Honeywell Q7300L Thermostat User Manual

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Q7300L  
Series 2000 Commercial  
Thermostat Subbases  
INSTALLATION INSTRUCTIONS  
Table 2. Maximum Amps at 30 Vac.  
APPLICATION  
Relay  
Running (A)  
Inrush (A)  
3.5  
The Q7300L Thermostat Subbase is used with the  
T7300D,F Thermostat to provide electronic control of  
commercial 24 Vac single zone HVAC equipment. The  
T7300/Q7300L is designed for heat-cool applications using  
a valve and valve actuator combination for hydronic  
heating. See Table 1. It can also be used to control single-  
stage conventional heating systems. It provides two-speed  
fan control. Terminals are provided for the T7047 Remote  
Sensor or the T7147 Remote Sensor and Override  
Module. LEDs on the thermostat are prewired and labeled  
to indicate heat and cool operation. See Fig. 9 and 10 for  
hookup drawings. Refer to form 63-4355 for installation  
and operation of the T7300/Q7300.  
Fan  
1.6  
1.6  
1.6  
1.6  
Heat  
Cool  
3.5  
7.5  
Auxillary (Economizer)  
3.5  
Temperature:  
Ratings:  
Operating Ambient: 40°F to 110°F (4°C to 43°C).  
Shipping: -30°F to +150°F (-34°C to +65°C).  
Display Accuracy:  
1°F (+0.5°C).  
Setpoint:  
Range: 45°F to 95°F (7°C to 35°C).  
+
Table 1. Valve and Valve Actuator Combinations.  
Valve Model  
V5011A, C  
V5011F, G  
V5013A, C  
V5013F  
Valve Actuator Model  
ML7984A3019  
Differential: 2°F (1°C).  
Humidity Ratings:  
5% to 90% RH, noncondensing.  
ML7984A3001  
ML7984A3019  
ML7984A3001  
RECYCLING NOTICE  
If this control is replacing a control that contains  
mercury in a sealed tube, do not place your old  
control in the trash  
IMPORTANT  
The valve will not close if the wrong valve and  
valve actuator combination is used.  
Contact your local waste management authority for  
instructions regarding recycling and the proper  
disposal of the old thermostat.  
Electrical Rating:  
0 to 30 Vac, 50/60 Hz.  
2
System Current :  
VA maximum at 30 Vac, 50 or 60 Hz.  
6
INSTALLATION  
Output Relay Current:  
See Table 2.  
When Installing this Product…  
1.  
Read these instructions carefully. Failure to follow  
the instructions can damage the product or cause a  
hazardous condition.  
2.  
Check the ratings given in the instructions and on  
the product to make sure the product is suitable for  
your application.  
3
.
.
Installer must be a trained, experienced service  
technician.  
After completing installation, use these instructions  
to check out the product operation.  
4
®
U.S. Registered Trademark  
Copyright © 1996 Honeywell Inc. •  
All Rights Reserved  
62-0131-2  
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Q7300L SERIES 2000 COMMERCIAL THERMOSTAT SUBBASE  
YES  
NO  
NO  
5
FEET  
(1.5 METERS)  
NO  
M4823A  
Fig. 1. Typical location of thermostat or remote-mounted sensor.  
Do not mount the sensor(s) where it can be affected by:  
Location  
drafts, or dead spots behind doors and in corners.  
hot or cold air from ducts.  
radiant heat from sun or appliances.  
concealed pipes and chimneys.  
unheated (uncooled) areas such as an outside wall  
behind the thermostat.  
Subbase without Remote-Mounted  
Temperature Sensor  
Install the thermostat about 5 ft (1.5m) above the floor in  
an area with good air circulation at average temperature.  
See Fig. 1.  
Do not install the thermostat where it can be affected by:  
If more than one remote sensor are required, they must be  
arranged in a temperature averaging network consisting of  
two, three, four, five or nine sensors. See Fig. 2 through 6.  
drafts, or dead spots behind doors and in corners.  
hot or cold air from ducts.  
radiant heat from sun or appliances.  
concealed pipes and chimneys.  
unheated (uncooled) areas such as an outside wall  
behind the thermostat.  
IMPORTANT  
To avoid electrical interference, which can cause  
erratic performance, keep wiring runs as short as  
possible and do not run thermostat wires  
adjacent to the line voltage electrical distribution  
systems. Use shielded cable (Belden type 8762  
or equivalent for 2-wire and Belden type 8772 or  
equivalent for 3-wire). The cable shield must be  
grounded only at the controlled equipment case.  
Subbase with Remote-Mounted  
Temperature Sensor(s)  
If only the remote-mounted temperature sensor(s) is used  
to sense and control room temperature, then install the  
thermostat in an area that is accessible for setting and  
adjusting the temperature and settings.  
SUBBASE  
T
T
If both the subbase and remote-mounted temperature  
sensor(s) are used to sense and control room tempera-  
ture, then install the subbase about 5 ft above the floor in  
an area with good air circulation.  
T7047G  
T7047G  
T
T
T
T
Install the remote-mounted sensor(s) about 5 ft (1.5m)  
above the floor in an area with good air circulation at  
average temperature. See Fig. 1.  
M4838  
Fig. 2. Two T7047G Sensors providing  
temperature averaging network for  
T7300/Q7300 Thermostat/Subbase.  
62-0131—2  
2
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Q7300L SERIES 2000 COMMERCIAL THERMOSTAT SUBBASE  
SUBBASE  
SUBBASE  
T
T
T
T
T7047C  
T
T7047C  
T
T7047C  
T
T7047C  
T
T
T
T
T
T
T
T7047G  
T7047C  
T
T7047C  
T
T7047C  
T
T7047C  
T
T
T
T
T
T
M4839  
T7047C  
T
T7047C  
T
T7047C  
T
T
T
Fig. 3. Two T7047C Sensors and one T7047G Sensor  
providing temperature averaging network for T7300/  
Q7300 Thermostat/Subbase.  
M4842  
SUBBASE  
T
T
Fig. 6. Nine T7047C Sensors providing  
temperature averaging network for  
T7300/Q7300 Thermostat/Subbase.  
T7047C  
T
T7047C  
T
T
T
Mounting Subbase  
The subbase mounts horizontally on the wall or a 2 in. x 4 in.  
wiring box. Position the subbase horizontally on the wall or  
on a 2 in. x 4 in. wiring box.  
1
.
Position and level the subbase or wallplate (for  
appearance only). The thermostat functions properly  
even when not level.  
T7047C  
T
T7047C  
T
T
T
2
3
.
.
Use a pencil to mark the mounting holes. See Fig. 7.  
Remove the subbase or wallplate from the wall and  
drill two 3/16 inch holes in the wall (if drywall) as  
marked. For firmer material such as plaster or wood,  
drill two 7/32 inch holes. Gently tap anchors (pro-  
vided) into the drilled holes until flush with the wall.  
Position the subbase over the holes, pulling wires  
through the wiring opening.  
M4840  
4.  
Fig. 4. Four T7047C Sensors providing  
temperature averaging network for  
T7300/Q7300 Thermostat/Subbase.  
5
6
.
.
Loosely insert the mounting screws into the holes.  
Tighten mounting screws.  
WALL  
SUBBASE  
T
T
WIRES  
THROUGH WALL  
T7047G  
T7047G  
WALL  
T
T
T
T
T7047G  
ANCHORS  
(2)  
T
T
T7047G  
T7047G  
T
T
T
T
MOUNTING  
HOLES  
M4841  
MOUNTING  
SCREWS  
Fig. 5. Five T7047G Sensors providing  
temperature averaging network for  
T7300/Q7300 Thermostat/Subbase.  
M10237  
LEDS  
Fig. 7. Mounting the subbase.  
3
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Q7300L SERIES 2000 COMMERCIAL THERMOSTAT SUBBASE  
WIRING SUBBASE  
All wiring must comply with local electrical codes and ordinances. Follow equipment manufacturer wiring instructions when  
available. Refer to Fig. 9 and 10 for typical hookups. A letter code is located near each terminal for identification. See  
Table 3 for terminal descriptions and system action.  
Table 3. Terminal Descriptions and Conditions.  
Standard Terminal  
Designations  
Typical Connection  
Function  
Terminal Type  
A1, A2  
Damper Control Relay.  
input, output  
24V powered  
contact  
BM  
ML7984 Actuator connection. No call for heat, valve  
closed during occupied periods and open during  
unoccupied periods.  
output  
C1, C2, C3, C4, C5 Communication input for T7147.  
FC  
Fan control Transformer.  
input  
output  
GH  
High speed fan output. Activated during calls for cooling.  
24V powered  
contact  
GL  
Low speed fan output. Activated on calls for heat and  
fan On selection.  
output  
24V powered  
contact  
P1, P2  
Pump Interlock Relay. Operates circulator pump in  
hydronic heat or energizes conventional heat system.  
input, output  
24V powered  
contact  
R
24V System Transformer  
input  
RM  
ML7984 Actuator connection. No call for heat, valve  
closed. Call for stage 1 heat, valve approximately one-  
half open. Call for stage 2 heat, valve fully open.  
T, T  
X
Remote sensor input for T7047 or T7147.  
Heating transformer common  
Cool call  
input  
Y
24V output on Y  
CAUTION  
Disconnect power before wiring to prevent  
electrical shock or equipment damage.  
1.  
Loosen the terminal screws on the subbase and  
connect the system wires. See Fig. 8.  
IMPORTANT  
Use 18-gauge, solid-conductor color-coded  
thermostat cable for proper wiring. If using 18-  
gauge stranded wire, no more than ten wires can  
be used. Do not use larger than 18-gauge wire.  
FOR STRAIGHT  
INSERTION STRIP  
/16 IN. (8 MM).  
2.  
3.  
4.  
Securely tighten each terminal screw.  
Push excess wire back into the hole.  
Plug the hole with nonflammable insulation to  
prevent drafts from affecting the thermostat.  
FOR WRAPAROUND  
INSERTION STRIP  
5
7/16 IN. (11 MM).  
M4826  
Fig. 8. Proper wiring technique.  
NOTE: After wiring, check that all connections are tight  
and secure. See Fig. 8. Loose or intermittent wire  
connections cause inconsistent system operation.  
62-0131—2  
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Q7300L SERIES 2000 COMMERCIAL THERMOSTAT SUBBASE  
Typical Wiring Hookups  
SUBBASE  
R
A1  
P1  
RM  
BM  
A2  
P2  
Y
X
GH  
GL  
FC  
C5  
C4  
C3  
C2  
C1  
T
T
AS  
AS  
8
2
7
ML7984  
VALVE  
ACTUATOR  
3
T5  
9
COOLING  
RELAY  
HIGH  
SPEED  
FAN  
DAMPER  
CONTROL  
RELAY  
DISCHARGE  
AIR  
R1  
B3  
RELAY  
SENSOR  
CA5 CA4 CA3 CA2 CA1  
T
T
4
T6  
T7147 REMOTE COMFORT ADJUST MODULE  
GND  
LOW  
SPEED  
FAN  
5
PUMP  
INTERLOCK  
RELAY  
W
RELAY  
6
1
L1  
L1  
(HOT)  
(
HOT)  
L2  
L2  
1
FAN  
TRANSFORMER  
TRANSFORMER  
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
6
7
CONNECT GND TO EARTH GROUND.  
DISCHARGE AIR SENSOR IS ONLY COMPATIBLE WITH T7300F  
THERMOSTAT.  
INDEPENDENT FAN TRANSFORMER IS OPTIONAL. JUMPER FC TO R  
WHEN SINGLE TRANSFORMER IS USED.  
8
9
JUMPER GH AND GL FOR SINGLE SPEED FAN.  
3
4
REFER TO ML7984 INSTRUCTIONS FOR TERMINAL CONNECTIONS.  
T7047 HAS T-T TERMINALS ONLY.  
SET THE DIP SWITCHES ON THE ML7984 TO MECHANICAL  
SERIES 90 TO USE WITH Q7300L  
5
180 2W RESISTOR MUST BE INSTALLED AS SHOWN.  
M4950B  
Fig. 9. Q7300L hookup for two-stage heating with three-position  
ML7984 Valve Actuator/V5013 Valve and one-stage cooling.  
SUBBASE  
R
A1  
P1  
FC  
GH  
4
GL  
P2  
A2  
Y
BM  
RM  
X
C5  
C4  
C3  
C2  
C1  
T
T
HIGH-SPEED  
FAN RELAY  
PUMP  
INTERLOCK  
RELAY  
COOLING  
RELAY  
CA5 CA4 CA3 CA2 CA1  
T
T
2
LOW  
SPEED  
FAN  
DAMPER  
CONTROL  
RELAY  
T7147 REMOTE COMFORT ADJUST MODULE  
GND  
RELAY  
1
L1  
(
HOT)  
3
L2  
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
REFER TO T7147 INSTRUCTIONS FOR TERMINAL CONNECTIONS. T7047 HAS T-T TERMINALS ONLY.  
CONNECT GND TO EARTH GROUND.  
3
4
M4941C  
JUMPER GH AND GL FOR SINGLE SPEED FAN.  
Fig. 10. Q7300L hookup for single-stage conventional heating systems with single-stage cooling.  
5
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Q7300L SERIES 2000 COMMERCIAL THERMOSTAT SUBBASE  
A. ENGAGE TABS AT TOP OF THERMOSTAT AND SUBBASE OR WALLPLATE.  
Mounting Thermostat on Subbase  
Mount the thermostat on the subbase after the subbase is  
installed.  
1.  
Engage tabs at the top of the thermostat and  
subbase. Fig. 11.  
2.  
Press lower edge of case to latch.  
NOTE: To remove the thermostat from the wall,  
first pull out at the bottom of the thermo-  
stat; then remove the top.  
IMPORTANT  
Refer to the thermostat installation instructions for  
B. PRESS LOWER EDGE OF CASE TO LATCH.  
Installer Setup, Settings, Installer System Test  
and Troubleshooting information.  
M4824A  
Fig. 11. Mounting thermostat on subbase.  
62-0131—2  
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Q7300L SERIES 2000 COMMERCIAL THERMOSTAT SUBBASE  
OPERATION  
Table 4. T7300 Thermostat/Q7300L Subbase Sequence of Operation.  
System  
Setting  
Fan  
Setting  
Equipment  
Call  
Loads  
Energized  
a
Mode  
Action  
Occupied  
Any  
Auto  
On  
Thermostat in Occupied mode.  
Damper control relay energized.  
A2  
Occupied  
Occupied  
Depends on last system. If cool is the last  
system, then call is for high speed fan.  
When heat is the last system, then call is  
for low speed fan.  
GL or GH  
Heat  
Auto  
Stage 1 heat Heat LED activated.  
In hydronic applications, ML7984  
A2, GL, RM,  
P2  
approximately one-half open.  
Pump interlock relay activated to energize  
circulator pump.  
In conventional applications, stage 1 heat  
activated.  
Low speed fan activated.  
Occupied  
Occupied  
Heat  
Cool  
Auto  
Auto  
Stage 2 heat In hydronic applications, ML7984 is fully  
open. In conventional systems, no action.  
A2, GL, RM,  
BM, P2  
Stage 1 cool Cool LED activated.  
Cooling relay activated.  
A2, GH, Y  
High speed fan activated.  
Unoccupied  
Unoccupied  
Any  
Any  
Any  
On  
Thermostat in Unoccupied mode.  
Damper control relay de-energized.  
Thermostat in Unoccupied mode.  
System fan operates at appropriate speed  
with call for heat or cool equipment.  
a
Low speed fan is activated in the heat mode and high speed fan is activated in the cool mode.  
Remote Temperature Sensing and Override  
The subbase can be used with the T7147 Remote Sensors to sense temperature and provide the Occupied mode. The  
subbase also can be used with the T7047 Remote Sensors if remote occupied control is not required.  
7
62-0131—2  
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Honeywell Inc.  
Honeywell Plaza  
Home and Building Control  
Honeywell Limited-Honeywell Limitée  
155 Gordon Baker Road  
North York, Ontario  
®
Helping You Control Your World  
P.O. Box 524  
Minneapolis, MN 55408-0524  
M2H 3N7  
62-0131—2 J.H. Rev. 7-97  
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