Specifications

55
Table 63 — Building Pressure Configuration
*Some configurations are machine dependent.
Table 64 — Power Exhaust Staging ( BP.CF =1)
Table 65 — Power Exhaust Staging (
BP.CF =2)
The configurations of interest in the controlling of building
pressure with this algorithm are:
• Configuration
→ BP → B.CFG → BP.HP (building pressure
high threshold level)
• Configuration
→ BP → B.CFG → BP.LP (building pressure
low threshold level)
• Configuration
→ BP → B.CFG → BP.TM (building pressure
timer)
This control function is allowed to add or select power ex-
haust stages at any time, except that a delay time must expire
after a stage is added or subtracted. Any time a stage change is
made, a timer is started which delays staging for 10 * BP.TM
seconds. The default for BP.TM is 1, therefore the delay
between stage changes is set to 10 seconds.
The logic to add or subtract a stage of power exhaust is:
• If building pressure (Pressures
→ AIR.P → BP) is greater
than the building pressure set point (Configuration
→
BP → BPSP) plus the building pressure high threshold level
(Configuration
→ BP → B.CFG → BP.HP) add a stage of
power exhaust.
• If building pressure (Pressures
→ AIR.P → BP)islessthan
the building pressure set point (Configuration →
BP → BPSP) minus the building pressure low threshold
level (Configuration
→ BP → B.CFG → BP.LP) subtract a
stage of power exhaust.
ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT
BP BUILDING PRESS. CONFIG
BP.CF Building Press. Config 0-2 BLDG_CFG 0*
BP.MT Power Exhaust Motors 1-2 PWRM 1*
BP.S Building Pressure Sensor Enable/Dsable BPSENS Dsable*
BP.R Bldg Press (+/–) Range 0 - 1.00 BP_RANGE 0.25
BP.SP Building Pressure Setp. -0.25 -> 0.25 "H2O BPSP 0.05
BP.P1 Power Exhaust On Setp.1 0 - 100 % PES1 35
BP.P2 Power Exhaust On Setp.2 0 - 100 % PES2 75
B.CFG BP ALGORITHM CONFIGS
BP.SL Modulating PE Alg. Slct. 1-3 BPSELECT 1
BP.TM BP PID Evaluation Time 0 - 10 min BPPERIOD 1
BP.ZG BP Threshold Adjustment 0.1 - 10.0 BPZ_GAIN 1
BP.HP High BP Level 0 - 1.000 BPHPLVL 0.05
BP.LP Low BP Level 0 - 1.000 BPLPLVL 0.04
BP.MT = 1 (4 motors) PE.A PE.B PE.C
Power Exhaust Stage 0 OFF OFF OFF
Power Exhaust Stage 1 OFF ON OFF
Power Exhaust Stage 2 ON ON ON
BP.MT = 2 (6 motors) PE.A PE.B PE.C
Power Exhaust Stage 0 OFF OFF OFF
Power Exhaust Stage 1 OFF OFF ON
Power Exhaust Stage 2 ON ON ON
BP.MT = 1 (4 motors) PE.A PE.B PE.C
Power Exhaust Stage 0 OFF OFF OFF
Power Exhaust Stage 1 ON OFF OFF
Power Exhaust Stage 2 OFF ON OFF
Power Exhaust Stage 3 ON ON OFF
Power Exhaust Stage 4 ON ON ON
BP.MT = 2 (6 motors) PE.A PE.B PE.C
Power Exhaust Stage 0 OFF OFF OFF
Power Exhaust Stage 1 ON OFF OFF
Power Exhaust Stage 2 OFF ON OFF
Power Exhaust Stage 3 ON ON OFF
Power Exhaust Stage 4 ON OFF ON
Power Exhaust Stage 5 OFF ON ON
Power Exhaust Stage 6 ON ON ON