40
Humidi-MiZer System
In the Humidi-MiZer (HMZR) sub-menu, it will be possible to
control and calibrate the Humidi-MiZer modulating valves (gas
bypass and condenser) while the unit’s compressors are OFF. Cal-
ibration is a mode in which the unit software will first over-drive
each valve in the closing direction. This is to ensure that the valve
is completely shut and to establish the “zero” open position. The
controller then keeps track of the valve’s position for normal oper-
ation. During this calibration phase, a light ratcheting sound may
be heard and will serve as proof of valve operation and closure.
Note that the calibration feature in Service Test is only provided as
an additional troubleshooting tool. The valves will automatically
go through the calibration process anytime the unit is powered
down, unit power is cycled, or anytime there is a loss of communi-
cation between the EXV board and the valve. There should be no
need to manually calibrate the valves under normal circumstances.
This sub-menu also allows manual manipulation of RHV (reheat
3-way valve), the bypass valve, and condenser valve. With the
compressors and outdoor fans off, the user should hear a light
ratcheting sound during movement of the two modulating valves.
The sound can serve as proof of valve operation.
SERVICE TEST
HMZR
RHV (HUMIDI-MIZER 3-WAY
VALVE)
On Humidi-MiZer equipped units, this item allows the user to
switch the reheat valve from ON to OFF or OFF to ON when
compressors are in the OFF position. When RHV is switched to
the ON position, the three-way valve will be energized. When
RHV is switched to the OFF position, the three-way valve will be
deenergized. To exercise this valve with a Circuit B compressor
commanded ON, go to (Service Test
COOL
RHV). To view
the actual valve position at any time, the user can use the Outputs
menu (Outputs
COOL
RHV).
SERVICE TEST
HMZR
C.EXV (HMV-1: CONDENSER
EXV POSITION)
On Humidi-MiZer equipped units, this item allows the user to ex-
ercise the valve that controls flow to the Circuit B condenser. The
valve default position is 100% (completely open). The user will be
able to adjust the valve from 0 to 100% through this function. As
confirmation that the valve is operational, the user should hear a
light ratcheting sound as the valve opens and closes. Note that this
function is only operational when Circuit B compressors are OFF.
To exercise this valve with a Circuit B compressor commanded
ON, go to Service Test
COOL
C.EXV. To view the actual
valve position at any time, the user can use the Outputs menu
(Outputs
COOL
C.EXV).
SERVICE TEST
HMZR
B.EXV (HMV-2: BYPASS EXV
POSITION)
On Humidi-MiZer equipped units, this item allows the user to ex-
ercise the valve that controls discharge gas bypass around the Cir-
cuit B condenser. The valve default position is 0% (completely
closed). The user will be able to adjust the valve from 0 to 100%
through this function. As confirmation that the valve is operation-
al, the user should hear a light ratcheting sound as the valve opens
and closes. Note that this function is only operational when
Circuit B compressors are OFF. To exercise this valve when a Cir-
cuit B compressor is ON, go to (Service Test
COOL
B.EXV).
To view the actual valve position at any time, the user can use the
Outputs menu (Outputs
COOL
B.EXV).
SERVICE TEST
HMZR
C.CAL (CONDENSER EXV
CALIBRATE)
On Humidi-MiZer configured units, this item allows the user to
calibrate the valve that controls flow to the Circuit B condenser.
Switching C.CAL to ON will instruct the unit software to over-
drive the valve in the closing direction. This is to ensure that the
valve is completely shut and to establish the “zero” open position.
The controller then keeps track of the valve’s position for normal
operation. During this calibration phase, a light ratcheting sound
may be heard and will serve as proof of valve operation and clo-
sure. Note that the calibration feature in Service Test is only pro-
vided as an additional troubleshooting tool. The valves will auto-
matically go through the calibration process anytime the unit is
powered down, unit power is cycled, or communication is lost be-
tween the EXV board and the valve. There should be no need to
manually calibrate the valves under normal circumstances.
COOL TEST COOLING
E.POS Econo Damper Command Pos 0 to 100 % ECONCOOL
SP.SP Static Pressure Setpoint 0 to 5 "H2O SPSP_TST
CL.ST Requested Cool Stage 0 to n CLST_TST
MLV Minimum Load Valve Relay ON/OFF MLV_TST
A1 Compressor A1 Relay ON/OFF CMPA1TST
A1.CP Compressor A1 Capacity 20 to 100 A1CAPTST
A1.B1 Two Circuit Start A1,B1 ON/OFF CMPABTST
A2 Compressor A2 Relay ON/OFF CMPA2TST
A3 Compressor A3 Relay ON/OFF CMPA3TST
B1 Compressor B1 Relay ON/OFF CMPB1TST
B2 Compressor B2 Relay ON/OFF CMPB2TST
B3 Compressor B3 Relay ON/OFF CMPB3TST
RHV Humidimizer 3-Way Valve ON/OFF RHVH_TST
C.EXV Condenser EXV Position 0 to 100 % CEXVHTST
B.EXV Bypass EXV Position 0 to 100 % BEXVHTST
HEAT TEST HEATING
HT.ST Requested Heat Stage 0 to n HTST_TST
HT.1 Heat Relay 1 ON/OFF HS1_TST
H1.CP Modulating Heat Capacity 0 to 100 % MGAS_TST
HT.2 Heat Relay 2 ON/OFF HS2_TST
HT.3 Relay 3 W1 Gas Valve 2 ON/OFF HS3_TST
HT.4 Relay 4 W2 Gas Valve 2 ON/OFF HS4_TST
HT.5 Relay 5 W1 Gas Valve 3 ON/OFF HS5_TST
HT.6 Relay 6 W2 Gas Valve 3 ON/OFF HS6_TST
H.I.R Heat Interlock Relay ON/OFF HIR_TST
HTC.C Ht.Coil Command Position 0 to 100 % HTCLHEAT
Table 30 — Service Test (cont)
ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS
To Next Page
Loading...
