Aprilaire 6303 Thermostat User Manual


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P.O. BOX 1467 • MADISON, WI 53701-1467
Call toll-free 1-800/334-6011 • Fax 608/257-4357
10006007 11.05
B2203179C
©2005 Research Products Corporation
Printed in USA
1ST
STG
COMP.
REV
VALVE
HEAT
DEFROST
OUTDOOR UNIT
LOW VOLTAGE CONTROL ONLY
REV
VALVE
COOL
CWBYO
AUX.HEAT/
EMERG. HEAT
FAN
RELAY
R
C
W2
Y
G
COMP.
L1
L2
120
VAC
24
VAC
120
VAC
24
VAC
TRANSFORMER
Aprilaire
®
MODEL 6303
CONTROL PANEL
SHOWN WITH TYPICAL SINGLE STAGE HEAT PUMP AND ONE STAGE OF SUPPLEMENT HEAT
R
G
Y
W
X
FAN AUTO
FAN ON
HEAT
COOL
OFF
1ST STAGE HEAT
1ST
STAGE
COOL
AIR HANDLER
LOW VOLTAGE
CONTROL ONLY
24V (HOT)
24V (COMMON)
REV. VALVE - COOL
AUXILIARY HEAT
COMPRESSOR
FAN
REQUIRED
24V (HOT)
24V (COMMON)
HEAT
COOL
ZONE 1 THERMOSTAT
HEAT PUMP THERMOSTAT
(If Heat/Cool thermostat, wire same as Zone 2)
ZONE 2 THERMOSTAT
MUST NOT BE HEAT PUMP THERMOSTAT
USE SEPARATE 24VAC TRANSFORMER - DO
NOT USE HVAC SYSTEM TRANSFORMER
RECOMMENDED HEAT PUMP THERMOSTATS
(ZONE 1 ONLY)
Aprilaire® 8346: non-programmable
Aprilaire® 8365: 5/2 day programmable
Aprilaire® 8570: 7 day programmable
RECOMMENDED HEAT/COOL THERMOSTATS
(ZONES 1-3)
Aprilaire® 8344: non-programmable
Aprilaire® 8363: 5/2 day programmable
Aprilaire® 8570: 7 day programmable
FIELD INSTALLED JUMPER
REQUIRED FOR SINGLE
TRANSFORMER SYSTEMS
6303 WIRING DIAGRAM
ZONE 1
DAMPER
OPTIONAL
8052
Sensor
CONTROL PANEL SET UP
1. Set Z1 HC/Z1 HP pin jumper block to the left two pins (Z1 HC) if installing a heat/cool thermostat in Zone 1.
Set the pin jumper block to the right two pins (Z1 HP) if installing a heat pump thermostat in Zone 1 for
thermostat control of Emergency Heat.
2. Set GAS/ELECTRIC pin jumper block to the right two pins (ELECTRIC) for most installations. This will
energize the Fan (G equipment terminal) with an Auxiliary or Emergency Heat Call (W). Set the pin jumper block
to the left two pins (GAS) if the auxiliary heat source is gas (or propane or oil).
3. Set the PURGE/NO PURGE pin jumper block to the left two pins (PURGE) if it is desired to have the zone
control panel control a 60 second purge cycle at the end of a cool call or electric heat call. Set the pin jumper
block to the right two pins (NO PURGE) if equipment control of the purge cycle is desired.
4. Set the HT-160/120 pin jumper block to the left two pins (Ht-160) to cut out the heating equipment at 160°F to
prevent overheating. Set the HT-160/120 pin jumper block to the right two pins (Ht-120) to cut out the heating
equipment at 120°F.
5. Set the CL-45/40 pin jumper block to the left two pins (CL-45) to cut out cooling equipment at 45°F to prevent
freezing the indoor cooling coil. Set the pin jumper block to the right two pins (CL-40) to cut out cooling
equipment at 40°F.
6. Ensure that the E-HEAT switch, in the lower left hand corner of the control panel, is in the off position.
7. Follow the Sequence of Operation to checkout the system after installation. Push and hold the TDO button to
speed up the internal clock and avoid built in time delays.
O
R
G
Y
W2
B
X
L
FAN AUTO
HEAT or COOL
FAN
ON
EHEAT
HEAT
COOL
OFF
1ST
STAGE
EHEAT
HEAT
COOL
OFF
OPTIONAL
Normal Flashing LED not flashing
No Heat call or Cool call
- TSTATS not operating properly. If Zone 1 is set up as a heat pump thermostat, it requires an O + Yfor cool call
and Y for a heat call.
- 4 minute minimum off time delay in effect - push TDO
- Missing jumper between equipment RH&RC - required for single transformer systems
- Equipment interrupt due to high/low temperature limit
- Heat/Cool Changeover limit in effect and an opposing call is being answered in another zone
No power to control panel - check power wiring
Won't stop calling
Minimum on time delay in effect (2 minutes for heat, 4 minutes for cool)
SYMPTOM
CAUSE
TROUBLESHOOTING
Heat calls being satisfied with Emergency Heat
- Heat Pump TSTAT installed in Zone 1: If Zone 1 is in Emergency Heat mode, all heat calls from other zones will be
satisfied with Emergency Heat until Zone 1 makes a compressor call (normal heat or cool call).
- Onboard E-HEAT switch is in the ON position and all calls for heat answered with Emergency Heat
No Emergency Heat Call
- Zone 1 W terminal not energized or energized with Y terminal
- Onboard E-HEAT switch in the OFF position (Heat/Cool TSTATS installed in all zones)
FUSE - 3A
NO
NC
C
R
W
Y
G
NO
NC
C
R
W
Y
G
O
24V
W2
RC
RH
EQUIPMENT OUTPUTS
B
O
G
Y
B TERMINAL IS NOT A 24V
COMMON CONNECTION.
AC
SPARE FUSE
NORMAL
FLASHING
T.D.O.
(TIME DELAY
OVERRIDE)
C
R
W
Y
G
NO
NC
ZONE 3
TSTAT
INPUT
S
ZONE 1
ZONE 2
ZONE 3
ELECTRIC
PURGE
HT-160
CL-45
GAS
NO
PURGE
120
40
Z1 HC
Z1 HP
PLENUM
SENSOR
E-HEAT
ON
OFF
ZONE 2
DAMPER
INPUTS
ZONE 2
TSTAT
INPUTS
ZONE 1
TSTAT
INPUTS
ZONE 1
DAMPER
INPUTS
Sensor must be installed
prior to powering up the
control panel
FAN
ZONE 3
DAMPER
INPUT
S
DAMPER WIRING NOTE
THE MAXIMUM AMOUNT OF CURRENT THAT
CAN BE SWITCHED THROUGH THE ZONE
PANEL IS 3 AMPS. IF MORE THAN 6
DAMPERS COULD BE POWERED AT ONE
TIME, INSTALL DEDICATED DAMPER
TRANSFORMERS AND A MODEL 8028
DAMPER POWER DISTRIBUTION PANEL.
WIRE ACCORDING TO THE INSTRUCTIONS
PROVIDED WITH THE MODEL 8028.
MAX # OF POWERED REQUIRED
DAMPERS TRANSFORMER
3 OR LESS 40 VA
4 THRU 6 75 VA
7 OR MORE 40 VA per 3 DAMPERS
(SEE DAMPER WIRING NOTE IF 7 OR MORE)
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