Carrier Apollo 48HJ004-024 User manual

Installation, Operation, and
Troubleshooting Instructions
GENERAL
The Apollo control is a relay pack which is factory wired
and mounted in the Carrier rooftop unit. The Apollo control
allows the unit to be connected to a thermostat and a com-
munication bus. The rooftop unit can then be used as part of
a system which is controlled by devices on the communi-
cation bus. The thermostat and communication bus wiring
must be field-installed.
Do not turn on unit power until Apollo control and ther-
mostat have been installed. Unit is shipped with loose
leads which may cause electrical shock or death.
Carrier Temp System — The Carrier Temp System
usually consists of more than one thermostat and can be ex-
panded to meet whatever number of single zone systems are
required.
The Temp System thermostat maintains proper tempera-
tures by controlling the amount of heated or cooled air sup-
plied to the area it is installed in or the area it controls (if
using a Remote Room Sensor).
Each thermostat is responsible for controlling the tem-
perature conditions in its space. Each thermostat will main-
tain its own independent occupied/unoccupied time sched-
ule and heating/cooling set points. This allows the user to
program the Temp System thermostat so that it will maintain
different temperature ranges at different times.
TempSystemComponents— The Carrier Temp Sys-
tem consists of one or more thermostats that communicate
by way of a communication bus. Each thermostat controls
an Apollo control which, in turn controls the Carrier rooftop
unit. See Fig. 1.
Each thermostat can be connected to others to provide com-
munication between thermostats. Only one thermostat per
system can have a timeclock that will broadcast time to the
rest of the system. See Fig. 2.
TEMP SYSTEM THERMOSTAT — The MST-01ES (with
timeclock) and MS-01ES (without timeclock) Temp System
thermostats (see Fig. 3) have the following features:
• controls temperature to user defined set points
• eliminates external timeclocks, manual override timer, night
low limit thermostat, battery backup, or unit time guard.
• operates with 3 system switches for supply-air fan and the
unit heating and cooling stages.
APOLLO CONTROL— TheApollo control (see Fig. 4) has
the following features:
• serves as interface between thermostat, Carrier rooftop unit,
and any external field-supplied sensors
• powered by 24 VAC/10 VA, supplies thermostat with
10 VDC. This power is supplied by the Carrier rooftop
unit.
The Apollo control must be used in conjunction with a
Carrier MST-01ES or MS-01ES master thermostat.
Figure 5 shows theApollo control factory-installed in a roof-
top unit.
Fig. 1 — Carrier Temp System Components
Fig.2—TempSystem Communication
Fig.3—TempSystem Thermostat
(MST-01ES Shown)
48/50HJ004-024
48/50TJ004-028
Apollo Control
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1144
Tab 1a1b6a6b PC 111 Catalog No. 534-800 Printed in U.S.A. Form 48/50HJ,TJ-1SI Pg 1 9-94 Replaces: New

INSTALLATION
Wiring Requirements — The wiring requirements for
the Temp System are:
THERMOSTAT TO THERMOSTAT COMMUNICATION
BUS — Use 18 gage, 3-conductor, shielded, stranded wire,
color coded (RED, BLACK, GREEN), plenum rated if re-
quired, long enough to run from thermostat to thermostat in
daisy-chain configuration.
THERMOSTAT TO APOLLO CONTROL — Use 18 gage,
5-conductor, shielded, stranded wire, color coded (RED,
WHITE, BLUE, YELLOW, GREEN), plenum rated if re-
quired, long enough to run from thermostat to the Apollo
control. The Apollo control is easily accessible in the
Carrier rooftop unit. It can be found in the control box on 3
to 25 ton 48/50 HJ units and 7
1
⁄ 2 to 25 ton 48/50TJ units. It
is found in the indoor blower section on 3 to 6 ton 48/50TJ
units.
NOTE: Do not run the thermostat communication bus and
the control wire in the same conduit for more than 5 ft. Never
run wires near any cable carrying AC voltage. For further
wiring information, consult the local Carrier
distributor.
Factory-supplied power required to eachApollo control is
24 VAC/10 VA. Typical wiring is 18 gage thermostat wire.
Power to the Apollo control may be wired to the
Carrier rooftop unit transformer if of sufficient VA capacity,
otherwise a dedicated transformer has been provided. The
maximum load of a relay contact is 24 VAC, 1 amp. A short
in the field wiring or Carrier rooftop unit will cause non-
warranty damage to the relay board. Test before attaching to
Apollo control.
Call the local Carrier representative if more information
is needed about wiring the Apollo control.
Thermostat Installation — Begin the thermostat in-
stallation by determining where the thermostat will be lo-
cated. In most cases, this will be pre-determined by the building
plans.
The thermostat should be located on an interior wall, about
5 ft from the ground. The thermostat should be located away
from direct sunlight, drafts, or interior heat sources which
may influence temperature readings.
The thermostat may also be mounted in a remote location
with the use of an optional remote room sensor. Refer to the
thermostat Application Instructions for more information on
thermostat installation.
Wiring Connections
WIRE APOLLO CONTROL TO THERMOSTAT — Wire
each thermostat to its respective Apollo control as shown in
Fig. 6. Wiring connections should be made at the wiring con-
nector board of the thermostat.
Electric shock can cause injury or death. Ensure power
to the rooftop unit has been disconnected before
wiring.
WIRE THERMOSTATTO COMMUNICATION BUS — The
thermostat is connected to the communication bus through
the thermostat wiring connection block. Connect the BLACK,
RED, and GREEN wires from the communication bus to the
thermostat wiring connection block. See Fig. 6. To connect
other devices to the communication bus, refer to the appli-
cation manual for that device.
Provide Power ToApollo Control — After the wir-
ing has been completed, provide power to the Apollo con-
trol. Once power has been provided, the Apollo control will
power the thermostat. The heating or cooling set points will
appear on the thermostat display screen. The thermostat is
now ready to be programmed. If the display is blank or blink-
ing, recheck the wiring connections between the thermostat
and Apollo control.
NOTE: The indicator lights verify each mode of operation.
Fig. 4 — Apollo Control
CONTROL
WIRING
APOLLO
CONTROL
WIRING TO
THERMOSTAT
Fig. 5 — Apollo Control Factory-Installed
In Typical Unit
2

Fig. 6 — Thermostat and Apollo Control Wiring
NOTE: Refer to Product Support Bulletin No. 93-005
for shielded wire applications when wiring the thermo-
stat to theApollo control and for all communication bus
wiring connections.
3

OPERATION
There are 3 system switches which are used to control op-
eration at the thermostat: Heat, Cool, and Fan. The Heat and
Cool switches can be set to either AUTO or OFF. The Fan
switch can be set to either AUTO or ON. When the fan is
running, the FAN indicator will be shown on the thermostat
display screen. When cooling mode is energized, the COOL
indicator will be shown on the thermostat display screen. When
heating mode is energized, the HEAT indicator will be shown
on the thermostat display screen. When the second stage of
heating or cooling is energized, a decimal point is displayed
between the heating and cooling set points.
AUTO Fan Mode — The fan will energize any time the
system energizes heating or cooling. The only exception is
when the thermostat controls a gas heating rooftop unit. The
thermostat will allow the rooftop unit to control the fan dur-
ing heating mode. The fan will run in cooling mode.
ON Fan Mode — The fan will operate continuously dur-
ing the occupied mode. In unoccupied mode the fan will only
operate when a system mode is energized.
AUTO Heating Mode — When the Heat switch is set
to AUTO, the Apollo control will energize heating when the
heating demand is 1.5° F or greater. The second stage of heat-
ing will energize when the demand becomes 2.0° F or greater.
OFF Heating Mode — When the Heat switch is set to
OFF, the Apollo control will not allow the rooftop unit to
energize heating.
AUTO Cooling Mode — When the Cool switch is set
to AUTO, theApollo control will energize cooling when the
cooling demand is 1.5° F or greater. The second stage of
cooling will energize when the demand becomes 2.0° F or
greater.
OFF Cooling Mode — When the Cool switch is set to
OFF, the Apollo control will not allow the rooftop unit to
energize cooling.
Temperature Trend Staging — When the Tempera-
ture Trend Staging option has been configured at the ther-
mostat, the thermostat tracks the temperatures at regular in-
tervals in each cooling or heating mode.As long as the space
temperature is improving, the Apollo control will not allow
the second stage to be energized. If the space temperature
stays the same or the demand becomes greater, the second
stage will energize.
Energy Saver Delay — When the thermostat enters a
cooling or heating mode and it detects a demand of 8° F or
greater, it will hold off energizing the second stage for
21 minutes. This will allow the first stage time to satisfy the
space demand.
Heating Lockout — When the heating lockout tem-
perature set point has been configured, and the Heating Lock-
out option has been configured to ON, the Apollo control
will not allow heating to energize when the outside air tem-
perature rises above the heating lockout set point.
Cooling Lockout — When the cooling lockout tem-
perature set point has been configured, and the Cooling Lock-
out option has been configured to ON, the Apollo control
will not allow cooling to energize when the outside air tem-
perature drops below the cooling lockout set point.
Time Delay Relay — The thermostat and the Apollo
control utilize a 5-minute time delay between the different
modes of operation for the rooftop unit. When a mode of
operation is deenergized, another mode cannot begin for
5 minutes.
TROUBLESHOOTING
SeeFig.7-11forfactory-wiring and Apollo control wir-
ing schematics.
Blank Display or Blinking Display at the
Thermostat
1. Check to ensure there is at least 20.5 VAC across the
2 terminals labelled 24 VAC.
2. If there is not at least 20.5 VAC, check the unit trans-
former which is powering the Apollo control.
3. If anAC voltage between 20.5 and 30 VAC is read, check
for 10 VDC between the terminal labelledWHTand RED.
If there is 0 VDC between the terminals, replace the Apollo
control.
4. If a value between 1 and 10 VDC is read, check the wir-
ing between the thermostat and the Apollo control.
5. If the thermostat display is blinking on and off, this is an
indication that there is a communication problem be-
tween the thermostat and the Apollo control. The ther-
mostat and the Apollo control communicate on the blue
and yellow wires. If either one is shorted, open, or crossed,
it will cause the thermostat display to blink.
NOTE: To check the wiring between the thermostat and the
Apollo control, do the following:
1. Remove the thermostat and connector board.
2. Wire the connector board to the Apollo control with a
short piece of 5-conductor cable.
3. Plug the thermostat into the connector board.
a. If thermostat powers up there is a wiring problem. Find
the open or shorted wire or replace the wiring between
the thermostat and the Apollo control.
b. If the thermostat does not power up, try another ther-
mostat. If the new thermostat will not power up, re-
place the Apollo control. If the new thermostat will
power up, replace the old thermostat.
The Control Will Not Energize Heating
1. The thermostat is not displaying the heat annunciator.
a. Check the heating lockout temperature set point and
options to make sure the outside air temperature is not
locking out heating mode.
b. Ensure that a sensor in the system is not reading above
the heating high limit temperature. If a supply air sen-
sor or a DX coil sensor is not connected to the Apollo
control, turn off the High Low Limits option at the
thermostat.
c. Check the Heat switch and make sure it is in the AUTO
position.
2. The thermostat is displaying the heat annunciator.
a. Check to see if the H1 LED is lit on the Apollo con-
trol. If it is not, replace the Apollo control. If the H1
LED is lit on the Apollo control, check the voltage
across the H1 relays contact. If it reads 24 VAC, re-
place the Apollo control. If it reads 0 to 2 VAC, check
the H1 contactor and the unit transformer.
4

The Control Will Not Energize Second Stage
Heating
1. The thermostat is not displaying the second stage indi-
cator. A decimal point on the thermostat display screen is
the indication that the thermostat is asking for second stage.
a. Check to see if the space demand is equal to or greater
than 2° F. The control must see a 2° F demand before
it will call for second stage.
b. Check the Temperature Trend Staging option. If this
option is on and space conditions are improving, the
control will hold off second stage.
c. Check the space demand. If the control entered a mode
and had a demand equal to or greater than 8° F, it will
hold off second stage for 21 minutes.
2. The thermostat is displaying the decimal point.
a. Check to see if the H2 LED is lit on the Apollo con-
trol. If it is not lit, replace the Apollo control.
b. The LED is lit but second stage is not energized. Check
the voltage across the H2 relay contact. If it reads
24 VAC, replace the relay board. If it reads
0 to 2 VAC, check the H2 contactor and the unit trans-
former.
The Control Will Not Energize Cooling
1. The thermostat is not displaying the cool annunciator.
a. Check the cooling lockout temperature set point and
options to make sure the outside-air temperature is not
locking out cooling mode.
b. Ensure that a sensor in the system is not reading be-
low the cooling low limit temperature. If a supply
air sensor or a DX coil sensor is not connected to the
relay pack, turn off High Low Limits at the
thermostat.
c. Check the Cool switch and make sure it is in the AUTO
position.
2. The thermostat is displaying the cool annunciator.
a. Check to see if the C1 LED is lit on the Apollo con-
trol. If it is not, replace the Apollo control. If the
C1 LED is lit on the Apollo control, check the voltage
across the C1 relay contact. If it reads 24 VAC, re-
place the Apollo control. If it reads 0 to 2 VAC, check
the C1 contactor and the unit transformer.
The Control Will Not Energize Second Stage
Cooling
1. The thermostat is not displaying the second stage indi-
cator. A decimal point on the thermostat display screen is
the indication that the thermostat is asking for second stage.
a. Check to see if the space demand is equal to or greater
than 2° F. The control must see a 2° F demand before
it will call for second stage.
b. Check the Temperature Trend Staging option. If this
option is on and space conditions are improving, the
control will hold off second stage.
c. Check the space demand. If the control entered a mode
and had a demand equal to or greater than 8° F, it will
hold off second stage for 21 minutes.
2. The thermostat is displaying the decimal point.
a. Check to see if the C2 LED is lit on the Apollo con-
trol. If it is not lit, replace the Apollo control.
b. The LED is lit but second stage is not energized. Check
the voltage across the C2 relay contact. If it reads
24 VAC, replace the Apollo control. If it reads
0 to 2 VAC, check the C2 contactor and the unit
transformer.
The Control Will Not Energize The Fan
1. The fan annunciator is not lit on the thermostat.
a. The Fan switch is in the AUTO position and the con-
trol is not in a mode (HEAT or COOL).
b. The Fan switch is in the ON position but the thermo-
stat is in setback and has no mode.
c. The thermostat has just received power or has just re-
set and is going through its initialization process.
2. The fan annunciator is lit on the thermostat.
a. Check the fan LED on the Apollo control. If it is not
lit, replace the Apollo control.
b. If the Fan LED is lit, check the voltage across the fan
relay contact. If it reads 24 VAC, replace the relay board.
If it reads 0 to 2 VAC, check the fan contactor and the
unit transformer.
5

Fig. 7 — Factory-Supplied Wiring To Rooftop Unit and Apollo Control
Fig. 8 — Apollo Control Wiring Schematic — 48/50HJ, 3 to 6 Ton Units
6

Fig. 9 — Apollo Control Wiring Schematic — 48/50TJ, 3 to 6 Ton Units
Fig. 10 — Apollo Control Wiring Schematic — 48HJ, 7
1
⁄ 2 to 12
1
⁄ 2 Ton Units;
48TJ, 7
1
⁄ 2 to 12
1
⁄ 2 Ton Units; 50HJ, 7
1
⁄ 2 to 20 Ton Units;
and 50TJ, 7
1
⁄ 2 to 25 Ton Units
7

Fig. 11 — Apollo Control Wiring Schematic — 48HJ, 13 to 20 Ton Units and
48TJ, 15 to 25 Ton Units
Copyright 1994 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1144
Tab 1a1b6a6b PC 111 Catalog No. 534-800 Printed in U.S.A. Form 48/50HJ,TJ-1SI Pg 8 9-94 Replaces: New