5188238-YIM-D-0518
46
Johnson Controls Ducted Systems
Error Message
The UCB will initiate a error message associated with errors
within the system.
Reset
Remove the call for cooling, by raising thermostat setting higher
than the conditioned space temperature. This resets any
pressure or evaporator low limit error messages.
Electric Heat Anticipator Setpoints
It is important that the anticipator setpoint be correct. Too high
of a setting will result in longer heat cycles and a greater
temperature swing in the conditioned space. Reducing the
value below the correct setpoint will give shorter “ON” cycles
and may result in the lowering of the temperature within the
conditioned space. Refer to Table 19 for the required electric
heat anticipator setting.
Start-up (Cooling)
Prestart Check List
After installation has been completed:
1.
Check the electrical supply voltage being supplied. Be sure
that it is the same as listed on the unit nameplate.
2.
Set the room thermostat to the off position.
3.
Turn unit electrical power on.
4.
Set the room thermostat fan switch to on.
5.
Check indoor blower rotation.
• If blower rotation is in the wrong direction. Refer to
Phasing Section in general information section.
• Check blower drive belt tension.
6.
Check the unit supply air (CFM). See “CHECKING
SUPPLY AIR CFM” on page 42.
7.
Measure evaporator fan motor's amp draw.
8.
Set the room thermostat fan switch to off.
9.
Turn unit electrical power off.
Operating Instructions
1.
Turn unit electrical power on.
2.
Set the room thermostat setting to lower than the room
temperature.
3.
Compressor will energize after the built-in time delay (five
minutes).
Post Start Check List
1.
Verify proper system pressures.
2.
Measure the temperature drop across the evaporator coil.
3.
Measure the system Amperage draw across all legs of 3
phase power wires.
Table 18: Electric Heat Limit Setting
Voltage
kW
Temperature Limit
Switch
Open Temperature
°F
208-1-60
5
1
140
7
1,3
140
10
1,2,3
140
15
2,4,6
140
20
1,2,3,4,5
140
6
150
30
1,2,3,4,5,6
150
230-3-60
5
1,2,3
140
7
1,2,3
140
10
1,2,3
150
15
2,4,6
140
20
1,2,3,4,5,6
150
30
1,3,5
160
2,4,6
150
460-3-60
7
2,4,6
140
10
2,4,6
140
15
2,4,6
140
20
3
160
30
3
150
575-3-60
10
2,4,6
140
15
2,4,6
140
20
5
160
30
5
150
Table 19: Electric Heat Anticipator Setpoints
Heater
Kw
Voltage
Setting, Amps
TH1
TH2
5
230-1-60
230-3-60
0.024
0.35
7
0.024
0.35
10
0.024
0.35
15
0.024
0.35
20
0.024
0.35
30
0.024
0.35
7
460-3-60
0.024
0.35
10
0.024
0.35
15
0.024
0.35
20
0.024
0.37
30
0.024
0.37
10
575-3-60
0.024
0.35
15
0.024
0.35
20
0.024
0.37
30
0.024
0.37
