Controls, Start-Up, Operation, Service and ... - Climayoreo
Controls, Start-Up, Operation, Service and ... - Climayoreo
Controls, Start-Up, Operation, Service and ... - Climayoreo
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P = K * BP.P * (error)<br />
I = K * BP.I * (error) + “I” calculated last time through the PID<br />
D = K * BP.D * (error – error computed last time through the<br />
PID)<br />
Power exhaust control signal (limited between BP.MN <strong>and</strong><br />
(BP.1M/BP.2M) %) = P + I + D<br />
ConfigurationBPBP.CF = 3 (VFD Controlling Exhaust<br />
Fan Motors) — The VFD controlling high-capacity power<br />
exhaust consists of an exhaust fan VFD (OutputsFANS<br />
E.VFD) enabled by one power exhaust relay (OutputsFANS<br />
P.E.1). If building pressure (PressuresAIR.PBP) rises<br />
above the building pressure set point (BP.SP) <strong>and</strong> the supply fan<br />
is on, then building pressure control is initialized. Thereafter, if<br />
the supply fan relay goes off or if the building pressure drops below<br />
the BP.SP minus the building pressure set point offset<br />
(BP.SO) for 5 continuous minutes, building pressure control<br />
will be stopped. The 5-minute timer will continue to re-initialize<br />
while the VFD is comm<strong>and</strong>ed to a position > 0%. If the building<br />
pressure falls below the set point, the VFD will slow down automatically.<br />
Any time building pressure control becomes active,<br />
the exhaust fan relay turns on which energizes the exhaust fan<br />
VFD. Control is performed with a PID loop where:<br />
Error = BP – BP.SP<br />
K = 1000 * BP.TM/60 (normalize the PID control for run rate)<br />
P = K * BP.P * (error)<br />
I = K * BP.I * (error) + “I” calculated last time through the PID<br />
D = K * BP.D * (error – error computed last time through the<br />
PID)<br />
*Some configurations are model number dependent.<br />
Table 56 — Building Pressure Configuration<br />
73<br />
VFD control signal (clamped between BP.MN <strong>and</strong> BP.MX%)<br />
= P + I + D<br />
NOTE: Do not change values of PID set point without<br />
approval from Carrier.<br />
BP.CF = 4 (High-Capacity Exhaust Control) — Control is<br />
accomplished with a VFD <strong>and</strong> two exhaust fan relays. Highcapacity<br />
power exhaust consists of an exhaust fan VFD<br />
(OutputsFANSE.VFD) enabled by one power exhaust<br />
relay (OutputsFANSP.E.1) <strong>and</strong> a second power exhaust<br />
relay (OutputsFANSP.E.2) which controls a single speed<br />
fan which is equal in capacity to the VFD running at full speed.<br />
Controlling high-capacity power exhaust differs from normal<br />
power exhaust in the following ways:<br />
• The integral term is not used. The percentile comm<strong>and</strong>ed<br />
speed of the VFD is used instead.<br />
• A “clamp percent” configuration is added (BP.CL) to<br />
create a deadb<strong>and</strong> that will assist the algorithm in<br />
controlling the second power exhaust relay.<br />
If building pressure (BP) rises above the building pressure set<br />
point (BP.SP) <strong>and</strong> the supply fan is on, building pressure control<br />
is initiated. Thereafter if the supply fan relay goes off or if<br />
the building pressure drops below the BP.SP minus the building<br />
pressure set point offset (BP.SO) for 5 continuous minutes,<br />
building pressure control will be stopped. The 5-minute timer<br />
will continue to reset while the VFD is comm<strong>and</strong>ed to a position<br />
> 0%. If the building pressure falls below the set point, the<br />
VFD will shut down automatically. Any time building pressure<br />
control becomes active, the exhaust fan relay turns on which<br />
energizes the exhaust fan VFD.<br />
ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT<br />
BP BUILDING PRESS. CONFIGS<br />
BP.CF Building Press. Config 0 - 5 BLDG_CFG 0*<br />
BP.S Building Pressure Sensor Enable/Disable BPSENS Disable*<br />
BP.R Bldg. Press. (+/-) Range 0.10 - 0.25 "H2O BP_RANGE 0.25<br />
BP.SP Building Pressure Setp. -0.25 - 0.25 "H2O BPSP 0.05<br />
BP.SO BP Setpoint Offset 0 - 0.5 "H2O BPSO 0.05<br />
BP.P1 Power Exhaust On Setp.1 0 - 100 % PES1 25<br />
BP.P2 Power Exhaust On Setp.2 0 - 100 % PES2 75<br />
B.V.A VFD/ACTUATOR CONFIG<br />
BP.FS VFD/Act. Fire Speed/Pos. 0 - 100 % BLDGPFSO 100<br />
BP.MN VFD/Act. Min.Speed/Pos. 0 - 50 % BLDGPMIN 10<br />
BP.MX VFD Maximum Speed 50 - 100 % BLDGPMAX 100<br />
BP.1M BP 1 Actuator Max Pos. 85 - 100 % BP1SETMX 100<br />
BP.2M BP 2 Actuator Max Pos. 85 - 100 % BP2SETMX 100<br />
BP.CL BP Hi Cap VFD Clamp Val. 5 - 25 % BLDGCLMP 10<br />
FAN.T FAN TRACKING CONFIG<br />
FT.CF Fan Track Learn Enable Yes/No DCFM_CFG No<br />
FT.TM Fan Track Learn Rate 5-60 min DCFMRATE 15<br />
FT.ST Fan Track Initial DCFM -20000 - 20000 CFM DCFMSTRT 2000<br />
FT.MX Fan Track Max Clamp 0 - 20000 CFM DCFM_MAX 4000<br />
FT.AD Fan Track Max Correction 0 -20000 CFM DCFM_ADJ 1000<br />
FT.OF Fan Track Internl EEPROM -20000 - 20000 CFM DCFM_OFF 0<br />
FT.RM Fan Track Internal RAM -20000 - 20000 CFM DCFM_RAM 0<br />
FT.RS Fan Track Reset Internal Yes/No DCFMRSET No<br />
SCF.C Supply Air CFM Config 1 - 2 SCFM_CFG 1<br />
B.PID BLDG.PRESS.PID CONFIGS<br />
BP.TM Bldg.Pres.PID Run Rate 5 - 120 sec BPIDRATE 10<br />
BP.P Bldg.Press. Prop. Gain 0 - 5 BLDGP_PG 0.5<br />
BP.I Bldg.Press. Integ. Gain 0 - 2 BLDGP_IG 0.5<br />
BP.D Bldg.Press. Deriv. Gain 0 - 5 BLDGP_DG 0.3<br />
ACT.C BLDG.PRES. ACTUATOR CFGS<br />
BP.1 BLDG.PRES. ACT.1 CONFIGS<br />
SN.1 BP 1 Serial Number 1 0 - 9999 BP_1_SN1 0<br />
SN.2 BP 1 Serial Number 2 0 - 6 BP_1_SN2 0<br />
SN.3 BP 1 Serial Number 3 0 - 9999 BP_1_SN3 0<br />
SN.4 BP 1 Serial Number 4 0 - 254 BP_1_SN4 0<br />
C.A.LM BP1 Cntrl Angle Lo Limit 0-90 BP1_CALM 35<br />
BP.2 BLDG.PRES. ACT.2 CONFIGS<br />
SN.1 BP 2 Serial Number 1 0 - 9999 BP_2_SN1 0<br />
SN.2 BP 2 Serial Number 2 0 - 6 BP_2_SN2 0<br />
SN.3 BP 2 Serial Number 3 0 - 9999 BP_2_SN3 0<br />
SN.4 BP 2 Serial Number 4 0 - 254 BP_2_SN4 0<br />
C.A.LM BP2 Cntrl Angle Lo Limit 0-90 BP2_CALM 35