Heating Control - Carrier Weathermaster 48P2030-100 Controls, Start-Up, Operation, Service, And Troubleshooting

Heating Control

The P Series ComfortLink controls offer control for five differ-
ent types of heating systems to satisfy general space heating re-
quirements: 2-stage gas heat, 2-stage electric heat, multiple-
stage gas heat, modulating gas heat, and hydronic heat. Heat-
ing control also provides tempering and reheat functions.
These functions are discussed in separate sections. Reheat is
discussed under Dehumidification functions on page 88.
Variable air volume (VAV) type applications (C.TYP = 1 or 2)
require that the space terminal positions be commanded to
open to minimum heating positions when gas or electric heat
systems are active, to provide for the unit heating system's
Minimum Heating Airflow rate.
Also, for VAV applications, the heat interlock relay (HIR)
function provides the switching of a control signal intended for
use by the VAV terminals. This signal must be used to com-
mand the terminals to open to their Heating Open positions.
The HIR is energized whenever the Heating mode is active, an
IAQ pre-occupied force is active, or if fire smoke modes, pres-
surization, or smoke purge modes are active.
Hydronic heating applications that use the unit's control re-
quire the installation of a communicating actuator on the hy-
dronic heating coil's control valve. This actuator (with or with-
out matching control valve) may be separately shipped for field
installation.
All heating systems are available as factory-installed options.
The hydronic heating coil may also be field-supplied and field-
installed; the actuator is still required if unit control will be
used to manage this heating sequence.
SETTING UP THE SYSTEM
The essential heating configurations are located at the local
display under Configuration
ITEM
HEAT HEATING CONFIGURATION
HT.CF Heating Control Type
HT.SP Heating Supply Air Setpt
OC.EN Occupied Heating Enabled
LAT.M MBB Sensor Heat Relocate
SG.CF STAGED HEAT CONFIGS
HT.ST Staged Heat Type
CAP.M Max Cap Change per Cycle
M.R.DB St.Ht DB min.dF/PID Rate
S.G.DB St.Heat Temp. Dead Band
RISE Heat Rise dF/sec Clamp
LAT.L LAT Limit Config
LIM.M Limit Switch Monitoring?
SW.H.T Limit Switch High Temp
SW.L.T Limit Switch Low Temp
HT.P Heat Control Prop. Gain
HT.D Heat Control Derv. Gain
HT.TM Heat PID Rate Config
HH.CF HYDRONIC HEAT CONFIGS
HW.P Hydronic Ctl.Prop. Gain
HW.I Hydronic Ctl.Integ. Gain
HW.D Hydronic Ctl.Derv. Gain
HW.TM Hydronic PID Rate Config
ACT.C HYDR.HEAT ACTUATOR CFGS.
SN.1 Hydronic Ht.Serial Num.1
SN.2 Hydronic Ht.Serial Num.2
SN.3 Hydronic Ht.Serial Num.3
SN.4 Hydronic Ht.Serial Num.4
C.A.LM Hydr.Ht.Ctl.Ang.Lo Limit
*Some defaults are model number dependent.

HEAT. See Table 40.
Table 40 — Heating Configuration
EXPANSION
Heating Control Type (HT.CF)
The heating control types available are selected/configured
with this variable.
0 = No Heat
1 = Electric Heat
2 = 2 Stage Gas Heat
3 = Staged Gas Heat or Modulating Gas Heat
4 = Hydronic Heat
5 = SCR Electric Heat
Heating Supply Air Set Point (HT.SP)
In a low heat mode for either staged gas, modulating gas, SCR
electric, or hydronic heat, this is the supply air set point for
heating.
Occupied Heating Enable (OC.EN)
This configuration only applies when the unit's control type

(Configuration UNIT
RAT) or 2 (VAV-SPT). If the user wants to have the capability
of performing heating throughout the entire occupied period,
then this configuration needs to be set to "YES." Most installa-
tions do not require this capability, and if heating is installed, it
is used to heat the building up in the morning. In this case, set
OC.EN to "NO."
NOTE: This unit does not support simultaneous heating and cool-
ing. If significant simultaneous heating and cooling demand is ex-
pected, it may be necessary to provide additional heating or cool-
ing equipment and a control system to provide occupants with
proper comfort.
NOTE: If the user does not relocate this sensor for the 2-stage
electric or gas heating types and is under CCN Linkage, then the
control will send a heating mode (if present) unconditionally to the
linkage coordinator in the CCN zoning system regardless of the
leaving-air temperature.
RANGE UNITS
0 to 5
80 to 120 dF
Yes/No
Yes/No
0 to 8
5 to 45
0 to 5
0 to 5 ^F
0.05 to 0.2
0 to 20 ^F
Yes/No
80 to 210 dF
80 to 210 dF
0 to 1.5
0 to 1.5
30 to 300 sec
0 to 1.5
0 to 1.5
0 to 1.5
15 to 300 sec
0 to 9999
0 to 6
0 to 9999
0 to 254
0 to 90
60

C.TYP) is configured for 1 (VAV-
CCN POINT DEFAULT
HEATTYPE 0*
SASPHEAT 85
HTOCCENA No
HTLATMON No
HTSTGTYP 0*
HTCAPMAX 45*
HT_MR_DB 0.5
HT_SG_DB 2
HTSGRISE 0.06
HTLATLIM 10
HTLIMMON Yes
HT_LIMHI 170*
HT_LIMLO 160*
HT_PGAIN 1
HT_DGAIN 1
HTSGPIDR 90*
HW_PGAIN 1
HW_IGAIN 1
HW_DGAIN 1
HOTWPIDR 90
HTCL_SN1 0
HTCL_SN2 0
HTCL_SN3 0
HTCL_SN4 0
HTCLCALM 85