| Вид документа | Технічний документ |
|---|---|
| Виробник | JCI |
| Код документа | T28-Fan-Coil |
| Сторінок | 5 |
| Мова документа | англійська |
| Розмір файлу | 0.3 МБ |
Текст документа
Installation Instructions T28
Issue Date 0918
T28 Fan Coil Thermostat
Application Requirements Parts Included
The T28 thermostats control line voltage fan coil units thermostat
and zone valves on heating, cooling, and a
2 No. 6 screws
combination of heating and cooling equipment. The
thermostats directly control one or two zone valves. 2 fiber washers
Thermostats with fan switches require a two-gang
Note: Plaster rings and switch box are not furnished.
switch box at least 2 1/2 in.-deep, or a 4 in. by 4 in. or
larger junction box with a two-fixture plaster ring. For Dimensions
example, use Raco No. 230 or Appleton No.4SD1/2 Refer to Figure 1 and Figure 2 for detailed dimensions
two-gang switch box, plus plaster ring. of the T28 Fan Coil Thermostat.
Thermostats without fan switches require a 2 in.-deep
Mounting
single, vertical switch box or a larger box with a
single-fixture plaster ring. For example, use Raco Location Considerations
No. 420 or Appleton No. 111 single switch box. Mount the thermostat about 4 to 5 ft. (1.2 to 1.5 m)
above the floor on an interior wall, where it can sense
Note: The boxes and plaster rings are not included
the average room temperature. Do not mount the
with the thermostat.
thermostat where it may react to heat or cold from
Installation water pipes, windows, doors, lamps, sunlight, or other
heat or cold sources.
IMPORTANT: Use this T28 Fan Coil Thermostat
only to control equipment under normal operating On unit heater applications, place the thermostat
conditions. Where failure or malfunction of the below and behind the heater in the path of air entering
thermostat could lead to personal injury or property the unit—not in the path of discharge air.
damage to the controlled equipment or other 1. Install the switch box and plaster ring (when
property, additional precautions must be designed required). See Figure 3.
into the control system. Incorporate and maintain
other devices, such as supervisory or alarm systems 2. Remove the cooling anticipator resistor to prevent
or safety or limit controls, intended to warn of or over-anticipation on 208/240 VAC installations.
protect against failure or malfunction of the Carefully clip the left-hand resistor leads with
thermostat. diagonal cutters. See Figure 3.
IMPORTANT : Utiliser ce T28 Fan Coil Thermostat 3. Refer to Wiring section to make the necessary
uniquement pour commander des équipements dans connections.
des conditions normales de fonctionnement. 4. Loosen the cover screw at the bottom of the cover,
Lorsqu'une défaillance ou un dysfonctionnement du swing the cover bottom out, and lift up to remove.
thermostat risque de provoquer des blessures ou
d'endommager l'équipement contrôlé ou un autre 5. Fasten the thermostat to the switch box with the
équipement, la conception du système de contrôle two captive screws in the baseplate.
doit intégrer des dispositifs de protection 6. Carefully remove the contact protector (insulation
supplémentaires. Veiller dans ce cas à intégrer de barrier). See Figure 3. Move the temperature
façon permanente d'autres dispositifs, tels que des setting lever from Cool to Warm to be sure the
systèmes de supervision ou d'alarme, ou des contact arm is free.
dispositifs de sécurité ou de limitation, ayant une
fonction d'avertissement ou de protection en cas de 7. Reposition the cover, and tighten the cover screw.
défaillance ou de dysfonctionnement du thermostat. 8. Turn on the power supply.
9. Check the thermostat operation. Refer to the
Checkout section.
© 2018 Johnson Controls 1
Part No. 24-9715-0, Rev. C www.penncontrols.com
Two Mounting Holes for Number 6 Screws
1.13
(29)
5.19 3.28 2.88
(132) (83) (73)
1.56 1.19
3.13 1.19 (30)
(40)
(80) (30)
1.19
(30)
Figure 1: T28 Without Fan Switch, in. (mm)
Two Mounting Holes for Number 6 Screws
0.20
(5)
COOL
FAN
OFF
HIGH 5.19 3.28 2.81
(132) (83) (71)
MED
LOW
1.19 2.67
5.00 2.06 0.78 (30) (68)
(127) (52) (20)
3.08 1.56
(78) (40)
Figure 2: T28 with Fan Switch, in. (mm)
Two-gang
Switch Box
Fiber
Washer (2)
Cover Insulation
Barrier
or
Junction
Plaster Box
Cover Ring
Screw
(Switch Box and
Plaster Ring Not Furnished)
Mounting
Screws (2)
Figure 3: Mounting the T28 to an Outlet Box, in. (mm)
2 T28 Fan Coil Thermostat Installation Instructions
Wiring Sequenced Heating-Cooling
Make wiring connections using wire nuts or other Note: Sequenced heating-cooling models have a
approved solderless connectors. See wiring diagrams deadband allowing automatic changeover on
for proper connections. three-pipe or four-pipe systems.
! No Fan Selector
WARNING: Risk of Electric Shock. HEATING - COOLING
Disconnect or isolate all power supplies before
making electrical connections. More than one
disconnection or isolation may be required to h
completely de-energize equipment. Contact with
components carrying hazardous voltage can cause
electric shock and may result in severe personal Brown to Heating
injury or death. Orange (hot) to L1
Red to Cooling
AVERTISSEMENT : Risque de décharge
électrique. Débrancher ou isoler toute alimentation Figure 6: T28DA Sequenced Heating-Cooling
avant de réaliser un branchement électrique. Thermostat
Plusieurs isolations et débranchements sont
peut-être nécessaires pour -couper entièrement Fan “OFF” Closes Cooling Valve
l'alimentation de l'équipement. Tout contact avec Blue to Fan
des composants conducteurs de tensions
dangereuses risque d'entraîner une décharge Off
électrique et de provoquer des blessures graves, h
On
voire mortelles.
Red to
Orange Brown Cooling
Cooling (hot) to L1 to Heating
Yellow
Tan to Fan
Blue Figure 7: T28DB Sequenced Heating-Cooling
HI Thermostat with “Off-On” Fan Switch
Off LO Yellow
h Tan to Fan
Blue
HI
Red to LO
Cooling Off
Orange (hot) to L1 h
On
Figure 4: T28BD Cooling Thermostat with Red to
“Off-HI-MED-LO” Fan Switch Orange Brown Cooling
(hot) to L1 to Heating
Heating-Cooling Note: Fan “OFF” Closes Heating
and Cooling Valves
Yellow
Tan to Fan
Blue Figure 8: T28DD Sequenced Heating-Cooling
HI
Thermostat with “Off-HI-MED-LO” Fan Switch
Off LO
h Yellow
Tan to Fan
Blue
HI
Red to
Orange Brown Cooling LO
h
(hot) to L1 to Heating Off
On
Red to
Figure 5: T28CD Heating-Cooling Thermostat with Cooling
“Off-HI-MED-LO” Fan Switch Orange Brown
(hot) to L1 to Heating
Figure 9: T28DG Sequenced Heating-Cooling
Thermostat with “Off-HI-MED-LO” Fan Switch
T28 Fan Coil Thermostat Installation Instructions 3
Table 1: Electrical Ratings (In Amperes)
Thermostat (Pilot Duty)
Cooling Heating Fan Switch
Volts, AC
Normal Inrush Normal Inrush Full Load Locked Rotor
120 0.32 1.0 0.12 0.36 5.8 34.8
208 0.18 0.57 0.07 0.21 3.3 19.8
240 0.16 0.50 0.06 0.18 2.9 17.4
Setup and Adjustments Repairs and Replacement
Field repairs must not be made. For a replacement
Calibration
thermostat, contact the nearest Johnson Controls
If the thermostat has a thermometer in the cover, representative.
recalibrate the thermometer by following the steps
below:
1. Remove the thermostat cover.
2. Place an accurate test thermometer and the cover
side-by-side, allowing both the test thermometer
and the cover thermometer to reach a stable
temperature before adjusting.
3. Carefully turn the hex nut behind the insulator with
a thin wrench until the pointer corresponds to the
temperature indicated by the test thermometer.
Checkout
Before leaving the installation, observe at least three
complete operating cycles to ensure that all
components are functioning correctly. Follow the steps
below:
1. Move the lever toward Warm to raise the
temperature setting to check the heating cycle.
2. Move the lever toward Cool to lower the
temperature setting to check the cooling cycle.
The center of the scale is approximately 75°F
(24°C).
4 T28 Fan Coil Thermostat Installation Instructions
Technical Data
Product T28 Fan Coil Thermostat
Thermostat 55 to 95°F (12 to 35°C)
Range
Thermometer 55 to 85°F (12 to 30°C)
Heating 0.6F° (0.3C°)
Nominal Operating Cooling 1F° (0.5C°) for typical 120 V Fan Coil Valve Loads
Differential Heating-Cooling Models with Automatic Changeover (T28D) have a 6F° (3.3C°)
Differential from Heating On to Cooling On
Adjustment Cool to Warm
Contact Action Snap-acting Bimetal-operated
Baseplate Cold Rolled Steel, Baked on Beige Paint
Material and Finish
Cover Cold Rolled Steel, Baked on Ivory Paint
Thermometer Bimetal Type for Accuracy and Clarity, may be Field Adjusted
Without Fan Switch Standard Outlet Box with Captive Screws
Mounting
With Fan Switch Mounts to a Two-Gang Switch Box
Wiring Connections Color Coded 18 AWG Wire Leads, 6 in. (152 mm) Long
Individual Pack - 1.0 lb (0.45 kg)
Without Fan Switch
Overpack of 20 Units - 23.6 lb (10.7 kg)
Shipping Weight
Individual Pack - 1.3 lb (0.59 kg)
With Fan Switch
Overpack of 20 units - 29.5 lb (13.4 kg)
Agency Listings UL Listed: File E6688, CCN XAPX
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these
specifications, consult the local Johnson Controls office. Johnson Controls shall not be liable for damages resulting from misapplication or
misuse of its products.
www.penncontrols.com
® Johnson Controls and PENN are registered trademarks of Johnson Controls in the
United States of America and/or other countries. All other trademarks used herein are the property
of their respective owners. © Copyright 2018 by Johnson Controls. All rights reserved.
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