Appendix
37
HB Controller Technical Guide
Appendix
The HB controller has many setpoints that are user-adjustable. This
adjustability allows the installer complete control of all major unit
operating characteristics during the setup and commissioning phase
of the HB unit installation. It also gives a service technician the ability
to change setpoints to monitor and record unit operation to determine
if the unit is functioning as specifi ed. The tables that follow show the
available setpoints for each classifi cation or control group provided on
the HB controller.
Supply Fan Control Setpoints
Description Min. Default Max.
Adj. Two-Speed Fan -
Two-Speed Fan -
Low-Speed Fan Signal 1.0 VDC 3.0 VDC 10.0 VDC
High-Speed Fan Signal 1.0 VDC 10.0 VDC 10.0 VDC
Table 5: Supply Fan Control Setpoints
Cooling Control Setpoints
Description Min. Default Max.
Cooling Stages 1 2 2
Minimum Off Time 180 Sec 180 Sec 900 Sec
Minimum On Time 300 Sec 300 Sec 900 Sec
Staging Up Delay Interval 180 Sec 180 Sec 900 Sec
Staging Down Delay Interval 60 Sec 60 Sec 900 Sec
Low Pressure Delay Period 5 Sec 30 Sec 60 Sec
Low Pressure Safety 5 Sec 5 Sec 30 Sec
Low Pressure Max. Trip Point 1 3 5
Fan Off Delay Period 1 Sec 45 Sec 120 Sec
Auto Staging Up Delay 180 Sec 600 Sec 900 Sec
Dehumidify Staging Up Delay 180 Sec 600 Sec 900 Sec
Table 6: Cooling Control Setpoints
Heating Control Setpoints
Description Min. Default Max.
Heating Stages 1 3 3
Minimum Off Time 60 Sec 60 Sec 900 Sec
Minimum On Time 120 Sec 120 Sec 900 Sec
Staging Up Delay Interval 180 Sec 180 Sec 900 Sec
Staging Down Delay Interval 60 Sec 60 Sec 900 Sec
Heat Safety Maximum Count 1 3 5
Fan Off Delay Period 1 Sec 120 Sec 180 Sec
Auto Staging Up Delay 180 Sec 600 Sec 900 Sec
Table 7: Heating Control Setpoints
Temperature Control Setpoints
Description Min. Default Max.
Cooling Lockout Temperature 32ºF 40ºF 80ºF
Heating Lockout Temperature 40ºF 80ºF 120ºF
Supply Air High Temperature
Limit Cutoff
120ºF 150ºF 170ºF
Supply Air Low Temperature
Limit Cutoff
32ºF 40ºF 80ºF
Table 8: Temperature Control Setpoints
Economizer Control Setpoints
Description Min. Default Max.
Econo Confi gNo
Economizer
Max. CO
2
0 PPM 1100 PPM 2000 PPM
Min. CO
2
0 PPM 900 PPM 2000 PPM
Outdoor Air Enable Temp 33ºF 55ºF 65ºF
ECS OAT Enable Temp 55ºF 65ºF 75ºF
Table 9: Economizer Control Setpoints
Exhaust Fan Control Setpoints
Description Min. Default Max.
Low-Speed Supply Fan 0% 50% 100%
High-Speed Supply Fan 0% 30% 100%
Table 10: Exhaust Fan Control Setpoints
Min. Damper Reset Position Setpoints
For Adjustable Two-Speed Fan/CO
2
Description Min. Default Max.
Max. with Low-Speed Fan 0% 50% 100%
Min. with Low-Speed Fan 0% 10% 100%
Max. with High-Speed Fan 0% 30% 100%
Min. with High-Speed Fan 0% 5% 100%
Table 11: Minimum Damper Reset Setpoints
(70 stránky)
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