
Thermostat
An outdoor temperature switch and an evaporator
freeze protection thermostat is supplied with all units
that have a low ambient control. The outdoor switch
disables Balanced Climate mode (if enabled) when the
temperature drops below 50°F. This prevents potential
evaporator coil freeze up issues. The freeze thermostat
cuts out compressor operation if the evaporator begins
to freeze up.
Balanced Climate Mode
If the application is likely to require air conditioning
operation below 60°F outdoor conditions, a low ambient
control (LAC) kit must be installed.
If the unit is being installed with any ventilation
package, a Bard LAC kit must be installed.
Failure to
utilize an LAC with any air conditioner can cause coil
freeze up. Balanced Climate can readily be applied to
duct-free (supply and return air grille) applications. It
may also be applied to ducted applications with
limited
rated static (total including both supply and return
statics)
. Consult Bard Application Engineering for
details prior to implementation.
CAUTION:
Balanced Climate is not a replacement for
a dehumidification (hot gas reheat) unit for extreme
applications, but rather an enhancement feature for
limited climates and applications.
17. THERMOSTATS
TABLE 7
Humidity Controls
Part Number
Predominate Features
8403-038
(H600A1014)
SPDT switching, pilot duty 50VA @ 24V;
Humidity range 20-80% RH
8403-047
(H200-10-21-10)
Electronic dehumidstat SPST closes-
on-rise; Humidity range 10-90% with
adjustable stops
TABLE 4
CO
2
Controllers
Part Number
Predominate Features
8403-056
CO
2
ventilation control with digital display.
Normally Open SPST (Default: Close at
800ppm)
8403-067
Normally Open SPST relay closes-on-rise
24V dual wave length sensor. Default setting
950ppm, adjustable to 0-2000ppm
Default off setting 1000ppm, adjustable to
0-200 ppm can be calibrated
TABLE 5
Thermostat Wire Size
Transformer
VA
FLA
Wire Gauge
Maximum
Distance
in Feet
55
2.3
20 gauge
18 gauge
16 gauge
14 gauge
12 gauge
45
60
100
160
250
